HomeMy WebLinkAboutMINUTES - 02042025 - BOS Complete Min PktMeeting Minutes
CONTRA COSTA COUNTY BOARD OF
SUPERVISORS
Supervisor John Gioia, District I
Supervisor Candace Andersen, District II
Supervisor Diane Burgis, District III
Supervisor Ken Carlson, District IV
Supervisor Shanelle Scales-Preston, District V
Clerk of the Board (925) 655-2000
clerkoftheboard@cob.cccounty.us
9:00 AMTuesday, February 4, 2025
1.CALL TO ORDER; ROLL CALL
District I Supervisor John Gioia, District II Supervisor Candace
Andersen, District IV Supervisor Ken Carlson, and District V
Supervisor Shanelle Scales-Preston
Present:
District III Supervisor Diane BurgisAbsent:
2.PLEDGE OF ALLEGIANCE
3.CLOSED SESSION
A.CONFERENCE WITH LEGAL COUNSEL--ANTICIPATED LITIGATION
Significant exposure to litigation pursuant to Gov . Code, § 54956.9(d)(2): [One potential case]
B.CONFERENCE WITH LEGAL COUNSEL--ANTICIPATED LITIGATION
Initiation of litigation pursuant to Gov. Code, § 54956.9(d)(4): [One potential case]
C.PUBLIC EMPLOYMENT Gov. Code § 54957
Title:Health Services Director
The Board expressed it's intent to appoint Dr . Ori Tzvieli as Interim Heath Director upon the
retirement of the current director Anna Roth;
By unanimous vote, Supervisor Burgis absent, the Board agreed to join as an interested party in
case of California Department of Water Resources v. All Persons Interested, Sacramento Superior
Court Case No. 2025-CV-00074.
A fire occurred at the Martinez Refinery after the publication of the Board's agenda . By
unanimous vote, Supervisor Burgis absent, the Board added an Urgency Item (U.1) to today's
agenda to receive a report from Health Services .
4.Inspirational Thought-
Page 1 of 16
BOARD OF SUPERVISORS Meeting Minutes February 4, 2025
"Live your life more passionately, shape your inner being and shape how you project yourself
onto the world." ~Judith Sabah, motivationalist
5.
Motion:Scales-Preston
CarlsonSecond:
District I Supervisor Gioia, District II Supervisor Andersen,
District IV Supervisor Carlson, and District V Supervisor
Scales-Preston
Aye:
District III Supervisor BurgisAbsent:
Result:Passed
6.PRESENTATIONS
PR.1
7.DISCUSSION ITEMS
U.1 U.1 RECEIVE a report from the Health Services Department on the
February 1 fire at the Martinez Refining Co. refinery in Martinez.
25-432
Attachments:2025-02-04 U.1 Commentary.pdf
D.1.RECEIVE presentation from the Contra Costa Budget Justice Coalition .
(Sarah Gurdian, Program Director, Budget Justice Coalition and Ryan
Fukumori, Policy Link Senior Associate)
25-399
Attachments:Budget Justice Coalition Presentation
Bay Area Equity Atlas
Speakers: Mackenzie, First 5 Contra Costa; Mariana Moore, Ensuring Opportunity
Campaign; Craig Lazzeretti; Rachel Rosekind; Yehudit Lieberman; Mica; Elizabeth
Ritchie; Sammone Weaver; Diana Honig; Ruth Kidane, Budget Justice Coalition;
Linda Olvera, Contra Costa Immigrants Rights Alliance.
Page 2 of 16
BOARD OF SUPERVISORS Meeting Minutes February 4, 2025
D.2.CONSIDER reviewing and approving the Draft Request for Proposals for
Exclusive Emergency Ambulance Service in Contra Costa County
Emergency Response Areas I, II, and V; and DIRECT the Emergency
Medical Services Agency, to finalize the Request for Proposals for
submission to California Emergency Medical Services Authority, as
recommended by the Health Services Director. (Marshall Bennett, Director
of Emergency Medical Services)
25-408
Attachments:DRAFT--Contra Costa County CA RFP
Contra Costa County, CA RFP Public Comment 25.1.30
Speakers: Elizabeth Ritchie.
Approved
Motion:Scales-Preston
GioiaSecond:
District I Supervisor Gioia, District II Supervisor Andersen,
District IV Supervisor Carlson, and District V Supervisor
Scales-Preston
Aye:
District III Supervisor BurgisAbsent:
Result:Passed
D.3 CONSIDER consent item previously removed.
There were no consent items removed for discussion .
U.1 Receive a report from the Health Services Department on the February 1
fire at the Martinez Refining Co. refinery in Martinez.
25-434
D.4 PUBLIC COMMENT (2 Minutes/Speaker)
There were no requests to speak at public comment .
D.5 CONSIDER reports of Board members.
Supervisor Gioia attended the California State Association of Counties (CSAC) Executive
Committee meeting last week in San Diego . The Committee noted that in light of the recent
attempts to freeze federal funding in grants and loans, there may be delays in receiving funds .
The National Association of States and Counties (NACO) will be heavily involved in protecting
federally funded programs into the future .
Page 3 of 16
BOARD OF SUPERVISORS Meeting Minutes February 4, 2025
8.ADJOURN to the Board of Supervisors luncheon with the Judicial Bench of the Contra
Costa County Superior Court - Wakefield Taylor Courthouse, 725 Court Street,
Courtroom 209 2nd Floor, Martinez
Adjourned today's meeting at 4:25 p.m.
9.CONSENT CALENDAR
Airport
CONSIDER CONSENT ITEMS
A motion was made to approve the Consent Agenda. The motion carried by the
following vote:
District I Supervisor Gioia, District II Supervisor Andersen,
District IV Supervisor Carlson, and District V Supervisor
Scales-Preston
Aye:
District III Supervisor BurgisAbsent:
Result:Passed
C.1.APPROVE and AUTHORIZE the Director of Airports, or designee, to
execute a month-to-month hangar rental agreement with Russell Atkinson,
for a south-facing T-Hangar at Buchanan Field Airport effective January 22,
2025, in the monthly amount of $372, Pacheco area. (100% Airport
Enterprise Fund)
25-352
Attachments:Hangar Rental Agmnt - Russell Atkinson
approved
Animal Services
C.2.ACCEPT the monetary donation report from the Animal Services
Department, which describes the source and value of each gift received
by Animal Services for FY 2024/25, Quarter 2: October 1, 2024 through
December 31, 2024. (No fiscal impact)
25-353
Attachments:2024.25_FY Q2 ABF Donations Report
approved
Board of Supervisors (District Offices)
C.3.APPROVE and AUTHORIZE the allocation of $127,317 from the
Crockett-Cogeneration Property Tax Allocation for four projects, as
recommended by the Crockett Community Foundation and Supervisor
Scales-Preston. (100% General Fund)
25-354
Attachments:Resolution 2024-1.pdf
approved
Clerk of the Board
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BOARD OF SUPERVISORS Meeting Minutes February 4, 2025
C.4.ADOPT Resolution No. 2025-22 proclaiming African American Mental
Health Awareness Week February 16-22, 2025 and Miles Hall Day of
Remembrance February 15, 2025 and Tyrell Wilson Day of
Remembrance March 8, 2025, as recommended by Supervisor Andersen.
RES 2025-22
Attachments:Resolution No. 2025-22.pdf
adopted
C.5.ADOPT Resolution No. 2025-23 recognizing the 80th Anniversary of
Bayo Vista First Baptist Church, as recommended by Supervisor
Scales-Preston.
RES 2025-23
Attachments:Resolution No. 2025-23.pdf
adopted
C.6.REAPPOINT Willie J. Robinson to the District 1, Seat 2 on the Measure
X Community Advisory Board for a term ending on March 31, 2027, as
recommended by Supervisor Gioia.
25-355
approved
C.7.ACCEPT the Contra Costa County Measure X Community Advisory
Board (MXCAB) 2024 Advisory Body Annual Report.
25-356
Attachments:MXCAB Advisory Body Annual Report FINAL 2024
approved
C.8.ACCEPT the resignation of Linda Schultz, DECLARE a vacancy in the
Appointee 3 Seat on the County Service Area P-5 Citizen Advisory
Committee for a term ending December 31, 2025, and DIRECT the
Clerk of the Board to post the vacancy as recommended by Supervisor
Andersen.
25-357
approved
C.9.ACCEPT the Contra Costa County Measure X Community Fiscal
Oversight Committee (MXCFOC) 2024 Advisory Body Annual Report.
25-358
Attachments:2024 Measure X Fiscal Oversight Committee Annual Report Final
approved
Clerk-Recorder/Elections
C.10
.
APPROVE and AUTHORIZE the Purchasing Agent to execute, on
behalf of the Clerk-Recorder, a purchase order with General Data Tech,
LP, in an amount not to exceed $6,268 and a related service agreement
with NetApp to provide secure electronic data storage, support, and
maintenance for the period April 1, 2025 through March 31, 2026.
(100% Recorder Micrographics/Modernization Fund)
25-359
approved
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BOARD OF SUPERVISORS Meeting Minutes February 4, 2025
C.11
.
APPROVE and AUTHORIZE the Purchasing Agent, on behalf of the
Clerk-Recorder, to execute a purchase order with R-Computer, Inc ., in
an amount not to exceed $39,606 for the purchase of computers, servers,
software, licensing and warranty coverage. (100% General Fund)
25-360
approved
County Administration
C.12
.
RECEIVE the 2024-2025 property tax administrative cost recovery
report of the Auditor-Controller, FIX March 11, 2025 at 9:30 a.m.for a
public hearing on the determination of property tax administrative costs,
and DIRECT the Clerk of the Board to notify affected local jurisdictions
of the public hearing and to prepare and publish the required legal notice
and make supporting documentation available for public inspection, as
recommended by the County Administrator.
25-361
Attachments:2024-2025 Property Tax Administration Report.pdf
approved
County Counsel
C.13
.
APPROVE amended Conflict of Interest Code for Delta Diablo,
including the list of designated positions, as recommended by County
Counsel.
25-362
Attachments:Exhibit A - Conflict of Interest Code for Delta Diablo
Exhibit B - Conflict of Interest Code for Delta Diablo - REDLINE
approved
District Attorney
C.14
.
APPROVE and AUTHORIZE the District Attorney, or designee, to
execute a contract with Othram, Inc. in an amount not to exceed $84,200
for forensic genealogy research services when needed to solve cold
cases, for the period February 1, 2025 through September 30, 2027.
(100% Federal)
25-363
approved
C.15
.
APPROVE clarification of Board action of January 21, 2025 (25-264),
which authorized the District Attorney's Office to execute a contract
with General Datatech, L.P., to reflect the correct contract payment limit
of $96,079 instead of $94,125, with no change to the term through
January 13, 2026, for the installation of backup storage to accommodate
data growth. (100% General Fund)
25-364
approved
Employment & Human Services
C.16
.
APPROVE and AUTHORIZE the Purchasing Agent, or designee, to
renew, on behalf of the Employment and Human Services Director, a
25-365
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BOARD OF SUPERVISORS Meeting Minutes February 4, 2025
Blanket Purchase Order with Sysco Food Services in an amount not to
exceed $1,000,000 for the purchase of food products for the County's
Head Start program for the period January 1, 2025, through December
31, 2027. (60% State, 40% Federal)
approved
Health Services
C.17
.
ADOPT Ordinance No. 2025-03, amending the County’s mobile vendor
regulations related to authorized hours and locations of operation,
vending near certain specified uses, and vending within the public
right-of-way to ensure public safety and prevent traffic hazards. (100%
Environmental Health Fees)
25-390
Attachments:Ordinance No. 2025-03 Mobile Vendor Regulations
Signed Ordinance No. 2025-03.pdf
approved
C.18
.
APPROVE and AUTHORIZE the Health Services Director, or designee,
to execute a contract amendment with Telemedicine Group P .C. (dba
TeleMed2U), to increase the payment limit by $1,500,000 to an amount
not to exceed $3,300,000 to provide additional behavioral health and
medical psychiatric telehealth services to Contra Costa Health Plan
members with no change in the term ending December 31, 2025. (100%
Contra Costa Health Plan Enterprise Fund II)
25-391
approved
C.19
.
APPROVE and AUTHORIZE the Health Services Director, or designee,
to execute a contract with the City of Pittsburg, in an amount not to
exceed $543,131 to provide outreach services to residents who have
serious and persistent mental illness and multiple encounters with police
under the Mental Health Evaluation Team Program for the period July 1,
2024 through June 30, 2027. (100% Assembly Bill 109 funds)
25-392
approved
C.20
.
APPROVE and AUTHORIZE the Health Services Director, or designee,
to execute a contract with Signature Parking, LLC, in an amount not to
exceed $500,000 to provide parking management services for Contra
Costa Regional Medical Center for the period January 1, 2025 through
December 31, 2025. (100% Hospital Enterprise Fund I)
25-393
approved
C.21
.
APPROVE and AUTHORIZE the Purchasing Agent, or designee, to
execute on behalf of the Health Services Director, 1) a purchase order
with Meridian Leasing Corporation ("Meridian") in an amount not to
exceed $116,240 to lease Omnicell automated dispensing cabinets at the
Contra Costa Regional Medical Center Youth Stabilization Unit and
Infusion Clinic and reimburse Meridian for personal property taxes, 2) a
25-394
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BOARD OF SUPERVISORS Meeting Minutes February 4, 2025
Supplemental to the Master Lease Agreement with Meridian to provide
two automated dispensing cabinets for the period April 1, 2025 through
March 31, 2030. (100% Hospital Enterprise Fund I)
approved
C.22
.
APPROVE and AUTHORIZE the Purchasing Agent, or designee, to
purchase on behalf of the Health Services Director, up to 100 Walmart
vouchers, 50 Albertson's grocery vouchers, and 500 Bart Clipper Cards
plus processing fees of up to $1,500 totaling an amount not to exceed
$17,500 for unemployed, unhoused clients reentering the community
from detention with substance use disorders participating in the
Crossroads Program at the West County, Martinez or Marsh Creek
Detention Facilities during the period February 1, 2025 through January
31, 2026. (100% Board of State and Community Corrections Residential
Substance Abuse Treatment funds)
25-395
approved
C.23
.
APPROVE and AUTHORIZE the Purchasing Agent, or designee, on
behalf of the Health Services Director, to execute a purchase order
amendment with Forward Advantage Holdings, Inc, to extend the term
through October 29, 2025, with no change to the original payment limit
of $659,833 for the purchase of Imprivata single sign-on and
multi-factor authentication software, and iGel network software. (100%
Hospital Enterprise Fund I)
25-396
approved
C.24
.
APPROVE and AUTHORIZE the Purchasing Agent, or designee, to
execute on behalf of the Health Services Director, a purchase order with
Trace3, LLC in an amount not to exceed $569,997 for Cisco network
switches, and a Cisco letter agreement with Cisco Systems, Inc. for
server support services for the period of December 15, 2024 through
December 14, 2027. (100% Hospital Enterprise Fund I)
25-397
approved
Information and Technology
C.25
.
APPROVE and AUTHORIZE the Chief Information Officer, or
designee, to execute a Motorola Solutions Customer Agreement with
Motorola, Inc. to provide access for the County, and other state or local
government agencies that use the East Bay Regional Communications
System Authority System, to purchase products and services under the
terms and pricing of the Agreement for the term of February 1, 2025,
through January 31, 2030. (No fiscal impact)
25-366
approved
C.26
.
APPROVE and AUTHORIZE the Purchasing Agent, on behalf of the
Chief Information Officer, to execute a purchase order, with
25-367
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BOARD OF SUPERVISORS Meeting Minutes February 4, 2025
Computacenter United States, Inc., in an amount not to exceed $380,000
for the purchase of Rubrik Security Cloud hardware, licensing and
support for the period of February 4, 2025, through February 3, 2026.
(100% User Departments)
approved
Library
C.27
.
APPROVE and AUTHORIZE the Purchasing Agent to execute, on
behalf of the County Librarian, a purchase order with Califa Group in an
amount not to exceed $6,038 for the renewal of Quipu Group LLC’s
eRenew subscription through Califa Group, for the period March 1,
2025, through February 28, 2026. (100% Library Fund)
25-368
approved
C.28
.
APPROVE and AUTHORIZE the County Librarian, or designee, to
close the Prewett Library in Antioch on Wednesday, February 12, 2025,
to coincide with the holiday closure of the Antioch Community Center to
observe Abraham Lincoln’s Birthday. (No fiscal impact)
25-369
approved
Public Defender
C.29
.
APPROVE and AUTHORIZE the Public Defender, or designee, to
execute a contract amendment with the California State University Long
Beach Research Foundation, to increase the payment limit by $14,000 to
a new payment limit of $314,100, to provide survey incentives to
Holistic Intervention Partnership (HIP) participants, effective February
1, 2025 through June 1, 2026. (100% State)
25-370
Public Works
C.30
.
ADOPT Resolution No. 2025-24 accepting completion of private
improvements for the Road Improvement Agreement and release of cash
deposit for land use permit LP16-02031, for a project developed by CP
Logistics Willow Pass, LLC, as recommended by the Public Works
Director, Concord area. (100% Developer Fees)
RES 2025-24
adopted
C.31
.
ADOPT Resolution No. 2025-25 approving and authorizing the Public
Works Director, or designee, to fully close a portion of Ramona Way,
between 1556 Ramona Way and 1558 Ramona Way, on April 11, 2025,
from 8:00 a.m. through 5:00 p.m., for the purpose of replacing a utility
pole, Alamo area. (No fiscal impact)
RES 2025-25
adopted
C.32
.
ADOPT Traffic Resolution No. 2025/4546 to establish a speed limit of
25 miles per hour on Pacifica Avenue, which extends from Driftwood
25-371
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BOARD OF SUPERVISORS Meeting Minutes February 4, 2025
Drive to Port Chicago Highway, as recommended by the Public Works
Director, Bay Point area. (No fiscal impact)
Attachments:Traffic Resolution No. 2025/4546
Signed Traffic Resolution No. 2025/4546.pdf
approved
C.33
.
ADOPT Traffic Resolution No. 2025/4547 to establish a school zone
speed limit of 20 miles per hour on a portion of Pacifica Avenue, as
recommended by the Public Works Director, Bay Point area. (No fiscal
impact)
25-372
Attachments:Traffic Resolution No. 2025/4547
Signed Traffic Resolution No. 2025/4547.pdf
approved
C.34
.
ADOPT Ordinance No. 2025-01 to amend Division 1014 of the
Ordinance Code (Stormwater Management and Discharge Control) to
enact new stormwater source control, site design, and stormwater
treatment requirements required by the new Municipal Regional
Stormwater National Pollutant Discharge Elimination System Permit
issued by the California Regional Water Quality Control Board, San
Francisco Bay Region, and related Resolution No. 2025-26 approving a
new C.3 Guidebook, as recommended by the Public Works Director,
Countywide. (100% Stormwater Utility Assessment Funds)
RES 2025-26
Attachments:Ordinance No. 2025-01
Notice of Exemption
C.3 Guidebook
Signed Ordinance No. 2025-01.pdf
adopted
C.35
.
APPROVE and AUTHORIZE the Purchasing Agent, or designee, to
execute, on behalf of the Public Works Director, a blanket purchase
order with Republic Services, Inc., in an amount not to exceed
$1,000,000 for disposal services at their landfill facility, for the period of
January 1, 2025 through December 31, 2027, West County. (100%
Various Funds)
25-373
approved
C.36
.
APPROVE and AUTHORIZE the Public Works Director, or designee,
to execute an Amendment to a Lease between the County, as Lessee, and
Sand Creek Business Associates I, LLC, as Lessor, for approximately
14,098 square feet of medical/office space located at 171 Sand Creek
Road, Brentwood, to decrease the annual rent for the five-year period
beginning September 1, 2025, from $293,280 to $282,516; add one
five-year renewal option; and clarify that Lessor is responsible for any
maintenance or repairs that result from settling/foundation issues, as
requested by the Health Services Department, and as recommended by
25-374
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BOARD OF SUPERVISORS Meeting Minutes February 4, 2025
the Public Works Director. (100% Health Services – Enterprise Fund I)
Attachments:Lease Amendment 171 Sand Creek Road FINAL
approved
C.37
.
APPROVE and AUTHORIZE the Public Works Director, or designee,
to submit two grant applications to the United States Department of
Transportation Promoting Resilient Operations for Transformative,
Efficient, and Cost-Saving Transportation (PROTECT) grant program
for fiscal year 2024/2025 for the San Pablo Dam Road Rehabilitation
and Pinehurst Road Slope Failures and Erosion Repair projects, El
Sobrante and Canyon areas. (80% PROTECT Grant Funds, 20% Local
Road Funds)
25-375
approved
C.38
.
APPROVE and AUTHORIZE the Public Works Director, or designee,
to execute a contract with Kilowatt Engineering, Inc ., in an amount not
to exceed $500,000, to provide on-call electrical engineering services for
County distributed energy resources at various County sites and facilities
for the period February 1, 2025, through July 31, 2028, Countywide.
(100% General Fund)
25-376
approved
C.39
.
APPROVE and AUTHORIZE the Public Works Director, or designee,
to execute a contract amendment with Bay City Boiler and Engineering
Company, Incorporated, effective January 31, 2025, to extend the term
through January 31, 2027, with no change to the payment limit for
on-call boiler maintenance and repair services at various County sites
and facilities, Countywide. (No fiscal impact)
25-377
approved
C.40
.
APPROVE and AUTHORIZE the Public Works Director, or designee,
to execute a contract amendment with Silicon Valley Fire, Inc ., effective
January 31, 2025, to extend the term through January 31, 2027, with no
change to the payment limit for on-call fire extinguisher services at
various County sites and facilities, Countywide. (No fiscal impact)
25-378
approved
C.41
.
APPROVE the Vasco Road Safety Improvements Project and
AUTHORIZE the Public Works Director, or designee, to advertise the
Project, Byron area. (76% Highway Safety Improvement Program Funds,
24% Local Road Funds)
25-379
Attachments:CEQA Notice of Exemption
approved
C.42
.
APPROVE the Treat Boulevard Corridor Improvements Project and
AUTHORIZE the Public Works Director, or designee, to advertise the
25-380
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BOARD OF SUPERVISORS Meeting Minutes February 4, 2025
Project, Walnut Creek area. (23% State Transportation Improvement
Program Grant Funds, 46% Local Road Funds, 14% City of Walnut
Creek, 10% Former Redevelopment Agency, 7% Central County Area of
Benefit)
Attachments:CEQA Notice of Exemption
approved
C.43
.
APPROVE the Pacifica Avenue Safe Routes to School Project and
AUTHORIZE the Public Works Director, or designee, to advertise the
Project, Bay Point area. (80% Active Transportation Program Funds,
20% Local Road Funds)
25-381
Attachments:CEQA Notice of Exemption
approved
C.44
.
ACCEPT the Fiscal Year 2024–2025 Community Facilities District Tax
Administration Report on County of Contra Costa Community Facilities
District No. 2007-1 (Stormwater Management Facilities), as
recommended by the Public Works Director, Countywide. (100%
Community Facilities District No. 2007-1 Funds)
25-382
Attachments:2024-25 CFD Tax Administration Report
approved
C.45
.
Acting as the governing body of the Contra Costa County Flood Control
and Water Conservation District, APPROVE and AUTHORIZE the
Chief Engineer, or designee, to execute a contract amendment with GEI
Consultants, INC., effective February 4, 2025, to increase the payment
limit by $1,065,000 to a new payment limit of $2,065,000 and extend the
term through September 29, 2027, for on-call consulting services for
professional engineering and technical services related to flood control
facility design, Brentwood area. (100% Flood Control District Funds)
25-383
approved
C.46
.
AWARD and AUTHORIZE the Public Works Director, or designee, to
execute a construction contract in the amount of $1,090,000 with
American Civil Constructors West Coast LLC for the Pleasant Hill Road
Bridge Over Taylor Boulevard Preventative Maintenance Project,
Lafayette area. (43% Highway Bridge Program Funds, 57% Local Road
Funds)
25-384
Attachments:Attachment A - Valentine Ltr
Attachment B - Decision on Valentine Appeal
approved
C.47
.
AWARD and AUTHORIZE the Public Works Director, or designee, to
execute a construction contract with E. E. Gilbert Construction, Inc., in
the amount of $308,995 for the Tara Hills Curb Ramps on Shawn Drive
25-385
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BOARD OF SUPERVISORS Meeting Minutes February 4, 2025
Project, Tara Hills area. (89% Local Road Funds, 11% Transportation
Development Act Funds)
approved
C.48
.
ADOPT Resolution No. 2025-27 accepting as complete the contracted
work performed by CWS Construction Group, Inc. for the Miller
Wellness Center – Crisis Stabilization Unit Project, as recommended by
the Public Works Director, Martinez area. (No fiscal impact)
RES 2025-27
Attachments:Resolution of Acceptance NOC (1-29-25 DFS edits)
Signed Resolution No. 2025-27.pdf
adopted
C.49
.
APPROVE and AUTHORIZE the County Administrator, or designee, to
sign final Change Order No. 4 with CWS Construction Group, Inc. in the
amount of $123,734 to settle all claims from the Miller Wellness Center
– Crisis Stabilization Unit Project, Martinez area. (100% Mental Health
Realignment Funds)
25-386
Attachments:Settlement Change Order (2025-1-24) Signed.pdf
approved
Risk Management
C.50
.
RECEIVE report concerning the final settlement of James Steward vs .
Contra Costa County; and AUTHORIZE payment from the Workers'
Compensation Internal Service Fund in an amount not to exceed $75,000
as recommended by the Director of Risk Management. (100% Workers'
Compensation Internal Service Fund)
25-387
approved
C.51
.
DENY claims filed by Ricteisha Citizen; John Doe (A.B.); Gamaliel
Elizalde; James Hamner; Linnette Kidd; Kenneth Lightfoot; Vinod
Madhara; Pacific Gas and Electric Co.; Alejandro Plascencia; Subro
Claims Inc. obo Geico Ins. aso Fardeen Ahmed Syed; Joseph Sullivan;
and The Estate of Linda Wooldridge by & through Linnette Kidd .
25-388
approved
C.52
.
Acting as the governing board of the Contra Costa County Fire
Protection District, DENY claim filed by Adan Alberto Granados.
25-389
approved
Sheriff
C.53
.
APPROVE and AUTHORIZE the Purchasing Agent to execute, on
behalf of the Sheriff-Coroner, a purchase order with Magnet Forensics,
LLC, in an amount not to exceed $57,110 for the use of the GrayKey
software for digital forensic evidence processes of criminal cases, for the
period March 15, 2025 through March 14, 2026. (100% General Fund)
25-400
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BOARD OF SUPERVISORS Meeting Minutes February 4, 2025
approved
C.54
.
APPROVE and AUTHORIZE the Purchasing Agent to execute, on
behalf of the Office of the Sheriff, a purchase order with SPACEWORX,
in an amount not to exceed $10,000 for a Duramate modular
communication booth, for the period November 1, 2024 through October
31, 2025. (100% General Fund)
25-401
approved
C.55
.
APPROVE and AUTHORIZE the Purchasing Agent to execute, on
behalf of the Sheriff-Coroner, a purchase order amendment with
R-Computer, to increase the payment limit by $450,000 to a new
payment limit not to exceed $900,000 for the purchase of computer
hardware, peripherals, cameras, GPS units, and other computer-related
equipment and supplies, and to extend the term end date to June 30,
2027. (100% General Fund)
25-402
approved
C.56
.
APPROVE and AUTHORIZE the Purchasing Agent to execute, on
behalf of the Sheriff-Coroner, a purchase order amendment with
Caltronics Business Systems, to increase the amount by $201,000 to a
new total not to exceed $400,000, to provide managed print services and
multi-function device leases for the Office of the Sheriff, and to extend
the term end date to June 30, 2027. (100% General Fund)
25-403
approved
C.57
.
APPROVE Budget Amendment No. BDA-25-00009, authorizing new
revenue in the amount of $180,000 from County Law Enforcement
Capital Projects (0131) and appropriating it to Sheriff Marine Patrol
(2507) for the repair of the Sheriff's Office STARR I Helicopter turbine.
(100% Co Law Enf Cap Project)
25-409
Attachments:BDA-25-00009.pdf
approved
C.58
.
ACCEPT the Office of the Sheriff Inmate Welfare Fund (IWF) report, in
accordance with Penal Code Section 4025(e), on the accounting of all
IWF receipts and disbursements for Fiscal Year 2023/2024.
(No fiscal impact)
25-404
Attachments:IWF Rpt. of Receipts Disbursements etc FY 23-24
approved
Page 14 of 16
BOARD OF SUPERVISORS Meeting Minutes February 4, 2025
GENERAL INFORMATION
The Board meets in all its capacities pursuant to Ordinance Code Section 24-2.402.
Any disclosable public records related to an open session item on a regular meeting agenda and
distributed by the Clerk of the Board to a majority of the members of the Board of Supervisors less than
96 hours prior to that meeting are available for public inspection at 1025 Escobar Street, First Floor,
Martinez, CA 94553, during normal business hours.
All matters listed under CONSENT ITEMS are considered by the Board to be routine and will be
enacted by one motion. There will be no separate discussion of these items unless requested by a
member of the Board before the Board votes on the motion to adopt. Each member of the public will be
allowed two minutes to comment on the entire consent agenda .
Persons who wish to speak on matters set for PUBLIC HEARINGS will be heard when the Chair calls
for public testimony. Each speaker during public testimony will be limited to two minutes. After public
testimony, the hearing is closed and the matter is subject to discussion and action by the Board .
Comments on matters listed on the agenda or otherwise within the purview of the Board of Supervisors
can be submitted to the office of the Clerk of the Board via mail: Board of Supervisors, 1025 Escobar
Street, First Floor, Martinez, CA 94553 or to clerkoftheboard@cob.cccounty.us.
In the interest of facilitating the business of the Board, the total amount of time that a member of the
public may use in addressing the Board on all agenda items is 10 minutes.
Time limits for public speakers may be adjusted at the discretion of the Chair .
The County will provide reasonable accommodations for persons with disabilities planning to attend
Board meetings who contact the Clerk of the Board at least 24 hours before the meeting, at (925)
655-2000.
Anyone desiring to submit an inspirational thought nomination for inclusion on the Board Agenda may
contact the Office of the County Administrator or Office of the Clerk of the Board, 1025 Escobar Street,
Martinez, California.
Subscribe to receive to the weekly Board Agenda by calling the Office of the Clerk of the Board, (925)
655-2000 or using the County's on line subscription feature at the County’s Internet Web Page, where
agendas and supporting information may also be viewed:
www.contracosta.ca.gov
DISCLOSURE OF CAMPAIGN CONTRIBUTIONS
Pursuant to Government Code section 84308 (the Levine Act), members of the Board of Supervisors are
disqualified and not able to participate in any agenda item involving contracts (except for contracts
exempt from the Levine Act under Government Code section 84308(a)), franchises, discretionary land
use permits and other entitlements, if the Board member received, within the previous 12 months, more
than $500 in campaign contributions from the applicant or contractor, an agent of the applicant or
contractor, or any financially interested participant who actively supports or opposes the County’s
Page 15 of 16
BOARD OF SUPERVISORS Meeting Minutes February 4, 2025
decision on the agenda item. Members of the Board of Supervisors who have received, and applicants,
contractors or their agents who have made, campaign contributions totaling more than $500 to a Board
member within the previous 12 months are required to disclose that fact for the official record of the
subject proceeding. Disclosures must include the amount of the campaign contribution and identify the
recipient Board member, and may be made either in writing to the Clerk of the Board of Supervisors
before the subject hearing or by verbal disclosure at the time of the hearing .
BOARD OF SUPERVISORS STANDING COMMITTEES
For more information please visit the Board of Supervisors Standing Committees page here :
https://www.contracosta.ca.gov/8633/Board-of-Supervisors-Standing-Committees
Airport Committee: March 12, 2025 at 10:30 a.m.
Economic Development Committee: February 20, 2025 at 2:30 p.m.
Equity Committee: February 18, 2025 at 10:30 a.m.
Family and Human Services Committee: February 10, 2025 at 10:30 a.m.
Finance Committee: February 10, 2025 at 1:00 p.m.
Head Start Advisory Committee: March 17, 2025 at 9:00 a.m.
Internal Operations Committee: February 24, 2025 at 10:30 a.m.
Legislation Committee: February 24, 2025 at 9:00 a.m.
Los Medanos Healthcare Operations Committee: March 3, 2025 at 1:00 p.m.
Public Protection Committee: February 18, 2025 at 1:00 p.m.
Resilient Shoreline Committee: February 18, 2025 at 2:00 p.m.
Sustainability Committee: Special Meeting February 10, 2025 1:00 p.m.
Transportation, Water and Infrastructure Committee : February 24, 2025 at 1:00 p.m.
AGENDA DEADLINE: Thursday, 12 noon, 12 days before the Tuesday Board meetings.
Glossary of Acronyms, Abbreviations, and other Terms
Contra Costa County has a policy of making limited use of acronyms, abbreviations, and
industry-specific language in its Board of Supervisors meetings and written materials. For a list of
commonly used language that may appear in oral presentations and written materials associated with
Board meetings, please visit https://www.contracosta.ca.gov/8464/Glossary-of-Agenda-Acronyms.
Page 16 of 16
1025 ESCOBAR STREET
MARTINEZ, CA 94553CONTRA COSTA COUNTY
Legislation Details (With Text)
File #: Version:125-399 Name:
Status:Type:Discussion Item Agenda Ready
File created:In control:1/23/2025 BOARD OF SUPERVISORS
On agenda:Final action:2/4/2025
Title:RECEIVE presentation from the Contra Costa Budget Justice Coalition. (Sarah Gurdian, Program
Director, Budget Justice Coalition and Ryan Fukumori, Policy Link Senior Associate)
Attachments:1. Budget Justice Coalition Presentation, 2. Bay Area Equity Atlas
Action ByDate Action ResultVer.Tally
To:Board of Supervisors
From:Monica Nino, County Administrator
Report Title:RECEIVE presentation from the Contra Costa Budget Justice Coalition. (Sarah Gurdian,
Program Director, Budget Justice Coalition and Ryan Fukumori, Policy Link Senior Associate)
☐Recommendation of the County Administrator ☐ Recommendation of Board Committee
RECOMMENDATIONS:
RECEIVE presentations from the Contra Costa Budget Justice Coalition.
FISCAL IMPACT:
No fiscal impact. These presentations are for informational purposes only.
BACKGROUND:
The presentations are attached.
CONSEQUENCE OF NEGATIVE ACTION:
N/A
CONTRA COSTA COUNTY Printed on 4/4/2025Page 1 of 2
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CONTRA COSTA COUNTY Printed on 4/4/2025Page 2 of 2
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Looking Ahead at State & Federal Impacts
& The Need to Center Equitable Budget Processes
February 4,
2025
Sara Gurdian, Program Manager
Who We Are
Our Mission
Driven by a deep commitment to racial equity and economic justice, the Budget Justice
Coalition advocates for and demands a more transparent, inclusive, and participatory
budgeting process in Contra Costa County that centers and lifts community needs and
priorities.
State Impacts & Federal Threats
Healthcare Access & Medical
California’s health care system faces
significant challenges as the Trump
administration signals plans to cut
healthcare funding. Medi-Cal, accounts
for almost two-thirds (64.4%) of all
federal funding.
Housing
Housing programs already experienced deep cuts
totaling over $1 billion in the 2024 budget and this
year the administration proposes completely
abandoning any new state investments for housing.
Public Assistance
Reducing federal spending on
Temporary Assistance for Needy
Families (TANF), the federal-state
program generally described as
“welfare,” by 10%, to produce $15
billion in savings over a decade
Homelessness
California’s 2024 point-in time count showed
over 187,000 Californians experiencing
homelessness on a single night —with over
65% living in unsheltered spaces. No new
investments were made in this coming fiscal
year's budget.
Pitch deck title
Potential Impacts In Contra Costa
4
HEALTH SERVICES EMPLOYMENT & HUMAN
SERVICES
Safety Net Programs that support
child welfare, foster care,
CalWorks, and other critical
services that assist low-income
and vulnerable residents
IMMIGRANT
COMMUNITIES
Funding cuts could affect
the 235,000 Medi-Cal
enrollees through CCHP.
Contra Costa County is
known for its diverse and
flourishing residents, who
many may be impacted by
Federal threats
Contra Costa’s Shared Definition of Equity
Shared Definition of Equity
Equity means that each and every person receives what they need to achieve positive health and well -being and
nurture their full economic and social potential. We apply equity in our work when those most impacted by
structural inequity are meaningfully involved in the creation and implementation of the institutional policies and
practices that impact their lives.
Different from equality, equity accounts for the unique identities, circumstances, and histories of different people, as
well as the different and uneven experiences with institutions and systems, and considers those factors when
determining how resources are allocated and distributed.
Centering Equity
In Budget Development
The Contra Costa Budget Justice Coalition led efforts in developing
a County specific tool to help guide Departments identify gaps in
community investment, engagement and service performance.
In Partnership with The Office of Racial Equity and Social Justice, a
considerable amount of time and effort has been dedicated to the
development of the Budget Equity Tool by BJC, community
partners and County staff.
What is a Budget
Equity Tool(BET)?
7
WHAT IS THE TOOL?
This tool is composed of questions that guide departments to
integrate equity into their budgetary decision making process
HOW DOES IT WORK?
In this case, the ORESJ facilitates this process through the
development of this tool, training materials, and technical
assistance as well as reviewing and providing feedback on
Departments' completed tool.
WHY WE USE IT?
This tool encourages departments to identify and articulate the
equity impacts of their budget requests, with the goal of
promoting racial and economic equity.
The Budget is a MORALmoral
Document.
A set of values and principles that guide
decision-making. A key to considering how
those most impacted by the budget are affected
by our choices.
February 4, 2025
Ryan Fukumori, PhD, Senior Associate, PolicyLink
Assessing Residents’ Vulnerability:
A Sample of Data Snapshots
Contra Costa County Board of Supervisors
About the Bay Area Equity Atlas
●Launched in 2019
●Produced by the San Francisco Foundation, PolicyLink, and the USC
Equity Research Institute (ERI), with additional support from the Chan
Zuckerberg Initiative
●Tracks the state of equity across the nine -county region
○Actionable, disaggregated data
○25 equity metrics & 272 geographies
○Supports community nonprofits, public agencies, philanthropic
organizations, media outlets, and researchers
●Visit us at bayareaequityatlas.org
Data and Understanding Vulnerability
●Disaggregation:Breaking down the population (by geography, age,
race, etc.) to show how particular residents & groups are
disproportionately impacted by particular social/economic issues
●Interconnection:Demonstrating/projecting how harm to particular
populations can end up harming all community members
This presentation is just a sample of relevant data, not a comprehensive
analysis.
Prosperity and Precarity
Focusing on Families, Children, and Older Adults
Focusing on Families, Children, and Older Adults
Focusing on Families, Children, and Older Adults
Affordable Housing Crisis
Affordable Housing Crisis
Which Workers Live in the County?
Outmigration and Displacement
Vulnerability & Interconnection: Undocumented Residents
●Roughly one-quarter of county residents are immigrants, and an estimated 1
in 20 residents is undocumented.
●1 in 7 children in the county has at least 1 undocumented parent
●Undocumented workers in the county:
○Make up an estimated 7% of the local workforce, including 28% of
agricultural workers & 19% of construction workers
○Paid an estimated $349 million in federal, state, and local taxes in 2021
●Mass deportation can harm entire communities and industries
Vulnerability & Interconnection: Fire Risk
Much of the county’s housing
and economic development
lies within the Wildland-Urban
Interface (WUI, in orange).
Multiple fault lines also run
through these areas.
Growth in WUI areas can also
make communities more
vulnerable to climate change
or natural disasters.
Source: ArcGIS map (2019) produced with data from Spatial
Analysis For Conservation and Sustainability (SILVIS) Lab at the
University of Wisconsin-Madison
●Understanding communities requires data from multiple angles: entire
populations, specific communities and neighborhoods
●Integrating population-and market-level data with:
○Program-level data for county agencies
■Results-based planning & performance measures
■Track impact & lift up effective practices
○Community engagement & qualitative data
■Pursue alignment between resident needs & county priorities
■Less about scientific samples than commitment to engaging residents
Data Practices & Inclusive Governance
The Bay Area Equity Atlas uses IPUMS USA to source and analyze microdata from the
American Community Survey:
Steven Ruggles, Sarah Flood, Matthew Sobek, Daniel Backman, Annie Chen, Grace Cooper,
Stephanie Richards, Renae Rodgers, and Megan Schouweiler. IPUMS USA: Version 15.0
[dataset]. Minneapolis, MN: IPUMS, 2024. https://doi.org/10.18128/D010.V15.0
Attributions
http://bayareaequityatlas.org
ryan@policylink.org
1025 ESCOBAR STREET
MARTINEZ, CA 94553CONTRA COSTA COUNTY
Legislation Details (With Text)
File #: Version:125-408 Name:
Status:Type:Discussion Item Passed
File created:In control:12/18/2024 BOARD OF SUPERVISORS
On agenda:Final action:2/4/2025 2/4/2025
Title:CONSIDER reviewing and approving the Draft Request for Proposals for Exclusive Emergency
Ambulance Service in Contra Costa County Emergency Response Areas I, II, and V; and DIRECT the
Emergency Medical Services Agency, to finalize the Request for Proposals for submission to
California Emergency Medical Services Authority, as recommended by the Health Services Director.
(Marshall Bennett, Director of Emergency Medical Services)
Attachments:1. DRAFT--Contra Costa County CA RFP, 2. Contra Costa County, CA RFP Public Comment 25.1.pdf
Action ByDate Action ResultVer.Tally
approvedBOARD OF SUPERVISORS2/4/2025 1 Pass 4:0
To:Board of Supervisors
From:Anna Roth, Health Services Director
Report Title:Approve RFP for Exclusive Emergency Ambulance Services in ERAs I, II, and V
☒Recommendation of the County Administrator ☐ Recommendation of Board Committee
RECOMMENDATIONS:
APPROVE the Draft Request for Proposals (RFP) for Exclusive Emergency Ambulance Service in Contra
Costa County Emergency Response Areas (ERAs) I, II, and V; and
DIRECT the Emergency Medical Services (EMS) Agency, to finalize the RFP for submission to the California
Emergency Medical Services Authority (EMSA).
FISCAL IMPACT:
There is no fiscal impact for this action. This item is requesting review and approval of the draft RFP only.
BACKGROUND:
Contra Costa County Emergency Medical Services Agency, designated by the Board of Supervisors as the
Contra Costa County Local Emergency Medical Services Agency (LEMSA), is obligated to manage exclusive
emergency ambulance procurement process as prescribed by CA statute. The RFP for emergency ambulance is
informed by the EMS system evaluation conducted by FITCH and reported to the Board of Supervisors as part
of a 3-phase project including:
1.Evaluation of the current EMS system and present a final report to the Contra Costa County Board of
Supervisors.
2.Produce an RFP informed by phase I, and manage a competitive procurement process utilizing Contra
Costa County Public Works RFP process for emergency ambulance service in ERAs I, II, and V.
3.Assist in the establishment of an agreement with the selected bidder and the county of Contra Costa.
CONTRA COSTA COUNTY Printed on 4/4/2025Page 1 of 2
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File #:25-408,Version:1
Additionally, the RFP after review and approval by County Counsel has gone through a four (4) week public
comment period and all comments have been responded to with applicable edits made to the RFP document.
CONSEQUENCE OF NEGATIVE ACTION:
If this action is not approved, the procurement process will halt without approval of the Board to submit to
EMSA.
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0
PROPOSAL RELEASE DATE: [INSERT DATE HERE]
PROPOSALS DUE: [INSERT DATE HERE]
Reply electronically to this RFP via the Purchasing Services Division website at
https://purchasing.cccounty.us. no later than the date and time indicated above for the RFP
Response Deadline. Submittal by fax or email is not acceptable.
25-408 - DRAFT--CONTRA
COSTA COUNTY CA RFP
Exclusive Ambulance Services Provider
For the Contra Costa County, California,
Exclusive Operating Area
1
TABLE OF CONTENTS
SECTION 1 – INTRODUCTION.................................................................................................................... 4
1.1 PURPOSE ................................................................................................................................... 4
1.2 GOALS OF THE PROCUREMENT ............................................................................................. 4
1.3 BACKGROUND ........................................................................................................................... 5
1.4 OVERVIEW OF THE EMS SYSTEM ........................................................................................... 6
1.5 EMS SYSTEM OVERVIEW ......................................................................................................... 9
1.6 RELEVANT SERVICE AREA INFORMATION ........................................................................... 10
1.7 ANNUAL CONTRACT FEE ........................................................................................................ 12
1.8 TERMS AND EARNED EXTENSION ........................................................................................ 12
SECTION 2 – PROCUREMENT INFORMATION ....................................................................................... 13
2.1 PERFORMANCE-BASED CONTRACT .................................................................................... 13
2.2 ELIGIBLE APPLICANTS ............................................................................................................ 14
2.3 NOTICE TO PROPOSERS ........................................................................................................ 15
2.4 USE OF OWN EXPERTISE AND JUDGMENT .......................................................................... 16
2.5 FALSE OR MISLEADING STATEMENTS .................................................................................. 17
2.6 PROCUREMENT TIMELINE ..................................................................................................... 17
2.7 PROCUREMENT PROCESS .................................................................................................... 17
SECTION 3 – PROPOSAL INSTRUCTIONS ............................................................................................. 21
3.1 PROPOSAL FORMAT ............................................................................................................... 21
3.2 MINIMUM QUALIFICATIONS AND DOCUMENTATION OF CREDENTIALS ........................... 22
3.3 PROPOSAL EVALUATION PROCESS ..................................................................................... 26
3.4 PROPOSAL EVALUATION CRITERIA ...................................................................................... 30
SECTION 4 – SERVICE PLAN ................................................................................................................... 36
4.1 SELECTED PROPOSER’S FUNCTIONAL RESPONSIBILITIES ............................................. 36
4.2 SERVICES DESCRIPTION ....................................................................................................... 36
SECTION 5 – CLINICAL STANDARDS ..................................................................................................... 38
5.1 QUALITY MANAGEMENT PROGRAM ..................................................................................... 38
5.2 CLINICAL PERFORMANCE MEASUREMENT ......................................................................... 40
5.3 PENALTY PROVISIONS FOR CLINICAL PERFORMANCE ..................................................... 49
5.4 CLINICAL PERFORMANCE EXCEPTIONS .............................................................................. 50
5.5 PERSONNEL CERTIFICATION & TRAINING REQUIREMENTS ............................................. 51
5.6 CONTINUING EDUCATION PROGRAM REQUIREMENTS ..................................................... 52
5.7 MEDICAL REVIEW/AUDITS...................................................................................................... 52
5.8 DEDICATED PERSONNEL ....................................................................................................... 53
5.9 CLINICAL INNOVATIONS.......................................................................................................... 53
SECTION 6 – OPERATIONAL STANDARDS ............................................................................................ 54
6.1 DEPLOYMENT PLANNING ....................................................................................................... 54
6.2 AMBULANCE STAFFING REQUIREMENTS ............................................................................ 55
6.3 VEHICLES AND EQUIPMENT .................................................................................................. 56
6.4 COMMUNICATIONS SYSTEMS ............................................................................................... 59
6.5 TECHNOLOGY AND DATA MANAGEMENT............................................................................. 60
6.6 NON-CLINICAL TRAINING ....................................................................................................... 61
6.7 CRITICAL INCIDENT STRESS MANAGEMENT....................................................................... 62
6.8 TREATMENT OF INCUMBENT WORK FORCE ....................................................................... 62
6.9 DISASTER RESPONSE AND PREPAREDNESS ..................................................................... 63
6.10 STANDBY SERVICE .................................................................................................................. 64
SECTION 7 – RESPONSE TIME PERFORMANCE STANDARDS & PENALTIES .................................. 65
2
7.1 RESPONSE TIME PERFORMANCE, RELIABILITY & MEASUREMENT METHODS .............. 65
7.2 RESPONSE TIME PERFORMANCE REQUIREMENTS .......................................................... 65
7.3 EQUITY IN RESPONSE TIMES THROUGHOUT THE COUNTY AND REPORTING PERIOD 68
7.4 RESPONSE TIME MEASUREMENT METHODOLOGY ........................................................... 68
7.5 RESPONSE TIME REPORTING REQUIREMENTS ................................................................. 70
7.6 RESPONSE TIME EXCEPTIONS AND EXEMPTION REQUESTS .......................................... 71
7.7 PENALTY PROVISIONS FOR AMBULANCE RESPONSE TIME PERFORMANCE ................ 72
SECTION 8 – ADMINISTRATIVE STANDARDS ....................................................................................... 76
8.1 COMMUNITY ENGAGEMENT .................................................................................................. 76
8.2 PATIENT EXPERIENCE EVALUATION ..................................................................................... 77
8.3 CUSTOMER SERVICE HOTLINE AND COMPLAINT PROCESS ............................................ 77
8.4 EMPLOYEE SAFETY AND WELLNESS ................................................................................... 78
8.5 INTERNAL RISK MANAGEMENT PROGRAM REQUIREMENTS ............................................ 78
8.6 COMMUNICABLE DISEASES, SAFETY, AND PREVENTION ................................................. 79
8.7 KEY PERSONNEL ..................................................................................................................... 79
8.8 REPORTS REQUIRED .............................................................................................................. 81
SECTION 9 – REGULATORY COMPLIANCE AND FINANCIAL STANDARDS ...................................... 83
9.1 FEDERAL HEALTHCARE PROGRAM COMPLIANCE PROVISIONS ...................................... 83
9.2 STATE AND LOCAL REGULATIONS ........................................................................................ 83
9.3 PATIENT CHARGES AND REVENUE ....................................................................................... 84
9.4 BILLING/COLLECTION SERVICES .......................................................................................... 85
9.5 BILLING SYSTEM PROFESSIONALISM AND REGULATORY COMPLIANCE ....................... 85
9.6 ACCOUNTING PROCEDURES ................................................................................................ 85
9.7 INSURANCE PROVISIONS ...................................................................................................... 86
9.8 PERFORMANCE SECURITY .................................................................................................... 87
SECTION 10 – DEFAULT, TERMINATION AND OTHER GENERAL PROVISIONS ................................ 88
10.1 CONTINUOUS SERVICE DELIVERY ....................................................................................... 88
10.2 DEFAULT AND PROVISIONS FOR TERMINATION OF THE AGREEMENT ............................ 88
10.3 TERMINATION .......................................................................................................................... 89
10.4 EMERGENCY TAKEOVER ....................................................................................................... 90
10.5 TRANSITION PLANNING .......................................................................................................... 92
10.6 COUNTY’S REMEDIES ............................................................................................................. 92
10.7 "LAME DUCK" PROVISIONS .................................................................................................... 92
10.8 GENERAL REQUIREMENTS, ALLOWANCES, RESTRICTIONS ............................................ 93
SECTION 11 – SYSTEM INTEGRATION AND SYSTEM INNOVATION ................................................... 97
11.1 SYSTEM INTEGRATION ........................................................................................................... 97
11.2 SYSTEM INNOVATION ............................................................................................................. 97
SECTION 12 – APPENDICES .................................................................................................................... 99
12.1 DEFINITIONS ............................................................................................................................ 99
12.2 MAPS OF THE COUNTY ......................................................................................................... 107
12.3 CURRENT AMBULANCE SERVICE RATES ........................................................................... 109
12.4 MANDATORY FIRST PAGE FORM ......................................................................................... 110
12.5 FINANCIAL REVIEW FORM .................................................................................................... 111
12.6 PRICING FORM ...................................................................................................................... 112
12.7 CLINICAL SCORECARD ......................................................................................................... 113
12.8 SAMPLE PROPOSAL EVALUATION CRITERIA EXPLAINED................................................ 115
12.9 INTENT TO RESPOND ........................................................................................................... 119
12.10 INDEMNIFICATION AND INSURANCE REQUIREMENTS ................................................ 120
12.11 COMPENSATION PACKAGE FOR FIELD PERSONNEL ................................................... 125
12.12 MUTUAL AID AGREEMENT ............................................................................................... 129
12.13 PROVISION FOR FAIRNESS IN GOVERNMENT/ PRIVATE COMPETITION ................... 134
3
4
SECTION 1 – INTRODUCTION
1.1 PURPOSE
The County of Contra Costa, hereinafter referred to as “County,” and the County of
Contra Costa Public Health Department, acting as the Local Emergency Medical
Services Agency, hereinafter referred to as “LEMSA,” are soliciting proposals from
experienced and well-qualified organizations to deliver the services as specified within
this Request for Proposals (RFP), within the Contra Costa County Exclusive Operating
Area (EOA) consisting of Emergency Response Areas (ERAs) I, II, and V, as provided for
in Section 1797.224 of the California Health and Safety Code.
The Emergency Medical Services System and Prehospital Emergency Medical Care
Personnel Act (EMS Act), enacted by the legislature in 1980, created a comprehensive
statutory scheme governing the provision of prehospital emergency medical services for
the purpose of achieving statewide coordination and integration of prehospital
emergency medical services.
The EMS Act accomplishes this integration through a two-tiered system of state and
county regulation. At the state level, the Emergency Medical Services Authority (EMSA)
is responsible for functions relating to the coordination of EMS throughout the state. At
the county level, a designated local EMS Agency (LEMSA) is responsible for the
administration of emergency medical services and is required to have a Medical Director
responsible for medical control of the EMS System countywide.
Pursuant to California Health and Safety Code, Section 1797.200, the Contra Costa
County Board of Supervisors has designated the Department of Public Health’s
Emergency Medical Services (EMS) Agency as LEMSA for the County of Contra Costa .
In this role, LEMSA is charged with planning, implementing, evaluating, and regulating
the Contra Costa County EMS System. California Health and Safety Code, Section
1797.224 authorizes LEMSA, through a competitive procurement process, to create
EOAs for the provision of ambulance services.
Those from whom proposals are sought in this RFP will generally be referred to as
Contractor, Provider, Proposer, or similar terms (with or without capitalization).
1.2 GOALS OF THE PROCUREMENT
Ambulance service is one component for the provision of effective medical services in
the community. This RFP seeks proposals for emergency ambulance services and
Advanced Life Support (ALS) Interfacility Transport (IFT) for the County of Contra Costa.
Proposers are required to provide ALS level transport service to all patients and calls for
service unless Local EMS Policy provides for exceptions where Basic Life Support (BLS)
transport units may be utilized.
5
A successful emergency medical system has three key objectives: contri bute to the
prevention of disease, minimize morbidity and mortality due to injury and illness, and
provide high value care to the community.
The County of Contra Costa ’s goal is to sustain and further develop a high-quality EMS
System by ensuring Community Access & Education, Provider Safety & Support, and
Clinical Excellence.
Essential elements of this quality system include:
Community outreach and education
Bystander action and system access
Medical dispatch & pre-arrival instructions
First responder and ambulance dispatch
First responder services (ALS and BLS)
Transport ambulance services
Direct (on-line) medical control
Independent monitoring
Effective oversight and continuous quality improvement
The County has designed a comprehensive system that focuses on quality of care and
clinical proficiency. Response time measurement for contractual compliance is only one
element of EMS System performance. This model has been designed to ensure quality
clinical care, provide efficient and reliable EMS services at a reasonable cost to
consumers, and provide the community with an operationally and financially stable
system.
1.3 BACKGROUND
State statutes require the County to administer and oversee the EMS system through its
local Emergency Medical Services Agency. Contra Costa County Health Services
conducted a competitive RFP process from May - June 2022, for Consulting Services for
the Assessment of the County’s EMS System and for the Development and Management
of a Request for Proposal for Ambulance Services f or the next competitive cycle of
emergency ambulance provider selection for ERA’s I, II, and V. Specific areas of
emphasis included clinical quality, operational efficiency, technology utilization,
emergency medical dispatch, Medical Priority Dispatch System® use, response time
performance, response time standards, contract compliance and oversight, and system
revenues and expenses. Fitch & Associates was selected to conduct a three -phase
project that is projected to conclude before the current emergency ambulance contract
expires on December 31, 2025.
6
1.4 OVERVIEW OF THE EMS SYSTEM
OVERSIGHT AND GOVERNANCE
Consistent with the California Health & Safety Code, Division 2.5, Section 1797.200, the
Contra Costa County LEMSA was established in 1978 and is a part of Contra Costa
County’s Health Department. The EMS Director reports to the Deputy Director of Contra
Costa Health, responsible for Community Health Programs. The Deputy Director of
Contra Costa Health reports to the Director of Contra Costa Health, who reports to the
County’s CAO.
The LEMSA is comprised of two (2) basic functional areas: EMS Operations and Clinical
Systems. There are currently eight (8) Prehospital Care Coordinator staff, four (4)
administrative support staff, and one (1) EMS specialist contract employee as well as the
contracted Medical Director and retired annuitant MD serving the agenc y. LEMSA is
primarily funded by Contra Costa County Tax Measure H and also has some cost
recovery revenue streams.
SERVICE AREA
Current
As set forth in the LEMSA’s EMS Plan, the County is currently divided into five (5)
Emergency Response Areas (ERAs) as outlined on the Maps in Appendix 12.2. Only
ERAs I, II, and V are subject to this procurement.
ERA I: Serviced exclusively by Contra Costa County Fire Protection District as
part of an alliance service delivery model utilizing American Medical Response as
a subcontractor. ERA-I includes the cities of El Cerrito, Richmond, Pinole,
Hercules, San Pablo, Kensington, Martinez, Pleasant Hill, Lafayette, and Walnut
Creek west of Highway 680 and adjacent to unincorporated areas, excluding that
portion of ERA I included in the Moraga-Orinda Fire Protection District
ERA II: Serviced exclusively by Contra Costa County Fire Protection District as
part of an alliance service delivery model utilizing American Medical Response as
a subcontractor. ERA-II includes the cities of Clayton, Concord, Walnut Creek,
east of Highway 680 and adjacent to unincorporated areas.
ERA III: Serviced exclusively by Moraga-Orinda Fire Protection District. ERA-III
includes the territory of the Moraga-Orinda Fire Protection District. ERA III IS
NOT included in this procurement.
ERA IV: Serviced exclusively by the San Ramon Valley Fire Protection District.
ERA IV includes the territory of San Ramon Valley Fire Protection District. ERA IV
IS NOT included in this procurement.
ERA V: Serviced exclusively by Contra Costa County Fire Protection District as
part of an alliance service delivery model utilizing American Medical Response as
a subcontractor. ERA-V includes all of East County including the cities of
Pittsburg, Bay Point, Antioch, Brentwood and unincorporated areas along the 9 -1-
1 boundary line separating East from Central County.
Future
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For the purposes of this procurement, the service area will be defined as the entire
geographical area encompassed by ERAs I, II, and V.
DISPATCH
EMS and Fire Department resources in the County are dispatched by the following
Public Safety Answering Points (PSAPs) who are authorized Emergency Medical
Dispatch (EMD) providers:
Fire/Medical Dispatch Centers
Contra Costa County Fire Protection District
Richmond Police Department
San Ramon Valley Fire Protection District
FIRST RESPONSE
The County is served by the following agencies providing EMS and first response:
Contra Costa County Fire Protection District
El Cerrito Fire Department
Rodeo/Hercules Fire Protection District
Moraga/Orinda Fire Protection District
San Ramon Valley Fire Protection District
Richmond Fire Department
Crockett-Carquinez Fire Protection District
EMS
ERA I, II and V are served by Contra Costa County Fire Protection District
(CCCFPD) as part of an alliance service delivery model utilizing American Medical
Response (AMR) as a subcontractor.
ERA III is served by Moraga-Orinda Fire Protection District.
ERA IV is served by San Ramon Valley Fire Protection District.
MEDICAL CONTROL
Patient treatment and transport are carried out following local policies and procedures
that follow local and state laws and regulations. These policies may include, in the case
of paramedics, contacting a physician at a designated base hospital to obtain direction in
the clinical management of the patient. Patients are transported to the most appropriate
receiving facility. Hospital destination is based upon patient preference and LEMSA
policy. Non-critical patients may be transported to hospitals of choice within reasonable
travel time. Medical helicopter service is available to transport critical patients when
ground ambulance transport time would be excessive, and patient condition and/or
estimated transport time meets helicopter transport criteria, per LEMSA policy.
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RECEIVING FACILITIES
The following hospitals serve as receiving facilities in the County:
Contra Costa Regional Medical Center (CCRMC)
2500 Alhambra Avenue
Martinez, CA 94553
Main Phone: 925-370-5000
Website: http://cchealth.org/medical_center/
John Muir Health – Concord Campus (JMH-CC)
2540 East Street
Concord, CA 94520-1906
Main Phone: 925-682-8200
Website: http://www.johnmuirhealth.com/locations/john-muir-medical-center-
concord.html
John Muir Health – Walnut Creek Campus (JMH-WCC)
1601 Ygnacio Valley Road
Walnut Creek, CA 94598
Main Phone: 925-939-3000
Website: http://www.johnmuirhealth.com/locations/john-muir-medical-center-
walnut-creek.html
Kaiser Permanent Medical Center – Antioch (K-A)
4501 Sand Creek Road
Antioch, CA 94531
Main Phone: 925-813-6500
Website:
http://mydoctor.kaiserpermanente.org/ncal/facilities/region/diablo/area_master/dep
artments/antioch/
Kaiser Permanent Medical Center – Richmond (K-R)
901 Nevin Avenue
Richmond, CA 94801
Main Phone: 510-307-1500
Website:
http://mydoctor.kaiserpermanente.org/ncal/facilities/region/eastbay/area_master/a
bout_us/richmond/
Kaiser Permanent Medical Center – Walnut Creek (K-WC)
1425 S. Main Street
Walnut Creek, CA 94596
Main Phone: 925-295-4000
Website:
http://mydoctor.kaiserpermanente.org/ncal/facilities/region/diablo/area_master/dep
artments/walnut_creek/
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San Ramon Regional Medical Center (SRRMC)
6001 Norris Canyon Road
San Ramon, CA 94583
Main Phone: 925-275-9200
Website: http://www.sanramonmedctr.com/en-US/Pages/default.aspx
Sutter Delta Medical Center (SDMC)
3901 Lone Tree Wy 1st Floor
Antioch, CA 94509
Main Phone: (925) 779-7200
Website: https://www.sutterhealth.org/find-location/facility/sutter-delta-medical-
center-emergency-department
NO SUBSIDY SYSTEM
The Contra Costa County EMS System has operated for decades without subsidy to
ambulance providers. The ambulance service Proposer awarded the contract resulting
from this RFP must be able to continue to provide the required services, including the
significant system enhancements described below, without any subsidy from the County.
1.5 EMS SYSTEM OVERVIEW
The County supports an EMS System f ocused on patient outcomes, provider financial
stability, and quality training for all EMS providers.
EMERGENCY MEDICAL DISPATCH RESPONSIBILITY
The Contra Costa Regional Fire Communications Center (CCRFCC) operates the 9-1-1
system for nearly all fire, emergency, and medical calls County-wide and manages the
dispatch of first responders to some 141,000 fire and EMS incidents annually. The Fire
Agencies Dispatched by the Contra Costa Regional Fire Communications Center
(CCRFCC) include the Contra Costa County Fire Protection District, El-
Cerrito/Kensington Fire Department, Rodeo-Hercules Fire Protection District,
Crockett/Carquinez Fire Protection District, and Moraga/Orinda Fire Protection District.
All 9-1-1 call takers are certified as Emergency Medical Dispatchers by the International
Academies of Emergency Dispatch (IAED). This ensures reliable Emergency Medical
Dispatch (EMD) triage and accurate responses based on the patient’s complaints.
The Selected Proposer shall use a dispatch center that is authorized by the EMS Agency
to perform Emergency Medical Dispatch (EMD). This center must be accredited by the
International Academy of Emergency Medical Dispatch (IAED). The successful proposer
will either operate an accredited EMD center or contract with an existing accredited EMD
center with contractual assurance that the EMD center will maintain its accreditation with
IAED.
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DATA AND EDUCATION MANAGEMENT TOOLS
FirstWatch is LEMSA’s recognized third-party system data monitoring tool. The County
has procured a license for FirstWatch, FirstPass, Patient Centric View, Interactive
Dashboard View (IDV), and the Online Compliance Utility (OCU).
All LEMSA required continuing education will be distributed and tracked on a Learning
Management System (LMS) by all EMS providers in the County. The Selected Proposer
is responsible for any costs associated with procuring, integrating, and maintaining these
LMS systems, as well as ensuring LEMSA has “administrator level” access to view
Selected Proposer performance and compliance.
The LEMSA and the Selected Proposer shall cooperate in developing an annual fee to
support Contra Costa County Emergency Medical Services Information System
(CCCEMSIS) based on the Selected Proposer's total EMS response volume for the
prior calendar year. This amount shall not exceed sixty (60%) of the total cost for data
system management and vendor maintenance and support. All fees paid by the
Selected Proposer for data system management and vendor maintenance and support
shall be used for this purpose only. The LEMSA represents that this payment shall be
less than or equal to the LEMSA’s actual costs to provide CCCEMSIS and associated
information systems. No funds shall be used by the LEMSA in a manner that may violate
42 U.S.C. Section 1320a-7b, the federal Antikickback Statute.
CLINICAL METRICS AND PENALTIES
LEMSA’s goal is to provide a clinically sophisticated system that achieves contemporary
benchmarks of clinical excellence and can continue to do so in a sustainable fashion.
These system specifications are drawn from many reference sources but are generally
consistent with the direction provided in the EMS Agenda 2050.
To facilitate the routine and progressive oversight of the clinical aspects of the EMS
System, the LEMSA has developed clinical Key Performance Indicators (KPIs) and a
Clinical Scorecard. These will be used to assess clinical performance and apply
financial credits to any response penalties incurred by the successful proposer based on
provider clinical performance. The LEMSA may adjust the clinical scorecard and
associated performance benchmarks as new clinical research and other influencing
factors shape the most effective care practices and enhance the patient experience in
EMS.
1.6 RELEVANT SERVICE AREA INFORMATION
The County specifically makes no promises or guarantees concerning the number of
emergency and non-emergency calls or transports, quantities of patients, or distance of
transports that are associated with this procurement. Every effort has been made to
provide accurate information, but the Proposers are to use their professional judgment
and expertise to develop their economic and operational plans and proposals.
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HISTORICAL SERVICE VOLUME
The County call volume must be determined by any potential Selected Proposer.
Historical call volume data for the past five years is provided below. There has been no
independent validation of this data, and Proposers are encouraged to use their own
means to analyze the service to determine response and transport volumes. LEMSA
does not guarantee any number of responses or transports. Computer-Aided Dispatch
(CAD) data is available for
2019 – 2023 upon request.
Note: CAGR stands for Compound Annual Growth Rate
Category
Number of Responses
2017 2018 2019 2020 2021 2022
Responses 101,737 105,955 110,359 101,962 113,529 127,217
Calls per Day 278 290 302 278 311 348
Percent of
Transport 80% 79% 79% 76% 77% 77%
Year over Year (Percentage Difference)
2018 vs
2017
2019 vs
2018
2020 vs
2019
2021 vs
2020
2022 vs
2021 CAGR
7.40% 4.30% -11.30% 12.80% 13.10% 4.00%
12.70% 3.70% 6.20% 6.70% 8.70% 6.80%
8.50% 4.20% -7.60% 11.30% 12.10% 4.60%
HISTORICAL SERVICE MIX
Proposers should determine the county service mix. Historical service mix data
estimated based on reported service mix information for the past five years is provided
below. This data has not been independently validated, and Proposers are encouraged
to analyze the service to determine service mix volumes and percentages. The LEMSA
does not guarantee any number or percentage of transports for any level of service.
TRANSPORTS COMPL ETED (BILL ED) BY LEVEL OF SERV ICE
LEVEL OF SERVICE 20 19 2020 202 1 20 22
AL S EMERGENCY 63 ,847 5 6,76 4 6 0,0 72 60 ,27 4
BL S EMERGENCY 14 ,160 1 2,77 8 1 5,1 66 20 ,55 7
AL S 2 8 53 90 0 1 ,0 01 1,05 2
TOTAL 78 ,860 7 0,44 2 7 6,2 39 81 ,88 3
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HISTORICAL PAYER MIX
Any potential Selected Proposer must determine the county payer mix. Historical payer
mix data for the past five years is provided below. This data has not been independently
validated, and Proposers are encouraged to analyze the service to determine payer mix
volumes and percentages. LEMSA does not guarantee any number or percentage of
transports for payer classes. The data provided was estimated based on publicly
available information. The current EOA (ERAs I, II, V) provider is required to obtain
County approval for established transport rates. The current ambulance service rates
are included in Appendix 12.3.
1.7 ANNUAL CONTRACT FEE
As part of any contract awarded under this RFP, the Selected Proposer shall be required
to remit all required payments to the LEMSA. The Selected Proposer agrees to
reimburse the County for a portion of the costs associated with administration, medical
oversight, quality assurance and quality improvement processes, and regulatory
oversight of the Selected Proposer’s services under this Agreement. The Selected
Proposer shall reimburse Contra Costa County $1,250,000 annually. One-quarter of the
annual fee shall be due each fiscal quarter as follows: July 1, October 1, Janua ry 1, and
April 1.
1.8 TERMS AND EARNED EXTENSION
The Selected Proposer will be the sole authorized provider of emergency ambulance
services (as outlined within this RFP) for a five-year period beginning midnight January
1, 2026, through Midnight December 31, 2030, with an option to extend by mutual
agreement for a single extension period of five (5) years, not to exceed a total
contractual period of more than ten (10) years.
TRANSPORTS COMPL ETED (COLLECTED PAYMENT) BY LEV EL OF SERV ICE
LEVEL OF SERVICE 20 19 2020 202 1 20 22
AL S EMERGENCY 55 ,606 4 8,38 3 5 1,4 95 52 ,73 5
BL S EMERGENCY 11 ,128 9,9 58 1 2,3 17 16 ,49 5
AL S 2 6 70 68 3 7 96 86 3
TOTAL 67 ,404 5 9,02 4 6 4,6 08 70 ,09 3
TRANSPORTS COMPL ETED BY PAYOR
PAYOR 2 01 9 20 20 20 21 2 02 2
MEDICARE 4 5.2 %45 .1 %45 .3 %4 6.5%
MEDICAID 2 6.8 %25 .7 %25 .6 %2 6.7%
COMMERCIAL 1 4.1 %14 .2 %14 .1 %1 4.6%
PRIVATE PAY 1 2.5 %13 .9 %13 .9 %1 1.1%
FACILITY CONTRACTS 1 .4 %1 .2%1 .1%1.2 %
TOTAL 10 0.0%10 0.0 %10 0.0 %1 00 .0%
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SECTION 2 – PROCUREMENT INFORMATION
2.1 PERFORMANCE-BASED CONTRACT
This RFP is designed to result in the award of a performance-based Contract (also
referred to herein as Agreement). This RFP and its provisions, attachments,
addendums, and exhibits constitute a solicitation for the selection of a single provider of
ground emergency ambulance service f or the County EOA. The operation of an
emergency ambulance service shall be consistent with the provisions of this
procurement process including staffing and performance. This procurement process
includes provision for all ambulance responses.
The essential areas where performance must be achieved include:
Clinical performance consistent with approved medical standards and protocols
Clinical innovations
Comprehensive quality improvement and compliance activities and results
Ambulance deployment and staffing levels
Treatment of incumbent workforce
Data collection, management, and reporting
Ambulance response times
Customer and community education and engagement
Patient satisfaction with the services provided
Accurate and timely reporting
All transports originating in the County EOA shall be referred to the holder of the
exclusive Contract, who shall be responsible for all responses and ground transports:
Made in response to 9-1-1/ PSAP requests;
Made in response to requests for immediate emergency ambulance service
transmitted through an authorized 9-1-1/PSAP;
Made in response to requests for emergency ambulance service made directly to
the ambulance provider from a seven-digit telephone call without going through an
authorized 9-1-1/PSAP;
Made in response to any request for ALS interfacility transport from a healthcare
facility;
Requiring the presence of an ALS ambulance for “Standby Services”; and
The Selected Proposer’s scope of work is summarized as follows:
When the Selected Proposer receives a request for service from any of the PSAPs
located in the County, ambulance response times must meet the response time
standards outlined in this RFP. Every ambulance provided by the Selected Proposer for
emergency response must always, except as authorized by the Agreement, be equipped
and staffed to operate at the appropriate level on all ambulance responses, including
emergency and non-emergency services. Clinical performance must be consistent with
approved medical standards and protocols. The conduct and appearance of the Selected
Proposer’s personnel must always be professional and courteous. Patient transportation
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and disposition will be according to the County’s Policies and Procedures as established
or approved in the Selected Proposer’s proposal and as developed or promulgated as
part of this RFP
Services and care delivered must be evaluated by the Selected Proposer’s internal
quality improvement program and as necessary, through the County’s quality
improvement program in order to improve and maintain effective clinical performance.
The Selected Proposer must make continuous efforts to detect and correct clinical and
other performance deficiencies and to ceaselessly upgrade the performance and
reliability of the EMS system. Clinical and response-time performance must be
extremely reliable, with equipment failure and human error held to an absolute minimum
through constant attention to performance, protocol, procedure, performance auditing,
and prompt and definitive corrective action.
The Agreement is not a level-of-effort agreement. The successful Proposer must employ
whatever level of effort is necessary to achieve the clinical, response time, customer
satisfaction, quality improvement, and other performance results required and as
detailed in this RFP. The Selected Proposer’s failure to achieve the performance
standards set forth in the RFP and resulting Contract will result in the assessment of
penalties, as set forth herein, and may result in LEMSA’s termination of the Contract.
2.2 ELIGIBLE APPLICANTS
The County welcomes proposals from all interested parties that meet the minimum
requirements defined herein. The County will contract with a single entity to provide
these services. Each Proposer is required to submit a proposal describing their
Proposer's qualifications to provide emergency ambulance service and plans to meet or
exceed the performance standards identified in this RFP. The performance expectations
outlined in this RFP and the performance commitments made by the P roposer in the
selected proposal will be incorporated in the Agreement as mandatory performance
standards.
INDEPENDENT CONTRACTOR
It is expressly understood that in the performance of any services resulting from this
proposal, Proposer is an Independent Contractor and is not an agent or employee of the
County and warrants that all persons assigned to the project are employees or
subcontractors of the Proposer. In the event the awarded Proposer shall employ others
to complete or perform the services provided, the Proposer shall be solely responsible
and hold the County harmless from all matters relating to the payment of such person(s).
It is mutually understood and agreed that no employee-employer relationship will be
created between the County and the Proposer or County and Proposer’s employees,
and that the awarded Proposer shall hold the County harmless and be solely responsible
for withholding, reporting, and payment of any federal, state, or local taxes, contributions
or premiums imposed or required by workers' compensation, unemployment insurance,
15
social security, income tax or other statutes or codes applying to the Proposer, or its
Subcontractor(S) and employees, if any. It is mutually agreed and understood that the
Proposer, its Subcontractor(s), and employees, if any, shall have no claim under
any Agreement that may result from this proposal or otherwise against the County for
vacation pay, sick leave, retirement or social security benefits, occupational or non -
occupational injury, disability or illness, or loss of life or income, by whatever cause.
SUBCONTRACTORS
Any Proposer using a subcontractor(s) must clearly explain the use of the
subcontractor(s) and list the name(s) of the subcontractor(s) providing work under this
proposal. The Selected Proposer intending to utilize a subcontractor to provide
contracted services will be solely responsible for meeting the terms of the contract.
Nothing herein would preclude a public-private partnership, which, under these
specifications, would be viewed as a contractor-subcontractor relationship. Any
subcontract entered into by the Proposer is the sole responsibility of the Proposer. Any
contract between the Selected Proposer and the subcontractor(s) shall contain
provisions for federal, state, and local access to the books, documents, records, and
inspection of work to the same extent as Proposer is required to provide such access
under the Agreement. Proposer awarded any Agreement as a result of this proposal
shall obtain County written approval of subcontractors identified in Proposer submittal
before execution of Agreement.
2.3 NOTICE TO PROPOSERS
This Request for Proposal does not commit Contra Costa County to award a contract,
pay the costs incurred in preparing a Proposal responding to this request, or procure a
contract for service. The LEMSA reserves the right to waive any immaterial informality in
the Proposals and any minor irregularity in the submission.
RIGHTS TO MODIFY
The LEMSA reserves the right to modify the RFP as needed, including after it is issued.
The Board of Supervisors reserves the right to cancel the Request for Proposal in part or
its entirety if it is in the best interests of the County to do so and to accept or reject
LEMSA’s recommendation.
COUNTY DISCUSSIONS AND CLARIFICATIONS
The County may also require the Selected Proposers to participate in negotiations
concerning qualifications, the proposed method of performance, personnel and facilities,
compensation, contract costs, rates, or the nature and extent of services to be provided.
This process helps to resolve any questions regarding the solicitation requirements and
ensure a full understanding of and responsiveness to them.
16
County may permit Proposers after the submission of responses and before the award to
cure any deficiency resulting from a minor informality or irregularity in a proposal or
waive such deficiency, whichever is to the advantage of the County. In conducting
discussions, there shall be no disclosure of any information derived from responses
submitted by competing bidders to anyone outside the Proposal Evaluation Panel and
County staff. All Proposers submitting responses for consideration agree that they will
be willing to enter into a final Agreement if awarded this RFP. The County may, in its sole
discretion, negotiate certain non-material terms and conditions of such final Agreement
after identification of the apparent successful Proposer. However, the Proposer should
not assume that any terms of this RFP or other applicable terms and conditions are
subject to later negotiation and should instead assume that all such terms and conditions
are mandatory conditions of participation in this RFP process.
RFP INTERPRETATION
The Proposer must carefully examine the specifications, terms, and conditions
expressed in the RFP and become fully informed of the requirements. Those desiring to
respond to the RFP that object to any requirements must raise those objections in writing
and in a timely fashion in accordance with the provisions of the RFP. If Proposers
discover any ambiguity, conflict, discrepancy, omission, or error in the proposal has any
questions regarding the requirements or any other related matters, they shall
immediately notify the contact person listed in this RFP of such concern in writing and
request clarification or modification of the document(s) no later than the Written Question
deadline. No further requests for clarification or objections to the RFP will be accepted
or considered after this date. Any change in the RFP will be made only by a written
addendum issued by the -Purchasing Services Division and posted on the county
website and shall be incorporated into the proposal.
COST RECOVERY FEE
Upon execution of service contract with the County, the successful Proposal/Selected
Proposer shall pay a one-time RFP Cost Recovery Charge not to exceed $199,000.00.
Only actual costs will be recovered.
2.4 USE OF OWN EXPERTISE AND JUDGMENT
Each Proposer is specifically advised to use its own best expertise and judgment in
deciding on the methods to be employed to achieve and maintain the performance
required under the resulting Contract. By “methods”, LEMSA means compensation
programs, shift schedules, personnel policies, asset acquisition, supervisory structure,
deployment plans, and other business matters that comprise the organization ’s
strategies and activities. The successful proposer shall be responsible for all aspects of
operational implementation, operational management, and operational performance.
Conversely, the LEMSA is not responsible for management of the Selected Proposer’s
operation, the LEMSA is responsible for management and enforcement of the service
contract. The County specifically makes no promises or guarantees concerning the
17
number of emergency and non-emergency calls or transports, quantities of patients, or
distance of transports associated with this procurement.
2.5 FALSE OR MISLEADING STATEMENTS
Responses that contain false or misleading statements or that provide references that do
not support an attribute or condition claimed by the Proposer will be rejected, subject to
the County’s ability to waive minor irregularities.
2.6 PROCUREMENT TIMELINE
The expected procurement schedule is listed below. The County reserves the right to
change this schedule. At the discretion of LEMSA, if a change in the Procurement
Timeline occurs, the County will notify Proposers through email and via addendum in this
RFP and posted on the County website.
Date Activity
Insert Date County releases RFP on the County website
Insert Date Letter of Intent due to the County, via Purchasing Services
Division Website
Insert Date Written questions due to the County, via Purchasing
Services Division Website
Insert Date Proposers’ conference
Insert Date County answers Written RFP Questions via RFP
addendum on Purchasing Services Division website
Insert Date
Deadline for interested Proposers to formally respond with
a responsive Proposal to the County through Purchasing
Services Division website
Insert Date Oral Presentations and Proposal review process
Insert Date Intent to award announced and negotiation process
initiated
Insert Date Contract presented BOS
Insert Date New Contract takes effect
2.7 PROCUREMENT PROCESS
LETTER OF INTENT
The Letter of Intent must be submitted by no later than the date listed in the Procurement
Timeline.
QUESTIONS AND COMMENTS
The County will accept written questions for clarification on this RFP within the
Purchasing Services Division website at https://www.contracosta.ca.gov/7668/Requests-
18
for-Qualifications-and-Proposal. Questions must be submitted no later than the date
listed in the Procurement Timeline. The County will publish answers to the questions in
an addendum to the RFP on the date listed in the Procurement Timeline.
QUESTION SUBMITTAL INSTRUCTIONS:
Click on the title of the RFP.
On the right of the bid page, click on [View/Ask Questions] to open a new page
that lists all previous questions and answers.
Click "Ask a Question" and enter your question.
REQUEST FOR CHANGES
Proposals may be changed or withdrawn prior to the deadline for Proposals. All such
changes and withdrawals must be submitted in writing and received by the County prior
to the deadline for Proposals. After the deadline for Proposals, no change in prices or
other provisions prejudicial to the interest of the County or fair competition shall be
permitted.
CANCELING THE PROCUREMENT PROCESS
The LEMSA may cancel, revise, or reissue this solicitation, in whole or in part, when the
cancellation is in the best interest of the County or for any other reason including, but not
limited to:
The services are no longer required.
All otherwise acceptable Proposals received are at unreasonable prices.
The Proposals were not independently arrived at in open competition, were
collusive, or were submitted in bad faith.
The Proposals received were not adequately competitive and, therefore, did not
ensure reasonable prices in accordance with local resources or generally
accepted prices.
No Proposal is received that meets the minimum requirements of the RFP.
LEMSA determines after analysis of the Proposals that its needs can be satisfied
by a less expensive method.
All Proposers shall be notified in writing of the specific reasons when Proposals are
rejected.
MANDATORY PROPOSERS’ CONFERENCE
A mandatory Proposers’ Conference will be held at 777 Arnold Drive, Martinez, CA
94553 at the time specified in the Procurement Timeline to answer questions regarding
the RFP specifications and process. All entities that have submitted a Letter of Intent
must attend. All written material received from potential Proposers and any related
LEMSA responses will be distributed to all attendees of the Proposers ’ conference. Any
changes or clarifications to the Request for Proposal made following the Proposers’
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Conference will be distributed to all potential Proposers who attend the Proposers ’
Conference or who have indicated in writing their intent to submit a Proposal.
CONTACT WITH COUNTY EMPLOYEES
All questions or comments for LEMSA regarding the RFP should be directed to the
Purchasing Services Division listed on the Cover Page of this RFP. All questions must
be in a written format and submitted via the Purchasing Services Division website at
https://purchasing.cccounty.us. Only written communications responded to by a county
representative may be considered valid. Proposers may not consider any oral instruction
as official instruction. For other requirements for vendor questions and the deadline for
submitting questions, refer to the Procurement Timeline detailed in the RFP.
PROPOSAL SUBMISSION
Proposals must be submitted by 2:00 PM (PST) on the date listed in the Procurement
Timeline. In the interest of fairness to all participants, no extensions or exceptions will be
permitted, and hard-copy submissions will not be accepted. Please note that a “Cone of
Silence” is applied once the RFP is released. This means that any lobbying or marketing
activities to County Officials by a particular respondent or its representatives must cease
from the moment the solicitation is released until the time the Board Letter
recommending approval of the final contract by the County Board of Supervisors is
posted.
Proposers submitting an RFP must first register on the County’s Purchasing Services
Division website at https://purchasing.cccounty.us. Successful registration will allow
Proposers to receive updates to the bid process and to upload final Proposal packages.
Hard-copy submissions will not be accepted. Proposers are recommended to register as
a Supplier as soon as possible – it can take 24 to 48 hours for your account to become
active. To register as a Supplier, follow the steps below:
To ensure receipt of notifications about Bid opportunities or to be issued Purchase
Orders (POs) through the Purchasing Portal, you must make sure your information is
current within the system. You can do this by accessing the Purchasing Portal login
screen and signing in with your unique Login ID and Password. You can refer to the
email you were sent upon completion of registration or by using the link
https://purchasing.cccounty.us. The Purchasing Portal can also be accessed through the
County’s website at www.cccounty.us. The Purchasing Services page is located under
the Business tab at the top menu.
RFP OPENING
On the date and time specified in this RFP, all replies will be opened. Within two (2)
business days, a bid opening summary will be posted on the Public Purchase website.
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ADDITIONAL PROPOSER RESPONSIBILITIES
Proposers may be requested to provide additional information, documentation, or a
formal oral presentation to the Proposal Review Panel. The Proposer must fulfill such
requests, or their Proposal may be rejected.
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SECTION 3 – PROPOSAL INSTRUCTIONS
3.1 PROPOSAL FORMAT
This section describes the required proposal format and content. The response should
contain the requested information organized by the prescribed section and subsection
numbers and titles.
Each Proposer shall submit a complete response, along with requested copies, providing
all information requested and a complete description of the functional operation of the
program/project proposed. Failure to follow the prescribed format may result in rejection
of the response.
Responses must be complete in all aspects. The response must contain all costs
required by the proposal. Responses must be marked as described in this RFP and
received by the specified date and time. A response may be rejected if:
The response is conditional or incomplete or contains any alteration of form or
other irregularities.
Any defect or irregularity constitutes a material deviation from the proposal
requirements.
The response is submitted under improperly marked covers.
If discrepancies are found between two or more copies of the response.
However, if not so dismissed, the original response will provide the basis for
resolving such discrepancies.
The response must be typed. Every part of the response must be legible. Attachments
not included in the binder should be clearly labeled according to the sections and titles
provided. The proposal should be clear, complete, and consistent with the proposal
content requirements.
The LEMSA intends to ensure that all Proposals are concise and directly respond to the
required information in this RFP. In order to facilitate the evaluation process, Proposals
shall be limited in size. The following requirements shall be adhered to:
The narrative portion of the Proposal shall be limited to one hundred (100) pages,
excluding title pages, dividers, and table contents pages.
The narrative portion will adhere to the following specifications:
o Easily readable font, no smaller than 11 point
o Line spacing no smaller than 1 ½ lines
o Standard 8 ½” by 11” paper
o Pages must be numbered sequentially
The Purchasing Services Division utilizes a web-based eProcurement Purchasing Portal
to post bid notifications and transmit bid solicitations. The exhibits shall be submitted as
a separately titled file at https://purchasing.cccounty.us. Each exhibit shall be labeled and
referenced in the narrative. Proposers are strongly encouraged not to provide
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extraneous materials in their exhibits and to use them to illustrate the features of their
Proposal and expertise in providing service.
Proposers shall submit all financial documents and proposed ambulance rates in a
separately titled file on the at https://purchasing.cccounty.us. Financial elements and
proposed ambulance rates shall not be mentioned in any other section of the Proposal.
The ambulance transport rates shall be evaluated separately from the main body of the
Proposal.
MANDATORY TABLE OF CONTENTS
Proposals shall be written to respond to evaluation criteria directly and must adhere to
the mandatory Table of Contents, as detailed in this RFP.
Proposals shall incorporate all information requested in this RFP in the order that it is
requested. Proposers may elect to use reference "exhibits" or "attachments" in the
Proposal to provide additional detail. Any exhibits or attachments should be incorporated
into a supplemental "reference document," which is to be in a separate binder from the
narrative of the Proposal.
Each Proposal must contain all required forms located in the Appendices of this RFP.
The first page of the RFP is to include the Mandatory First Page Form in Appendix 12.4.
3.2 MINIMUM QUALIFICATIONS AND DOCUMENTATION OF
CREDENTIALS
Proposals not meeting the minimum qualifications shall be disqualified. To qualify for an
evaluation by the Proposal Review Committee, a Proposer must meet the Proposal
Minimum Qualifications outlined in this RFP.
The LEMSA shall entertain Proposals only from organizations demonstrating fiscal
stability and prudence, as well as a stable track record of rendering emergency, non -
emergency, and urgent ambulance services at levels of clinical quality and response time
reliability substantially equivalent to the services required under this procurement. Any
Proposer lacking experience in the provision of required services poses a risk to the
health and safety of the citizens and visitors that is unacceptable to the County.
Therefore, all interested Proposers are required to meet minimum qualifications as a part
of their RFP response.
Proposers’ credentials will be evaluated based upon objective criteria designed to
demonstrate each Proposer’s ability to perform if awarded the Contract.
Credentials shall be submitted as “Credentials” and will be scored on a pass/fail basis.
Only Proposals that meet the minimum experience requirements as described herein will
receive further consideration.
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Proposers must provide the required information for every entity that will provide any
service under the Contract, if awarded, including for any joint venturers and
subcontractors.
Organizations that have multiple operational service areas or whose parent companies
have multiple operational service areas may use information from any site to establish
qualifications; however, information represented that does not reflect the experience of
the operational site responsible for the Proposal shall be so noted.
There are four key areas in which minimum qualifications must be established:
1. Experience in managing a high-performance Emergency Ambulance Service.
2. Response time performance.
3. Financial depth and stability; and
4. Ability to comply with regulatory provisions.
Proposers shall provide the following:
EXPERIENCE MANAGING A HIGH-PERFORMANCE EMERGENCY
AMBULANCE SERVICE.
The Proposer shall provide evidence that clearly demonstrates that it has experience
managing an emergency 9-1-1 ALS ambulance service. Information provided should
include:
A list of communities in which the service is operated.
Name(s) and contact number(s) of LEMSA Administrator (or equivalent) and
contract officer(s) or designated governmental contact person.
The number of responses provided in each of the past two years.
A brief description of the community and service provided.
Proposer shall disclose any municipal contract that was terminated for cause
and/or was ended by agreement before the full term. A summary of the
circumstances shall be provided as part of the credential submission.
The Proposer shall document existing sophisticated internal management systems and
programs that facilitate the management of its service. This information shall include
brief descriptions of operational programs including, but not limited to:
Clinical training and QI processes.
EMS System Response Management.
Quality assurance and quality improvement.
Recruitment and retention activity.
Risk management and driver training procedures.
Current deficiencies/planned solutions.
The Proposer shall provide information and documentation of existing management and
supervisory strength (including senior management’s involvement in operations) in order
to demonstrate the organization’s ability to manage the service as well as plan for
continuity or redundancy should leadership vacate. The information provided should be
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in the form of names and resumes of existing management and supervisory personnel
directly responsible for administering that service. The Proposer must include its
experience with flexible deployment practices and information about the steps, policies,
procedures, training, equipment, and management techniques that would be utilized
upon award of the Contract. The Proposer must include a detailed quality assurance
and quality improvement program for its deployment, system status management, and
EMS system status plan.
RESPONSE TIME PERFORMANCE
The Proposer shall demonstrate their ability to comply with response times by
documenting experience in operating and managing an ambulance service that is required
to comply with specified emergency response times based upon fractal compliance.
Documentation shall include:
A copy of the contract language, regulations, and/or ordinances that require
compliance.
The service’s response time performance for the most recent twenty-four (24)
months for which information is available. The following format is to be utilized for
each of the months and years:
Service Area Name
Priority Category January February March
Priority - 1 (Life-Threatening
Emergent)
Responses
Response Time
Compliance % % %
Priority - 2 (Non-Life-
Threatening Emergent)
Responses
Response Time
Compliance % % %
Priority - 3 (Non-Life-
Threatening Non-Emergent)
Responses
Response Time
Compliance % % %
FINANCIAL DEPTH AND STABILITY
The Proposer shall provide evidence that clearly documents the financial history of the
organization and demonstrates that it has the financial capability to handle the expansion
(including implementation and start-up costs) necessitated by the award of the Contract.
Documentation shall include:
Copies of its audited financial statements for the most recent three-year period.
Note that audited financial statements are required.
If the Proposer’s parent entity has changed corporate structures due to an
acquisition or divestiture in the past three years and three years of financials
cannot be documented, then each should clearly outline the manner in which they
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are documenting operational credentials and financial capacity to perform and the
organizational transaction. If consolidated financial statements are utilized, the
individual program unit’s financial statements must be separately shown.
If the Proposer is part of a larger organization, it shall furnish the financial
statements of the parent entity. Such a parent entity shall be required to
guarantee the performance of the Proposer.
If the Proposer is a government entity it must also comply with the provisions of
the Provision for Fairness in Government/Private Competition document located
in Appendix 12.13.
A current ratio greater than or equal to 1.30. The current ratio is defined as
current assets divided by current liabilities.
Access to sufficient working capital to provide for implementation and start-up of
operations. The minimum amount shall be $2,500,000. Working capital is defined
as current assets less current liabilities.
Total share/unitholder(s) or owner(s) equity to cover at least three months of
operations. The minimum amount is $5,000,000.
If the purchase of capital assets (e.g., ambulances, major biomedical equipment)
is required to provide services as described here within, then the Proposer shall
submit a recently obtained quote (within 60 calendar days prior to Proposal
submission). The estimated delivery timeline must be included as a part of the
quote.
COMPLIANCE WITH REGULATORY PROVISIONS
The Proposer and any subcontractors shall detail any and all regulatory agency
investigations, findings, actions, or complaints and their respective resolutions in
which it or its parent or affiliated entities (if any) have been involved for the past five
(5) years.
The Proposer shall summarize any other litigation in which the Proposer or its
parent (if any), and all affiliates, is or have been involved or which is pending, with
a description of the nature of the incident (e.g., auto, med -mal, HR claim, etc.),
date, amount of claim or reserved amount, and current status of the claim for the
past five (5) years.
The Proposer, its parent (if any), and affiliated entities shall provide evidence that
it has never been excluded, debarred, or otherwise suspended from participation
in any state or federal healthcare program, including but not limited to Medicare or
Medicaid, and that the Proposer and its parent (if any) currently qualifies for
participation in such programs and currently has no employees who have been
excluded, disbarred or otherwise suspended from participation in such programs.
The Proposer shall provide evidence that clearly demonstrates expertise in
documenting medical care in electronic patient care reporting systems.
The Proposer shall provide to the County’s legal counsel any other information
said legal counsel may request regarding any regulatory requests, investigations,
or litigation.
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The Proposer shall describe the training required of field personnel that directly
relates to supporting billing practices that are compliant with Medicare and
Medicaid guidelines.
The Proposer shall describe the methodology for monitoring and maintaining
compliance with Health Insurance Portability and Accountability Act (HIPAA)
regulations, how improvements are identified in this area, and actions taken to
implement procedures to address those improvements.
The Proposer shall describe their current Compliance Program and methods used
to keep current on all applicable rule and regulation changes, including but not
limited to California EMS Act, California Code of Regulations Title 22, and local
County EMS Ordinance.
3.3 PROPOSAL EVALUATION PROCESS
The County’s Purchasing Services Division will facilitate the procurement process,
supported by the LEMSA and its consultants.
PROPOSAL EVALUATION PANEL
A multi-disciplinary Proposal Evaluation Panel, approved by the County, will be
empaneled to evaluate and rank all Proposals received in response to this RFP.
Meetings of the Proposal Evaluation Panel will be closed to the public. The Proposal
Evaluation Panel rankings and recommendations will be submitted to the Director of
Health Services, who will make a final recommendation to the Board of Supervisors.
Proposals will be evaluated by the Proposal Review Panel, which will include the
following five (5) members and two (2) non-scoring (observer) members:
One (1) EMS physician or other specialty knowledgeable of EMS best practices
(Not affiliated with, employed by, or under contract with Contra Costa County or
any healthcare facility within Contra Costa County).
Two (2) individuals experienced in high-performance EMS System design and
service (Not affiliated with, employed by, or under contract with Contra Costa
County).
Two (2) designated community leaders representing geographic diversity (West,
Central, or East) that demonstrate innovation and best practices in operational
excellence in local businesses, institutions, or other organizations, such as
academia, a major local industry, etc. (Not affiliated with, employed by, or under
contract with Contra Costa County).
Two (2) non-scoring observers to be present for all group-scoring panel activities,
including proposer oral presentations and any deliberations between panel
members’ designated community leaders representing geographic diversity (West,
Central, or East) that demonstrate innovation and best practices in operational
excellence in local businesses, institutions, or other organizations, such as
academia, a major local industry, etc. (Not affiliated with, employed by, or under
contract with Contra Costa County).
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The Proposer, by submission of a response to this RFP, acknowled ges that the EMS,
public safety, and healthcare consulting firm, Fitch & Associates, LLC (FITCH), has
assisted the LEMSA in the development of this RFP and has also worked with numerous
other government and private agencies. FITCH warranted to the LEMSA and the County
that it does not represent any entity for the purpose of doing business with the County,
nor has it received, given, or exchanged any item of value with any individual or entity
with regard to its involvement in this procurement process. Proposers stipulate that
FITCH’s prior, current, and future relationships with the County, other cities, counties,
and other ambulance organizations do not represent a conflict, cause for protest, or legal
challenge of this procurement process.
INVESTIGATION
Upon completion of Proposal Evaluation Panel evaluations, the LEMSA and County staff
may undertake an additional investigation to verify claims made by the recommended
Proposer during the Proposal evaluation process. Such additional investigation may
involve site visits, reference checks, financial inquiries, or any other reasonable means of
determining the accuracy and completeness of information supplied by the Proposer.
Proposers are advised that LEMSA reserves the right to continue investigating cla ims
after the contract award and throughout the contract term and that furnishing false or
misleading information during the Proposal process may constitute a material breach of
contract even if discovered after the contract award.
PROPOSAL EVALUATION PROCESS
The Proposal evaluation process Includes the Following Steps:
Each reviewer will be provided a copy of each responding organization’s Proposal
and written instructions concerning scoring.
Each reviewer will be expected to read and independently score each Proposal
before the convening of the Proposal Evaluation Panel.
Each reviewer will submit any questions of the Proposer(s) to the Proposal
Evaluation Panel Coordinator.
These questions will be presented in an aggregate , anonymous manner to each
Proposer in the Oral Presentations. The Proposal Evaluation Panel may ask
additional questions during the Oral Presentations.
Following the Oral Presentations, the Proposal Evaluation Panel members may
adjust (up or down) their final Proposal evaluation by no more than one (1)
scoring level. For example, a Proposal Evaluation Panel member may adjust their
score from Exceptional to Good or Unsatisfactory to Acceptable.
After Oral Presentations and any scoring adjustments by the Proposal Evaluation
Panel, the points awarded by each reviewer will be totaled by section, and then
the overall points will be calculated (total by each reviewer, by section).
County staff, consultants, and legal advisors shall not serve as members of the Proposal
Review Panel, nor shall they score the Proposals. The consultants will serve only as
facilitators in the evaluation process.
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FISCAL REVIEW
The financial elements of each Proposal, including ambulance rates proposed in the
appendices, will be conducted independently and in advance of the Proposal Evaluation
Panel’s review of the Proposals. Each Proposal will be evaluated on a pass/fail basis.
The financial analysis results will be provided to the Proposal Evaluation Panel.
NOTIFICATION
Following the completion of the proposal review process, Proposers will be notified of the
status of their Proposal (recommended for selection, not recommended for selection, or
disqualified) via email to the email address provided in the Proposal.
PROTEST
The LEMSA will endeavor to process Protests in a timely and consistent manner to
assure that all Proposers are accorded fair and equal consideration. Prot ests may only
be filed by “Eligible Protestors,” defined as Proposers who submitted a response to the
RFP. The grounds for a Protest may include any challenge to LEMSA’s process in
soliciting and reviewing the Proposals, including but not limited to a Protest on the
grounds that a Proposal was not evaluated in accordance with the Proposal Evaluation
Criteria. However, Protests that only challenge the judgment of the Review Panel shall
not be considered valid. The appealing Proposer must submit a protest of the selection
according to the specifications and by the deadline described in this section.
PROTEST PROCEDURE
Protests regarding the contract award must be submitted in writing via email to the
designated Purchasing Services Division representative no later than 5:00 PM PST of
the fifth (5) business day following the posting of the written notice of Intent to Award. All
Protests shall reference any pertinent County, State, Federal, or local laws or regulations
that are relied upon to support the Protest. Any documents relevant to the Protest
should be submitted when the Protest is filed, and the Protest should include all matters
that the party wishes the County to consider in deciding the Protest outcome.
Any written submissions after the initial filing shall, at LEMSA’s discretion, be limited to
information that was not, and could not have been, known at the time of the filing of the
Protest. At a minimum, the following must be included in the Protest:
The name and address of the Protesting party.
The signature of the Protestor or its representative.
Description of the nature of the Protest.
Identification of the provision(s) of the solicitation, regulations, or laws upon which
the Protest is based. The Protest must contain a complete statement of all
grounds for the Protest and must set forth all supporting facts and documentation.
Copies of all (or any) documentation supporting the allegations in the Protest.
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Statement of the specific relief requested.
It is the Protestor’s responsibility to ensure that the Purchasing Agent receives its
Protest. The County is not responsible for email transmission failures due to error, file
size, or any other factor and encourages Protestors to confirm receipt. The Protestor
must also submit, in writing, a copy of the Protest directly to the Proposer to whom the
contract has been awarded, as identified on the County’s Purchasing Services Division
website. All responses and replies must be in writing. If the presumptive Proposer
desires to respond to the Protest, the response must be submitted in writing via email to
the Purchasing Agent within five (5) business days of the date the Protest was first
delivered to all Protested Proposers. A Protestor’s failure to comply with these
procedures will constitute a waiver of any right to further pursue a bid Protest.
Throughout the Protest process, the County has no obligation to delay or otherwise
postpone an award of a contract. The Purchasing Agent shall attempt to resolve the
Protest in a fair and equitable manner and shall render a written decision to the Protestor
within fifteen (15) business days. The County reserves the right to extend the deadline
for good cause.
PROTEST APPEAL AND RESOLUTION
The Protestor may appeal the Purchasing Agent’s decision by delivering written notice of
the appeal no later than 5:00 PM PST on the fifth (5) full business day after the date of
the written decision.
The appeal should be e-mailed to the County’s Purchasing Agent. The Notice of Appeal
shall include the complete record of the Protest for review, which includes the Protest,
any and all Responses, Replies, Additional Information, Proof of Transmittal, and Notice
of Appeal.
Upon receipt of the written Protest, the Purchasing Agent or their designee will review
and evaluate the Protest and issue a written decision. The Purchasing Agent or their
designee may, at their discretion, do any of the following: investigate the Protest, obtain
additional information, and/or schedule a meeting(s) with the Protesting Proposer and
others (as appropriate) to discuss the Protest. The decision on the bid Protest must be
final prior to the Board hearing on the award or the award date.
The decision will be emailed to the Protestor. Proposers will be notified when a decision
has been made on the Protest and whether or not the recommendation to the Board of
Supervisors, OR in the Notice of Intent to Award/ Non-Award, will stand. The decision on
the bid Protest may be appealed to the Auditor-Controller's Office of Contract
Compliance & Reporting (OCCR).
WITHDRAWAL OF PROPOSALS
Proposals may be withdrawn/rescinded prior to the official public opening at the time and
date identified in the Procurement Timeline. No Proposals shall be allowed to be
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withdrawn/rescinded after this date for a period of ninety (90) calendar days after the
public opening of the Proposals.
PUBLIC RECORD
All Proposals, Protests, and information submitted in response to this solicitation will
become the property of the County and will be considered public records. However,
marking the material shall be considered only a request to keep the information
confidential, and the County does not assure that the information will not be disclosed if
disclosure is required under law, including but not limited to the California Public Records
Act. Any contract arising from this RFP will be a public record. Submission of any
materials in response to this RFP constitutes:
Consent to County release of such materials under the Public Records Act without
notice to the person or entity submitting the materials.
Waiver of all claims against County and/or its officers, agents, or employees that
County has violated a Proposer's right to privacy, disclosed trade secrets, or
caused any damage by allowing the Proposal or materials to be inspected.
Agreement to indemnify and hold harmless County for release of such information
under the Public Records Act.
Acknowledgment that the County will not assert any privileges that may exist on
behalf of the person or entity submitting the materials.
The County reserves the right to withhold any materials otherwise subject to the
Public Records Act during the pendency of negotiation of the contract (See
Michaelis, Montanari & Johnson v. Superior Court of Los Angeles (2006) 38
Cal.4th 1065.)
Acceptance of terms of this RFP, standard county contract long form, and contract
language therein.
AWARD
The County Board of Supervisors will make the final decision on the contract award,
following a recommendation from the Director of Health Services. If, for any reason,
the Selected Proposer is unable to enter into a contract with the County in a timely
manner, in accordance with the time interval identified in the RFP for contract
negotiation, the Director of Health Services may recommend a selection of an alternate
Proposal to the County Board of Supervisors. If no viable alternate Proposals exist, the
Director of Health Services may recommend another RFP process to the Board of
Supervisors. Outcomes of this RFP will be announced on the County of Contra Costa
Purchasing Services Division website.
3.4 PROPOSAL EVALUATION CRITERIA
The LEMSA’s specific intent is that the clinical and operational quality of service be the
primary factor in this procurement, although financial-related aspects are an important
consideration. The Proposer’s responses will be evaluated against the criteria
established in this RFP. Points will be awarded based on the following levels:
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Exceptional
To achieve an exceptional rating, all the criteria in the
rating section must be met. Not meeting one of the criteria
in the section rating will not result in achieving an
exceptional rating. The proposed approach to the
criterion requirements:
Demonstrates an approach with exceptional merit and
reflects an excellent approach.
Will result in outstanding performance.
Provides significant advantages with no weaknesses or
deficiencies.
Is clear and precise, fully supported, and demonstrates a
complete understanding of the requirements.
Risk Level: Very Low
EXCEPTIONAL responses will receive 100% of the allowed
points for that criterion.
Good
The proposed approach to the requirements and criterion:
Demonstrates a sound approach which is expected to
exceed all requirements and objectives.
Will result in above standard performance.
Includes multiple strengths, only a few minor
weaknesses, and no deficiencies.
Is clear and precise, supported, and demonstrates a clear
understanding of the requirements.
Risk Level: Low
GOOD responses will receive 85% of the allowed points for that
criterion.
Acceptable
The proposed approach to the requirements and criterion:
Demonstrates an approach which is capable of meeting
all requirements and objectives.
Will meet the minimum performance expectations, but not
exceed them.
Has strengths and weaknesses, but no deficiencies.
Response is clear, precise, supported and demonstrates
a general understanding of all requirements.
Risk Level: Moderate
ACCEPTABLE responses will receive 50% of the allowed points
for that criterion.
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Unsatisfactory The proposed approach to the requirements and criterion:
Demonstrates an approach that will NOT be capable of
meeting all requirements and objectives.
Will result in unsatisfactory performance.
Has multiple weaknesses and/or multiple deficiencies with
minimal strengths.
Lacks clarity or precision, lacks support, and/or fails to
indicate an understanding of the requirements.
Risk Level: Very High/Prohibitive
UNSATISFACTORY responses will receive ZERO points.
If the majority of reviewers (3/5) score a specific criterion as UNSATISFACTORY, the
entire Proposal shall be rejected for future to meet the minimum specifications and
performance requirements contained within this RFP.
Rating Possible Points %
Exceptional 75 50 45 25 15 10 5 100%
Good 63.75 42.5 38.25 21.25 12.75 8.5 4.25 85%
Acceptable 37.5 25 22.5 12.5 7.5 5 2.5 50%
Unsatisfactory 0 0 0 0 0 0 0 0%
All Proposers are required to achieve the minimum specifications and performance
requirements contained in this RFP. In evaluating each Proposer’s response to the
criteria, a Proposer’s offer to exceed minimum requirements will be considered when
Proposals are scored.
MANDATORY TABLE OF CONTENTS AND EVALUATION CRITERIA
This section includes the criteria that will be considered when scoring the Proposals.
The Table of Contents shall mirror the format below:
1. Summary, Proposal Overview
2. Procurement Information
2.2 Eligibility of Applicant
2.7 Statement of Compliance with Procurement Process
3. Proposal Instructions
3.1 Proposal Format and Instructions Followed
3.2 Minimum Qualifications and Documentation of Credentials
4. Service Plan
4.1 Proposer’s Functional Responsibilities
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4.2 Services Description
5. Clinical Standards
5.1 Quality Management Program
5.2 Clinical Performance Management
5.6 Continuing Education Program Requirements
5.7 Medical Reviews / Audits
5.8 Dedicated Personnel
5.9 Clinical Innovation
6. Operational Standards
6.1 Deployment Planning
6.2 Ambulance Staffing Requirements
6.3 Vehicles and Equipment
6.4 Communications Systems
6.5 Technology and Data Management
6.6 Non-Clinical Training
6.7 Critical Incident Stress Management
6.9 Disaster Response and Preparedness
7. Response Time Performance Standards and Penalties
7.2 Response Time Performance Plan
8. Administrative Standards
8.1 Community Engagement
8.2 Patient Experience Evaluation
8.3 Customer Service Hotline and Complaint Process
8.4 Employee Safety and Wellness
8.5 Internal Risk Management Program
8.6 Communicable Diseases, Safety, and Prevention
8.7 Key Personnel
8.8 Participation in System Development and Enhancements
9. Regulatory Compliance and Financial Standards
9.7 Insurance Provisions
9.8 Performance Security
10. Default, Termination and Other General Provisions
10.4 Emergency Takeover
11. System Integration and System Innovation
11.1 System Integration
11.2 System Innovation
12. Financial Documentation and Proposed Pricing
Each Proposer is required to complete each line on the Price Sheet for
proposed patient charges located in the Pricing Form in the appendices.
This sheet should be completed and titled “Pricing Form” and submitted
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separately from the technical Proposal. The supporting material shall
include audited financial statements for the most recent fiscal year and
other pertinent documents.
The matrix that will be used in the Proposal review process is outlined below. The total
points that can be awarded for each area are identified.
Scoring Criteria Points
Minimum Qualifications PASS /FAIL
Required Submission Forms PASS /FAIL
Financial Assessment PASS /FAIL
2.2 Proposer is an Eligible Entity PASS /FAIL
2.7 Compliance with Procurement Process PASS /FAIL
3.1 Proposal Format and Instructions Followed PASS /FAIL
3.2 Meets Minimum Qualifications PASS /FAIL
Clinical Standards 200
5.1 Quality Management Program 50
5.2 Clinical Performance Management 75
5.6 Continuing Education Program Requirements 10
5.7 Medical Review / Audits 10
5.8 Dedicated Personnel 10
5.9 Clinical Innovations 45
Operations Standards 100
4.1 Proposer’s Functional Responsibilities 5
4.2 Services Description 5
6.1 Deployment Planning 25
6.2 Ambulance Staffing Requirements 10
6.3 Vehicles and Equipment 10
6.4 Communications Systems 5
6.5 Technology and Data Management 5
6.6 Non-Clinical Training 5
6.7 Critical Incident Stress Management 10
6.9 Disaster Response and Preparedness 5
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Response Time Performance Standards and Penalties 40
7.2 Response Time Performance Plan 40
Administrative Standards 100
8.1 Community Engagement 25
8.2 Patient Experience Evaluation 5
8.3 Customer Service Hotline and Complaint Process 5
8.4 Employee Safety and Wellness 15
8.5 Internal Risk Management 10
8.6 Communicable Diseases, Safety, and Prevention 5
8.7 Key Personnel 15
8.9 Participation in System Development and Enhancements 10
Regulatory Compliance and Financial Provisions PASS /FAIL
9.7 Insurance Provisions PASS /FAIL
9.8 Performance Security PASS /FAIL
Default, Termination, and Other General Provisions PASS /FAIL
10.4 Emergency Takeover PASS /FAIL
System Integration and System Innovation 60
11.1 System Integration 25
11.2 System Innovation 35
Total Points 500
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SECTION 4 – SERVICE PLAN
4.1 SELECTED PROPOSER’S FUNCTIONAL RESPONSIBILITIES
The Selected Proposer shall provide emergency ambulance services, as requested by
the County Designated Communications Center. Such services shall be provided in
accordance with the applicable federal, state, and local law and applicable regulations,
rules, policies, and practices, and any amendments or revisions thereof. In performing
services hereunder, the Selected Proposer shall work cooperatively with the County’s
EMS System, the LEMSA, and other system participants as applicable. As part of the
qualifications for submitting a Proposal in response to this RFP, all Proposers are
assumed to be familiar with the laws and regulations that apply.
The Proposal submitted by the Selected Proposer in response to this Request for
Proposal will be retained, incorporated herein by this reference, and made a part of the
final Agreement, except that in the case of any conflicting provisio ns, the provisions
contained in the Ambulance Service Agreement shall prevail. The Selected Proposer will
provide and manage the delivery of ambulance services by meeting or exceeding the
requirements of this RFP, including response time performance, thro ughout the term of
the Agreement.
All factors that might affect the Selected Proposer’s or Subcontractor’s ability to perform
are under the Selected Proposer’s control and the Selected Proposer’s responsibility,
including the hiring of personnel, equipment maintenance, in-service training, vehicle
deployment, coverage levels, shift schedules, and selection of posting locations.
Numerous ancillary and support functions are also among the Selected Proposer’s
responsibilities, such as maintaining compliance with insurance requirements, personnel
recruitment, disaster readiness, emergency response planning, inventory control, and
other functions.
4.2 SERVICES DESCRIPTION
DESCRIPTION
The Selected Proposer shall furnish all ambulance service for the entire population (and
visitors) within Contra Costa County ERAs I, II, and V. The Selected Proposer shall use a
dispatch center that is authorized by the EMS Agency to perform Emergency Medical
Dispatch ( EMD). This center must be accredited by the International Academy of
Emergency Medical Dispatch (IAED). The successful proposer will either operate an
accredited EMD center or contract with an existing accredited EMD center with
contractual assurance that the EMD center will maintain its accreditation with IAED. The
Selected Proposer’s ambulance services shall be provided at the paramedic (ALS) level,
while some services, including non-acute urgent requests (as described within this RFP),
may be provided at the EMT (BLS) level in accordance with current medical protocols
and policies approved by the LEMSA Medical Director. BLS units cannot be substituted
for ALS units on requests/responses that are prioritized to require ALS.
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BASIC SERVICES
This list of Selected Proposer’s responsibilities should be considered illustrative only and
is not a complete list of responsibilities. For requests originating within the County, the
Selected Proposer shall (at a minimum) perform the following services to the complete
satisfaction of the County:
For emergency ambulance requests, provide ambulance services, without
interruption, 24 hours per day, 7 days per week, 52 weeks per year, for the full
term of this Contract.
Provide ambulance services without regard to the patient 's race, color, national
origin, religious affiliation, sexual orientation, age, gender, or ability to pay.
Employ and manage all personnel in manner to effectively meet the contractual
obligations outlined within this RFP.
Furnish all in-service trainings that are required of all personnel.
Procure and maintain vehicles, fuel, lubricants, and insurance on vehicles and
equipment.
Operate its ambulance system to meet all applicable staffing, clinical, and
response time requirements.
Maintain superior working relationships with EMS System participants and
partners.
Ensure courteous, professional, and safe conduct of all ambulance personnel and
other staff at all times.
Maintain neat, clean, and professional appearance of all personnel, equipment,
and facilities.
Promote and maintain the excellent reputation of the County’s EMS System
through superior service and courteous and professional conduct, participation in
published research and industry affairs, prompt response and follow -up to
inquiries and complaints, leadership in community activities including health fairs,
school demonstrations, CPR programs, and civic affairs, and upon request,
participation in local media events, business, and social group meetings.
Actively participate in the medical audit and Quality Management processes,
provide special training and support to personnel in need of assistance in specific
skills or knowledge areas, and provide additional clinical leadership by
maintaining current and extensive knowledge of developments in EMS equipment,
procedures, and research.
Maintain personnel certifications in accordance with local and state laws and
regulations.
Advise the LEMSA Director or their designee concerning any financial and
operational implications of proposed changes under consid eration for adoption,
including submission of a written “Financial Impact Statement,” if requested.
Keep LEMSA informed in a timely manner of all activities, issues, and policy or
procedure modifications that may reasonably be expected to affect the County ’s
EMS System.
Develop a deep understanding among its employees of the unique structure and
operation of the County’s EMS System and the role of LEMSA through formal
orientation and regularly scheduled in-service programs.
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Stay current with and comply with all federal laws, state laws and regulations, and
local ordinances and policies.
SECTION 5 – CLINICAL STANDARDS
5.1 QUALITY MANAGEMENT PROGRAM
Clinical performance is the cornerstone of the Contra Costa EMS system. Accordingly,
LEMSA requires that the Selected Proposer develop and implement a comprehensive
quality management program that meets the requirements of the California Code of
Regulations, Title 22, Chapter 12 (EMS System QI) and is within the protocols and
standards established by LEMSA. The Selected Proposer must incorporate compliance
assurance, process measurement and control, and process improvement that is
integrated with the entire EMS System, including first responder agencies and LEMSA.
The delivery of clinical care shall be “evidence-based,” which means that care shall be
consistent with clinical best practices at the time of Contract award and shall
continuously evolve during the Contract period as evidence for clinical best practices
dictates.
Proposer will describe their overall approach to comprehensive quality management and
the tracking and reporting of clinical Key Performance Indicators (KPIs). A sample (for
illustrative purposes only) of the type of initial monthly reporting tool LEMSA anticipates
the provider will utilize is located in Appendix 12.7.
QUALITY PROCESSES AND PRACTICES
The proposed program should integrate compliance assurance, process measurement
and control, and process improvement within the EMS system. This includes first
responder agencies, medical communication center operations, and EMS, and should
cover prospective, concurrent, retrospective, and reporting/feedback mechanisms as
outlined in the County EMS Quality Improvement Program Plan. Proposers must detail
how their leadership and staff in Contra Costa County will contribute to the county's
quality management program. This involves:
Senior leadership's active involvement in EMS quality management groups or
committees.
Appointing a Quality Manager to lead the Selected Proposer's quality program.
Providing detailed key performance indicator reports to the County.
Engaging in initiatives aimed at enhancing EMS quality within Contra Costa
County.
Outlining a comprehensive approach to quality management.
Participating in local Health Data Exchange (HDE) initiatives sanctioned by the
LEMSA.
Optimal clinical care and patient outcomes
Continual skill competency and use of measurable performance standards
Adherence to LEMSA protocols, policies, and procedures
High-quality patient care and thorough incident documentation
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Fair evaluation and remediation of clinicians following a just culture approach
Effective implementation of its Quality Improvement Plan
In preparing a proposal, it's essential for Proposers to thoroughly addre ss key aspects of
their leadership and quality management practices. Below are the critical points that
need to be included. These elements are crucial for demonstrating an organization's
commitment to effective leadership and quality management in their proposal.
Leadership Structure - Provide a detailed description of the organization's
leadership structure. This should include an organizational chart that clearly
identifies each individual in leadership and quality improvement roles. For each
person listed, include their name and the amount of time dedicated to their
position, expressed as a full-time equivalent (FTE) percentage (e.g., 0.5 FTE or
1.0 FTE).
Quality Management Competencies - Explain the quality management skills
present within the leadership team, emphasizing their proficiency in analyzing
performance data and leading improvement initiatives.
Quality Management System - Describe a comprehensive quality management
system that covers all critical areas for achieving the organization ’s goals,
including clinical performance, employee management, fleet management, and
fiscal sustainability.
Communication Methods - Outline the strategies employed to foster open
communication with the workforce, including how the effectiveness of this
communication is evaluated. Detail how performance data is communicated to
workforce members directly involved in or affected by the performance measures.
Promotion of Legal and Ethical Behavior - Describe the actions taken by the
leadership team to encourage legal and ethical behavior throughout the
organization. Include the process for addressing instances of ethical misconduct.
Cultivation of Safety Culture - Explain how the organization's leadership promotes
a culture prioritizing patient and employee safety.
Handling Adverse Situations - Detail the organization's approach to managing
situations that have negatively affected or could potentially affect patients or the
public.
Understanding Customers - Explain the methods your organization employs to
identify and understand patients' and other customers' desires, needs, and
expectations.
Incorporating Customer Feedback into Quality Management - Outline the
mechanisms for integrating patient and customer feedback into the quality
management processes.
Assessment and Monitoring - Describe the strategies your organization uses to
evaluate and track its effectiveness in meeting the needs and desires of patients
and other customers.
Complaint Management - Detail the management processes, including how
complaints are received, investigated, resolved, and tracked. Explain how
complaint patterns are analyzed and provide examples of improvements made
from this analysis.
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Infection Control for Clinicians - Explain the procedures for ensuring infection
control among the organization's clinicians.
Confidentiality and Compliance - Ensure that documentation and findings related
to the quality improvement process are confidential and comply with legal
requirements, including HIPAA Business Associate agreements where necessary.
Quality Management System - Describe a comprehensive quality management
system that covers all critical areas for achieving the organization ’s goals,
including clinical performance, employee management, fleet management, and
fiscal sustainability.
Performance Indicators - Collaborate with the LEMSA Director, Medical Director,
and relevant quality committees to define and annually update Key Performance
Indicators (KPIs) aiding in measuring progress.
Compliance Tracking - Include KPIs that monitor adherence to Clinical
Performance Standards and LEMSA-prescribed metrics. Describe the method for
regularly assessing compliance with LEMSA policies, including monthly reports or
real-time dashboards highlighting compliance issues with statistical analysis.
Learning and Improvement - Describe the approach to continual learning and
performance improvement, incorporating industry and non-industry benchmarking
strategies.
Reporting - Agree to produce and provide timely reports on any subject matter
requested by the LEMSA, in addition to the reports outlined in the requirements.
Community Health Improvement Commitment - Illustrate the Proposer's
dedication to tangible community health improvements through preventative
measures, chronic disease management, or public educat ion initiatives.
Project Management Approach - Explain the strategy for initiating, overseeing,
and evaluating improvement projects.
5.2 CLINICAL PERFORMANCE MEASUREMENT
Whereas response time performance has previously been the central financial
disincentive for ensuring Selected Proposer performance in most EMS systems in
California and elsewhere, LEMSA intends to make Selected Proposer’s adherence to
clinical expectations the primary economic driver of performance in the EMS system.
To maintain high-quality EMS services, the clinical quality of the Selected Proposer’s
care provided to the patients will be routinely measured. The Selected Proposer’s
superior performance on specific, identified evidence-based clinical metrics will be
required. Selected Proposer shall work with LEMSA to develop an electronic reporting
method for the measurement of these clinical metrics. A data submission platform shall
show clinical metrics in real time and be approved by LEMSA. Measurement of clinical
performance will be conducted through a clinical scorecard measuring system defining
clinical KPIs as shown in Appendix 12.7.
LEMSA has identified clinical KPIs organized into three (3) Bundles of Care: (1) STEMI
(2) Stroke and (3) General, which includes Trauma. These KPIs are considered to have
a direct impact on the health and safety of patients within the EMS System. These
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metrics may change as needed, determined by performance, EMS System changes,
and/or LEMSA’s CQI process. Changes will be made with mutual agreement between
LEMSA and Selected Proposer as needed.
Based on the Selected Proposer’s clinical performance through measurement utilizing
the clinical scorecard, LEMSA will either provide a financial credit on Response Time
Compliance penalties, provide no financial credit, or levy penalties for non-compliant
clinical performance. LEMSA intends to evaluate and measure the Clinical Scorecard on
a monthly basis, reviewing the Selected Proposer’s performance in all clinical measures,
as well as tabulating a weighted total compliance value for all clinical KPIs.
Each Bundle of Care is worth a financial percentage credit for a total available financial
credit of 80% toward the overall levied Response Time Compliance penalties for the
same month. Bundles of Care percentages include: STEMI 30%, Stroke 20% and
General 30%. This may only be applied to the concurrent calendar month of Response
Time Compliance penalties. Credits may not be banked or used at a future date.
Bundle of
Care
Credit
Available
STEMI
Bundle
30%
Stroke
Bundle
20%
General
Care
Bundle
30%
TOTAL
DISCOUNT
AVAILABLE
80%
While compliance with clinical performance standards will be calculated for each month,
penalties or credits will not be assessed for any measure in any interval for which there
are less than one hundred (100) patient encounters. For purposes of penalty
assessments or credits, any measure with less than one hundred (100) patient
encounters will not be counted in the subsequent month until one hundred (100) such
encounters in any measurement category are recorded. And no penalties may be
assessed until the parties have engaged in the collaborative process described herein.
The clinical performance standards set forth in this RFP were derived from a variety of
sources. The performance standards are, in most cases, evidence-based or based on
national consensus benchmarks. Some specific measures were incorporated from the
California EMS Authority EMS Core Quality Measures Project¸ the National EMS Quality
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Alliance (NEMSQA) National EMS Quality Measures Set, American Heart Association
Get With The Guidelines, and the National Quality Forum List of Serious Reportable
Events.
Categories of clinical performance standards include:
Serious Reportable Events
Percentile Clinical Performance Standards (Table #below)
The Selected Proposer understands and expressly agrees that the clinical performance
standards set forth in this RFP are subject to change. LEMSA reserves the right to add
to, subtract from, or modify the standards set forth herein upon a minimum of sixty (60)
days prior notice to Selected Proposer. LEMSA will work with the Selected Proposer
during the prior notice period to discuss such proposed changes and, where possible, to
aid it in satisfying changes in clinical performance standards.
Selected Proposer will be eligible for financial credit(s) as long as no single clinical metric
is at or below the Level 1 threshold for penalties. A financial credit will be applied for
each clinical bundle whose weighted average is above the average threshold for that
bundle. A maximum of 80% credit may be applied to the Response Time Compliance
penalties for that same month, if incurred.
It is important to note LEMSA is currently establishing a baseline level of clinical
performance and will finalize a beginning baseline during the beginning two months of
this contract, concurrent with the grace period for response compliance. References to a
baseline clinical scorecard compliance of 90% (or any other percentage) are for
illustrative purposes only. Actual percentages may vary and will be finalized during the
contract negotiation process.
Compliance thresholds will be defined as:
90% and above – Compliant, Credit available (if eligible)
80%-89.99% - Compliant – No Credit Available/No Penalties Applied
75%-79.99% - Level 1 Non-compliance
74.99% and below – Level 2 Non-compliance
Clinical
System Clinical Metric Assigned
Weight
Weighted
Average
Complianc
e Reqd for
discount
Level 1
Threshol
d
Level 2
Threshol
d
STEMI BUNDLE OF CARE
STEMI-
1
% of patients with
primary impression
of CP-ACS or
STEMI who
received 12-lead
ECG
20% 15% 90% 80% 75%
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STEMI-
2
% or patients with
primary impression
of CP-ACS or
STEMI who receive
prehospital ASA
20% 25% 90% 80% 75%
STEMI-
3
STEMI ECG
acquisition < 10
minutes from on-
scene time
20% 25% 90% 80% 75%
STEMI-
4
STEMI
transmission and
notification <10
minutes of first
STEMI 12-lead
ECG
20% 25% 90% 80% 75%
STEMI-
5
Scene time < 15
minutes for STEMI
call
20% 10% 90% 80% 75%
Total
100%
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STROKE BUNDLE OF CARE
Stroke-1
% of patients with
primary impression
Stroke/TIA who had
blood glucose
testing performed
25% 30% 90% 80% 75%
Stroke-2
% of Stroke Alert
patients with
documented LKWT
25% 30% 90% 80% 75%
Stroke-3
% of patients with
primary impression
of Stroke with
LKWT < 24hrs that
had a Stroke Alert
documented
25% 30% 90% 80% 75%
Stroke-4
% of Stroke Alert
patients with scene
time < 15 minutes
25% 10% 90% 80% 75%
Total
100%
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GENERAL BUNDLE OF CARE
Trauma-
1
% of Trauma
Activation patients
(Red Boxes) with
scene time ≤ 20
minutes
20% 30% 90% 80% 75%
Airway-1
% of patients with
waveform
capnography
performed when
advanced airway
placed
20% 25% 90% 80% 75%
Airway-2
% of patients with
1st pass ETT
success
20% 25% 90% 80% 75%
Pediatric-
1
% of pediatric
patients (<14yo)
with weight
documented
20% 10% 90% 80% 75%
Pediatric-
2
% of pediatric
patients with
primary impression
Bronchospasm
who were treated
with β-agonist
20% 10% 90% 80% 75%
Total
100%
The Table identifies specific, objective, and readily identifiable adverse or sentinel events
that the LEMSA has determined should never occur in the Selected Proposer’s
performance of Services under the Contract. Accordingly, upon occurrence of any of
these events, and upon completion of the collaborative process prior to the assessment
of penalties, the Selected Proposer will pay to the LEMSA the penalty per occurrence in
accordance with the process for assessment of penalties set forth in this RFP. Because
46
of the criticality of Serious Reportable Events, assessment of penalties will begin
immediately upon the date Services begin under the Contract. Industry data suggest
that these events should indeed be infrequent, and the LEMA accordingly does not
anticipate that Serious Reportable Events will result in substantial penalty assessments.
Selected Proposer shall be entitled to present, and the LEMSA shall be obligated to
consider, evidence of good cause in requesting exemptions from all penalty
assessments.
Occurrence of a Serious Reportable Event is reportable to the LEMSA within twenty-four
(24) hours, including weekends and holidays. Serious Reportable Events are reportable
regardless of whether Selected Proposer believes that one or more good cause
exemptions may be applicable to the assessment of penalties. Note that failure to report
a Serious Reportable Event in the required time and manner is itself a Serious
Reportable Event for which separate and independent penalties may be assessed.
SERIOUS REPORTABLE EVENTS
Occurrence of a Serious Reportable Event is Reportable Within 24 Hours to Contra Costa
EMS
Failure to transport a STEMI patient to a STEMI Center
Failure to transport a Stroke Alert patient to a Stroke Center
Failure to transport a Trauma Activation (Red Box) patient to a Trauma Center
Unrecognized esophageal intubation
Patient death or serious adverse consequence associated with known hypoglycemia during
interval of EMS care
Death/serious adverse consequence from an incorrect medication or dosage
Death/serious adverse consequence from failure to uses equipment or device properly
Penalty of $ $500per occurrence
Example #1:
Refer to the image below. In this example, the Selected Proposer has not incurred a
financial penalty for any single metric and is therefore eligible for financial discount(s)
toward the same month’s Response Time Compliance penalties, if incurred.
The Selected Proposer has exceeded the Compliance Required for Discount for three
(3) out of four (4) Bundles of Care; the STEMI Bundle of Care did not exceed the
threshold required for a discount and did not fall below the threshold to incur any
47
penalties. The Selected Proposer will receive a 60% discount on any incurred Response
Time Compliance penalties within the same month.
Example #2: In this example, the Selected Proposer has not incurred a financial penalty
for any single metric and is therefore eligible for financial discount(s) toward the same
month’s Response Time Compliance penalties, if incurred.
The Selected Proposer has not exceeded the threshold for a clinical discount for any
Bundle of Care and did not fall below the threshold to incur any penalties for any Bundle
of Care. Therefore, the Selected Proposer is not eligible for a discount toward Response
Time Compliance penalties but will not incur a financial penalty.
48
Example #3:
In this example, the Selected Proposer has incurred a penalty for the clinical metric,
Trauma-1.
If any clinical bundle is scored at level 1 or level 2, the selected proposal will not be
eligible for any response compliance credits. In other words, compliance in any clinical
bundle that is below 80% invalidates all opportunity for credits towards response
compliance penalty.
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5.3 PENALTY PROVISIONS FOR CLINICAL PERFORMANCE
Isolated instances of individual deviations of clinical performance standards may be
considered instances of minor noncompliance with the Agreement and will be addressed
as outlined in the LEMSA policy. However, deviations of clinical performance standards,
which are severe or chronic, may constitute a Default of the Agreement as defined by
these specifications.
Failure to comply with any clinical performance metric or other requirements in this RFP
or the Agreement will result in non-compliant contract performance. Therefore, the
Selected Proposer and LEMSA agree to the penalties specified herein. It is also
expressly understood and agreed that LEMSA’s remedies in the event of the Selected
Proposer’s breach or any noncompliance, are not limited to this RFP or the final Contract
penalty provisions. Chronic failure to comply with the clinical performance requirements
may constitute material breach of contract and may result in the termination of the
Agreement.
The Clinical Scorecard outlines the Clinical Performance metrics for which LEMSA may
levy penalties and consider the Selected Proposer in breach based on performance.
These damages will be assessed monthly.
Level 1 noncompliance will result in a $1,500 damage per metric, per month.
Level 2 noncompliance will result in a $3,000 damage per metric, per month.
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Selected Proposer will be required to conduct a comprehensive performance
improvement process and submit it to LEMSA within 10 business days following the
identification of underperformance of the same metric for two consecutive months.
LEMSA will review and provide further recommendations as necessary prior to the
approval of any proposed corrective action.
Selected Proposer shall not be responsible for the payment of penalties for deficiencies
for the first six (6) months after implementation of Services. Penalties may be assessed
as set forth in Table for clinical performance deficiencies beginning on the first day of the
seventh month after commencement of Services. No assessments will be made prior to
engaging in the mandatory collaborative process set forth herein, and good cause
exemptions may be presented by the Selected Proposer and will be considered by the
EMS Agency
5.4 CLINICAL PERFORMANCE EXCEPTIONS
CLINICAL EXCEPTIONS AND EXEMPTIONS
Both LEMSA and the Selected Proposer desire to reduce the number of exceptions to
clinical performance standards granted under the Agreement. Selected Proposer shall
develop and maintain mechanisms to routinely monitor and address clinical performance
deficiencies.
In cases where the Selected Proposer can demonstrate significant impacts beyond the
Selected Proposer’s control and the control of the individual clinician(s) that impact
clinical performance, clinical performance deficiencies can be excused from clinical
performance compliance reports and penalties. Exceptions shall be for good cause only,
as determined by LEMSA including automatic appeals and case -by-case appeals.
CLINICAL CARE PROVIDED BY ANOTHER AGENCY ON SCENE
The Selected Proposer shall not be held accountable for the clinical care provided by
other agencies on scene unless that care was provided by the Selected Proposer’s
subcontractor or done at the direction of the Selected Proposer (or representative).
However, if the Selected Proposer identifies issues with patient care, patient or crew
safety, or any other issues that fall under the LEMSA reporting policy criteria, those
instances must be reported to the LEMSA as prescribed by LEMSA policy.
CLINICAL PERFORMANCE EXEMPTION REQUEST PROCESS
It is the Selected Proposer’s responsibility to routinely monitor clinical performance and
apply to LEMSA for an exception to a required clinical performance metric, utilizing
LEMSA-approved method.
If Selected Proposer identifies any response or group of responses that should be
excluded from the calculation of clinical performance compliance due to unusual factors
beyond Selected Proposer's reasonable control, Selected Proposer must provide
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detailed documentation for each actual response in question to LEMSA and request that
LEMSA exclude these elements of care from calculations. Any such request must be in
writing and received by LEMSA within ten (10) business days following the end of each
month.
A request for an exception received after the ten (10) business days will not be
considered nor will the request be subject to appeal. LEMSA will review each exception
request and decide on approval or denial and shall advise Selected Proposer of its
decision. This decision shall be final.
The following shall apply:
In the monthly calculation of Selected Proposer's performance to determine
compliance with the clinical performance standards, every request for service
shall be included except those for which exceptions are being granted by the
County.
Equipment failure, staff competence, staff training, or other causes deemed to be
within the Selected Proposer’s control or awareness shall not be grounds to grant
an exception to compliance with the clinical performance compliance standards.
Exemptions may be requested for the following:
o Major Disaster/State of Emergency.
o Known shortage of a medication and/or supply that has been previously
reported to LEMSA in a manner approved by LEMSA.
o Medical care provided by trainees not affiliated with the Selected Proposer
(e.g., paramedic interns).
o Medical Control (i.e., Base Hospital) direction to provide care outside of
policy.
o Unusual circumstances that prohibited the routine delivery of medical care
as outlined by LEMSA policy (e.g., an unsafe scene, HAZMAT, etc.).
o Other good cause that is outside the reasonable control of the Selected
Proposer.
5.5 PERSONNEL CERTIFICATION & TRAINING REQUIREMENTS
The Selected Proposer’s ambulance personnel responding to emergency medical
requests shall be currently and appropriately credentialed to practice in the State of
California and meet all local requirements to practice in Contra Costa County as
authorized by the LEMSA Medical Director. The Selected Proposer shall, at minimum,
conduct criminal background checks on employees upon hire and periodically review
driving records of employees. Selected Proposer shall retain on file at all times: copies of
the current and valid licenses, certifications, and/or accreditations of all emergency
medical personnel performing services under this Agreement. Paramedics and EMTs
shall obtain and maintain training as outlined in LEMSA policy.
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5.6 CONTINUING EDUCATION PROGRAM REQUIREMENTS
Selected Proposer shall become an approved CE provider, as outlined in the LEMSA
policy, and provide in-house or subcontracted in-service training programs designed to
meet state qualifications for EMS CE clinical direction following the California Code of
Regulations, Title 22, Division 9, Chapter 11, and the LEMSA policy.
The Selected Proposer is responsible for developing and providing, or arranging through
subcontractors, in-house Continuing Education (CE) training programs at no cost to
employees. These programs must meet State licensure/certification requirements and
LEMSA accreditation requirements.
The educational content should be tailored to meet the specific needs of the local
system. The LEMSA Medical Director has the authority to mandate specific requirement s
for the continuing education program and its content. Additionally, LEMSA reserves the
right to review and audit any continuing education programs the Selected Proposer
offers. It is highly recommended that the Selected Proposer collaborates with,
coordinates, and makes continuing education programs accessible to all participants in
the EMS system.
Selected Proposer shall also make those programs available to first responders and
other EMS System partners at no cost. In addition, Selected Proposer is required to
target educational content to address local system needs. All In-service and continuing
education programs must comply with state regulations and align with LEMSA policy.
5.7 MEDICAL REVIEW/AUDITS
The goal of the LEMSA medical audit process is to inspect and assure compliance of the
care delivered with the system’s established clinical care guidelines. Evaluation of a
statistically significant random sampling of patient contacts provides a snapshot of the
clinical care provision and enables LEMSA Medical Director to identify the need for a
more targeted or detailed audit. The process also assists to validate the effectiveness of
ongoing process measures to monitor and improve the performance of care.
If the audit process is to be positive, it must be just one component of a quality
management program that places the majority of attention and activity on measuring
system process performance and routinely engaging in improvement efforts that result in
reduction of common causes of process variation and/or improvement in process
performance over time. It is Selected Proposer's responsibility to comply with the
LEMSA Medical Director audit/review process and initiate process measurement and
improvement activities based on the results of the audit/review.
The LEMSA Medical Director may require that any Selected Proposer ambulance
transport employee attend a medical audit when necessary. All employees, at their
option and expense, may attend any audit involving any inciden t in which they were
involved that is being formally reviewed but must maintain the confidentiality of the
medical audit process. Attendance of every certificate holder involved in a case being
reviewed is not required, unless mandated by the LEMSA Medical Director.
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5.8 DEDICATED PERSONNEL
The Selected Proposer’s quality management program shall be incorporated into every
layer of management and not be assigned to the responsibility of a single frontline or
middle management position. A manager with hiring authority shall be responsible for
oversight and management of the KPIs and ongoing organization -wide quality
management programs.
Selected Proposer shall participate in LEMSA led system-wide research initiatives and
provide internal staffing support for components of the research as directed by LEMSA
Medical Director.
5.9 CLINICAL INNOVATIONS
It is LEMSA’s intent that the successful Proposer has a proven track record of clinical
innovations. The Proposer shall routinely work with LEMSA staff and the LEMSA
Medical Director to identify data-driven service innovations to elevate the level of clinical
care. These innovations can be (but not limited to): clinical audit and evaluation tools,
use of new technology or medications, clinical training methodology, provider feedback,
data analysis, and CQI methods.
The Proposer shall provide a list of recent clinical innovations that they have
implemented within the past five (5) years. The list should include, but not limited to:
Stated clinical problem/issue being addressed
Process used to identify solution
Clinical innovation
Training development and deployment
EMS System/partner engagement/inclusion
How the impact was measured/evaluated
How associated costs were mitigated
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SECTION 6 – OPERATIONAL STANDARDS
6.1 DEPLOYMENT PLANNING
Proposers are required to submit a deployment plan that ensures the provision of 911
response services as outlined in this request for proposal (RFP). The plan must align
with the RFP's objectives.
LEMSA NOTIFICATION
The LEMSA understands the Selected Proposer will be developing enhanced coverage
and deployment plans during its term of operations. The Selected Proposer shall notify
LEMSA within thirty (30) calendar days prior to implementation of any proposed System
Management Changes. Including any changes in post locations, hour of day coverage
levels, or station changes, LEMSA reserves the right to review the proposed material
deployment alterations and request changes. Selected Proposer Periodic and temporary
changes to coverage and deployment plans will be at the discretion of the Selected
Proposer in accordance with LEMSA policies.
DEPLOYMENT PLAN REQUIREMENTS
Proposer deployment plans submitted to the LEMSA in response to this RFP and for the
duration of the Agreement must contain the following:
Detailed plan for QA/QI of system status management, field response, and how
Selected Proposer will ensure their deployment sustains achievement of
performance metrics and improves EMS delivery efficiency. At a minimum this
plan should include:
o System status management QA/QI
Includes weekly report
o Analysis of commonalities for late calls including but not limited to:
Posts with higher rate of late calls when ERA is level 3 or higher
Higher instance of chute times for individual units or posts based on
AVL tracking and road/response speeds
Time of day / traffic patterns
Effective technology/software to track and automate response
reports for individual units
Proposed number of ambulances to be deployed during each hour of the day and
day of the week.
24-hour and system status management strategies, including call volumes and/or
geographic challenges being addressed.
Mechanisms to meet the demand for emergency response during peak periods or
unexpected periods of unusually high call volume including disasters and other
surge events, such as high flu season. A process that identifies how additional
ambulance hours will be added by the Selected Proposer if the response time
performance standard is not met must be included in the plan.
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A map identifying proposed ambulance deployment facilities, station(s) and/or
post locations within the geographic zones as indicated in this RFP must be
included.
The Proposer is not required to provide ambulance stations unless staffing 24 -
hour shifts.
Workforce necessary to fully staff ambulances identified in the deployment plans.
Any planned use of on-call crews.
Ambulance shifts and criteria to be used in determining shift lengths.
Any use or potential use of mandatory overtime.
Record keeping and statistical analyses to be used to identify and correct
response time performance problems.
Any other strategies to enhance system performance and/or efficiency through
improved deployment/redeployment practices.
6.2 AMBULANCE STAFFING REQUIREMENTS
ALS RESPONSES
During the term of the Agreement, all ALS level responses, as defined in this RFP, shall
be staffed with a minimum of one (1) EMT-P and one (1) EMT. The ambulance shall be
equipped to render ALS level care and transport as outlined in LEMSA policy.
Additionally, per local policy, the Selected Proposer is allowed to transport patients using
BLS clinicians if, after an initial assessment, the patients meet local policy criteria for
BLS transport.
BLS RESPONSES
During the term of the Agreement, all BLS level responses, as defined in this RFP, shall
be staffed with a minimum of two (2) EMTs. The ambulance shall be equipped to render
BLS level care and transport as required by LEMSA policy. A BLS ambulance shall not
be equipped with ALS equipment including but not limited to durable medical equipment,
or medications.
ELECTRONIC DATABASE
The Selected Proposer shall maintain a single electronic database for all clinical
personnel. The Selected Proposer's database shall maintain a process for ensuring that
all EMS clinicians receive all required continuing education (CE) hours and for ensuring
the accuracy and integrity of all CE education and record keeping. This includes the
process of ensuring attendance at the required CE and verifying the accuracy of the
records of the personnel in attendance. AHA BLS, ACLS, PALS, and state EMS license
or other county-required training certifications are examples of documentation that would
be maintained. The LEMSA shall have electronic access to this database, which will be
continually updated to keep records current.
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WORK SCHEDULES AND HUMAN RESOURCE ISSUES – AN
EMPLOYEE MATTER
Although this is a performance-based Agreement and Selected Proposer is encouraged
to be creative in delivering services, Selected Proposer is expected to employ
reasonable work schedules and conditions. Specifically, patient care must not be
hampered by impaired motor skills of personnel working extended shifts, part-time jobs,
voluntary overtime, or mandatory overtime without adequate rest. At least 51% of
Proposer’s workforce shall be full-time employees.
Proposer shall describe:
Examples of work schedules, shift assignments, policies including those related to
workload protection, and any audit criteria related to work schedules and working
conditions.
Methods that will be used to minimize the turnover rate among the Selected
Proposer’s personnel.
How the Proposer will measure workload and fatigue for ambulance crews.
Personnel recruitment and screening processes.
Employee retention program.
Crew members working on ambulances in the County with a Unit Hour Utilization (UHU)
greater than 0.30 for 24-hour shifts and 0.50 for 12-hour or less shifts shall not be
permitted to work shifts (whether scheduled or overtime) longer than 48 consecutive
hours and shall not remain on duty for longer than 60 consecutive hours due to late calls
or unscheduled holdovers. For higher performance shifts, a rest period of at least 12
consecutive hours between shifts is required. The only exception will be a declared
disaster. Proposers should describe their mechanism to assure that these requirements
are adhered to.
LEMSA emphasizes that the Selected Proposer is responsible for conducting
employment matters with its employees, including managing personnel and resources
fairly and effectively in a manner that ensures compliance with the Agreement ultimately
executed by the Selected Proposer.
6.3 VEHICLES AND EQUIPMENT
Selected Proposer shall be responsible for acquisition and maintenance of all
ambulances, support vehicles, on-board medical supplies/equipment, and office facilities
and equipment to be used by Selected Proposer to perform its services under the
Agreement. All costs of maintenance, including parts, supplies, spare parts, and costs of
extended maintenance agreements, shall be the responsibility of the Selected Proposer.
AMBULANCES
All ambulances shall meet federal, state, and local ordinance requirements as outlined in
all applicable California State Statutes and Regulations, and local ordinances. Selected
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Proposer shall be responsible for penalties incurred by both contract and ordinance.
Proposers shall articulate that their intended fleet can conform to the following
requirements:
Ambulances may be standard Type I, Type II, or Type III.
Be similarly configured with the capability to carry all supplies necessary to
function in accordance with LEMSA System Policies, Protocols, and Procedures.
It is a requirement that ambulances utilize powered, hydraulic gurneys to reduce
incidents of spinal load injuries and increase the margin of safety for patients,
EMTs, and paramedics.
Selected Proposer shall have a mechanism to monitor driver safety through a
driver video surveillance system.
Ambulances shall be limited to a maximum mileage of 300,000miles; in the event
there are delays in end-stage ambulance manufacturer or remounting production
time, the Selected Proposer can request an exception from LEMSA that includes
documentation of regularly scheduled maintenance performed and documentation
of delays from the manufacturer.
Supervisor and other support vehicles shall be limited to a maximum of 250,000
miles.
As part of the final contract, the Selected Proposer will be required to provide
LEMSA with a list of all vehicles detailing make, model, age, and maintenance
records.
Selected Proposer shall maintain a fleet of ambulances that meets or exceeds
120% of the peak level of deployment.
As technology allows, the Selected Proposer shall explore available green
alternatives.
VEHICLE BRANDING
Ambulance vehicles used in providing contract services shall conform with local
ordinance for markings, decals, etc. The LEMSA reserves the exclusive right to approve
or alter the design, color, and lettering of emergency response vehicles and equipment
according to its judgment.
VEHICLE MAINTENANCE
The Selected Proposer shall maintain its vehicles in good working order consistent with
the manufacturer's specifications. In addition:
Detailed records shall be maintained as to work performed, costs related to
repairs, and operating and repair costs analyses where appropriate.
Selected Proposer shall employ a maintenance program record-keeping system.
The system should track both scheduled and unscheduled maintenance (by
vehicle and by fleet) and shall track equipment failures during ambulance
responses, as per LEMSA policy.
Selected Proposer’s vehicle maintenance program must be designed and
conducted to achieve the highest standards of reliability appropriate to a modern
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emergency service and shall comply with or exceed the maintenance standard as
outlined in the Commission on Accreditation of Ambulance Services.
Proposer shall describe its policy for vehicle replacement including the maximum
number of years and mileage that an ambulance will be retained in the EMS
System.
Any ambulance or support vehicle with any deficiency that compromises, or m ay
reasonably compromise its function, must immediately be removed from service
and remedied.
The LEMSA requires that ambulances and equipment with defects, including
significant visible, cosmetic damage, be removed from service for repair without
undue delay.
Any vehicle failure during an emergency (911) response must be reported to
LEMSA according to local policy or within 24 hours, whichever prescriptive
timeframe is shorter. Subsequent (same) vehicle failures during a 6 -month period
shall not constitute good cause for response exemption.
Proposers shall outline their strategy for maintaining EMS clinician safety during
patient transport, including specifically the use of restraint/harness systems by
EMS clinicians in the patient compartment.
EQUIPMENT
Selected Proposer shall have sole responsibility for furnishing all equipment necessary
to provide required service. All equipment on board, including medical supplies and
communication devices the Selected Proposer uses, will adhere to or surpass the
minimum standards set by applicable LEMSA policies. Additionally, new items must
receive explicit approval from the LEMSA Director before any purchase is made.
Selected Proposer agrees that equipment and supply requirements may be changed
with the approval of the LEMSA Director due to changes in technology, regulations, or for
other appropriate reasons.
Each ambulance shall carry standardized on-board equipment, medical supplies,
and personal communications equipment and supplies that meet federal, state,
and LEMSA requirements, policies, and procedures.
Such equipment and supplies will be stored in the same or similar location in all
ambulances.
All expendable supplies including medications and controlled substances must be
restocked by the Selected Proposer.
All medical equipment shall always be in good repair and safe working order.
Selected Proposer shall maintain accurate durable medical equipment routine
checks, maintenance, failure and occurrence records, which will be made
available to LEMSA.
Each ambulance shall be fully stocked and with sufficient medical equipment and
expendable supplies to accommodate replacement during repair and for times of
excessive demand in the system.
All costs of maintenance and repairs, including parts, supplies, spare parts and
inventories of supplies, labor, subcontracted services, and costs of extended
warranties, shall be at the Selected Proposer’s expense.
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The Selected Proposer shall describe how upgrades to equipment will be handled
and funded, during the duration of the contract including items such as biomedical
devices or other equipment as deemed appropriate by the LEMSA.
The Selected Proposer agrees that equipment and supply requirements may be
changed with the approval of the LEMSA Medical Director due to changes in
technology. To the maximum extent feasible, all equipment and supplies to be
exchanged shall be fully interchangeable/interoperable with those of all p rovider
agencies including first responders in the system.
Any piece of equipment with any deficiency that compromises, or may reasonably
compromise its function, must immediately be removed from service, replaced
with working equipment, and remedied prior to the piece of equipment going back
into service.
The Selected Proposer shall maintain a reserve/backup cache of biomedical
equipment to ensure consistent service delivery should critical pieces of
equipment fail or require repair/service that meets or exceeds 120% of the peak
level of deployment.
SUPERVISOR VEHICLES/QRVS
Supervisor vehicles and QRVs must be able to carry all supplies necessary to function
as an ALS First Responder according to LEMSA Policies and Procedures.
MINIMUM IN-SERVICE EQUIPMENT AND SUPPLY REQUIREMENTS
The LEMSA has the authority to inspect Selected Proposer's ambulances at any time,
without prior notice. If any ambulance fails to meet the minimum in-service requirements
as outlined in LEMSA policy, LEMSA may:
Immediately remove the ambulance from service until the deficiency is corrected if
the missing item is deemed a critical omission. The foregoing shall not preclude
dispatch of the nearest available ambulance, even though not fully equipped, in
response to a life-threatening emergency so long as another appropriately
equipped ambulance of at least equal level of service is also dispatched to the
scene.
Adopt protocols governing provisional dispatch of ambulances not in compliance
with minimum in-service requirements and Selected Proposer shall comply with
these protocols.
6.4 COMMUNICATIONS SYSTEMS
AMBULANCE COMMUNICATIONS EQUIPMENT
Selected Proposer will be responsible for purchasing/leasing, installing, and maintaining
all telecommunications equipment at the appropriate frequencies necessary to complete
the services described in this RFP.
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Selected Proposer shall equip each ambulance with one portable East Bay
Regional Communications System (EBRCS) radio for each crew member and one
EBRCS mobile radio.
Selected Proposer shall equip each ambulance with one mobile telephone.
The use of Automatic Vehicle Locators (AVLs), Mobile Data Computers (MDCs),
and Global Positioning System (GPS) mapping technology is required. The AVL
system must interface with the County Designated Communications Center
Computer Aided Dispatch (CAD) system. The Selected Proposer is responsible
for all costs associated with the purchase and ongoing operations of the AVL
system.
The AVL system must have a playback function that can retrosp ectively show all
unit locations and movement speed at any given time over the prior 30 -days.
Selected Proposer shall equip each ambulance, Quick Response Vehicle (QRV),
and field supervisor vehicle with a mobile computer with Mobile Data Computer
(MDC) capability, CAD access, mapping software, and the ability to send
electronic patient care records to the receiving hospital and a centralized server
via wireless technology. Each ambulance shall be equipped with AVL and GPS
fully interfaced to the CAD system for unit recommendation and System Status
deployment purposes.
Selected Proposer shall equip each ambulance with appropriate emergency
communications and alerting devices capable of being used to notify ambulance
personnel of response needs.
Communication equipment for ambulance-to-hospital communication must be
configured to allow the personnel providing direct patient care to communicate
directly with the base or receiving hospital staff about the patient.
Selected Proposer shall operate the two-way radios in conformance with all
applicable rules and regulations of the Federal Communication Commission, and
in conformance with all applicable LEMSA Medical Director rules and operating
procedures, data and reporting requirements.
6.5 TECHNOLOGY AND DATA MANAGEMENT
The Selected Proposer shall provide comprehensive operations, clinical, and
administrative data through an integrated data management system that supports both
retrospective analysis and real-time monitoring. This system must be capable of
seamless integration with the LEMSA data vendor FirstWatch to ensure ongoing
assessment of system health, enable data-driven decision-making, and facilitate efficient
data sharing across relevant platforms and stakeholders.
DISPATCH AND/OR RECORDS MANAGEMENT COMPUTER(S)
Any Records Management System utilized by Selected Proposer shall include security
features preventing unauthorized access or retrospective adjustment, and full audit trail
documentation.
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ESSENTIAL PATIENT CARE RECORD (PCR) AND ASSIGNMENT DATA
The Selected Proposer shall utilize LEMSA-approved electronic patient care report
(ePCR) for patient documentation on all EMS System responses in accordance with
LEMSA policies. The ePCR shall be accurately completed to include all information
required by established state and LEMSA policies and procedures. Selected Proposer
shall, at its expense, utilize FirstWatch to independently monitor response intervals and
to facilitate real-time and retrospective analysis of Selected Proposer’s response
capabilities and performance.
For every patient interaction, Patient Care Reports must be completed promptly following
the guidelines and deadlines set by the LEMSA, which are subject to change. Generally,
reports should be finalized no later than twelve hours after the incident or b y the end of
the shift in which the interaction occurred unless instructed otherwise. EMS clinicians
are also required to share all necessary patient information at the time of care transfer to
ensure seamless continuity of care. The Selected Proposer is responsible for
implementing robust administrative, physical, and technical safeguards to ensure the
confidentiality, integrity, and security of all patient data, in full compliance with HIPAA
security rules, the Health Information Technology for Economic and Clinical Health
(HITECH) Act, and any other applicable federal, state, and local regulations. At their own
cost, the proposer will maintain and upgrade these safeguards as necessary to address
emerging risks, ensure continuous protection of patient information, and adhere to
industry best practices for data security, including encryption, access control, and secure
data transmission.
RECORDS
Selected Proposer shall complete, maintain, and provide to LEMSA, if requested,
adequate records and documentation to demonstrate its performance compliance and
aid within the County in improving, modifying, and monitoring the EMS System.
6.6 NON-CLINICAL TRAINING
COMPANY ORIENTATION AND ONGOING PREPAREDNESS
Selected Proposer shall propose how they intend to properly orient all field personnel
before assigning them to respond to emergency medical requests. Such orientation
shall include at a minimum: provider agency policies and procedures; map reading skills
including key landmarks, routes to hospitals, and other major receiving facilities within
the County and in surrounding areas; and ambulance and equipment utilization and
maintenance. In addition, all frontline personnel must receive continual orientation to
customer service expectations, performance improvement, and the billing and
reimbursement process and compliance. Orientation shall include an EMS System
orientation provided by or approved by LEMSA.
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DRIVER TRAINING
Selected Proposer shall maintain an ongoing driver training program for ambulance
personnel. The program shall meet all requirements outlined in the applicable County
ordinance.
6.7 CRITICAL INCIDENT STRESS MANAGEMENT
Selected Proposer shall establish stress management and employee resilience
programs for its employees to include an ongoing stress reduction program, a critical
incident stress action plan, and reliable access to trained and experienced professional
counselors through an employee assistance program.
6.8 TREATMENT OF INCUMBENT WORK FORCE
A number of dedicated, highly trained personnel are currently working in the County EMS
System. To ensure a smooth transition and to encourage personnel to remain with the
system, the winning Proposer will be encouraged to recruit from the incumbent
paramedic and EMT workforce. Accordingly, the Proposer shall describe their plan to
recruit and hire the incumbent workforce, or as applicable, their plan to retain and
prevent attrition of incumbent workers.
CHARACTER COMPETENCE AND PROFESSIONALISM OF
PERSONNEL
The parties understand that ambulance services are often rendered in the context of
stressful situations. Selected Proposer shall address and follow provider agency
processes, LEMSA reporting policy, and all applicable Federal and State statutes and
regulations. All persons employed by Selected Proposer in the performance of its work
shall be competent and holders of appropriate licenses and permits in their respective
professions and shall undergo a criminal record check.
DISCRIMINATION NOT ALLOWED
During the performance of the Agreement, Selected Proposer agrees that it will comply
with all applicable provisions of federal, state, and local laws and regulations prohibiting
discrimination. Specifically, Selected Proposer warrants that it will fully comply with Title
VI and VII of the Civil Rights Act of 1964, as amended, the Americans with Disabilities
Act (ADA), and all other regulations promulgated thereunder. Selected Proposer will not
discriminate against any employee or applicant for employment because of race,
religion, color, disability, national origin, sex, sexual orientation, or age. Selected
Proposer will take affirmative action to ensure that employment is offered and that
employees are treated during employment without regard to their race, religion, color,
disability, national origin, sex, sexual orientation, or age. Such action shall include but is
not limited to the following: employment, upgrade, demotion or transfer, recruitment or
recruitment advertising, lay-off or termination, rates of pay or other forms of
compensation, and selection, including apprenticeship.
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6.9 DISASTER RESPONSE AND PREPAREDNESS
DISASTER RESPONSE PLANNING
Selected Proposer shall develop an internal disaster plan to accommodate staffing,
supplies, deployment, communications, and maintenance of normal operations for a
minimum of a 72-hour period. Selected Proposer shall develop a plan for immediate
recall of personnel during multi-casualty or widespread disaster. This plan shall include
a means for Selected Proposer to alert off-duty personnel.
DISASTER RESOURCES
Selected Proposer shall agree to house, staff, and deploy the EMS Authority issued
Disaster Medical Support Unit (DMSU). This unit shall only be deployed and used as
approved/directed by the Contra Costa County Medical Health Operational Area
Coordinator (MHOAC) or designee. The Selected Proposer shall have a reserve fleet of
ambulances as indicated in this RFP. These ambulances shall be in good working order,
and ready for immediate deployment. The Selected Proposer shall maintain a reserve
fleet of supervisor/support vehicles at 120% of peak deployed support units.
MULTI-CASUALTY/DISASTER RESPONSE
The Selected Proposer must fully cooperate with LEMSA in providing emergency
assistance during disasters or in response to multi-casualty incidents, as outlined in the
County's emergency plans. This includes participating in disaster preparedness planning
for the County's Operational Areas upon request through the appropriate channels. The
Selected Proposer must also adhere to the disaster medical health emergency
operations structure, following MHOAC directions from the LEMSA Director, County
Health Officer, or their designees.
MUTUAL AID REQUIREMENTS
Selected Proposer shall respond in a mutual aid capacity to other service areas outside
the County as directed by Contra Costa County MHOAC or designee. Should the
MHOAC request the Selected Proposer provide mutual aid outside the County,
exceptions shall be made for good cause only, as determined by LEMSA, including
automatic appeals and case-by-case appeals. The County has an agreement to provide
ambulance mutual aid with other jurisdictions within the region and State, by way of the
Mutual Agreement in Appendix 12.12. The Selected Proposer is expected to comply with
the terms of said Agreement when providing mutual aid as outlined in the Agreement.
EMERGENCY OPERATIONS PLAN
Selected Proposer shall be prepared to fulfill their role in the County’s Emergency
Operations Plan and Mass Casualty Incident (MCI) plans.
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CONTINUITY OF OPERATIONS PLAN
Proposers are required to detail in their proposal how they will ensure the continuity of
key administrative and operational functions in case of emergencies such as disasters,
fires, cyberattacks, or other external threats, to prevent service interruption s. The
proposal must outline plans for maintaining continuous access to crucial systems and
operations including computer and data systems, communication networks, medication
management (including environmental controls), electrical power, and vehicle ope rations
(including fuel), among other critical areas.
DISASTER REIMBURSEMENT
Selected Proposer will ensure all documentation meets FEMA eligibility and/or other
federal funding standards, policies, and guidelines when seeking mutual aid
reimbursement.
6.10 STANDBY SERVICE
IMMEDIATE NEED AT THE SCENE OF AN EMERGENCY
Selected Proposer shall provide, at no charge to County or requesting agency, standby
services at the scene of an emergency incident where there may be an imminent life
threat within its emergency response area upon request of a public safety agency. A unit
placed on standby shall be dedicated to the incident for which it has been placed on
standby until unit is cleared by requesting agency IC OR provider agency clears call for
911 system need as supported by LEMSA policy. Examples of these incidents include,
but are not limited to, law enforcement standbys, structure fire standbys, or hazardous
response events. When assigned to emergency scenes, Selected Proposer's personnel
shall operate under the primary responding agency's incident command structure.
PRE-SCHEDULED STANDBY SERVICES (PRIVATE BUSINESS)
Selected Proposer may provide standbys for events not deemed to be an emergency or
immediate need. The Selected Proposer shall propose an hourly rate for ALS and BLS
ambulances, as well as a non-transport rate. Examples of these events include, but are
not limited to, sporting events, festivals, or protracted emergency incidents such as large
wildfires.
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SECTION 7 – RESPONSE TIME PERFORMANCE STANDARDS
& PENALTIES
7.1 RESPONSE TIME PERFORMANCE, RELIABILITY &
MEASUREMENT METHODS
This Agreement is performance based; LEMSA will not limit Selected Proposer’s
flexibility in the methods of providing ambulance service. Therefore, an error on Selected
Proposer’s part in one phase of its operation (e.g. system deployment plan, ambulance
maintenance, etc.), shall not be the basis for an exception to Selected Proposer's
performance in another phase of its operation (e.g., clinical performance or response
time performance).
Appropriate response time performance is the result of a coordinated effort of Selected
Proposer's total operation and, therefore, is solely Selected Proposer's responsibility.
Response time shall be measured in minutes and integer seconds and shall be “time
stamped” by the County Designated Communications Center as to service request
notification. The County will collaborate with the Selected Proposer to ensure the
Selected Proposer's records can obtain timestamps from the same data source used by
the County Designated Communications Center.
7.2 RESPONSE TIME PERFORMANCE REQUIREMENTS
This RFP outlines four priorities with which Selected Proposer must comply by meeting
specified response times. The call classification as Priority 1 through 3 is accomplished
by presumptive Medical Priority Dispatch System (MPDS) determinant arrived at by the
County Designated Communications Center in concert with prescribed LEMSA response
policy. The call classification as Priority 4 is accomplished by presumptive prioritization
by the requesting entity. For response time monitoring, reporting, and compliance
purposes within the County, Selected Proposer's response time on requests for
ambulance service originating from within the service area shall meet the following
performance standards:
EMERGENCY RESPONSE ZONES (ERZ'S)
For the purposes of Ambulance staffing, Response Time monitoring, reporting, and
compliance, the Service Area has been divided into four (4) ERZ's. A set of Maps of the
County are provided in Appendix 12.2, attached hereto and incorporated herein by this
reference, that illustrate the following ERZs:
ERZ A: The territory of the City of Richmond.
ERZ B: The territories of the City of El Cerrito, Kensington Fire Protection District,
City of Pinole, Rodeo-Hercules Fire Protection District, Crockett-Carquinez Fire
Protection District, and that portion of the Contra Costa County Fire Protection
District covering San Pablo, El Sobrante, North Richmond, and other areas of
western Contra Costa County.
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ERZ C: That portion of the territory of Contra Costa County Fire Protection District
covering Walnut Creek, Concord, Clayton, Lafayette, Martinez, Pleasant Hill, and
other areas of central Contra Costa County.
ERZ D: That portion of the territory of Contra Costa County Fire Protection Dis trict
covering Antioch, Pittsburg, Bay Point, Oakley, Brentwood and unincorporated
areas of east Contra Costa County served by Contra Costa County Fire
Protection District.
RESPONSE DENSITY ZONES
For the purposes of Response Time monitoring, reporting, and compliance, the Service
Area has also been divided into two (2) Response Density Zones, High Density and Low
Density, as shown in the Incident Density Map, provided in the appendices, attached
hereto and incorporated herein by this reference. Upon Selected Proposer's request,
County shall provide this information as a map layer for use with geographic information
systems (GIS). Proposers shall provide example of their methodology when
assessing/monitoring their system compliance with Response Time Perf ormance. This
should include what QA systems will be in place and how those systems translate to
transparent QI systems including policy enforcement, policy change, remediation, and
visibility by leadership.
RESPONSE TIME CALCULATIONS
On a monthly basis, CCCEMSA shall use Response Time data from Selected Proposer's
CAD system via CCCEMSA's online compliance utility tool to calculate Ambulance
Response Times to determine compliance with the Response Time Standards described
in this RFP. Monthly calendar periods will be used to measure Response Time
compliance or calls to off-road locations; and extended delays at hospitals for
transferring patients to receiving facility personnel. Equipment failure, Ambulance failure,
lost Ambulance crews, failure to effectively manage Selected Proposer’s system status
plan, or other causes deemed to be within Selected Proposer's or its Ambulance
Subcontractor's control, or awareness are not grounds to grant an exemption to a
Response Time Standard. Selected Proposer will provide the LEMSA a monthly staffing
report for its core deployment schedule to ensure that Selected Proposer or
subcontractor is effectively attempting to fill all core scheduled ambulance shifts.
POTENTIALLY LIFE-THREATENING EMERGENCY RESPONSES
(PRIORITY 1)
Priority 1 calls are calls for a response to a potentially life -threatening situation and are
dispatched with emergency lights/sirens ("Priority 1"). When contacted by a PSAP with a
Priority 1 call originating in Selected Proposer's Service Area, Selected Proposer shall
place an ALS Ambulance on the scene with maximum Response Times as follows:
Ten minutes and zero seconds (10:00) to calls originating in ERZ A.
Eleven minutes forty-five seconds (11:45) to calls originating in ERZ's B, C, and D,
except for designated low-density areas.
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Sixteen minutes forty-five seconds (16:45) to calls in Bethel Island.
Twenty minutes and zero seconds (20:00) to calls in designated low-density
areas.
NON-LIFE-THREATENING EMERGENCY RESPONSES (PRIORITY 2)
When contacted by a PSAP with a Priority 2 call originating in Selected Proposer's
Service Area, Selected Proposer shall place an ALS Ambulance on the scene with
maximum Response Times as follows:
Fifteen minutes and zero seconds (15:00) in designated high -density areas.
Twenty minutes and zero seconds (20:00) to calls in Bethel Island.
Thirty minutes and zero seconds (30:00) in designated low-density areas.
NON-EMERGENCY RESPONSE (PRIORITY 3)
Priority 3 calls are calls for a response to a non-emergency ambulance situation and are
dispatched with no emergency lights/sirens ("Priority 3"). When contacted by a PSAP
with a Priority 3 call originating in Selected Proposer's Service Area, Selected Proposer
shall place an ALS or BLS Ambulance as indicated by LEMSA policy, on the scene with a
maximum Response Time as follows:
Thirty minutes and zero seconds (30:00) in designated high -density areas.
Forty-five minutes and zero seconds (45:00) in designated low-density areas.
NON-EMERGENCY INTERFACILITY ALS TRANSPORTS (PRIORITY 4)
Non-emergency interfacility transfers are categorized as scheduled with three hours ’
notice or scheduled with fewer than three hours’ notice.
If Selected Proposer receives a call for an ALS interfacility non-emergency
transport with at least three (3) hours’ notice, Selected Proposer shall place an
ALS Ambulance on the scene within fifteen minutes zero seconds (15:00) of the
scheduled pickup time.
If Selected Proposer receives a call for an ALS interfacility non-emergency
transport with less than three (3) hours’ notice, Selected Proposer shall place an
ALS Ambulance on the scene within sixty minutes zero seconds (60:00) of the
time of the request.
Zone or Criteria Priority 1 Priority 2 Priority 3 Priority 4
ERZ A 10:00 15:00 30:00 -
ERZ B 11:45 15:00 30:00 -
ERZ C 11:45 15:00 30:00 -
ERZ D 11:45 15:00 30:00 -
Bethel Island (ERZ D) 16:45 20:00 30:00 -
Low Density 20:00 30:00 45:00 -
Scheduled: 3-Hour Notice - - - 15:00
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Scheduled: < Than 3-Hour Notice - - - 01:00:00
7.3 EQUITY IN RESPONSE TIMES THROUGHOUT THE COUNTY AND
REPORTING PERIOD
The LEMSA recognizes that equity in response times is largely based upon call densities
within the County. In developing Response Time Equity Standards, the LEMSA has
aggregated all areas of the County into four (4) compliance zones. Superior response
time performance early in a month is not a reason or justification to allow inferior
response time performance late in the month. Therefore, the Selected Proposer shall
use its best efforts to minimize variations or fluctuations in response time performance
according to the day of week or week of month.
The LEMSA reserves the right to periodically review any specific area or time frame
within the month to identify if there are pockets of inequitable response time performance
and refer such findings to Selected Proposer for mitigation. While this requirement does
not change the method of calculating contractual response time requirements, Selected
Proposer will report its mitigation strategy to LEMSA within ten (10) business days.
Chronic patterns of response variation or Selected Proposer’s failure to address
significant variations may constitute a breach of the Agreement. The Selected Proposer
is responsible for managing time-sensitive aspects of the EMS system, including
ambulance patient off-load time (APOT), and providing detailed mitigation strategies to
the LEMSA when issues occur concerning APOT. Additionally, the Selected Proposer is
encouraged to work with Hospitals to create processes that facilitate rapid offload times.
Extended delays may lead to further review and collaboration between the Selected
Proposer and hospitals to address the root causes of the delays and improve the overall
system's efficiency.
7.4 RESPONSE TIME MEASUREMENT METHODOLOGY
Selected Proposer's response times shall be calculated on a monthly basis to determine
compliance with the fractal standard set forth in this RFP. The following are applicable:
TIME INTERVALS
For the purposes of the Agreement, response times shall be measured from the time of
alert by the County Designated Communications Center until arrival at incident location
by the first arriving transporting ambulance, or the unit is canceled by the calling party or
a public safety agency. Arrival at incident location means the moment that the vehicle is
fully stopped at the location where the ambulance shall be parked while the crew exits to
approach the patient.
In situations where the ambulance has responded to a location other than the scene
(e.g., staging areas for hazardous materials/violent crime incidents, non-secured scenes,
or wilderness locations), arrival at scene shall be the time the ambulance arrives at the
designated staging location or nearest public road access point to the patient ’s location.
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In instances when ambulances fail to report "at scene", the time of the next
communication with that ambulance shall be used as the "at scene" time (e.g., time at
patient). However, Selected Proposer may be able to document the actual arrival time
through other means (e.g., First Responder, AVL, communications tapes/logs, etc.) so
long as an auditable report of any edits is produced and submitted to LEMSA.
EACH INCIDENT A SEPARATE RESPONSE
Each incident will be counted as a single response regardless of the number of units that
are utilized. The response time of the first arriving transporting ambulance (as
appropriately assigned ALS or BLS response) will be used to compute the response time
for that incident. Note: a BLS unit arrival at an ALS designated assignment does not
stop the clock, nor will it be counted in the call count.
CALCULATING UPGRADES, DOWNGRADES, AND CANCELED
RESPONSES
From time-to-time, special circumstances may cause changes in call priority
classification. Response time calculations for determination of compliance with the
Agreement standards and penalties for noncompliance will be as follows:
Upgrades - If an assignment is upgraded prior to the arrival on scene of the
emergency ambulance (e.g., from Priority 2 to Priority 1), Selected Proposer’s
compliance and penalties will be calculated based on the shorter of:
o The total of the more stringent priority response time standard plus the time
already elapsed from the original call receipt; or
o The original, less stringent priority response time standard.
Downgrades - If a call is downgraded prior to arrival on scene of the emergency
ambulance (e.g., from Priority 1 to Priority 2), Selected Proposer’s compliance
and penalties will be determined by:
o If the time of the downgrade occurs after the emergency ambulance has
exceeded the more stringent priority response time Standard, the more
stringent higher priority standard will apply; or,
o If the time of the downgrade occurs before the emergency ambulance has
exceeded the more stringent priority response time standard, the less
stringent lower priority will apply. If the downgrade was justified in the sole
discretion of LEMSA, the longer standard will apply.
Reassignment Enroute - If an ambulance is reassigned enroute or turned around
prior to arrival on the scene (e.g., to respond to a higher priority request),
compliance and penalties will be calculated based on the response time standard
applicable to the assigned priority of the initial response. The response time clock
will not stop until the arrival of an emergency ambulance on the scene from which
the original ambulance was diverted. If an ambulance is diverted to a higher
priority call, the new incident begins at the time stamped “call received” for that
incident and not the time of the diversion.
Canceled Calls – If an assignment is canceled prior to arrival on the scene of the
emergency ambulance, Selected Proposer’s compliance and penalties will be
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calculated based on the elapsed time of alert by the County Designated
Communications Center to the time the call was canceled. Canceled calls will be
counted and included in the monthly compliance reports.
7.5 RESPONSE TIME REPORTING REQUIREMENTS
DOCUMENTATION OF INCIDENT TIME INTERVALS
Selected Proposer shall document all times necessary to determine total ambulance
response time. For compliance purposes, all times must be recorded by automated
timestamp in the Selected Proposer’s CAD, and all times must be auditable by AVL or
WAV file. Incident times shall include, but not be limited to:
Time call received by dispatch from County Designated Communications Center
Time Selected Proposer alerted
Time enroute to scene
Arrival at scene time
Arrival at patient’s side
Time enroute to transport destination
Arrival time at the destination
Time of patient transfer to receiving hospital personnel (transfer of care)
Time available at the destination (i.e., return to in-service status)
The Selected Proposer must synchronize the clocks on their Mobile Data Computer
(MDCs) devices in the Selected Proposer’s emergency vehicles with the Coordinated
Universal Time (“UTC”) time scale. UTC is the basis for civil time. This 24-hour time
standard is kept using highly precise atomic clocks combined with the earth's rotat ion.
RESPONSE TIME PERFORMANCE REPORT
Within ten (10) business days following the end of each month, the Selected Proposer
shall use the FirstWatch Online Compliance Utility tool to document and report to LEMSA
Director or designee, in the manner required by LEMSA, information as specified in the
Data and Reporting Requirements section of this RFP.
LEMSA shall use response time data in an ongoing manner to evaluate Selected
Proposer's performance and compliance with response time standards in an effort
to continually improve its response time performance levels.
Selected Proposer shall identify the causes of failures of performance and shall
document efforts in a manner required by LEMSA to eliminate these problems on
an ongoing basis.
Selected Proposer will be required to conduct a comprehensive performance
improvement process and submit it to LEMSA within ten (10) business days
following the identification of underperformance for two (2) consecutive months.
LEMSA will review and provide further recommendations as necessary prior to the
approval of any proposed corrective action, to include adjustments to the System
Status Plan or other measures to comply with the 90% requirement.
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7.6 RESPONSE TIME EXCEPTIONS AND EXEMPTION REQUESTS
EXEMPTION REQUESTS
Both the LEMSA and the Selected Proposer desire to reduce the number of exceptions
to response times granted under the Agreement. The Selected Proposer shall develop
and maintain mechanisms for backup capacity or reserve capacity to increase unit
availability should a temporary system overload persist. However, it is understood that
from time-to-time, unusual factors beyond Selected Proposer’s reasonable control affect
the achievement of specified response times standards. In some cases, late responses
can be excused from Response Time Compliance reports and penalties. Exceptions
shall be for good cause only as determined by the LEMSA, including automatic appeals
and case-by-case appeals.
RESPONSE TIMES OUTSIDE THE PRIMARY SERVICE AREA ARE
EXCLUDED
The Selected Proposer shall not be held accountable for emergency Response Time
Compliance for any assignment originating outside the awarded EOA. Responses to
requests for service outside the EOA will not be counted in the total number of calls use d
to determine compliance.
EXEMPTION REQUEST PROCEDURE
It is the Selected Proposer’s responsibility to apply to LEMSA for an exception to a
required response time, utilizing LEMSA-approved methods. If Selected Proposer
believes that any response or group of responses should be excluded from the
calculation of Response Time Compliance due to unusual factors beyond Selected
Proposer's reasonable control, the Selected Proposer must provide detailed
documentation for each actual response in question to LEMSA and request that LEMSA
exclude these runs from calculations. Any such request must be documented, submitted,
and received by LEMSA within ten (10) business days following the end of each calendar
month. A request for an exception received after the ten (10) business days will not be
considered. LEMSA will review each exception request and decide on approval or denial
and shall advise Selected Proposer of its decision. This decision shall be final.
If Selected Proposer believes that any response or group of responses should be
excluded from the calculation of Response Time Compliance due to unusual factors
beyond Selected Proposer's reasonable control, the Selected Proposer must provide
detailed documentation for each actual response in question to LEMSA and request that
LEMSA exclude these runs from calculations. Any such request must be in writing and
received by LEMSA within ten (10) business days following the end of each calendar
month. A request for an exception received after the ten (10) business days will not be
considered. LEMSA will review each exception request and decide on approval or denial
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and shall advise Selected Proposer of its decision. This decision shall be final. The
following exceptions shall apply:
In the monthly calculation of Selected Proposer's performance to determine
compliance with the Response Time Standards, every request for service shall be
included except those for which exceptions are being granted by the County.
Selected Proposer APOT exemptions will default to current contract compliance
process unless/until APOT exemption evolves collaboratively with Selected
Proposer and LEMSA. Equipment failure, traffic congestion not caused by the
incident, ambulance failure, lost ambulance crews, or other causes deemed to be
within the Selected Proposer’s control or awareness shall not be grounds to grant
an exception to compliance with the Response Time Standard.
Exemptions may be requested for the following:
o Major disaster/state of emergency
o Severe weather
o Local hospital diversion
o Lack of vehicular access to the patient
o Dispatch errors
o Unavoidable delay due to road construction or closure
o Unavoidable delay by train
o Unusual System Overload
o Good cause
7.7 PENALTY PROVISIONS FOR AMBULANCE RESPONSE TIME
PERFORMANCE
Isolated instances of individual deviations of response times are considered instances of
minor noncompliance with the Agreement. However, deviations of Response Time
Compliance, which are severe or chronic, may constitute a Default of t he Agreement as
defined by these specifications.
Failure to comply with any Response Time Interval, performance, or other requirements
in this RFP or the final Contract will result in non-compliant contract performance. It will
be impracticable to determine the actual amount of damage whether in the event of
delay, nonperformance, failure to meet standards, or any other deviation. Therefore,
Selected Proposer and LEMSA agree to the penalties specified herein. It is also
expressly understood and agreed that LEMSA’s remedies in the event of the Selected
Proposer’s breach or any noncompliance are not limited to this RFP, or the final Contract
penalty provisions. Chronic failure to comply with the Response Time Interval
requirements may constitute breach of contract.
FAILURE TO PROVIDE DATA TO DETERMINE COMPLIANCE
Selected Proposer shall pay the County $500 in penalties each and every time an
ambulance is dispatched, and the ambulance crew fails to report and document on -
scene time. In order to rectify the failure to report an on-scene time and to avoid the
penalty, the Selected Proposer may demonstrate to the satisfaction of LEMSA Director
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an accurate on-scene time provided documentation provided is in an auditable format
with an automated timestamp. The LEMSA may waive the penalties in its discretion for
good cause.
Where an on-scene time for a particular emergency call is not documented or
demonstrated to be accurate, the response time for that call shall be deemed to have
exceeded the required response time for purposes of determining Response Time
Compliance.
FAILURE TO COMPLY WITH RESPONSE TIME REQUIREMENTS
County may levy and Selected Proposer shall pay LEMSA penalties each and every
month that the Selected Proposer fails to comply with the response time requirements for
each Compliance Zone (1 through 4). Penalties will be applied on a percentage of
compliance for each zone according to the following schedule:
Emergency Ambulance Requests - Priority 1 Responses for each ERZ
Compliance % Penalty
89% – < 90% $15,000
88% – < 89% $25,000
<88% $50,000
Emergency Ambulance. Requests - Priority 2 Responses for each of the ERZ
Compliance % Penalty
89% – < 90% $5,000
88% – < 89% $10,000
<88% $15,000
Emergency Ambulance Requests - Priority 3 Responses for each of the ERZ
Compliance % Penalty
89% – < 90% $2,500
88% – < 89% $5,000
<88% $7,500
Non-Emergency ALS lnterfacility Transports - Priority 4 Responses for the entire Service
Area
Compliance % Penalty
89% – < 90% $4,000
88% – < 89% $6,000
<88% $7,500
Outlier Response Time Penalties
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Priority Level High-Density
Call
Low-Density
Call Penalty
Priority 1 > 18:59 > 29:59
$1,500 for each
response
exceeding 1% of
total Priority 1
responses.
Priority 2 > 22:59 > 44:59
$1,000 for each
response
exceeding 1% of
total Priority 2
responses.
Priority 3 > 39:59 >59:59
$750 for each
response
exceeding 1% of
total Priority 3
responses.
Priority 4
> 29:59 late for
scheduled
> 89:59 late for
unscheduled
>59:59
$500 for each
response
exceeding 1% of
total Priority 4
responses.
PENALTY FUND
The funds generated through penalties will be placed in a fund for future EMS System
Enhancements approved jointly by LEMSA Director and LEMSA Medical Director.
PHASE-IN OF PENALTY PROVISIONS
The LEMSA’s goal is to ensure a high-performance EMS System is in place. This
represents a system that has high expectations for Selected Proposer performance
rather than one that provides for penalties as a normal part of operations. It is
anticipated for this RFP that the successful Proposer will perform above standard, and
penalties will rarely be assessed.
The LEMSA will require the Selected Proposer to implement a Performance
Improvement Plan that includes root cause analysis for any compliance zone falling
below 90% for two (2) consecutive months. The Performance Improvement Plan will be
reported to and reviewed by LEMSA before the implementation of a corrective action
plan.
The LEMSA believes that at the beginning of a new service contract all attempts should
be made to comply with Response Time Standards such as System Status Plan
adjustments or increased staffing of ambulances prior to assessing any penalties,
therefore, imposition of the penalties for ambulance responses will be in effect beginning
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the third month of service provided by the Selected Proposer, i.e., If the contract begins
in January, the first month penalties will be assessed is March.
PENALTY DISPUTES
Selected Proposer may appeal to the LEMSA Director in writing within (10) business
days of receipt of notification of the imposition of any penalty or regarding LEMSA’s
penalty calculations. Appeals to LEMSA received after (10) days will not be recognized
and will not be subject to any appeal process.
In the event that the Selected Proposer continues to dispute any penalties assessed by
the LEMSA related to response time compliance after an appeal has been denied, the
Selected Proposer may submit a formal appeal for review by an independent third-party
adjudicator. The appeal process shall commence within thirty (30) days of the penalty
assessment, during which the Selected Proposer must present supporting
documentation and evidence substantiating their claim that the pe nalty was unfairly
assessed.
The third-party adjudicator, mutually agreed upon by both the Selected Proposer and the
County, shall have the authority to review the evidence and issue a binding decision. The
adjudicator’s review will consider any extenuating circumstances, including but not
limited to extraordinary weather events, unanticipated road conditions, or other
emergencies that may have impacted response times.
Both parties agree to comply with the adjudicator’s final determination, and any penalty
adjustments will be made accordingly. All costs associated with the adjudication process
shall be equally shared between the Selected Proposer and the County unless otherwise
decided by the adjudicator.
INCENTIVE FOR SUPERIOR CLINICAL PERFORMANCE
Should the Selected Proposer provide clinical performance above the base standards as
outlined in this RFP, LEMSA may, at its option, reduce damages for the month as
described.
ONLINE COMPLIANCE UTILITY
For the purposes of automated and objective performance tracking, the County uses an
online compliance utility (OCU), currently FirstWatch. Proposals shall confirm that
Proposers can export data (e.g., CAD, electronic patient care reports [ePCR]) to the
OCU service that the County will utilize for response time tracking, exemption
automation, real-time performance dashboard, ePCR interface, clinical performance, and
custom protocols as needed.
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SECTION 8 – ADMINISTRATIVE STAND ARDS
8.1 COMMUNITY ENGAGEMENT
Selected Proposer will take significant steps to improve injury prevention and system
access through community education programs provided to the school system and
community groups. It is LEMSA’s expectation that Selected Proposer will plan such
programs working collaboratively with other public safety and EMS-related groups such
as the American Heart Association, American Stroke Association, the American Red
Cross, and area healthcare organizations.
Selected Proposer shall ensure EMS services are provided without prejudice or implicit
bias. Selected Proposer shall develop internal mechanisms to assess for implicit bias in
the provision of EMS delivery. Selected Proposer shall develop and maintain internal
education and awareness programs to address any perceived or actu al deficiencies in
this area. Additionally, Selected Proposer shall ensure field staff have access to a 24/7
language translation line that includes all languages spoken within the County. Selected
Proposer will work with LEMSA to ensure the provision of EMS services is conducted in
a manner that is equitable, ensuring all those who call for service receive the same level
of clinical excellence.
Selected Proposer shall annually plan and implement a definitive and collaborative
community education program, which shall include identifying of and conducting
presentations to key community groups which influence the public perception of the EMS
System’s performance, conducting citizen CPR training events, participating in EMS
week and other educational activities involving prevention, system awareness/access,
and appropriate utilization of the EMS System.
Selected Proposer shall specify how many hours per month it will commit to community
education as outlined herein. Selected Proposer shall annually undertake at least one
significant project that shall demonstrably improve the health status in the community.
Health status improvement programs targeted to “at-risk populations” may include, but
are not limited to, seat belt use, child safety seat use, bike safety program, participation
in NTHSA Safe Communities Program, CPR training, 911 awareness, gun safety, hunting
safety, drowning prevention, equestrian accident prevention, senior safety/fall prevention
program, or home hazard inspection program. Selected Proposer is to use their best
efforts to obtain external grant funding for health status improvement projects.
The Selected Proposer shall assess and address gaps in Automated External
Defibrillator (AED) coverage within Contra Costa County by investing $100,000 in AEDs
annually. Activities associated with this include conducting comprehensive assessments
to identify underserved areas, engaging with community stakeholders to determine
optimal AED placement, facilitating the acquisition and instal lation of AEDs, and
providing necessary training and maintenance to ensure operational readiness. The
proposer is expected to collaborate with local businesses, schools, places of worship,
and other community organizations to expand AED accessibility and coverage.
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The Selected Proposer will support Richmond Fire Department in becoming an ALS
service. Once Richmond Fire Department becomes an ALS service, response time
requirements will be adjusted in Zone A from 10:00 to 11:45.
8.2 PATIENT EXPERIENCE EVALUATION
THIRD-PARTY PATIENT EXPERIENCE SURVEYING
Selected Proposer shall deploy at its own expense a third-party patient experience
surveying tool that provides patients with an opportunity to provide feedback regarding
their experience with the Selected Proposer's service and generate a monthly report.
The tool shall provide patient experience performance data for each employee that
provided care to patients who completed the survey during the survey period. Input into
the survey tool development, and monthly results/reports from surveys, shall include
LEMSA.
PATIENT PERCENTAGE
At a minimum, 5% of patients who receive care from the Selected Proposer shall receive
a survey. Businesses and congregate care living facilities may be excluded.
TIMEFRAME
The survey shall be conducted within fifteen (15) calendar days of the service delivery
date and done so separately from the ambulance bill.
8.3 CUSTOMER SERVICE HOTLINE AND COMPLAINT PROCESS
CUSTOMER ACCESS HOTLINE
Selected Proposer shall establish and publish a Customer Access Hotline (including an
online complaint process) giving internal and external customers and system participants
the ability to contact a designated liaison of the Selected Proposer’s leadership team to
discuss commendations or suggestions for service improvements. The number may
either be answered by a designated manager, or provide an opportunity for the caller to
leave a voicemail message.
NUMBER PUBLICATION
The hotline number will be published on LEMSA’s website, the Selected Proposer
website, publicized at local healthcare facilities, fire stations, and public safety agencies.
The Selected Proposer shall be responsible for monitoring and maintaining this number
to ensure its continued operability.
NOTIFICATION
Members of the Selected Proposer’s Leadership Team are to be automatically notified
via pager/text message of any incoming calls. A management designee must return the
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call to the customer within 30 minutes, 90% of the time. If feedback is requested or
required, it must be provided by the end of the next business day.
DOCUMENTATION
Third-party software/service will be utilized. At a minimum, the service should
automatically capture relevant timestamps and document the complaint and its
disposition.
COMPLAINTS
Complaints shall be reported to the LEMSA concordant with established LEMSA policies.
Selected Proposer shall also provide a quarterly complaint report that aggregates
complaints categorically, e.g., operational, customer service, clinical, patient injury, etc.
no later than ten (10) business days following the end of the quarter.
8.4 EMPLOYEE SAFETY AND WELLNESS
The Selected Proposer shall have an employee wellness program and health screenings
that are designed to help employees improve their overall physical health. Selected
Proposer shall develop an infection prevention program that emphasizes aggressive
hygiene practices and proactive personal protective equipment donning (e.g., eye
protection, gloves, etc.). Selected Proposer shall maintain and strictly enforce policies for
infection control, cross-contamination, and soiled materials disposal to decrease the
chance of communicable disease exposure and transmission. Selected Proposer shall
develop an injury prevention program to reduce work injuries such as back injuries with
the use of a power assisted gurney and other employee safety measures.
8.5 INTERNAL RISK MANAGEMENT PROGRAM REQUIREMENTS
Education and intentional prevention of conditions in which accidents occur is the best
mechanism to avoid injuries to Selected Proposer staff and patients. Therefore, LEMSA
requires Selected Proposer to develop and implement comprehensive health, safety, and
loss mitigation program within six (6) months initiation of service under the resulting
Agreement, including at a minimum:
Pre-screening of potential employees (including drug testing).
Initial and ongoing driver training.
Lifting technique training.
Hazard reduction training.
Reviewing employee health/infection control related information such as needle
sticks, employee injuries, immunizations, exposures and other safety/risk
management issues, and involvement of employees in planning and executing its
safety program.
Planning for safety and risk mitigation program that will include, at a minimum:
o Gathering data on all incidents that occur within Selected Proposer
workforce.
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o Analyzing the data to find causative factors and determine preventive
measures.
o Devising policies prescribing safe practices and providing intervention in
unsafe or unhealthy work-related behaviors.
o Gathering safety information as required by law.
o Implementing training and corrective action on safety related incidents, as
required by law.
o Providing initial and ongoing training on those practices and interventions.
o Providing safe equipment and vehicles.
o Monitoring the results of employee compliance or noncompliance with the
safety plan and refine the plan as new information becomes available.
8.6 COMMUNICABLE DISEASES, SAFETY, AND PREVENTION
The Selected Proposer shall have a Communicable Disease Policy that complies with all
Occupational Safety and Health Administration (Cal-OSHA) requirements and other
regulations related to communicable diseases prevention, reporting of exposure, and
disposal of medical waste. All prehospital personnel shall be trained in prevention,
personal protective equipment, and universal precautions.
Selected Proposer shall make available at no cost to its employees all currently
recommended and required immunizations and health screening to its high -risk
personnel. Selected Proposer shall assign a locally (local to Contra Costa County)
employed Communicable Disease point-of-contact with investigative rights, as outlined in
LEMSA policy.
8.7 KEY PERSONNEL
The LEMSA requires that the Selected Proposer and any applicable transport
subcontractors ensure a safe, respectful, tolerant, and culturally diverse workplace for all
employees, including those of any subcontractors who provide services to the County
under this Contract.
Selected Proposer shall have a management staffing plan to oversee all aspects of
ambulance service including administration, operations, continuing education, clinical QI,
record keeping, and field supervision, and Selected Proposer shall provide the
qualifications, including resumes and job descriptions, for all management, clinical and
supervisory personnel for the ambulance service.
Proposer shall specifically explain their management staffing model showing how they
intend to monitor and continuously improve both clinical and operat ional performance.
This is to outline span of control and ensure employees are operating professionally and
competently.
Proposer must have a position dedicated and responsible for contract compliance.
This position must be employed by the contracting entity.
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Required management positions locally employed by the entity providing ambulance
transport (Proposer or Proposer’s subcontractor) and assigned within Contra Costa
County shall include:
Operations Manager/Director: A full-time individual dedicated specifically to
overseeing EMS Operations in Contra Costa County as their primary role. This
individual shall have significant prior experience managing a large, high-
performance 9-1-1 EMS System.
Clinical Manager: A paramedic or nurse with extensive experience in emergency
and critical care with experience working clinically sophisticated 9-1-1 ALS
emergency ambulance services system. This individual shall be full-time and
dedicated to Contra Costa County and shall be responsible for day-to-day clinical
oversight of all of Selected Proposer’s clinical services, including clinical
investigations, new hire orientation, initial and continuing education, employee
development, clinical quality assurance, and continuous quality improvement. The
Clinical Manager or their designee will be immediately available to field personnel.
Provider Physician Medical Advisor: An EMS Board-Certified Physician. This
individual shall participate in provider CQI, education and training, and be
accessible to field employees. This individual is not required to be a full-time
employee of the organization but must have minimum of 20 hours per week
dedicated to proposer’s ambulance operation.
Field Supervisors: Selected Proposer shall utilize field supervisors for the direct
supervision of field personnel. These individuals will ensure that field personnel
maintain the highest level of professionalism, patient care, and customer service
for all services provided.
o These individuals shall be credentialed by LEMSA as paramedics.
o There shall be an appropriate number of Field Supervisors to cover the
geography with a reasonable span of control and provide an immediate
response for field incidents.
o Selected Proposer shall have a written program which clearly describes the
eligibility criteria, training, roles and responsibilities of field supervisors.
o On-duty Field Supervisors shall not be regularly scheduled on ambulances
and shall be available to and cooperate fully with LEMSA and EMS System
partners.
o First Responder Liaison: Selected Proposer shall designate from among its
employees a single individual as its contact person/liaison for the First
Response agencies within each response zone.
o The proposer shall identify the individual within the organization’s
management staff who will have investigative authority, meaning those who
will be responsible for conducting investigations, gathering and analyzing
relevant information, and making determinations or recommendations
based on their findings
Finance - This encompasses financial reporting, revenue cycle accountability,
patient accounts, and customer service.
Employment - This area deals with employee safety, health, physical and mental
wellness, compliance with workforce and labo r laws, and adherence to OSHA
standards.
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Compliance - It includes having a designated privacy officer and a compliance
officer, who should have the appropriate certifications relevant to the EMS
industry.
Contract Administration - This involves being the contact point for LEMSA staff,
County staff, and contracting officials, and managing legal and other related
issues concerning contract administration.
8.8 REPORTS REQUIRED
Unless otherwise stated, the Selected Proposer shall provide, within ten (10) business
days after the first of each calendar month, reports dealing with its performance during
the preceding month as it relates to the clinical, operational, and financial performance
stipulated herein. Selected Proposer shall document and report to the County
electronically or in writing in a form approved by LEMSA Director. Response time
compliance and customer complaints/resolutions shall be reported monthly in a manner
approved by LEMSA.
Detailed descriptions of specific clinical performance measures are provided in Appendix
12.7. Reports shall include, at a minimum, the individual reports bulleted below:
CLINICAL
Clinical Scorecard
Continuing education reports (Annually)
Spreadsheet including summary of clinical inquiries and resolutions
Other QI statistical information reported as requested by LEMSA
OPERATIONAL
Summary of periodic and temporary unit/deployment changes
Summary of any operational issues
Summary of systemic errors that impacted service delivery
o System Status Management errors
o Communication/Technological system errors
o Other relevant issues
Summary of interrupted calls due to vehicle/equipment failures
Community education events (Annually)
PR activities and government relations report (Annually)
Other reports as requested by LEMSA
ADMINISTRATIVE
Financial Report, to be conducted Quarterly (unaudited financial and loss
statement)
Yearly audited financial report
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Billing Report, to be conducted Quarterly:
o Ambulance Bill Collection rate
o Number of patients sent to collections
Patient Satisfaction Report
Customer Hotline Report
Personnel Report
Reporting of individuals separated from employment must occur within 3 business
days from date of separation
List of active paramedics and EMTs
Attrition report
Other reports as requested by LEMSA
This is not meant to be a complete listing of all required reports nor the frequency with
which they are required. The LEMSA reserves the right to request additional reports
within the same or different time frames. Selected Proposer shall comply with all
reporting requirements.
PARTICIPATION IN SYSTEM DEVELOPMENT AND ENHANCEMENTS
LEMSA anticipates further development of its EMS System and regional efforts to
enhance disaster and Mutual Aid response. The LEMSA requires that its Selected
Proposer actively participate in regional EMS activities and work groups. Contractor
agrees to participate and assist in the development of system changes subject to
negotiated costs, if any.
During the term of a contract resulting from this RFP, the Selected Proposer shall
participate in studies to determine the efficacy and financial viability of implementing
preventative services and alternative solutions that match individual healthcare nee ds
with efficacious and fiscally responsible service for aging, at risk, and mental health
patient populations.
Preventative services and alternative solutions include but are not limited to,
communications center nurse triage systems, clinical computerized decision support
systems, community paramedic programs, alternative destination procedures, “Treat No
Transport” protocols, and field telehealth use. All services, solutions and programs shall
be medically guided, approved by the LEMSA Medical Directo r and shall have a
comprehensive evaluation process to assess patient outcomes to ensure employee and
patient safety. Any solution requiring communications center systems, if implemented,
shall use EMD protocols and shall be approved by LEMSA Medical Dire ctor.
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SECTION 9 – REGULATORY COMPLIANCE AND FINANCIAL
STANDARDS
9.1 FEDERAL HEALTHCARE PROGRAM COMPLIANCE PROVISIONS
Selected Proposer shall comply with all applicable federal laws, rules, and regulations for
operation of its enterprise, ambulance services, and those associated with employees.
MEDICARE COMPLIANCE PROGRAM REQUIREMENTS
Selected Proposer shall implement a comprehensive Compliance Program for all
activities, particularly those related to documentation, claims processing, billing, and
collection processes. Selected Proposer’s Compliance Program shall substantially
comply with the current regulatory approach program outlined in the Office of Inspector
General (OIG) Compliance Program Guidance for Ambulance Suppliers as published in
the Federal Register on March 24, 2003 (03 FR 14255).
HIPAA COMPLIANCE PROGRAM REQUIREMENTS
Selected Proposer is required to implement a comprehensive plan and develop the
appropriate policies and procedures to comply with the provisions of the Health
Insurance Portability and Accountability Act of 1996 and the current rules and regulations
enacted by the Department of Health and Human Services. The three major
components of HIPAA include:
Standards for Privacy and Individually Identifiable Health Information.
Health Insurance Reform: Security Standards.
Health Insurance Reform: Standards for Electronic Transaction Sets and Code
Standards.
Selected Proposer is responsible for all aspects of complying with these rules and
particularly those enacted to protect the confidentiality of patient information. Any
violations of the HIPAA rules and regulations will be reported immediately to
LEMSA/County, along with Selected Proposer’s actions, to mitigate the effect of such
violations.
9.2 STATE AND LOCAL REGULATIONS
Selected Proposer shall be familiar with and comply with all applicable state and local
laws, rules, and regulations for businesses, ambulance services, and those associated
with employees. Selected Proposer shall also be familiar with and comply with local
ordinance, LEMSA policies, procedures, and protocols. Selected Proposer is
responsible for complying with all rules and regulations associated with providing
services for recipients of and being reimbursed by medical and other state and federally
funded programs.
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9.3 PATIENT CHARGES AND REVENUE
The primary means of Selected Proposer compensation is through fee-for-service
reimbursement of patient charges.
PATIENT CHARGES
Selected Proposer shall receive income from patient charges. Selected Proposer shall
comply with fee schedules and rates proposed in response to this RFP, negotiated with
LEMSA, and subsequently approved by the County Board of Supervisors. The current
rates are included in appendix 12.3. These patient charges shall be the maximum
allowed amount.
FEE INCREASES
The County’s intent for this Agreement is to provide a business model that will provide
high quality, stable, long-term, efficient and cost-effective emergency and advanced
life support (“ALS”) ambulance services including 9-1-1 emergency response and 7-
digit emergency response within the County.
User Fees may be increased annually to adjust for inflation. No later than forty-five days
prior to each adjustment date, the Contractor may request the EMS Agency Director
consider approval of a User Fee adjustment.
When requested by selected proposer, the County Contract Administrator sha ll approve
annual increases to the higher of either:
5%
A percentage calculated as follows: the average Medical CPI for the most recent
and available three-year period, divided by the following: the average dollar
amount received by selected proposer from non-public payers for the most recent
three-year billing period divided by the average dollar amount received by
selected proposer from all payers for the most recent Mature three-year billing
period.
Notwithstanding the foregoing, in no event shall the maximum increase exceed nine
percent.
In the event that changes occur within the County that substantially impact the
Contractor’s ability to provide services, such that CPI-based rate adjustments do not
compensate for the increased cost of operating the 911 ambulance service, the
Contractor may request an additional User Fee increase, which shall be subject to
approval by the Contra Costa County Board of Supervisors.
The EMS Agency reserves the right, in its sole discretion, to conduct an audit
whenever the Contractor requests a fee increase in excess of ten percent (10%). The
purpose of the audit is to conclude whether the Contractor is complying with the
financial and operational terms and conditions of the contract. The EMS Agency will
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hire the auditor and the cost of the audit will be paid by the Contractor. The auditor will
identify key agreement terms and conditions, and review the related documentation (e.g.,
invoices, agreement amendments, regulatory requirements, accounting records, financial
reports, correspondence). the audit report will provide findings, conclusions and
recommendations related to the contractor's compliance. failure of the contractor to
comply fully with the audit shall result in denial of the requested user fee increase.
RATE REDUCTION
The Selected Proposer shall describe under what circumstances its proposed rate would
be reduced, or alternatively, under what circumstances excess funds would be
reinvested in the EMS System’s development.
9.4 BILLING/COLLECTION SERVICES
The Selected Proposer shall maintain a business presence within Contra Costa County.
Selected Proposer shall operate a billing and accounts receivable system that is well
documented, easy to audit, and which minimizes the effort required of patients to recover
from third-party sources for which they may be eligible. The billing system shall:
Comply with all Federal, State, and Local regulations.
Automatically generate Medicare and Medical statements.
Be capable of responding to patient and third-party payer inquiries regarding
submission of insurance claims, dates and types of payments made, itemized
charges, and other inquiries.
Make no attempts to collect its fees at the time of service.
9.5 BILLING SYSTEM PROFESSIONALISM AND REGULATORY
COMPLIANCE
The Selected Proposer shall conduct all billing and collection functions for the EMS
System in a professional and courteous manner.
9.6 ACCOUNTING PROCEDURES
INVOICING AND PAYMENT FOR SERVICES
LEMSA shall render its invoice for any fines, penalties, or other fees to the Selected
Proposer within ten (10) business days following Selected Proposer’s completion or
validation of reports or data. The Selected Proposer shall pay LEMSA on or before the
30th day after receipt of the invoice. Any disputes regarding the invoiced amounts
should be resolved in this thirty-day period. If they have not been resolved to LEMSA or
Selected Proposer’s satisfaction, the invoice shall be paid in full and subsequent invoices
will be adjusted to reflect any further resolution of disputed amounts.
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AUDITS AND INSPECTIONS
The Selected Proposer shall maintain separate financial records for services provided
pursuant to the Agreement in accordance with generally accepted accounting principles.
With reasonable notification and during normal business hours, LEMSA shall have the
right to review any and all business records including financial records of Selected
Proposer pertaining to the Agreement.
All records shall be made available to LEMSA at their local office or other mutually
agreeable location. LEMSA may audit, copy, make transcripts, or otherwise reproduce
such records, including but not limited to contracts, payroll, inventory, personnel and
other records, daily logs, and employment agreements.
On an annual basis, the Selected Proposer shall provide LEMSA with audited financial
statements by certified public accountants for the Selected Proposer's ambulance
operations and/or separate business records of financial accounting of any other
businesses that share overhead with the Selected Proposer's ambulance service
operation. In its sole and exclusive discretion, the LEMSA will permit non-private entities
to meet this requirement in an equivalent manner as specified in the Provision for
Fairness in Government/Private Competition document in Appendix 12.13. A
governmental entity, if awarded the Agreement, will be required to account for funds in
such a manner that complies with General Accounting Standards Board principles.
The financial position and results of operations under the Agreement shall be presented
in such a manner, as if that agency were a for profit commercial corporate enterprise.
Such funds must include all assets necessary to deliver the contracted service or absorb
a reasonable cost allocation for use of assets belonging to ot her funds or account
groups. Selected Proposer will be required by LEMSA to provide LEMSA with periodic
report(s) in the format approved by LEMSA to demonstrate billing compliance with
approved/specified rates.
9.7 INSURANCE PROVISIONS
The Selected Proposer shall keep in effect during the entire term of the Contract and any
extension or modification of the Contract insurance policies meeting the insurance
requirements set forth in Appendix 12.10 unless otherwise expressed in the Contract. A
comprehensive set of insurance documentation illustrating mandatory coverage must be
physically located at Selected Proposer’s headquarters and available for LEMSA review
at all times throughout the contract.
Before an award can be made, Proposers must submit documentation, including an
insurance certificate and an additional insured certificate that names the County and
meets the RFP's minimum insurance requirements. If a Proposer self-insures for any of
the coverages outlined in the RFP, they must provide adequate proof for the County to
independently determine if the coverage requirements are met.
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TERMS & CONDITIONS IN THE EVENT OF ANY POSSIBLE FUTURE
CONTRACT
Proposers agree to be bound by the County’s terms and conditions for independent
contractors included in the attached Template for Agreement for Services of Independent
Selected Proposer in the appendices, including the indemnification and insurance
requirements included therein.
9.8 PERFORMANCE SECURITY
The Proposer must be able to obtain and maintain in full force and effect, to LEMSA ’s
satisfaction, throughout the term of the Agreement, a performance guarantee equivalent
to six (6) months of operating expenses, which shall be in no event less than fi ve (5)
million dollars. The performance security shall be in the form of cash, letter of credit, or
performance security bond, or in another form approved by the LEMSA. Proposers shall
describe how they meet this requirement if different from the performance bond option
below.
A performance bond must be issued by a bonding company, which is an Admitted Surety
Insurer under the provisions of Title 14, Chapter 2, Article 6 of the Code of Civil
Procedure, commencing with Section 995.610 et seq., and licensed to conduct the
business of insurance in the State of California. Such performance bond, including the
bonding company issuing the bond, shall be acceptable in form and content to the
County.
A governmental entity, if awarded the Agreement, will be required to account for funds in
such a manner that complies with General Accounting Board principles and is accepted
by the County’s Auditor-Controller’s office. Such funds must include all assets necessary
to deliver the contracted service or absorb a reasonable cost allocation for use of assets
belonging to other funds or account groups.
NON-CANCELLATION
The Selected Proposer must furnish a performance bond or letter of credit that cannot be
canceled without giving the LEMSA thirty (30) days’ written notice. If the bond or letter of
credit is to be canceled, the Selected Proposer must supply a replacement security,
approved by the LEMSA, within twenty (20) days after the thirty-day notice period
begins. Additionally, if the guarantor/surety faces liquidation or conservatorship, the
Selected Proposer must provide a new, acceptable security to the LEMSA within twenty
(20) days of the event.
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SECTION 10 – DEFAULT, TERMINATION AND OTHER
GENERAL PROVISIONS
10.1 CONTINUOUS SERVICE DELIVERY
Selected Proposer expressly contracts that, in the event of a breach by Selected
Proposer under the Agreement, Selected Proposer will work with LEMSA to ensure
continuous and uninterrupted delivery of services, regardless of the nature or causes
underlying such breach. Selected Proposer agrees that there is a public health and
safety obligation to assist LEMSA in every effort to ensure uninterrupted and continuous
service delivery in the event of a default, even if Selected Proposer disagrees with the
determination of default.
10.2 DEFAULT AND PROVISIONS FOR TERMINATION OF THE
AGREEMENT
DEFINITIONS OF BREACH
Conditions and circumstances that shall constitute a material breach by Selected
Proposer shall include but not be limited to the following:
Continued failure of Selected Proposer to operate the ambulance service system
in a manner which enables LEMSA or Selected Proposer to remain in substantial
compliance with the requirements of the applicable Federal, State, and local laws,
rules, and regulations. Minor infractions of such requirements shall not constitute
a material breach unless there are willful and repeated breaches.
Falsification of data supplied to LEMSA and/or the State of California by Selected
Proposer during the course of operations, including by way of example but not by
way of exclusion, dispatch data, patient report data, response time data, financial
data, or falsification of any other data required under Contract.
Continued failure by Selected Proposer to maintain equipment in accordance with
acceptable maintenance practices.
Deliberate, excessive, and unauthorized scaling down of operations by Selected
Proposer to the detriment of performance during a "lame duck" period.
Continued attempts by Selected Proposer to intimidate or otherwise punish
employees who desire to sign contingent employment contracts with competing
Proposers during a subsequent procurement cycle.
Continued attempts by Selected Proposer to intimidate or punish employees who
participate in protected concerted activities, or who form or join any professional
associations.
Chronic and persistent failure of Selected Proposer's employees to conduct
themselves in a professional and courteous manner, or to present a professional
appearance.
Continued failure of Selected Proposer to comply with approved rate setting,
billing, and collection procedures.
Repeated failure of Selected Proposer to meet response time requirements after
receiving notice of noncompliance from LEMSA.
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Failure of Selected Proposer to provide and maintain the required insurance and
performance security bond.
Failure of Selected Proposer to comply with the vehicle provisions.
Continued failure of Selected Proposer to meet minimum equipment standards for
ambulances.
Failure of Selected Proposer to comply with or exceed the minimum employee
wage/salary benefit package as submitted; or,
Continued and repeated material breaches of Selected Proposer's backup
provisions.
CURE OF MATERIAL BREACH
Notification and Cure Process:
o In case of a material breach, the County must notify the Selected Proposer
in writing, detailing the breach's specifics.
o Unless the breach poses an immediate public health threat (as determined
by the LEMSA Director), the Selected Proposer has 60 days from notice
receipt to remedy the breach. Within 24 hours of notice receipt, the
Selected Proposer must submit a corrective action plan to LEMSA.
o Failure to address the breach or submit the plan timely may lead County to
terminate contract and LEMSA to assume control of the Selected
Proposer's operations covered under this agreement, with full cooperation
required for a smooth transition.
Litigation Rights:
o The Selected Proposer can contest the material breach finding through
litigation. However, this does not hinder the County's immediate operations
takeover during the emergency.
Effects on Selected Proposer Rights:
o Supporting the emergency takeover does not mean the Selected Proposer
agrees with the breach finding, nor does it affect their right to later contest
the breach declaration in court. However, not fully assisting the County in
the takeover can be deemed a material breach in itself, even if the original
breach declaration is later found incorrect.
Termination for Non-Emergency Breaches:
o For breaches not threatening public health or unresolved breaches by
either party, the parties may mutually agree to early contract termination as
an alternative resolution.
10.3 TERMINATION
FAILURE TO PERFORM
The County Board of Supervisors, upon written notice to Selected Proposer, may
terminate this Contract and provide thirty (30) days’ notice should Selected Proposer fail
to perform properly any of its obligations following notice from LEMSA. In the event of
such termination, the LEMSA may proceed with the work in any reasonable manner it
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chooses. The cost to LEMSA of completing Selected Proposer's performance shall be
deducted from the Selected Proposer’s performance bond without prejudice to LEMSA
rights otherwise to recover its damages. Any additional language as detailed in the
contract. If the County decides to terminate the contract with the awarded Selected
Proposer for any reason, it retains the right to invite the next highest -ranked Proposer to
enter into a contract or rebid the project, depending on what is deemed most beneficial.
10.4 EMERGENCY TAKEOVER
In the event that Selected Proposer is in material breach of the standards of performance
set forth in the Agreement, which LEMSA determines represents an immediate threat to
public health and safety, such Default shall constitute a Default of the Agreement.
In the event of a Default, LEMSA shall give Selected Proposer written notice, return
receipt requested, setting forth with reasonable specificity the nature of the Cardinal
Default. Selected Proposer shall have the right to cure such Cardinal Default within
seven (7) calendar days of receipt of such notice and the reason such Cardinal Default
endangers the public's health and safety. Within twenty-four (24) hours of receipt of such
notice, Selected Proposer shall deliver to LEMSA, in writing, a plan of action to cure such
Cardinal Default. If Selected Proposer fails to cure such Cardinal Default within the
period allowed for cure (with such failure to be determined in the sole and absolute
discretion of LEMSA) or Selected Proposer fails to timely deliver the cure plan to
LEMSA/County’s satisfaction, LEMSA may takeover Selected Proposer's operations.
Selected Proposer shall cooperate completely and immediately with LEMSA to ensure a
prompt and orderly transfer of all responsibilities to LEMSA.
Selected Proposer shall not be prohibited from disputing any such f inding of default
through litigation, provided, however, that such litigation shall not have the effect of
delaying, in any way, the immediate takeover of operations by LEMSA. These provisions
shall be specifically stipulated and agreed to by both parties as being reasonable and
necessary for the protection of public health and safety, and any legal dispute concerning
the finding that a default has occurred shall be initiated and shall take place only after the
emergency takeover has been completed.
Selected Proposer's cooperation with, and full support of, such emergency takeover shall
not be construed as acceptance by Selected Proposer of the findings and default and
shall not in any way jeopardize Selected Proposer's right of recovery should a court later
find that the declaration of default was made in error. However, failure on the part of
Selected Proposer to cooperate fully with LEMSA to affect a smooth and safe takeover of
operations, shall itself constitute a breach of the Agreement. For any default other than a
Default by Selected Proposer, the early termination provisions set forth in the Agreement
shall apply.
In the event LEMSA determines that a material breach, actual or threatened, has or will
occur, or that a labor dispute has prevented performance, and if the nature of the breach
is, in the opinion of the Health Director, such that public health and safety are
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endangered, and after Selected Proposer has been given notice and reasonable
opportunity to correct deficiency, the matter shall be presented to the County Board of
Supervisors. If the County Board of Supervisors concurs that a breach has occurred
and that health and safety would be endangered by allowing Selected Proposer to
continue its operations, Selected Proposer shall cooperate fully with LEMSA to affect an
immediate takeover by LEMSA of Selected Proposer's ambulances and crew stations.
Such takeover shall be affected within not more than 72 hours after the County Board of
Supervisors’ action.
In the event of an emergency takeover, Selected Proposer shall deliver to LEMSA
ambulances and associated equipment used in performance of Contract, including
supervisors' vehicles. Each ambulance shall be equipped, at a minimum, with the
equipment and supplies necessary for the operation of ALS ambulances in accordance
with LEMSA Policies and Procedures.
During LEMSA takeover of the ambulances and equipment, County and Selected
Proposer shall be considered Lessee and Lessor, respectively. Monthly rent payable to
Selected Proposer shall be equal to the aggregate monthly amount of Selected
Proposer's debt service on vehicles and equipment as documented by Selected
Proposer at LEMSA’s request and verified by County Auditor. County Auditor shall
disburse these payments directly to Selected Proposer's obligee. In the event an
ambulance is unencumbered, or a crew station is not being rented, County shall pay the
Selected Proposer the rentals specified in Agreement.
Nothing herein shall preclude LEMSA from seeking to recover from Selected Proposer
such rental and debt service payments as elements of damage from a breach. However,
Selected Proposer shall not be precluded from disputing the findings or the nature and
amount of LEMSA’s damages, if any, through litigation.
LEMSA agrees to return Selected Proposer's vehicles and equipment to Selected
Proposer in good working order, normal wear and tear excepted, at the end of takeover
period. For any of Selected Proposer's equipment not so returned, LEMSA shall pay
Selected Proposer fair market value of vehicle and equipment at time of takeover, less
normal wear and tear, or shall pay Selected Proposer reasonable costs of repair, or shall
repair and return vehicles and equipment. LEMSA may unilaterally terminate takeover
period at any time and return facilities and equipment to Selected Proposer. The
takeover period shall last, in LEMSA's judgment, no longer than is necessary to stabilize
the EMS System and to protect the public health and safety by whatever means LEMSA
chooses.
All of Selected Proposer's vehicles and related equipment necessary for provision of
services pursuant to this Contract are hereby leased to LEMSA/County during an
emergency takeover period. Selected Proposer shall maintain and provide to
LEMSA/County a listing of all vehicles used in the performance of this Contract, including
reserve vehicles, their license numbers, and name and address of lienholder, if any.
Changes in lienholder, as well as the transfer, sale, or purchase of vehicles used to
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provide ALS services hereunder shall be reported to LEMSA within thirty (30) days of
said change, sale, transfer, or purchase. Selected Proposer shall inform and provide a
copy of takeover provisions contained herein to lienholder(s) within five (5) days of
emergency takeover.
10.5 TRANSITION PLANNING
COMPETITIVE PROCUREMENT REQUIRED
Selected Proposer acknowledges that the LEMSA intends to conduct a competitive
procurement process for the provision of ambulance service within the County following
expiration of the Agreement. Selected Proposer acknowledges and agrees that County
may select a different ambulance service provider to provide exclusive ambulance
services within the area specified herein following said competitive procurement process.
FUTURE PROCUREMENT CYCLES
Selected Proposer acknowledges and agrees that supervisory personnel, EMTs,
paramedics, and dispatch personnel working in the EMS System have a reasonable
expectation of long-term employment in the system, even though Contractors may
change. Accordingly, Selected Proposer shall not penalize or bring personal hardship to
bear upon any of its employees who apply for work on a contingent basis with competing
Proposers and shall allow without penalty its employees to sign contingent employment
agreements with competing Proposers at employees' discretion. Selected Proposer may
prohibit its employees from assisting competing Proposers in preparing bid Proposals by
revealing Selected Proposer's trade secrets or other information about Selected
Proposer's business practices or field operations.
10.6 COUNTY’S REMEDIES
If conditions or circumstances constituting a default as set forth in this RFP exist,
LEMSA/County shall have all rights and remedies available at law and in equity under
the Agreement, specifically including the right to terminate the Agreement. The right to
pursue Selected Proposer for damages and the right of emergency takeover as set forth
in in this RFP. LEMSA/County’s remedies shall be in addition to any other remedy
available to LEMSA/County.
10.7 "LAME DUCK" PROVISIONS
Should the Agreement not be renewed, extended, or if notice of early termination is given
by LEMSA, Selected Proposer agrees to continue to provide all services required in and
under the Agreement until LEMSA, or a new entity, assumes service responsibilities.
Under these circumstances, Selected Proposer will, for a period of several months, serve
as a lame duck Selected Proposer. To ensure continued performance fully consistent
with the requirements herein through any such period, the following provisions shall
apply:
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Selected Proposer shall continue all operations and support services at the same
or greater level of effort and performance as were in effect prior to the award of
any subsequent Agreement to a competing organization, including but not limited
to compliance with provisions hereof related to qualifications of key personnel.
Selected Proposer shall make no changes in methods of operation that could
reasonably be considered to be aimed at cutting Selected Proposer service and
operating costs to maximize or effect any financial gain during the final stages of
the Agreement.
The LEMSA recognizes that if another organization should be selected to provide
service, Selected Proposer may reasonably begin to prepare for transition of
service to the new entity. LEMSA shall not unreason ably withhold its approval of
Selected Proposer's request to begin an orderly transition process, including
reasonable plans to relocate staff, scale down certain inventory items, etc., as
long as such transition activity does not impair Selected Proposer's performance
during this period.
Should the LEMSA select another organization as a service provider in the future,
Selected Proposer personnel shall have reasonable opportunities to discuss
issues related to employment with such organizations without adve rse
consequence.
10.8 GENERAL REQUIREMENTS, ALLOWANCES, RESTRICTIONS
ANNUAL PERFORMANCE EVALUATION
The LEMSA reserves the right to conduct an annual independent programmatic review to
evaluate the performance of the Selected Proposer.
An evaluation report will be provided to the County Board of Supervisors. The following
criteria, at a minimum, should be included in the performance evaluation:
Whether response time performance standards have been met at or are above
the minimum requirements in the Contract.
Whether clinical performance standards have been met at or are above the
minimum requirements in the Contract.
What, if any, innovative programs to improve system performance have been
established; and
That a stable workforce has been maintained and wh at documented efforts to
minimize employee turnover have been taken.
ASSIGNMENT
Selected Proposer shall not assign any portion of the Agreement for services to be
rendered without written consent first obtained from LEMSA and any assignment made
contrary to the provisions of this section may be deemed a Default of the Agreement
and, at the option of the LEMSA, shall not convey any rights to the assignee.
Irrespective of Selected Proposer assigning any portion of this agreement with or without
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LEMSA knowledge or consent, the Selected Proposer remains 100% obligated to every
deliverable in the contract for service.
Notwithstanding the above, LEMSA shall not unreasonably withhold its permission in
response to a request to transfer the Contract to an entity that may seek to acquire the
Selected Proposer so long as that entity meets the minimum service qua lifications
established herein, agrees to the terms of the Contract and is otherwise deemed
acceptable by LEMSA.
SUBCONTRACTING
Selected Proposer may not use any subcontractor to perform any of Selected Proposer’s
obligations under this Contract unless (a) Subcontractor has and maintains a local
emergency ambulance permit to operate in Contra Costa County Selected Proposer(b)
Selected Proposer has entered into a separate written agreement with the subcontractor
which requires the subcontractor to agree to and abide by all the terms and conditions of
this Contract. Selected Proposer Notwithstanding the foregoing, Selected Proposer shall
not be relieved of any of its duties or obligations under this Contract as a result of
entering into a written agreement with a permitted subcontractor.
PERMITS AND LICENSES
Selected Proposer shall be responsible for and shall hold any and all required federal,
state, or local permits or licenses required to perform its obligations or its subcontractor’s
obligations under the Agreement. In addition, Selected Proposer shall make all
necessary payments for licenses and permits for the services and for issuance of s tate
permits for all ambulance vehicles used. It shall be entirely the responsibility of Selected
Proposer to schedule and coordinate all such applications and application renewals as
necessary to ensure that Selected Proposer and/or subcontractor is in complete
compliance with federal, state, and local requirements for permits and licenses as
necessary to provide the services. Selected Proposer shall be responsible for ensuring
that its employees’ state and local certifications as necessary to provide the services, if
applicable, are valid and current at all times.
COMPLIANCE WITH LAWS AND REGULATIONS
All services furnished by Selected Proposer under the Agreement shall be rendered in
full compliance with all applicable federal, state, and local laws, or dinances, rules, and
regulations. It shall be Selected Proposer’s sole responsibility to determine which, and
be fully familiar with, all laws, rules, and regulations that apply to the services under the
Agreement, and to maintain compliance with those applicable standards at all times.
PRIVATE WORK
Selected Proposer shall not be prevented from conducting private work that does not
interfere with the requirements of Contract.
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RETENTION OF RECORDS
Selected Proposer shall retain all documents pertaining to Contract for five (5) years
from the end of the fiscal year following the date of service; for any further period that is
required by law; and until all Federal/State audits are complete and exceptions resolved
for this Contract's funding period. Upon request, and except as otherwise restricted by
law, Selected Proposer shall make these records available to authorized representatives
of LEMSA/County, the State of California, and the United States Government.
PRODUCT ENDORSEMENT/ADVERTISING
Selected Proposer shall not use the name of LEMSA/County of Contra Costa for the
endorsement of any commercial products or services without the expressed written
permission of LEMSA/County.
OBSERVATION AND INSPECTIONS
LEMSA representatives will, at any time, and without notification, directly observe
Selected Proposer's operations of the dispatch center, maintenance facility, or any
ambulance post location. A LEMSA representative may ride as "third person" on any of
Selected Proposer's ambulance units at any time, provided, that in exercising this right to
inspection and observation, LEMSA representatives shall conduct themselves in a
professional and courteous manner, shall not interfere with Selected Proposer
employee's duties, and shall at all times be respectful of Selected Proposer's
employer/employee relationships.
At any time during normal business hours, and as often as may be reasonably deemed
necessary by LEMSA, LEMSA representatives may observe Selected Proposer's office
operations, and Selected Proposer shall make available to LEMSA for its examination
any and all business records, including incident reports, patient records, financial records
of Selected Proposer pertaining to the Agreement. LEMSA may audit, copy, make
transcripts, or otherwise reproduce such records including but not limited to contracts,
payroll, inventory, personnel and other records, daily logs, employment agreements, and
other documentation for LEMSA to fulfill its oversight role.
OMNIBUS PROVISION
Selected Proposer understands and agrees that for four (4) years following the
conclusion of the Agreement it may be required to make available upon written request
to the Secretary of the U.S. Department of Health and Human Services, or an y other fully
authorized representatives, the specifications and subsequent agreements, and any
such books, documents, and records that are necessary to certify the nature and extent
of the reasonable costs of services.
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SMALL BUSINESS UTILIZATION
Selected Proposer shall consider and make good faith efforts to engage small
businesses, women, and minority owned firms in its purchasing and subcontracting
arrangements.
RELATIONSHIP OF THE PARTIES
Nothing in the Agreement shall be construed to create a relat ionship of employer and
employee or principal and agent, partnership, joint venture, or any other relationship
other than that of independent parties contracting with each other solely for the purpose
of carrying out the provisions of the Agreement. Nothing in the Agreement shall create
any right or remedies in any third party, it being solely for the benefit of LEMSA and
Selected Proposer.
RIGHTS AND REMEDIES NOT WAIVED
Selected Proposer shall covenant that the provision of services to be performed by
Selected Proposer under the Agreement shall be completed without further
compensation than that provided for herein. The acceptance of work under the
Agreement and the payment therefore shall not be held to prevent maintenance of an
action for failure to perform work in accordance with the Agreement. In no event shall
payment of consideration by LEMSA constitute or be construed to be a waiver by LEMSA
of any default or covenant or any Default by Selected Proposer. LEMSA's payment shall
in no way impair or prejudice any right or remedy available to LEMSA with respect to
such default.
CHOICE OF LAW AND PERSONAL JURISDICTION
The parties’ agreement will be governed by the law of the State of California. Selected
Proposer shall consent to the exclusive jurisdiction of the courts of the County of Contra
Costa, California.
END-TERM PROVISIONS
Selected Proposer shall have ninety (90) days after termination of the Agreement in
which to supply the required audited financial statements and other such documentation
necessary to facilitate the close out of the Agreement at the end of the term.
NOTICE OF LITIGATION
Selected Proposer shall notify LEMSA within twenty-four (24) hours of any litigation or
significant potential for litigation related to the Agreement or Selected Proposer’s
performance thereunder of which Selected Proposer is aware.
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GENERAL CONTRACT PROVISIONS
In addition to the specific contract provisions listed this document; the written Contract
will include general conditions required by LEMSA in contracts such as this.
SECTION 11 – SYSTEM INTEGRATION AND SYSTEM
INNOVATION
11.1 SYSTEM INTEGRATION
Proposers shall propose how they will maximize the capabilities of system partners to
enhance overall system integration to optimize resources, improve population health,
and provide additional accountability for first responder fire and EMS agencies and the
County.
11.2 SYSTEM INNOVATION
Proposers shall propose how they will innovate within the system to improve patient
outcomes, access to care, overall EMS System performance and other system aspects.
HEALTH INFORMATION EXCHANGE
Health Information Exchange (HIE) refers to the secure, effective, and efficient sharing of
electronic health data among healthcare institutions. An HIE organization is an entity
that oversees or facilitates the exchange of health information among a diverse group of
healthcare stakeholders within and across regions, according to nationally recognized
standards. Some also allow authorized care team members to use the HIE organization
like a search engine to find and use relevant information quickly and efficiently. When
widely used, the exchange of health information can transform the way care is delivered
by improving physician workflow, fostering increased communication among providers
and patients, improving the ability to access and analyze data, and reducing healthcare
costs.
There are various ways to exchange health information: directed exchange (push) and
query-based exchange (pull), are the most common types of exchange of health
information in use today.
Directed Exchange (push) – capability to send and receive a message securely
from one provider to another. This is also referred to as “point-to-point” or
“transactional” exchange.
Query-Based Exchange (pull) – enables users to find and/or request information
about one or more individuals from various other care team members, allowing for
the creation of a longitudinal, comprehensive view of an individual’s history.
Consumer Mediated Exchange – ability for individuals to aggregate and control
the use of their health information among their care team.
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The ability to use an HIE as a resource for an individual’s records is especially important
to field paramedics and staff in an emergency room setting as individuals or their families
may be unable to assist with basic, reliable health information. Not only is it critical that
first responders have access to relevant health data, such as medical problems,
medications, allergies and end-of-life decisions, but the information they collect must be
efficiently communicated to downstream providers. This process is facilitated by “real-
time” patient bedside search and entry by EMS care teams and transmittal to the
emergency department.
In the future, the EMS system could benefit from more robust access to health
information through the use of a Health Information Exchange (HIE) to improve clinical
care and access to related services. The Selected Proposer shall participate in HIE
initiatives if the County implements a HIE.
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SECTION 12 – APPENDICES
12.1 DEFINITIONS
Advanced Life Support - special services designed to provide definitive prehospital
emergency medical care as defined in Health and Safety Code § 1797.52, including, but
not limited to, cardiopulmonary resuscitation, cardiac monitoring, cardiac defibrillation,
advanced airway management, intravenous therapy, administration of specified drugs
and other medicinal preparations, and other specified techniques and procedures
administered by authorized personnel under the direct supervision of a base hospital.
Against Medical Advice (AMA) - patients refusing treatment and/or transport against
the advice of the prehospital provider.
ALS Unit - an ambulance especially equipped to provide advanced life support services,
staffed by at least one Emergency Medical Technician and one Paramedic.
Ambulance - any vehicle specially constructed, modified or equipped and used for
transporting sick, injured, or otherwise incapacitated person and capable of supporting
BLS or a higher level of care.
Ambulance Service - furnishing, operating, conducting, maintaining, advertising, or
otherwise engaging in or professing to be engaged in the transportation of patients by
ambulance.
Ambulance Patient Offload Delay - the delay beyond the County’s approved
benchmark that can occur when transferring care of a patient from emergency service
personnel to hospital emergency department staff.
Arrival at Incident Location - the second an ambulance notifies the designated
Communications Center that it has stopped at the scene of an incident (the entrance to a
specific building, not merely the entrance to the complex in general; or an actual accident
scene, not merely an approach location within sight of the accident scene). In cases of
response to hazmat incidents or incidents involving a law enforcement agen cy wherein
there is reason to believe the scene to be unsafe, the response time clock shall be
stopped the second upon arrival at a designated staging area proximate to the scene.
Automated External Defibrillation (AED) - a portable electronic device that
automatically analyzes the heart rhythm and detects a cardiac arrythmia that may
respond to electrical therapy and can deliver a shock to convert specific heart rhythms
back to normal; used by the public, public safety, and BLS providers.
Automatic Vehicle Location System - the system of device that makes use of the
Global Positioning System (GPS) to enable remotely tracking and displaying the location
of fleet vehicles by using the internet. These systems combine GPS technology, cellular
communications, street-level mapping, and an intuitive user interface.
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Base Hospital - one of a limited number of hospitals which, upon designation by the
local LEMSA and upon the completion of a written contractual agreement with the local
LEMSA, is responsible for directing the advanced life support system or limited
advanced life support system and prehospital care system assigned to it by the local
LEMSA.
Basic Life Support - services designed to provide definitive prehospital emergency
medical care as defined in Health and Safety Code § 1797.60., including emergency first
aid and cardiopulmonary resuscitation procedures which, as a minimum, include
recognizing respiratory and cardiac arrest and starting the proper application of
cardiopulmonary resuscitation to maintain life without invasive techniques until the
patient may be transported or until advanced life support is available.
Business Day - Monday through Friday except for holidays as observed per the
California Government Code 6700 et seq.
California Division of Occupational Safety and Health Division (CAL/OSHA) - the
State Division that protects and improves the health and safety of working men and
women in California.
Center for Medicare and Medicaid Services (CMS) - the federal agency responsible
for regulating payments and other high-level policies for ambulance services.
Certificate - a specific document issued to an individual denoting competence in the
named area of prehospital service as defined in Health and Safety Code § 1797.61.
Computer Aided Dispatch (CAD) - the hardware and software systems used by the
County and the Selected Proposer to facilitate call taking, system status management,
unit selection, ambulance coordination, resource dispatch and deployment, event time
stamping, creation and real-time maintenance of incident database, and providing
management information.
Consumer Price Index (CPI) - a measure of the average change over time in the price
paid by urban consumers for a market base of consumer goods and services.
Contract - the agreement between the County and Selected Proposer awarded under
the terms of this Request for Proposal.
Contractor - Proposer that is selected to provide the services and execute the
Ambulance Services Agreement under the terms of this Request for Proposal.
County - County of Contra Costa, California.
Cultural Competence - (in healthcare) the ability for healthcare professionals to
demonstrate cultural competence toward patients with diverse values, beliefs, and
feelings.
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Dedicated Special Events Coverage – the posting of assigned resources at a
scheduled special event.
Density - call density or a concentration of calls for a particular area of the EOAs not to
be confused with population density.
Deployment - the procedures by which ambulances are distributed throughout the
service area. Deployment includes the locations at which the ambulances are placed (or
posted) and the number of ambulances placed in service for the particular time period.
Designated facility - a hospital which has been designated by a local LEMSA to perform
specified EMS systems function pursuant to guidelines established by the authority as
defined in Health and Safety Code § 1797.67.
Emergency Medical Services Plan - a plan for the delivery of emergency medical
services consistent with state guidelines addressing the components listed in Section
1797.103.
EMS Prevention Program - that program operated by the County to help improve
access and reduce emergency response demand among at -risk population groups within
the County.
EMS Area - the geographical area within the jurisdiction of the designated local LEMSA.
EMS System - specially organized arrangement which provides for the personnel,
facilities, and equipment for the effective and coordinated delivery in an EMS area of
medical care services under emergency conditions, as defined in Health and Safety
Code § 1797.78.
Emergency Medical Dispatcher (EMD) - a person in the employ of or acting under the
control of a private or public agency who receives calls requesting EMS and administers
emergency medical dispatch protocols approved by the System Medical Director.
Emergency Medical Technician (EMT) - an individual trained in all facets of basic life
support according to standards prescribed by the California Code of Regulations and
who has a valid certificate issued pursuant to that code.
Exclusive Operating Area (EOA) - an EMS area or subarea defined by the emergency
medical services plan for which a local LEMSA, upon the recommendation of a county,
restricts operations to one or more ambulance services or providers of limited advanced
life support or advanced life support.
First Responder - any employee of a state or local public agency who provides
emergency response services, including any peace officer, firefighter, paramedic,
emergency medical technician, public safety dispatcher, or public safety
telecommunicator.
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First Responder Agency - an agency or department with equipment and staff (e.g., fire
department, police or non-transporting ambulance unit) with personnel capable of
providing appropriate first responder prehospital care.
FirstWatch - that commercially available suite of software used to independently monitor
and report response times and other clinical factors.
Fractile Response - a method of measuring ambulance response times in which all
applicable response times are stacked in ascending length. Then, the total number of
calls generating response within eight minutes (for example) is calculated as a
percentage of the total number of calls. A 90th percentile, or 90 percent, standard is most
commonly used. When a 90th percentile response time standard is employed, 90
percent of the applicable calls are arrived at in less than eight minutes, while only 10
percent take longer than eight minutes.
Geographical Information Systems (GIS) - a framework for gathering, managing and
analyzing data.
Global Positioning System (GPS) - a system that utilizes satellite data to determine
location.
Health Equity - the absence of unfair and avoidable or remediable differences in health
among population groups defined socially, economically, demographically or
geographically.
Health Insurance Portability and Accountability Act (HIPAA) - the law that provides
data privacy and security provisions for safeguarding medical information.
High-Performance EMS System - the simultaneous achievement of clinical excellence,
response time reliability, and economic efficiency with functional external oversight, full
activity-based cost recognition, and performance sustainability.
Incident Command System (ICS) - a standardized approach to the command, control,
and coordination of emergency response providing a common hierarchy within which
responders from multiple agencies can be effective.
Interfacility Transportation - for purposes of SCT payment, an interfacility transport is
one in which the origin and destination are one of the following: a hospital or skilled
nursing facility that participates in the Medicare program or a hospital -based facility that
meets Medicare’s requirements for provider-based status.
Joint Ventures - two or more corporations or entities that form a temporary union for the
purpose of the RFP.
License - a specific document issued to an individual denoting competence in the
named area of prehospital service as defined in Health and Safety Code § 1797.61.
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Penalties - those funds due from Selected Proposer deemed taken and treated as
reasonable estimate of the damages to the County. The remedies in the event of the
Selected Proposer’s breach or any noncompliance, are not limited to this RFP or the final
Agreement penalty provisions.
Medical Director - the physician designated by the County as the Medical Director for its
EMS System including, but not limited to, communications personnel, first responders,
EMTs and paramedics, regardless of the entity that employs them.
Medical Priority Dispatch System (MPDS)® protocols - the protocols approved by the
Medical Director which govern the process of conducting telephone inquiry of persons
requesting ambulance service (9-1-1 and 7-digit access), whereby:
The presumptive priority classification is established.
The need for first response is determined.
The need for delivery of pre-arrival instructions to persons at the scene is
determined.
Appropriate pre-arrival instructions are provided.
Appropriate referrals to alternate resources, if indicated, are given.
Mutual Aid/Mutual Assistance - responses into the Contra Costa County EOAs from a
ground transport provider outside the EOAs for the purpose of assisting the Selected
Proposer with emergency and/or non-emergency requests for service; or responses by
the Selected Proposer to service areas outside the County EOAs for the purpose of
assisting the ground transport provider in an adjacent service area.
Mutual aid transport received - an emergency transport rendered by a neighboring
mutual aid provider at Selected Proposer’s official request pursuant to an approved
mutual aid agreement, and which originates within the primary service area, or an area
covered by the EOAs.
National Incident Management System (NIMS) - a systematic, proactive approach to
guide departments and agencies at all levels of government, nongovernmental
organizations, and the private sector to work together seamlessly.
Occupational Safety and Health Division (OSHA) - the Federal Division that protects
and improves the health and safety of working men and women.
Paramedic - an individual whose scope of practice to provide advanced life support is
according to standards prescribed by the California Code of Regulations and who has a
valid certificate issued pursuant to that code.
Patient Care Report (PCR) - the written or electronically recorded patient record, in a
form approved by the Jurisdiction and the Medical Director, providing for documentation
of all required medical, legal, billing, and other information related to a single Patie nt
Transport.
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Patient Contact - direct physical contact with, or on-site observation of, that person or
persons for whom an ambulance was requested, and in regard to whom the crew
completed a PCR, regardless of whether such patient contact did or did not result in
Patient Transport.
Post - a designated location for ambulance placement within the System Status Plan
(SSP). Depending upon its frequency and type of use, a “post” may be a facility with
sleeping quarters or day rooms for crews, or simply a street -corner or parking lot location
to which units are sometimes deployed.
Proposal Deadline - the closing date associated with this Request for Proposal.
Proposer - any entity seeking to receive a Contract under the terms of the County’s
Request for Proposal.
Public Safety Answering Point (PSAP) - that center operated by a local government
entity on behalf of the County to receive requests for EMS services.
Public Education - the use of resources at the location of a public education event,
such as a CPR program, health fair, school demonstration, civic or neighborhood
meeting, or gathering.
Personal Protective Equipment (PPE) - the equipment worn to minimize exposure to
hazards that cause serious workplace injuries and illnesses.
Quality Improvement (QI) - an approach to quality management that builds upon
traditional quality assurance methods by emphasizing the organization and systems.
Quick Response Vehicle (QRV) - a vehicle such as a Sport Utility Vehicle (SUV), Pick-
up Truck, or similar vehicle designed, operated, and equipped to provide EMS first
response service, not including transportation for ill and injured persons.
Record Management System (RMS) - the system for management of records
throughout the records-life cycle. The activities in this management include the
systematic and efficient control of the creation, maintenance, and destruction of the
records along with the business transactions associated with them.
Service Area - the awarded exclusive operating areas.
Scene Control - the broader public safety obligations of management of any EMS scene
when a fire or police agency is on scene shall be vested with the appropriate
governmental unit and not Selected Proposer. Patient care command shall be vested
with the highest level medically trained staff member of the governmental unit until care
is transferred to Selected Proposer personnel.
Special Event Coverage - the posting of an ambulance and crew, crew-only, paramedic,
or EMT at a scheduled special event or public education event.
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Standby Service - services whereby EMS providers locate themselves at a function or
event and remain dedicated to that event for its duration, to provide medical care if
needed.
System Standard of Care - the compilation of the MPDS protocols, pre-arrival
instruction protocols, medical protocols, response time requirements, protocols for
selecting destination hospital, standards for certification of prehospital care personnel
(i.e., system status controllers/EMS dispatchers, First Responders, ambulance
personnel, and medical control physicians), including requirements for on-board medical
equipment and supplies, all as approved by Medical Director, and all applicable federal,
state and local laws, rules, ordinances and regulations. The System Standard of Care
simultaneously serves as both a contractual norm and, where applicable, a regulatory
standard. The System Standard of Care shall also include the Proposer’s response to
this RFP to the extent that it is consistent with this RFP.
System Status Plan (SSP) - a planned protocol or algorithm governing the deployment
and event-driven redeployment of system resources, both geographically and by time of
day/day of week.
Transport (or Patient Transport) - the one-way transport by ambulance of a single
patient. For purposes of the Franchise, a round-trip transport of a patient to and from a
single location shall be considered two Patient Transports and two separate PCRs will be
generated. Furthermore, two patients transported in the same ambulance should be
considered one transport.
Unit Hour - one hour of service by fully equipped and staffed ambulance assigned to a
call or available for an assignment.
Unit Hour Utilization (UHU) - Unit Hour Utilization (UHU) measures the utilization of the
resources deployed within the system. It is measured as the total Time on Task (ToT)
from the time that the units are dispatched to all incidents until they return to available
status.
Unusual System Overload - at least double the average demand for the day of the
week and hour of day for each compliance zone. The average demand for each day and
hour is to be calculated on a cumulative basis from the initiation of the franchise during
the first two (2) years and on an annual basis using the prior two (2) calendar year ’s
actual run volume for that day and hour, thereafter. LEMSA shall only grant Unusual
System Overload-based exceptions if the Contractor took reasonable steps to mitigate
the asserted grounds for exception. For example, if the Unusual System Overload was
caused by weather, which was known days in advance, the Contractor must have
increased staffing or taken other reasonable steps to qualify for an Unusual System
Overload exemption.
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Utilization - a measure that compares the available resources (unit -hours) with actual
time that those unit-hours are being consumed by productive activity. The measure is
calculated to determine the percentage of unit-hours consumed in productivity with the
total available unit-hours.
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12.2 MAPS OF THE COUNTY
AMBULANCE RESPONSE ZONES
Residents of Contra Costa County are served by three EMS System ambulance
providers:
Moraga-Orinda Fire District (MOFD) provides exclusive EMS ambulance services
to residents in the Moraga-Orinda Ambulance Response Zone.
San Ramon Valley Fire Protection District (SRVFPD) provides exclusive EMS
ambulance services to residents living in the San Ramon Ambulance Response
Zone.
Contra Costa County Fire Protection District (CCCFPD) with their ambulance
subcontractor American Medical Response (AMR) provides exclusive emergency
ambulance services as the “Alliance” to the remaining portions of the county
(Ambulance Response Zones A, B,C and D).
Prior to January 1, 2016 American Medical Response was the sole EMS ambulance
contractor for ambulance response zones A through D. Emergency ambulance service
areas are illustrated below.
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INCIDENT DENSITY MAP
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12.3 CURRENT AMBULANCE SERVICE RATES
MEDICARE 20 21 2 02 2 20 23 AVERAGE
MILEAGE $ 7.6 3 $ 8.0 2 $8.71 $8 .12
ALS 1 NON EMERG ENCY $ 2 97.4 5 $ 31 2.6 2 $342 .99 $3 1 7.6 9
ALS 1 EMER GENCY $ 4 70.9 7 $ 49 4.9 8 $543 .07 $5 0 3.0 1
BLS NON EMER GENCY $ 2 47.8 8 $ 26 0.5 1 $285 .83 $2 6 4.7 4
BLS EMERGENCY $ 3 96.6 0 $ 41 6.8 2 $457 .33 $4 2 3.5 8
ALS 2 $ 6 81.6 6 $ 71 6.4 1 $786 .03 $7 2 8.0 3
SCT $ 8 05.6 0 $ 84 6.6 7 $928 .94 $8 6 0.4 0
MEDICAID 20 21 2 02 2 20 23 AVERAGE
MILEAGE $ 3.5 5 $ 3.5 5 $ 3 .55 $3 .55
ALS 1 NON EMERG ENCY $ 1 07.1 6 $ 10 7.1 6 $ 1 07 .16 $1 0 7.1 6
ALS 1 EMER GENCY $ 1 18.2 0 $ 11 8.2 0 $ 1 18 .20 $1 1 8.2 0
BLS NON EMER GENCY $ 1 07.1 6 $ 10 7.1 6 $ 1 07 .16 $1 0 7.1 6
BLS EMERGENCY $ 1 18.2 0 $ 11 8.2 0 $ 1 18 .20 $1 1 8.2 0
ALS 2 $ 1 18.2 0 $ 11 8.2 0 $ 1 18 .20 $1 1 8.2 0
SCT $ 1 18.2 0 $ 11 8.2 0 $ 1 18 .20 $1 1 8.2 0
M EDICARE AND M EDICAID FEE SCHEDULE
CHA RGEMASTER
SERVICE CODE 2019 2020 2021 2022
MILEAGE A0425 $5 3 .5 6 $58.00 $62.00 $6 5 .2 9
ALSE A0427 $2 ,2 45.40 $2,428.00 $2,565.00 $2,700.95
ALSNE A0426 $2 ,2 45.40 $2,428.00 $2,565.00 $2,700.95
BLSE A0429 $2 ,2 45.40 $2,428.00 $2,565.00 $2,700.95
BLSNE A0428 $2 ,2 45.40 $2,428.00 $2,565.00 $2,700.95
ALS2 A0433 $2 ,2 45.40 $2,428.00 $2,565.00 $2,700.95
SCT A0434 $0 .0 0 $0.00 $0.00 $0 .0 0
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12.4 MANDATORY FIRST PAGE FORM
PROPOSAL TO PROVIDE AMBULANCE SERVICES TO
COUNTY OF CONTRA COSTA, CALIFORNIA
**THIS FORM MUST APPEAR AS THE FIRST PAGE OF THE PROPOSAL**
This is a Proposal to receive a Contract from the County to provide ambulance service to
persons requesting said services through the County or a County designated emergency
dispatch center.
NAME OF
PROPOSER: _______________________________________________
D/b/a ______________________________________________________
LEGAL
ADDRESS: _________________________________________________
PHONE: ___________________
EMAIL: ______________ FAX: _______________
CONTACT PERSON: __________________________________________
PHONE: _______________________ EMAIL: _____________________
ADDRESS FOR MAILINGS (if different):
___________________________________________________________
_____________________________________________________
OFFICIAL USE ONLY: DO NOT FILL IN THIS SECTION
PROPOSAL # __________________
_______________________DATE RECEIVED __________TIME
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12.5 FINANCIAL REVIEW FORM
Standard
Next most
Recent FY
Most Recent FY
> 1.30
Current ratio:
current assets
divided by current
liabilities
> $2,500,000
Working capital:
current assets less
current liabilities
< 1.66
Debt to equity:
long-term debt
divided by total
shareholders
(owners) equity
> $5,000,000
Total
shareholders
(owners) equity
In addition to completing the form above as part of its qualification ’s requirements,
Proposer shall include documentation such as audited financial statements supporting
the information provided. Proposer must disclose any m aterial change in financial
status occurring subsequent to the most recent reporting period above.
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12.6 PRICING FORM
(SUBMIT AS SEPARATELY TITLED FILE)
BLS Transport Rate $
ALS Transport Rate $
Loaded Ambulance Mile Rate $
Treat and no transport charge $
Oxygen Rate $
BLS Standby Rate $
ALS Standby Rate $
BLS Standby (Non-Transport) Rate $
ALS Standby (Non-Transport) Rate $
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12.7 CLINICAL SCORECARD
STATE AND NATIONAL BENCHMARKING PARTICIPATION
The Selected Proposer shall submit all data and participate in the California EMS
System Core Quality Core Measures Project, CARES, NEMSQA, and The American
Heart Association Mission: Lifeline.
CLINICAL PERFORMANCE MEASURES
The following clinical performance measures were developed in conjunction with national
model clinical guidelines, the California EMS System Core Quality Core Measures
Project, CARES, NEMSQA, the American Heart Association Mission: Lifeline and with
input from the Medical Director. The Proposer shall describe their clinical performance
standards based on the standards listed below. The Proposal may contain additional
clinical performance standards. LEMSA and the Selected Proposer will confer to develop
clinical performance measures, definitions, specifications, and standards, which will
become part of any future agreement. It is understood, due to the nature of clinical
performance standards, a phase-in discovery period will be necessary, and standards
may not be defined at the beginning of the agreement.
MEASUREMENT OF CLINICAL PERFORMANCE STANDARDS
Clinical Performance Standards are a performance -based approach rather than an
undefined level of effort. The Selected Proposer shall commit to employing whatever
level of effort is necessary to achieve the agreed -upon clinical performance standards.
The Selected Proposer shall ensure EMS personnel are trained to these standards in a
manner consistent with this goal.
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115
12.8 SAMPLE PROPOSAL EVALUATION CRITERIA EXPLAINED
CREDENTIALS AND QUALIFICATIONS
Demonstrated ability to meet response time standards
Has the Proposer documented its ability to meet response times such as those
outlined herein?
Demonstrated ability to provide a high level of clinical performan ce
Has the Proposer provided adequate historical documentation of its ability to
provide clinical performance similar to the requirements under this RFP?
Financial strength and stability
Has the Proposer demonstrated its financial status and capability to assure
adequate financing to operate the County EMS System?
Demonstrated expertise in EMS System management
Has the Proposer provided sufficient information to determine the organization ’s
background and history, including in providing EMS?
Has the Proposing organization provided services comparable to those outlined in
this RFP?
Submission of required organizational documents that demonstrate organizational
structure and ownership
Has the Proposer described its legal structure including type of organization?
COMPLIANCE WITH THE PROCUREMENT PROCESS
The Letter of Intent was submitted no later than the date listed in the Procurement
Timeline.
Exhibits were submitted as separately titled files.
Did the proposer submit all financial documents and proposed ambulance rates in
a separately titled file?
Were the financial elements and proposed ambulance rates electronically
submitted in a separate file/attachment from the main elements of the RFP an d
clearly marked as such?
PROPOSAL FORMAT AND INSTRUCTIONS FOLLOWED
The narrative portion of the Proposal shall be limited to one hundred (100) pages,
excluding title pages and dividers.
Easily readable font, no smaller than 11 point
Line spacing no smaller than 1 ½ lines
Standard 8 ½” by 11” paper
Pages must be numbered sequentially
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Did the proposer submit a separately titled file on the Purchasing Services
Division website, ensuring each exhibit is labeled appropriately?
Did the proposer submit all financial documents and proposed ambulance rates in
a separately titled file on the Purchasing Services Division website? Financial
elements and proposed ambulance rates are not mentioned in any other section
of the Proposal.
MINIMUM QUALIFICATIONS
Proposer Eligibility
Has the Proposer provided sufficient information to determine it is an eligible
entity?
Proposer Eligibility
Does the Proposer demonstrate its compliance with the Procurement Process?
Minimum Qualifications
Does the Proposer meet the minimum qualifications?
SERVICE PLAN
Proposer’s Functional Responsibilities
Has the Proposer demonstrated its ability to meet the functional responsibilities?
Services Description
Has the Proposer demonstrated its ability to provide the services described?
CLINICAL STANDARDS
Progressive Clinical QI & Continuing Education Required
Did the proposer outline their strategy for adopting the Contra Costa EMS Quality
Improvement Program Plan? This involves crafting a robust quality management
system in line with the California Health and Safety Code § 1797 et seq. and the
California Code of Regulations, Title 22, Division 9, Chapter 12.
Clinical Performance Measurement and Incentive
Has the Proposer fully outlined what data/metrics it will collect and how it will be
used to improve the clinical practice within the EMS System?
Continuing Education Program Requirements
Has the Proposer described how they will provide training programs designed to
meet the qualifications described?
Dedicated Personnel Required & Support for LEMSA Medical Director and Clinical
Research
Has the Proposer documented their commitment to have the key personnel of
their Contra Costa County operating unit actively participate in the leadership and
oversight of the quality management system
Medical Review/Audits
117
Has the Proposer described how it will achieve a positive Quality Management
Process and how engagement in those processes will be accomplished?
Clinical Innovations
Since the RFP contemplates a clinically sophisticated system, has the Proposer
sufficiently described suggested clinical benchmarks and what commitments it
makes to collaborate and otherwise support the system’s ongoing research
initiatives?
Does the Proposer describe any additional research initiative commitments?
OPERATIONAL STANDARDS
Deployment Planning
Has the provider outlined its deployment plans, mechanisms of reducing
exceptions and how it intends to notify LEMSA of plan changes?
Ambulance Staffing Requirements
Vehicles and Equipment
Communications Systems Management
Technology and Data Management
Non-Clinical Training
Critical Incident Stress Management
Disaster Response and Preparedness
AMBULANCE RESPONSE TIME PERFORMANCE STANDARDS &
PENALTIES
Interfacility Transport Plan
ADMINISTRATIVE STANDARDS
Community Health Status Improvement
Patient Experience Evaluation
Customer Service Hotline and Complaint Process
Employee Safety and Wellness
Internal Risk Management
Communicable Diseases, Safety, and Prevention
Key Personnel
Reports Required
Participation in System Development and Future Enhancements
REGULATORY COMPLIANCE AND FINANCIAL PROVISION
Insurance Provisions
Performance Security
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DEFAULT, TERMINATION, AND OTHER GENERAL PROVISIONS
Emergency Takeover Plan
FINANCIAL DOCUMENTATION & PROPOSED PRICING
Each Proposer is required to complete each line on the Price Sheet for proposed patient
charges included in Appendix 12.6 Pricing Form. This sheet should be completed and
submitted separately from the technical Proposal. The supporting material shall include
audited financial statements for the most recent fiscal year and other pertinent
documents.
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12.9 INTENT TO RESPOND
TO BE COMPLETED AND SUBMITTED BY 3:00 PM, (insert date here)
Instructions for Submittal
Date:
Fill in the date at the top of the form using the format MM/DD/YYYY.
Organization Information:
Name of Organization: Enter the full legal name of your organization.
Address: Provide the physical address of the organization’s main office.
City, State, Zip Code: Complete this section with the corresponding city, state,
and ZIP code.
Acknowledgment of Intent:
Read the provided statement to confirm your organization’s intent to respond to
the RFP. Ensure your organization understands the requirements and timelines
outlined in the RFP documentation.
Primary Contact Information:
Primary Contact Person: Enter the name of the individual responsible for
communication regarding the RFP.
Title: Specify the contact person’s title within the organization.
Phone: Provide the phone number where the contact person can be reached.
Email: Include the contact person’s email address.
Final Review:
Review the entire LOI to ensure accuracy and completion.
Submission:
Submit the completed LOI by the deadline specified in the RFP and email it to email
address here.
Non-Binding Statement:
Note that this LOI is not a binding agreement and is solely to express intent to
respond to the RFP.
INTENT TO RESPOND
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Date:
Name of Organization:
Address:
City, State, Zip Code:
Subject: Letter of Intent to Respond to the RFP for the Exclusive Ambulance
Services Provider for the Contra Costa County, California Exclusive Operating Area
Dear Contra Costa County, California Purchasing Department –
This letter confirms our intent to respond to the Request for Proposal (RFP) for the
provision of emergency medical services in the Contra Costa County, California
Exclusive Operating Area (EOA). We acknowledge our understanding of the RFP
requirements and timelines as outlined in the provided documentation. Our
organization is fully prepared to submit a proposal that addresses the scope of
services, performance expectations, and compliance with applicable local, state, and
federal regulations, including the Health and Safety Code and California EMS
Authority guidelines. Our team looks forward to participating in this competitive
process. Thank you for this opportunity. Please feel free to contact me directly with
any questions or additional instructions.
Please find the requested information below:
Primary Contact Person:
Title:
Phone:
Email:
12.10 INDEMNIFICATION AND INSURANCE REQUIREMENTS
EXHIBIT C
121
Indemnification and Insurance Requirements
(For LEMSA Contract)
NOTIFICATION OF ACCIDENTS AND SURVIVAL OF INDEMNIFICATION
PROVISIONS
CONTRACTOR shall notify COUNTY immediately in the event of any accident or
injury arising out of or in connection with this Agreement. The indemnification provisions in
this Agreement shall survive any expiration or termination of this Agreement.
INSURANCE
CONTRACTOR shall procure and maintain for the duration of this Agreement
insurance against claims for injuries to persons or damages to property which may arise
from or in connection with the performance of the work hereunder and the results of that
work by the CONTRACTOR, its agents, representatives, employees or subcontractors.
A. Minimum Scope of Insurance
Coverage shall be at least as broad as:
1. Commercial General Liability (CGL): Insurance Services Office (ISO) Form
CG 00 01 covering CGL on an “occurrence” basis, including products-
completed operations, personal & advertising injury, with limits no less than
$10,000,000 per occurrence and $10,000,000 in the aggregate.
2. Automobile Liability: ISO Form Number CA 00 01 covering any auto (Code
1), or if CONTRACTOR has no owned autos, hired, (Code 8) and non-owned
autos (Code 9), with limit no less than $10,000,000 per accident for bodily injury
and property damage.
3. Workers’ Compensation: as required by the State of California, with Statutory
Limits, and Employer’s Liability Insurance with limit of no less than $1,000,000
per accident for bodily injury or disease.
4. Professional Liability: (Errors and Omissions) Insurance appropriate to the
Consultant’s profession, with limit no less than $10,000,000 per occurrence or
claim, $10,000,000 aggregate.
5. Cyber Liability Insurance: Cyber Liability Insurance, with limits not less than
$5,000,000 per occurrence or claim, $5,000,000 aggregate. Coverage shall be
sufficiently broad to respond to the duties and obligations as is undertaken by
Vendor in this agreement and shall include, but not be limited to, claims
involving infringement of intellectual property, including but not limited to
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infringement of copyright, trademark, trade dress, invasion of privacy
violations, information theft, damage to or destruction of electronic information,
release of private information, alteration of electronic information, extortion and
network security. The policy shall provide coverage for breach response costs
as well as regulatory fines and penalties as well as credit monitoring expenses
with limits sufficient to respond to these obligations.
The required limits may be provided by a combination of General Liability Insurance
and Commercial Excess or Commercial Umbrella Liability Insurance if the umbrella is
at least as broad as the underlying insurance. If the CONTRACTOR maintains
broader coverage and/or higher limits than the minimums shown above, the COUNTY
requires and shall be entitled to the broader coverage and/or the higher limits
maintained by the CONTRACTOR. Any available insurance proceeds in excess of the
specified minimum limits of insurance and coverage shall be available to the
COUNTY.
B. Other Insurance Provisions
The insurance policies are to contain, or be endorsed to contain, the following
provisions:
1. Additional Insured – COUNTY, its officers, officials, employees, agents and
volunteers are to be covered as additional insureds on the CGL policy with
respect to liability arising out of work or operations performed by or on behalf
of the CONTRACTOR including materials, parts, or equipment furnished in
connection with such work or operations. General liability coverage can be
provided in the form of an endorsement to the CONTRACTOR’s insurance at
least as broad as ISO Form ISO Form CG 20 10 11 85 or both CG 20 10, CG
20 26, CG 20 33, or CG 20 38; and CG 20 37 forms if later revisions used).
2. Primary Coverage – For any claims related to this contract, the insurance
coverage shall be primary insurance coverage at least as broad as ISO CG 20
01 04 13 as respects the Entity, its officers, officials, employees, and
volunteers. Any insurance or self-insurance maintained by the Entity, its
officers, officials, employees, or volunteers shall be in excess of the
Contractor’s insurance and shall not contribute with it.
3. Notice of Cancellation – Each insurance policy required above shall provide
that coverage shall not be canceled, except with notice to the COUNTY.
4. Waiver of Subrogation Rights – CONTRACTOR hereby grants to COUNTY
a waiver of any right to subrogation which any insurer of said CONTRACTOR
may acquire against the COUNTY by virtue of the payment of any loss under
such insurance. CONTRACTOR agrees to obtain any endorsement that may
123
be necessary to affect this waiver of subrogation, but this provision applies
regardless of whether or not the COUNTY has received a waiver of subrogation
endorsement from the insurer.
5. Deductibles and Self-Insured Retention – Any deductibles or self-insured
retentions must be declared to and approved by the COUNTY. The COUNTY
may require the CONTRACTOR to purchase coverage with a lower deductible
or retention or provide proof of ability to pay losses and related investigations,
claim administration, and defense expenses within the retention.
6. Acceptability of Insurers – Unless otherwise approved by Risk Management,
insurance shall be written by insurers authorized to do business in the State of
California and with a minimum A.M. Best’s Insurance Guide rating of “A- VII”.
7. Verification of Coverage – CONTRACTOR shall furnish the COUNTY with
proof of insurance, original certificates and amendatory endorsements as
required by this Agreement. The proof of insurance, certificates and
endorsements are to be received and approved by the COUNTY before work
commences. However, failure to obtain the required documents prior to the
work beginning shall not waive the CONTRACTOR’s obligation to provide
them. The CONTRACTOR shall furnish evidence of renewal of coverage
throughout the term of the Agreement. The COUNTY reserves the right to
require complete, certified copies of all required insurance policies, including
endorsements required by these specifications, at any time.
8. Failure to Procure Coverage – In the event that any policy of insurance
required under this Agreement does not comply with the requirements, is not
procured, or is canceled and not replaced, COUNTY has the right but not the
obligation or duty to terminate the Agreement. Maintenance of required
insurance coverage is a material element of the Agreement and failure to
maintain or renew such coverage or to provide evidence of renewal may be
treated by COUNTY as a material breach of contract.
9. Subcontractors – CONTRACTOR shall require and verify that all
subcontractors maintain insurance meeting all the requirements stated herein,
and CONTRACTOR shall ensure that COUNTY is an additional insured on
insurance required from subcontractors.
10. Claims-Made Policies – If any of the required policies provide coverage on a
claims-made basis:
i. The Retroactive Date must be shown and must be before the date of
the contract or the beginning of contract work.
124
ii. Insurance must be maintained, and evidence of insurance must be
provided for at least five (5) years after completion of contract work.
iii. If coverage is canceled or non-renewed and not replaced with another
claims-made policy form with a Retroactive Date prior to the contract
effective date, the CONTRACTOR must purchase “extended
reporting” coverage for a minimum of five (5) years after completion of
contract work.
11. Special Risks or Circumstances – COUNTY reserves the right to modify
these requirements, including limits, based on the nature of the risk, prior
experience, insurer, coverage, or other special circumstances.
Any change requiring additional types of insurance coverage or higher coverage
limits must be made by amendment to this Agreement. CONTRACTOR agrees to execute
any such amendment within thirty (30) days of receipt.
Any failure, actual or alleged, on the part of COUNTY to monitor or enforce
compliance with any of the insurance and indemnification requirements will not be deemed
as a waiver of any rights on the part of COUNTY.
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12.11 COMPENSATION PACKAGE FOR FIELD PERSONNEL
COMPENSATION MATRIX - PARAMEDICS
NEW EMPLOYEE
TWO - YEAR EMPLOYEE
FIVE – YEAR
EMPLOYEE
LOWEST
HIGHEST
MEDIAN
REGULARY SCHEDULED HOURS
PER WEEK
TOTAL PARAMEDICS
FULL – TIME EMPLOYEE
PART – TIME EMPLOYEE
PAID VACATION
(INCLUDING SICK
DAYS)
PAID
HOLLIDAYS
PAID
CONTINUING
EDUCATION
TUITION
REIMBURSMENT
NUMBER OF DAYS PER YEAR
126
EMPLOYER CONTRIBUTION
MEDICAL
DENTAL
VISION
HIGH
MEDIUM
LOW
EMPLOYEE CONTRIBUTION
MEDICAL
DENTAL
VISION
HIGH
MEDIUM
LOW
127
COMPENSATION MATRIX - EMTS
NEW EMPLOYEE
TWO - YEAR EMPLOYEE
FIVE – YEAR
EMPLOYEE
LOWEST
HIGHEST
MEDIAN
REGULARY SCHEDULED HOURS
PER WEEK
TOTAL PARAMEDICS
FULL – TIME EMPLOYEE
PART – TIME EMPLOYEE
PAID VACATION
(INCLUDING SICK
DAYS)
PAID
HOLLIDAYS
PAID
CONTINUING
EDUCATION
TUITION
REIMBURSMENT
NUMBER OF DAYS PER YEAR
128
EMPLOYER CONTRIBUTION
MEDICAL
DENTAL
VISION
HIGH
MEDIUM
LOW
EMPLOYEE CONTRIBUTION
MEDICAL
DENTAL
VISION
HIGH
MEDIUM
LOW
129
12.12 MUTUAL AID AGREEMENT
130
131
132
133
134
12.13 PROVISION FOR FAIRNESS IN GOVERNMENT/ PRIVATE
COMPETITION
PROVISION FOR FAIRNESS IN GOVERNMENT/ PRIVATE COMPETITION
The residents covered by Contra Costa County’s RFP deserve to be served by a
Contractor organization, public or private, which can provide the best Ambulance service
possible for the dollars available. The LEMSA has developed guidelines to manage
participation of a governmental entity or municipal department in this procurement to
ensure a “level playing field.”
Any Contractor (public or private) winning this procurement and awarded the right to
serve does so on a performance basis, subject to a written Agreement as outlined
herein. Should that Contractor default on the terms of the Contract as outlined herein,
the Contract or right to provide that service shall terminate and the LEMSA may operate
the system or competitively procure another Contractor. Any Contractor, including a
governmental entity, which Defaults on its Agreement shall be barred from competing i n
the next procurement cycle.
A private Contractor is financially at risk for its errors in predicting and controlling costs
and revenues to achieve the required performance. Private Contractors risk losses or
bankruptcy should an error be made. The municipal entity, its taxpayers an d users are
not to be liable for any private provider’s errors and are insulated from those errors by
the Performance Security which a private provider posts to guarantee its performance.
Performance security provisions of the Contract provide immediate a ccess to cash and
other remedies for the municipal entity should a private sector default occur.
In a like manner, the municipal entity’s taxpayers and users should not be asked to be
liable for any error made by a governmental entity. Since Performance Security
provisions applicable to private sector Proposers cannot be established for a
governmental entity, it is the LEMSA’s expressed intent not to allow a “taxpayer bail-out”
of any agency, that submits an unrealistically low bid resulting in cost ove rruns or
revenue shortfalls or default.
Therefore, to ensure equity among governmental and private Proposers, the following
guidelines apply to governmental Proposers:
A. A governmental entity must operate within the quality and fee requirements it
proposes—
During the term of the Agreement the governmental entity’s fee shall be annually
increased as provided herein for any other Contractor.
In the event of a Default by a governmental entity as outlined in the RFP,” the
government agency shall continue to temporarily operate the system in a manner
which allows it to comply with all clinical, Response Time and other quality
135
requirements while the LEMSA initiates another procurement cycle to select a
new vendor.
B. A governmental entity, if awarded the Agreement, will be required to account for
funds in such a manner that complies with General Accounting Board principles
and is accepted by the County’s Auditor-Controller’s office. Such funds must
include all assets necessary to deliver the contracted service or absorb a
reasonable cost allocation for use of assets belonging to other funds or account
groups.
1025 ESCOBAR STREET
MARTINEZ, CA 94553CONTRA COSTA COUNTY
Legislation Details (With Text)
File #: Version:125-432 Name:
Status:Type:Consent Item Agenda Ready
File created:In control:2/4/2025 BOARD OF SUPERVISORS
On agenda:Final action:2/4/2025
Title:U.1 RECEIVE a report from the Health Services Department on the February 1 fire at the Martinez
Refining Co. refinery in Martinez.
Attachments:1. 2025-02-04 U.1 Commentary.pdf
Action ByDate Action ResultVer.Tally
U.1 RECEIVE a report from the Health Services Department on the February 1 fire at the Martinez Refining Co. refinery in Martinez.
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1025 ESCOBAR STREET
MARTINEZ, CA 94553CONTRA COSTA COUNTY
Legislation Details (With Text)
File #: Version:125-352 Name:
Status:Type:Consent Item Passed
File created:In control:1/16/2025 BOARD OF SUPERVISORS
On agenda:Final action:2/4/2025 2/4/2025
Title:APPROVE and AUTHORIZE the Director of Airports, or designee, to execute a month-to-month
hangar rental agreement with Russell Atkinson, for a south-facing T-Hangar at Buchanan Field Airport
effective January 22, 2025, in the monthly amount of $372, Pacheco area. (100% Airport Enterprise
Fund)
Attachments:1. Hangar Rental Agmnt - Russell Atkinson
Action ByDate Action ResultVer.Tally
approvedBOARD OF SUPERVISORS2/4/2025 1 Pass
To:Board of Supervisors
From:Greg Baer, Director of Airports
Report Title:Approve and Authorize the Director of Airports, or designee, to execute a hangar rental
agreement with Buchanan Field Airport Hangar tenant
☒Recommendation of the County Administrator ☐ Recommendation of Board Committee
RECOMMENDATIONS:
APPROVE and AUTHORIZE the Director of Airports, or designee, to execute a month-to-month hangar rental
agreement with Russell Atkinson, for a south-facing T-hangar at Buchanan Field Airport effective January 22,
2025, in the monthly amount of $372.00, Pacheco area. (District IV)
FISCAL IMPACT:
The Airport Enterprise Fund will realize $4,464.00 annually.
BACKGROUND:
On November 14, 2006, the Contra Costa County Board of Supervisors approved the form of the T-Hangar and
Shade Hangar Rental Agreement for use with renting the County's t-hangars, shade hangars, medium hangars,
and executive hangars at Buchanan Field Airport.
On February 23, 2007, the Contra Costa County Board of Supervisors approved the new Large Hangar Rental
Agreement for use with the large East Ramp Hangars.
On January 16, 2009, the Contra Costa County Board of Supervisors approved an amendment to the T-Hangar
and Shade Hangar Rental Agreement and the Large Hangar Rental Agreement (combined "Hangar Rental
Agreements"). The Hangar Rental Agreements are the current forms in use for rental of all the County hangars
at Buchanan Field Airport.
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File #:25-352,Version:1
CONSEQUENCE OF NEGATIVE ACTION:
A negative action will cause a loss of revenue to the Airport Enterprise Fund.
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1025 ESCOBAR STREET
MARTINEZ, CA 94553CONTRA COSTA COUNTY
Legislation Details (With Text)
File #: Version:125-353 Name:
Status:Type:Consent Item Passed
File created:In control:1/7/2025 BOARD OF SUPERVISORS
On agenda:Final action:2/4/2025 2/4/2025
Title:ACCEPT the monetary donation report from the Animal Services Department, which describes the
source and value of each gift received by Animal Services for FY 2024/25, Quarter 2: October 1, 2024
through December 31, 2024. (No fiscal impact)
Attachments:1. 2024.25_FY Q2 ABF Donations Report
Action ByDate Action ResultVer.Tally
approvedBOARD OF SUPERVISORS2/4/2025 1 Pass
To:Board of Supervisors
From:Ben Winkleblack, Animal Services Director
Report Title:Monetary donation report from the Animal Services Department for FY 2024/25, Quarter 2:
October 1, 2024 through December 31, 2024.
☒Recommendation of the County Administrator ☐ Recommendation of Board Committee
RECOMMENDATIONS:
ACCEPT the monetary donation report from the Animal Services Department, which describes the source and
value of each gift received by Animal Services for FY 2024/25, Quarter 2: October 1, 2024 through December
31, 2024.
FISCAL IMPACT:
This is an informational item only. No fiscal impact. The total value of donations received during FY 2024/25,
Quarter 2 is $67,344.63.
BACKGROUND:
In 1998, the Animal Benefit Fund was created by the Animal Services Department to allow the Department to
receive donations from individuals, animal welfare organizations and businesses to support animal health and
welfare projects that are not funded by departmental or general County revenue. On April 19, 2016, the Board
of Supervisors delegated specific authority to the Animal Services Director to accept any monetary donation,
gift, bequest, or device made to or in favor of the Contra Costa County Animal Services Department, as
allowed under Government Code section 25355, and to solicit donations for the benefit of shelter animals.
Along with this delegated authority, the Animal Services Director must file a report with the Board of
Supervisors every quarter that describes the source and value of each gift.
On December 8, 2020, the Board of Supervisors adopted Resolution No. 2020/326, which authorized the
Animal Services Director to implement the following programs within the Animal Benefit Fund beginning FY
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File #:25-353,Version:1
2021/22:
1. Medical Assistance Program: This program is for medical assistance and emergency veterinary care for
animals that are in the County's jurisdiction and/or have been accepted into the County shelter’s care. Funds are
used for medical care over and above the mandated medical care for animals in the care of the shelter and that
need further assistance to be made available for adoption or released to a transfer agency. Funds may also be
used to provide necessary medical care to an animal to help keep the animal out of the shelter.
2. Humane Education Program: This program helps to support humane education services at the County animal
shelter and within the community. Humane education support may also be used to help pet owners resolve
behavioral problems that might otherwise cause them to give up their pet, to help shelter animals with
behavioral issues that might keep them from being easily adopted, and to create humane education programs
for school age children.
3. Shelter Intervention Program: Often, families in a crisis turn to surrendering their pet to a shelter due to lack
of financial resources. The intervention program helps to provide resources to keep animals in their homes.
Examples of intervention tools: spay/neuter, behavior/training assistance, fence repair and grooming. This
program may also be used to help domestic violence victims or seniors on limited incomes to keep their pets in
their lives when they may otherwise have had to consider relinquishment due to lack of funds for basic daily
needs or medical concerns.
4. Spay Neuter and Wellness Program: This program allows spay/neuter, vaccinations, and microchips to be
more affordable and accessible in Contra Costa County. Contra Costa Animal Services accomplishes this by
establishing partnerships and is developing mobile programs to reach into the areas of the County in greatest
need, targeting the species/breeds of animals most likely to be found in the County shelter, and supporting
healthy community cats through TNR/RTF (trap-neuter-return / return- to-field) and Working Cat Adoptions.
CONSEQUENCE OF NEGATIVE ACTION:
Failure to accept the report will delay the information the Board of Supervisors has requested.
CONTRA COSTA COUNTY Printed on 4/4/2025Page 2 of 2
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Animal Services Department FY 2024/25 Donation Report Quarter 2 - 10/01/24 -12/31/24
Program Description Date Posted Amount
GENERAL ABF WEB DONATION 10/2/2024 $50.00
GENERAL ABF WEB DONATION 10/2/2024 $520.00
GENERAL ABF GENERAL DONATION 10/2/2024 $9.52
GENERAL ABF GENERAL DONATION 10/3/2024 $56.68
GENERAL ABF GENERAL DONATION 10/3/2024 $10,260.00
GENERAL ABF GENERAL DONATION 10/4/2024 $6,574.43
GENERAL ABF GENERAL DONATION 10/4/2024 $31.14
GENERAL ABF GENERAL DONATION 10/7/2024 $350.00
GENERAL ABF GENERAL DONATION 10/10/2024 $1,000.00
GENERAL ABF WEB DONATION 10/10/2024 $400.00
GENERAL ABF GENERAL DONATION 10/17/2024 $1,172.50
GENERAL ABF GENERAL DONATION 10/17/2024 $275.00
GENERAL ABF WEB DONATION 10/21/2024 $10.00
GENERAL ABF WEB DONATION 10/21/2024 $750.00
GENERAL ABF WEB DONATION 10/22/2024 $20.00
GENERAL ABF GENERAL DONATION 10/24/2024 $75.00
GENERAL ABF GENERAL DONATION 10/24/2024 $33.41
GENERAL ABF WEB DONATION 10/24/2024 $100.00
GENERAL ABF GENERAL DONATION 10/25/2024 $2,731.11
GENERAL ABF GENERAL DONATION 10/25/2024 $600.00
GENERAL ABF GENERAL DONATION 10/25/2024 -$75.00
GENERAL ABF GENERAL DONATION 10/25/2024 $75.00
GENERAL ABF GENERAL DONATION 10/28/2024 $6.00
GENERAL ABF GENERAL DONATION 10/28/2024 $18.00
GENERAL ABF GENERAL DONATION 10/28/2024 $6.00
GENERAL ABF GENERAL DONATION 10/28/2024 $18.00
GENERAL ABF GENERAL DONATION 10/28/2024 $75.00
GENERAL ABF GENERAL DONATION 10/30/2024 $20.76
GENERAL ABF GENERAL DONATION 10/30/2024 $12.00
GENERAL ABF GENERAL DONATION 10/30/2024 $40.00
GENERAL ABF GENERAL DONATION 10/31/2024 $6,287.59
GENERAL ABF GENERAL DONATION 10/31/2024 $7,310.00
GENERAL ABF GENERAL DONATION 10/31/2024 $481.31
GENERAL ABF GENERAL DONATION 10/31/2024 $50.00
GENERAL ABF GENERAL DONATION 11/1/2024 $10.00
GENERAL ABF WEB DONATION 11/1/2024 $100.00
GENERAL ABF GENERAL DONATION 11/1/2024 $0.12
GENERAL ABF WEB DONATION 11/4/2024 $500.00
GENERAL ABF GENERAL DONATION 11/6/2024 $100.00
GENERAL ABF GENERAL DONATION 11/12/2024 $125.00
GENERAL ABF GENERAL DONATION 11/12/2024 $1,593.51
GENERAL ABF GENERAL DONATION 11/14/2024 $270.00
GENERAL ABF GENERAL DONATION 11/15/2024 $430.00
GENERAL ABF WEB DONATION 11/15/2024 $40.00
GENERAL ABF GENERAL DONATION 11/22/2024 $162.61
GENERAL ABF GENERAL DONATION 11/22/2024 $565.93
GENERAL ABF GENERAL DONATION 11/22/2024 $15.00
GENERAL ABF GENERAL DONATION 11/27/2024 $20.76
GENERAL ABF GENERAL DONATION 12/2/2024 $3,164.93
GENERAL ABF GENERAL DONATION 12/4/2024 $1,000.00
GENERAL ABF GENERAL DONATION 12/6/2024 -$969.58
GENERAL ABF GENERAL DONATION 12/6/2024 -$4,493.13
GENERAL ABF WEB DONATION 12/9/2024 $25.00
GENERAL ABF WEB DONATION 12/9/2024 $540.00
Animal Services Department FY 2024/25 Donation Report Quarter 2 - 10/01/24 -12/31/24
GENERAL ABF WEB DONATION 12/9/2024 $1,900.00
GENERAL ABF WEB DONATION 12/9/2024 $75.00
GENERAL ABF GENERAL DONATION 12/9/2024 $6.00
GENERAL ABF WEB DONATION 12/9/2024 $25.00
GENERAL ABF WEB DONATION 12/9/2024 $50.00
GENERAL ABF WEB DONATION 12/9/2024 $100.00
GENERAL ABF GENERAL DONATION 12/9/2024 $1,150.52
GENERAL ABF GENERAL DONATION 12/11/2024 $550.00
GENERAL ABF GENERAL DONATION 12/11/2024 $5.00
GENERAL ABF GENERAL DONATION 12/11/2024 $1,026.00
GENERAL ABF GENERAL DONATION 12/11/2024 $65.01
GENERAL ABF WEB DONATION 12/17/2024 $50.00
GENERAL ABF WEB DONATION 12/17/2024 $975.00
GENERAL ABF WEB DONATION 12/18/2024 $2,000.00
GENERAL ABF GENERAL DONATION 12/18/2024 $200.00
GENERAL ABF GENERAL DONATION 12/18/2024 $300.00
GENERAL ABF WEB DONATION 12/20/2024 $550.00
GENERAL ABF WEB DONATION 12/20/2024 $70.00
GENERAL ABF WEB DONATION 12/20/2024 $100.00
GENERAL ABF WEB DONATION 12/20/2024 $400.00
GENERAL ABF GENERAL DONATION 12/20/2024 $2,330.00
GENERAL ABF GENERAL DONATION 12/20/2024 $150.50
GENERAL ABF GENERAL DONATION 12/23/2024 $6.00
GENERAL ABF GENERAL DONATION 12/23/2024 $5,435.00
GENERAL ABF WEB DONATION 12/26/2024 $3,950.00
GENERAL ABF WEB DONATION 12/26/2024 $100.00
GENERAL ABF WEB DONATION 12/26/2024 $1,600.00
GENERAL ABF WEB DONATION 12/27/2024 $25.00
GENERAL ABF GENERAL DONATION 12/30/2024 $1,017.00
GENERAL ABF GENERAL DONATION 12/30/2024 $210.00
GENERAL ABF WEB DONATION 12/30/2024 $195.00
GENERAL ABF GENERAL DONATION 12/30/2024 $185.00
TOTAL $67,344.63
Summary by Donation Type
Type Total
WEB DONATION $15,220.00
GENERAL DONATION $52,124.63
TOTAL SUM TOTAL SUM $67,344.63
1025 ESCOBAR STREET
MARTINEZ, CA 94553CONTRA COSTA COUNTY
Legislation Details (With Text)
File #: Version:125-354 Name:
Status:Type:Consent Item Passed
File created:In control:1/17/2025 BOARD OF SUPERVISORS
On agenda:Final action:2/4/2025 2/4/2025
Title:APPROVE and AUTHORIZE the allocation of $127,317 from the Crockett-Cogeneration Property Tax
Allocation for four projects, as recommended by the Crockett Community Foundation and Supervisor
Scales-Preston. (100% General Fund)
Attachments:1. Resolution 2024-1.pdf
Action ByDate Action ResultVer.Tally
approvedBOARD OF SUPERVISORS2/4/2025 1 Pass
To:Board of Supervisors
From:Shanelle Scales-Preston, District V Supervisor
Report Title:Crockett Co-Generation Property Tax Distribution
☐Recommendation of the County Administrator ☐ Recommendation of Board Committee
RECOMMENDATIONS:
APPROVE and AUTHORIZE the allocation of $127,317 from the Crockett Co-Generation Property Tax
Allocation for four projects, as recommended by the Crockett Community Foundation and Supervisor Scales-
Preston.
FISCAL IMPACT:
100% General Fund.
BACKGROUND:
In September 1995, the Board of Supervisors appointed the Crockett Community Foundation as the advisory
council to the Board regarding expenditures from the Community Benefits Program funded from property tax
assessments on the Crockett Co-Generation Plant.
On December 5, 2024, by the attached Resolution 2024-1, the Crockett Community Foundation recommended
that $127,317 in property taxes obtained from the Crockett Co-Generation Plant be allocated to the Crockett
Community Foundation as follows:
1.$20,000.00 for the benefit of the Crockett Library to continue to provide six (6) additional hours of
operation; and
2.$45,092.16 for the benefit of the Crockett Recreation Department to augment funding for capital
improvements and maintenance at the Crockett Community Center, swimming pool, Alexander Park
facility, along with utilities and landscaping at Crockett’s Memorial Hall Park; and
3.$30,142.65 for the benefit of the Crockett Carquinez Fire Department to augment funding for capital
equipment and projects at its facilities; and
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File #:25-354,Version:1
4.$32,082.19 for the benefit of the Crockett Sanitary Department to fund capital improvements in
wastewater collection and treatment.
This request for the release of funds was forwarded to the County Administrator’s Office for approval and
processing.
CONSEQUENCE OF NEGATIVE ACTION:
If the action is not approved, the community benefit plan developed by the Crockett Community Foundation for
the allocation of return-to-source funds would be disrupted, resulting in a decreased amount of public services
in the community of Crockett.
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1025 ESCOBAR STREET
MARTINEZ, CA 94553CONTRA COSTA COUNTY
Legislation Details (With Text)
File #: Version:1RES 2025-22 Name:
Status:Type:Consent Resolution Passed
File created:In control:1/28/2025 BOARD OF SUPERVISORS
On agenda:Final action:2/4/2025 2/4/2025
Title:ADOPT Resolution No. 2025-22 proclaiming African American Mental Health Awareness Week
February 16-22, 2025 and Miles Hall Day of Remembrance February 15, 2025 and Tyrell Wilson Day
of Remembrance March 8, 2025, as recommended by Supervisor Andersen.
Attachments:1. Resolution No. 2025-22.pdf
Action ByDate Action ResultVer.Tally
adoptedBOARD OF SUPERVISORS2/4/2025 1 Pass
To:Board of Supervisors
From:Candace Andersen, District II Supervisor
Report Title:Acknowledgement of African American Mental Health Awareness Week February 16-22,
2025 and Miles Hall Day of Remembrance February 15, 2025 and Tyrell Wilson Day of Remembrance
March 8, 2025
☒Recommendation of the County Administrator ☐ Recommendation of Board Committee
RECOMMENDATIONS:
Acknowledgement of African American Mental Health Awareness Week February 16-22, 2025 and Miles
Hall Day of Remembrance February 15, 2025 and Tyrell Wilson Day of Remembrance March 8, 2025
FISCAL IMPACT:
No fiscal impact
BACKGROUND:
Acknowledgement of African American Mental Health Awareness Week February 16-22, 2025 and Miles
Hall Day of Remembrance February 15, 2025 and Tyrell Wilson Day of Remembrance March 8, 2025
CONSEQUENCE OF NEGATIVE ACTION:
No Negative action
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File #:RES 2025-22,Version:1
The Board of Supervisors of Contra Costa County, California
Acknowledgement of African American Mental Health Awareness Week
February 16-22, 2025
and
Miles Hall Day of Remembrance
February 15, 2025
and
Tyrell Wilson Day of Remembrance
March 8, 2025
WHEREAS,the Contra Costa County Board of Supervisors declares February 16-22,2025,as African
American Mental Health Awareness Week;and,February 15,2025 as Miles Hall Day of Remembrance;and,
March 8, 2025 as Tyrell Wilson Day of Remembrance; and
WHEREAS,in the African American community there is a need to support the recovery process of peers,
clients,consumers and family members impacted by mental health and substance use issues through the
delivery of well-funded culturally responsive,community-defined and honoring services;including,but not
limited to, the incorporation of identified spiritual and faith practices and beliefs when requested; and
WHEREAS,mental health and substance use issues,as well as the devastating impact of the racialized police
text messages scandal in East County,continue to be traumatic experiences resulting in the continued unease
and lack of well-being experienced by African Americans in this County; and
WHEREAS,scientific studies show when services are delivered by individuals reflective of those served andCONTRA COSTA COUNTY Printed on 4/4/2025Page 2 of 3
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WHEREAS,scientific studies show when services are delivered by individuals reflective of those served and
faith and spiritual practices are included as a part of the recovery plan,the peer,client,consumer along with the
behavioral health system experience shorter recovery times, fewer relapses, and fewer hospitalizations; and
WHEREAS,Contra Costa Health-Behavioral Health Services and its community partners have been
committed to inclusion of client voice and of employment of persons with lived experience for the last 30 years
in an effort to better reflect and celebrate the cultural and racial diversity in Contra Costa County.It recognizes
that for some community members,faith and spirituality play an important role in their wellness and recovery,
and that community defined practices often are healing; and
WHEREAS,NAMI Contra Costa,the 40 Voices Campaign,peers,clients,consumers,family members,
providers,spiritual leaders,Village Keepers,Miles Hall Foundation and other African American-led
organizations are working hard to support and protect families by advocating for the implementation of the
African American Holistic Wellness and Resource Hub and,educating communities about mental illness and
protecting those living with mental illness from unjust practices and harm by supporting the Miles Hall
Community Crisis Hub and other non-police response programming;and,all interested stakeholders can
participate in the February 28,2025,Mental Health Awareness Black History Event,the Miles Hall Foundation
activities,and ongoing efforts to replace misinformation about mental health,erase prejudice,fear and blame,
thereby reducing stigma and disparities that negatively impact unserved,underserved and inappropriately
served communities by helping restore mental health wellness,and reimagining safety for ALL in Contra Costa
County.
NOW,THEREFORE,BE IT RESOLVED this Board of Supervisors,County of Contra Costa,State of
California proclaims February 16-22,2025 as African American Mental Health Awareness Week,February 15,
2025 as the Miles Hall Day of Remembrance,and March 8,2025 as Tyrell Wilson,Day of Remembrance,and
encourages everyone to participate in this important series of events.
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1025 ESCOBAR STREET
MARTINEZ, CA 94553CONTRA COSTA COUNTY
Legislation Details (With Text)
File #: Version:1RES 2025-23 Name:
Status:Type:Consent Resolution Passed
File created:In control:1/29/2025 BOARD OF SUPERVISORS
On agenda:Final action:2/4/2025 2/4/2025
Title:ADOPT Resolution No. 2025-23 recognizing the 80th Anniversary of Bayo Vista First Baptist Church,
as recommended by Supervisor Scales-Preston.
Attachments:1. Resolution No. 2025-23.pdf
Action ByDate Action ResultVer.Tally
adoptedBOARD OF SUPERVISORS2/4/2025 1 Pass
To:Board of Supervisors
From:Shanelle Scales-Preston, District V Supervisor
Report Title:Proclamation Recognizing the 80th Anniversary of Bayo Vista First Baptist Church
☒Recommendation of the County Administrator ☐ Recommendation of Board Committee
RECOMMENDATIONS:
ADOPT RESOLUTION NO. 2025-Proclamation Recognizing the 80th Anniversary of Bayo Vista First Baptist
Church
FISCAL IMPACT:
None.
BACKGROUND:
See Resolution.
CONSEQUENCE OF NEGATIVE ACTION:
N/A
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File #:RES 2025-23,Version:1
The Board of Supervisors of Contra Costa County, California
IN THE MATTER OF
Proclamation Recognizing the 80th Anniversary of Bayo Vista First Baptist Church
WHEREAS, Bayo Vista First Baptist Church has been an integral part of the Rodeo community for 80 years,
serving as a source of inspiration and a beacon of hope for residents and families in Rodeo, California; and
WHEREAS, the church has consistently demonstrated its unwavering commitment to community service by
providing critical resources such as feeding the homeless, distributing clothing, and spearheading impactful
outreach programs that enhance the lives of those in need; and
WHEREAS, Bayo Vista First Baptist Church continues to foster a safe, welcoming, and spiritually enriching
environment for the community, creating a space where individuals can worship, grow, and unite in faith and
fellowship; and
WHEREAS, the church will commemorate this historic 80-year milestone with a joyous celebration on
Sunday, February 9, 2025, at 3:30 p.m., under the theme,"Jesus is still in the Midst"- Isaiah 12:6, which
reflects the enduring strength, faith, and resilience of the church and its congregation; and
WHEREAS, for eight decades, Bayo Vista First Baptist Church has been a cornerstone of spiritual guidance
and community support, uplifting its members and strengthening the broader Rodeo community through
worship, service, and unity; and
WHEREAS, the Board of Supervisors of Contra Costa County formally recognizes and extends its deepest
gratitude to Bayo Vista First Baptist Church for 80 years of remarkable service and dedication, profoundly
enriching the Rodeo community and making it a better place to live, worship, and thrive.
Now, Therefore, Be It Resolved, that the Contra Costa County Board of Supervisors, do hereby commend and
congratulate Bayo Vista First Baptist Church on its 80th Anniversary and proclaim February 2025 as a time to
honor and celebrate the church’s legacy of faith, service, and community impact.
Signed,
Contra Costa County Board of Supervisors
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MARTINEZ, CA 94553CONTRA COSTA COUNTY
Legislation Details (With Text)
File #: Version:225-355 Name:
Status:Type:Consent Item Passed
File created:In control:1/9/2025 BOARD OF SUPERVISORS
On agenda:Final action:2/4/2025 2/4/2025
Title:REAPPOINT Willie J. Robinson to the District 1, Seat 2 on the Measure X Community Advisory Board
for a term ending on March 31, 2027, as recommended by Supervisor Gioia.
Attachments:
Action ByDate Action ResultVer.Tally
approvedBOARD OF SUPERVISORS2/4/2025 2 Pass
To:Board of Supervisors
From:John Gioia, District I Supervisor
Report Title:REAPPOINT Willie J. Robinson to the District 1, Seat 2 for the Measure X Community
Advisory Board for a term ending on March 31, 2027
☒Recommendation of the County Administrator ☐ Recommendation of Board Committee
RECOMMENDATIONS:
REAPPOINT Willie J. Robinson to the District 1, Seat 2 for the Measure X Community Advisory Board for a
term ending on March 31, 2027
FISCAL IMPACT:
none
BACKGROUND:
The Measure X Community Advisory Board was established by the Board of Supervisors on February 2, 2021
to advise the Board of Supervisors on the use of Measure X transactions and use tax funds
CONSEQUENCE OF NEGATIVE ACTION:
The appointment would not be made and the District would not have representation on the commission
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1025 ESCOBAR STREET
MARTINEZ, CA 94553CONTRA COSTA COUNTY
Legislation Details (With Text)
File #: Version:125-356 Name:
Status:Type:Consent Item Passed
File created:In control:1/23/2025 BOARD OF SUPERVISORS
On agenda:Final action:2/4/2025 2/4/2025
Title:ACCEPT the Contra Costa County Measure X Community Advisory Board (MXCAB) 2024 Advisory
Body Annual Report.
Attachments:1. MXCAB Advisory Body Annual Report FINAL 2024
Action ByDate Action ResultVer.Tally
approvedBOARD OF SUPERVISORS2/4/2025 1 Pass
To:Board of Supervisors
From:Monica Nino, County Administrator
Report Title:Measure X Community Advisory Board 2024 Advisory Body Annual Report
☒Recommendation of the County Administrator ☐ Recommendation of Board Committee
RECOMMENDATIONS:
ACCEPT the Contra Costa County Measure X Community Advisory Board (MXCAB) 2024 Advisory Body
Annual Report.
FISCAL IMPACT:
Acceptance of the Measure X Community Advisory Board 2024 Advisory Body Annual Report has no fiscal
impact.
BACKGROUND:
On January 7, 2020, the Board of Supervisors adopted Resolution No. 2020/1, which requires that each regular
and ongoing board, commission, or committee annually report to the Board of Supervisors on its activities,
accomplishments, membership attendance, required training/certification (if any), and proposed work plan or
objectives for the following year. Attached, please find the Measure X Community Advisory Board Advisory
Body Annual Report.
CONSEQUENCE OF NEGATIVE ACTION:
If unapproved, the Measure X Community Advisory Board will not be in compliance with Resolution No.
2020/1.
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Advisory Body Name:
Advisory Body Meeting Time/Location:
Chair (during the reporting period):
Staff Person (during the reporting period):
Reporting Period:
I. Activities (estimated response length: 1/2 page)
Describe the DFWLYLWLHV for the past year including areas of study, workspecial events,
collaborations, etc.
ADVISORY BODY ANNUAL REPORT
II. Accomplishments (estimated response length: 1/2 page)
Describe the accomplishments for the past year, particularly in reference to your work plan and
objectives.
Measure X Communnity Advisory Board
5:00 pm, 3rd Wed. monthly at 1025 Escobar Street, Martinez & via Zoom
Roxanne Carrillo-Garza (Mar-Dec),Mariana Moore(Jan-Mar)
Adam Nguyen, Emlyn Struthers
Adam Nguyen, Emlyn Struthers
1. MXCAB worked primarily on aggregating community input, MXCAB
recommendations, and prior allocations via the community recommendations tracker
and MXCAB memos and other documents in order to prepare for MXCAB's one-time
funding recommendations
2. Presentation of Priority Recommendations at the April 2024 Board of Supervisors
budget hearing
3. MXCAB working group developed a framework for a Retreat with guidance from a
consultant
4. July 2024 MXCAB retreat was held with a majority of members participating
5. Developed April 2024 Priority Recommendations that were presented to Board of
Supervisors during the budget hearing
1. April 2024 MXCAB Priority Recommendations Memo and resulting allocations
(several recommendations were funded)
2. July 2024 Member Retreat that resulted in updates in the Measure X CAB Operating
Principles and greater cohesiveness of membership, reviewed our charge, and shared
ideas for our future work plan
3. November 2024 joint meeting: MXCAB presentation and dialogue with Board of
Supervisors and Priority Recommendations Memo
4. December 2024 MXCAB Memo was sent to the Board of Supervisors focused on
recommendations for the Joint MX meeting with a request to review the memo in the
first quarter of 2025
III. Attendance/Representation (estimated response length: 1/4 page)
Describe your membership in terms of seat vacancies, Giversity, level of participation, and
frequency of achieving a quorum at meetings.
Describe the advisory body's workplan, including specific objectives to be achieved in the
upcoming year.
V. Proposed Work Plan/Objectives for Next Year
IV. Training/Certification (estimated response length: 1/4 page)
Describe any training that was provided or conducted, and any certifications received, either as a
requirement or done on an elective basis by members. NOTE: Please forward copies of any
training certifications to the Clerk of the Board.
(estimated response length: 1/2 page)
The MXCAB currently has 7 vacancies, including 2 At-Large, 2 District and 3 District
Alternate seats. Quorum was achieved at all of the 12 scheduled meetings for the year.
As intended when appointed by the Board of Supervisors, MXCAB members represent
a diverse cross-section of the county, including race/ethnicity, professional expertise,
lived experience, and life perspectives.
20 of the 27 total seats on MXCAB are currently filled. Of the 20 members, 19 members
have completed both the Brown Act and Ethics trainings, and 18 have completed the
Implicit Bias training.
1. MXCAB follow up with the Board of Supervisors on December Memo
2. Follow up on General Guidelines Memo
3. MXCAB research the Results Based Accountability (RBA) model as a method to
assess the meaningful impact of MX funded projects
4. Discuss potential process for Community Needs Assessment
4. Receive updates from MXCAB members and Departments
5. Prepare for 2025 Joint Board of Supervisors-MXCAB meeting
1025 ESCOBAR STREET
MARTINEZ, CA 94553CONTRA COSTA COUNTY
Legislation Details (With Text)
File #: Version:125-357 Name:
Status:Type:Consent Item Passed
File created:In control:1/24/2025 BOARD OF SUPERVISORS
On agenda:Final action:2/4/2025 2/4/2025
Title:ACCEPT the resignation of Linda Schultz, DECLARE a vacancy in the Appointee 3 Seat on the
County Service Area P-5 Citizen Advisory Committee for a term ending December 31, 2025, and
DIRECT the Clerk of the Board to post the vacancy as recommended by Supervisor Andersen.
Attachments:
Action ByDate Action ResultVer.Tally
approvedBOARD OF SUPERVISORS2/4/2025 1 Pass
To:Board of Supervisors
From:Candace Andersen, District II Supervisor
Report Title:RESIGNATION FROM THE COUNTY SERVICE AREA P-5 CITIZEN ADVISORY
COMMITTEE
☒Recommendation of the County Administrator ☐ Recommendation of Board Committee
RECOMMENDATIONS:
ACCEPT the resignation of Linda Schultz effective immediately; DECLARE a vacancy in the Appointee 3 Seat
on the County Service Area P-5 Citizen Advisory Committee, and DIRECT the Clerk of the Board to post the
vacancies, for term ending December 31, 2025 as recommended by Supervisor Candace Andersen.
FISCAL IMPACT:
none
BACKGROUND:
Established on April 18, 1972, by Resolution Number 72/257, the purpose of the County Service Area P-5
Citizen Advisory Committee is to act as a liaison between the citizens of the P-5 Police District and the Office
of the Sheriff of Contra Costa County by: Advising the Board of Supervisors and the Office of the Sheriff of the
community's needs and desires regarding police protection; Promoting public safety in the areas of home safety,
traffic safety, vacation security and crime prevention through the neighborhood watch program; and
maintaining oversight of expenditures of the public funds accruing in the P-5 Police District.
CONSEQUENCE OF NEGATIVE ACTION:
The seat will not be vacated.
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1025 ESCOBAR STREET
MARTINEZ, CA 94553CONTRA COSTA COUNTY
Legislation Details (With Text)
File #: Version:125-358 Name:
Status:Type:Consent Item Passed
File created:In control:1/23/2025 BOARD OF SUPERVISORS
On agenda:Final action:2/4/2025 2/4/2025
Title:ACCEPT the Contra Costa County Measure X Community Fiscal Oversight Committee (MXCFOC)
2024 Advisory Body Annual Report.
Attachments:1. 2024 Measure X Fiscal Oversight Committee Annual Report Final
Action ByDate Action ResultVer.Tally
approvedBOARD OF SUPERVISORS2/4/2025 1 Pass
To:Board of Supervisors
From:Monica Nino, County Administrator
Report Title:Measure X Community Fiscal Oversight Committee 2024 Advisory Body Annual Report
☒Recommendation of the County Administrator ☐ Recommendation of Board Committee
RECOMMENDATIONS:
ACCEPT the Contra Costa County Measure X Community Fiscal Oversight Committee (MXCFOC) 2024
Advisory Body Annual Report.
FISCAL IMPACT:
Acceptance of the Measure X Community Fiscal Oversight Committee 2024 Advisory Body Annual Report has
no fiscal impact.
BACKGROUND:
On January 7, 2020, the Board of Supervisors adopted Resolution No. 2020/1, which requires that each regular
and ongoing board, commission, or committee annually report to the Board of Supervisors on its activities,
accomplishments, membership attendance, required training/certification (if any), and proposed work plan or
objectives for the following year. Attached, please find the Measure X Community Fiscal Oversight Committee
Advisory Body Annual Report.
CONSEQUENCE OF NEGATIVE ACTION:
If unapproved, the Measure X Community Fiscal Oversight Committee will not be in compliance with
Resolution No. 2020/1.
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Advisory Body Name:
Advisory Body Meeting Time/Location:
Chair (during the reporting period):
Staff Person (during the reporting period):
Reporting Period:
I. Activities (estimated response length: 1/2 page)
Describe the DFWLYLWLHV for the past year including areas of study, workspecial events,
collaborations, etc.
ADVISORY BODY ANNUAL REPORT
II. Accomplishments (estimated response length: 1/2 page)
Describe the accomplishments for the past year, particularly in reference to your work plan and
objectives.
Measure X Fiscal Oversight Committee
At Least Quarterly - 5:00 PM - County Administrative Offices, Martinez, CA
Greg Marvel
Emlyn Struthers
1/1/24 - 12/31/2024
The Fiscal Oversight Committee undertook the following activities during the reporting
period:
1. Had our first meeting with four of the five committee assignments filled.
2. Committee's charge was reviewed and the committee selected a chair.
3. Determined the areas of study under the purview of the committee and then reviewed
staff reports and outside audit reports of the Measure X allocations and expenditures.
4. Prepared a report outlining the committee's findings and submittal to the Board of
Supervisors.
1. Normal review is fiscal year based. However, as this committee was just recently
appointed, the period of our initial review was 4/1/21 through 6/30/24. The committee
reviewed the expenditures of tax revenue generated by Measure X, to ensure that those
expenditures conformed to the stated intent of the ballot measure that was approved by
the voters of Contra Costa County.
2. Reviewed the Measure X expenditures to ensure the funds were spent in
conformance with the Board of Supervisors’ specific directions and allocations.
3. Oversaw an annual audit of expenditures of the tax revenue generated by Measure X.
4. Prepared an annual report of expenditures of tax revenue generated by Measure X.
5. The Committee approved the annual report and found that the allocations and
expenditures during the period 4/1/21 through 6/30/24 were in conformance and
compliance with the stated intent of Measure X.
III. Attendance/Representation (estimated response length: 1/4 page)
Describe your membership in terms of seat vacancies, Giversity, level of participation, and
frequency of achieving a quorum at meetings.
Describe the advisory body's workplan, including specific objectives to be achieved in the
upcoming year.
V. Proposed Work Plan/Objectives for Next Year
IV. Training/Certification (estimated response length: 1/4 page)
Describe any training that was provided or conducted, and any certifications received, either as a
requirement or done on an elective basis by members. NOTE: Please forward copies of any
training certifications to the Clerk of the Board.
(estimated response length: 1/2 page)
The membership of the committee is composed of one representative from each of the
supervisorial areas. There are currently two vacancies, the District III and District V seat.
This number fulfilled the requirements of a quorum and thus meetings could be held. All
appointed committee members meet in the Fall of 2024 in our committee's first
organizing meeting to establish what needed to be accomplished. There were sufficient
committee members in attendance at each meeting to constitute a quorum and continue
the work of the committee.
At our first committee meeting, County staff provided invaluable training and information
about the role of the committee, the the committee's mandates under Measure X. Staff
was very helpful in bringing the new committee members up-to-speed on committee's
functions and responsibilities. All three of the current members have completed the
required Brown Act, Ethics and Implicit Bias trainings.
1. Normal review is fiscal year based. The committee will review the Measure X
allocations and expenditures from 7/1/24 through 6/30/25. The purpose of the review will
be to ensure that those allocations and expenditures related to Measure X are in
conformance with the stated intent of the ballot measure that was approved by the
voters of Contra Costa County.
2. Review the Measure X expenditures to ensure the funds were spent in conformance
with the Board of Supervisors’ specific directions and allocations.
3. Oversee an annual audit of expenditures of the tax revenue generated by Measure X.
for the period 7/1/24 through 6/30/25.
4. Prepare an annual report of expenditures of tax revenue generated by Measure X for
the period 7/1/24 through 6/30/25.
5. Have the committee approve the annual report that makes findings on the
appropriateness of the allocations and expenditures related to Measure X for the period
7/1/24 through 6/30/2025 and have that reported submitted to the Board of Supervisors.
1025 ESCOBAR STREET
MARTINEZ, CA 94553CONTRA COSTA COUNTY
Legislation Details (With Text)
File #: Version:125-359 Name:
Status:Type:Consent Item Passed
File created:In control:1/17/2025 BOARD OF SUPERVISORS
On agenda:Final action:2/4/2025 2/4/2025
Title:APPROVE and AUTHORIZE the Purchasing Agent to execute, on behalf of the Clerk-Recorder, a
purchase order with General Data Tech, LP, in an amount not to exceed $6,268 and a related service
agreement with NetApp to provide secure electronic data storage, support, and maintenance for the
period April 1, 2025 through March 31, 2026. (100% Recorder Micrographics/Modernization Fund)
Attachments:
Action ByDate Action ResultVer.Tally
approvedBOARD OF SUPERVISORS2/4/2025 1 Pass
To:Board of Supervisors
From:Kristin Connelly, Clerk-Recorder
Report Title:General Datatech, L.P. for NetApp Support and Maintenance
☒Recommendation of the County Administrator ☐ Recommendation of Board Committee
RECOMMENDATIONS:
APPROVE and AUTHORIZE the Purchasing Agent to execute, on behalf of the Clerk-Recorder, a purchase
order with GDT (General Datatech, LP) in an amount not to exceed $6,268 and a related service agreement
with NetApp to provide secure electronic data storage, support, and maintenance for the period April 1, 2025,
through March 31, 2026.
FISCAL IMPACT:
The total purchase of $6,268 will not have any impact on the General Fund as it will be funded by the
Department’s Modernization dedicated Fund.
Extending the support saves the Department money, once support runs out, and the servers reach end-of-life,
they must be replaced.
BACKGROUND:
The Clerk-Recorder’s Office stores the entirety of its electronic data on two clustered NetApp Systems. This
solution has been serving the department well over the last 15 years. NetApp storage systems are known for
their reliability and high performance, which is necessary when handling the public record which is stored in
perpetuity.
NetApp storage solutions are highly scalable, allowing the Clerk-Recorder to easily expand capacity and data
needs. Since 2006 the department has gone from 5TB of storage to 216TB of storage. This scalability ensures
that business operations can adapt to changing requirements without disrupting overall operations.
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NetApp offers robust data protection features, including encryption, data backup, and disaster recovery
solutions. These features help the Clerk-Recorder safeguard against unauthorized access, data loss, and
downtime.
The management tools provided by the NetApp allow Clerk-Recorder administrators centralized control and
visibility over the storage infrastructure. This simplifies storage provisioning, monitoring, and troubleshooting,
leading to improved operational efficiency and real time redundancy.
By executing this purchase order, the County is agreeing to defend, indemnify, and hold NetApp harmless for
any claims arising out of its performance under the purchase order agreement.
CONSEQUENCE OF NEGATIVE ACTION:
If this authorization is not approved, the department’s IT team will not have access to technical assistance from
NetApp which can lead to prolonged downtime. The department’s IT team will struggle to address technical
challenges efficiently, leading to delays in resolving issues and potential data loss without the expertise of
NetApp support. With no support, this also means no access to firmware updates, security patches, and software
upgrades, this will leave the NetApp units and all the public records vulnerable to security threats and may
cause compatibility issues with other systems and software. This would increase the risk of extended downtime
and data loss if critical components fail.
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1025 ESCOBAR STREET
MARTINEZ, CA 94553CONTRA COSTA COUNTY
Legislation Details (With Text)
File #: Version:125-360 Name:
Status:Type:Consent Item Passed
File created:In control:1/21/2025 BOARD OF SUPERVISORS
On agenda:Final action:2/4/2025 2/4/2025
Title:APPROVE and AUTHORIZE the Purchasing Agent, on behalf of the Clerk-Recorder, to execute a
purchase order with R-Computer, Inc., in an amount not to exceed $39,606 for the purchase of
computers, servers, software, licensing and warranty coverage. (100% General Fund)
Attachments:
Action ByDate Action ResultVer.Tally
approvedBOARD OF SUPERVISORS2/4/2025 1 Pass
To:Board of Supervisors
From:Kristin Connelly, Clerk-Recorder
Report Title:Click or tap here to enter text.
☒Recommendation of the County Administrator ☐ Recommendation of Board Committee
RECOMMENDATIONS:
APPROVE and AUTHORIZE the Purchasing Agent, on behalf of the Clerk-Recorder, to execute a purchase
order with R-Computer, Inc. in an amount not to exceed $39,606 for the purchase of computer servers,
software, licensing, and warranty coverages.
FISCAL IMPACT:
100% General Fund, this expense will be reimbursed with grant funding and is within the Department’s
operating budget.
BACKGROUND:
The Clerk-Recorder Department is working to implement an updated continuity of operations plan for
responses to contingencies that may interrupt the office’s public services, and requires two new additional
computer servers for the creation of an off-site data back-up system to ensure secure redundancy of
electronically stored information. This purchase, made through R-Computer, Inc., is for two Hewlett Packard
Servers, their warranty protection plan, as well as licensing for virtualization software, provided by VMware
LLC, that is required for securely transferring data to the backup servers.
This purchase includes limitations of liability, capping Hewlett Packard Enterprise’s liability at $100.00 for use
of care pack support services, and capping liability for physical components to the amount payable for support
services, $2,380.
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CONSEQUENCE OF NEGATIVE ACTION:
The Department would lack the appropriate technology to store redundant data at an off-site location.
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1025 ESCOBAR STREET
MARTINEZ, CA 94553CONTRA COSTA COUNTY
Legislation Details (With Text)
File #: Version:125-361 Name:
Status:Type:Consent Item Passed
File created:In control:1/21/2025 BOARD OF SUPERVISORS
On agenda:Final action:2/4/2025 2/4/2025
Title:RECEIVE the 2024-2025 property tax administrative cost recovery report of the Auditor-Controller, FIX
March 11, 2025 at 9:30 a.m.for a public hearing on the determination of property tax administrative
costs, and DIRECT the Clerk of the Board to notify affected local jurisdictions of the public hearing
and to prepare and publish the required legal notice and make supporting documentation available for
public inspection, as recommended by the County Administrator.
Attachments:1. 2024-2025 Property Tax Administration Report.pdf
Action ByDate Action ResultVer.Tally
approvedBOARD OF SUPERVISORS2/4/2025 1 Pass
To:Board of Supervisors
From:Monica Nino, County Administrator
Report Title:Property Tax Administration Cost Recovery
☒Recommendation of the County Administrator ☐ Recommendation of Board Committee
RECOMMENDATIONS:
1.RECEIVE the 2024-25 report of the Auditor-Controller that contains the property tax-related costs of
the Assessor, Tax Collector, Auditor-Controller, and Assessment Appeals Board for the 2023-24 fiscal
year, as required by Resolution No. 97/129;
2.FIX March 11, 2025 at 9:30 a.m. for a public hearing on the determination of the property tax
administration costs;
3.DIRECT the Clerk of the Board to notify affected local jurisdictions of the public hearing; and
4.DIRECT the Clerk of the Board to prepare and publish the required legal notice and make supporting
documentation available for public inspection.
FISCAL IMPACT:
The report details the property tax-related administrative costs of the County in fiscal year 2023-24 to
determine the amount of cost recovery in fiscal year 2024-25. The fiscal year 2023-24 net cost of property tax
administration was $19,363,176. This amounts to approximately 0.51% of all the 2023-24 property taxes
levied countywide. This cost is allocated to each taxing entity in the County based on net revenues of each
entity as a percentage of total revenues. School districts, community college districts, and the County Office of
Education are exempt from cost recovery. As a result, the County absorbs the schools’ share, which this year
amounts to $9,249,285. The net recovery to the County is $7,839,417.
Total cost of property tax administration $19,363,176
Exempt school share of costs -$9,249,285
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County share of costs -$2,274,474
Net recovery to the County $7,839,417
BACKGROUND:
In 1997, the Board of Supervisors adopted Resolution No. 97/129 which provides procedures for property tax
administration cost recovery. The recommended actions are necessary for implementation of Resolution No.
97/129 for the current year.
CONSEQUENCE OF NEGATIVE ACTION:
If the hearing is not set to consider and adopt the finding of property tax costs, the costs cannot be recovered,
resulting in a loss of General Fund revenue in the current fiscal year.
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Legislation Details (With Text)
File #: Version:125-362 Name:
Status:Type:Consent Item Passed
File created:In control:1/7/2025 BOARD OF SUPERVISORS
On agenda:Final action:2/4/2025 2/4/2025
Title:APPROVE amended Conflict of Interest Code for Delta Diablo, including the list of designated
positions, as recommended by County Counsel.
Attachments:1. Exhibit A - Conflict of Interest Code for Delta Diablo, 2. Exhibit B - Conflict of Interest Code for Delta
Diablo - REDLINE
Action ByDate Action ResultVer.Tally
approvedBOARD OF SUPERVISORS2/4/2025 1 Pass
To:Board of Supervisors
From:Thomas L. Geiger, County Counsel
Report Title:Conflict of Interest Code for Delta Diablo
☒Recommendation of the County Administrator ☐ Recommendation of Board Committee
RECOMMENDATIONS:
APPROVE amended Conflict of Interest Code for Delta Diablo, including the list of designated positions.
FISCAL IMPACT:
None.
BACKGROUND:
Delta Diablo has amended its Conflict of Interest Code and submitted the revised code, attached as Exhibit A,
to the Board for approval pursuant to Government Code sections 87306 and 87306.5.
The changes include an updated list of positions designated to file conflict of interest statements, including the
addition of one position. These changes will ensure that the Conflict of Interest Code accurately reflects the
current positions and organizational structure in use by Delta Diablo. A red-lined version of the Conflict of
Interest Code is attached as Exhibit B.
CONSEQUENCE OF NEGATIVE ACTION:
None.
cc:Monica Nino, Clerk of the Board of Supervisors; Kurtis C. Keller, Deputy County Counsel; Vincent De
Lange, General Manager, Delta Diablo
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Legislation Details (With Text)
File #: Version:125-363 Name:
Status:Type:Consent Item Passed
File created:In control:1/23/2025 BOARD OF SUPERVISORS
On agenda:Final action:2/4/2025 2/4/2025
Title:APPROVE and AUTHORIZE the District Attorney, or designee, to execute a contract with Othram, Inc.
in an amount not to exceed $84,200 for forensic genealogy research services when needed to solve
cold cases, for the period February 1, 2025 through September 30, 2027. (100% Federal)
Attachments:
Action ByDate Action ResultVer.Tally
approvedBOARD OF SUPERVISORS2/4/2025 1 Pass
To:Board of Supervisors
From:Diana Becton, District Attorney
Report Title:Request System Terms of Use with Othram, Inc. for DNA Analysis and Genealogy Research for
Cold Cases
☒Recommendation of the County Administrator ☐ Recommendation of Board Committee
RECOMMENDATIONS:
APPROVE and AUTHORIZE the District Attorney, or designee, to execute a contract with Othram, Inc. in an
amount not to exceed $84,200 for DNA analysis and genealogy research for solving cold cases for the period
February 1, 2025 through September 30, 2027.
FISCAL IMPACT:
Approval of this action will result in expenditures of up to $84,200 which is funded 100% by the Federal
Prosecuting Cold Cases Using DNA Grant.
BACKGROUND:
The Contra Costa County District Attorney’s Office received the FY24 Prosecuting Cold Cases Using DNA
grant award from the US Department of Justice, Office of Justice Programs, Bureau of Justice Assistance. The
Grant will fund a contract with Othram, Inc. for Forensic Genetic Genealogy services for solving cold cases.
The Request System Terms of Use Agreement between the District Attorney’s Office and Othram, Inc. will
enable both parties to utilize advanced forensic genetic techniques to assist in solving cold case murders and
other violent crimes. Othram specializes in DNA analysis, including Single Nucleotide Polymorphism (SNP)
profile generation, a capability currently unavailable at the Contra Costa County Crime Lab. This type of
analysis is crucial for solving cold cases, particularly those involving forensic genetic genealogy. The Terms of
Use outlines a financial framework that allows the District Attorney’s Office to collaborate with Othram on
these analyses for cold cases, following an initial review and vetting process by the District Attorney’s Office
and any relevant law enforcement agencies to determine whether such analysis is justified.
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The Request System Terms of Use Agreement with Othram Inc includes indemnification for the County to hold
Othram Inc harmless from any claims arising out of the performance under this agreement.
CONSEQUENCE OF NEGATIVE ACTION:
Without executing the Request System Terms of Use Agreement, the District Attorney’s Office cannot utilize
the Othram system for Forensic Genetic Genealogy services for solving cold cases.
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Legislation Details (With Text)
File #: Version:125-364 Name:
Status:Type:Consent Item Passed
File created:In control:1/24/2025 BOARD OF SUPERVISORS
On agenda:Final action:2/4/2025 2/4/2025
Title:APPROVE clarification of Board action of January 21, 2025 (25-264), which authorized the District
Attorney's Office to execute a contract with General Datatech, L.P., to reflect the correct contract
payment limit of $96,079 instead of $94,125, with no change to the term through January 13, 2026, for
the installation of backup storage to accommodate data growth. (100% General Fund)
Attachments:
Action ByDate Action ResultVer.Tally
approvedBOARD OF SUPERVISORS2/4/2025 1 Pass
To:Board of Supervisors
From:Diana Becton, District Attorney
Report Title:General Datatech User Agreement
☒Recommendation of the County Administrator ☐ Recommendation of Board Committee
RECOMMENDATIONS:
APPROVE clarification of Board action of January 21, 2025 (25-264), which authorized the District Attorney's
Office to execute a contract with General Datatech, L.P., to reflect the correct contract payment limit of $96,079
instead of $94,125, with no change in the term of November 1, 2024 through January 13, 2026, for the
installation of backup storage to accommodate data growth.
FISCAL IMPACT:
Approval of this action will result in expenditures of up to $96,079 which is included in the FY2024-2025
Departmental IT Budget. (100% General Fund)
BACKGROUND:
The appliances and services are needed from General Datatech, L.P. (GDT) to install backup storage solution
and to accommodate storage growth of data and voicemail. The GDT User Agreement includes limitation of
liability and indemnification for the County to hold GDT harmless from any claims arising out of the
performance under this agreement.
On November 5, 2024, the Board of Supervisors approved the District Attorney to execute a User Agreement
with General Datatech, LP in an amount not to exceed $94,125 for the installation of backup storage to
accommodate data growth for the period November 1, 2024 through January 13, 2026. The purpose of this
Board Order is to reflect the correct payment limit as $96,079 instead of $94,125, which includes tax in the
total price.
CONSEQUENCE OF NEGATIVE ACTION:
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If the correction is not approved, the District Attorney’s Office will not be able to execute the user agreement to
reflect the correct payment limit.
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Legislation Details (With Text)
File #: Version:125-365 Name:
Status:Type:Consent Item Passed
File created:In control:12/26/2024 BOARD OF SUPERVISORS
On agenda:Final action:2/4/2025 2/4/2025
Title:APPROVE and AUTHORIZE the Purchasing Agent, or designee, to renew, on behalf of the
Employment and Human Services Director, a Blanket Purchase Order with Sysco Food Services in an
amount not to exceed $1,000,000 for the purchase of food products for the County's Head Start
program for the period January 1, 2025, through December 31, 2027. (60% State, 40% Federal)
Attachments:
Action ByDate Action ResultVer.Tally
approvedBOARD OF SUPERVISORS2/4/2025 1 Pass
To:Board of Supervisors
From:Marla Stuart, Employment and Human Services Director
Report Title:38-012-1 Blanket Purchase Order with Sysco Food Services Renewal
☒Recommendation of the County Administrator ☐ Recommendation of Board Committee
RECOMMENDATIONS:
APPROVE and AUTHORIZE the Purchasing Agent, or designee, to renew on behalf of the Employment and
Human Services Director, the Blanket Purchase Order with Sysco Food Services in an amount not to exceed
$1,000,000 for the period January 1, 2025, through December 31, 2027.
FISCAL IMPACT:
$1,000,000: 60% State and 40% Federal funding, of which $166,667 is budgeted for FY 24-25, $333,333 will
be budgeted for FY 25-26, $333,333 will be budgeted for FY 26-27, and $166,667 will be budgeted for FY 27-
28.
BACKGROUND:
The Employment and Human Services Department (EHSD) has utilized Sysco Food Services since 1998 to
procure food and related products needed for preparing meals and snacks for children enrolled in the County’s
Head Start program, as required by the Head Start Program Performance Standards.
On March 2, 2021, the Board approved item C.38 authorizing the execution of a purchase order with Sysco
Food Services for the period of January 1, 2021, to December 31, 2023. In February 2024, EHSD extended the
purchase order through December 31, 2024. EHSD is now seeking to renew this purchase order with Sysco
Food Services for a term that will conclude on December 31, 2027.
Given failed attempts at a successful RFP in the past, Public Works determined that formal solicitation was not
required and authorized proceeding with the Sysco PO through Sole Source and BOS approval. The Sole
Source details Community Service Bureau’s long-standing relationship with Sysco and why this vendor is
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critical to our daily operations.
Approval of this staff report will allow for the ongoing procurement of high-quality food products essential for
providing nutritious meals to children enrolled in the County’s Head Start program.
CONSEQUENCE OF NEGATIVE ACTION:
Should the proposed action not be approved by the Board of Supervisors, the County will not be in compliance
with the Head Start Program Performance Standards.
CHILDREN’S IMPACT STATEMENT:
This staff report supports three of the community outcomes established in the Children’s Report Card: (1)
“Children Ready for and Succeeding in School” (3) “Families that are Economically Self-sufficient” and (4)
Families that are Safe, Stable, and nurturing” by offering comprehensive services, including high quality early
childhood education, nutrition, and health services to low-income children throughout Contra Costa County.
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Legislation Details (With Text)
File #: Version:125-390 Name:
Status:Type:Consent Item Passed
File created:In control:12/18/2024 BOARD OF SUPERVISORS
On agenda:Final action:2/4/2025 2/4/2025
Title:ADOPT Ordinance No. 2025-03, amending the County’s mobile vendor regulations related to
authorized hours and locations of operation, vending near certain specified uses, and vending within
the public right-of-way to ensure public safety and prevent traffic hazards. (100% Environmental
Health Fees)
Attachments:1. Ordinance No. 2025-03 Mobile Vendor Regulations, 2. Signed Ordinance No. 2025-03.pdf
Action ByDate Action ResultVer.Tally
approvedBOARD OF SUPERVISORS2/4/2025 1 Pass
To:Board of Supervisors
From:Anna Roth, Health Services Director
Report Title:Adopt Ordinance No. 2025-03 Mobile Vendor Regulations
☒Recommendation of the County Administrator ☐ Recommendation of Board Committee
RECOMMENDATIONS:
ADOPT Ordinance No. 2025-03, amending the County’s mobile vendor regulations related to authorized hours
and locations of operation, vending near certain specified uses, and vending within the public right-of-way to
ensure public safety and prevent traffic hazards.
FISCAL IMPACT:
There is no impact to the General Fund as a result of this ordinance. The Contra Costa Health Services
Department, Environmental Health Division (EHD) is fully fee supported and verified enforcement actions
would follow cost recovery procedures adopted by the Board in Resolution No. 2019/521.
BACKGROUND:
Due to feedback from the community and mobile vendors, staff recommends the following changes to Contra
Costa County Ordinance Code Article 413-3.16 - Mobile Vendor Regulations:
1.Site defined as the footprint occupied by the mobile unit and the area within 100 feet of the occupied
footprint; and
2.Max duration for vending at a single site revised to 3 hours per day per site; and
3.Restricted hours of operations to no vending during 10:00 pm to 6:30 am; and
4.Restricted distance for mobile vendors from community events, certified farmers’ markets, or swap
meet set to 100 feet.
Defining a site as 100 feet of the occupied food print will remove the ambiguity from the existing County
Ordinance standard of maximum duration per day, per site for mobile vendors providing more clarity regarding
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their daily operations. Additionally, it will provide staff improved clarity for potential enforcement actions
when necessary in unincorporated areas of the county.
To ensure food safety and sanitation standards are adequately met, staff recommends extending the maximum
daily hour duration for mobile units at each site. This additional time will allow for thorough food and contact
surface preparation, proper temperature control, and effective cleanup and trash disposal, thereby enhancing
both food safety and overall environmental sanitation. The maximum duration per day, per site in the current
ordinance is different for motorized and non-motorized mobile units which has caused confusion and is overly
restrictive based on feedback staff has received from mobile vendors when evaluating the proposed
modifications. The EHD recommends the maximum duration per day, per site apply to all mobile units
regardless of motor status and be increased to three hours per day, per site to afford the mobile vendors a more
reasonable time to vend in addition to making the ordinance easier for all types of mobile vendors to
understand.
Staff surveyed other environmental health jurisdictions statewide and found no consistency with operational
hours or health code requirements. Therefore, staff recommends modifying the hours of operation from the
current restriction of no vending during 8:00 pm through 6:30 am to a revised restriction of no vending during
10:00 pm through 6:30 am, the following day. This recommendation is based on feedback from mobile vendors,
who have indicated the current hours are too restrictive. The proposed adjustment would provide vendors with
additional operational time, thereby enhancing their ability to conduct business.
The EHD has received complaints from community members and event operators over time regarding mobile
vendors not affiliated with a designated community event, certified farmers’ market, or swap meet encroaching
on the space occupied by the event. This presents a potential food safety hazard since the vendors participating
in the designated events are permitted and inspected by the EHD whereas that may not be necessarily the case
for mobile vendors encroaching on an event. There is not a current statewide standard for the distance an
unaffiliated mobile vendor has to be from a designated event. Staff have consulted with the Bay Area Mobile
Food Facility Roundtable composed of representatives from environmental health agencies throughout the San
Francisco Bay Area and determined that there is not an overwhelming consensus amongst jurisdictions in the
Bay Area either. Therefore, staff recommends the distance between unaffiliated mobile vendors and a
designated community event, certified farmers’ market, or swap meet to be 100 feet to align with local
municipal code, such as the City of Richmond’s recently adopted sidewalk vending ordinance. This provides
consistency between city municipal code and County ordinance code, where applicable, for vendors traveling
between incorporated and unincorporated areas.
CONSEQUENCE OF NEGATIVE ACTION:
If this action is not approved, the Ordinance will not be formally adopted, and the existing County Ordinance
Code will remain without modification.
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Legislation Details (With Text)
File #: Version:125-391 Name:
Status:Type:Consent Item Passed
File created:In control:1/21/2025 BOARD OF SUPERVISORS
On agenda:Final action:2/4/2025 2/4/2025
Title:APPROVE and AUTHORIZE the Health Services Director, or designee, to execute a contract
amendment with Telemedicine Group P.C. (dba TeleMed2U), to increase the payment limit by
$1,500,000 to an amount not to exceed $3,300,000 to provide additional behavioral health and
medical psychiatric telehealth services to Contra Costa Health Plan members with no change in the
term ending December 31, 2025. (100% Contra Costa Health Plan Enterprise Fund II)
Attachments:
Action ByDate Action ResultVer.Tally
approvedBOARD OF SUPERVISORS2/4/2025 1 Pass
To:Board of Supervisors
From:Anna Roth, Health Services Director
Report Title:Contract Amendment #77-421-2 with Telemedicine Group P.C. (dba TeleMed2U)
☒Recommendation of the County Administrator ☐ Recommendation of Board Committee
RECOMMENDATIONS:
APPROVE and AUTHORIZE the Health Services Director, or designee, to execute on behalf of the County
Contract Amendment Agreement #77-421-2 with Telemedicine Group P.C. (dba TeleMed2U), a corporation,
effective February 1, 2025, to amend Contract # 77-421-1, to increase the payment limit by $1,500,000 from
$1,800,000 to a new payment limit of $3,300,000 for additional behavioral health and medical psychiatric
telehealth services with no change in the term of January 1, 2023 through December 31, 2025.
FISCAL IMPACT:
Approval of this Amendment will result in additional expenditures of up to $1,500,000 and will be funded
100% by Contra Costa Health Plan (CCHP) Enterprise Fund II revenues. (No rate increase)
BACKGROUND:
CCHP has an obligation to provide certain specialized behavioral health services for its members under the
terms of their Individual and Group Health Plan membership Contracts with the County. Services for
behavioral health and medical psychiatric telehealth services include electronic video and communication
technologies to facilitate outpatient therapy services including diagnosis, consultation, treatment, medication
management, education, and care management services for CCHP members. This Contractor has been a part of
the CCHP Provider Network providing these services and fostering a deep understanding of the CCHP
organizations mission, values, and long-term objectives since January 1, 2022. This Contract is entered into
under and subject to the following legal authorities: California Government Code §§ 26227 and 31000; Health
and Safety Code § 1451. Health Services Personnel approved this contract to ensure no conflicts with labor
relations. Contractor currently cooperates with and participates in CCHP’s Quality Management Program
which consists of quality improvement activities to improve the quality of care and services and member
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experience. Cooperation includes collection and evaluation of performance measurement data and participation
in the organization’s clinical and service measure Quality Improvement Programs.
On December 6, 2022, the Board of Supervisors approved Contract #77-421-1 with Telemedicine Group P.C.
(dba TeleMed2U) in the amount of $1,800,000 for the provision of behavioral health and medical psychiatric
telehealth services for CCHP members for the period January 1, 2023 through December 31, 2025.
Approval of Contract Amendment Agreement #77-421-2 will allow the Contractor to provide additional
behavioral health and medical psychiatric telehealth services for CCHP members through December 31, 2025.
CONSEQUENCE OF NEGATIVE ACTION:
If this Amendment is not approved, the Contract will not have sufficient funds to pay Contractor and CCHP
members will not have access to Contractor’s additional behavioral health and medical psychiatric telehealth
services under the terms of their Individual and Group Health Plan Memberships.
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Legislation Details (With Text)
File #: Version:125-392 Name:
Status:Type:Consent Item Passed
File created:In control:1/23/2025 BOARD OF SUPERVISORS
On agenda:Final action:2/4/2025 2/4/2025
Title:APPROVE and AUTHORIZE the Health Services Director, or designee, to execute a contract with the
City of Pittsburg, in an amount not to exceed $543,131 to provide outreach services to residents who
have serious and persistent mental illness and multiple encounters with police under the Mental
Health Evaluation Team Program for the period July 1, 2024 through June 30, 2027. (100% Assembly
Bill 109 funds)
Attachments:
Action ByDate Action ResultVer.Tally
approvedBOARD OF SUPERVISORS2/4/2025 1 Pass
To:Board of Supervisors
From:Anna Roth, Health Services Director
Report Title:Interagency Agreement #74-664-2 with City of Pittsburg
☒Recommendation of the County Administrator ☐ Recommendation of Board Committee
RECOMMENDATIONS:
APPROVE and AUTHORIZE the Health Services Director, or designee, to execute on behalf of the County
Interagency Agreement #74-664-2 with City of Pittsburg, a government agency, in an amount not to exceed
$543,131 to provide outreach services to residents of Pittsburg diagnosed with a serious and persistent mental
illness (SPMI) and who have a history of multiple contacts with law enforcement, attempts or acts of physical
aggression during encounters with law enforcement or others, domestic violence, firearm use or possession,
and/or multiple visits to Psychiatric Emergency Services (PES) for the Mental Health Evaluation Team
(MHET) Program, for the period July 1, 2024 through June 30, 2027.
FISCAL IMPACT:
Approval of this Contract will result in contractual service expenditures of up to $543,131 over a three-year
period and will be funded 100% by Assembly Bill 109 funds.
BACKGROUND:
The purpose of this Interagency Agreement is for Contra Costa County’s Health Services (CCHS) to take over
administration of this agreement from the County’s Probation Department. City of Pittsburg and County have
formed a joint outreach program “MHET Program” which focuses on the needs of residents with SPMI by
providing joint welfare checks, clinical assessments with recommendations, case management and linkage to
appropriate and available community mental health services, which will result in a reduction in the number of
physically aggressive and/or negative interactions between residents with SPMI and law enforcement; a
reduction in the number of repeat calls for service; a reduction in the number of avoidable visits to PES; a safer,
better quality of life for the resident, their family members, and the community at large; and a significant cost
savings should be realized by City of Pittsburg and County agencies from a reduction in the time and resources
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spent to manage this population safely and effectively.
On September 19, 2023, the Board of Supervisors approved Interagency Agreement 74-664-1 with the City of
Pittsburg, in an amount of $164,082 for the provision of outreach services for residents experiencing mental
health crisis, for the period July 1, 2023 through June 30, 2024.
Approval of Interagency Agreement #74-664-2, Contractor will provide outreach services for the MHET
Program through June 30, 2027. This Agreement includes mutual indemnification to hold all parties harmless
for any claims arising from the performance under this Agreement. This Agreement is retroactive due to delays
in requesting and receiving the budget and contracting documents from City of Pittsburg.
CONSEQUENCE OF NEGATIVE ACTION:
If this Interagency Agreement is not approved, County will not have the necessary resources for the MHET
program and residents with SPMI will not receive additional outreach efforts to access mental health services.
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Legislation Details (With Text)
File #: Version:125-393 Name:
Status:Type:Consent Item Passed
File created:In control:1/23/2025 BOARD OF SUPERVISORS
On agenda:Final action:2/4/2025 2/4/2025
Title:APPROVE and AUTHORIZE the Health Services Director, or designee, to execute a contract with
Signature Parking, LLC, in an amount not to exceed $500,000 to provide parking management
services for Contra Costa Regional Medical Center for the period January 1, 2025 through December
31, 2025. (100% Hospital Enterprise Fund I)
Attachments:
Action ByDate Action ResultVer.Tally
approvedBOARD OF SUPERVISORS2/4/2025 1 Pass
To:Board of Supervisors
From:Anna Roth, Health Services Director
Report Title:Contract #76-575-9 with Signature Parking, LLC
☒Recommendation of the County Administrator ☐ Recommendation of Board Committee
RECOMMENDATIONS:
APPROVE and AUTHORIZE the Health Services Director,or designee,to execute on behalf of the County
Contract #76-575-9 with Signature Parking,LLC,a limited liability company,in an amount not to exceed
$500,000,to provide parking management services for Contra Costa Regional Medical Center (CCRMC),for
the period January 1, 2025 through December 31, 2025.
FISCAL IMPACT:
Approval of this Contract will result in annual budgeted expenditures of up to $500,000 and will be funded
100% by Hospital Enterprise Fund I.
BACKGROUND:
The County has been contracting with Signature Parking,LLC since January 2017 to provide parking
management services for CCRMC.The Contractor provides all of the elements necessary for a well-organized
and professional operation.They will assist in patient care with assisting patients to continue to attend medical
appointments at CCRMC.Removing the barriers caused by parking will eliminate patients in missing
appointments due to lack of parking and essentially elevating patient care.
This Contract is entered into under and subject to the following legal authorities:California Government Code
§§26227 and 31000.This Contract was approved by Health Services Personnel to ensure there is no conflict
with labor relations.CCRMC’s Quality Management,Utilization Management and Contract Monitor Staff meet
on a regular basis to ensure monitoring and performance measures in the Contract are upheld.This Contractor
was approved by the Public Works Department’s Purchasing Division on December 16, 2024.
On December 6,2022,the Board of Supervisors approved Contract #76-575-8 with Signature Parking,LLC,in
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On December 6,2022,the Board of Supervisors approved Contract #76-575-8 with Signature Parking,LLC,in
an amount not to exceed $738,056,to provide parking management services at CCRMC,for the period January
1, 2023 through December 31, 2024.
Approval of Contract #76-575-9 will allow the Contractor to continue providing parking management services
for CCRMC through December 31,2025.The delay of the contract was due to ongoing negotiations between
the Contractor and Department.
CONSEQUENCE OF NEGATIVE ACTION:
If this Contract is not approved,patients at CCRMC will continue to miss medical appointments due to lack of
parking.
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Legislation Details (With Text)
File #: Version:125-394 Name:
Status:Type:Consent Item Passed
File created:In control:12/17/2024 BOARD OF SUPERVISORS
On agenda:Final action:2/4/2025 2/4/2025
Title:APPROVE and AUTHORIZE the Purchasing Agent, or designee, to execute on behalf of the Health
Services Director, 1) a purchase order with Meridian Leasing Corporation ("Meridian") in an amount
not to exceed $116,240 to lease Omnicell automated dispensing cabinets at the Contra Costa
Regional Medical Center Youth Stabilization Unit and Infusion Clinic and reimburse Meridian for
personal property taxes, 2) a Supplemental to the Master Lease Agreement with Meridian to provide
two automated dispensing cabinets for the period April 1, 2025 through March 31, 2030. (100%
Hospital Enterprise Fund I)
Attachments:
Action ByDate Action ResultVer.Tally
approvedBOARD OF SUPERVISORS2/4/2025 1 Pass
To:Board of Supervisors
From:Anna Roth, Health Services Director
Report Title:Purchase Order with Meridian Leasing Corporation
☒Recommendation of the County Administrator ☐ Recommendation of Board Committee
RECOMMENDATIONS:
APPROVE and AUTHORIZE the Purchasing Agent, or designee, to execute on behalf of the Health Services
Director, 1) a purchase order with Meridian Leasing Corporation ("Meridian") in an amount not to exceed
$116,240 to lease Omnicell automated dispensing cabinets for the Contra Costa Regional Medical Center Youth
Stabilization Unit and Infusion Clinic and reimburse Meridian for personal property taxes, 2) a Supplemental to
the Master Lease Agreement with Meridian to provide two automated dispensing cabinets for the period April
1, 2025 through March 31, 2030.
FISCAL IMPACT:
Approval of this action will result in expenditure of up to $116,240 over a five-year period and will be funded
by Hospital Enterprise Fund I revenues.
BACKGROUND:
Contra Costa Regional Medical Center (CCRMC) has used Omnicell since 2005 at the CCRMC Inpatient
Pharmacy, select clinics and detention facilities. These automated dispensing cabinets (ADC) interface with the
pharmacy information system (EPIC). CCRMC will be leasing the Omnicell equipment through Meridian
Leasing Corporation. The pharmacies have been satisfied with Meridian Leasing Corporation and wish to
continue the working relationship with this company. This purchase will be made via sole source justification,
for product and service continuity.
On May 12, 2020, the Board of Supervisors approved item C.64 to execute a master lease agreement and lease
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supplement with Meridian Leasing Corporation, in an amount not to exceed $3,382,011, for the lease of the
Omnicell automated dispensing cabinets at CCRMC and Health Centers for the period from September 1, 2020
through August 31, 2027, subject to approval by the County Administrator and approval as to form by County
Counsel.
The Master Lease Agreement includes agreeing to limitation of liability and to indemnify, defend, and hold
harmless Meridian Leasing Corporation. Approval of this request will allow Meridian Leasing Corporation to
provide ADCs to the Youth Stabilization Unit and Infusion Clinic.
CONSEQUENCE OF NEGATIVE ACTION:
If this action is not approved, these locations will lack safe and effective medication storage and a distribution
system which could result in unsafe medication practices, potential costly regulatory citations or patient harm.
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1025 ESCOBAR STREET
MARTINEZ, CA 94553CONTRA COSTA COUNTY
Legislation Details (With Text)
File #: Version:125-395 Name:
Status:Type:Consent Item Passed
File created:In control:11/27/2024 BOARD OF SUPERVISORS
On agenda:Final action:2/4/2025 2/4/2025
Title:APPROVE and AUTHORIZE the Purchasing Agent, or designee, to purchase on behalf of the Health
Services Director, up to 100 Walmart vouchers, 50 Albertson's grocery vouchers, and 500 Bart Clipper
Cards plus processing fees of up to $1,500 totaling an amount not to exceed $17,500 for unemployed,
unhoused clients reentering the community from detention with substance use disorders participating
in the Crossroads Program at the West County, Martinez or Marsh Creek Detention Facilities during
the period February 1, 2025 through January 31, 2026. (100% Board of State and Community
Corrections Residential Substance Abuse Treatment funds)
Attachments:
Action ByDate Action ResultVer.Tally
approvedBOARD OF SUPERVISORS2/4/2025 1 Pass
To:Board of Supervisors
From:Anna Roth, Health Services Director
Report Title:Vouchers for Clients Transitioning from Detention Participating in Crossroads Program
☒Recommendation of the County Administrator ☐ Recommendation of Board Committee
RECOMMENDATIONS:
APPROVE AND AUTHORIZE the Purchasing Agent, or designee, to purchase on behalf of the Health
Services Director, up to 100 Walmart vouchers each with a $40 value totaling $4,000; 50 Albertson’s grocery
vouchers each with a $40 value totaling $2,000; and 500 BART Clipper Card transportation vouchers each with
a $20 value plus processing fees of up to $1,500 totaling $11,500; for a total amount not to exceed $17,500 for
unemployed unhoused clients reentering the community from detention with substance use disorders (SUD)
participating in the Crossroads Program at the West County, Martinez or Marsh Creek Detention Facilities
during the period from February 1, 2025 through January 31, 2026.
FISCAL IMPACT:
This $17,500 expenditure will be funded by The Board of State and Community Corrections (BSCC)
Residential Substance Abuse Treatment (RSAT) Grant Award fund. No County General Funds are required.
BACKGROUND:
Alcohol and Other Drug Services (AODS) within the Behavioral Health Division received a RSAT grant award
for persons choosing to enroll in intensive SUD treatment at detention facilities. The program locally known as
Crossroads, includes SUD treatment post release. Once the clients reenter the community, they continue to be
actively enrolled in SUD Treatment, Recovery Coaching, and Recovery Residences. The provision of nutritious
food is essential to well-being and promotes better health outcomes for clients. Additionally, providing non-
medical related transportation services through vouchers enables clients to seek employment, attend job
interviews, participate in pro-social recreational activities/events, and other recovery-oriented services,
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including the purchase of items they may need as they become productive members in the community such as
work boots. All vouchers are distributed based on need as well as eligibility requirements outlined by the RSAT
grant and BSCC.
AODS’ Crossroads program is fully funded via a grant award for $1,500,000 beginning July 1, 2024, through
June 30, 2027. There are no fees or additional costs for Walmart or Albertsons. The Metropolitan Transportation
Commission charges a $3 fee per Clipper card, but the program may be eligible for a waiver of this fee.
Approval of this action will enable the program to meet grant requirements.
CONSEQUENCE OF NEGATIVE ACTION:
If this action is not approved, AODS would not fulfill the goals outlined in RSAT Grant, the health and well-
being of the clients enrolled in the program would be impacted and they will be poorly prepared to assume
employment responsibilities.
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Legislation Details (With Text)
File #: Version:125-396 Name:
Status:Type:Consent Item Passed
File created:In control:1/3/2025 BOARD OF SUPERVISORS
On agenda:Final action:2/4/2025 2/4/2025
Title:APPROVE and AUTHORIZE the Purchasing Agent, or designee, on behalf of the Health Services
Director, to execute a purchase order amendment with Forward Advantage Holdings, Inc, to extend
the term through October 29, 2025, with no change to the original payment limit of $659,833 for the
purchase of Imprivata single sign-on and multi-factor authentication software, and iGel network
software. (100% Hospital Enterprise Fund I)
Attachments:
Action ByDate Action ResultVer.Tally
approvedBOARD OF SUPERVISORS2/4/2025 1 Pass
To:Board of Supervisors
From:Anna Roth, Health Services Director
Report Title:Amendment to Purchase Order with Forward Advantage Holdings, Inc
☒Recommendation of the County Administrator ☐ Recommendation of Board Committee
RECOMMENDATIONS:
APPROVE and AUTHORIZE the Purchasing Agent, or designee, on behalf of the Health Services Director, to
execute an amendment to purchase order #26608 with Forward Advantage Holdings, Inc, to extend the term
through October 29, 2025, with no change to the original payment limit of $659,833 for the purchase of
Imprivata single sign-on and multi-factor authentication software, and iGel network software.
FISCAL IMPACT:
Approval of this action will result in expenditures of up to $659,833 through October 29, 2025 and is funded by
the Hospital Enterprise Fund I revenues.
BACKGROUND:
Forward Advantage is the authorized reseller of Imprivata, Inc. single sign-on (SSO) software and Confirm ID
software. Imprivata SSO Software meets the needs of Contra Costa Health (CCH) by offering a solution that
addresses access challenges. This sign-on solution significantly reduces the number of clicks required to log on
to various systems and eliminates the need to remember or enter application usernames and passwords.
Forward Advantage is also the authorized reseller of the iGel Workspace Edition Solution which serves as a
troubleshooting service within the County’s environment. IGEL Workspace Edition OS 11 is a foundation for
secure endpoint control over cloud workspaces.
On December 14, 2021, the Board of Supervisors approved item C.76 to execute purchase order #26608 with
Forward Advantage, Inc., for the renewal of Imprivata SSO Software and Confirm ID software for electronic
prescribing of controlled substances, and iGel Workspace software, for the period from December 14, 2021
through February 7, 2025.
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Approval of this action will allow CCH to purchase additional Imprivata SSO Software, Confirm ID software
and iGel Workspace software services through October 29, 2025. On January 8, 2025 the Purchasing Agent
approved the continued use of Forward Advantage Holdings, Inc.
CONSEQUENCE OF NEGATIVE ACTION:
If this action is not approved, the purchase order will expire and CCH will lose the ability to purchase
Imprivata’s SSO Software, Confirm ID, and iGel’s Workspace Edition Solution as the need for them arise.
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Legislation Details (With Text)
File #: Version:125-397 Name:
Status:Type:Consent Item Passed
File created:In control:1/16/2025 BOARD OF SUPERVISORS
On agenda:Final action:2/4/2025 2/4/2025
Title:APPROVE and AUTHORIZE the Purchasing Agent, or designee, to execute on behalf of the Health
Services Director, a purchase order with Trace3, LLC in an amount not to exceed $569,997 for Cisco
network switches, and a Cisco letter agreement with Cisco Systems, Inc. for server support services
for the period of December 15, 2024 through December 14, 2027. (100% Hospital Enterprise Fund I)
Attachments:
Action ByDate Action ResultVer.Tally
approvedBOARD OF SUPERVISORS2/4/2025 1 Pass
To:Board of Supervisors
From:Anna Roth, Health Services Director
Report Title:Purchase Order with Trace3, LLC
☒Recommendation of the County Administrator ☐ Recommendation of Board Committee
RECOMMENDATIONS:
APPROVE and AUTHORIZE the Purchasing Agent, or designee, to execute on behalf of the Health Services
Director, (1) a purchase order with Trace3, LLC in an amount not to exceed $569,997 for Cisco network
switches, and (2) a Cisco letter agreement with Cisco Systems, Inc. for server support services for the period of
December 15, 2024 through December 14, 2027.
FISCAL IMPACT:
This action will result in expenditures of up to $569,997 over a 3-year period and will be funded by Hospital
Enterprise Fund I revenues.
BACKGROUND:
Cisco Application Centric Infrastructure (ACI) is a software-defined networking (SDN) solution designed to
simplify and automate network management in data centers. It uses a policy-driven approach to manage and
control the network, allowing for greater agility and scalability. It helps keep the network organized, secure,
and efficient. In addition, the ACI architecture allows for faster convergence and better failover of endpoints.
Contra Costa Health (CCH) is purchasing various Cisco ACI switches for its Pittsburg Data Center. These
switches are nearing the end of their support period and require replacement. The most critical applications and
servers in CCH currently plug in to these ACI switches.
CCH IT received a request to execute a new agreement from the stakeholder on July 8, 2024 to replace the
previous agreement, however, delays were encountered due to staff transitions. CCH IT is actively
collaborating with the vendor and stakeholders to submit renewal requests at least 180 days in advance of
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expiration to prevent future delays.
A Request for Proposal (RFP) was conducted to solicit bids for these Cisco ACI switch replacements. After a
thorough evaluation Trace3 was selected as the preferred vendor under BID #CCC2024-HSD-2 on September
18, 2024. Trace3 is a reseller of Cisco products. Trace3 has been providing hardware and related software
products to CCH since 2021.
CONSEQUENCE OF NEGATIVE ACTION:
Failure to approve this purchase would place significant functionality loss across server locations. The failure
of servers would have far-reaching effects that can compromise the entire network's functionality, security, and
compliance, ultimately affecting CCH’s operations and reputation.
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Legislation Details (With Text)
File #: Version:125-366 Name:
Status:Type:Consent Item Passed
File created:In control:1/22/2025 BOARD OF SUPERVISORS
On agenda:Final action:2/4/2025 2/4/2025
Title:APPROVE and AUTHORIZE the Chief Information Officer, or designee, to execute a Motorola
Solutions Customer Agreement with Motorola, Inc. to provide access for the County, and other state
or local government agencies that use the East Bay Regional Communications System Authority
System, to purchase products and services under the terms and pricing of the Agreement for the term
of February 1, 2025, through January 31, 2030. (No fiscal impact)
Attachments:
Action ByDate Action ResultVer.Tally
approvedBOARD OF SUPERVISORS2/4/2025 1 Pass
To:Board of Supervisors
From:Marc Shorr, Information Technology Director
Report Title:Motorola Solutions Customer Agreement on behalf of EBRCS Purchasers
☒Recommendation of the County Administrator ☐ Recommendation of Board Committee
RECOMMENDATIONS:
APPROVE and AUTHORIZE the Chief Information Officer, or designee, to execute a Motorola Solutions
Customer Agreement with Motorola, Inc. to provide access for the County, and other state or local government
agencies that use the East Bay Regional Communications System Authority System, to purchase products and
services under the terms and pricing of the Agreement for the term of February 1, 2025, through January 31,
2030.
FISCAL IMPACT:
There is no fiscal impact for this action.
BACKGROUND:
The County originally executed a Communications Systems Agreement (CSA) with Motorola, Inc. for the
purchase and installation of Motorola P25 radio hardware in May of 2009. That agreement was extended and/or
amended until May 2024 when both parties agreed to let it terminate. The Motorola Solutions Customer
Agreement (MCA), which the Department is asking this Board to approve now, is an updated agreement that
both parties have negotiated and is effective for five (5) years.
This Agreement allows the right for other agencies that use the East Bay Regional Communications System
Authority (EBRCSA) System (“Eligible Purchasers”) the ability to purchase equipment, software or other
services under the terms and conditions of this Agreement, with the same rights and responsibilities as specified
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in this Agreement. Each Eligible Purchaser may execute an individual contract with Motorola or issue a
purchase order referencing the MCA for receiving and accepting the subject Products and Services and for
directly paying Motorola. The County assumes no responsibility or liability for any such contracts entered into
by other governmental agencies.
The MCA includes a limitation of liability provision that limits its liability to the amount paid for any Ordering
Document in the preceding twelve (12) month period and requires the County to defend, indemnify and hold
Motorola harmless for any claims arising out of its performance under this Agreement.
CONSEQUENCE OF NEGATIVE ACTION:
If this is not approved, the County and other state or local government agencies that use the EBRCSA will not
be afforded the discounted pricing offered under this Agreement.
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MARTINEZ, CA 94553CONTRA COSTA COUNTY
Legislation Details (With Text)
File #: Version:125-367 Name:
Status:Type:Consent Item Passed
File created:In control:1/23/2025 BOARD OF SUPERVISORS
On agenda:Final action:2/4/2025 2/4/2025
Title:APPROVE and AUTHORIZE the Purchasing Agent, on behalf of the Chief Information Officer, to
execute a purchase order, with Computacenter United States, Inc., in an amount not to exceed
$380,000 for the purchase of Rubrik Security Cloud hardware, licensing and support for the period of
February 4, 2025, through February 3, 2026. (100% User Departments)
Attachments:
Action ByDate Action ResultVer.Tally
approvedBOARD OF SUPERVISORS2/4/2025 1 Pass
To:Board of Supervisors
From:Marc Shorr, Information Technology Director
Report Title:Purchase Order with Computacenter United States Inc.
☒Recommendation of the County Administrator ☐ Recommendation of Board Committee
RECOMMENDATIONS:
APPROVE and AUTHORIZE the Purchasing Agent, on behalf of the Chief Information Officer, to execute a
purchase order, with Computacenter United States, Inc., in an amount not to exceed $380,000 for the purchase
of Rubrik Security Cloud hardware, licensing and support for the period of February 4, 2025, through February
3, 2026.
FISCAL IMPACT:
The cost of this purchase will be covered within the Department’s budget for FY 24/25. 100% User
Departments.
BACKGROUND:
The Department of Information Technology (DOIT) Network Services team has identified 45 network servers
that are outdated and no longer under maintenance or support, with ages ranging from 5 to over 10 years old.
These servers are crucial for the County and various departments, but replacement parts and firmware upgrades
are unavailable. Failure or compromise of these servers could cause significant outages. DOIT recommends
replacing them with a Private Cloud infrastructure to consolidate and enhance the server environment,
extending the lifecycle and reducing the risk of hardware failures.
As part of the Enterprise Private Cloud project, Rubrik hardware will serve as a high-performance backup and
data management appliance, ensuring robust data protection, archival, and recovery. With Rubrik Security
Cloud licensing, the solution extends to include ransomware detection and remediation, immutable backups to
safeguard against tampering, data governance for compliance and insights, and cloud archival for flexible
storage. The system integrates seamlessly with Cisco UCS, ensuring security, compliance, and proactive threat
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detection. Together, Cisco UCS and Rubrik provide unified management, scalability, enhanced security, and
streamlined compliance, creating a secure, efficient, and scalable private cloud infrastructure.
This project will enable the County to provide a true enterprise platform for all County departments to utilize at
a lower cost than replacing existing like for like server hardware. The result of which will provide an increased
level of stability, reliability, enhanced data protection with data replication that minimizes the risk of data loss,
uniform practice in server deployment, patching and maintenance. This will also reduce the amount of labor
effort required to provision server/storage resources.
This purchase is subject to the terms and conditions of the November 23, 2023 Master Products and Services
Agreement between the County and Computacenter, which includes both an indemnification provision from the
County to Computacenter and a limitation of liability capping damaged at the greater of the amount of fees paid
in the twelve (12) month prior to the event giving rise to the claim or $100,000. The purchase is also subject to
the terms and conditions of February 13, 2020, End User License Agreement between the County and Rubrik
which contains limitation of liability capping damages at the amount of fees paid in the twelve (12) months
prior to the event giving rise to the claim. This purchase is being justified via sole source.
CONSEQUENCE OF NEGATIVE ACTION:
The County departments supported by DoIT will be at risk of not meeting standards for security, performance,
reliability, and cost effectiveness. Additionally, the Rubrik products improve the County’s ability to protect and
recover its intellectual assets in the event of a cyber-attack.
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MARTINEZ, CA 94553CONTRA COSTA COUNTY
Legislation Details (With Text)
File #: Version:125-368 Name:
Status:Type:Consent Item Passed
File created:In control:1/15/2025 BOARD OF SUPERVISORS
On agenda:Final action:2/4/2025 2/4/2025
Title:APPROVE and AUTHORIZE the Purchasing Agent to execute, on behalf of the County Librarian, a
purchase order with Califa Group in an amount not to exceed $6,038 for the renewal of Quipu Group
LLC’s eRenew subscription through Califa Group, for the period March 1, 2025, through February 28,
2026. (100% Library Fund)
Attachments:
Action ByDate Action ResultVer.Tally
approvedBOARD OF SUPERVISORS2/4/2025 1 Pass
To:Board of Supervisors
From:Alison McKee, County Librarian
Report Title:Purchase Order with Califa Group for Quipu Group, LLC’s eRenew subscription through
February 28, 2026
☒Recommendation of the County Administrator ☐ Recommendation of Board Committee
RECOMMENDATIONS:
APPROVE and AUTHORIZE the Purchasing Agent to execute, on behalf of the County Librarian, a purchase
order with Califa Group in an amount not to exceed $6,038 for the renewal of Quipu Group LLC’s eRenew
subscription, subject to the terms of The Quipu Group’s Hosted Services Agreement, for the period March 1,
2025, through February 28, 2026.
FISCAL IMPACT:
100% Library Fund.
BACKGROUND:
The Library Department has used and continues to use eRenew, from The Quipu Group LLC. which provides
address and name verification processes for online library card renewals.
Quipu’s Hosted Services Agreement includes an indemnification from the County to Quipu and a limitation of
liability to the amount of fees paid.
CONSEQUENCE OF NEGATIVE ACTION:
If the Purchase Order is not approved, the Contra Costa County Library will not be able to provide an easily
accessible way for patrons to renew their library accounts. Patrons will need to physically come to the library
branch to renew their expired cards.
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Legislation Details (With Text)
File #: Version:125-369 Name:
Status:Type:Consent Item Passed
File created:In control:1/29/2025 BOARD OF SUPERVISORS
On agenda:Final action:2/4/2025 2/4/2025
Title:APPROVE and AUTHORIZE the County Librarian, or designee, to close the Prewett Library in Antioch
on Wednesday, February 12, 2025, to coincide with the holiday closure of the Antioch Community
Center to observe Abraham Lincoln’s Birthday. (No fiscal impact)
Attachments:
Action ByDate Action ResultVer.Tally
approvedBOARD OF SUPERVISORS2/4/2025 1 Pass
To:Board of Supervisors
From:Alison McKee, County Librarian
Report Title:Close Prewett Library in Antioch on Wednesday, February 12, 2025, to coincide with the
holiday closure of the Antioch Community Center to observe Abraham Lincoln’s Birthday.
☒Recommendation of the County Administrator ☐ Recommendation of Board Committee
RECOMMENDATIONS:
APPROVE and AUTHORIZE the County Librarian, or designee, to close the Prewett Library in Antioch on
Wednesday, February 12, 2025, to coincide with the holiday closure of the Antioch Community Center to
observe Abraham Lincoln’s Birthday. The Library was informed about the closure by the City of Antioch on
January 28, 2025.
FISCAL IMPACT:
None
BACKGROUND:
The Antioch Community Center, where the Prewett Library is located, February 12, 2025, to coincide with the
holiday closure of the Antioch Community Center to observe Abraham Lincoln’s Birthday. Permanent staff will
be given the option to work elsewhere in the Library system or to use paid leave accruals during the closure
CONSEQUENCE OF NEGATIVE ACTION:
Unknown
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Legislation Details (With Text)
File #: Version:125-370 Name:
Status:Type:Consent Item Agenda Ready
File created:In control:1/23/2025 BOARD OF SUPERVISORS
On agenda:Final action:2/4/2025
Title:APPROVE and AUTHORIZE the Public Defender, or designee, to execute a contract amendment with
the California State University Long Beach Research Foundation, to increase the payment limit by
$14,000 to a new payment limit of $314,100, to provide survey incentives to Holistic Intervention
Partnership (HIP) participants, effective February 1, 2025 through June 1, 2026. (100% State)
Attachments:
Action ByDate Action ResultVer.Tally
To:Board of Supervisors
From:Ellen McDonnell, Public Defender
Report Title:Contract amendment with California State University Long Beach Research Foundation
☒Recommendation of the County Administrator ☐ Recommendation of Board Committee
RECOMMENDATIONS:
APPROVE and AUTHORIZE the Public Defender, or designee, to execute a contract amendment on contract
number 4945600, between Contra Costa County and California State University Long Beach Research
Foundation, to increase the payment limit by $14,000, to a new payment limit of $314,100, to provide survey
incentives to Holistic Intervention Partnership (HIP) participants, effective February 1, 2025 through June 1,
2026.
FISCAL IMPACT:
The additional cost of $14,000 ($20 per participant for 700 participants) will be funded 100% by California
State Board of Community Corrections.
BACKGROUND:
In August of 2022, the Contra Costa County Office of the Public Defender and the Contra Costa County Health,
Housing, and Homeless Services Department secured a $6 million grant from the California Board of State and
Community Corrections (BSCC) to expand the Holistic Intervention Partnership (HIP). HIP provides support
to those involved in the criminal legal system in an effort to improve outcomes for indigent Contra Costa
County residents who struggle with mental illness, substance dependence, and homelessness. The grant
provides dedicated funds to preserve or provide housing for the estimated 35% of Public Defender clients who
are unhoused or at risk of being unhoused and approximately half of the total amount funds housing staffing
and resources as well as direct dollars for housing for people involved in the local criminal legal system.
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The contract amendment increases of $14,000 will increase survey participation and contribute to quality
annual and final evaluation reports to BSCC.
CONSEQUENCE OF NEGATIVE ACTION:
If this amendment is not approved, the contracted evaluator’s efforts to gather sufficient data to evaluate and
analyze will be hindered and impact the overall grant outcomes.
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Legislation Details (With Text)
File #: Version:1RES 2025-24 Name:
Status:Type:Consent Resolution Passed
File created:In control:1/14/2025 BOARD OF SUPERVISORS
On agenda:Final action:2/4/2025 2/4/2025
Title:ADOPT Resolution No. 2025-24 accepting completion of private improvements for the Road
Improvement Agreement and release of cash deposit for land use permit LP16-02031, for a project
developed by CP Logistics Willow Pass, LLC, as recommended by the Public Works Director,
Concord area. (100% Developer Fees)
Attachments:
Action ByDate Action ResultVer.Tally
adoptedBOARD OF SUPERVISORS2/4/2025 1 Pass
To: Board of Supervisors
From:Warren Lai, Public Works Director/Chief Engineer
Report Title:Accepting completion of private improvements for the Road Improvement Agreement for land
use permit LP16-02031, Concord area.
☒Recommendation of the County Administrator ☐ Recommendation of Board Committee
RECOMMENDATIONS:
ADOPT Resolution accepting completion of private improvements for the Road Improvement Agreement and
release of cash deposit for faithful performance for land use permit LP16-02031,for a project developed by CP
Logistics Willow Pass, LLC, as recommended by the Public Works Director, Concord area. (District V)
FISCAL IMPACT:
100% Developer Fees.
BACKGROUND:
The developer has completed the private improvements per the Road Improvement Agreement,and in
accordance with the Title 9 of the County Ordinance Code.
CONSEQUENCE OF NEGATIVE ACTION:
The developer will not receive a refund of the cash deposit,the Road Improvement Agreement and surety bond
will not be exonerated, and completion of private improvements will not be accepted.
c: Kellen O’Connor, Engineering Services, Alex Vazquez, Engineering Services, Marke Smith, Engineering Services, Theresa Shepherd-
Design/Construction, Ciara Herrold, Finance, Michelle Mancuso-Watershed Program/Flood Control, Chris Halford, Mapping, Chris Lau,
Maintenance, CP Logistics Willow Pass, LLC, Berkshire Hathaway Specialty Insurance Company.
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File #:RES 2025-24,Version:1
THE BOARD OF SUPERVISORS OF CONTRA COSTA COUNTY, CALIFORNIA
and for Special Districts, Agencies and Authorities Governed by the Board
IN THE MATTER OF:Accepting completion of private improvements for the Road Improvement Agreement
and release of cash deposit for faithful performance for land use permit LP16-02031 for a project developed by
CP Logistics Willow Pass, LLC, as recommended by the Public Works Director, Concord area. (District V)
WHEREAS,the Public Works Director has notified this Board that the private improvements in land use permit
LP16-02031 have been completed as provided in the Road Improvement Agreement with CP Logistics Willow
Pass, LLC.
WHEREAS, these improvements are approximately located near Evora Road.
NOW,THEREFORE,BE IT RESOLVED that the improvements have been COMPLETED as of February 4,
2025,thereby establishing the six-month terminal period for the filing of liens in case of action under said Road
Improvement Agreement for land use permit LP16-02031:
DATE OF AGREEMENT: November 29, 2022
NAME OF SURETY: Berkshire Hathaway Specialty Insurance Company
BE IT FURTHER RESOLVED the payment (labor and materials)surety for $546,000.00,Bond No.47-SUR-
300037-01-0243 issued by the above surety be RETAINED for the six month lien guarantee period until August
4,2025,at which time the Board AUTHORIZES the release of said surety less the amount of any claims on
file.
BE IT FURTHER RESOLVED that there is no warranty period required,and the Public Works Director is
AUTHORIZED to refund the $10,920.00 cash security for performance (Auditor's Deposit Permit No.
DP859061,dated November 8,2022)plus interest in accordance with Government Code Section 53079,if
appropriate,to CP Logistics Willow Pass,LLC,pursuant to the requirements of the Ordinance Code;and the
Road Improvement Agreement and surety bond,Bond No.47-SUR-300037-01-0243,dated October 21,2022
CONTRA COSTA COUNTY Printed on 4/7/2025Page 2 of 3
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File #:RES 2025-24,Version:1
Road Improvement Agreement and surety bond,Bond No.47-SUR-300037-01-0243,dated October 21,2022
are EXONERATED.
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1025 ESCOBAR STREET
MARTINEZ, CA 94553CONTRA COSTA COUNTY
Legislation Details (With Text)
File #: Version:1RES 2025-25 Name:
Status:Type:Consent Resolution Passed
File created:In control:1/14/2025 BOARD OF SUPERVISORS
On agenda:Final action:2/4/2025 2/4/2025
Title:ADOPT Resolution No. 2025-25 approving and authorizing the Public Works Director, or designee, to
fully close a portion of Ramona Way, between 1556 Ramona Way and 1558 Ramona Way, on April
11, 2025, from 8:00 a.m. through 5:00 p.m., for the purpose of replacing a utility pole, Alamo area. (No
fiscal impact)
Attachments:
Action ByDate Action ResultVer.Tally
adoptedBOARD OF SUPERVISORS2/4/2025 1 Pass
To: Board of Supervisors
From:Warren Lai, Public Works Director/Chief Engineer
Report Title:Approve and Authorize to fully close a portion of Ramona Way on April 11, 2025, from 8:00
a.m. through 5:00 p.m., for the purpose of a utility pole replacement, Alamo area.
☒Recommendation of the County Administrator ☐ Recommendation of Board Committee
RECOMMENDATIONS:
ADOPT Resolution approving and authorizing the Public Works Director,or designee,to fully close a portion
of Ramona Way,between 1556 Ramona Way and 1558 Ramona Way,on April 11,2025,from 8:00 a.m.
through 5:00 p.m., for the purpose of replacing a utility pole, Alamo area. (District II)
FISCAL IMPACT:
No fiscal impact.
BACKGROUND:
Due to the narrow road width of Ramona Way at the work site,Pacific Gas &Electric Company (PG&E)has
requested the road closure to replace the existing utility pole.There is insufficient road width to setup and
operate boom trucks and safely maintain through traffic.This request was previously approved by the Board of
Supervisors in resolution RES 2024-350 but the work was delayed and PG&E requested a new closure date.
Applicant shall follow guidelines set forth by the Public Works Department.
CONSEQUENCE OF NEGATIVE ACTION:
Applicant will be unable to close the road to complete planned utility pole replacement.
c:Kellen O’Connor-Engineering Services,Bob Hendry-Engineering Services,Devon Patel-Engineering Services,Marke Smith-Engineering
Services, Chris Lau-Maintenance, CHP, Sheriff- Patrol Division Commander
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File #:RES 2025-25,Version:1
THE BOARD OF SUPERVISORS OF CONTRA COSTA COUNTY, CALIFORNIA
and for Special Districts, Agencies and Authorities Governed by the Board
IN THE MATTER OF:Approving and authorizing the Public Works Director,or designee,to fully close a
portion of Ramona Way,between 1556 Ramona Way and 1558 Ramona Way,on April 11,2025,from 8:00 a.m.
through 5:00 p.m., for the purpose of replacing a utility pole, Alamo area. (District II)
RC25-1
NOW,THEREFORE,BE IT RESOLVED that permission is granted to Pacific Gas &Electric (PG&E)to fully
close Ramona Way,between 1556 Ramona Way and 1558 Ramona Way,except for emergency traffic,local
residents,US Postal Service and garbage trucks,on April 11,2025,for the period of 8:00 a.m.through 5:00
p.m., subject to the following conditions:
1.Traffic will be detoured via roads identified in a traffic control plan,reviewed by the Public Works
Department per plan approved by Public Works.Emergency vehicles,residents within the construction area
and essential services will be allowed access as required.
2. All signing to be in accordance with the California Manual on Uniform Traffic Control Devices.
3.Pacific Gas &Electric Company shall comply with the requirements of the Ordinance Code of Contra
Costa County.
4.Provide the County with a Certificate of Insurance in the amount of $1,000,000.00 for Comprehensive
General Public Liability which names the County as an additional insured prior to permit issuance.
5.Obtain approval for the closure from the Sheriff’s Department,the California Highway Patrol and the
Fire District.
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1025 ESCOBAR STREET
MARTINEZ, CA 94553CONTRA COSTA COUNTY
Legislation Details (With Text)
File #: Version:125-371 Name:
Status:Type:Consent Item Passed
File created:In control:1/13/2025 BOARD OF SUPERVISORS
On agenda:Final action:2/4/2025 2/4/2025
Title:ADOPT Traffic Resolution No. 2025/4546 to establish a speed limit of 25 miles per hour on Pacifica
Avenue, which extends from Driftwood Drive to Port Chicago Highway, as recommended by the Public
Works Director, Bay Point area. (No fiscal impact)
Attachments:1. Traffic Resolution No. 2025/4546, 2. Signed Traffic Resolution No. 2025/4546.pdf
Action ByDate Action ResultVer.Tally
approvedBOARD OF SUPERVISORS2/4/2025 1 Pass
To:Board of Supervisors
From:Warren Lai, Public Works Director/Chief Engineer
Report Title:Establish a speed limit on Pacifica Avenue (Road No. 5094B), Bay Point area.
☒Recommendation of the County Administrator ☐ Recommendation of Board Committee
RECOMMENDATIONS:
ADOPT Traffic Resolution No.2025/4546 to establish a speed limit of 25 miles per hour (mph)on Pacifica
Avenue (Road No.5094B),which extends from Driftwood Drive (Road No.5094A)to Port Chicago Highway
(Road No.3481C),and RESCIND Traffic Resolution No.1970/1656,as recommended by the Public Works
Director, Bay Point area. (District V)
FISCAL IMPACT:
No fiscal impact
BACKGROUND:
Pacifica Avenue is classified as a major collector roadway by the Federal Highway Administration.Such a
classification requires that the speed limit be set according to standards established in the California Manual on
Uniform Traffic Control Devices (CA MUTCD)and California Vehicle Code (CVC)Section 22358,if the
speed limit is to be set lower than the prima facie speed limit of 55 or 65-mph.This requires an Engineering
and Traffic Survey (E&TS) to be conducted to establish an appropriate speed limit.
On January 9,2025,an E&TS was conducted according to established traffic engineering practices on Pacifica
Avenue.Based on the results of the E&TS,the Traffic Engineer recommends establishing a 25-mph on Pacifica
Avenue, beginning at Driftwood Drive and extending east to Port Chicago Highway.
This Board of Supervisors action will also rescind Traffic Resolution No.1970/1656,which set the current 35-
mph speed limit on Pacifica Avenue.
CONSEQUENCE OF NEGATIVE ACTION:
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The existing speed limit would remain on Pacifica Avenue.
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1025 ESCOBAR STREET
MARTINEZ, CA 94553CONTRA COSTA COUNTY
Legislation Details (With Text)
File #: Version:125-372 Name:
Status:Type:Consent Item Passed
File created:In control:1/13/2025 BOARD OF SUPERVISORS
On agenda:Final action:2/4/2025 2/4/2025
Title:ADOPT Traffic Resolution No. 2025/4547 to establish a school zone speed limit of 20 miles per hour
on a portion of Pacifica Avenue, as recommended by the Public Works Director, Bay Point area. (No
fiscal impact)
Attachments:1. Traffic Resolution No. 2025/4547, 2. Signed Traffic Resolution No. 2025/4547.pdf
Action ByDate Action ResultVer.Tally
approvedBOARD OF SUPERVISORS2/4/2025 1 Pass
To:Board of Supervisors
From:Warren Lai, Public Works Director/Chief Engineer
Report Title:Establish school zone speed limit on Pacifica Avenue (Road No. 5094B), Bay Point area.
☒Recommendation of the County Administrator ☐ Recommendation of Board Committee
RECOMMENDATIONS:
ADOPT Traffic Resolution No.2025/4547 to establish a school zone speed limit of 20 miles-per-hour (mph)
for a portion of Pacifica Avenue (Road No.5094B),beginning at Driftwood Drive (Road No.5094A)and
extending easterly to Bay Drive (Road No.5185N)as recommended by the Public Works Director,Bay Point
area. (District V)
FISCAL IMPACT:
No fiscal impact.
BACKGROUND:
An Engineering and Traffic Survey (E&TS)was recently completed on Pacifica Avenue in Bay Point within a
school zone,which features two schools (Rio Vista Elementary and Riverview Middle School)to establish a
school zone speed limit.
On January 1,2008,California Assembly Bill (AB)321 went into effect allowing local jurisdictions through an
ordinance or resolution to extend the 25-mph prima facie speed limit in school zones from 500 feet to 1,000
feet from the school grounds and to reduce the speed limit to 15 or 20-mph up to 500 feet from the school
grounds, under certain conditions.
California Vehicle Code (CVC)Section 22358.4 states the Board of Supervisors,through adopted resolution,
may reduce the speed limit on roads within 500 feet of a school to 15 or 20-mph based on an E&TS.CVC
Section 627 provisions justifying the reduced speed limit must be documented in an engineering study with the
following:crash records,highway conditions not readily apparent to the driver,residential density,and safety of
pedestrians and bicyclists.When established,the 20-mph school zone speed limit is in effect when children are
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File #:25-372,Version:1
pedestrians and bicyclists.When established,the 20-mph school zone speed limit is in effect when children are
present, which is generally during the periods when children are arriving to or departing from school.
Additionally,Assembly Bill 43 was signed into law on October 8,2021,authorizing local authorities to
consider the safety of vulnerable pedestrian groups such as children.Section 22358.7 of the CVC was added to
allow a reduction of five miles per hour to the current prima facie school zone speed limit (25-mph)if
supported by a valid E&TS conducted during school hours.
An E&TS was subsequently conducted according to established traffic engineering standards.The factual
findings of the survey determined this section of roadway had multiple unusual conditions;there are a high
number of pedestrians,students traveling within the roadway during school hours.There are six crosswalks on
Pacifica Avenue within the school zone,three are unmonitored/uncontrolled and used by elementary/middle
school aged children.The critical speed (85th percentile)was 24-mph.Based on the results of the E&TS and
supporting factors,the Traffic Engineer recommends the establishment of a school zone speed limit of 20-mph
for a portion of Pacifica Avenue,near Rio Vista Elementary and Riverview Middle School.This action will
allow law enforcement authorities the ability to enforce the 20-mph school zone speed limit when children are
present on Pacifica Avenue.
CONSEQUENCE OF NEGATIVE ACTION:
The existing 25-mph prima facie school zone speed limit will remain.
CHILDREN'S IMPACT STATEMENT:
A 20-mph school zone speed limit (when children are present) will alert motorists to lower speeds.
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1025 ESCOBAR STREET
MARTINEZ, CA 94553CONTRA COSTA COUNTY
Legislation Details (With Text)
File #: Version:1RES 2025-26 Name:
Status:Type:Consent Resolution Passed
File created:In control:1/16/2025 BOARD OF SUPERVISORS
On agenda:Final action:2/4/2025 2/4/2025
Title:ADOPT Ordinance No. 2025-01 to amend Division 1014 of the Ordinance Code (Stormwater
Management and Discharge Control) to enact new stormwater source control, site design, and
stormwater treatment requirements required by the new Municipal Regional Stormwater National
Pollutant Discharge Elimination System Permit issued by the California Regional Water Quality
Control Board, San Francisco Bay Region, and related Resolution No. 2025-26 approving a new C.3
Guidebook, as recommended by the Public Works Director, Countywide. (100% Stormwater Utility
Assessment Funds)
Attachments:1. Ordinance No. 2025-01, 2. Notice of Exemption, 3. C.3 Guidebook, 4. Signed Ordinance No. 2025-
01.pdf
Action ByDate Action ResultVer.Tally
adoptedBOARD OF SUPERVISORS2/4/2025 1 Pass
To: Board of Supervisors
From:Warren Lai, Public Works Director/Chief Engineer
Report Title:Adoption of Ordinance No.2025-01 to amend Division 1014 Stormwater Management and
Discharge Control and a Resolution approving a new C.3 Guidebook, Countywide.
☒Recommendation of the County Administrator ☐ Recommendation of Board Committee
RECOMMENDATIONS:
ADOPT Ordinance No.2025-01 to amend Division 1014 of the Ordinance Code (Stormwater Management and
Discharge Control)to enact new stormwater source control,site design,and stormwater treatment requirements
required by the new Municipal Regional Stormwater National Pollutant Discharge Elimination System
(NPDES)Permit issued by the California Regional Water Quality Control Board,San Francisco Bay Region,
Order No. R2-2022-0018, NPDES Permit No. CAS612008.
ADOPT the attached Resolution to approve a new C.3 Guidebook to assist new development projects to
comply with the requirements of the new NPDES permit and Division 1014 of the Ordinance Code.
DETERMINE that the activity is not subject to the California Environmental Quality Act (CEQA),pursuant to
Sections 15061(b)(3) of the CEQA Guidelines.
DIRECT the Director of the Department of Conservation and Development to file a Notice of Exemption with
the County Clerk.
AUTHORIZE the Public Works Director,or designee,to arrange for payment of a $25 fee to the Department of
Conservation and Development for processing,and a $50 fee to the County Clerk for filing the Notice of
Exemption.
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File #:RES 2025-26,Version:1
FISCAL IMPACT:
This project is funded by 100% Stormwater Utility Assessment Funds. Project No. 7517-6W7087
BACKGROUND:
The federal Clean Water Act (33 U.S.C.,§1251,et seq.)and the state Porter-Cologne Water Quality Control
Act (Cal.Wat.Code,§13000,et seq.)prohibit discharges of stormwater without a permit from the appropriate
California regional water quality board issued under the NPDES program.The California Regional Water
Quality Control Board,San Francisco Bay Region (RWQCB)issued two prior permits regulating stormwater
discharges by Contra Costa County (County)-Permit No CAS612008,Order No.R2-2009-0074,issued
October 14,2009,and NPDES permits CAS612008,issued November 19,2015 (Order No.R2-2015-0049),as
amended by Order R2-2019-0004,issued February 13,2019.The permits regulated stormwater discharges by
the County and required the County to impose discharge requirements on developments.After each order was
issued,the County amended Division 1014 of the Ordinance Code (Stormwater Management and Discharge
Control)to impose stormwater management and discharge requirements on new developments consistent with
the permit requirements.
In 2020,the Contra Costa Clean Water Program,which includes the County,the County Flood Control and
Water Conservation District,and all municipalities in the County,applied to the RWQCB for a new municipal
stormwater permit to discharge stormwater runoff from storm drains and watercourses in the jurisdiction.On
May 11,2022,the RWQCB issued new Municipal Regional Stormwater NPDES Permit No.CAS612008,
Order No.R2-2022-0018 (MRP)to regulate discharges of stormwater by the County and other members of the
Contra Costa Clean Water Program.Section C.3 of the MRP requires the County and other members of the
Contra Costa Clean Water Program to impose new source control,site design,and stormwater treatment
requirements on new development projects that meet specified criteria.
Ordinance No.2025-01 will amend Division 1014 of the County Ordinance Code to require new developments
in the unincorporated County to comply with the requirements of Section C.3 of the MRP.Generally,
Ordinance No. 2025-01 makes the following changes to Division 1014:
·Clarifies what constitutes prohibited discharges.
·Requires the following new development projects to comply with Section C.3 of the MRP:
o New development projects,previously undeveloped that create 5,000 square feet or more of
impervious surfaces,
o Development projects on previously developed sites that create or replace 5,000 square feet or
more of impervious surface.Some exceptions are individual single-family home projects less
than 10,000 square feet,interior models,routine maintenance,public road and trail projects,
public works projects less than 5,000 contiguous square feet of impervious surface,and some
pavement maintenance practices,
o Construction of new streets or roads,except sidewalks or bicycle lanes in the project that direct
stormwater to adjacent vegetated areas,certain impervious trails,sidewalks,bicycle lanes or
trails built as pervious pavement systems, State of California highway projects,
o Public and other streets or roads that create or replace one contiguous acre or more of
impervious surface, and
o Single-family home projects with just one home,including an accessory dwelling unit that
creates or replaces 10,000 square feet or more of impervious surface and is not part of a larger
development or redevelopment plan.
·Exempts certain unpolluted discharges from complying with the requirements.Unpolluted discharges
include discharges from residential foundation,crawl space,or footing drains,and groundwater pumped
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File #:RES 2025-26,Version:1
include discharges from residential foundation,crawl space,or footing drains,and groundwater pumped
for drinking water purposes, among others.
·Clarifies that developments approved earlier are required to comply with the requirements in effect at
the time the developments were approved.
California Environmental Quality Act (CEQA).The Department of Conservation and Development staff
have determined that the approval of Ordinance No.2025-01 is exempt from CEQA environmental review
under CEQA Guidelines Section 15061(b)(3),general rule of applicability.This exemption applies to projects
that will have no significant effect on the environment.Adopting the ordinance and implementing the MRP will
not adversely impact the environment,but will actually improve the environment by treating rainwater that
flows over impervious surfaces.
Ordinance No.2025-01 was introduced on January 21,2025.Public Works Department staff recommend that
the Board adopt Ordinance No.2025-01 to ensure that the County can regulate new developments and comply
with the new requirements of the MRP.Staff also recommend that the Board adopt the accompanying
Resolution to approve a new C.3 Guidebook,which will assist development applicants with complying with the
MRP and the new requirements enacted by Ordinance No. 2025-01.
CONSEQUENCE OF NEGATIVE ACTION:
If this ordinance is not adopted,the County will be unable to meet its obligations under the MRP under the
NPDES Program and could be subject to fines and other penalties imposed by the regional water quality control
board.
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File #:RES 2025-26,Version:1
THE BOARD OF SUPERVISORS OF CONTRA COSTA COUNTY, CALIFORNIA
and for Special Districts, Agencies and Authorities Governed by the Board
IN THE MATTER OF:APPROVE the Contra Costa Clean Water Program Stormwater C.3 Guidebook,
Stormwater Quality Requirements for Development Applications.
WHEREAS, The Board of Supervisors of Contra Costa County RESOLVES that:
WHEREAS,the federal Clean Water Act (33 U.S.C.,§1251,et seq.)and the state Porter-Cologne Water
Quality Control Act (Wat.Code,§13000,et seq.)prohibit discharges of stormwater without a permit from the
appropriate California regional water quality board under the National Pollutant Discharge Elimination System
(NPDES) program; and
WHEREAS,Contra Costa County,the Contra Costa County Flood Control and Water Conservation District,
and the Cities of Antioch,Brentwood,Clayton,Concord,El Cerrito,Hercules,Lafayette,Martinez,Oakley,
Orinda,Pinole,Pittsburg,Pleasant Hill,Richmond,San Pablo,San Ramon,Walnut Creek,and the Towns of
Danville and Moraga, established the Contra Costa Clean Water Program; and
WHEREAS,the Contra Costa Clean Water Program applied for and was issued a municipal regional
stormwater NPDES permit by the California Regional Water Quality Control Board for the San Francisco Bay
Region,Order No.R2-2022-0018,NPDES Permit No.R2-2022-0018,issued May 11,2022 (the “Municipal
Regional Stormwater Permit”); and
WHEREAS,the Municipal Regional Stormwater Permit requires the implementation of selected Best
Management Practices (BMPs) to minimize or eliminate pollutants from entering waterways; and
WHEREAS,pursuant to the Municipal Regional Stormwater Permit,the County Board of Supervisors adopted
Ordinance No.2025-01 to amend Division 1014 of the Ordinance Code to codify permit requirements that will
be imposed on new developments to ensure the County complies with the permit requirements; and
WHEREAS,the Contra Costa Clean Water Program created a Low Impact Development program to comply
with Municipal Regional Stormwater Permit,Provision C.3,New and Redevelopment,and developed an
accompanying Stormwater C.3 guidebook.
NOW,THEREFORE,BE IT RESOLVED that the Contra Costa County Board of Supervisors does hereby
APPROVE the Contra Costa Clean Water Program Stormwater C.3 Guidebook,Stormwater Quality
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File #:RES 2025-26,Version:1
Requirements for Development Applications, attached hereto.
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Adoption of Stormwater Ordinance 2024-20 (WO7087)_10-10-24.docx Revised 2018
CALIFORNIA ENVIRONMENTAL QUALITY ACT
Notice of Exemption
Office of Planning and Research
P.O. Box 3044, Room 113
Sacramento, CA 95812-3044
:Contra Costa County
Department of Conservation and
Development
30 Muir Road
Martinez, CA 94553
Project Title: Adoption of Stormwater Ordinance 2025-01, Project #: WO7087, CP#: 24-24
Project Applicant: Contra Costa County Public Works Dept., 255 Glacier Drive, Martinez CA 94553
Main: (925) 313-2000, Contact: Claudia Gemberling, (925) 313-2192
Project Location: Unincorporated communities in Contra Costa County
Lead Agency: Department of Conservation and Development, 30 Muir Road, Martinez, CA 94553
Main: (925) 655-2705, Contact: Syd Sotoodeh (925) 655-2877, syd.sotoodeh@dcd.cccounty.us
Project Description: The County plans to adopt an Ordinance to amend Division 1014 of the County
Ordinance Code (Stormwater Management and Discharge Control) to enact new stormwater source
control, site design, and stormwater treatment requirements required by the new National Pollution
Discharge Elimination System (NPDES), Municipal Regional Stormwater Permit (M RP) i ssued by the
California Regional Water Quality Control Board, San Francisco Bay Region (RWQCB), Order No. R2-
2022-0018, NPDES Permit No. CAS612008 and adopt a Resolution to approve a new C.3 Guidebook to
assist new development projects to comply with the requirements of the new NPDES permit and Division
1014 of the County Ordinance Code.
The federal Clean Water Act (33 U.S. C., § 1251, et seq.) and the state Porter-Cologne Water Quality
Control Act (Cal. Wat. Code, § 13000, et seq.) prohibit discharges of stormwater without a permit from
the appropriate RWQCB issued under the NPDES program. The RWQCB issued two prior Orders under
NPDES Permit No. CAS612008 regulating stormwater discharges by the County – Order No. R2-2009-
0074 issued October 4, 2009, and Order No. R2-2015-0049 issued November 19, 2015 as amended by
Order R2-2019-0004, issued February 13, 2019. The Orders regulated stormwater discharges by the
County and required the County to impose discharge requirements on developments. After each Order
was issued, the County amended Division 1014 of the County Ordinance Code (Stormwater
Management and Discharge Control) to impose stormwater management and discharge requirements
on new developments consistent with the Permit requirements.
In 2020, the Contra Costa Clean Water Program, which includes the County, the Flood Control District,
and all municipalities in the County, applied to the RWQCB for a new MRP to discharge stormwater
runoff from storm drains and watercourses in the jurisdiction of the County and municipalities. On May
11, 2022, the RWQCB issued a new Order under NPDES Permit No. CAS612008 for the MRP (Order
No. R2-2022-0018) to regulate discharges of stormwater by the County and other members of the Contra
Costa Clean Water Program. Section C.3 of the MRP requires the County and other members of the
Contra Costa Clean Water Program to impose new source control, site design, and stormwater
treatment requirements on new development projects that meet specified criteria. Generally, Ordinance
No. 2025-01 makes the following changes to Division 1014 of the County Ordinance Code:
• Clarifies what constitutes prohibited discharges.
• Requires the following new development projects to comply with Section C.3 of the MRP:
o New development projects, previously undeveloped that create 5,000 square feet or more of
impervious surfaces,
o Development projects on previously developed sites that create or replace 5,000 square feet
or more of impervious surface. Some exceptions are: individual single family home projects
less than 10,000 square feet, interior models, routine maintenance, publi
and some pavement maintenance practices,
o Construction of new streets or roads, except sidewalks or bicycle lanes in the project that
direct stormwater to adjacent vegetated areas, certain impervious trails, sidewalks, bicycle
lanes or trails built as pervious pavement systems, state of California highway projects,
o Public and other streets or roads that create or replace one contiguous acre or more of
impervious surface, and
G:\engsvc\ENVIRO\Client Divisions\Clean Water and Watershed\2-Watershed Program\CEQA\Adopt Ordinance No. 2025-01 (6W7087)\NOE\D2\CP#24-24 NOE
Adoption of Stormwater Ordinance 2024-20 (WO7087)_10-10-24.docx Revised 2018
o Single-family homes projects with just one home, including an accessory dwelling unit that
create or replace 10,000 square feet or more of impervious surface and are not part of a larger
development or redevelopment plan.
•
groundwater pumped for drinking water purposes, among others.
•
at the time the developments were approved.
Adoption of Ordinance No. 2025-01 is anticipated to be introduced to the County Board of Supervisors
in November 2024 along with adoption of a Resolution to approve a new C.3 Guidebook, which will assist
development applicants with complying with the MRP and the new requirements enacted by
Ordinance No. 2025-01.
Exempt Status:
Ministerial Project (Sec. 21080[b][1]; 15268) Categorical Exemption (Sec. 15306)
Emergency Project (Sec. 21080[b][4]; 15269[b][c]) Other Statutory Exemption (Sec. )
The adoption of the Ordinance and Resolution is not subject to CEQA
as it can be seen with certainty that there is no possibility that the activity
on the environment, pursuant to Article 5, Section 15061(b)(3) of the CEQA Guidelines.
If filed by applicant:
2. Has a Notice of Yes No
Contra Costa County Department of Conservation and Development
Signed by Lead Agency Signed by Applicant
01/15/2025 Senior Planner
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Adoption of Stormwater Ordinance 2024-20 (WO7087)_1-15-25.docx Revised 2018
0BAFFIDAVIT OF FILING AND POSTING
I declare that on I received and posted this notice as required by
California Public Resources Code Section 21152(c). Said notice will remain posted for 30
Applicant Department of Fish and Wildlife Fees Due
Environmental Services Division
Total Due: $75 Receipt #:
STORMWATER C.3 GUIDEBOOK
Stormwater Quality Requirements for Development Applications
9th Edition
April 12, 2024
Visit www.cccleanwater.org for updates.
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Stormwater C.3 Guidebook
Contra Costa Clean Water Program
925-313-2360
Antioch
Brentwood
Clayton
Concord
Danville
El Cerrito
Hercules
Lafayette
Martinez
Moraga
Oakley
Orinda
Pinole
Pittsburg
Pleasant Hill
Richmond
San Pablo
San Ramon
Walnut Creek
Contra Costa County
Contra Costa County Flood Control and Water Conservation District
9TH EDITION
Prepared with assistance from
Haley & Aldrich, Inc.
Lotus Water
Dubin Environmental Consulting
and Restoration Design Group (graphics)
APRIL 12, 2024
Previous editions
Prepared with assistance from
Dan Cloak Environmental Consulting
Restoration Design Group (graphics)
Haley & Aldrich, Inc. and Dubin Environmental Consulting
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S T O R M W A T E R C . 3 . G U I D E B O O K
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Table of Contents
STORMWATER GLOSSARY vi
HOW TO USE THIS GUIDEBOOK 1
CHAPTER 1. POLICIES AND PROCEDURES 5
Thresholds, Effective Dates, and Requirements 5
ʇ The “50% Rule” for projects on Previously Developed Sites 5
C.3 Applicability and Entitlements 7
ʇ Definition of a “Project” 8
ʇ Grandfathering 8
ʇ Provision C.3 Compliance Requirements for Subdivision Maps 8
ʇ Phased Projects 10
Projects in Public Roads or Right-of-Way 11
Hydromodification Management Requirements 11
ʇ Exemptions 12
ʇ Sites that Are Already Partially Developed 12
ʇ Compliance with HM Requirements 12
ʇ HM Requirements - Recent Update 13
Offsite Compliance Options for Runoff Treatment 13
CHAPTER 2. PREPARING A STORMWATER CONTROL PLAN 15
Project Data 17
Setting 18
Existing Features and Site Conditions 18
Identify Constraints & Opportunities 19
Low Impact Development Design Strategies 19
Documentation of Drainage Design 19
Source Control Measures 21
Stormwater Facility Maintenance 22
Construction Plan C.3 Checklist 23
Certification 24
Stormwater Control Plan Report Sample Outline 24
Stormwater Control Plan Template 25
Example Stormwater Control Plans 25
CHAPTER 3. LOW IMPACT DEVELOPMENT SITE DESIGN GUIDE 27
Analyze Your Project for LID 28
ʇ References and Resources 29
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ʇ Optimize the Site Layout 30
ʇ Use Pervious Surfaces 31
ʇ Disperse Runoff to Adjacent Pervious Areas 31
ʇ Direct Runoff to Bioretention or Other IMPs 32
ʇ References and Resources 34
Develop and Document Your LID Drainage Design 34
ʇ Step 1: Delineate DMAs 35
ʇ Step 2: Classify DMAs and Determine Runoff Factors 35
ʇ Step 3: Tabulate Drainage Management Areas 41
ʇ Step 4: Select and Lay Out IMPs on Site Plan 42
ʇ Step 5: Calculate Minimum IMP Area and Volumes 42
ʇ Step 6: Determine if IMP Area and Volume are Adequate 44
ʇ Step 7: Present IMP Sizing Calculations 44
Integrating Your LID Design into Your Project 45
Reduced Bioretention Sizing 46
Non-LID Treatment 46
ʇ Special Projects 46
ʇ Alternative Treatment Systems 48
ʇ Technical Criteria for Non-LID Facilities 49
ʇ Example Calculations: 50
ʇ Demonstration of Infeasibility is Required 51
ʇ References and Resources 52
Crosswalk Summary of CCCWP IMPs and BAHM Model Elements 52
CHAPTER 4. DESIGN AND CONSTRUCTION OF BIORETENTION FACILITIES AND
OTHER INTEGRATED MANAGEMENT PRACTICES 87
What to Show on Construction Plans 88
ʇ Show Key Elevations 88
ʇ Show How Runoff Flows 89
ʇ Show IMPs in Cross-Section 89
ʇ Add Notes to IMP Details 90
What to Show on Landscaping Plans 90
ʇ References and Resources 91
Items to Be Inspected During Construction 91
Bioretention Soil Submittals 94
CHAPTER 5. OPERATION & MAINTENANCE OF STORMWATER FACILITIES 95
Stage 1: Ownership and Responsibility 96
ʇ Private Ownership and Maintenance 97
ʇ Transfer to Public Ownership 98
Stage 2: General Maintenance Requirements 98
Stage 3: Stormwater Facilities O&M Plan 99
ʇ Tools and Assistance 99
ʇ Your O&M Plan: Step by Step 100
ʇ Step 1: Designate Responsible Individuals 100
ʇ Step 2: Summarize Drainage and BMPs 101
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ʇ Step 3: Document Facilities “As Built” 101
ʇ Step 4: Prepare Customized Maintenance Plans 102
ʇ Step 5: Compile O&M Plan 102
ʇ Step 6: Updates 105
Stage 4: Interim Operation & Maintenance 105
Stage 5: Transfer Responsibility 105
Stage 6: Operation & Maintenance Verification 105
Design to Minimize Long-Term Maintenance 106
ʇ Typical Maintenance Program 106
ʇ References and Resources 107
CHAPTER 6. RETROFITTING WITH GREEN INFRASTRUCTURE 109
Project Identification 110
Follow these Steps 110
ʇ Step 1: Locate Low Points 110
ʇ Step 2: Review Areas Adjacent to Low Points 111
ʇ Step 3: Evaluate the Tributary Catchment 111
ʇ Step 4: Calculate Minimum Facility Sizes 112
ʇ Step 5: Sketch and Evaluate a Preliminary Facility Footprint 113
Design, Construction, and Maintenance 114
ʇ References and Resources 114
BIBLIOGRAPHY ................................................................................................................................................................................... 115
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Appendices
APPENDIX A: Local Exceptions and Additional Requirements
Obtain from municipal planning staff.
APPENDIX B: Plant Recommendation for Bioretention Facilities and Planter Boxes
APPENDIX C: Preparing a Stormwater Control Plan for a Small Development Project
APPENDIX D: Pollutant Sources/Source Control Checklist
APPENDIX E: Regulatory and Technical Background
APPENDIX F: Green Infrastructure Details
APPENDIX G: Development Review Checklist
APPENDIX H: Worked Examples of Hydromodification Sizing
Figures
FIGURE 2-1 ILLUSTRATION OF REPLACED IMPERVIOUS AREA ............................................................................ 18
FIGURE 3-1 SELF-TREATING AREAS ......................................................................................................................................37
FIGURE 3-2 SELF-RETAINING AREAS ...................................................................................................................................38
FIGURE 3-3 AREAS DRAINING TO SELF-RETAINING AREAS ....................................................................................39
FIGURE 3-4 DELINEATE EACH SURFACE AS A SEPARATE DMA ..............................................................................41
Tables
TABLE 1-1 THRESHOLDS AND REQUIREMENTS FOR PARCEL-BASED PROJECTS .......................................... 7
TABLE 1-2 THRESHOLDS FOR PUBLIC ROAD AND TRAIL PROJECTS ................................................................11
TABLE 2-1 FORMAT FOR REPORTING PROJECT DATA .............................................................................................17
TABLE 2-2 FORMAT FOR TABLE OF PERMANENT AND OPERATIONAL SOURCE CONTROL
MEASURES ................................................................................................................................................................ 22
TABLE 2-3 FORMAT FOR CONSTRUCTION PLAN C.3 CHECKLIST ....................................................................... 23
TABLE 3-1 IDEAS FOR RUNOFF MANAGEMENT ........................................................................................................ 29
TABLE 3-2 RUNOFF FACTORS FOR EVALUATING DRAINAGE TO SELF-RETAINING AREAS FOR
WATER QUALITY TREATMENT ONLY PROJECTS ................................................................................ 40
TABLE 3-3 FORMAT FOR TABULATION OF DRAINAGE MANAGEMENT AREAS ...........................................41
TABLE 3-4 IMP SELECTION .....................................................................................................................................................42
TABLE 3-5 MINIMUM IMP AREAS AND VOLUMES FOR TREATMENT ONLY ....................................................43
TABLE 3-6 BAHM TERMINOLOGY AND CROSS REFERENCE TABLE ................................................................. 52
TABLE 5-1 SCHEDULE FOR PLANNING OPERATION AND MAINTENANCE OF STORMWATER
TREATMENT AND FLOW-CONTROL FACILITIES ................................................................................. 96
Checklists
STORMWATER CONTROL PLAN CHECKLIST ......................................................................................................................... 16
IMP CONSTRUCTION CHECKLIST .................................................................................................................................................92
SOURCES AND SOURCE CONTROL BMP CHECKLIST. ..................................................................................................... D-1
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Design Sheets
RUNOFF REDUCTION MEASURES ................................................................................................................................................. 55
PERVIOUS PAVEMENTS ................................................................................................................................................................... 59
BIORETENTION FACILITIES ............................................................................................................................................................ 63
FLOW-THROUGH PLANTERS ........................................................................................................................................................... 75
DRY WELLS AND INFILTRATION BASINS ............................................................................................................................... 79
CISTERN + BIORETENTION FACILITY ....................................................................................................................................... 81
BIORETENTION + VAULT ................................................................................................................................................................. 83
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S T O R M W A T E R C . 3 . G U I D E B O O K
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Stormwater Glossary
Bay Area Hydrology Model (BAHM)
A software tool for design of flow control structures to meet
hydromodification management requirements for new
development or redevelopment projects.
Bay Area Municipal Stormwater
Collaborative (BAMSC)
--successor to the Bay Area
Stormwater Management Agencies
Association (BASMAA)
Informal collaborative of Bay Area municipal stormwater
programs, including the Contra Costa Clean Water Program.
BAMSC implements various regional activities mandated by the
Municipal Regional Permit, provides a forum for promoting
regional consistency among stormwater programs, and
coordinates negotiations with the Regional Water Board on behalf
of the permittees.
Best Management Practice (BMP)
Any procedure or device designed to minimize the quantity of
pollutants that enter the storm drain system or to control
stormwater flow.
Bioretention
The practice of capturing runoff within a matrix of soil and plant
roots. Following capture, the runoff is evapotranspirated or
infiltrated to surrounding and underlying soils. During frequent or
intense runoff events, the soil-and-plant-root matrix may become
saturated, in which case excess runoff may be discharged to an
underdrain (biotreatment).
Biotreatment
The practice of filtering runoff through a matrix of soil and plant
roots prior to discharge to a receiving water or municipal storm
drain.
C.3
Provision in the Municipal Regional Permit. Requires the
Permittees to use their planning authorities to include appropriate
source control, site design, and stormwater treatment measures in
new development and redevelopment projects to address
pollutant discharges and prevent increases in runoff flows.
C.3 Web Page https://www.cccleanwater.org/development-
infrastructure/development
California Environmental Quality
Act (CEQA)
California law that requires public agencies to evaluate the
environmental impacts of development projects.
California Stormwater Quality
Association (CASQA)
Publisher of the California Stormwater Best Management
Practices Handbooks.
www.casqa.org
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Condition of Approval (COA)
Requirements a municipality may adopt for a project in
connection with a discretionary action (e.g., adoption of a negative
declaration or issuance of a use permit). COAs may specify
features required to be incorporated into the final plans for the
project and may also specify uses, activities, and operational
measures that must be observed over the life of the project.
Contra Costa Clean Water Program
(CCCWP)
CCCWP was established by an agreement among 19 Contra Costa
cities and towns, Contra Costa County, and the Contra Costa
County Flood and Water Conservation District. CCCWP
implements common tasks and assists the member agencies to
implement their local stormwater pollution prevention programs.
Design Storm A hypothetical rainstorm defined by rainfall intensities and
durations.
Detention
The practice of holding stormwater runoff in ponds, vaults, within
berms, or in depressed areas and letting it discharge slowly to the
storm drain system. See definitions of Infiltration and Retention.
Directly Connected Impervious Area
Any impervious surface which drains into a catch basin, area
drain, or other conveyance structure without first flowing across
pervious areas.
Direct Infiltration
Infiltration via methods or devices, such as dry wells or infiltration
trenches, designed to bypass unsaturated surface soils and
transmit runoff directly to groundwater.
Drainage Management Area (DMA)
Site areas subdivided by surface types for the purposes of a
Stormwater Control Plan with each DMA identified as self-
treating, self-retaining (zero-discharge), draining to a self-retaining
area, or draining to an integrated management practice (IMP).
Drawdown time
The time required for a stormwater detention or infiltration
facility to drain and return to the dry-weather condition. For
detention facilities, drawdown time is a function of basin volume
and outlet orifice size. For infiltration facilities, drawdown time is
a function of basin volume and infiltration rate.
Harvesting and Reuse
The practice of capturing runoff and storing it for later use.
Typical non-potable uses include toilet flushing, landscape
irrigation, and industrial uses such as concrete production or
washing.
Head
In hydraulics, energy represented as a difference in elevation. In
slow-flowing open systems, the difference in water surface
elevation, e.g., between an inlet and outlet.
Hydrograph Runoff flow rate plotted as a function of time.
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Hydromodification
Management (HM)
Control of runoff intensities and durations to reduce the potential
for downstream erosion.
Hydrologic Soil Group
Classification of soils by the Natural Resources Conservation
Service (NRCS) into A, B, C, and D groups according to
infiltration capacity.
IMP Sizing Calculator
A stand-alone application created by the CCCWP to facilitate the
iterative calculations needed to size integrated management
practices (IMPs) for Municipal Regional Stormwater Permit
compliance. The calculator is available, along with instructions for
its use, on the CCCWP’s C.3 web page.
Impervious surface
Any material that prevents or substantially reduces infiltration of
water into the underlying soil. See discussion of imperviousness in
Chapter 2.
Indirect Infiltration Infiltration via facilities, such as bioretention areas, expressly
designed to treat runoff and then allow infiltration to surface soils.
Infiltration Seepage of runoff through soil to underlying groundwater. See
Retention.
Infiltration Device
Any structure that is designed to infiltrate stormwater into the
subsurface and, as designed, bypasses the natural groundwater
protection afforded by surface or near-surface soil. See Direct
Infiltration.
Infiltration Rate Rate at which water can be added to a soil without creating
runoff. See Percolation Rate.
Integrated Management Practice
(IMP)
A facility Best Management Practice (BMP) that provides small-scale
treatment, retention, and/or detention and is integrated into site
layout, landscaping, and drainage design. See Low Impact
Development.
Lead Agency
The public agency that has the principal responsibility for carrying
out or approving a project. (California Environmental Quality Act
Guidelines [CEQA §15367]).
Low Impact Development (LID)
A stormwater management strategy aimed at maintaining or
restoring the natural hydrologic functions of a site. LID design
detains, treats, and infiltrates runoff by minimizing impervious
area, using pervious pavements and green roofs, dispersing runoff
to landscaped areas, and routing runoff to rain gardens, cisterns,
swales, and other small-scale facilities distributed throughout a
site.
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Maximum Extent Practicable (MEP)
Standard, established by the 1987 amendments to the Clean Water
Act, for the reduction of pollutant discharges from municipal
storm drains.
Municipal Regional Stormwater
Permit (MRP)
A stormwater National Pollutant Discharge Elimination System
(NPDES) permit and Waste Discharge Requirements issued by
the San Francisco Bay Regional Water Quality Control Board in
2009 (MRP 1.0) to cities, towns, and Flood Control Districts in
five Bay Area counties. Reissued in 2015 (MRP 2.0) and in May
2022 (MRP 3.0).
National Pollutant Discharge
Elimination System (NPDES)
As part of the 1972 Clean Water Act, Congress established the
NPDES permitting system to regulate the discharge of pollutants
from municipal sanitary sewers and industries. NPDES was
expanded in 1987 to incorporate permits for stormwater
discharges.
National Resources Conservation
Services (NRCS)
Federal government organization that classifies soils into
hydrologic soil groups A, B, C, and D groups according to
infiltration capacity.
Numeric Criteria Sizing requirements for stormwater treatment facilities established
in Provision C.3.d. of the Municipal Regional Permit.
Operation and Maintenance (O&M)
Refers to requirements in the Municipal Regional Permit to
inspect treatment BMPs and implement preventative and
corrective maintenance in perpetuity. See Chapter 5.
Percolation Rate The rate at which water flows through a soil.
Permeable or Pervious or Porous
Pavements
Pavements for roadways, sidewalks, or plazas that are designed to
infiltrate runoff, including pervious concrete, pervious asphalt,
porous pavers, and granular materials. See the Design Sheet for
Pervious Pavements.
Permeability The rate at which water flows through a saturated soil under
steady state conditions.
Pervious surface Any material that allows infiltration of runoff into underlying soil.
Pre-Project Conditions that exist on a development site immediately before
the project, to which municipal approvals apply.
Project
The whole of an action which has the potential for adding or
replacing or resulting in the addition or replacement of roofs,
pavement, or other impervious surfaces. This definition is
consistent with the CEQA definition of a project.
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Proprietary Stormwater Treatment
Facilities
Products designed and marketed by private businesses for
treatment of stormwater. Many of these products do not meet
requirements of the Municipal Regional Permit.
Rational Method
A method of calculating runoff flows based on rainfall intensity,
tributary area, and a runoff coefficient representing the proportion
of rainfall that runs off based on the type of ground cover.
Regional Water Quality Control
Board (Regional Water Board or
RWQCB)
California RWQCBs are responsible for implementing pollution
control provisions of the Clean Water Act and California Water
Code within their jurisdiction. There are nine California
RWQCBs. Contra Costa County municipalities are under the
jurisdiction of the RWQCB for the San Francisco Bay Region for
stormwater discharges.
Regulated Project
A land development project that meets the definition of Regulated
Project in Municipal Regional Permit Provision C.3.b. See
Table 1-1 on page 7.
Replaced Impervious Area
In redeveloped projects, replaced impervious area refers to the
square footage of existing impervious area that will be replaced
with new impervious surfaces after redevelopment. See
Illustration 2-1 on p. 18.
Retention
Practices such as infiltration, harvest and use, and
evapotranspiration that reduce the amount of runoff discharged
from a site.
Runs with the land A legal expression with particular meaning that whoever owns the
land has the obligation
Self-retaining area
An area designed to retain runoff. Self-retaining areas may include
graded depressions with landscaping or pervious pavements. See
Figure 3-2 on page 37.
Self-treating area
Natural, landscaped, or turf areas that do not drain to IMPs, but
rather drain overland off site or to the storm drain system. See
Figure 3-1 on page 36.
Source Control A facility or procedure to prevent pollutants from entering runoff.
Stormwater
Control Plan
A plan specifying and documenting permanent features and
facilities to control pollutants and stormwater flows for the life of
the project.
Stormwater Control
Operation & Maintenance Plan
A plan detailing operation and maintenance requirements for
stormwater treatment and flow-control facilities incorporated into
a project.
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Storm Water Pollution Prevention
Plan (SWPPP)
A plan documenting temporary measures to control sediment and
other pollutants during construction.
Stormwater Treatment Facility
Stormwater facility that is intended to remove pollutants from
stormwater. Facilities can include LID treatment and HM
treatment, as well as non-LID treatment
Surface Loading Rate
The flow applied to a filter divided by the filter surface area.
Stormwater facility that is intended to remove pollutants from
stormwater. Facilities can include LID treatment and HM
treatment, as well as non-LID treatment
Treatment Removal of pollutants from runoff, typically by filtration or
settling.
WEF Method
A method developed by the Water Environment Federation
(WEF) for determining the minimum design volume of
stormwater treatment facilities, described in Urban Runoff Quality
Management (WEF/ASCE, 1998).
Water Board See Regional Water Quality Control Board.
Water Quality Volume (WQV)
For stormwater treatment facilities that depend on detention to
work, the volume of water that must be detained for a minimum
specified drawdown time to achieve pollutant removal.
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Do These Things First
Start out on the right track.
HIS Stormwater C.3 Guidebook (Guidebook) will help you design your
project to meet local requirements for Low Impact Development (LID)
drainage design—and ensure that your project complies with the C.3
requirements in the third reissuance of the San Francisco Bay Regional
Water Quality Control Board (Water Board)’s Municipal Regional Stormwater
Permit (MRP 3.0). MRP 3.0 can be accessed online at the Water Board's website.
First, confirm which requirements apply to your project. See Table 1-1, page 7.
Then, engage your whole project team. LID drainage design disperses, infiltrates,
detains, and treats runoff using landscape features and engineered bioretention
facilities (“rain gardens”) dispersed throughout the site. LID features and facilities
are integrated into the project’s landscaping and, when properly designed, can be
used for active or passive retention. Your site designer, architect, landscape
architect, and drainage engineer need to work together on the LID drainage design
from concept to completion.
Your team should prepare and refine the LID drainage design concurrently with
sketching building footprints, internal roadways and circulation, parking, and
landscape features. For subdivisions, LID drainage design should be initiated before
sketching parcel lines and before the first stages of producing a tentative map. Use
the guidance and tools in Chapter 3.
Consider, at the outset, who will own the LID features and facilities, who will be
responsible for their maintenance, and how they will be maintained. See Chapter 5.
In a pre-application meeting with municipal planning staff, discuss the basic
elements of, or ideas for, your LID design along with other project objectives and
features.
Start Â
T
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Integrate the materials you prepare for discretionary review so that the visual
and aesthetic characteristics of your LID features and facilities—including valley
gutters, conveyance swales, dispersal areas, and bioretention facilities—are
accurately represented in the preliminary site plan, landscaping plan, and renderings.
Use the design criteria in Chapters 3 and 4, and the
IMP Sizing Calculator available on the Contra
Costa Clean Water Program (CCCWP) website
(https://www.cccleanwater.org/development-
infrastructure/development/stormwater-c-3-
guidebook), to evaluate your LID drainage design
for compliance with the runoff-treatment and flow-
control requirements that apply to your project.
Then, adjust your design and iterate your entries into the IMP Sizing Calculator until
you have an aesthetic and functional LID design that meets the numeric criteria
outlined in Provision C.3.d of the MRP 3.0.
Follow the step-by-step guidance in Chapter 2, and use the template provided, to
prepare a Stormwater Control Plan submittal that will accompany your application
for entitlements and development approvals.
Plan ahead to ensure the required elevations, details, cross-sections, and notes
appear in your construction plan set. See “What to Show on Construction Plans”
on page 92, “Items to Be Inspected During Construction” on page 95, and the
model construction inspection checklist on pages 96 through 97.
Draft a separate, required Stormwater Facilities Operation and Maintenance Plan
(O&M Plan) using the instructions in Chapter 5 and the template provided. The
O&M Plan is to be referenced in a typically required Operation and Maintenance
Agreement that “runs with the land.”
The most recent version of this Guidebook, updates and
errata, templates, and example submittals are on the
CCCWP website. The Guidebook is formatted for 2-sided
printing or, when viewed as a.pdf, allows the use of
hyperlinks for internal navigation and to access external
references and resources.
The CCCWP 9th edition was updated from the 8th edition to incorporate changes
to compliance requirements stemming from MRP 3.0. In MRP 3.0, Provision
C.3.g.v.(2) directs CCCWP Permittees to require development projects subject to
HM to use the methods and criteria in the Guidebook. For projects requiring HM,
permittees are now required to use the Bay Area Hydrology Model (BAHM) instead
of the Integrated Management Practices (IMP) Calculator; updates in the 9th
Edition Guidebook reflect this change and provide related guidance.
Construction-Phase Controls
Your Stormwater Control Plan is a
separate document from the Storm Water
Pollution Prevention Plan (SWPPP). A
SWPPP provides for temporary measures
to control sediment and other pollutants
during construction. See the CCCWP
website for information on requirements
for construction-phase controls.
Flood Controls:
Implementation of the LID and
Hydromodification (HM)
requirements in this Guidebook is
separate from, and in addition to,
flood control requirements that
may apply to your project.
S T A R T
9th Edition APRIL 12, 2024 3
Guidance & tools should be used for projects subject to MRP 2.0 vs. MRP 3.0. For
projects subject to MRP 2.0 refer to the legacy document 7th Edition Stormwater
C.3 Guidebook and Template on the CCCWP website. For projects subject to MRP
3.0 (published May 11, 2022), and for Regulated Projects (C.3.b.) approved July 1,
2023 or later, please refer to the 9th Edition Guidebook and Template.
The Guidebook is the collective work product of the Contra Costa Clean Water
Program’s Development Committee. The Guidebook’s purpose is to facilitate the
review and approval process for Provision C.3, while also obtaining excellence in
the quality and community benefit of built projects. Development Committee
members pool the expertise they have gained from working with applicants for
development approvals, and the Committee directs updates and refinements to the
Guidebook with each new edition. Some background for various policy and technical
decisions, including submittal requirements and technical criteria for facility design,
is in Appendix E.
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S T O R M W A T E R C . 3 . C O M P L I A N C E
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Policies and Procedures
Determine if your development project must comply with the
Municipal Regional Permit Provision C.3 requirements. Review
the steps to compliance.
Thresholds, Effective Dates, and Requirements
Table 1-1 (on page 7) summarizes requirements for parcel-based development
projects. Thresholds are based on the sum of impervious area created or replaced
in connection with a project.
The following are included in that sum:
Removing and replacing pavement to the top of the base course or
lower—or repairing pavement base.
Laying gravel over dirt or installing pavement over existing gravel.
The following may be excluded:
Interior remodels and routine maintenance or repair such as replacement
of a roof or exterior wall surface.
Pavement overlay of pavement, or adding gravel to a gravel road, within
the existing footprint.
Pervious pavements constructed to the criteria in this Guidebook.
Swimming pools and other features that overflow and drain to the
sanitary sewer.
ʇ THE “50% RULE” FOR PROJECTS ON PREVIOUSLY DEVELOPED SITES
Projects on previously developed sites may also need to retrofit drainage to provide
treatment of runoff from all impervious areas of the entire site. For sites creating
Chapter 1
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or replacing a total area of impervious surface greater than the applicable threshold
(Table 1-1):
If the new project results in an alteration of more than 50% of the
impervious surface of a previously existing development, and the existing
development was not subject to stormwater treatment measures, then
the entire project must be included in the treatment measure design.
If the new project results in an alteration of less than 50% of the
impervious surface of a previously existing development, and the existing
development was not subject to stormwater treatment measures, then
only the new and replaced impervious surface must be included in the
treatment system design.
Municipal staff will determine case-by-case when and how the “50% rule” applies.
Staff may use the original entitlement (discretionary approval) or approved building
plans as a guide when calculating the impervious area of the previously existing
development.
C H A P T E R 1 : P O L I C I E S A N D P R O C E D U R E S
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TABLE 1-1. THRESHOLDS AND REQUIREMENTS FOR PARCEL-BASED
PROJECTS
Impervious Area Threshold Requirement
No
n
-
R
e
g
u
l
a
t
e
d
P
r
o
j
e
c
t
s
All projects requiring municipal
approvals or permits (including
single-family residences)
As encouraged or directed by local staff, preserve or restore
open space, riparian areas, and wetlands as project amenities;
minimize land disturbance and impervious surfaces (especially
parking lots); cluster structures and pavements; include micro-
detention in landscaped and other areas; and direct runoff to
vegetated areas. Use Bay-friendly landscaping features and
techniques. Include Source Controls specified in Appendix D.
Projects creating or replacing
more than 2,500 to
5,000 square feet of impervious
surface that are not Regulated
Projects
Using the template in Appendix C, prepare and submit a
Stormwater Control Plan for a Small Land Development
Project. Implement one or more of the following measures:
(1) Direct roof runoff into cisterns or rain barrels for reuse if
allowed by your municipality; (2) direct roof runoff onto
vegetated areas; (3) Direct runoff from sidewalks, walkways,
and/or patios onto vegetated areas; (4) direct runoff from
driveways and/or uncovered parking lots onto vegetated areas;
(5) Construct sidewalks, walkways and/or patios with
permeable surfaces or; (6) construct bike lanes, driveways,
and/or uncovered parking lots with permeable surfaces.
Re
g
u
l
a
t
e
d
P
r
o
j
e
c
t
s
One single-family home, not
part of a larger plan of
development, creating or
replacing 10,000 square feet
of impervious surface
Prepare and submit a Stormwater Control Plan as described in
Chapter 2, including features and facilities to ensure runoff is
treated before leaving the site. Use the Low Impact
Development (LID) Design Guide in Chapter 3 and the design
criteria in Chapter 4, including sizing factors and criteria for
“treatment only.” All other projects creating or
replacing between 5,000 square
feet and one acre of impervious
surface (10,000 square feet for
projects approved before
7/1/2023)
Projects creating or replacing
an acre or more of impervious
surface, unless exempted. See
text.
Design LID features and facilities for hydromodification
management (HM) as well as stormwater treatment. Prepare
and submit a Stormwater Control Plan as described in
Chapter 2 and use the LID Design Guide in Chapter 3,
including the sizing factors and criteria for “treatment and
HM.” See Appendix E for additional information.
1 Summary only. Requirements for your project are determined by your municipality.
2 Thresholds in bold apply to projects approved beginning 7/1/2023.
C.3 Applicability and Entitlements
Provision C.3 compliance must be demonstrated at the time of application for a
development project, including rezoning, tentative map, parcel map, conditional use
permit, variance, site development review, design review, development agreement,
or building permit.
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All Regulated Projects require a Stormwater Control Plan showing the location and
footprint of proposed impervious surfaces and of proposed stormwater facilities,
and a description of how runoff will flow from impervious surfaces to the facilities.
Instructions for preparing a Stormwater Control Plan are in Chapter 2.
ʇ DEFINITION OF A “PROJECT”
When determining which Provision C.3 requirements apply, a “project” should be
defined consistent with California Environmental Quality Act (CEQA) definitions
of “project.” Specifically, the “project” is the whole of an action that has the
potential for adding or replacing, or resulting in the addition or replacement, of
roofs, pavement, or other impervious surfaces and thereby resulting in increased
flows and runoff pollutants. “Whole of an action” means the project may not be
segmented or piecemealed into smaller parts if the effect is to reduce the quantity
of impervious area for any part to below the C.3 threshold.
The C.3 project scope includes any impervious surfaces added or replaced within
the public right-of-way in connection with the project.
ʇ GRANDFATHERING
Regulated Projects approved prior to July 1, 2023 which have approved Stormwater
Control Plans may be issued building permits and allowed to proceed. Regulated
Projects with vesting tentative maps, regardless of the date of map approval, may
be issued building permits to proceed with development in substantial compliance
with the ordinance, policies, and standards in effect at the time the vesting tentative
map was approved or conditionally approved, in accordance with California law.
This “grandfathering” applies only to the specific discretionary approval that was
the subject of the original application. Subsequent applications for further approvals
constitute a project for the purposes of C.3. If those subsequent approvals or
entitlements cover specific locations, modes, or designs for addition or replacement
of roofs, pavement, or other impervious surfaces, and if the impervious area created
or replaced is in excess of the applicable thresholds, then the C.3 requirements will
apply to those areas of the project covered by the subsequent approval or
entitlement.
For example, an application for a subdivision tentative map which received final
discretionary approval prior to the C.3 start dates may be exempt from Provision
C.3. However, if the project proponent later applies for discretionary approval, then
C.3 requirements would apply to those improvements.
ʇ PROVISION C.3 COMPLIANCE REQUIREMENTS FOR SUBDIVISION MAPS
Your drainage design will determine where stormwater treatment facilities will be
constructed. Note that stormwater treatment facilities should not be located on
individual single-family residential lots. This is especially important when the
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facilities will manage runoff from other lots, from streets, or from common areas.
Facility landowners will be responsible for facility maintenance. See Chapter 5.
For typical subdivisions, it works best to drain individual lots to the common street,
and then drain the street to treatment facilities located within the private street right-
of-way or on one or more separate, jointly owned parcels.
Your team should complete a preliminary drainage design before making final the
right-of-way of internal streets and before sketching parcel lines. Each stormwater
treatment facility footprint must have a corresponding easement to restrict
future building of structures at the facility location.
Applications for tentative maps may be required to include the following:
Delineation of separate parcels upon which stormwater facilities will be
located.
Dedication of easements and inclusion of provisions related to provision
C.3 compliance.
Execution of, or commitment to execute later, a covenant running with
the land and agreement for residents of the subdivision to operate and
maintain stormwater facilities.
Conditions, Covenants, and Restrictions (CC&Rs) recorded against the
subdivision to establish reciprocal obligations of the lot owners to
maintain stormwater facilities.
If a tentative map approval would potentially entitle future owners of individual
parcels to construct new or replaced impervious area which, in aggregate, could
exceed the thresholds in Table 1-1, then the applicant must take steps to ensure C.3
requirements can and will be implemented as the subdivision is built out.
If the tentative map application does not include plans for site improvements, the
applicant should nevertheless identify the type, size, location, and final ownership
of stormwater treatment and flow-control facilities adequate to serve new roadways
and any common areas, and to also manage runoff from an expected reasonable
estimate of the square footage of future roofs, driveways, and other impervious
surfaces on each individual lot. The municipality may condition approval of the map
on implementation of stormwater treatment measures in compliance with Provision
C.3 when construction occurs on the individual lots. This condition may be
enforced by a grant deed of development rights or by a development agreement.
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If a municipality deems it necessary, the future impervious
area of one or more lots may be limited by a deed
restriction. This might be necessary when a project is
exempt from one or all C.3 provisions because the total
impervious area is below a threshold, or to ensure runoff
from impervious areas added after the project is approved
does not overload a stormwater treatment and flow-
control facility.
See the Policy for C.3 Compliance for Subdivisions on the CCCWP’s C.3 web page. After
consulting with local planning staff, applicants for subdivision approvals will
propose one of the following four options, depending on project characteristics and
local policies:
1. Show that the sum of future impervious areas to be created or replaced
on all parcels could not exceed the applicable C.3 thresholds shown in
Table 1-1.
2. Show that, for every lot, the intended use can be achieved with a design
which disperses runoff from roofs, driveways, streets, and other
impervious areas to self-retaining pervious areas, using the criteria in
Chapter 3 of this Guidebook.
3. Prepare improvement plans showing drainage to treatment and/or
flow-control facilities designed in accordance with this Guidebook and
commit to constructing the facilities prior to transferring the lots.
4. Prepare improvement plans showing drainage to treatment and/or
flow-control facilities designed in accordance with this Guidebook and
provide appropriate legal instruments to ensure the proposed facilities
will be constructed and maintained by subsequent owners.
For the option selected, municipal staff will determine the appropriate conditions
of approval, easements, deed restrictions, or other legal instruments necessary to
ensure future compliance. When new streets and common areas are constructed,
facilities to treat runoff from those new impervious areas must be constructed
concurrently, and agreements for the operation and maintenance of those facilities
must be executed timely.
ʇ PHASED PROJECTS
As part of an application for approval of a phased development project, a
conceptual or master Stormwater Control Plan which describes and illustrates, in
broad outline, how the drainage for the project will comply with the Provision C.3
requirements should be provided. The level of detail in the conceptual or master
Stormwater Control Plan shall be consistent with the scope and level of detail of
Local Requirements:
Cities, towns, or the County
may have requirements that
differ from, or are in addition
to, this countywide Guidebook.
See Appendix A for local
requirements.
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the development approval being considered. The conceptual or master Stormwater
Control Plan should specify that a more detailed Stormwater Control Plan for each
later phase or portion of the project will be submitted with subsequent applications
for discretionary approvals.
Projects in Public Roads or Right-of-Way
Work within the public right-of-way that is part of a parcel-based project is included
in the sum of impervious area created or replaced. For example, the following
frontage improvements are included in the sum of impervious area:
Removal or replacement of curb or sidewalk,
Removal or replacement of roadway pavement to the top of the base
course or lower,
Construction of a new public street, or
Paving of an existing dirt or gravel roadway.
For projects entirely within the public right-of-way, Regulated Project thresholds
are shown in Table 1-2.
Hydromodification Management Requirements
As shown in Table 1-1 on page 7, in addition to incorporating treatment controls,
projects creating or replacing 1 acre or more of impervious area—unless
exempted—must ensure post-project runoff does not exceed estimated pre-project
TABLE 1-2. THRESHOLDS FOR PUBLIC ROAD AND TRAIL PROJECTS
Impervious Area
Threshold
Project Types
5,000 square feet
contiguous1
New roads, including sidewalks and bike lanes
Adding traffic lanes to an existing road
New stand-alone trail projects 10 feet wide or wider
Sidewalk gap closures, sidewalk replacement, Americans with Disabilities
Act (ADA) curb ramps
One acre
contiguous2
Removing/replacing asphalt or concrete to top of base course or lower
Repair of pavement base
Extending pavement edge (e.g., safety improvement, paving gravel shoulder)
Utility trenching projects 8 feet wide or wider
1 For projects approved prior to 7/1/2023, the threshold is 10,000 square feet contiguous.
2 Pro ects a roved rior to 7 1 2023 are exem t.
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rates and durations in a way that could potentially accelerate stream erosion.
Additional information on hydromodification management (HM) is in Appendix E.
ʇ EXEMPTIONS
Per MRP 3.0 Provision C.3.g.i, projects may be exempted from HM requirements
if any of the following apply:
The project is not located in an area of HM applicability on the HM
Applicability Map located on CCCWP’s website.
The post-project impervious area is less than, or the same as, the pre-
project impervious area. (At the discretion of municipal staff, on HM
projects applicants may provide treatment-only controls for an
impervious square footage that is less than or equal to the pre-project
impervious square footage. See Appendix E).
ʇ SITES THAT ARE ALREADY PARTIALLY DEVELOPED
At the discretion of municipal staff, applicants with HM projects may provide
treatment-only controls for an impervious square footage that is less than or equal
to the pre-project impervious square footage. Treatment and HM controls must be
provided for the remaining impervious square footage.
ʇ COMPLIANCE WITH HM REQUIREMENTS
Projects subject to the HM requirements must use the LID Design Guide in
Chapter 3 and the criteria in Chapter 4 to develop a design that meets both
treatment and HM requirements.
For a compliant and/or efficient LID design for HM:
Drain only impervious areas to bioretention or other treatment/HM
facilities.
Use self-treating areas and self-retaining areas to manage runoff from
landscaped areas.
Wherever possible, disperse runoff from impervious areas to landscaped
areas.
If the required footprint for a bioretention facility seems too large,
consider using the cistern and bioretention or bioretention and vault
options.
See the Design Guide in Chapter 3.
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ʇ HM REQUIREMENTS - RECENT UPDATE
CCCWP recently went through the process of identifying, analyzing, and comparing
options for HM implementation in compliance with Provision C.3.g. Applicants for
development projects subject to HM requirements are now required to use BAHM
to demonstrate HM compliance. Detailed direction on this new HM compliance
methodology and pathway are discussed in Chapter 3.
Offsite Compliance Options for Runoff Treatment
Experience has shown that LID features and facilities, distributed throughout the
site and designed using the guidance in Chapter 3, are feasible on nearly all
development sites. However, in lieu of incorporating facilities to treat runoff from
impervious areas at the development project site, an applicant may propose a
secondary project that will treat runoff from an equivalent amount of existing
impervious surface area with LID (i.e., retrofit with LID) at another location
within the same watershed.
To be considered, the secondary project must include construction, operation, and
maintenance of facilities that meet the criteria in Chapter 3. Those facilities must
treat runoff from an amount of impervious surface equivalent to, or greater than,
the impervious surface that would be subject to requirements at the project location.
An applicant may propose to combine onsite and offsite facilities to add up to the
equivalent amount of impervious area as would be required for only onsite
treatment. Drainage from equivalent existing impervious square footage not
subject to C.3 requirements, including existing impervious square footage on
the same parcel* or on an adjacent parcel or public or private street within the
same watershed, may be retrofitted with LID and the retrofit drainage square
footage used to offset new or replaced impervious square footage that would
be difficult or expensive to route to treatment.
An applicant may also propose to share in a larger project and be credited for a
proportional amount of the impervious area for which runoff is treated by that
project.
Consideration or acceptance of such proposals is at the discretion of the local
municipality.
* Excluding existing impervious square footage subject to the 50% rule.
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S T O R M W A T E R C . 3 . C O M P L I A N C E
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Preparing A Stormwater Control Plan
Step-by-step documentation of compliance for Regulated Projects
our Stormwater Control Plan for a Regulated Project will demonstrate your
project complies with all applicable requirements in MRP 3.0 to:
minimize imperviousness and reduce runoff,
slow runoff rates and retain or detain stormwater,
incorporate required source controls,
treat stormwater prior to discharge from the site,
control runoff rates and durations if required, and
provide for operation and maintenance of stormwater facilities.
The Stormwater Control Plan must be submitted with your application for
discretionary approval and must have sufficient detail to ensure the stormwater
design, site plan, and landscaping plan are congruent.
A complete and thorough Stormwater Control Plan will facilitate quicker review
and fewer cycles of review. Every Contra Costa municipality requires a Stormwater
Control Plan for every applicable project.
Your Stormwater Control Plan will consist of a report and an exhibit.
Municipal staff may use the checklist on the following page to evaluate your
Stormwater Control Plan.
Chapter 2
Y
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STORMWATER CONTROL PLAN CHECKLIST
CONTENTS OF EXHIBIT
Show the following on drawings:
Existing natural hydrologic features (depressions, watercourses, relatively undisturbed areas) and significant natural
resources.
Existing and proposed site drainage network and connections to drainage off site.
Layout of buildings, pavement, and landscaped areas.
Impervious areas proposed (including roofs, plazas, sidewalks, and streets/parking) and area of each.
Entire site divided into separate Drainage Management Areas (DMA), with each DMA identified as self-treating,
self-retaining (zero-discharge), draining to a self-retaining area, or draining to an Integrated Management Practice
(IMP). Each DMA has one surface type (roof, paving, or landscape), is labeled, and square footage noted.
Locations, footprints, square footage, and top of soil elevation of proposed treatment and flow-control facilities.
Potential pollutant source areas, including refuse areas, outdoor work and storage areas, etc. and corresponding
required source controls listed in Appendix D.
CONTENTS OF REPORT
Include the following in a report:
Narrative analysis or description of site features and conditions that constrain or provide opportunities for
stormwater control. Include soil types (including Hydrologic Soil Group as defined by the Natural Resources
Conservation Service (NRCS), slopes, and depth to groundwater.
Narrative description of site design characteristics that protect natural resources.
Narrative description and/or tabulation of site design characteristics, building features, and pavement selections
that minimize imperviousness of the site.
Tabulation of DMAs, including self-treating areas, self-retaining areas, areas draining to self-retaining areas, and
areas draining to IMPs, in the format shown in Chapter 4. Output from the IMP Sizing Calculator may be used.
Sketches and/or descriptions showing there is sufficient hydraulic head to route runoff into, through, and from
each IMP to an approved discharge point.
A table of identified pollutant sources and for each source, the source control measure(s) used to reduce pollutants
to the maximum extent practicable. See Appendix D.
General maintenance requirements for infiltration, treatment, and flow-control facilities.
Means by which facility maintenance will be financed and implemented in perpetuity.
Statement accepting responsibility for interim operation and maintenance of facilities.
Identification of any conflicts with codes or requirements or other anticipated obstacles to implementing the
Stormwater Control Plan.
Construction Plan C.3 Checklist.
Certification by a civil engineer, architect, and landscape architect.
Appendix: Compliance with flow-control requirements
(if using an HM compliance option other than the design guidance in Chapter 3).
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A template for a Stormwater Control Plan in Microsoft Word format can be found
on at the Contra Costa Clean Water Program’s C.3 web page. Follow the
instructions in this Guidebook while using the template. A Design Review Checklist
is included in Appendix G as an additional resource to the process of completing a
Stormwater Control Plan.
Project Data
The table in the Stormwater Control Plan template is shown below for
reference. The table is formatted to facilitate compilation of the municipalities’
annual reports.
TABLE 2-1. FORMAT FOR REPORTING PROJECT DATA
Project Name/Number
Application Submittal Date [to be verified by municipal staff]
Project Location [Street Address if available, or intersection
and/or Assessor’s Parcel Number]
Name of Developer
Project Phase No. [If project is being constructed in phases,
indicate the phase number. If not, enter “NA”]
Project Type and Description [Example entries: “5-story office building,”
“Residential with 160 single-family homes with
five 4-story buildings to contain 200
condominiums,” “100-unit, 2-story shopping
mall,” “mixed use retail and residential
development (apartments)”, “Industrial
warehouse.”]
Project Watershed [Request from municipal staff]
Total Project Site Area (acres)
Total Area of Land Disturbed (acres)
Total New Impervious Surface Area (square
feet [ft2])
Total Replaced Impervious Surface Area (ft2)
Total Pre-Project Impervious Surface Area
(ft2)
Total Post-Project Impervious Surface Area
(ft2)
50% Rule[*] [Applies or Doesn’t Apply]
Project Density [State dwelling units per acre and/or Floor
Area Ratio]
Applicable Special Project Categories
[Complete even if all treatment is Low
Impact Development (LID)]
[State A, B, C, or none. If “C”, state basis for
affordable housing, location, density, and
parking credits.]
Percent LID and non-LID treatment [State totals for project and provide details
under “Documentation of Drainage Design.”]
Hydromodification Management (HM)
Compliance [†]
State “applies” or explain reason for
exemption.
* 50% rule applies if: Total Replaced Impervious Surface Area > 0.5 × Pre-Project Impervious Surface Area
† +0DSSOLHVLI 7RWDO1HZ,PSHUYLRXV6XUIDFH$UHD7RWDO5HSODFHG,PSHUYLRXV6XUIDFH$UHD DFUHXQOHVV
exem t. See a e 5.
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To determine the replaced impervious surface area,
it is necessary to overlay a drawing of the existing,
pre-project impervious areas with the proposed site
plan and evaluate the square footage of existing
impervious areas that will be covered with new
impervious surfaces. See the example in Figure 2-1.
Setting
Prepare a brief narrative placing the project in
context. Discuss, as appropriate, the site location,
division of parcels, planned land uses, zoning,
setback and open space requirements, project
phasing, number of residential units or square
footage of office or retail, parking requirements,
neighborhood character, project design objectives
(for example, Leadership in Energy and
Environmental Design [LEED] certification), and
other notable project characteristics.
Include a vicinity map.
Existing Features and Site Conditions
In a well-organized narrative, describe:
Project site size, shape, and existing topography, including the general
direction of surface drainage, local high or low points or depressions, any
outcrops or other significant geologic features, and any contiguous
natural areas, wetlands, watercourses, seeps, or springs.
Existing land use and current or proposed zoning, including
requirements for setbacks and open space.
Soil types (including hydrologic soil groups as defined by Natural
Resources Conservation Service [NRCS]) and depth to groundwater.
Existing and proposed site drainage, including connections to the
municipal storm drain system. Describe any drainage from adjacent areas
that runs on to the project area.
Existing vegetative cover and impervious areas, if any.
FIGURE 2-1.ILLUSTRATION OF REPLACED
IMPERVIOUS AREA. The proposed building replaces
impervious area on the existing parking lot. It also creates new
impervious area. To complete the Project Data Table, measure,
calculate, and enter the total new impervious area, total replaced
impervious area, the pre-project impervious area, and the post-
project impervious area.
New
Impervious
Area
Replaced
Impervious
Area
Parking
Lot New Building
and Garage
Existing Proposed
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Identify Constraints & Opportunities
Review the information compiled in Step 1. Identify the principal constraints on
site design and selection of treatment and flow-control facilities as well as
opportunities to reduce imperviousness and incorporate facilities into the site and
landscape design. For example, constraints might include impermeable soils, high
groundwater, groundwater pollution or contaminated soils, steep slopes,
geotechnical instability, high-intensity land use, heavy pedestrian or vehicular traffic,
utility locations, or safety concerns. Opportunities might include existing natural
areas, low areas, oddly configured or otherwise unbuildable parcels, easements and
landscape amenities including open space and buffers (which can double as
locations for bioretention facilities), and differences in elevation (which can provide
hydraulic head).
In your narrative, describe site opportunities and constraints. This narrative will help
you as you proceed with LID design and explain your design decisions to others.
Low Impact Development Design Strategies
Use the Low Impact Development Design Guide (Chapter 3) to analyze your
project for LID, design and document drainage, and specify preliminary design
details for integrated management practices.
After analyzing your project for LID (see page 28), prepare a narrative overview of
your design and how your design decisions:
Optimize the site layout,
Use pervious surfaces where appropriate,
Disperse runoff to pervious (self-retaining) areas, and
Drain impervious surfaces to bioretention facilities or other integrated
management practices (IMPs).
Documentation of Drainage Design
Chapter 3 includes calculation procedures and instructions for using the IMP Sizing
Calculator to organize and present your calculations.
As shown in the checklist (page 16), your Exhibit must show the entire site divided
into separate Drainage Management Areas (DMAs), with each area identified as one
of the following:
1. SELF-TREATING AREA
2. SELF-RETAINING AREA
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3. AREA DRAINING TO A SELF-RETAINING AREA, OR
4. AREA DRAINING TO AN IMP.
Each Drainage Management Area must be clearly marked with a unique
identifier along with the types and square footage of any impervious surfaces.
Proposed location, size, and approximate top of soil elevation (TSL) of each
treatment and flow-control facility must also be indicated on the exhibit. Each
facility should be clearly marked with a unique identifier.
It is best to use the grading plan (screened) as background for the Exhibit. It may
also be appropriate to show portions of the roofing plan (also screened) wherever
roof ridges define DMAs.
Your Stormwater Control Plan report must include:
Tabulation of proposed self-treating areas, self-retaining areas, areas
draining to self-retaining areas, and areas draining to IMPs, with the
corresponding IMPs identified on the Exhibit.
Complete output from the IMP Sizing Calculator, showing the minimum
square footage required and proposed square footage for each IMP.
If flow-control requirements apply, the required storage volume or
volumes, and the diameters of each underdrain orifice, must also be
shown (sized using BAHM – see Chapter 3).
Your Stormwater Control Plan must also include preliminary design information
for each bioretention facility or other IMP. Depending on the complexity of the
project and the stage of the design, reviewers may expect to see renderings or details,
in plan and/or cross-section, showing how the IMPs will be integrated into the site.
This may include transitions between the flat, planted surface of bioretention
facilities and the adjacent buildings, roadways, sidewalks, or landscapes, and planting
plans consistent with the active or inactive uses of the planted bioretention area.
For submittals that include preliminary or final construction drawings, plan views,
cross-sections, and other details must be consistent with the design criteria in this
Guidebook. See Chapter 4 for “What to Show on Construction Plans” and for design
guidance and design criteria.
Also include in your Stormwater Control Plan report:
A narrative briefly describing each DMA, its drainage, and where
drainage will be directed.
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A narrative briefly describing each IMP. Include any special
characteristics or features distinct from the design sheets in Chapter 3.
Group and consolidate descriptions, or provide additional detail, as necessary to
help the reviewer understand your drainage design.
Source Control Measures
Some everyday activities – such as trash recycling/disposal and washing vehicles
and equipment – generate pollutants that tend to find their way into storm drains.
These pollutants can be minimized by applying source control BMPs.
Source control BMPs include permanent, structural features that may be required
in your project plans—such as roofs over and berms around trash and recycling
areas—and operational BMPs, such as regular sweeping and “housekeeping,” that
must be implemented by the site’s occupant or user.
Use the following procedure to specify source control BMPs for your site:
1. Identify Pollutant Sources: Review the first column in the Pollutant
Sources/Source Control Checklist (Appendix D). Check off the potential
sources of pollutants that apply to your site.
2. Note Locations on Stormwater Control Plan Exhibit: Note the
corresponding requirements listed in Column 2 of the Pollutant Sources/
Source Control Checklist (Appendix D). Show the location of each
pollutant source and each permanent source control BMP in your
Stormwater Control Plan Exhibit.
3. Prepare a Table and Narrative: Check off the corresponding requirements
listed in Column 3 in the Pollutant Sources/Source Control Checklist
(Appendix D). Create a table using the format in Table 2-2 on the following
page. In the left column, list each potential source on your site (from
Appendix D, Column 1). In the middle column, list the corresponding
permanent, structural BMPs (from Columns 2 and 3, Appendix D) used to
prevent pollutants from entering runoff. Accompany this table with a
narrative that explains any special features, materials, or methods of
construction that will be used to implement these permanent, structural
BMPs.
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4. Identify Operational Source Control BMPs. To complete your table, refer
once again to the Pollutant Sources/Source Control Checklist (Appendix D,
Column 4). List in the right column of your table the operational BMPs that
should be implemented as long as the anticipated activities continue at the
site. The local stormwater ordinance requires that these BMPs be
implemented; the same BMPs may also be required as a condition of a use
permit or other revocable discretionary approval for use of the site.
ʇ REFERENCES AND RESOURCES:
Appendix D, Stormwater Pollutant Sources/Source Control Checklist
Municipal Regional Permit Provision C.3.c.
Bay-Friendly Landscape Guidelines (Stopwaste.org, 2008)
https://basmaa.org/wp-content/uploads/2021/04/basmaa_start-at-the-source-site-design-guidance-manual_1999.pdf Section 6.7:
Details, Outdoor Work Areas
Stormwater Facility Maintenance
As required by MRP 3.0 Provision C.3.h, your local municipality will periodically
verify that treatment and flow-control facilities on your site are maintained and
continue to operate as designed.
To make this possible, your municipality will require that you include in your
Stormwater Control Plan:
1. A means to finance and implement facility maintenance in perpetuity.
2. Acceptance of responsibility for maintenance from the time the facilities
are constructed until responsibility for operation and maintenance is
legally transferred. A warranty covering a period following construction
may also be required. Check with your local municipality for warranty
requirements.
3. An outline of general maintenance requirements for the treatment and
flow-control facilities you have selected.
TABLE 2-2. FORMAT FOR TABLE OF PERMANENT AND OPERATIONAL SOURCE
CONTROL MEASURES
Potential source of
runoff pollutants
Permanent
source control BMPs
Operational
source control BMPs
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Your local municipality will also require that you prepare and submit a detailed
Stormwater Facilities Operation and Maintenance Plan that sets forth a
maintenance schedule for each of the treatment and flow-control facilities built on
your site. An agreement assigning responsibility for maintenance and providing for
inspections and certification may also be required.
Details of these requirements, and instructions for preparing a Stormwater Facilities
Operation and Maintenance Plan, are in Chapter 5.
ʇ REFERENCES AND RESOURCES:
Chapter 5
Model Stormwater Ordinance (CCCWP, 2013)
Model Operation and Maintenance Agreements
Construction Plan C.3 Checklist
When you submit construction plans for City review and approval, the plan checker
will compare that submittal with your Stormwater Control Plan. By creating a
Construction Plan C.3 Checklist for your project, you will facilitate the plan
checker’s comparison and speed review of your project by completing the following
steps:
1. Create a table similar to Table 2-3 below. Number and list each measure
or BMP you have specified in your Stormwater Control Plan in
Columns 1 and 2 of the table. Leave Column 3 blank. Incorporate the
table into your Stormwater Control Plan.
2. When you submit construction plans, duplicate the table (by
photocopy or electronically). Now fill in Column 3, identifying the plan
sheets where the BMPs are shown. List all plan sheets on which the
BMP appears. Submit the updated table with your construction plans.
Note that the updated table—or Construction Plan C.3 Checklist—is only a
reference tool to facilitate comparison of the construction plans to your Stormwater
Control Plan. Local municipal staff can advise you regarding the process required
to propose changes to the approved Stormwater Control Plan.
TABLE 2-3. FORMAT FOR CONSTRUCTION PLAN C.3 CHECKLIST
Stormwater Control Plan
Page # BMP Description See Plan Sheet #s
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See Chapter 3 for details of IMP construction to be included in construction plans.
Certification
Your local municipality may require that your Stormwater Control Plan be certified
by an architect, landscape architect, or civil engineer. See Appendix A.
Your certification should state: “The selection, sizing, and preliminary design of
stormwater treatment and other control measures in this plan meet the requirements
of Regional Water Quality Control Board Order R2-2022-0018.”
Stormwater Control Plan Report Sample Outline
I. Project Data (table)
II. Setting
A. Project Name, Location, Description
B. Existing Site Features and Conditions
C. Opportunities and Constraints for Stormwater Control
III. Low Impact Development Design Strategies
A. Optimization of site layout
(1) Limitation of development envelope
(2) Preservation of natural drainage features
(3) Setbacks from creeks, wetlands, and riparian habitats
(4) Minimization of imperviousness
(5) Use of drainage as a design element
B. Use of Permeable Pavements
C. Dispersal of Runoff to Pervious (Self-Retaining) Areas
D. Integrated Management Practices
IV. Documentation of Drainage Design
A. Description of each Drainage Management Area
B. Tabulation and Sizing Calculations
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V. Source Control Measures
A. Description of site activities and potential sources of pollutants
B. Table showing sources, permanent source controls, and operational
source controls
C. Features, Materials, and Construction of Source Control BMPs
VI. Stormwater Facility Maintenance
A. Ownership and responsibility for maintenance in perpetuity
(1) Commitment to execute any necessary agreements and/or annex
into a fee mechanism, per local requirements
(2) Statement accepting responsibility for operation and maintenance
of facilities until that responsibility is formally transferred
B. Summary of maintenance requirements for each stormwater facility
VII. Construction Plan C.3 Checklist
VIII. Certifications
Attachment: Stormwater Control Plan Exhibit
Appendix: Compliance with Flow-Control (Hydrograph Modification)
requirements
Stormwater Control Plan Template
A template with the above format and headings is available on the CCCWP website.
Example Stormwater Control Plans
Example Stormwater Control Plans are available on the CCCWP website.
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Low Impact Development Site
Design Guide
Guidance for designing your site to include LID site
drainage, stormwater treatment facilities, and HM facilities,
and for documenting your site’s compliance
ow Impact Development aims to mimic pre-development hydrology by
directing runoff to natural landscape features throughout the
development site that detain, disperse, infiltrate, and filter runoff.
Contra Costa municipalities require—as a condition of development approval
for Regulated Projects—installation of LID measures to treat the amount of
runoff specified in MRP 3.0.
Your Stormwater Control Plan must include an exhibit and calculations
showing site drainage and proposed LID features and facilities to meet the
criteria in this Guidebook. This will require that you delineate the entire site into
DMAs, and for each DMA, characterize the square footage, surface type, and
routing of the drainage. You will also need to show the locations, sizes, and
types of proposed stormwater treatment and HM facilities.
This may be accomplished in two steps:
1. Analyze your project and identify and select options for meeting
LID requirements and runoff treatment requirements as well as
HM requirements, if they apply. See Development Review
Checklist in Appendix E for direction on how to document
stormwater controls for development practices.
2. Design and document drainage for the whole site and document
how that design meets this Guidebook’s stormwater treatment and
HM criteria. HM applicability maps are available on CCCWP’s
website.
Chapter 3
L
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For most projects, you will need to iterate these two steps to converge on a
workable design that complements site conditions and project objectives.
Before beginning your LID design, first determine which requirements apply
to your site. See Chapter 1. Determine whether the 50% rule applies, and
whether you will need to incorporate HM. The guidance in this chapter will
enable you to size stormwater facilities (IMPs) for treatment-only or for
treatment plus HM.
Analyze Your Project for LID
Conceptually, there are four LID strategies for managing runoff from roofs and
paving:
1. Optimize the site layout by preserving natural drainage features and
designing buildings and circulation to minimize the amount of
impervious surface.
2. Use pervious surfaces such as turf, gravel, or pervious pavement,
or use surfaces that retain rainfall, such as green roofs.
3. Disperse runoff from impervious surfaces onto adjacent pervious
surfaces (e.g., direct a roof downspout to disperse runoff onto a
lawn).
4. Drain impervious surfaces to engineered IMPs, which are typically
bioretention facilities, sometimes augmented with additional
storage. Other IMPs include flow-through planters and dry wells,
which may be used in specific situations for hydromodification
management. IMPs capture stormwater runoff and reduce
downstream flows through a combination of evaporation and
transpiration, percolation through engineered soils followed by
attenuated release and/or infiltration to surrounding soils.
With forethought in design, the four LID strategies can provide multiple,
complementary benefits to your development. Pervious surfaces reduce
heat island effects and temperature extremes. Landscaping improves air
quality, creates a better place to live or work, and upgrades value for rental
or sale. Retaining natural hydrology helps preserve and enhance the natural
character of the area. LID drainage design can also conserve water and
reduce the need for drainage infrastructure.
A combination of two or more strategies may work best for your project.
Table 3-1 on the following page includes ideas for applying LID strategies
to site conditions and types of development. It may be useful as a starting
point for thinking through application of the four strategies.
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ʇ REFERENCES AND RESOURCES
Green Roofs for Stormwater Runoff Control (USEPA, 2009a)
Technical Guidance on Implementing the Stormwater Runoff Requirements for Federal Projects under Section 438 of
the Energy Independence and Security Act. (USEPA, 2009b)
Porous Pavements (Ferguson, 2005)
Green Roof Minimum Specifications (BASMAA, 2011b)
TABLE 3-1. IDEAS FOR RUNOFF MANAGEMENT
Site Features/Issues
Optimize
Site
Layout
Pervious
Pavement
Green
Roof
Disperse
Runoff to
Landscape
Bioretention
Facility
Flow-
through
Planter
Cistern +
bioretention
Bioretention +
Vault Dry Well
Clayey native soils 9 9 9 9 9 9 9
Permeable native soils 9 9 9 9 9 9 9
Very steep slopes 9 9 9
Shallow depth to
groundwater 9 9 9
Roof drainage 9 9 9 9 9 9
Parking lots 9 9 9 9 9 9
Extensive landscaping 9 9 9
Densely developed
sites with limited
space/landscape
9 9 9 9 9 9 9
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The four strategies for LID design are described in more detail below.
ʇ OPTIMIZE THE SITE LAYOUT
To minimize stormwater-related impacts, apply the following design principles
to the layout of newly developed and redeveloped sites:
Define the development envelope and protected areas, identifying
areas that are most suitable for development and areas that should
be left undisturbed.
Set back development from creeks, wetlands, and riparian habitats.
Preserve significant trees.
Where possible, conform the site layout along natural landforms,
avoid excessive grading and disturbance of vegetation and soils, and
replicate the site’s natural drainage patterns.
Concentrate development on portions of the site with less
permeable soils and preserve areas that can promote infiltration.
For all types of development, limit overall coverage of paving and
roofs. This can be accomplished by designing compact, taller
structures, narrower and shorter streets and sidewalks, smaller
parking lots (fewer stalls, smaller stalls, and more efficient lanes), and
indoor or underground parking. Examine site layout and circulation
patterns and identify areas where landscaping can be substituted for
pavement.
Use drainage as a design element. Use depressed landscape areas,
vegetated buffers, and bioretention facilities as amenities and focal
points within the site and landscape design. Bioretention facilities
can be almost any shape.
Detain and retain runoff throughout the site. On flatter sites, it
typically works best to intersperse landscaped areas and IMPs
among the buildings and paving. On hillside sites, drainage from
upper areas may be collected in conventional catch basins and piped
to landscaped areas and IMPs in lower areas. Or use low retaining
walls to create terraces that can accommodate IMPs. Wherever
possible, direct drainage from landscaped areas off site and not to
IMPs.
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ʇ USE PERVIOUS SURFACES
Green roofs are one potential strategy for using pervious surfaces in LID
design. Green roofs are growing in popularity and many have been built in the
Bay Area in the last few years. Benefits include longer roof life, lower heating
and cooling costs, and better sound insulation, in addition to air-quality and
water-quality benefits. However, initial costs are higher than for conventional
roofs, and green roofs may add to the complexity of permitting, financing, and
insuring new buildings. For C.3 compliance purposes, green roofs are
considered not to produce increased runoff or runoff pollutants (that is, any
runoff from a green roof requires no further treatment or detention) if the
media is sufficiently deep to store an inch of rainfall (typically, a 3-inch media
depth is sufficient) and also supports long-term health of vegetation. Green
roofs must be shown on site plans but may be excluded from
hydromodification and water quality sizing calculations described later in this
chapter.
Other options for using pervious surfaces in LID design are permeable, or
pervious, pavements and surface treatments. Inventory paved areas on your
preliminary site plan and identify where permeable pavements, such as crushed
aggregate, turf block, unit pavers, pervious concrete, or pervious asphalt could
be substituted for impervious concrete or asphalt paving. In clay soils, pervious
pavements require a deep base course for structural stability and may not be
cost-effective when compared to conventional pavement with drainage to
bioretention facilities. Installation of pervious pavement on slopes requires
special design features. Depending on the site, the additional costs may be
partially offset by reduced needs for drainage structures and for stormwater
treatment and HM.
ʇ DISPERSE RUNOFF TO ADJACENT PERVIOUS AREAS
Look for opportunities to direct runoff from impervious areas to adjacent
landscaping (“self-retaining” or “zero-runoff” areas). The design, including
slopes and soils, must reflect a reasonable expectation that an inch of rainfall
will soak into the soil and produce no runoff. For example, a lawn or garden
depressed 3 to 4 inches below surrounding walkways or driveways provides a
simple but functional landscape design element.
For sites subject to stormwater treatment requirements only a 2:1 maximum
ratio of impervious to self-retaining area is acceptable. Dispersal is a particularly
cost-effective strategy where HM requirements apply, but the impervious-to-
pervious ratio must be limited to 1:1. Be sure soils will drain adequately. See the
criteria for runoff reduction measures in Chapter 4. See the description of self-
retaining areas later in this chapter.
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ʇ DIRECT RUNOFF TO BIORETENTION OR OTHER IMPS
The CCCWP has developed design criteria (see Chapter 4) for the following
IMPs:
Bioretention facilities, which can be configured to integrate with
your landscape design.
Flow-through planters, which can be used on elevated plazas or
other circumstances where infiltration to native soils is not possible.
Cistern + bioretention facilities, which use an upstream storage
volume and metered flow to reduce the required square footage of
a bioretention facility or flow-through planter.
Bioretention + vault facilities, which capture a volume downstream
of bioretention and meter outflows.
Dry wells and other infiltration facilities, which can be used only
where soils are permeable. See other restrictions in Appendix E.
Table 3-4 on page 41 shows the conditions under which each IMP may be used.
Finding the right location for bioretention or other facilities on your site
involves a careful and creative integration of several factors:
Put bioretention facilities in high-visibility, well-trafficked areas and
make them a focal point in the landscape.
If the property is being subdivided now or in the future, the facility
should be in a common, accessible area. In subdivisions, it often
works best to drain roofs and driveways to the street gutter and
direct the gutter to one or more IMPs located within the common
right-of-way. Avoid locating shared facilities on private residential
lots.
Even if the facility will serve only one site owner or operator, make
sure the facility is located for ready access by inspectors from the
local municipality and the Contra Costa Mosquito and Vector
Control District.
To make the most efficient use of the site and to maximize aesthetic
value, integrate IMPs with site landscaping. Many local zoning
codes require landscape setbacks or buffers or may specify that a
minimum portion of the site be landscaped. It may be possible to
locate some or all of your site’s treatment and HM facilities within
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this same area, or within utility easements or other non-buildable
areas.
The facility must be accessible to equipment needed for its
maintenance. Bioretention facilities will typically need access for the
same types of equipment used for landscape maintenance.
Where possible, design site drainage so only impervious roofs and
pavement drain to IMPs. This yields a simpler, more efficient
drainage design with smaller IMPs, which is especially important on
projects where HM is required, and also helps protect IMPs from
becoming clogged by sediment.
Place bioretention inlet elevations and the top of the engineered soil
layer as high as possible (typically 6 to 12 inches below the
surrounding ground surface elevation). Avoid walls and steep slopes
adjacent to the bioretention soil surface. On flatter sites, keep
drainage runs short and use surface drainage (sheet flow, valley
gutters, or trench drains) to convey runoff from paved areas to the
bioretention facility.
For effective, low-maintenance operation, locate facilities so
drainage into and out of the device is by gravity flow. Because
pumped systems require more energy, more maintenance, are risk
untimely failure. Facilities with standing water can cause mosquito
control problems and municipal reviewers may decline to approve
them.
Bioretention facilities must be level all the way around, so that the
entire soil surface is wetted. Linear bioretention facilities (swales)
must be designed with their transverse sides at the same elevation.
In the linear direction, slopes must be terraced or provided with
check dams.
Bioretention facilities and other IMPs require excavations 3 or more
feet deep, which can conflict with underground utilities.
Bioretention facilities may not be combined with, located within, or integrated
with facilities for detention of flood flows. Keep bioretention facilities and
detention basins separate. See below for methods for evaluating the peak-
flow-mitigation benefit of LID features and facilities. To complete your
analysis, include in your Stormwater Control Plan a brief narrative
documenting the site layout and site design decisions you made. This will
provide background and context for how your design meets the quantitative
LID criteria.
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ʇ REFERENCES AND RESOURCES
Central Coast Low Impact Development Center
Start at the Source (BASMAA, 1999)
Urban Street Stormwater Guide (National Association of City Transportation Officials, 2017)
San Mateo Green Streets Guide (2009)
Develop and Document Your LID Drainage Design
The CCCWP’s design documentation procedure begins with careful
delineation of pervious areas and impervious areas (including roofs) throughout
the site. The procedure accounts for how runoff from each delineated DMA is
managed. For areas draining to IMPs, the procedure ensures each IMP is
appropriately sized.
This procedure is intended to facilitate, not substitute for, creative interplay
among site design, landscape design, and drainage design. Several iterations may
be needed to optimize your drainage design as well as aesthetics, circulation,
and use of available area for your site.
The CCCWP uses two tools for appropriately sizing IMPs:
1. For projects requiring HM, use the BAHM which is an HSPF-based,
continuous simulation program that models stormwater runoff and the
movement of water through IMPs using historical, local rainfall data,
and hydraulic equations that mimic the function of different LID
facilities. Please note, BAHM contains many proprietary and non-LID
stormwater management approaches that are not consistent with
CCCWP requirements. This chapter includes a crosswalk table that
summarizes the BAHM model elements that can be used to evaluate
CCCWP IMPs.
2. For projects requiring only water quality treatment, use the IMP Sizing
Calculator, which is software produced by the CCCWP to quicky and
easily facilitate the iterative calculations needed to create an optimal site
design. In addition to performing calculations, the IMP Sizing
Calculator formats the results into a summary report that can be
included with your project review submittal.
The BAHM software and user manual is available from Clear Creek Solutions:
https://www.clearcreeksolutions.info/bahm-download-page. If you are
unfamiliar with BAHM’s usage as a design aid for HM projects, please consider
attending training sessions in your area or online.
The IMP Sizing Calculator is available, along with instructions for its use, on
the CCCWP’s C.3 web page. Mean annual precipitation estimates can be found
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on Public Works Figure B-166, which is accessible from the CCCWP’s C.3 web
page.
The IMP calculator can be used to demonstrate compliance with requirements
for:
Stormwater treatment, using:
Standard sizing (applies to most development projects),
Reduced sizing (may be used, with justification, for road
reconstruction projects that follow requirements outlined in
MRP 3.0 Provision C.3.b.ii (5)(c), or that are non-regulated
projects under C.3.b),
Non-LID treatment (may be used only for qualifying projects,
with demonstration of infeasibility of LID treatment).
When using the calculator, be sure to read through
the following instructions, as they include key
information you will need for design. These
procedures and formulas can be used to
investigate, check, and verify calculations made
with the IMP Sizing Calculator.
ʇ STEP 1: DELINEATE DMAS
This is the key first step. You must divide the entire project area into
individual, discrete DMAs. Typically, lines delineating DMAs follow grade
breaks and roof ridge lines. The Exhibit, tables, text, and calculations in your
Stormwater Control Plan will illustrate, describe, and account for runoff from
each of these areas.
ʇ STEP 2: CLASSIFY DMAS AND DETERMINE RUNOFF FACTORS
Next, determine how drainage from each DMA will be handled. Each DMA
will be one of the following four types—based on the DMA’s drainage
characteristics.
1. Self-treating areas.
2. Self-retaining areas (also called “zero-discharge” areas).
3. Areas that drain to self-retaining areas.
4. Areas that drain to IMPs.
Rationale
Pollutants in rainfall and windblown dust
will tend to become entrained in the
vegetation and soils of landscaped areas,
so no additional treatment is needed. It is
assumed the self-treating landscaped
areas will produce runoff volumes and
durations less than or equal to the pre-
project site condition.
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For HM projects, runoff from self-treating areas and self-retaining areas does
not require any further treatment or HM. Areas that drain to self-retaining areas
or IMPs can be modeled directly in BAHM using the procedures described in
the BAHM user manual. For water quality treatment projects, the IMP Sizing
Calculator user guide describes how to model the four DMA types listed above.
Except for pervious pavement installations greater than 3,000 ft2 in area, there
is no requirement for operation and maintenance inspections. Additional
information about each type of DMA drainage characteristic is included on the
following pages.
#1. Self-treating areas are landscaped or turf areas that do not drain to IMPs,
but rather drain directly off site or to the storm drain system. Examples include
upslope undeveloped areas that are ditched and drained around a development
and grassed slopes that drain off site to an existing public street or storm drain.
See Figure 3-1. Self-treating areas include no impervious areas, unless the
impervious area is very small (5% or less) in relationship to the receiving
pervious area, and slopes are gentle enough to ensure runoff from impervious
areas will be absorbed into the vegetation and soil.
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FIGURE 3-1. SELF-TREATING AREAS are landscaped or turf areas that drain directly off site
or to the storm drain system.
#2. Self-retaining areas are designed to retain the first one inch of rainfall
without producing any runoff. The technique works best on flat, heavily
landscaped sites. It may be used on mild slopes if there is a reasonable
expectation that a one-inch rainfall event would produce no runoff. See
Figure 3-2.
To create self-retaining turf and landscape areas in flat areas or on terraced
slopes, berm the area or depress the grade into a concave cross-section so that
these areas will retain the first inch of rainfall. Grade slopes, if any, toward the
center of the pervious area. Inlets of area drains, if any, should be set 3 inches
above the low point to allow ponding.
Green roofs are considered self-retaining areas.
Self-treating areas drain off site
Plan
Cross-Section Convey drainage from paved area
to IMP (not shown)
Drainage from self-treating
area conveyed directly to
storm drain
Drainage from paved
area is managed separately
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Pervious pavement (e.g., crushed stone, pervious asphalt, or pervious concrete)
is self-retaining if designed and constructed according to the criteria in Chapter
4.
#3. Areas draining to self-retaining areas.Runoff from impervious or
partially pervious areas can be managed by routing it to self-retaining pervious
areas. See Figure 3-3. For example, roof downspouts can be directed to lawns,
and driveways can be sloped toward landscaped areas. The drainage from the
impervious area must be directed to and dispersed within the pervious area. If
HM requirements also apply, the self-retaining area and its tributary should be
modeled using BAHM. For water quality treatment projects, the ratio of
tributary area to self-retaining area cannot exceed 2 to 1.
FIGURE 3-3. AREAS DRAINING TO SELF-RETAINING AREAS.
The maximum ratio is two parts impervious to one part impervious, or one-to-one if HM requirements apply.FIGURE 3-2. SELF-RETAINING AREAS are depressed pervious areas that produce no runoff.
Area draining to
self-retaining area
Self-retaining area
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Designs with a larger impervious to self-retaining area ratio would be flagged
with a warning in the IMP Sizing Calculator.
Prolonged ponding is a potential problem at higher impervious/pervious ratios.
In your design, ensure that the pervious area soils can handle the additional
run-on and are sufficiently well-drained.
If pervious pavement is designed and constructed to be self-retaining—that is,
according to the criteria in Chapter 4—adjacent roofs or impervious pavement
may drain onto the pervious pavement with the same maximum ratios. For HM
projects, the tributary and permeable pavement should be modeled in BAHM
using the permeable pavement material void spaces, gravel base, etc. Consult
with a qualified engineer regarding infiltration rates, pavement stability, and
suitability for the intended traffic, especially when considering draining
impervious areas on to pervious pavement.
A partially pervious area may be drained to a self-retaining area. For example,
a driveway composed of unit pavers may drain to an adjacent lawn. In this case,
the maximum ratios are, for treatment-only sites:
FIGURE 3-3. AREAS DRAINING TO SELF-RETAINING AREAS.
The maximum ratio is two parts impervious to one part impervious, or one-to-one if HM requirements apply.
Area draining to
self-retaining area Self-retaining area
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Equation 3-1
5XQRIIIDFWRU [ WULEXWDU\DUHD [ VHOI-retaining area)
HM sites are to be modeled using BAHM.
#4. Areas draining to IMPs are used to calculate the required size of the
bioretention facility or other IMP. On densely developed sites—such as
commercial and mixed-use developments and small-lot residential
subdivisions—most DMAs will drain to IMPs.
For HM projects, IMP dimensions will be computed in BAHM. For water
quality treatment projects, the IMP Sizing Calculator computes IMP
dimensions using established sizing factors (ratios of IMP area to impervious
DMA area). Treatment-only IMPs are smaller and simpler in design.
TABLE 3-2. RUNOFF FACTORS FOR EVALUATING
DRAINAGE TO SELF-RETAINING AREAS FOR
WATER QUALITY TREATMENT ONLY PROJECTS
Surface
Treatment
only
Conventional Roof 1.0
Concrete or Asphalt 1.0
Pervious Concrete 0.1
Porous Asphalt 0.1
Grouted Unit Pavers 1.0
Solid Unit Pavers 0.2
Crushed Aggregate 0.1
Decomposed Granite* 0.1
Turfblock 0.1
Landscape 0.1
Green Roof 0.1
* with no binder, uncompacted
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More than one drainage management area can drain to the same IMP.
However, because the minimum IMP sizes are determined by ratio to drainage
area size, one drainage area may not drain to more than one IMP. See Figure 3-
4.
ʇ STEP 3: TABULATE DRAINAGE MANAGEMENT AREAS
Prepare a table of DMAs, using the format in Table 3-3, and include it in
your Stormwater Control Plan. Proceed to Step 4 to check that the IMPs
can be sized to fit your preliminary site plan.
FIGURE 3-4. DELINEATE EACH SURFACE AS A SEPARATE DMA.
(a) More than one DMA can drain to an IMP. (b) If another IMP is added, divide the DMAs as necessary so that
each DMA drains to only one IMP.
DMA-2 (Roof)
DMA-1 (Landscape)
DMA-2 (Roof)
DMA-3 (Paving)
IMP-A
DMA-3 (Roof)
DMA-1 (Landscape)
DMA-4
(Landscape)
DMA-5 (Paving)
IMP-A
IMP-B
(a) (b)
TABLE 3-3.FORMAT FOR TABULATION OF DRAINAGE MANAGEMENT
AREAS
DMA Name DMA Type Description Area (square feet)
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ʇ STEP 4: SELECT AND LAY OUT IMPS ON SITE PLAN
Select from the IMPs in Table 3-4. Note that flow-through planters may be
used only on elevated plazas, adjacent to building foundations, and other
locations where it is not feasible to allow the facility to infiltrate to underlying
soil.
Descriptions, illustrations, designs, and design criteria for the IMPs are in
Chapter 4. Once you have laid out the IMPs, calculate the square footage you
have set aside on your site plan for each IMP.
ʇ STEP 5: CALCULATE MINIMUM IMP AREA AND VOLUMES
Most projects are for treatment only, and standard sizing criteria apply. The
minimum IMP areas and volumes are determined by summing up the
contributions of each tributary DMA and multiplying times the factors shown
in Table 3-5.
Note that the minimum areas are the wetted area and do not include side
slopes.
TABLE 3-4. IMP SELECTION
Treatment Only Treatment +
Flow Control
Hydrologic Soil Group A B C/D A B C/D
Bioretention 9 9 9 9 9 9
Flow-through Planter 9 9 9 9
Dry Well 9 9 9 9
Cistern + Bioretention 9 9 9
Bioretention + Vault 9 9 9
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Tree-box-type high-flowrate biofilters and vault-based high-flowrate media
filters may be used on portions of a project only for projects that meet the
criteria on Non-LID Special Projects, as described later in this chapter,
including a demonstration that it is infeasible to use LID to treat 100% of
runoff.
For treatment-and-HM, the minimum area and minimum storage volumes
are to be calculated using the BAHM software. Please see the BAHM user
manual for detailed modeling instructions. A worked example for a project
requiring HM, using BAHM is provided in Appendix H.
IMPs installed in C/D soils will require a flow control orifice to meet HM flow
duration control performance criteria. The designer/modeler should size the
flow control orifice so that its hydraulic capacity approximates one-tenth of the
two-year pre-project flow rate (0.1Q2). This approach results in more efficient
IMP sizing.
The 0.1Q2 flow rate can be estimated from the BAHM summary report for
pre-project conditions as part of the iterative design process. The orifice
equation (Eqs. 3-18, 3-19) should then be used to determine an initial orifice
diameter when conducting iterative BAHM simulations to optimize IMP sizing
and achieve flow duration control.
Equation 3-18
Where:
Cd is the orifice coefficient of 0.6
H is the maximum saturated water level above the orifice in feet
0.1Q2 is the pre-project flow rate determined in BAHM
TABLE 3-5. MINIMUM IMP AREAS AND VOLUMES FOR TREATMENT ONLY
Hydrologic Soil Group A B C D
Bioretention Facility
Area 0.04 0.04 0.04 0.04
Flow-through Planter
Area 0.04 0.04 0.04 0.04
Dry Well (treatment only)
Area 0.02 0.04 N/A N/A
Volume 0.068 0.136 N/A N/A
Area = ft2 of IMP footprint per ft2 of impervious tributary area (unitless)
Volume = ft3 per ft2 of tributary area (ft.)
Apply runoff factors from Table 3-2 for landscape or other pervious surfaces.
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Equation 3-19
Where the orifice area is expressed in feet.
ʇ STEP 6: DETERMINE IF IMP AREA AND VOLUME ARE ADEQUATE
Sizing and configuring IMPs may be an iterative process. After computing the
minimum IMP area using Steps 1 through 5, review the site plan to determine
if the reserved IMP area is sufficient.
If so, the planned IMPs will meet the Provision C.3 sizing requirements. If not,
revise the plan accordingly. Revisions may include:
Reducing the overall imperviousness of the project site.
Changing the grading and drainage to redirect some runoff toward
other IMPs which may have excess capacity.
Making tributary landscaped DMAs self-treating or self-retaining
(may require changes to grading).
Expanding IMP surface area.
Using a different IMP. The cistern + bioretention and bioretention
+ vault options were created to achieve HM in a smaller footprint
than bioretention alone. Note these options are more costly and
complex to build and operate.
Revisions to square footage of an IMP typically require a corresponding
revision to the square footage of the surrounding or adjacent DMA.
ʇ STEP 7: PRESENT IMP SIZING CALCULATIONS
Review the output from the IMP Sizing Calculator. Coordinate and cross-check
your presentation of DMAs and calculation of minimum IMP sizes with the
Stormwater Control Plan Exhibit (labeled to show delineation of DMAs and
locations of IMPs) and with your Stormwater Control Plan report, which
should incorporate a brief description of each DMA and each IMP.
Tabulate and sum the total area of all DMAs and IMPs listed and show it is
equal to the total project area. This step will include adjusting the square footage
of some DMAs to account for area used for IMPs. Note the minimum square
footage for IMPs does not include the area of transitions or slopes adjacent
to the IMP.
S
AreaOrificeinchesinDiameterOrificeuu 412)(
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Integrating Your LID Design into Your Project
Before completing your Stormwater Control Plan exhibit and report, perform
another check to ensure your stormwater control design is fully coordinated
with the site plan, grading plan, and landscaping plan being proposed for the
site.
Information submitted and presentations to design review committees,
planning commissions, and other decision-making bodies must incorporate
relevant aspects of the stormwater design. In particular, ensure:
Curb elevations, elevations, grade breaks, and other features of the
drainage design are consistent with the delineation of DMAs.
The top edge of each bioretention facility is level all around its
perimeter—this is particularly important in parking lot medians.
The resulting grading and drainage design is consistent with the
design for parking and circulation.
Bioretention facilities and other IMPs do not create conflicts with
pedestrian access between parking and building entrances.
Vaults and utility boxes will be accommodated outside bioretention
facilities and will not be placed within bioretention facilities.
The visual impact of stormwater facilities, including planter boxes at
building foundations and any terracing or retaining walls required
for the stormwater control design, is shown in renderings and other
architectural drawings.
Landscaping plans, including planting plans, show locations of
bioretention facilities, and the plant requirements are consistent with
the engineered soils and conditions in the bioretention facilities.
Renderings and representation of street views incorporate any
stormwater facilities located in street-side buffers and setbacks.
Any potential conflicts with local development standards have been
identified and resolved.
Review Chapter 4 to anticipate additional requirements for design and
construction of IMPs.
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Reduced Bioretention Sizing
Bioretention facilities for treatment only must be sized so that the area of
engineered soil mix that is flooded at the point of overflow is a minimum 4%
of tributary equivalent impervious area. See Tables 3-2 and 3-5 and the
accompanying instructions.
Reduced sizing (less than 4% of tributary equivalent impervious area) can only
be used for road reconstruction projects that follow requirements outlined in
MRP 3.0 Provision C.3.b.ii (5)(c), or that are non-regulated projects under
C.3.b. For further detail on applicability of reduced bioretention sizing, visit
https://www.cccleanwater.org/development-infrastructure/green-
infrastructure/resources. All facilities must be at least as large as the minimum
sizes determined by the following equation:
Sizing Factor = 0.00060 × MAP + 0.0086
where MAP = Mean Annual Precipitation in inches, per Contra Costa County
Public Works Figure B-166, which can be found on the CCCWP web page.
It should be noted, however, the reduced sizing factor calculation for
bioretention facilities may not satisfy full trash capture.
Bioretention Facility Characteristics. The facility must conform to all
Guidebook design and construction criteria, including the following:
Each layer of the facility must be level throughout, and construction
drawings must show elevations for facility rim, overflow grate, top
of soil layer (TSL), top of gravel layer (TGL), and bottom of gravel
layer (BGL).
Facilities must be inspected at each stage of construction.
See details in Appendix F for further designer guidance.
Non-LID Treatment
LID has been found to be feasible for nearly all development sites. If you
believe LID design may be infeasible for part of or your entire development
site, you should consult with municipal staff and seek additional technical
assistance for incorporating LID into your site before considering non-LID
options.
ʇ SPECIAL PROJECTS
“Special Projects” that meet the criteria in Provision C.3.e.ii may be subject to
local staff review and approval and subject to a demonstration that it is
4% or Smaller?
Appendix E includes technical
background and a policy
rationale for Contra Costa
municipalities’ treatment-only
sizing criteria.
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infeasible to use LID to treat 100% of runoff, use the following non-LID
treatment systems for up to the specified proportion of the total impervious
area on the site:
Tree-box-type high-flowrate biofilters.
Vault-based high-flowrate media filters.
Special projects fall into three categories. Category A special projects must:
create or replace one half acre or less of impervious surface area;
be built as part of a stated objective to preserve or enhance
pedestrian oriented urban design;
be located in the central business district, downtown core,
neighborhood business district or historic preservation site or
district;
include no surface parking except incidental surface parking for
emergency vehicles, Americans with Disabilities Act (ADA) access,
and loading areas;
and have at least 85% coverage for the project site by permanent
structures.
Category B special projects must:
create or replace between one half acre and 2 acres of impervious
surface area
be built as part of a stated objective to preserve or enhance
pedestrian oriented urban design;
be located in the central business district, downtown core,
neighborhood business district or historic preservation site or
district;
include no surface parking except incidental surface parking for
emergency vehicles, ADA access, and loading areas;
and have at least 85% coverage for the project site by permanent
structures.
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Category C affordable housing projects must:
be primarily a residential development project
achieve at least a gross density of 40 dwelling units per acre
be preserved housing with deed restrictions running at least 55 years
with rent/mortgage rates (including utilities) no greater than 30% of
the area median household income (AMI) limits adjusted for
household size based on the maximum percentage of AMI for each
income category as defined by the Federal Department of Housing
and Urban Development for affordable housing in metropolitan
areas as follows:
Acutely low household income is 0-15% of AMI
Extremely low household income is 16-30% AMI
Very low household income is 31-50% AMI
Low household income is 51-80% AMI
Moderate household income is 80-120% AMI
A calculation worksheet to aid in Special Projects calculations is provided
as part of the Development Review checklist (Appendix G).
ʇ ALTERNATIVE TREATMENT SYSTEMS
Alternative treatment is an option provided in the Amendment of Order No.
R2-2022-0018 to NPDES Permit No. CAS61200. However, a regional
guidance document needs to be prepared before alternative treatment can be
used. This document effort will likely be led by the Bay Area Municipal
Stormwater Collaborative.
The Regional Guidance Document to facilitate compliance with
Demonstration of Technical Infeasibility and Demonstration of
Commensurate Benefit, once finalized, is to be submitted to the Water Board
for Executive Officer approval. The Regional Guidance Document must be
submitted on or before the deadline described in Provision C.3.c.i.(2)(c)(iii)f.2.
If the Executive Officer determines that Regional Guidance Document is
sufficiently detailed to enable review of demonstrations of technical infeasibility
and commensurate benefits, the Executive Officer may approve demonstration
of technical infeasibility and commensurate benefit through the Regional
Guidance Document in lieu of approving both separately. Once the guidance
document is developed and approved, further guidance for the use of
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alternative treatment to comply with C.3.d will be provided in a future update
to this guidebook.
ʇ TECHNICAL CRITERIA FOR NON-LID FACILITIES
General:
Water quality treatment IMPs must have a treatment throughput
rate that is sufficient to fully treat stormwater runoff generated by a
continuous rainfall intensity of 0.2 inches per hour.
Landscape and non-impervious surfaces should be self-treating or
self-retaining and should not drain to treatment facilities, if feasible.
Use the runoff factors in Table 3-2.
The applicant’s Stormwater Control Plan must include as an
attachment a letter from the manufacturer stating the manufacturer
has reviewed the Stormwater Control Plan, and the proposed device
meets these technical criteria. Check with your local municipality
for warranty requirements.
If the project will include non-LID treatment measures, select a
treatment measure certified for “Basic” General Use Level
Designation (GULD) by the Washington State Department of
Ecology’s TAPE.
High-Flowrate Tree-Box-Type Biofilters:
Maximum design surface loading rate of 50 inches per hour.
Precast concrete construction.
Inlet design to capture flows at least up to the maximum design
surface loading rate and to bypass high flows.
Minimum media depth of 1.8 feet (may be reduced, but maintaining
the same media volume, if required because of inadequate head to
discharge point).
Media and facility configuration supports a healthy tree or other
vegetation.
Vault-Based High-Flowrate Media Filters:
Replaceable cartridge filters.
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Maximum design filter surface loading rate of 1 gallon per minute
per square foot (gpm/ft2)
Storage volume detains runoff and allows settling of coarse solids
prior to filtration.
Flow through the cartridge filters is controlled by an orifice or other
device so that the design surface loading rate is not exceeded.
ʇ EXAMPLE CALCULATIONS:
Given a project with the following DMAs draining to a non-LID facility:
DMA 1: 2,050 ft2 roof, runoff factor 1.0
DMA 2: 3,035 ft2 asphalt, runoff factor 1.0
DMA 3: 250 ft2 solid unit pavers set in sand, runoff factor 0.2 (per Table 3-2)
Equivalent Impervious Area
= (2,050 ft2 + 3,035 ft2) × 1.0 + (250 ft2 × 0.2) = 5,135 ft2
High-Flowrate Tree-Box-Type Biofilter:
Sizing factor
= [rainfall rate (in/hr)] / [media infiltration rate (in/hr)]
= [0.2 in/hr] [50 in/hr]
= 0.004
Minimum biofilter surface area
= [equivalent impervious area (ft2)] x [sizing factor]
= [5,135 ft2] x [0.004]
= 21 ft2
Vault-Based High-Flowrate Media Filter:
Design flowrate (in gallons per minute)
= [equivalent impervious area (ft2)] x [rainfall rate (in/hr)]
= [5135 ft2] x [0.2 in/hr] x [1 ft/12 in] x [1 hr/60 min] x [7.48 gal/ft3]
= 10.7 gallons per minute (gpm)
Obtain the cartridge capacity directly from the manufacturer. For this example,
assume:
Cartridge capacity = 4 gpm per cartridge
Number of cartridges required (round up to whole number)
= [design flow rate (gpm)] / [cartridge capacity (gpm per cartridge)]
= [10.7 gpm] / [4 gpm/cartridge]
= 3 cartridges
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If flow-control (HM) requirements apply, also review the options for
compliance in Chapter 1. Then consult with municipal staff before preparing
an alternative design for stormwater treatment and HM.
ʇ DEMONSTRATION OF INFEASIBILITY IS REQUIRED
To obtain approval to use any non-LID treatment systems, the applicant must
demonstrate, to the satisfaction of the municipal reviewer, that it is infeasible
to treat runoff from the same area using bioretention facilities, either sized to
4% of tributary equivalent impervious area, or as may be justifiable for the site
and for specific DMAs, reduced bioretention sizing (see preceding section).
For all non-LID designs, the applicant must submit a complete Stormwater
Control Plan, including an exhibit showing the entire site divided into discrete
Drainage Management Areas, and text and tables showing how drainage is
routed from each DMA to a treatment facility.
In addition, to establish the infeasibility of implementing LID on the entire
site, include in the Stormwater Control Plan an explanation of how routing of
drainage has been optimized so that as much runoff as possible goes to LID
features and facilities (if any). For DMAs draining to tree-box-type high-flow-
rate biofilters and/or high-flow-rate media filters, briefly describe all project
areas not covered by buildings. Note the uses of all impervious paved areas and
why LID treatment is precluded for these areas.
For any landscaped areas, note and briefly describe the following technical
constraints as applicable:
Inadequate size to accommodate bioretention facilities that meet
sizing requirements for the tributary area.
Slopes too steep to terrace.
Environmental constraints (for example, landscaped area is within a
riparian corridor and applicable regulations prohibit bioretention
facilities within that corridor).
High groundwater (within 2 feet of ground surface) or shallow
bedrock.
Conflict with subsurface utilities.
Cap over polluted soil or groundwater.
Lack of head or routing path to route runoff to the landscaped area
or from a bioretention underdrain to the municipal storm drain.
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Other conflicts, including required uses that preclude use for
stormwater treatment (describe in detail).
Also include in your Stormwater Control Plan a narrative discussion of
infeasibility of offsite treatment:
Describe whether the project proponent owns or otherwise controls
land within the same watershed of the project that can accommodate
in perpetuity offsite bioretention facilities adequately sized to treat
the runoff volume of the primary project.
Identify any regional LID stormwater mitigation programs available
to the project for in-lieu C.3 compliance.
A worked example for a project requiring HM, using BAHM is provided
in Appendix H.
ʇ REFERENCES AND RESOURCES
Municipal Regional Permit Provision C.3.e.
Special Projects Proposal (BASMAA, 2010)
Crosswalk Summary of CCCWP IMPs and
BAHM Model Elements
TABLE 3-6. BAHM TERMINOLOGY AND CROSS REFERENCE TABLE
BAHM
Term
Definition Countywide
Program Guidance
Term
Additional
Countywide
Program Guidance
Basin The project drainage area
or the area that drains to a
treatment measure or
hydromodification
management (HM) facility
Drainage
Management Area
(DMA)
Pond Surface storage facility
(either with a trapezoidal
or irregularly shaped top
edge) with an outlet
structure to control
outflow to meet HM
standards; can allow
infiltration
x Detention basin
x Self-retaining area
(represented by
shallow pond)
x Detention Basin is
not an LID
treatment option
(except when used
to represent a self-
retaining area)
x Detention Basin is
not an HM option
allowed by
CCCWP
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BAHM
Term
Definition Countywide
Program Guidance
Term
Additional
Countywide
Program Guidance
Vault Below-ground, rectangular
storage facility with an
outlet structure to control
outflow to meet HM
standards; can allow
infiltration
Storage vault
Tank Below-ground storage
facility, represented by a
cylinder placed on its side
(either circular or an
arched half-cylinder with
open bottom) with an
outlet structure to control
outflow to meet HM
standards; can allow
infiltration
x Large diameter
pipe (circular tank)
x Subsurface
infiltration system
(arched half-
cylinder)
BMP Best management
practice for treatment
and/or HM control
x IMP (CCCWP)
x Stormwater
Treatment or
HM Control
Measure
(SCVURPPP)
Bioretention Landscaped treatment
system with sloped
sides using
biotreatment soil
underlain by gravel,
with optional
underdrain, allowing
infiltration
Bioretention Select “BAHM5”
as the top layer to
represent
approved Bay
Area bio-
treatment soil mix
In-Ground
Infiltration
Planter
Bioretention facility
with vertical sides and
an open bottom
allowing infiltration to
native soil and optional
underdrain
x Bioretention
(CCCWP)
x Bioinfiltration
x Flow-through
planter
Select “BAHM5”
as the top layer to
represent
approved Bay
Area bio-
treatment soil mix
Flow-
Through
Planter
Bioretention facility
with vertical sides, solid
bottom, and
underdrain; no
infiltration allowed
x Biotreatment
x Flow-through
planter
(CCCWP)
Select “BAHM5”
as the top layer to
represent
approved Bay
Area bio-
treatment soil mix
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BAHM
Term
Definition Countywide
Program Guidance
Term
Additional
Countywide
Program Guidance
Permeable
Pavement
Surface layer of porous
asphalt, porous
concrete, concrete
pavers, or grid
pavement underlain by
one or two subgrade
layers of gravel or sand
Permeable,
pervious, or
porous pavement
Gravel
Trench
Gravel-filled trench
allowing infiltration into
native soil (may include
underdrain)
Infiltration trench
with underdrain
Infiltration
Trench
A gravel-filled trench
with no underdrain (all
water must infiltrate
into native soil)
Infiltration trench
with no underdrain
Underdrain
generally
recommended
(i.e., use gravel
trench)
Dry well In-ground Infiltration
Planter, Infiltration
Trench or Gravel
Trench with no
underdrain (all water
must infiltrate into
native soil)
Dry well
Infiltration
Basin
Trapezoidal “pond”
that can infiltrate stored
water into native soil at
a specified rate
Infiltration basin Not an HM
option allowed by
CCCWP
Dispersion Method of allowing an
impervious “lateral”
basin to flow onto a
pervious “lateral” basin
which infiltrates some
of the runoff before
routing the rest to an
HM control facility
One way of
representing a self-
retaining area
Green Roof Roof area covered with
vegetation and soil
media (drainage
through media is
represented as
“groundwater” that
contributes to the total
runoff)
Green roof
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1. Self-Treating Areas
2. Self-Retaining Areas
3. Areas Draining to Self-Retaining Areas
Runoff-reduction site-design measures are the most effective
and least expensive way to implement LID.
Manage drainage from pervious landscaped areas separately,
so that it doesn’t run on to adjacent pavement.
Further reduce runoff by dispersing runoff from impervious
roofs and pavement to landscaped areas.
To incorporate these features into your project, delineate and
classify the Drainage Management Areas (DMAs) appropriately
on your Stormwater Control Plan Exhibit. See page 35.
Follow the criteria below in your Exhibit and grading and drainage
plan.
Note: Runoff from drainage management areas that do not meet the
criteria for self-treating areas, self-retaining areas, or areas draining
to self-retaining areas must be directed to bioretention facilities or
other IMPs.
1. Self-Treating Areas
Self-treating drainage management areas are natural, landscaped, or
turf areas that drain directly off site or to the storm drain system.
Examples include upslope undeveloped areas from which runoff is
piped or ditched and drained around a development and grassed
slopes that drain offsite to a street gutter. Self-treating areas must not
drain on to adjacent paved areas within the project.
Drainage from self-treating areas must flow to off-site streets or
storm drains without flowing on to paved areas within the project.
Lawn or landscaped areas adjacent to streets can be considered self-
treating areas. Pavement within a self-treating area must not exceed
5% of the total area.
Runoff Reduction Measures
Ź Best Uses
Sites with extensive
landscaping
Ź Advantages
Low cost
No maintenance
verification
requirement
Complements site
landscaping
Ź Limitations
Requires substantial
square footage
Grading
requirements must
be coordinated with
landscape design
Stormwater C.3
Guidebook
www.cccleanwater.org
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Criteria for Self-Treating Areas
Runoff from the self-treating area does not enter an IMP or another drainage
management area, but goes directly offsite or to the storm drain system.
The self-treating area is at least 95% lawn or landscaping (not more than 5%
impervious).
Re-graded or re-landscaped areas have amended soils, vegetation, and irrigation as may
be required to maintain soil stability and permeability.
2. Self-Retaining Areas
Where a landscaped area is upslope from or surrounded by paved areas, a
self-retaining drainage management area (also called a zero-discharge area)
may be created. Self-retaining areas are designed to retain the first one inch
of rainfall without producing any runoff. The technique works best on flat,
heavily landscaped sites. It may be used on mild slopes if there is a
reasonable expectation that the first inch of rainfall would produce no
runoff.
Self-treating areas drain off-site
Cross-Section
Drainage from self-treating
area conveyed directly to
storm drain Convey drainage from paved area
to IMP (not shown)
Plan
Drainage from paved
area is managed separately
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To create self-retaining turf and landscape areas in flat areas
or on terraced slopes, berm the area or depress the grade into
a concave cross-section so that these areas will retain the first
inch of rainfall.
Self-retaining areas can also be created by depressing lawn and
landscape below surrounding sidewalks and plazas. Leave
enough reveal (elevation difference) to accommodate buildup
of turf or mulch.
Ź Criteria for Self-Retaining Areas
Area is bermed all the way around or graded concave.
Slopes do not exceed 4%.
Entire area is lawn, landscaping, or pervious pavement (see criteria for
pervious pavement).
Area has amended soils, vegetation, and irrigation as may be required to
maintain soil stability and permeability.
Any area drain inlets are at least 3 inches above surrounding grade.
Overflow (which may occur during high-intensity events) is conveyed safely.
Slope terraced to create a
self-retaining area
Lawn depressed to create a
self-retaining area
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3. Areas draining to self-retaining areas
Drainage from roofs and paving can be directed to self-retaining drainage
management areas and allowed to infiltrate into the soil. The maximum
ratios are:
The
self-
retaining area must be bermed or depressed to retain an inch of rainfall
including the flow from the tributary impervious area. Inlets of area drains,
if any, should be set 3 inches above the low point to allow ponding. Self-
retaining areas should be designed to promote even distribution of ponded
runoff over the area.
Runoff from walkways or driveways in parks and park-like areas can sheet-
flow to self-retaining areas. Roof leaders can be connected to self-retaining
areas by piping beneath plazas and walkways. If necessary, a “bubble-up”
can be used.
Ź CRITERIA FOR AREAS DRAINING TO SELF-RETAINING AREAS
Ratio of tributary impervious area to self-retaining area is not greater than 2:1 (1:1 if
flow-control requirements apply).
Roof leaders collect runoff and route it to the self-retaining area.
Paved areas are sloped so drainage is routed to the self-retaining area.
If runoff is concentrated where it enters the self-retaining area, there are appropriate
measures to protect against erosion and promote flow across the self-retaining area.
Site requirement Maximum allowable ratio
Treatment only 2 parts impervious: 1 pervious
Treatment and flow-control 1 part impervious: 1 pervious
A roof leader extends to a bubble-up to
convey roof runoff to a self-retaining area.
Roof runoff is directed to an adjacent
self-retaining landscaped area.
Area draining to
self-retaining area
Self-retaining area
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Pervious Pavements
Impervious roadways, driveways, and parking lots account for
much of the hydrologic impact of land development. Pervious
pavements allow rainfall to collect in a gravel or sand base
course and infiltrate into native soil instead of creating runoff.
Pervious pavements are often costly to build and maintain
when compared to conventional pavement draining to
bioretention facilities. However, in some applications the
aesthetic or practical benefits of a flat surface unbroken by
drainage structures may be worth the additional cost.
Stormwater C.3
Guidebook
www.cccleanwater.org
Ź Best Uses
Flat areas
(< 2% slope)
Areas with
competent,
permeable native
soils
Low-traffic areas
Where aesthetic
quality can justify
higher cost
Ź Advantages
No maintenance
verification
requirement for
installations
< 3000 square feet
Surface treatments
can complement
landscape design
Ź Limitations
Initial cost
Placement requires
specially trained
crews
Geotechnical
concerns, especially
in clay soils
Concerns about
pavement strength
and surface integrity
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Pervious pavements are not treatment facilities. However,
they may be configured as self-retaining areas. In specific,
limited circumstances, pervious pavements configured as self-
retaining areas may receive some runoff from roofs or
conventional pavement—if it can be shown that the required
amount of runoff, as well as rain falling on the pervious
pavement, will infiltrate into the underlying soil.
Solid unit pavers—such as bricks, stone blocks, or precast
concrete shapes—are considered to reduce runoff compared
to impervious pavement, when the unit pavers are set in sand
or gravel with 3/8-inch gaps between the pavers. Joints must
be filled with an open-graded aggregate free of fines.
If pervious pavement areas drain to Integrated Management
Practices (IMPs), use the runoff factors in Table 3-2 when
sizing the IMPs.
Ź DETAILS
Permeable pavements can be used in clay soils; however,
special design considerations, including an increased depth of
base course, typically apply and will increase the cost of this
option. Geotechnical fabric between the base course and
underlying clay soil is recommended.
Permeable pavements are best used on grades from flat to
approximately 2%. Installations on steeper grades, particularly
on clay soils, require cut-off trenches lateral to the slope—to
intercept, store, and infiltrate drainage from the base course.
Pavement strength and durability typically determines the
required depth of base course. If underdrains are used, the
outlet elevation must be a minimum of 3 inches above the
bottom elevation of the base course.
Pervious concrete and porous asphalt must be installed by
crews with special training and tools. Industry associations
maintain lists of qualified contractors.
Parking lots with crushed aggregate or unit pavers may require
signs or bollards to organize parking.
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Ź CRITERIA FOR PERVIOUS PAVEMENTS
Installation is flat or < 2% grade.
No erodible areas drain on to pavement.
Subgrade is uniform and slopes are not so steep that subgrade is prone
to erosion. Compaction is minimal.
Reservoir base course is of open-graded crushed stone. Base depth is
adequate to retain rainfall and support design loads.
If a subdrain is provided, outlet elevation is a minimum of 3 inches
above highest point of bottom of base course.
Rigid edge is provided to retain granular pavements and unit pavers.
Solid unit pavers, if used, are set in sand or gravel with minimum
3/8-inch gaps between the pavers. Joints are filled with an open-
graded aggregate free of fines.
17TPermeable concrete and porous asphalt, if used, are installed by
qualified professionals according to vendor’s recommendations.
Selection and location of pavements incorporates Americans with
Disabilities Act requirements, site aesthetics, and uses.
Pavement design and/or grading design incorporates management of
design flows to avoid local flooding (typically a 10-year storm).
Ź RESOURCES
National Ready Mix Concrete Association
http://www.perviouspavement.org/.
National Asphalt Pavement Association
www.asphaltpavement.org..
Interlocking Concrete Pavement Institute
http://www.icpi.org/.
TYPICAL CONFIGURATION for a pervious pavement. The base course is a minimum
3-inch depth for runoff retention. A deeper base course is typically required for pavement stability.
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Start at the Source Design Manual for Water Quality Protection,
pp. 47-53. http://www.cccleanwater.org/c3-resources.html.
Porous Pavements, by Bruce K. Ferguson. 2005. ISBN 0-8493-
2670-2.
Caltrans. 2013. Pervious Pavement Design Guidance.
http://www.dot.ca.gov/hq/oppd/stormwtr/bmp/DG-
Pervious-Pvm_082114.pdf.
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Bioretention Facilities
Bioretention facilities capture runoff in a shallow reservoir on
the soil surface, then filter the runoff through plant roots and
a biologically active soil mix. The treated runoff then trickles
into a subsurface gravel layer. Runoff is held in the gravel layer
until it infiltrates it into the ground. If the entire gravel layer
becomes saturated, an underdrain conveys excess treated
runoff to a storm drain or to surface drainage.
Ź Best Uses
Commercial areas
Residential
subdivisions
Industrial facilities
Roadways
Parking lots
Fit in setbacks,
medians, and other
landscaped areas
Ź Advantages
Can be any shape
Low maintenance
Ź Limitations
Require 4%-15% of
tributary impervious
square footage
Typically require
3-4 feet of head
Irrigation may be
required
Bioretention facilities can be rectangular, linear, or nearly any shape.
Photo by Scott Wikstrom
Stormwater C.3
Guidebook
www.cccleanwater.org
inflow overflow
to storm drain
Class 2 permeable
gravel
sand/compost mix
perforated pipe
underdrain
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LAYOUT AND SITE DRAINAGE
See the guidance on page 32-33 regarding how to incorporate
bioretention facilities into your site. Also see “Integrating Your LID
Design into Your Project” on page 49, and ideas on applications and
ancillary uses on page 73. Place bioretention facilities in visible, well-
trafficked areas and make them a focal point in the landscape.
On flatter sites, use surface drainage, rather than underground pipes,
to convey runoff to the bioretention facility inlets. The top of soil
elevation should be as high as possible—typically 6 to 12 inches below
surrounding grade.
Where possible, design site drainage so only impervious roofs and
pavement drain to the bioretention facility. Avoid high walls or steep
slopes adjacent to bioretention facilities. Avoid side slopes within
bioretention areas as much as possible. The bioretention soil mix will
tend to rill even on very mild slopes (>8:1).
Integrate bioretention facilities with the landscape design.
Make the bioretention facilities level around their perimeter.
Where possible, grade tributary paved areas to sheet flow runoff and
disperse it among curb cuts, rather than concentrating flow at one inlet
location.
Place each facility in a common, accessible area. Avoid locating
facilities on private residential lots.
Ź DIMENSIONS
For development projects subject only to runoff treatment
requirements, the following minimum dimensions apply.
Parameter Criterion
Surface reservoir mean depth 6-inch minimum
Soil mix surface area 0.04 × equivalent tributary
impervious area (or per reduced
sizing if applicable, see p. 50.
Soil mix depth 18-inch minimum
Gravel layer 12-inch minimum Class 2
permeable
Underdrain discharge At top of gravel layer
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Where flow-control requirements also apply, the
bioretention facility must be designed to meet the
minimum surface area (A), surface volume (V1), and
subsurface volume (V2) using Equation 3-3 and the
sizing factors and equations in Tables 3-6 and 3-7.
Use the IMP Sizing Calculator for sizing and to show
calculations.
Surface storage and overflow.In treatment-and-
flow-control facilities, the overflow elevation must be
set to achieve the minimum surface storage volume
calculated using Equation 3-3 and the V1 sizing factor.
The V1 volume is based on the required area times a
12-inch depth, but the designer can also meet V1
volume by a larger than required area and reducing
depth.
Minimum subsurface volume.For treatment-and-
flow-control facilities the minimum subsurface
volume V2 specified in Table 3-6 is the void space, not
the entire volume of gravel. Where the native soils are
Hydrologic Soil Group C or D, V2 may be achieved
by a 30-inch deep layer of gravel of 40% porosity,
extending under the minimum footprint “A”. Note
that if the facility area is increased, the required depth
to achieve the same volume is correspondingly
decreased.
If desired, voids created by buried structures such as
pipes or arches, may be substituted, as long as the
voids are hydraulically interconnected and the
minimum subsurface volume calculated by Equation
3-3 is achieved.
Ź FACILITY DETAILS
Prepare details and include notes on construction
drawings as appropriate to your design.
Inlets.Curb cuts should be wide (12 inches is
recommended) to avoid clogging with leaves or
debris. Allow for a minimum reveal of 6 inches
between the inlet and soil mix elevations to ensure
turf or mulch buildup does not block the inlet. In
addition, place an apron of stone or concrete, a foot
square or larger, inside each inlet to prevent
vegetation from growing up and blocking the inlet.
A
V1 (ponding volume)
V2 (pore volume)
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If the linear slope along the curb is greater than the
orthogonal slope of the gutter pan, runoff flows will not
enter the inlet efficiently. Use a drop inlet with a grate
instead.
Where runoff is concentrated and conveyed to the facility
via pipes or swales, protect the plants and soil mix from
high-velocity flows with energy-dissipating cobble of
appropriate size. In larger installations, provide cobble-lined
channels to better distribute flows throughout the facility.
“Bubble ups” can be used to dissipate energy when runoff
is piped from roofs and up-gradient paved areas.
Overflow structure. A precast concrete catch basin or
manhole is required except in small and protected facilities.
The overflow elevation is critical and must be designed to
achieve the surface reservoir requirements. The outlet
should be designed to exclude floating mulch and debris.
An atrium-style or beehive grate is recommended and may
be required.
Underdrains. Underdrains must have their discharge
elevation set at the top of gravel layer elevation. Perforated
pipe can be laid in a shallow groove dug across the top of
the gravel layer, holes facing down, and connected to the
overflow structure. Underdrains must be constructed of
rigid pipe (SDR 35 or equivalent) and provided with a
cleanout.
Flow-control orifice. For treatment-and-flow-control
facilities, the underdrain must be routed through a device
designed to limit flows to that specified in Equation 3-10 or
3-11 (page 46). Typically, a section of solid pipe is designed
to protrude slightly into the overflow structure. The pipe is
threaded and fitted with a standard cap; a hole of the
specified diameter is drilled into the cap. The cap can then
be easily removed for cleaning or adjustment and
reinstalled.
Vaults, utility boxes, backflow preventers, and light
standards. Utility features and structures must be located
outside the bioretention facility.
Emergency overflow. The site grading plan should
anticipate extreme events and potential clogging of the
overflow and should route emergency overflows safely.
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Ź SOIL, PLANTING, AND IRRIGATION
Gravel underlayer. Use “Class 2 permeable,” Caltrans
specification 68-2.02(F)(3). Open-graded crushed rock,
washed, may be used as an alternative, but requires 4- to 6-inch
washed pea gravel be substituted at the top of the crushed rock
layer. Do not use filter fabric to separate the soil mix from the
gravel drainage layer or the gravel drainage layer from the
native soil.
Planting Soil Mix. The required mix of sand and compost is
specified in BASMAA’s April 2016 “Specification of Soils for
Biotreatment or Bioretention Facilities.” The mix is similar to
a loamy sand and must maintain a minimum percolation rate
of 5 inches per hour throughout the life of the facility. It is
suitable for maintaining plant life with no (or very little)
fertilizer use. Use of the specified (rather than “alternative”)
soil mix is strongly encouraged.
At their sole discretion, municipal construction inspectors may
accept test results and certification for a “brand-name” mix
from a soil supplier. Batch-specific testing is required for
installations of over 100 cubic yards.
Submittals for the soil mix must include and follow the
CCCWP “Soil Mix for Bioretention Specification Verification
Checklist.” The checklist, soil mix specification, and a list of
suppliers are available on the CCCWP C.3 web page.
Ensure the soil mix is installed level and at the specified
elevation, and that the elevation does not change when plants
are installed. Place the bioretention soil in 8- to 12-inch lifts.
Lifts are not to be compacted but are placed to reduce the
possibility of excessive settlement. Allow time for natural
compaction and settlement prior to planting. Bioretention soil
may be watered to encourage compaction.
Planting. Species in Appendix B were selected for:
Adaptation to Contra Costa’s climate
Drought tolerance
Adaptation to well-drained soils
Adaptation to low soil fertility
Allow infiltration
Not invasive weeds
Do not have aggressive roots
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Characteristics noted in the table, including irrigation
preferences and ability to tolerate heat, coastal conditions,
flooding, and wind should be considered when selecting plants.
This list is not comprehensive, nor will all these species
succeed at every site. Selection for a particular site should be
done by experienced professionals familiar with the plants and
site conditions. Avoid planting species on the California
Invasive Plant Council’s invasive plant inventory list.
Trees and large shrubs installed in bioretention facilities are
susceptible to blowing over before roots are established. They
should be staked securely. Three stakes per tree are
recommended at windy sites. Straps should be inspected once
or twice a year and removed once trees are established to
prevent girdling.
Mulch is not required but is recommended for the purpose of
retaining moisture, preventing erosion and minimizing weed
growth. Compost meeting the specification for use in the
planting soil mix is recommended for use as mulch. This “aged
mulch” has less tendency to float compared to bark mulch.
Irrigation. Bioretention soils have a high infiltration rate and
require a different irrigation system design than the designs
typically used for heavy clay soils in Contra Costa County.
Irrigation systems must be designed to minimize water use,
avoid overwatering, and prevent underdrain discharges during
dry weather.
Bioretention facilities and planter boxes may need to be
irrigated more than once a day, for shorter periods. Irrigation
controls should allow separate control of times and durations
of irrigation for bioretention facilities and planter boxes vs.
other landscape areas.
Smart irrigation controllers are strongly encouraged. Available
controllers may access weather stations, use sensors to measure
soil temperature and moisture, and allow input of soil types,
plant types, root depth, light conditions, slope, and usable
rainfall.
Drip emitters are strongly recommended over spray irrigation.
Use multiple, lower-flow (1/2 to 2 gallons per hour) emitters
in fast-draining bioretention soils. Use two or more emitters
for perennials, ground covers, and bunchgrasses. Four to six
emitters may be needed for larger shrubs and trees. Some types
of emitters encourage horizontal distribution of water.
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Spray heads must be positioned to avoid direct spray
into bioretention facility or planter box outlet
structures.
Trees.Bioretention areas can accommodate small
or large trees within the minimum areas and
volumes calculated by Equation 3-3. Tree canopies
intercept rain, and tree roots maintain soil
permeability and help retain runoff. Normal
maintenance of a bioretention facility should not
affect tree lifespan.
Consider the following when designing
bioretention facilities to accommodate trees,
especially large trees:
The bioretention facility requires 18 inches
of soil mix over the minimum surface area.
Trees can be planted in this soil mix; the
area occupied by the tree counts toward the
minimum area requirement.
Trees require sufficient rooting volume to
thrive. Structural soils can be used below
or around the soil mix.
Most tree roots extend horizontally near
the soil surface.
The bioretention soil mix has low
moisture-holding capacity. Consider
planning for tree roots to access native
clay soils through the side walls as the tree
grows. However, where needed, adjacent
paving or structures can be protected with
a root barrier.
A podium of native soil is sometimes
constructed so that the root ball can be
installed at the correct elevation (so that
bioretention soil mix and mulch do not
cover the tree’s root collar).
Large trees should be spaced appropriately for their size at maturity.
Trees may need to be staked for longer because the bioretention soil mix
provides little structural support against trees being toppled by wind.
Bioretention facility configured as a tree well.
Larger bioretention facility with trees.
Structural soil
Sand/compost mix Underdrain
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Ź APPLICATIONS AND ANCILLARY USES
Multi-purpose landscaped areas. Bioretention facilities are
easily adapted to serve multiple purposes. The loamy sand soil
mix will support either turf or a plant palette suitable to the
location and a well-drained soil.
Residential subdivisions.In the design of many
subdivisions, it has proven easiest and most effective
to drain roofs and driveways to the streets (in the
conventional manner) and then drain the streets to
bioretention areas, with one bioretention area for each
1 to 10 lots, depending on subdivision layout and
topography.
Bioretention areas should be placed in common areas
or on one or more separate, dedicated parcels with
joint ownership.
Sloped sites.Bioretention facilities must be constructed as a
basin or as a series of basins, with the circumference of each
basin level.
On the surface, a bioretention facility should be one level,
shallow basin—or a series of basins. As runoff enters each
basin, it should flood and fill throughout before runoff
overflows to the outlet or to the next downstream basin. This
helps prevent movement of surface mulch and soil mix.
Swales can be used on mild slopes. Check dams should be
placed every 4 to 6 inches of elevation change and so that the
lip of each dam is at least as high as the toe of the next
upstream dam.
Treatment Area
sand/compost mix
Class 2 permeable
Native soil, no compaction
Swale with check dams. Not suitable for steeper slopes. Movement of
soil can be a problem even at mild slopes. Design must ensure ponding behind
each check dam.
Bioretention facility in El Cerrito with active
and passive recreational uses.
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A series of planters is a more robust solution and is required
for steeper slopes.
Solutions for surface storage.Placing a steep-sided
depression in an urban landscape poses aesthetic
challenges as well as practical challenges. First, use
sheet flow, valley gutters, and trench drains, instead of
pipes, to move runoff to the bioretention facility, so
that inlets can be at or near ground level.
To further avoid the effects of high and steep drop
offs, consider:
Increasing the facility area and reducing the surface
depth accordingly.
Incorporating steps down into the facility.
Specifying taller, woody plants to block or
discourage entry.
Mulch can be mounded a few inches deeper at walkway
edges to transition to the top of soil elevation.
Key check dams into bottom and side slopes.
Concrete check dams are a better solution on steeper slopes.
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References and Resources
Model Biotreatment Soil Media Specifications—MRP 2.0 Provision
C.3.c.i.(2)(c)(ii)
Recommendations for Soils Specification, Planting, and Irrigation of Bioretention Facilities,
WRA Environmental Consultants, November 5, 2008.
US Composting Council
ASTM International
Plant List and Planting Guidance for Landscape-Based Stormwater Measures. Appendix B
in the Alameda County Clean Water Program C.3 Technical Guidance (2016).
Plants and Landscapes for Summer Dry Climates. Nora Harlow, Ed. East Bay
Municipal Utility District, Oakland.
California Native Plants for Your Garden and Wildlife, Las Pilitas Nursery, 2008.
Native Treasures: Gardening with the Plants of California. M. Nevin Smith, 2016.
University of California Press.
The Calflora Database, 2008.
California Invasive Plant Council
A Guide to Estimating Irrigation Water Needs of Landscape Plantings in California,
University of California Cooperative Extension and California Department of
Water Resources.
Our Water Our World, website to developed to assist consumers in managing
home and garden pests in a way that helps protect water.
Bay-Friendly Best Practices for Landscape Professionals, a whole systems
approach to the design, construction, and maintenance of the landscape to
support the integrity of the San Francisco Bay watershed.
University of California Statewide Integrated Pest Management (IPM) Program
ʇ Criteria for Bioretention
Bioretention facilities are located in a visible, well-trafficked area.
Top of soil elevation is as high as possible. High walls and steep slopes
adjacent to the facility are avoided.
Location and footprint of facility are congruent on the site plan,
landscaping plan, and grading plan.
Bioretention area is designed as a basin (level edges) or a series of basins,
and grading plan is consistent with these elevations. Check dams, if any,
are set so the lip or weir of each dam is at least as high as the toe of the
next upstream dam.
Volume or depth of surface reservoir meets or exceeds minimum.
Freeboard above overflow (1 to 2 inches recommended) is not included
in surface reservoir volume.
18-inch depth specified soil mix.
Area of soil mix meets or exceeds minimum.
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Perforated pipe (PVC SDR 35 or approved equivalent) underdrain with discharge elevation at the top
of the “Class 2 perm” layer. Holes facing downward. Connection and sufficient head to storm drain or
approved discharge point.
No filter fabric.
Underdrain has a clean-out port consisting of a vertical, rigid, non-perforated
PVC pipe, with a minimum diameter of 4 inches and a watertight cap.
Curb inlets are 12-inch wide, have 4 to 6-inch reveal and an apron or other
provision to prevent blockage when vegetation grows in, and energy
dissipation as needed.
Overflow catch basin or manhole connected to a downstream storm drain or
approved discharge point.
Emergency spillage will be safely conveyed overland.
Plantings are suitable to the climate, exposure, and a well-drained soil, and
occasional inundation during large storm events.
Irrigation system with connection to water supply, on a separate zone.
Vaults, utility boxes, backflow preventers, and light standards are located
outside the minimum soil mix surface area.
For treatment-and-flow-control facilities only
Volume of surface storage meets or exceeds minimum (V1).
Volume of subsurface storage meets or exceeds minimum (V2).
In “C” and “D” native soils, underdrain is connected to discharge through an
appropriately sized orifice or other flow-limiting device.
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Flow-through Planter
Unlike bioretention facilities, flow-through planters are
designed to discharge all influent runoff following treatment,
rather than infiltrating some treated runoff into the
underlying soil.
Flow-through planters are contained within a concrete box,
or plastic liners may be used on the sides and bottom. An
underdrain is constructed with the discharge elevation near
the bottom of the gravel layer (that is, there is no “dead”
storage).”
Flow-through planters may be used as an alternative to
bioretention under certain conditions:
Upper-story plazas
Where bioretention facilities could cause
mobilization of pollutants in soil or groundwater.
Other situations where infiltration is a concern,
such as locations with potential geotechnical
hazards that cannot be mitigated except by
preventing infiltration.
Stormwater C.3
Guidebook
www.cccleanwater.org
Ź Best Uses
Management of roof
runoff
Podium-style
developments
On building plazas
Ź Advantages
Versatile
Can be any shape
Low maintenance
Ź Limitations
Can only be used
where infiltration is
not possible
May not be used for
flow control (HM)
where underlying
soils are Hydrologic
Soil Group “A” or
“B”
Requires underdrain
Requires 3 to 4 feet
of head
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ʇ DIMENSIONS AND MATERIALS
Treatment only.For development projects subject only to
runoff treatment requirements, the following criteria apply:
Parameter Criterion
Surface reservoir depth 6-inch minimum
Soil mix surface area 0.04 × tributary impervious area
Soil mix depth 18-inch minimum
Gravel layer 12-inch minimum Class 2 permeable
Underdrain At bottom of gravel layer
Where flow-control requirements also apply, the flow-
through planter must be designed to meet the minimum
surface area (A), surface volume (V 1 ), and subsurface volume
(V 2 ) using Equation 3-3 and the sizing factors and equations
in Tables 3-6 and 3-7. The IMP Sizing Calculator should be
used.
Minimum surface and subsurface volume.In a vertical-
sided box-like planter for treatment-and-flow-control with
the minimum surface area A, the minimum surface volume
V 1 can be achieved with an overflow height of 10 inches (12-
inch total height of walls with 2 inches of freeboard).
For treatment-and-flow-control facilities the minimum
subsurface volume V 2 specified in Table 3-8 is the void
space, not the entire volume of gravel. The minimum
subsurface volume V 2 can be achieved with a gravel (Class 2
permeable) depth of 30 inches. This combination results in
a planter approximately 5' high. The planter height can be
reduced by incorporating void-creating underdrain pipes,
other pipes, or arches, or by increasing the planter area so
that the minimum V 2 is achieved.
Gravel.“Class 2 permeable,” Caltrans specification 68-
2.02(F)(3), is preferred. Open-graded crushed rock, washed,
may be used, but requires 4- to 6-inch washed pea gravel be
substituted at the top of the crushed rock layer. Do not use
filter fabric to separate the soil mix from the gravel drainage
layer or the gravel drainage layer from the native soil.
If desired, voids created by buried structures such as pipes
or arches may be substituted, as long as the voids are
hydraulically interconnected and the minimum subsurface
volume calculated by Equation 3-3 is achieved.
A
V1 (ponding volume)
V2 (pore volume)
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Bioretention facility adjacent to building. An impermeable
cutoff wall between the facility and the building may be
incorporated.
Soil mix.Criteria for th18the required mix of sand and compost
are in Appendix B. It is similar to a loamy sand and must
maintain a minimum percolation rate of 5 inches per hour
throughout the life of the facility, and it must be suitable for
maintaining plant life with a minimum of fertilizer use. A list
of suppliers is on the C.3 web pages.
Underdrains.Underdrains must have their discharge
elevation set as flush with the planter bottom as possible.
Underdrains must be constructed of rigid pipe (SDR 35 or
equivalent) and provided with a cleanout.
Flow-control orifice.For treatment-and-flow-control
facilities, the underdrain must be routed through a device
designed to limit flows to that specified in Equation 3-10 or
3-11 (page 46). Typically, a section of solid pipe is designed
to protrude slightly into the overflow structure. The pipe is
threaded and fitted with a standard cap; a hole of the
specified diameter is drilled into the cap. The cap can then
be easily removed for cleaning or adjustment and reinstalled.
ʇ APPLICATIONS
At plaza level. Flow-through planters have been successfully
incorporated into podium-style developments, with the
planters placed on the plaza level and receiving runoff from
the tower roofs above. Runoff from the plaza level is
typically managed separately by additional flow-through
planters or bioretention facilities located at street level.
Adjacent to buildings. Designers should aim to use
bioretention facilities (that is, facilities open at the bottom to
allow infiltration) adjacent to buildings. An impermeable
vertical cutoff wall between the facility and the building may
be incorporated. Where it is not feasible to adjust the
building and foundation design, flow-through planters may
be used. Planter vegetation can soften the visual effect of the
building wall. A setback with a raised planter box may be
appropriate even in some neo-traditional pedestrian-oriented
urban streetscapes.
Steep slopes. Flow-through planters provide a means to
detain and treat runoff on very steep slopes that cannot
accept infiltration from a bioretention facility. The planter
can be built into the slope similar to a retaining wall. The
design should consider the need to access the planter for
maintenance. Flows from the planter underdrain and
overflow must be directed in accordance with local
Flow-through planter built into a hillside. Flows from the
underdrain and overflow must be directed in accordance with
local requirements.
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requirements. It is sometimes possible to disperse these
flows to the downgradient hillside.
Ź Design Checklist for Flow-through Planter
Location and footprint of facility are shown on site plan and
landscaping plan.
Planter is set level.
Location is on an upper-story plaza, adjacent to a building
foundation, where mobilization of pollutants in soil or groundwater
is a concern, or where potential geotechnical hazards are associated
with infiltration.
Volume or depth of surface reservoir meets or exceeds minimum.
18-inch depth specified soil mix (reference Guidebook Appendix B).
Area of soil mix meets or exceeds minimum.
“Class 2 perm” drainage layer.
No filter fabric.
Perforated pipe (PVC SDR 35 or approved equivalent) underdrain
with outlet located flush or nearly flush with planter bottom.
Connection with sufficient head to storm drain or discharge point.
Underdrain has a clean-out port consisting of a vertical, rigid, non-
perforated PVC pipe, with a minimum diameter of 4 inches and a
watertight cap.
Overflow outlet connected to a downstream storm drain or
approved discharge point.
Emergency spillage will be safely conveyed overland.
Plantings are suitable to the climate, exposure, and a well-drained
soil.
Irrigation system with connection to water supply, on a separate
zone. See Appendix B.
For treatment-and-flow-control flow-through planters only
Volume of surface storage meets or exceeds minimum.
Volume of subsurface storage meets or exceeds minimum.
Underdrain is connected via an appropriately sized orifice or other
flow-limiting device.
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Dry Wells and Infiltration Basins
The typical dry well is a prefabricated structure, such as an
open-bottomed vault or box, placed in an excavation or
boring. The vault may be empty, which provides maximum
space efficiency, or may be filled with rock.
An infiltration basin has the same functional
components—a volume to store runoff and sufficient area
to infiltrate that volume into the native soil—but is open
rather than covered.
Ź Criteria
Dry wells and infiltration basins must be designed with the
minimum volume and infiltrative area calculated by
Equation 3-3 using the sizing factors in Table 3-6.
Consult with the local municipal engineer regarding the
need to verify soil permeability and other site conditions
are suitable for dry wells and infiltration basins. Some
proposed criteria are on Page 5-12 of Caltrans’ 2004 BMP
Retrofit Pilot Study Final Report (CTSW-RT-01-050).
Ź Details
Dry wells should be sited to facilitate maintenance and
allow for the potential future need for removal and
replacement.
In locations where native soils are coarser than a medium
sand, the area directly beneath the facility should be over-
excavated by 2 feet and backfilled with sand as a
groundwater protection measure.
Ź Best Uses
Projects on sites with
permeable soils
Ź Advantages
Compact footprint
Can be installed in
paved areas
Ź Limitations
Can be used only on
sites with Group “A”
or Group “B” soils
Requires minimum of
10 feet from bottom
of facility to seasonal
high groundwater
Not suitable for
drainage from some
industrial areas or
arterial roads
Must be maintained
to prevent clogging
Typically, not as
aesthetically pleasing
as bioretention
facilities
Stormwater C.3
Guidebook
www.cccleanwater.org
C O N T R A C O S T A C L E A N W A T E R P R O G R A M
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Criteria for Dry Wells and Infiltration Basins
Volume (V) and infiltrative area (A) meet or exceed minimum.
Emergency spillage will be safely conveyed overland.
Depth from bottom of the facility to seasonally high groundwater
HOHYDWLRQLVIHHW
Areas tributary to the facility do not include automotive repair
shops; areas subject to high vehicular traffic (25,000 or greater
average daily traffic on main roadway or 15,000 or more average
daily traffic on intersecting roadway), car washes; fleet storage
areas (bus, truck, etc.); nurseries, or other uses that may present
an exceptional threat to groundwater quality.
Underlying soils are in Hydrologic Soil Group A or B. Infiltration
rate is sufficient to ensure a full basin will drain completely within
72 hours. Soil infiltration rate has been confirmed.
10-foot setback from structures or as recommended by structural
or geotechnical engineer.
Grate or hatch
for maintenance
access
Sheet flow or
piped inflow
A
V
Vault with open
bottom
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Cistern + Bioretention Facility
A cistern in series with a bioretention facility or flow-through
planter can meet treatment and flow-control requirements
where space is limited. The cistern includes an orifice for flow
control. The downstream bioretention facility or flow-through
planter is sized to accommodate the maximum flow from the
cistern orifice.
Ź CRITERIA
Cistern. Size the cistern using Equation 3-3 (page 45) and the
factors and rainfall adjustment equations in Tables 3-6 and
3-7. The cistern must also include an orifice or other device to
limit outflow to the calculated maximum release rate.
Bioretention facility. Size the bioretention facility or flow-
through planter based on the cistern maximum release rate and
a maximum surface loading rate of 5 inches per hour.
Ź DETAILS
Preventing mosquito harborage. Cisterns should be designed
to drain completely, leaving no standing water. Drains should
be located flush with the bottom of the cistern. Alternatively—
or in addition—all entry and exit points should be provided
with traps or sealed or screened to prevent mosquito entry.
Note mosquitoes can enter through openings 1/16 inch or
larger and will fly for many feet through pipes as small as
1/4 inch.
Exclude debris. Provide leaf guards and/or screens to prevent
debris from accumulating in the cistern.
Ensure access for maintenance. Design the cistern to allow
for cleanout. Avoid creating the need for maintenance workers
to enter a confined space. Ensure the outlet orifice can be easily
accessed for cleaning and maintenance.
Ź APPLICATIONS
Shallow ponding on a flat roof. The “cistern” storage volume
can be designed in any configuration, including simply storing
rainfall on the roof where it falls and draining it away slowly.
In sites with Group “D” soils, the required average depth
amounts to about 3/4 inch.
Ź Best Uses
To meet flow-control
requirements in
limited space
Management of roof
runoff
Dense urban areas
Ź Advantages
Storage volume can
be in any
configuration
Small footprint
Ź Limitations
Somewhat complex
to design, build, and
operate
Requires head for
both cistern and
bioretention facility
Stormwater C.3
Guidebook
www.cccleanwater.org
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Cistern attached to a building and draining to a planter.
This system for treatment-and-flow-control can be
constructed with a flow-through planter at a height as low as
30 inches.
Criteria for Cistern + Bioretention
Cistern volume meets or exceeds calculated minimum V (Eq. 3-3).
Cistern outlet with orifice or other flow-control device restricts flow
to calculated maximum. A drilled, threaded cap is suggested for easy
maintenance.
Cistern outlet is piped to bioretention area or flow-through planter.
Bioretention surface area meets or exceeds the calculated minimum.
Except for surface area, bioretention facility is designed to the criteria
for “treatment only” in the “Bioretention Facility” design sheet (p. 66)
or “Flow-through Planter” design sheet (p. 79).
Cistern is designed to drain completely and/or sealed to prevent
mosquito harborage.
Design provides for exclusion of debris and accessibility for
maintenance.
Overflow connected to a downstream storm drain or approved
discharge point.
Emergency spillage will be safely conveyed overland.
V
A
gutter with
Roof
Flow
control
Underdrain
Overflow
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Bioretention + Vault
A bioretention facility in series with a vault can meet treatment
and flow-control requirements where space is limited. In this
configuration, the bioretention facility is sized to a minimum
of 4% of the tributary impervious area. The underdrain and
overflow from the bioretention facility are routed to a storage
vault, which can be located beneath a plaza, sidewalk, or
parking area. An orifice limits the rate of discharge from the
vault to the storm drain system.
Ź CRITERIA
Bioretention facility. Size and design the bioretention facility
to the treatment-only criteria (see Bioretention Facility design
sheet, p. 66.)
Vault. Size the vault using Equation 3-3 (page 45) and the
factors and rainfall adjustment equations in Tables 3-6 and 3-
7. The vault must include an orifice or other device to limit
outflow.
Dead storage in the bioretention facility (volume of the gravel
pore space or other free volume below the elevation of the
underdrain discharge) may be credited toward the required V2.
ʇ DETAILS
Preventing mosquito harborage. Vaults must be designed to
drain completely, leaving no standing water, and have an open
bottom to allow infiltration into the native soil.
Ensure access for maintenance. Design the vault to allow
for cleanout. Avoid creating the need for maintenance workers
to enter a confined space. Ensure the outlet orifice can be easily
accessed for cleaning and maintenance.
ʇ APPLICATIONS
Parking lot. Because the required landscaped bioretention
facilities is only 4% of the tributary impervious area, the
bioretention component can in many cases be integrated into
parking lot medians and islands. The vault component can be
located beneath aisles or driveways.
Ź Best Uses
To meet flow-control
requirements in
limited space
Parking lots
Dense urban areas
Ź Advantages
Smaller footprint
than bioretention
facility sized for flow
control
Ź Limitations
Somewhat complex
to design, build, and
operate
Requires head for
both bioretention
facility and vault
Stormwater C.3
Guidebook
www.cccleanwater.org
S T O R M W A T E R C . 3 . C O M P L I A N C E
9th Edition APRIL 12, 2024 86
Multiple bioretention facilities draining to a single vault.
Two or more bioretention areas can be connected to a single
vault. The vault minimum volume and outlet maximum flow
rate are the sum of those calculated for each individual
bioretention facility.
Vault with pumped discharge. Where insufficient head exists,
vaults may be equipped with pumps to discharge (at a rate no
greater than the calculated maximum) to a storm drain or
approved discharge point.
Design Checklist for Bioretention + Vault
Bioretention facility is designed to the treatment-only criteria in the
“Bioretention Facility” design sheet (pp. 66-78).
Vault retention volume meets or exceeds calculated minimum.
Vault outlet with orifice or other flow-control device restricts flow to
calculated maximum.
Bioretention facility underdrain is routed to the vault.
Bioretention facility overflow is routed to the vault.
Sufficient head exists to convey flow from the underdrain to the vault and
from the vault to the discharge point.
Bottom of vault is open to allow infiltration.
Vault design provides for exclusion of debris and accessibility for
maintenance.
Vault outlet and overflow are connected to a downstream storm drain or
approved discharge point.
Emergency spillage will be safely conveyed overland.
To storm drainrai
Bioretention
facility sized
and designed to
treatment-only
criteria
A
Perforated pipe
underdrain routed to
vault (overflow also
routed to vault)
Vault must be open
at bottom to allow
infiltration
Orifice limits vault
discharge
V
S T O R M W A T E R C . 3 . C O M P L I A N C E
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Design and Construction of
Bioretention Facilities and
Other Integrated Management Practices
Guidance for preparing construction documents
and overseeing construction of IMPs
etails of construction are critical to ensuring stormwater facilities work
properly. A misplaced inlet, an overflow at the wrong elevation, or the
wrong soil mix can make a bioretention facility useless or ineffective even
before it comes on-line and could result in delays to project approvals and additional
expense.
Your Stormwater Control Plan is intended for the planning phase and must contain,
at minimum, enough detail to demonstrate your planned LID features and that
facilities are feasible and are coordinated with the project site plan, architectural
renderings, landscape design, grading and drainage plan, and other information
submitted with your application for development approvals.
At plan check, reviewers will examine the construction documents to ensure the site
design features and the construction of bioretention facilities and other IMPs will
meet the criteria in this chapter and throughout the Guidebook.
Following are design sheets for:
Self-treating and self-retaining areas,
Pervious pavements,
Bioretention facilities,
Flow-through planters,
Dry wells,
Chapter 4
D
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Cisterns + bioretention, and
Bioretention + vaults.
These design sheets include recommended configurations and conceptual details,
and example applications, for these features and facilities. Additional designer notes
and construction-level details for various site conditions are provided in the Typical
Green Infrastructure Details within Appendix F. The information in these design
sheets and within the Typical GI Details must be adapted and applied to the
conditions specific to the development project. It is not acceptable to simply
copy the information onto construction drawings. Local planning, building, and
public works officials have final review and approval authority over the project
design.
Keep in mind that proper and functional design of features and facilities is the
responsibility of the applicant. Effective operation of facilities throughout the
project’s lifetime will be the responsibility of the property owner.
What to Show on Construction Plans
With few exceptions, the plan set should include separate sheets specifically
incorporating the features and facilities described in the Stormwater Control Plan.
The information on these sheets must be carefully coordinated and made consistent
with grading plans, utility plans, landscaping plans, and (in many cases) architectural
plans.
On the grading and drainage plan, or on a separate stormwater control plan sheet
showing the grading and drainage plan (and possibly the roof plan) screened as
background, show how DMAs follow grade breaks and are consistent with the
grading plan and the Stormwater Control Plan.
ʇ SHOW KEY ELEVATIONS
On the grading and drainage plan, or in a detailed plan view, call out the following
elevations:
Bottom of gravel layer (BGL, or the bottom of the excavation), top of
gravel layer (TGL), and top of soil layer (TSL). Note that each of these
is consistent (flat) throughout the facility.
The top of curbs or walls surrounding the facility, and spot elevations of
adjacent pavement.
At curb cut inlets, show the top of paving, top of curb, and bioretention
TSL.
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At overflow grates, show the grate elevation and the adjacent TSL.
Call out elevations of piped inlets.
For treatment-and-flow-control IMPs, demonstrate how the minimum surface
volume is attained by the design.
ʇ SHOW HOW RUNOFF FLOWS
As needed for clarity, show the direction of runoff flow across roofs and pavement
and into IMPs. For runoff conveyed via pipes or channels, show locations, slopes,
and elevations at the beginning and end of each run.
For roof drainage, show the routing of roof leaders. Use drawings or notes to make
clear how drainage from leaders is routed under walkways, across pavement,
through drainage pipes, or by other means to reach the IMP.
Show pipes or channels connecting the IMP underdrain and overflow to the site
drainage system, municipal storm drain system, or other approved discharge point.
Call out slopes and key elevations.
ʇ SHOW IMPS IN CROSS-SECTION
For many installations, a not-to-scale cross-section view can be used to illustrate the
dimensions and placement of the soil and gravel layers, surrounding walls, and
overflow structures. Where needed, use detailed, specific cross-section drawings to
show edge treatments, inlet elevations, overflow grates, rock for energy dissipation,
moisture barriers, and other information. The design of the edge treatments needs
to consider pedestrian and vehicular loading on the wall and adjacent pavement
surfaces, lateral support of the wall, impact of wall footings on the infiltrative
footprint, lateral movement of subsurface water, and connections to adjacent
infrastructure. Refer to the Typical GI Details provided in Appendix F for example
facility sections and component details. The Typical GI Details provide a Designer
Checklist at the beginning of each section that is helpful in ensuring that the
construction plans include all of the key information needed for plan review and
successful construction of the facility.
The design sheets shall be used as a general guide and the detail drawings and
corresponding construction notes within the Typical GI Details can be used as a
starting point for project-specific details. Do not just copy and paste any of the
detail drawings and/or notes there on to your construction drawings.
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ʇ ADD NOTES TO IMP DETAILS
On cross-section drawings, incorporate the following notes (see pages 62
through 74).
Gravel drainage layer shall be “Class 2 permeable,” Caltrans specification
68-2.02(F)(3).
Soil mix shall meet “Specification of Soils for Biotreatment or
Bioretention Facilities,” dated April 18, 2016.
Mulch shall meet “Composted Wood Mulch Specification for
Stormwater Biotreatment Areas,” dated August 1, 2021. (Biotreatment
Area Wood Mulch Specification)
Underdrain shall be [4 inch minimum] Standard Dimensional Ratio
(SDR) 35 or equivalent, perforations facing down. Lay in groove at top
of gravel layer. A minimum of one cleanout shall be installed on the end
of the underdrain to facilitate cleaning of the underdrain.
Underlying soil is to be uncompacted and ripped to loosen to a minimum
depth of 3 inches immediately prior to placement of the gravel drainage
layer.
If impermeable liner is required, the subgrade shall be prepared and
contoured as necessary to provide a smooth surface, void of sharp rock/
debris. No void spaces shall be present between the liner and the
subgrade. Geotextile fabric may be installed between the subgrade and
the liner to protect the liner from sharp aggregate present in the
subgrade. Engineer shall inspect/approve the prepared subgrade prior to
the installation of any overlaying geotextile material.
Final grades of bioretention soil shall include considerations for soil
settlement and the maximum allowable drop down from the adjacent
walking surfaces to the bottom of the planter.
What to Show on Landscaping Plans
Show the footprints of the IMPs precisely on the landscaping plan, consistent with
the grading plan and other plans in the submittal.
Include a planting plan and an irrigation plan suitable for the soils and other special
conditions of bioretention facilities. See page 93 for guidance on plantings and
irrigation and the plant list in Appendix B for ideas on a plant palette.
Review and revise your landscaping general notes to ensure the notes are consistent
with the special requirements of bioretention facilities.
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Include the following notes on the landscaping plan sheets:
No soil amendments, fertilizers, or synthetic pesticides are to be used
within bioretention facilities. Use only approved bioretention soil mix
and aged compost mulch.
Maintain top of soil elevation following planting.
ʇ REFERENCES AND RESOURCES
San Francisco Stormwater Management Requirements and Design Guidelines
Central Coast Low Impact Development Center Bioretention Standard Details and Specifications
Items to Be Inspected During Construction
Successful construction of IMPs requires attention to detail during every stage of
the construction process, from initial layout to rough grading, installation of utilities,
construction of buildings, paving, landscaping, and final cleanup and inspection.
Construction project managers need to understand the purpose and function of
IMPs and know how to avoid common missteps that can occur during construction.
For bioretention facilities, the following operating principles should be noted at a
pre-construction meeting.
Runoff flow from the intended tributary DMA must flow into the
facility.
The surface reservoir must fill to its intended volume during high
inflows.
Runoff must filter rapidly through the layer of imported soil mix.
Filtered runoff must infiltrate into the native soil to the extent possible
(or allowable).
Remaining runoff must be captured and drained to a storm drain or other
approved location.
See the model construction inspection checklist on the following pages.
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IMP CONSTRUCTION CHECKLIST
LAYOUT (to be confirmed prior to beginning excavation)
Square footage of the facility meets or exceeds minimum shown in Stormwater Control Plan
Site grading and grade breaks are consistent with the boundaries of the tributary Drainage Management Area(s) (DMAs)
shown in the Stormwater Control Plan
Inlet elevations of the facility are low enough and inlets receive drainage from the entire tributary DMA
Locations and elevations of overland flow or piping, including roof leaders, from impervious areas to the facility have been
laid out and any conflicts resolved
Rim elevation of the facility is laid out to be level all the way around, or elevations are consistent with a detailed cross-section
showing location and height of interior dams
Locations for vaults, utility boxes, and light standards have been identified and are outside of the facility footprint
Facility is protected as needed from construction-phase runoff and sediment
EXCAVATION (to be confirmed prior to backfilling or pipe installation)
Excavation conducted with materials and techniques to minimize compaction of soils within the facility area
Excavation is to accurate area and depth
Slopes or side walls protect from sloughing of native soils into the facility
Moisture barrier, if specified, has been added to protect adjacent pavement or structures.
Native soils at bottom of excavation are ripped or loosened to promote infiltration
OVERFLOW OR SURFACE CONNECTION TO STORM DRAINAGE
(to be confirmed prior to backfilling with any materials)
Overflow is at specified elevation (typically no lower than two inches below facility rim)
No knockouts or side inlets are in overflow riser
Overflow location selected to minimize surface flow velocity (near, but offset from inlet recommended)
Grating excludes mulch and litter (beehive or atrium-style grates with ¼ inch openings recommended)
Overflow is connected to storm drain via appropriately-sized piping
Bottom of overflow structure has positive drainage into storm drain (no ponding)
UNDERGROUND CONNECTION TO STORM DRAIN/OUTLET ORIFICE
(to be confirmed prior to backfilling IMP with any materials)
Perforated pipe underdrain (PVC SDR 35 or approved equivalent) is installed with holes facing down
Perforated pipe is connected to storm drain (treatment only) or orifice (treatment-and-flow-control)
Underdrain pipe discharge invert elevation is at top of gravel layer elevation. Pipe is set holes facing down in a groove dug in
the top of the gravel layer (In approved flow-through planters, underdrain elevation is as near bottom as possible)
Cleanouts are in accessible locations and connected via sweeps
Structures (arches or large diameter pipes) for additional surface storage are installed as shown in plans and specifications and
have the specified volume
(continued on next page)
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IMP CONSTRUCTION CHECKLIST (CONTINUED)
DRAIN ROCK/SUBDRAIN (to be confirmed prior to installation of soil mix)
Class 2 permeable, Caltrans specification 68-2.02(F)(3). 4-inch to 6-inch depth of pea gravel atop drain rock may
be substituted with inspectors’ approval
Rock is smoothed to a consistent top elevation and depth and top elevation (TGL) are as shown in plans
Perimeter curb is installed to prevent sloughing of native soils into the facility
No filter fabric is placed between the subdrain and soil mix layers
SOIL MIX
Soil mix is as specified. Submittal is complete and quality of delivered mix is verified by visual and tactile examination
and comparison to submitted sample
Mix installed in 8-inch to 12-inch lifts
Mix is not compacted during installation but may be thoroughly wetted to encourage consolidation
Mix is smoothed to a consistent top elevation. Depth of mix (18 inches minimum) and top elevation are as shown
in plans, accounting for depth of mulch to follow and required reservoir depth (allow time for natural compaction
and settlement prior to planting)
IRRIGATION
Irrigation system is installed so it can be controlled separately from other landscaped areas (smart irrigation
controllers and drip emitters are recommended)
Spray heads, if any, are positioned to avoid direct spray into outlet structures
PLANTING
Plants are installed consistent with approved planting plan
Any trees and large shrubs are staked securely
No fertilizer is added; compost tea may be used
No native soil or clayey material are imported into the facility with plantings
1 to 2 inches of mulch may be applied following planting; mulch selected to avoid floating
Final elevation of soil mix maintained following planting
Curb openings are free of obstructions
FINAL ENGINEERING INSPECTION
DMAs are free of construction sediment and landscaped areas are stabilized
Inlets are installed to provide smooth entry of runoff from adjoining pavement, have sufficient reveal (drop from
the adjoining pavement to the top of the mulch or soil mix, and are not blocked
Inflows from roof leaders and pipes are connected and operable
Temporary flow diversions are removed
Rock or other energy dissipation at piped or surface inlets is adequate
Overflow outlets are configured to allow the facility to flood and fill to near rim before overflow
Plantings are healthy and becoming established
Irrigation is operable
Facility drains rapidly; no surface ponding is evident
Any accumulated construction debris, trash, or sediment is removed from facility
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Bioretention Soil Submittals
Bioretention soils must meet the region-wide “Specification of Soils for
Biotreatment or Bioretention Facilities” (2016).
At their sole discretion, municipal construction inspectors may choose to accept test
results and certification for a “brand name” mix from a soil supplier. Tests must be
conducted within 120 days prior to the date soil is delivered to the project site.
Batch-specific test results are required for projects that install more than 100 cubic
yards of soil mix.
Submittals, whether for the “brand name” mix or batch-specific, must include a
minimum 1-gallon sample and the completed CCCWP Bioretention Soil Mix
Specification Submittal Verification Checklist.
The inspector should examine by look and feel each delivery of the soil mix prior
to installation and verify the following:
The delivered mix closely resembles the submitted mix.
The mix has a grainy, gritty texture and does not clump when dry.
If formed in the hand when damp, the mix may be slightly spongy but
breaks apart easily.
After manipulating the mix, there is no smearing or discoloration on the
hand.
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Operation & Maintenance of
Stormwater Facilities
How to prepare a customized Stormwater Facilities Operation &
Maintenance Plan for the treatment BMPs on your site.
tormwater NPDES Permit Provision C.3.e requires each municipality verify
stormwater treatment and flow-control facilities, and impervious pavement
installations 3,000 ft2 and greater in area, are adequately maintained.
Municipalities must report the results of inspections to the Water Board annually.
Facilities you install as part of your project will be incorporated into the local
municipality’s verification program. This is a six-stage process:
1. Determine who will own the facility and be responsible for its
maintenance in perpetuity and document this in your Stormwater
Control Plan. The Stormwater Control Plan must also identify the
means by which ongoing maintenance will be assured (for example, a
maintenance agreement that runs with the land).
2. Identify typical maintenance requirements, allow for these requirements
in your project planning and preliminary design, and document the
typical maintenance requirements in your Stormwater Control Plan.
3. Prepare an Operations and Maintenance Plan (O&M Plan) for the site
incorporating detailed requirements for each treatment and flow-
control facility. Typically, a draft O&M Plan must be submitted with
the building permit application, and a final O&M Plan must be
submitted for review and approved by the municipality prior to building
permit final and issuance of a certificate of occupancy. Local
requirements vary as to schedule. Check with municipal staff.
4. Maintain the facilities from the time they are constructed until
ownership and maintenance responsibility is formally transferred.
Chapter 5
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5. Formally transfer operation and maintenance responsibility to the site
owner or occupant. A warranty, secured by a bond, or other financial
instrument, may be required to secure against lack of performance due
to flaws in design or construction. A typical warranty period should be
consistent with local municipality requirements.
6. Maintain the facilities in perpetuity and comply with your municipality’s
self-inspection, reporting, and verification requirements.
See the schedule for these stages in Table 5-1. Again, local requirements will vary.
TABLE 5-1. SCHEDULE FOR PLANNING OPERATION AND MAINTENANCE OF
STORMWATER TREATMENT AND FLOW-CONTROL FACILITIES
Stage 1: Ownership and Responsibility
Your Stormwater Control Plan must specify a means to finance and implement
maintenance of treatment and flow-control facilities in perpetuity.
Stage Description Where documented Schedule
1 Determine facility ownership
and maintenance responsibility
Stormwater Control Plan Discuss with planning staff
at pre-application meeting
2 Identify typical maintenance
requirements
Stormwater Control Plan Submit with planning &
zoning application
3 Develop detailed operations and
maintenance plan
O&M Plan Submit draft with Building
Permit application; final
due before building permit
final and applying for a
Certificate of Occupancy
4 Interim operations and
maintenance of facilities
As required by municipal
O&M verification program
During and following
construction including
warranty period
5 Formal transfer of operations &
maintenance responsibility
As required by municipal
O&M verification program
On sale and transfer of
property or permanent
occupancy
6 Ongoing maintenance and
compliance with inspection &
reporting requirements
As required by municipal
O&M verification program
In perpetuity
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Depending on the intended use of your site and the policies of the local
municipality, this may require one or more of the following:
Execution of a maintenance agreement that “runs with the land.”
Creation of a homeowner’s association (HOA) and execution of an
agreement by the HOA to maintain the facilities as well as an annual
inspection fee.
Formation of a new community facilities district or other special district,
or addition of the properties to an existing special district.
Dedication of fee title or easement transferring ownership of the facility
(and the land under it) to the municipality.
Ownership and maintenance responsibility for treatment and flow-control facilities
should be discussed at the beginning of project planning, typically at the pre-
application meeting for planning and zoning review. Experience has shown
provisions to finance and implement maintenance of treatment and flow-control
facilities can be a major stumbling block to project approval, particularly for small
residential subdivisions. (See “Applying C.3 to New Subdivisions” in Chapter 1.)
ʇ PRIVATE OWNERSHIP AND MAINTENANCE
The municipality may require—as a condition of project approval—that a
maintenance agreement be executed.
The CCCWP has prepared the following model agreements:
Operation and Maintenance Agreement for a Single Parcel with a
Stormwater Management Facility.
Operation and Maintenance Agreement for Subdivisions with
Stormwater Management Facilities.
Operation and Maintenance Agreement for Subdivisions with
Stormwater Management Facilities and a Homeowners Association.
CC&R and Subdivision Map Provisions for Subdivisions with
Stormwater Management Facilities.
CC&R Provisions for Subdivisions with Stormwater Management
Facilities and a Homeowners Association.
The model agreements “run with the land,” so the agreement executed by a
developer is binding on the owners of the subdivided lots. The agreement must be
recorded prior to conveyance of the subdivided property.
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The model agreements provide the municipality may collect a management and/or
inspection fee established by the standard fee schedule. In addition, the agreements
provide that, if the property owner fails to maintain the stormwater facility, the
municipality may enter the property, restore the stormwater facility to good working
order, and obtain reimbursement, including administrative costs, from the property
owner.
To augment and enforce maintenance requirements, the County established a two-
tiered Community Facilities District (Mello-Roos) throughout the unincorporated
area to cover the costs of inspections, reporting to the Water Board and, if
necessary, code enforcement and maintenance and repair of individual facilities.
Some cities and towns may have similar districts.
ʇ TRANSFER TO PUBLIC OWNERSHIP
Municipalities may sometimes choose to have a treatment and flow-control facility
deeded to the public in fee or as an easement and maintain the facility as part of the
municipal storm drain system. The municipality may recoup the costs of
maintenance through a special tax, assessment district, or similar mechanism.
Locating an IMP in a public right-of-way or easement
creates an additional design constraint—along with
hydraulic grade, aesthetics, landscaping, and
circulation. However, because sites typically drain to
the street, it may be possible to locate a bioretention
swale parallel with the edge of the parcel. The facility
may complement or substitute for an underground
storm drain system.
Even if the facility is to be deeded or transferred to the municipality after
construction is complete, it is still the responsibility of the builder to identify general
operations and maintenance requirements, prepare a detailed operation and
maintenance plan, and to maintain the facility until that responsibility is formally
transferred.
Stage 2: General Maintenance Requirements
Include in your Stormwater Control Plan a general description of anticipated facility
maintenance requirements. This will help ensure that:
Ongoing costs of maintenance have been considered in your facility
selection and design.
Site and landscaping plans provide for access for inspections and by
maintenance equipment.
Local
Requirements
Cities, towns, or the County may
have requirements that differ from,
or are in addition to, this countywide
Guidebook. See Appendix A
and check with local planning and
community development staff.
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Landscaping plans incorporate irrigation requirements for facility
plantings.
Initial maintenance and replacement of facility plantings is incorporated
into landscaping contracts and guarantees.
A fact sheet available on the CCCWP C.3 web page describes general maintenance
requirements for bioretention facilities.
Stage 3: Stormwater Facilities O&M Plan
Submit a draft O&M Plan with construction documents when you apply for permits
to begin grading or construction on the site. Revise your draft O&M plan in
response to any comments from your municipality, and incorporate new
information and changes developed during project construction. Submit a revised,
final O&M plan before construction is complete.
Your O&M Plan must be submitted to and approved by your municipality before
your building permit can be made final and a certificate of occupancy issued.
Your O&M Plan must be kept onsite for use by maintenance personnel and during
site inspections. It is also recommended that a copy of the Stormwater Control Plan
be kept onsite as a reference.
MRP 3.0 Provision C.3.h requires Contra Costa municipalities periodically verify
operations and maintenance (O&M) of facilities installed in their jurisdiction. Each
year, they must report to the Water Board the facilities inspected that year and the
status of each.
The final O&M Plan should incorporate solutions to any problems noted or
changes that occurred during construction. For this reason, the final O&M Plan
may be submitted at the end of the construction period, before the application for
final building permit and Certificate of Occupancy.
ʇ TOOLS AND ASSISTANCE
The following step-by-step instructions—and forms available on the CCCWP
website—will help you prepare your O&M Plan. You may use, adapt, and assemble
these documents to prepare your own O&M Plan, which will be customized to the
specific needs of your site.
The available tools and assistance includes:
A form for stating or updating key contact information for responsible
individuals.
A format for an Inspection and Maintenance Log.
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Sample contents of an inspector’s report.
A Fact Sheet incorporating a suitable maintenance plan for bioretention
facilities and flow-through planters.
Additional useful references, including links to additional documents, are available
in “References and Resources” at the end of this chapter.
ʇ YOUR O&M PLAN: STEP BY STEP
The following step-by-step guidance will help you prepare each required section of
your O&M Plan.
Preparation of the plan will require familiarity with your stormwater facilities as they
have been constructed and a fair amount of thinking through plans for their
operations and maintenance. The text and forms provided here will assist you, but
are no substitute for thoughtful planning.
ʇ STEP 1: DESIGNATE RESPONSIBLE INDIVIDUALS
To begin creating your O&M Plan, your organization must designate and identify:
The individual who will have direct responsibility for the maintenance of
stormwater controls. This individual should be the designated contact
with municipal inspectors and should sign self-inspection reports and
any correspondence with the municipality regarding verification
inspections.
Employees or contractors who will report to the designated contact and
are responsible for carrying out BMP O&M.
The corporate officer authorized to negotiate and execute any contracts
that might be necessary for future changes to O&M or to implement
remedial measures if problems occur.
Your designated respondent to problems, such as clogged drains or
broken irrigation mains, that would require immediate response should
they occur during off-hours.
It is recommended to use the form available on the CCCWP website to list this
information. Updated contact information must be provided to the municipality
immediately whenever a property is sold and whenever designated individuals
or contractors change. Complete a new form—and send a copy to the
municipality—whenever this occurs.
Draw or sketch an organization chart to show the relationships of authority and
responsibility between the individuals responsible for O&M. This need not be
elaborate, particularly for smaller organizations.
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Describe how funding for O&M will be assured, including sources of funds, budget
category for expenditures, process for establishing the annual maintenance budget,
and the process for obtaining authority should unexpected expenditures for major
corrective maintenance be required.
Describe how your organization will accommodate initial training of staff or
contractors regarding the purpose, mode of operation, and maintenance
requirements for the stormwater facilities on your site. Also, describe how your
organization will ensure ongoing training as needed and in response to staff changes.
ʇ STEP 2: SUMMARIZE DRAINAGE AND BMPS
Incorporate the following information from your Stormwater Control Plan into
your O&M Plan:
Figures delineating and designating pervious and impervious areas.
Figures showing locations of stormwater facilities on the site.
Tables of pervious and impervious areas served by each facility.
Review the Stormwater Control Plan narrative that describes each facility and its
tributary drainage area and update the text to incorporate any changes that may have
occurred during planning and zoning review, building permit review, or
construction. Incorporate the updated text into your O&M Plan.
ʇ STEP 3: DOCUMENT FACILITIES “AS BUILT”
Include the following information from final construction drawings:
Plans, elevations, and details of all facilities. Annotate if necessary with
designations used in the Stormwater Control Plan.
Design information or calculations submitted in the detailed design
phase (i.e., not included in the Stormwater Control Plan).
Specifications of construction for facilities, including sand or soil,
compaction, pipe materials, and bedding.
In the final O&M Plan, incorporate field changes to design drawings, including
changes to any of the following:
Location and layouts of inflow piping, flow splitter boxes, and piping to
offsite discharge.
Depths and layering of soil, sand, or gravel.
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Placement of filter fabric or geotextiles (not recommended between soil
and gravel layers of bioretention facilities).
Changes or substitutions in soil or other materials.
Natural soils encountered (e.g. sand or clay lenses).
ʇ STEP 4: PREPARE CUSTOMIZED MAINTENANCE PLANS
Prepare a maintenance plan, schedule, and inspection checklists (routine, annual,
and after major storms) for each facility. Plans and schedules for two or more similar
facilities on the same site may be combined.
Use the following resources to prepare your customized maintenance plan,
schedule, and checklists.
Specific information noted in Steps 2 and 3, above.
Other input from the facility designer, municipal staff, or other sources.
Operation and Maintenance Fact Sheet for Bioretention Facilities and
Flow-through Planters (available on the C.3 Web Page)
Note any particular characteristics or circumstances that could require attention in
the future and include any troubleshooting advice.
Also include manufacturers’ data, operating manuals, and maintenance
requirements for any:
Pumps or other mechanical equipment.
Proprietary devices used as or in conjunction with BMPs.
Manufacturers’ publications should be referenced in the text (including models and
serial numbers where available). Copies of the manufacturers’ publications should
be included as an attachment in the back of your O&M Plan or as a separate
document.
ʇ STEP 5: COMPILE O&M PLAN
Your O&M Plan should follow this general outline:
I. Inspection and Maintenance Log
II. Updates, Revisions and Errata
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III. Introduction
A. Narrative overview describing the site; drainage areas, routing, and
discharge points; and treatment and flow control facilities
IV. Responsibility for Maintenance
A. General
(1) Name and contact information for responsible individual(s)
(2) Organization chart or charts showing organization of the
maintenance function and location within the overall organization
(3) Reference to Operation and Maintenance Agreement (if any). A
copy of the agreement should be attached
(4) Maintenance Funding
(a) Sources of funds for maintenance
(b) Budget category or line item
(c) Description of procedure and process for ensuring adequate
funding for maintenance
B. Staff Training Program
C. Records
D. Safety
V. Summary of Drainage Areas and Stormwater Facilities
A. Drainage Areas
(1) Drawings showing pervious and impervious areas (copied or
adapted from Stormwater Control Plan)
(2) Designation and description of each drainage area and how flow is
routed to the corresponding facility
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B. Treatment and Flow Control Facilities
(1) Drawings showing location and type of each facility
(2) General description of each facility (Consider a table if more than
two facilities)
(a) Area drained and routing of discharge
(b) Facility type and size
VI. BMP Design Documentation
A. “As-built” drawings of each facility (design drawings in the draft O&M
Plan)
B. Manufacturers’ data, manuals, and maintenance requirements for
pumps, mechanical or electrical equipment, and proprietary facilities
(include a “placeholder” in the draft plan for information not yet
available)
C. Specific operation and maintenance concerns and troubleshooting
VII. Maintenance Schedule or Matrix
A. Maintenance Schedule for each facility with specific requirements for:
(1) Routine inspection and maintenance
(2) Annual inspection and maintenance
(3) Inspection and maintenance after major storms
B. Service Agreement Information
Assemble and make copies of your O&M Plan. One or more copies must be
submitted to the municipality, and at least one copy kept on site. Here are some
suggestions for formatting the O&M Plan:
Format plans to 8½ by 11 inches to facilitate duplication, filing, and
handling.
Include the revision date in the footer on each page.
Scan graphics and incorporate with text into a single electronic file. Keep
the electronic file backed-up so that copies of the O&M Plan can be
made if the hard copy is lost or damaged.
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ʇ STEP 6: UPDATES
Your O&M Plan will be a living document.
O&M personnel may change; mechanical equipment may be replaced, and
additional maintenance procedures may be needed. Throughout these changes, the
O&M Plan must be kept updated.
Updates may be transmitted to your municipality at any time. However, at a
minimum, updates to the O&M Plan must accompany the annual inspection report.
These updates should reference the sections of the O&M Plan being changed and
should be placed in reverse chronological order (most recent at the top) in Section
II of the binder. If the entire O&M Plan is updated, as it should be from time to
time, these updates should be removed from the first section, but may be filed
(perhaps in the back of the binder) for possible future reference.
Stage 4: Interim Operation & Maintenance
In accordance with MRP 3.0 Provision C.3.e.ii, include the following statement in
your Stormwater Control Plan:
The property owner accepts responsibility for interim operation and
maintenance of stormwater treatment and flow-control facilities until
such time as this responsibility is formally transferred to a subsequent
owner.
Applicants will typically be required to warranty stormwater facilities against lack of
performance due to flaws in design or construction following completion of
construction. The warranty may need to be secured by a bond or other financial
instrument. The warranty should be consistent with local municipality requirements.
Stage 5: Transfer Responsibility
As part of the final O&M Plan, note the expected date when responsibility for
operation and maintenance will be transferred. Notify your municipality when this
transfer of responsibility takes place.
Stage 6: Operation & Maintenance Verification
Each Contra Costa municipality implements a Stormwater Treatment Measures
Operation and Maintenance Verification Program, including periodic site
inspections.
Local stormwater ordinances state municipalities may require an annual certificate
of compliance certifying operations and maintenance of treatment and flow-control
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facilities. To obtain a certificate of compliance, the responsible party must request
and pay for an inspection from the municipality each year. Alternatively, owners or
lessees may arrange for inspection by a private company authorized by the
municipality. Based on the results of the inspection, the municipality may issue a
certificate, issue a conditional certificate requiring correction of noted deficiencies
by a specific date, or deny the certificate.
Some municipalities have established alternative procedures. Check with local staff
for requirements.
Design to Minimize Long-Term Maintenance
The design criteria on page 111 have been developed and refined, based on
accumulated experience, to ensure constructed bioretention facilities are robust and
resilient. When properly designed and constructed, bioretention facilities require
little intervention beyond cleanup, pruning, and occasional replanting, at a level of
effort similar to that required for any vegetated area.
Table 5-2 on the following page identifies how certain design criteria optimize
operation and minimize long-term maintenance needs.
ʇ TYPICAL MAINTENANCE PROGRAM
The Stormwater Facility Operation and Maintenance Fact Sheet: Bioretention
Facilities and Flow-through Planters is available on CCCWP’s Stormwater C.3
Guidebook web page. The fact sheet provides a typical maintenance program for
bioretention facilities. The same typical maintenance program is incorporated into
the template, also available on CCCWP’s Stormwater C.3 Guidebook web page, for
a Stormwater Facility O&M Plan.
The typical maintenance program includes:
General maintenance rules, including a prohibition on using synthetic
fertilizers, pesticides, or any soil amendments other than aged compost
mulch or the approved sand/compost mix.
Routine trash removal and weeding.
Observations and corrections following significant rain events.
Annual vegetation and other maintenance during winter.
Inspection prior to the start of the rainy season
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ʇ REFERENCES AND RESOURCES
Model Stormwater Ordinance (CCCWP, 2005)
Start at the Source (BASMAA, 1999) pp. 139-145.
Urban Runoff Quality Management (WEF/ASCE, 1998). pp 186-189.
Contra Costa Clean Water Program Vector Control Plan
TABLE 5-2. SUMMARY OF DESIGN CRITERIA adopted to ensure facility longevity and reduce required maintenance.
Feature
Page
# Operation and Maintenance-Related Benefit
Facility is in a high-visibility,
well-trafficked location
Facility is valued for aesthetic and other ancillary benefits and is more
likely to be maintained consistently
In subdivisions, facility is in an
accessible common area and not
on an individual lot
Avoids potential alterations to facility after construction and resulting
conflicts with individual homeowners over need to restore the facility
to original condition.
Consistent cross-section,
configuration, and specifications
for all bioretention facilities
throughout County
Facilitates inspection, evaluation, and repairs if needed.
Soil mix specification Avoids infiltration failure and ensures minimum infiltration rate
(facility treatment capacity) is achieved over the long term.
Underdrain pipe specifications Discharge elevation at top of gravel layer maximizes amount of treated
runoff that is stored and infiltrated. Holes facing down prevents
accumulation of soil within the underdrain pipe. Specified pipe can be
rooted if needed.
Plants are required Plant roots and associated biological activity keep soil pores open,
facilitating percolation and preventing blinding/clogging of the surface
and resulting loss of infiltration capacity. Aesthetic qualities of planted
areas help ensure owners’ attention to and engagement with the facility.
Biological activity helps break down and/or immobilize pollutants.
Gravel (Class 2 permeable)
specification
Resists migration of fines from overlying soil mix, eliminates need for
filter fabric (which tends to clog) or additional layer atop gravel.
Top of soil elevation is flat Maximizes surface reservoir, avoids rills in mulch and in bioretention
soil mix that result from flow.
Overflow is precast concrete
with frame and grate
Helps ensure overflow is at proper elevation, which ensures ponding,
rather than flow, across the entire facility surface. Resistant to
accidental damage (compared to an upturned plastic pipe).
Concrete curb or other
hardscaped rim delineates edge
of facility
Clearly shows facility boundary to guide landscape maintenance crews.
Helps prevent fine sediments from adjacent slopes from entering the
bioretention soil mix.
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Retrofitting with
Green Infrastructure
How to identify and evaluate opportunities to integrate
LID features and facilities into existing drainage systems
etrofitting streets and paved areas with LID is difficult. Elevations and grades
are fixed constraints—unlike a new development or fully redeveloped site,
where the layout and grades of future buildings, pavement, and landscape can
be adjusted during the design.
Some built locations present striking opportunities for retrofit. For many other
locations, retrofitting with LID is a practical impossibility.
In a retrofit, options for LID are mostly the same as in a land development project:
Convert impervious areas to landscape.
Replace impervious pavement with pervious pavement.
Disperse runoff from impervious areas to landscaped areas.
Intercept flow in an existing swale, gutter, or pipe, direct it to a
bioretention facility, and direct the underdrain and overflow from the
bioretention facility to a downstream storm drain, culvert, or swale.
Design guidance and criteria for these features and facilities are in Chapter 4.
Further design guidance can be found in references cited at the end of this
chapter.
This chapter will help guide the process of identifying and evaluating LID
opportunities in the built landscape.
Chapter 6
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Project Identification
The most cost-effective projects involve dispersing runoff from paved areas to
self-retaining areas via sheet flow, gutters, swales, or pipes. The receiving self-
retaining area needs to be large enough—the 2:1 impervious-to-pervious ratio
applies—and lower than the low point of the tributary impervious area. In an
urban setting, such potential opportunities are rare. When found, as they
sometimes are along landscaped medians or shoulders of suburban arterial
roadways, or in plazas, parks, and golf courses, the opportunity should be
investigated.
More typically, runoff from an existing catchment is diverted from the street or
gutter to a bioretention facility built at or near an existing storm drain inlet.
Follow these Steps
To identify and evaluate Green Infrastructure retrofit opportunities, follow
these steps:
1. Locate the low points (usually existing storm drain inlets).
2. Review existing and potential landscape use adjacent to low points.
3. Evaluate the tributary catchment.
4. Calculate minimum sizes of the planned LID feature or facility.
5. Sketch and evaluate a preliminary footprint of the feature or facility.
6. Check facility inlet and outlet elevations.
ʇ STEP 1: LOCATE LOW POINTS
Existing conventional drainage systems typically convey runoff via sheet flow and
gutters to storm drain inlets, which connect to underground pipes. These storm
drain inlets are candidate locations for LID features and facilities. Sometimes the
storm drain inlet itself can be repurposed as a bioretention facility overflow with the
same grate elevation.
Many municipal utility maps and geographic information system (GIS) maps include
the location and size of storm drain pipes, but unfortunately do not typically include
storm drain inlets. This makes the maps of little use for green infrastructure
planning. Fortunately, inlet locations can often be found using satellite and street
view imagery available online. A site visit may be needed to confirm inlet locations,
particularly if street curbs and parking lots are parked up in the images.
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ʇ STEP 2: REVIEW AREAS ADJACENT TO LOW POINTS
Most low points (typically storm drain inlets) are in locations where it isn’t practical
to retrofit the surrounding area for bioretention.
Many storm drain inlets are near street intersections—where sidewalks,
pedestrian crossings, utilities, and other uses converge, and space is at a
premium.
In parking lots, inlets are typically centered in the drive aisle.
Traffic medians and islands are often, but not always, located at high points within
the right-of-way and are rarely adjacent to storm drain inlets.
Some situations where inlet locations may create retrofit opportunities:
Excessive street width.
Wide parkway strip.
Abandoned turn lane or other lane.
Unused right-of-way at oddly configured intersection.
Triangular area within a roadway gore (nose).
Street narrowed (or to be narrowed) for pedestrian crossing (bulb-out).
Adjacent to a park or green space.
Adjacent to a utility easement
Unused/abandoned right-of-way, for example, from a realigned roadway
or former streetcar line.
Existing drainage swales or ditches, including short runs between culverts, are
typically ineligible to be converted for bioretention treatment because of restrictions
in Clean Water Act Sections 401 and 404.
ʇ STEP 3: EVALUATE THE TRIBUTARY CATCHMENT
Once a potential location for a bioretention facility has been identified, the next step
is to determine whether the facility can be sized adequately to receive the amount
of runoff draining to that location.
Storm drain inlets are seldom shown on municipal utility maps, and the areas
tributary to each inlet are generally not mapped. Typically, it is necessary to survey
and evaluate each catchment in the field.
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Catchment boundaries may be easy or difficult to discern. A field visit is typically
required, especially in areas with older infrastructure. On a street with a gradient, an
upgradient storm drain inlet may mark a boundary. Street crowns are usually
catchment boundaries, and are mostly, but not always, at the street centerline. In
flatter terrain, it may be helpful to use a rotating laser level to find high points along
a gutter line or to locate an off-center crown.
In neighborhoods built before about 1980, especially on alluvial slopes (common in
the San Francisco Bay Area), one storm drain inlet may receive runoff from an entire
block in a street grid. Or there may be additional inlets which were apparently added
later to solve nuisance flooding at low points. Also, look for concrete swales
connecting the drainage from the low corner of one block to the next block
downgradient.
The catchment typically extends to a grade break at the back of sidewalk. However,
in low-density residential neighborhoods, and in older commercial/industrial
neighborhoods, parcels may be configured to drain to the gutter via curb outlets or
via sheet flow over driveways. Look for these features to ascertain whether to
include the parcels in the tributary area. Estimate the relative imperviousness of the
parcel (typically 85-100% for commercial/industrial and 35-50% for low-density
residential).
To quickly estimate the catchment area, trace catchment boundaries in Google
Earth or other GIS.
ʇ STEP 4: CALCULATE MINIMUM FACILITY SIZES
For potential self-retaining areas, size at one-half the tributary equivalent impervious
area.
For bioretention facilities, multiply the tributary equivalent impervious area by 0.04.
This size is generally workable in parking lots, where stalls can be reconfigured or
eliminated to accommodate the facility.
Reduced sizing (less than 4% of tributary equivalent impervious area) can only be
used for road reconstruction projects that follow requirements outlined in MRP 3.0
Provision C.3.b.ii (5)(c), or that are non-regulated projects under C.3.b. For projects
that meet these requirement, bioretention sizing can be calculated using the
following sizing factor:
Sizing Factor = 0.00060 × MAP + 0.0086
Where MAP=Mean Annual Precipitation in inches, per Contra Costa County Public
Works Figure B-166.
This will provide a reasonable range for trial-sizing bioretention facilities to treat
impervious area drainage. Larger facilities will overflow less frequently and will
C H A P T E R 6 : R E T R O F I T T I N G W I T H G R E E N I N F R A S T R U C T U R E
9th Edition APRIL 12, 2024 113
provide more robust performance over time. However, the reduced sizing factor
calculation for bioretention facilities does not satisfy full trash capture requirements.
ʇ STEP 5: SKETCH AND EVALUATE A PRELIMINARY FACILITY FOOTPRINT
Edges—transitions between the bioretention soil surface and the surrounding
pavement—are often challenging design problems. Each facility requires its own
solutions. Here are some problems and considerations that are often encountered:
Slopes. The standard street section descends from crown to curb and
rises again to back of sidewalk. The street may slope in the longitudinal
direction as well. A bioretention facility typically requires that the top-of-
soil be flat and six inches below the elevation of the existing storm drain
inlet. As a result, the transition to the surrounding street and/or sidewalk
requires a perimeter curb or wall. Depending on the drop to the top of
soil, perimeter curbs or fences may be required to prevent vehicles or
pedestrians from falling into the facility. It is useful to estimate the
required wall heights when first envisioning how the bioretention facility
might fit into the existing topography. This can be done in the field by
checking existing elevations around the perimeter with a rotating laser
level and rod.
Traffic control. For bioretention facilities built as sidewalk extensions or
bulb-outs, the shape of the transition within the lane may be specified by
municipal standards.
Compatibility with plans for multi-modal transportation. Planned
upgrades to the street configuration—for traffic calming, road diet, bike
lanes, or “complete streets”—may conflict with the ideal bioretention
facility footprint. Bioretention facilities typically need to be at the gutter,
either extending into a parking lane or straddling the existing curb and
also replacing some parkway strip. Many bike lane configurations use this
same alignment along the gutter.
Property ownership or control. Whether to pursue a green infrastructure
retrofit at the location may depend on the quality of working
relationships with private parties, utilities, or other agencies having
jurisdiction. Sometimes the area near a storm drain (or even at the storm
drain) seems within the public right-of-way but is on a privately owned
parcel—or the area is under the jurisdiction of a municipal department
other than transportation, such as a parks department or surplus lands.
And sometimes the opportunity may exist to divert runoff to landscaped
area within an existing utility easement, or to extend a bioretention
facility into the easement.
C O N T R A C O S T A C L E A N W A T E R P R O G R A M
114 APRIL 12, 2024 9th Edition
Access for maintenance. Routine maintenance of bioretention facilities
requires the same tools and access as for other landscaping. Maintenance
access can be an issue for facilities on arterial streets, especially if a
temporary lane closure is required.
Water for irrigation. While not a requirement, an available connection to
water expands the choices of plant palette.
Utility conflicts. Existing subsurface utility lines can sometimes be
moved. Sometimes, utilities can be left in place and a bioretention facility
built around the line. However, large-diameter pipes or ducts can make
building at an otherwise promising location impracticable. And any
occurrence of utilities within the potential facility’s footprint will add to
project costs and potential delays.
Design, Construction, and Maintenance
Detailed design, construction, and maintenance of retrofit bioretention facilities—
including street retrofits—are generally the same as for facilities in newly developed
or redeveloped sites. For criteria and requirements, see Chapters 4 and 5 in this
Guidebook.
For additional design resources, including example details useful for integration into
streets and streetscapes, see the references and resources below and on the CCCWP
Green Infrastructure Planning Resources webpage.
ʇ REFERENCES AND RESOURCES
Chapter 4, Design and Construction of Bioretention Facilities and Other Integrated Management Practices
Chapter 5, Operation and Maintenance of Stormwater Management Facilities
San Francisco Public Utilities Public Utilities Commission Stormwater Management Requirements and Design
Guidelines Appendix B: Typical Details
CASQA/Central Coast Low Impact Development Institute Standard LID Design Plans and Specifications
City of San Jose Green Stormwater Infrastructure Maintenance Field Guide
S T O R M W A T E R C . 3 . C O M P L I A N C E
9th Edition APRIL 12, 2024 115
Bibliography
American Society of Civil Engineers. 1996.
American Society of Civil Engineers. Hydrology
Handbook, Second Edition. ASCE Manuals and
Reports on Engineering Practice No. 28. ISBN 0-
7844-0138-1. 784 pp.
Association of Bay Area Governments. 1986.
Manual of Standards for Erosion and Sediment
Control Measures.
Bay Area Stormwater Management Agencies
Association (BASMAA). 1999. Start at the Source:
Design Guidance Manual for Stormwater Quality. Tom
Richman and Associates. 154 pp. plus appendix.
(on CCCWP website)
BASMAA. 2003. Using Site Design Techniques to Meet
Development Standards for Stormwater Quality.
https://www.suisun.com/wp-content/files/Stormwater-Using-
Site-Design-Techniques.pdf
BASMAA. 2010. Special Projects Proposal.
Submitted to the California Regional Water
Quality Control Board for the San Francisco Bay
Region.
BASMAA. 2011. Green Roof Minimum
Specifications. Submitted to the California
Regional Water Quality Control Board for the San
Francisco Bay Region.
California Ocean Protection Council. 2008.
Resolution of the California Ocean Protection
Council Regarding Low Impact Development.
https://opc.ca.gov/webmaster/ftp/pdf/agenda_items/200805
15/05_LID/0805COPC05_%20LID%20Res%20amended.pdf
California Stormwater Quality Association
(CASQA). 2003. California Stormwater BMP
Handbooks. Four Handbooks: New Development and
Redevelopment, Construction, Municipal, and
Industrial/Commercial.
Contra Costa County. Watershed Atlas. November
2003. 152 pp. 11" x 17".
Contra Costa Clean Water Program (CCCWP).
2012. Model Stormwater Management Ordinance.
CCCWP. 2004. Vector Control Plan. 1 June 2004,
18 pp.
CCCWP. 2005. Hydrograph Modification Management
Plan. 15 May 2005.
CCCWP. 2006. Policy for C.3 Compliance for
Subdivisions. 15 February 2006, 3 pp.
Ferguson, Bruce K. 2005. Porous Pavements. CRC
Press.
Federal Interagency Stream Restoration Working
Group. 1998. Stream Restoration: Principles, Processes,
and Practices.
https://directives.sc.egov.usda.gov/OpenNonWebContent.asp
x?content=34805.wba
Low Impact Development Center. 2006. LID for
Big-Box Retailers. 75 pp.
National Association of City Transportation
Officials. 2017. Urban Street Stormwater Guide. Island
Press. 168 pp.
Prince George’s County, Maryland. 1999. Low-
Impact Development Design Strategies: An Integrated
Design Approach. Department of Environmental
Resources, Programs and Planning Division. June
1999. 150 pp.
Prince George’s County, Maryland. 2007.
Bioretention Manual. Department of Environmental
Resources, Programs and Planning Division.
Riley, Ann. 1998. Restoring Streams in Cities. Island
Press, Washington, DC. 425 pp.
California Regional Water Quality Control Board
for the San Francisco Bay Region. 2015. Water
Quality Control Plan for the San Francisco Bay
Basin.
California Regional Water Quality Control Board
for the Central Valley Region. 2016. Water Quality
Control Plan for the Sacramento and San Joaquin
River Basins.
California Regional Water Quality Control Board
for the San Francisco Bay Region. 2022. Municipal
Regional Stormwater NPDES Permit. Order R2-
2022-0018.
Salvia, Samantha. 2000. “Application of Water-
Quality Engineering Fundamentals to the
Assessment of Stormwater Treatment Devices.”
Santa Clara Valley Urban Runoff Pollution
Prevention Program. Tech. Memo, 15 pp.
Schueler, Tom. 1995. Site Planning for Urban Stream
Protection. Environmental Land Planning Series.
C O N T R A C O S T A C L E A N W A T E R P R O G R A M
116 APRIL 12, 2024 9th Edition
Metropolitan Washington Council of
Governments. 232 pp.
StopWaste.org. 2008. Bay Friendly Landscape
Guidelines.
USEPA. 2009a. Green Roofs for Stormwater Runoff
Control.
USEPA. 2009b. Technical Guidance on Implementing
the Stormwater Runoff Requirements for Federal Projects
under Section 438 of the Energy Independence and Security
Act. EPA 841-B-09-001
WEF/ASCE. 1998. Water Environment
Foundation/American Society of Civil Engineers.
Urban Runoff Quality Management. WEF Manual
of Practice No. 23, ASCE Manual and Report on
Engineering Practice No. 87. ISBN 1-57278-039-8
ISBN 0-7844-0174-8. 259 pp.
9th Edition – APRIL 12, 2024
Local Exceptions and Additional
Requirements
Municipality-specific procedures, policies, and submittal requirements.
Obtain from your municipal planning and community development department.
The Contra Costa Clean Water Program C.3 web page includes links to each Contra Costa
municipality’s C.3 information.
Appendix A
9th Edition – APRIL 12, 2024
9th Edition – APRIL 12, 2024
Plant Recommendations for
Bioretention Facilities and Planter Boxes
Appendix B
Appendix B — Plant Recommendations for Bioretention Facilities and Planter Boxes
9th Edition — APRIL 12, 2024 B-1 Contra Costa Clean Water Program
Grasses and Grass-like Plants
Scientific name
Common name
Light Preference Size (feet) Watering ToleratesCA
Native Other Notes Sun Part Shade Ht. Width L M H Summer Heat Coast Flood Wind
Bromus carinatus
California brome 92 1 9 ok 99 9 9
Bouteloua gracilis
blue grama 91.5 1 9 99 9
Tolerates no summer water, good for non-
irrigated remote sites
Carex densa
dense sed e 91 1 99 9999
Carex obnupta
slou h sed e 92 1 99 99 99 9 9
Carex praegracilis
clustered field sed e 9 91.5 1.5 99 99 99 9 9
Carex subfusca
rust sed e 9 91 1 9ok 9 99 9 9 Great for swales
Carex divulsa
Berkele sed e 991 1 9ok 99 9 9 AKA Carex tumulicola,. Full sun along
coast.
Deschampsia
cespitosa
tufted hair rass 92 1 9ok 9 9 9 Can look weed
Distichlis spicata
salt rass 90.3 3 99 99 99 9 9 Looks like bermuda grass, withstands foot
traffic, for soils with hi h salt
Eleocharis palustris
creepin spikerush 91 1 99ok 9 99 9 9
Elymus glaucus
blue wildr e 91.5 2 99ok 9 99 9 9 good for grazing, difficult to mow, messy
lookin lawn
Festuca californica
California fescue 9 992 2 9ok 9 99 9
Festuca idahoensis
Idaho fescue 9 91 1 9 9ok 9 99 9 Can mow. Needs light summer water at hot
sites
Festuca rubra
red fescue 9 91 1.5 9 9ok 9 99 9 9 Can mow. Lawn alternative
Festuca rubra 'molate'
molate fescue 9 91 1.5 9 9ok 9 99c Can mow. Lawn alternative
Appendix B — Plant Recommendations for Bioretention Facilities and Planter Boxes
9th Edition — APRIL 12, 2024 B-2 Contra Costa Clean Water Program
Grasses and Grass-like Plants
Scientific name
Common name
Light Preference Size (feet) Watering ToleratesCA
Native Other Notes Sun Part Shade Ht. Width L M H Summer Heat Coast Flood Wind
Hordeum
brachyantherum
meadow barle 9 91.5 1 99ok 9 99 9
Juncus patens
blue rush 92 1 99 9999
Leymus triticoides
creepin wildr e 9 93 1 9 9ok 9 99 9 9 Can mow. Recommended for swales.
Melica californica
California melica 9 91 1 9 99 9
Melica imperfect
melic 9 91 1 9ok 999 Part shade inland, light water in Summer to
keep reen or oes dormant
Muhlenbergia rigens
deergrass 93 3 9 9ok 999
Nasella pulchra
purple needle rass 9 92 1 9 9ok 99 9 9
Nassella lepida
foothill needle rass 9 991.5 1 9 9ok 9 99 9
Phalaris californica
California canar rass 991.5 1 99ok 99 9 9 Can be a ressive spreader
Appendix B — Plant Recommendations for Bioretention Facilities and Planter Boxes
9th Edition — APRIL 12, 2024 B-3 Contra Costa Clean Water Program
Herbaceous Perennials and Groundcovers
Scientific name
Common name
Li ht Preference Size feet Waterin ToleratesCA
Native Other Notes Sun Part Shade Ht. Width L M H Summer Heat Coast Flood Wind
Achillea filipendulina
fernleaf arrow 93 3 999
Achillea millefolium
common arrow 91.5 1 9ok 9 9 Good for hot sites
Achillea tomentosa
woolly yarrow 9 91 1.5 9 9ok 99
Aloe striata
coral aloe 9 92 2 9ok
Sun along coast, afternoon
shade inland
Arctostaphylos
hookeri
Montere manzanita 9 91 4 9 9ok 99 9 Better in part shade in hot sites
Arctostaphylos uva-
ursi
kinnick-kinnick 9 91 15 9 9ok 99 9
Full sun at coast, part shade inland.
Cultivars to try include 'emerald carpet,'
'Point Reyes,' 'San Bruno Mountain'
dependin on site
Ceratostigma
plumbaginoides
dwarf plumba o 90.75 5 9 999
Epilobium canum
California fuchsia 9 91 4 9ok 9
Eriogonum
fasciculatum
flattop buckwheat 93 4 9 9 9 Eschscholzia
californica
California popp 91 1 9ok 9 99 9 9
Fragaria chiloensis
beach strawberries 9 990.3 2 9ok 9 9
Gazania spp.
treasure flower 90.5 2 9 9999
Iris douglasiana
Dou las iris 9 91.5 2 9 9ok 99 9 Also, Iris h brids
Appendix B — Plant Recommendations for Bioretention Facilities and Planter Boxes
9th Edition — APRIL 12, 2024 B-4 Contra Costa Clean Water Program
Herbaceous Perennials and Groundcovers
Scientific name Li ht Preference Size feet Waterin ToleratesCA
Native Other Notes Common name Sun Part Shade Ht. Width L M H Summer Heat Coast Flood Wind
Lotus scoparius
deerweed 94 3 9 999
Lupinus bicolor
miniature lupine 91 1 9 999 Adds nitro en
Mimulus aurantiacus
common
monke flower 9 93 3 9ok 99
Mimulus cardinalis
scarlet monke flower 9 993 3 99 9 99 A ressive seeder
Polygonum capitatum
pink knotweed 9 90.5 4 999 99
Prunella vulgaris
self heal 9 9 9 9ok 99 9 9
Rudebeckia californica
California coneflower 93 2 9 9ok 999
Salvia clevelandii
Cleveland sa e 9
Scaevola 'mauve
clusters'
fan flower 9 91 4 9 99
Sedum spathulifolium
stone crop 9 9ok 99varies For above the hi h water line
Sisyrinchium bellum
blue e ed rass 1 1 9ok 9 99 9 9
Sisyrinchium
californicum
yellow e ed rass 9 91 1 999 99 9 9
Solidago californica
California oldenrod 93 2 9 9ok 999
Stachys byzantine
lamb's ears 9 91 3 9ok 9 99
Verbena tenuisecta
moss verbena 90.5 5 9ok 9 99
Appendix B — Plant Recommendations for Bioretention Facilities and Planter Boxes
9th Edition — APRIL 12, 2024 B-5 Contra Costa Clean Water Program
Small Shrubs
Scientific name
Common name
Li ht Preference Size feet Waterin ToleratesCA
Native Other Notes Sun Part Shade Ht. Width L M H Summer Heat Coast Flood Wind
Artemisia californica
California sa ebrush 92-5 4-5 9 9 99 9 Will not tolerate sprinklers
Baccharis pilularis
'Twin Peaks' or
Pigeon Point'
dwarf co ote brush 92 6 9 9ok 9 99 9c
Cistus skanbergii
h brid rockrose 93 5 9 999 99 9 Best with annual shearin
Correa 'Carmine Bells'
or 'ivory bells'
Australian fuchsia 9 93 6 9 9999
Ivory bells does not tolerate wind. Attracts
hummingbirds. Sunset Zones 16-17 (not
recommended for E. Contra Costa)
Erigeron glaucus
seaside dais 91 1.5 ok 9 9
Eriogonum crocatum
saffron buckwheat 91.5 1.5 9 9 99 9
Eriogonum
umbellatum
sulfur buckwheat 90.7 3 9ok 99 9
Grevillea lanigera
woolly grevillea 94 6 9 99 Sunset Zones 15-24 (not recommended for
E. Contra Costa)
Lavendula spp.
lavender 91.5 1.5 9ok 9 9
Mahonia pinnata
California holl rape 9 994 4 9 9 99 9 9
Mahonia repens
creeping Oregon
rape 9 92 3 9 9ok 999
Rosmarinus officinalis
rosemar 92.5 5 999 99
Rubus ursinus
California blackberr 993 5 99ok 9 99 9 9 Thorns. Harbors beneficial insects
Appendix B — Plant Recommendations for Bioretention Facilities and Planter Boxes
9th Edition — APRIL 12, 2024 B-6 Contra Costa Clean Water Program
Small Shrubs
Scientific name
Common name
Li ht Preference Size feet Waterin ToleratesCA
Native Other Notes Sun Part Shade Ht. Width L M H Summer Heat Coast Flood Wind
Symphorocarpos
albus
common snowberr 9 994 4 9 99ok 9 9 Adaptable to man conditions
Westringia fruticosa
coast rosemar 94 8 9 9 99
Whipplea modesta
whipplevine 990.5 3 99 9999
Sunset zones 16-17, 19-24 only (not
recommended E. Contra Costa), best for
moist shady spots
Large Shrubs
Scientific name
Common name
Li ht Preference Size feet Waterin ToleratesCA
Native Other Notes Sun Part Shade Ht. Width L M H Summer Heat Coast Flood Wind
Alyogyne huegelil
blue hibiscus 96 5 9 9
Very low water after second year, Sunset
zones 15-17 & 20-24 (not recommended E.
Contra Costa
Arctostaphylos
densiflora 'Howard
Mcminn'
McMinn manzanita 9 93 7 9 99c
Baccharis pilularis
co ote brush 96 7 9 9ok 9 99 9 Fast-rowin , short-lived
Berberis darwinii
Darwin's barberr 9 96 6 9 99 9 Sprinklers will kill folia e
Carpenteria californica
Bush anemone 9 96 4 9 999 9 Interior climate with occasional water
otherwise low water needs
Ceanothus spp.
Various ceanothus 9 9varies varies 9 99 9 fast-rowin but short-lived
Cercis occidentalis
western redbud 912 8 9 99 9 9 Prune low branches for small tree form,
susceptible to disease if overwatered
Cotinus coggygia
smoke bush 915 15 9 9 9 No water after second ear
Appendix B — Plant Recommendations for Bioretention Facilities and Planter Boxes
9th Edition — APRIL 12, 2024 B-7 Contra Costa Clean Water Program
Large Shrubs
Scientific name
Common name
Li ht Preference Size feet Waterin ToleratesCA
Native Other Notes Sun Part Shade Ht. Width L M H Summer Heat Coast Flood Wind
Eriogonum
arborescens
Santa Cruz Island
buckwheat 93 5 999 99 9 9 Low water after second year
Eriogonum giganteum
St. Catherines lace 95 6 9 99 9 9 best at coast, tolerant of unwatered inland
arden
Fremontodendron
californicum
flannel bush 920 14 9 999 Fast-rowin , short-lived
Garrya elliptica
Coast silktassel 9 98 8 9 9999 9 9 'Evie' is compact variet
Heteromeles
arbutifolia
to on 9 997 5 9 999 999 Doesn't respond well to pruning low
branches
Juniperus chinensis
'Mint Julep"
mint ulep uniper 9 93 6 9 999 99 9
Lonicera hispidula
California honeysuckle 9 994 2 99 9999 Climbing vine-like. Best in part shade.
Attracts birds
Lonicera involucrate
twinberr hone suckle 9 996 3 99 9999 Best in part shade. Attracts birds
Nandina domestica
heavenl bamboo 9 94 3 9 9999
Philadelphus
coronaries
sweet mock oran e 9 910 10 99 9 Best with annual prunin
Physocarpus capitatus
Pacific ninebark 9 95 5 9 99ok 999 Part shade and summer water required in
hot locations
Pittosporum
eugeniodes
Pittosporum 9 940 15 9 9999 9 shear to control height
Pittosporum
tenuifolium
Pittosporum 9 940 15 9 9999 9 shear to control height
Appendix B — Plant Recommendations for Bioretention Facilities and Planter Boxes
9th Edition — APRIL 12, 2024 B-8 Contra Costa Clean Water Program
Large Shrubs
Scientific name
Common name
Li ht Preference Size feet Waterin ToleratesCA
Native Other Notes Sun Part Shade Ht. Width L M H Summer Heat Coast Flood Wind
Prunus illicifolia
holl leaf cherr 9 915 15 9 9 9 99 9 9
Prunus lyonii
Catalina cherr 9 915 15 9 9 9 99 9 9
Rhamnus californica
California coffeeberr 9 93-15 6 9999 9 9 'Eve Case' is compact with broad folia e
Rhus integrifolia
lemonade berr 9 98 6 9999 9 Shear to hed e if desired
Ribes malvaceum
chaparral currant 9 95 5 9 9ok 9 9
Ribes sanguineum
flowerin currant 995-12 5-12 9 999 999 Needs ood air movement to avoid white fl
Ribes speciosum
fuchsia-flowered
ooseberr 9 993-6 3-6 9 999 999
Rosa californica
California wild rose 9 93 3-6 99ok 9 99 9 9 hooked thorns not compatible with foot
traffic
Rosa gymnocarpa
wood rose 9 92 3 9ok 9 999
Vitis californica
California rape 9 910 2-10 9 999 99 9 9 Climbing vine. Best in full sun. Can be
a ressive in moist area.
Vitis girdiana
desert rape 98 2-11 9 9999 9 9 Climbing vine. May be more suited to
biofilter soils than californica.
Small Trees
Scientific name
Common name
Light Preference Size (feet) Watering ToleratesCA
Native Other Notes Sun Part Shade Ht. Width L M H Summer Heat Coast Flood Wind
Acer Negundo
box elder 9 9 9 30 30 9 9 ok 9 9 9 9 9 Tough shade tree, deciduous
Arbetus unedo
strawberry tree 9 9 9 9 9 9 9 9 ‘Elfin King’ is dwarf from 6' tall
Appendix B — Plant Recommendations for Bioretention Facilities and Planter Boxes
9th Edition — APRIL 12, 2024 B-9 Contra Costa Clean Water Program
Small Trees
Scientific name
Common name
Li ht Preference Size feet Waterin ToleratesCA
Native Other Notes Sun Part Shade Ht. Width L M H Summer Heat Coast Flood Wind
Arctostaphylos
manzanita
common manzanita 9 6-15 8-12 9 9 9 9
Prune to be small tree. “Dr. Hurd” is more
tolerant of summer water.
Cercis occidentalis
western redbud 9 9 12 8 9 9 9 9Prune low branches for small tree form;
susceptible to disease if overwatered.
Eriobotrya deflexa
bronze loquat 9 9 18 25 9 9 9 9 9 Monthl deep waterin
Eriobotrya japonica
Japanese loquat 9 9 25 20 9 9 99 9 Susceptible to bli ht under stress
Fraxinus angustfolia
Ra wood ash 9 30 30 9 99 Fall color
Fraxinus dipetala
California ash 9 9 20 20 ok 9 9 9
Fraxinus latifolia
Ore on ash 9 99 30 25 9 9 9 9 9 9
Fraxinus velutina
velvet ash 9 25 15 9 9 ok9 9 9
Garrya elleptica
coast silk tassel 9 920 20 9 9 ok 9 Afternoon shade inland, responds well to
prunin
Laurus ‘Saratoga’
h brid laurel 9 912-40 12-40 9 9 9 9 prune for tree form
Myrica californica
Pacific wax myrtle 9 9910-30 10-30 9 9 9 best at coast
Pinus thumbergiana
Japanese black pine 9 925 20 9 99 9 9Asymmetrical, often leaning habit
Pittosporum
undulatum
victorian box 9 915 15 9 9 99
Sunset zones 16-17, 21-24 only (not
recommended E. Contra Costa. Prune low
branches for tree form.
Prunus ilicifolia
holl leaf cherr 9 915 15 9 9 9 9 9 9
Prunus Iyonii
Catalina cherr 9 915 15 9 9 9 9 9 9
Appendix B — Plant Recommendations for Bioretention Facilities and Planter Boxes
9th Edition — APRIL 12, 2024 B-10 Contra Costa Clean Water Program
Small Trees
Scientific name
Common name
Li ht Preference Size feet Waterin ToleratesCA
Native Other Notes Sun Part Shade Ht. Width L M H Summer Heat Coast Flood Wind
Prunus serrulata
“shirofugen’
cherr 9 25 25 9 99 9 Additional cultivars
Key
Water Preference-
Low/Moderate/High
We have provided recommendations for irrigation. All plants should be watered with more frequency during the first two years after planting. After this establishment period,
Low water use plants will only need supplemental irrigation at the hottest and driest sites. Plants with Moderate irrigation needs will be best with occasional supplemental
water (once per week to once per month) and plants with High irrigation needs will be best with more frequent watering especially during periods of drought in the cooler
seasons. Water Preference-
Summer Irrigation
Plants with a check in this column will not withstand a long period of summer drought without irrigation. Plants with an 'ok' in this column are tolerant of, but do not require,
frequent summer irrigation. Plants with nothing in this column may not tolerate summer irrigation.
Tolerates Heat A check in the heat column indicates that the plant will tolerate hot sites. It should not be confused with a plants preference for sun. Absence of the check indicates it should
only be used in areas close to the Bay or other cool sites.
Tolerates Coast The coast column indicates plants that perform well within 1,000 feet of the ocean or bay. Most of these plants
tolerate some amount of salt air, fog, and wind.
Tolerates Flooding
Tolerates Wind A check in the wind column means that the plant will tolerate winds of ten miles per hour or more.
CA Native - c Cultivar of California native. Cultivars offer habitat benefits to native wildlife and are adapted to the local climate but have reduced genetic diversity.
Other Notes - Sunset
Climate Zones
Under the Other Notes category, we have indicated appropriate Sunset Climate Zones only for plants that will not do well across all of Contra Costa County. Please refer to
the Sunset Western Garden Book which defines climate zones in the Bay Area based on elevation, influence of the Pacific Ocean, presence of hills and other factors.
9th Edition – APRIL 12, 2024
9th Edition – APRIL 12, 2024
Preparing a Stormwater Control Plan
for a Small Land Development Project
Instructions and template for preparing a submittal for a project creating or replacing more
than 2,500 square feet but less Than 5,000 square feet of impervious area (10,000
square feet for one single-family residence that is not a part of a larger plan of development)
The template is available in Word format on the Contra Costa Clean Water Program website.
Appendix C
APPENDIX C 9th Edition — APRIL 12, 2024 C-1
Preparing a
Stormwater Control Plan
for a Small Land Development Project
ʇ INTRODUCTION
Development projects that create or replace 2,500 square feet or more of impervious surface (roofs
or pavement) must incorporate one or more specified measures to reduce runoff. The type and
extent of runoff-reduction measures required for any specific project will be determined by local
staff consistent with a maximum extent practicable standard.
Projects that create or replace 5,000 square feet or more (the threshold is 10,000 square feet or more
for one single-family home that is not part of a larger plan of development) of impervious surface
are “Regulated Projects,” and require a more comprehensive Stormwater Control Plan. See the
Contra Costa Clean Water Program (CCCWP) Stormwater C.3 Guidebook.
These requirements are part of municipalities’ comprehensive effort to reduce runoff pollution. The
“Small Projects” requirement is mandated by Provision C.3.i. in the California Regional Water
Quality Control Board for the San Francisco Bay Region’s Municipal Regional Stormwater Permit.
It is fairly easy to achieve compliance with the stormwater requirements for small land development
projects. Compliance for each project must be carefully documented. Please complete the following
form and submit it as directed by municipal staff.
ʇ STEP-BY-STEP INSTRUCTIONS
1. Fill out the Project Data Form (below) and select one or more runoff reduction measures.
2. Prepare a site plan or sketch. Specify and design the runoff reduction measures you will use to
meet the stated minimum requirements.
3. Complete your submittal, which will include:
Project Data Form
Site Plan or Sketch
Completed checklist for each Runoff Reduction Measure selected
APPENDIX C 9th Edition — APRIL 12, 2024 C-2
ʇ STEP 1: PROJECT DATA FORM AND RUNOFF REDUCTION MEASURE SELECTION
Complete all fields.
Project Name/Number
Application Submittal Date
[to be verified by municipal staff]
Project Location
[Street Address if available, or intersection and/or
APN]
Name of Owner or Developer
Project Type and Description
[Examples: “Single Family Residence,” “Parking Lot
Addition,” “Retail and Parking”]
Total Project Site Area (acres)
Total New Impervious Surface Area (square feet)
[Sum of currently pervious areas that will be covered
with new impervious surfaces]
Total Replaced Impervious Surface Area
[Sum of currently impervious areas that will be
covered with new impervious surfaces.]
Total Pre-Project Impervious Surface Area
Total Post-Project Impervious Surface Area
Runoff Reduction Measures Selected
(Check one or more)
1. Disperse runoff to vegetated area
2. Pervious pavement
3. Cisterns or Rain Barrels
4. Bioretention Facility or Planter Box
ʇ STEP 2: DELINEATE IMPERVIOUS AREAS AND LOCATIONS OF RUNOFF REDUCTION MEASURES
Delineate the impervious area. On a site plan or sketch, show the impervious area—for example, a
roof, or portion of a roof, or a paved area—that will drain to your runoff reduction measure.
Typically these delineations follow roof ridge lines or grade breaks. Alternatively, show the type and
extent of pervious paving. An example sketch is attached.
Indicate the location and kind of runoff reduction measure you have selected. At least one
option, designed to manage runoff from some amount of impervious area—or to avoid creating
runoff—is required.
APPENDIX C 9th Edition — APRIL 12, 2024 C-3
For each option selected, there is a brief checklist to confirm your design and your submittal meet
minimum requirements.
ʇ STEP 3: COMPLETE AND SUBMIT YOUR PLAN
Consult with municipal staff about when and how to submit your Stormwater Control Plan for
Small Projects.
Option 1: Disperse runoff from roofs or pavement to vegetated areas.
This is the simplest option. Downspouts can be directed to vegetated areas adjacent to buildings, or
extended via pipes to reach vegetated areas further away. Paved areas can be designed with curb
cuts, or without curbs, to direct flow into surrounding vegetation.
On the site plan, show:
Each impervious area from which runoff will be
directed, and its square footage.
The vegetated areas that will receive runoff, and the
approximate square footage of each.
If necessary, explain in notes on the plan how runoff
will be routed from impervious surfaces to vegetated
areas.
Confirm the following standard specifications are met:
Tributary impervious square footage in no instance
exceeds twice the square footage of the receiving
pervious area.
Roof areas collect runoff and route it to the receiving pervious area via gutters and
downspouts.
Paved areas are sloped so drainage is routed to the receiving pervious area.
Runoff is dispersed across the vegetated area (for example, with a splash block) to avoid
erosion and promote infiltration.
Vegetated area has amended soils, vegetation, and irrigation as required to maintain soil
stability and permeability.
Any drain inlets within the vegetated area are at least 3 inches above surrounding grade.
Connecting a roof leader to a vegetated area. The
head from the eave height makes it possible to route
roof drainage some distance away from
the building.
APPENDIX C 9th Edition — APRIL 12, 2024 C-4
Option 2: Permeable Pavement
This option can be easy to install and maintain, cost-effective,
and can add aesthetic value to your project. Permeable
pavements may include pervious concrete, pervious asphalt,
porous pavers, crushed aggregate, open pavers with grass or
plantings, open pavers with gravel, or solid pavers.
Show on your site plan:
Location, extent and types of pervious pavements.
Confirm the following standard specifications are met:
No erodible areas drain on to permeable pavement.
Subgrade compaction is minimal.
Reservoir base course is of open-graded crushed stone. Base depth is adequate to retain
rainfall (3 inches is adequate) and support design loads (more depth may be required).
No subdrain is included or, if a subdrain is included, outlet elevation is a minimum of
3 inches above bottom of base course.
Subgrade is uniform and slopes are not so steep that subgrade is prone to erosion.
Rigid edge is provided to retain granular pavements and unit pavers.
Solid unit pavers, if used, are set in sand or gravel with minimum 3/8-inch gaps between the
pavers. Joints are filled with an open-graded aggregate free of fines.
Permeable concrete or porous asphalt, if used, are installed by industry-certified
professionals according to the vendor’s recommendations.
Selection and location of pavements incorporates Americans with Disabilities Act
requirements (if applicable), site aesthetics, and uses.
APPENDIX C 9th Edition — APRIL 12, 2024 C-5
Option 3: Cisterns or Rain Barrels
Use of cisterns or rain barrels to comply with this requirement is subject to municipality approval.
Planning and Building Permits may be required for larger systems.
Show on your site plan:
Impervious areas tributary to each cistern or rain barrel.
Location of each cistern or rain barrel.
Confirm the following standard specifications are met:
Rain barrels are sited at grade on a sound and level surface at or near gutter downspouts.
Gutters tributary to rain barrels are screened with a leaf guard or maximum 1/2-inch to
1/4-inch-minimum corrosion-resistant metallic hardware fabric.
Water collected will be used for irrigation only.
Openings are screened with a corrosion-resistant metallic fine mesh (1/16 inch or smaller) to
prevent mosquito harborage.
Large openings are secured to prevent entry by children.
Rain barrels and gutters are to be cleaned annually.
The Contra Costa Mosquito and Vector Control District (District) is informed of the
installation. The District will be provided additional information and/or rights of entry if
requested.
APPENDIX C 9th Edition — APRIL 12, 2024 C-6
Option 4: Bioretention Facility or Planter Box
An above-ground planter box may be appropriate if the
development site lacks level landscaped areas for dispersion
and pervious pavements are not practical. Planter boxes and
bioretention facilities can treat runoff from impervious
surfaces 25 times their area (sizing factor of 0.04).
Detailed design guidance for planter boxes and bioretention
areas is in the CCCWP Stormwater C.3 Guidebook.
Show on your site plan:
Impervious areas tributary to the planter box.
Location and footprint of planter box.
Confirm the following standard specifications are met:
Reservoir depth is 4 to 6-inch minimum.
18-inch depth soil mix with minimum long-term infiltration rate of 5 inches per hour. See
Stormwater C.3 Guidebook - Contra Costa Clean Water Program (cccleanwater.org)for a
list of soil mix suppliers.
Surface area of soil mix is a minimum 0.04 times the tributary impervious area.
“Class 2 perm” drainage layer 12 inches deep.
No filter fabric.
Perforated pipe (PVC SDR 35 or approved equivalent) underdrain with outlet located flush
or nearly flush with planter bottom.
Connection with sufficient head to storm drain or discharge point.
Underdrain has a clean-out port consisting of a vertical, rigid, non-perforated PVC pipe,
connected to the underdrain via a sweep bend, with a minimum diameter of 4 inches and a
watertight cap.
Overflow outlet connected to a downstream storm drain or approved discharge point.
Planter is set level.
Emergency spillage will be safely conveyed overland.
Plantings are suitable to the climate, exposure, and a well-drained soil.
Irrigation system with connection to water supply, on a separate zone.
Flow-through planter built into a hillside. Flows from
the underdrain and overflow must be directed in
accordance with local requirements.
APPENDIX C 9th Edition — APRIL 12, 2024 C-7
Useful Resources
The following references may be useful for design. Designs must meet the minimum standard
specifications in this supplement to the Stormwater C.3 Guidebook.
Contra Costa Clean Water Program Stormwater C.3 Guidebook. Available at Stormwater C.3 Guidebook - Contra Costa Clean Water
Program (cccleanwater.org)
Start At the Source: Design Guidance Manual for Stormwater Quality. Bay Area Stormwater Management Agencies Association, 1999.
Available at Foreword (cccleanwater.org)
Slow It, Spread It, Sink It: A Homeowner’s Guide to Turning Runoff into a Resource. Resource Conservation District of Santa Cruz County.
2nd Ed., 2015. https://www.rcdsantacruz.org/images/brochures/pdf/HomeDrainageGuide.v25.pdf
National Ready Mix Concrete Association
http://www.perviouspavement.org/
Interlocking Concrete Pavement Institute
http://www.icpi.org/
Porous Pavements, by Bruce K. Ferguson. 2005. ISBN 0-8493-2670-2
APPENDIX C 9th Edition — APRIL 12, 2024 C-8
Example Sketch
The example below illustrates the level of detail required.
16’
25’
10’
Not to Scale
9th Edition – APRIL 12, 2024
9th Edition – APRIL 12, 2024
Pollutant Sources/
Source Control Checklist
Appendix D
APPENDIX D — STORMWATER POLLUTANT SOURCES/SOURCE CONTROL CHECKLIST
9th Edition — APRIL 12, 2024 D-1 Contra Costa Clean Water Program—Stormwater C.3 Guidebook
How to use this worksheet (also see instructions on page 16 of the Stormwater C.3 Guidebook):
1. Review Column 1 and identify which of these potential sources of stormwater pollutants apply to your site. Check each box that applies.
2. Review Column 2 and incorporate all of the corresponding applicable BMPs in your Stormwater Control Plan drawings.
3. Review Columns 3 and 4 and incorporate all of the corresponding applicable permanent controls and operational BMPs in a table in your Stormwater
Control Plan. Use the format shown in Table 2-2 on page 22 of the Guidebook. Describe your specific BMPs in an accompanying narrative, and explain any
special conditions or situations that required omitting BMPs or substituting alternative BMPs for those shown here.
IF THESE SOURCES
WILL BE ON THE
PROJECT SITE …
… THEN YOUR STORMWATER CONTROL PLAN SHOULD INCLUDE THESE SOURCE CONTROL BMPs
1
Potential Sources of
Runoff Pollutants
2
Permanent Controls—Show on
Stormwater Control Plan Drawings
3
Permanent Controls—List in
Stormwater Control Plan Table and
Narrative
4
Operational BMPs—Include in
Stormwater Control Plan Table and
Narrative
A. On-site storm drain
inlets
A well-executed LID
design will not have any
storm drain inlets except
that on some hillside sites
inlets may capture runoff
to be conveyed to a
bioretention facility or
other IMP at a lower
elevation.
On previously developed
sites, in areas that are not
being rebuilt or retrofit
with LID (see the “50%
rule”), markings must be
installed on existing storm
drain inlets.
Locations of inlets.
Mark all inlets with the words “No
Dumping! Flows to Bay” or similar.
Maintain and periodically repaint or
replace inlet markings.
Provide stormwater pollution
prevention information to new site
owners, lessees, or operators.
Include the following in lease
agreements: “Tenant shall not allow
anyone to discharge anything to
storm drains or to store or deposit
materials so as to create a potential
discharge to storm drains.”
APPENDIX D — STORMWATER POLLUTANT SOURCES/SOURCE CONTROL CHECKLIST
9th Edition — APRIL 12, 2024 D-2 Contra Costa Clean Water Program—Stormwater C.3 Guidebook
IF THESE SOURCES
WILL BE ON THE
PROJECT SITE …
… THEN YOUR STORMWATER CONTROL PLAN SHOULD INCLUDE THESE SOURCE CONTROL BMPs
1
Potential Sources of
Runoff Pollutants
2
Permanent Controls—Show on
Stormwater Control Plan Drawings
3
Permanent Controls—List in
Stormwater Control Plan Table and
Narrative
4
Operational BMPs—Include in
Stormwater Control Plan Table and
Narrative
B. Interior floor drains
and elevator shaft sump
pumps
State that interior floor drains and
elevator shaft sump pumps will be
plumbed to sanitary sewer.
Inspect and maintain drains to
prevent blockages and overflow.
C. Interior parking
garages
State that parking garage floor drains
will be plumbed to the sanitary sewer.
Top floors may be drained to LID
features and then to the storm drain
system.
Inspect and maintain drains to
prevent blockages and overflow.
D1. Need for future
indoor & structural pest
control
Note building design features that
discourage entry of pests.
Provide Integrated Pest Management
information to owners, lessees, and
operators.
APPENDIX D — STORMWATER POLLUTANT SOURCES/SOURCE CONTROL CHECKLIST
9th Edition — APRIL 12, 2024 D-3 Contra Costa Clean Water Program—Stormwater C.3 Guidebook
IF THESE SOURCES
WILL BE ON THE
PROJECT SITE …
… THEN YOUR STORMWATER CONTROL PLAN SHOULD INCLUDE THESE SOURCE CONTROL BMPs
1
Potential Sources of
Runoff Pollutants
2
Permanent Controls—Show on
Stormwater Control Plan Drawings
3
Permanent Controls—List in
Stormwater Control Plan Table and
Narrative
4
Operational BMPs—Include in
Stormwater Control Plan Table and
Narrative
D2. Landscape/
Outdoor Pesticide Use
Show locations of native trees or
areas of shrubs and ground cover to
be undisturbed and retained.
Show self-retaining landscape
areas, if any.
Show stormwater treatment and
hydrograph modification
management IMPs. (See
instructions in Chapter 3, Step 5
and guidance in Chapter 5.)
State that final landscape plans will
accomplish all of the following.
Preserve existing native trees, shrubs,
and ground cover to the maximum
extent possible.
Design landscaping to minimize
irrigation and runoff, to promote
surface infiltration where appropriate,
and to minimize the use of fertilizers
and pesticides that can contribute to
stormwater pollution.
Where landscaped areas are used to
retain or detain stormwater, specify
plants that are tolerant of saturated
soil conditions.
Consider using pest-resistant plants,
especially adjacent to hardscape.
To insure successful establishment,
select plants appropriate to site soils,
slopes, climate, sun, wind, rain, land
use, air movement, ecological
consistency, and plant interactions.
Maintain landscaping using
minimum or no pesticides.
Provide IPM information to new
owners, lessees and operators.
E. Pools, spas, ponds,
decorative fountains,
and other water
features.
Show location of water feature and
a sanitary sewer cleanout in an
accessible area within 10 feet.
(Exception: Public pools must be
plumbed according to County
Department of Environmental
Health Guidelines.)
If the local municipality requires pools
to be plumbed to the sanitary sewer,
place a note on the plans and state in
the narrative that this connection will
be made according to local
requirements.
See applicable operational BMPs in
Fact Sheet SC-72, “Fountain and
Pool Maintenance,” in the CASQA
Stormwater Quality Handbooks
APPENDIX D — STORMWATER POLLUTANT SOURCES/SOURCE CONTROL CHECKLIST
9th Edition — APRIL 12, 2024 D-4 Contra Costa Clean Water Program—Stormwater C.3 Guidebook
IF THESE SOURCES
WILL BE ON THE
PROJECT SITE …
… THEN YOUR STORMWATER CONTROL PLAN SHOULD INCLUDE THESE SOURCE CONTROL BMPs
1
Potential Sources of
Runoff Pollutants
2
Permanent Controls—Show on
Stormwater Control Plan Drawings
3
Permanent Controls—List in
Stormwater Control Plan Table and
Narrative
4
Operational BMPs—Include in
Stormwater Control Plan Table and
Narrative
F. Food service
For restaurants, grocery stores, and
other food service operations, show
location (indoors or in a covered
area outdoors) of a floor sink or
other area for cleaning floor mats,
containers, and equipment.
On the drawing, show a note that
this drain will be connected to a
grease interceptor before
discharging to the sanitary sewer.
Describe the location and features of
the designated cleaning area.
Describe the items to be cleaned in
this facility and how it has been sized
to insure that the largest items can be
accommodated.
See the brochure, “Water Pollution
Prevention Tips to Protect Water
Quality and Keep Your Food Service
Facility Clean.” Provide this
brochure to new site owners, lessees,
and operators.
G. Refuse areas
Show where site refuse and
recycled materials will be handled
and stored for pickup. See local
municipal requirements for sizes
and other details of refuse areas.
If dumpsters or other receptacles
are outdoors, show how the
designated area will be covered,
graded, and paved to prevent run-
on and show locations of berms to
prevent runoff from the area.
Any drains from dumpsters,
compactors, and tallow bin areas
shall be connected to a grease
removal device before discharge to
sanitary sewer.
State how site refuse will be handled
and provide supporting detail to what
is shown on plans.
State that signs will be posted on or
near dumpsters with the words “Do
not dump hazardous materials here”
or similar.
State how the following will be
implemented:
Provide adequate number of
receptacles. Inspect receptacles
regularly; repair or replace leaky
receptacles. Keep receptacles
covered. Prohibit/prevent dumping
of liquid or hazardous wastes. Post
“no hazardous materials” signs.
Inspect and pick up litter daily and
clean up spills immediately. Keep
spill control materials available on-
site. See BMP Municipal
Complete.pdf “Waste Handling and
Disposal” in the CASQA Stormwater
Quality Handbooks
APPENDIX D — STORMWATER POLLUTANT SOURCES/SOURCE CONTROL CHECKLIST
9th Edition — APRIL 12, 2024 D-5 Contra Costa Clean Water Program—Stormwater C.3 Guidebook
IF THESE SOURCES
WILL BE ON THE
PROJECT SITE …
… THEN YOUR STORMWATER CONTROL PLAN SHOULD INCLUDE THESE SOURCE CONTROL BMPs
1
Potential Sources of
Runoff Pollutants
2
Permanent Controls—Show on
Stormwater Control Plan Drawings
3
Permanent Controls—List in
Stormwater Control Plan Table and
Narrative
4
Operational BMPs—Include in
Stormwater Control Plan Table and
Narrative
H. Industrial processes. Show process area. If industrial processes are to be
located on site, state: “All process
activities to be performed indoors. No
processes to drain to exterior or to
storm drain system.”
See Fact Sheet SC-10, “Non-
Stormwater Discharges” in the
CASQA Stormwater Quality
Handbooks
I. Outdoor storage of
equipment or materials.
(See rows J and K for
source control
measures for vehicle
cleaning, repair, and
maintenance.)
Show any outdoor storage areas,
including how materials will be
covered. Show how areas will be
graded and bermed to prevent run-
on or run-off from area.
Storage of non-hazardous liquids
shall be covered by a roof and/or
drain to the sanitary sewer system,
and be contained by berms, dikes,
liners, or vaults.
Storage of hazardous materials and
wastes must be in compliance with
the local hazardous materials
ordinance and a Hazardous
Materials Management Plan for the
site.
Include a detailed description of
materials to be stored, storage areas,
and structural features to prevent
pollutants from entering storm drains.
Where appropriate, reference
documentation of compliance with the
requirements of Contra Costa
Hazardous Materials Programs for:
Hazardous Waste Generation
Hazardous Materials Release
Response and Inventory
California Accidental Release
(CalARP)
Aboveground Storage Tank
Uniform Fire Code Article 80
Section 103(b) & (c) 1991
Underground Storage Tank
www.cchealth.org/groups/hazmat/
See the Fact Sheets SC-31, “Outdoor
Liquid Container Storage” and SC-
33, “Outdoor Storage of Raw
Materials ” in the CASQA
Stormwater Quality Handbooks
APPENDIX D — STORMWATER POLLUTANT SOURCES/SOURCE CONTROL CHECKLIST
9th Edition — APRIL 12, 2024 D-6 Contra Costa Clean Water Program—Stormwater C.3 Guidebook
IF THESE SOURCES
WILL BE ON THE
PROJECT SITE …
… THEN YOUR STORMWATER CONTROL PLAN SHOULD INCLUDE THESE SOURCE CONTROL BMPs
1
Potential Sources of
Runoff Pollutants
2
Permanent Controls—Show on
Stormwater Control Plan Drawings
3
Permanent Controls—List in
Stormwater Control Plan Table and
Narrative
4
Operational BMPs—Include in
Stormwater Control Plan Table and
Narrative
J. Vehicle and
Equipment Cleaning
Show on drawings as appropriate:
(1) Commercial/industrial facilities
having vehicle/equipment cleaning
needs shall either provide a
covered, bermed area for washing
activities or discourage
vehicle/equipment washing by
removing hose bibs and installing
signs prohibiting such uses.
(2) Multi-dwelling complexes shall
have a paved, bermed, and covered
car wash area (unless car washing
is prohibited on-site and hoses are
provided with an automatic shut-
off to discourage such use).
(3) Washing areas for cars, vehicles,
and equipment shall be paved,
designed to prevent run-on to or
runoff from the area, and plumbed
to drain to the sanitary sewer.
(4) Commercial car wash facilities
shall be designed such that no
runoff from the facility is
discharged to the storm drain
system. Wastewater from the
facility shall discharge to the
sanitary sewer, or a wastewater
reclamation system shall be
installed.
If a car wash area is not provided,
describe measures taken to discourage
on-site car washing and explain how
these will be enforced.
Describe operational measures to
implement the following (if
applicable):
Washwater from vehicle and
equipment washing operations shall
not be discharged to the storm drain
system.
Car dealerships and similar may
rinse cars with water only.
See Fact Sheet SC-21, “Vehicle and
Equipment Cleaning,” in the CASQA
Stormwater Quality Handbooks
APPENDIX D — STORMWATER POLLUTANT SOURCES/SOURCE CONTROL CHECKLIST
9th Edition — APRIL 12, 2024 D-7 Contra Costa Clean Water Program—Stormwater C.3 Guidebook
IF THESE SOURCES
WILL BE ON THE
PROJECT SITE …
… THEN YOUR STORMWATER CONTROL PLAN SHOULD INCLUDE THESE SOURCE CONTROL BMPs
1
Potential Sources of
Runoff Pollutants
2
Permanent Controls—Show on
Stormwater Control Plan Drawings
3
Permanent Controls—List in
Stormwater Control Plan Table and
Narrative
4
Operational BMPs—Include in
Stormwater Control Plan Table and
Narrative
K. Vehicle/Equipment
Repair and
Maintenance
Accommodate all vehicle
equipment repair and maintenance
indoors. Or designate an outdoor
work area and design the area to
prevent run-on and runoff of
stormwater.
Show secondary containment for
exterior work areas where motor
oil, brake fluid, gasoline, diesel
fuel, radiator fluid, acid-containing
batteries or other hazardous
materials or hazardous wastes are
used or stored. Drains shall not be
installed within the secondary
containment areas.
Add a note on the plans that states
either (1) there are no floor drains,
or (2) floor drains are connected to
wastewater pretreatment systems
prior to discharge to the sanitary
sewer and an industrial waste
discharge permit will be obtained.
State that no vehicle repair or
maintenance will be done outdoors, or
else describe the required features of
the outdoor work area.
State that there are no floor drains or if
there are floor drains, note the agency
from which an industrial waste
discharge permit will be obtained and
that the design meets that agency’s
requirements.
State that there are no tanks,
containers or sinks to be used for parts
cleaning or rinsing or, if there are, note
the agency from which an industrial
waste discharge permit will be
obtained and that the design meets
that agency’s requirements.
In the Stormwater Control Plan, note
that all of the following restrictions
apply to use the site:
No person shall dispose of, nor
permit the disposal, directly or
indirectly of vehicle fluids, hazardous
materials, or rinsewater from parts
cleaning into storm drains.
No vehicle fluid removal shall be
performed outside a building, nor on
asphalt or ground surfaces, whether
inside or outside a building, except
in such a manner as to ensure that
any spilled fluid will be in an area of
secondary containment. Leaking
vehicle fluids shall be contained or
drained from the vehicle
immediately.
No person shall leave unattended
drip parts or other open containers
containing vehicle fluid, unless such
containers are in use or in an area of
secondary containment.
APPENDIX D — STORMWATER POLLUTANT SOURCES/SOURCE CONTROL CHECKLIST
9th Edition — APRIL 12, 2024 D-8 Contra Costa Clean Water Program—Stormwater C.3 Guidebook
IF THESE SOURCES
WILL BE ON THE
PROJECT SITE …
… THEN YOUR STORMWATER CONTROL PLAN SHOULD INCLUDE THESE SOURCE CONTROL BMPs
1
Potential Sources of
Runoff Pollutants
2
Permanent Controls—Show on
Stormwater Control Plan Drawings
3
Permanent Controls—List in
Stormwater Control Plan Table and
Narrative
4
Operational BMPs—Include in
Stormwater Control Plan Table and
Narrative
L. Fuel Dispensing
Areas
Fueling areas 1 shall have
impermeable floors (i.e., Portland
cement concrete or equivalent
smooth impervious surface) that
are: a) graded at the minimum
slope necessary to prevent ponding;
and b) separated from the rest of
the site by a grade break that
prevents run-on of stormwater to
the maximum extent practicable.
Fueling areas shall be covered by a
canopy that extends a minimum of
ten feet in each direction from each
pump. [Alternative: The fueling
area must be covered and the
cover’s minimum dimensions must
be equal to or greater than the area
within the grade break or fuel
dispensing area1.] The canopy [or
cover] shall not drain onto the
fueling area.
The property owner shall dry sweep
the fueling area routinely.
1 The fueling area shall be defined as the area extending a minimum of 6.5 feet from the corner of each fuel dispenser or the length at which the hose and nozzle assembly may be operated plus a
minimum of one foot, whichever is greater.
APPENDIX D — STORMWATER POLLUTANT SOURCES/SOURCE CONTROL CHECKLIST
9th Edition — APRIL 12, 2024 D-9 Contra Costa Clean Water Program—Stormwater C.3 Guidebook
IF THESE SOURCES
WILL BE ON THE
PROJECT SITE …
… THEN YOUR STORMWATER CONTROL PLAN SHOULD INCLUDE THESE SOURCE CONTROL BMPs
1
Potential Sources of
Runoff Pollutants
2
Permanent Controls—Show on
Stormwater Control Plan Drawings
3
Permanent Controls—List in
Stormwater Control Plan Table and
Narrative
4
Operational BMPs—Include in
Stormwater Control Plan Table and
Narrative
M. Loading Docks
Show a preliminary design for the
loading dock area, including
roofing and drainage. Loading
docks shall be covered and/or
graded to minimize run-on to and
runoff from the loading area. Roof
downspouts shall be positioned to
direct stormwater away from the
loading area. Water from loading
dock areas shall be drained to the
sanitary sewer, or diverted and
collected for ultimate discharge to
the sanitary sewer.
Loading dock areas draining
directly to the sanitary sewer shall
be equipped with a spill control
valve or equivalent device, which
shall be kept closed during periods
of operation.
Provide a roof overhang over the
loading area or install door skirts
(cowling) at each bay that enclose
the end of the trailer.
Move loaded and unloaded items
indoors as soon as possible.
See Fact Sheet SC-30, “Outdoor
Loading and Unloading,” in the
CASQA Stormwater Quality
Handbooks
N. Fire Sprinkler Test
Water
Provide a means to drain fire sprinkler
test water to the sanitary sewer.
See the note in Fact Sheet SC-41,
“Building and Grounds
Maintenance,” in the CASQA
Stormwater Quality Handbooks
APPENDIX D — STORMWATER POLLUTANT SOURCES/SOURCE CONTROL CHECKLIST
9th Edition — APRIL 12, 2024 D-10 Contra Costa Clean Water Program—Stormwater C.3 Guidebook
IF THESE SOURCES
WILL BE ON THE
PROJECT SITE …
… THEN YOUR STORMWATER CONTROL PLAN SHOULD INCLUDE THESE SOURCE CONTROL BMPs
1
Potential Sources of
Runoff Pollutants
2
Permanent Controls—Show on
Stormwater Control Plan Drawings
3
Permanent Controls—List in
Stormwater Control Plan Table and
Narrative
4
Operational BMPs—Include in
Stormwater Control Plan Table and
Narrative
O. Miscellaneous Drain
or Wash Water or Other
Sources
Boiler drain lines
Condensate drain lines
Rooftop equipment
Drainage sumps
Roofing, gutters, and
trim.
Other sources
Boiler drain lines shall be directly or
indirectly connected to the sanitary
sewer system and may not discharge
to the storm drain system.
Condensate drain lines may discharge
to landscaped areas if the flow is small
enough that runoff will not occur.
Condensate drain lines may not
discharge to the storm drain system.
Rooftop equipment with potential to
produce pollutants shall be roofed
and/or have secondary containment.
Any drainage sumps on-site shall
feature a sediment sump to reduce the
quantity of sediment in pumped water.
Avoid roofing, gutters, and trim made
of copper or other unprotected metals
that may leach into runoff.
Include controls for other sources as
specified by local reviewer.
P. Plazas, sidewalks,
and parking lots.
Sweep plazas, sidewalks, and
parking lots regularly to prevent
accumulation of litter and debris.
Collect debris from pressure washing
to prevent entry into the storm drain
system. Collect washwater
containing any cleaning agent or
degreaser and discharge to the
sanitary sewer not to a storm drain.
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Regulatory and Technical Background
Appendix E
9th Edition — APRIL 12, 2024 E-1
Regulatory and
Technical Background
Some background, including updates, on selected policies and criteria in the
Guidebook 9th Edition
AND development is a complex undertaking, and no two projects are the
same. Municipal staff can and should exercise latitude and discretion, within
the boundaries of permit compliance, when interpreting the C.3
requirements as they apply to a specific project. This appendix provides
information and explanations of technical and regulatory issues which may help with
decision-making.
Introduction: Stormwater NPDES Permit History
In 1993, the Regional Water Board first issued a municipal stormwater NPDES
permit to Contra Costa County, the 19 cities and towns within the County, and the
Contra Costa Flood Control and Water Conservation District. The permit
mandated a comprehensive program to prevent stormwater pollution. The
comprehensive program includes measures to prevent pollution from municipal
facilities and operations, identification and elimination of illicit discharges to storm
drains, business inspections, public
outreach, construction site
inspections, monitoring and studies
of stream health, and control of
runoff pollutants from new
developments and redevelopments.
In 2003, the Regional Water Board
added Provision C.3, tightening
requirements for new develop-
ments and redevelopments. The
permittees began implementing the
provision in 2005. The Regional
Appendix E
L
Appendix E Contents
Stormwater NPDES Permit History ..........................E-1
Regulatory Context and Roles .....................................E-2
Imperviousness ............................................................E-3
Low Impact Development ............................................E-3
CCCWP, LID, and Provision C.3 ................E-4
LID in the MRP ..........................................E-6
Bioretention Soil Mix and Verification ......................E-8
Limits on the Use of Infiltration Devices ................... E-10
Stormwater Facility Sizing Criteria .......................... E-11
Flow Control (Hydromodification Management) ........ E-15
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Water Board added hydrograph modification management (flow control)
requirements in 2006.
In October 2009, the Regional Water Board included Contra Costa municipalities
in its first Municipal Regional Permit (MRP). The MRP applies to all municipalities
in Alameda, Contra Costa, San Mateo, and Santa Clara counties, and some
municipalities in Solano County, and supersedes the earlier countywide stormwater
NPDES permits. The MRP mandates a Low Impact Development (LID) approach
similar to that developed by the CCCWP from 2003 through 2009. The Regional
Water Board amended the MRP on November 28, 2011, detailing some exceptions
for when LID treatment is required. The LID requirements went into effect
December 1, 2011.
The MRP was reissued on November 19, 2015 (MRP 2.0) and again on May 11,
2022 (MRP 3.0).
Regulatory Context and Roles
MRP Provision C.3 requires municipalities to condition development approvals
with incorporation of specified stormwater controls. The municipalities’ annual
report to the Regional Water Board includes a list of development projects approved
during the year and the specific stormwater controls that were required for each
project. In the annual report, the municipalities also document their program to
verify stormwater treatment and flow-control facilities are being adequately
maintained. The municipalities—not the Regional Board or its staff—are
charged with ensuring development projects comply with the C.3
requirements. (Regional Water Board staff sometimes reviews stormwater controls
in connection with applications for Clean Water Act Section 401 water-quality
certification, which is required for projects that involve work in streams, including
dredging and filling.)
Municipal staff review the project proponent’s Stormwater Control Plan for
compliance with the requirements of Provision C.3. At the same time, they consider
how the design of LID features and facilities integrates with the site design,
landscape design, and building architecture to support municipal objectives such as
design quality, consistency with neighborhood character and values, and
contribution to natural qualities achievable within the urban context.
As discussed in Chapter 5, municipalities are responsible for inspecting and verifying
the proper operation and maintenance of stormwater treatment facilities, and some
pervious pavement installations, in perpetuity. Project proponents and
municipalities share the aim of designing and building facilities that are low-
maintenance and long-lasting.
Municipal reviewers have latitude and discretion to reject proposed C.3 compliance
designs that, while meeting the specific requirements and numeric criteria in this
Guidebook and the NPDES permit, don’t reflect best practices or local values for
urban design and architectural design, or are not sustainable.
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Imperviousness
Schueler (1995) proposed imperviousness as a “unifying theme” for the efforts of
planners, engineers, landscape architects, scientists, and local officials concerned
with urban watershed protection. Schueler argued (1) that imperviousness is a useful
indicator linking urban land development to the degradation of aquatic ecosystems,
and (2) imperviousness can be quantified, managed, and controlled during land
development.
Imperviousness has long been understood as the key variable in urban hydrology.
Peak runoff flow and total runoff volume from small urban catchments is usually
calculated as a function of the ratio of impervious area to total area (rational
method). The ratio correlates to the composite runoff factor, usually designated
“C”. Increased flows resulting from urban development tend to increase the
frequency of small-scale flooding downstream.
Imperviousness links urban land development to degradation of aquatic ecosystems
in two ways.
First, the combination of paved surfaces and piped runoff efficiently collects urban
pollutants and transports them, in suspended or dissolved form, to surface waters.
These pollutants may originate as airborne dust, be washed from the atmosphere
during rains, or may be generated by automobiles and outdoor work activities.
Second, increased peak flows and runoff durations can cause erosion of stream
banks and beds, transport of fine sediments, and disruption of aquatic habitat.
Measures taken to control stream erosion, such as hardening banks with riprap or
concrete, may permanently eliminate habitat. By reducing infiltration to
groundwater, imperviousness may also reduce dry-weather stream flows.
Imperviousness has two major components: rooftops and transportation (including
streets, highways, and parking areas). The transportation component is usually larger
and is more likely to be directly connected to the storm drain system.
The effects of imperviousness can be mitigated by disconnecting impervious areas
from the drainage system and by making drainage less efficient—that is, by
encouraging detention and retention of runoff near the point where it is generated.
Detention and retention reduce peak flows and volumes and allow pollutants to
settle out or adhere to soils before they can be transported downstream.
Low Impact Development (LID)
MRP Provision C.3.c mandates the use of LID for stormwater treatment, with
narrow exceptions. Techniques for implementing LID are detailed in Chapter 3 of
this Guidebook.
LID aims to mimic a site’s pre-development hydrology by minimizing
imperviousness and then by detaining, infiltrating, and filtering runoff in landscape-
based features—principally bioretention facilities.
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To mitigate the effects of imperviousness on a watershed scale, LID must be
implemented widely and consistently throughout the watershed. Effective LID
design requires that facilities be integrated into the urban landscape so that they are
seen and valued by people living and working there. This helps ensure the LID
facilities are preserved and maintained over the life of the development. The design
procedures and requirements in Chapter 3, Low Impact Development Site Design
Guide, sets out a design procedure and requirements intended to ensure LID
features and facilities are integrated into the project site design and landscape design.
Further, LID facilities must be designed and constructed to be robust, resilient, and
low-maintenance. Chapter 4, Design and Construction of Bioretention Facilities and
Other Integrated Management Practices, sets forth design criteria intended to
achieve quality and consistency in facilities constructed throughout Contra Costa.
Under MRP Provision C.3.h., Permittees bear responsibility for periodic inspection
and verification of LID facilities on public and private properties. In Chapter 5,
Table 5-2 lists key required features and design criteria and the corresponding
benefit to long-term facility operation.
ʇ CCCWP, LID, AND PROVISION C.3 COMPLIANCE
In 1999, a manual, “Low Impact Development Design Strategies: An Integrated
Design Approach,” was published by the Prince George’s County, Maryland
Department of Environmental Resources. The manual describes the key goals,
strategies, and practices of LID as understood today.
Also in the 1990s, CCCWP staff participated in meetings of the Bay Area
Stormwater Management Agencies Association’s Development Committee. With
participation by RWQCB staff, the Committee reached consensus to promote
landscape-based methods of reducing runoff and treating runoff on new
development sites. The Committee provided input to an RWQCB “Staff
Recommendations for New and Redevelopment Controls for Stormwater
Programs” (April 1994). The Committee then solicited proposals for, and directed
the preparation of, a design manual, “Start at the Source” (1997). An updated and
expanded version of “Start at the Source” was published in 1999. “Start at the
Source” does not use the terms “Low Impact Development” or “LID,” but includes
the same concepts.
Throughout the 1990s, decisions regarding whether to require implementation of
runoff reduction and stormwater treatment on a new development site, and how
much, were at the discretion of individual municipal governments—decisions
typically following the recommendation of municipal planning staff. This level of
implementation was described at the time as “Do what you can, where you can.”
In 2000, Water Board staff drafted amendments to the countywide stormwater
permits for municipalities in Santa Clara County. The Water Board adopted the
amendments in the Santa Clara, Alameda, San Mateo, and Contra Costa Counties
during 2001-2003. The new “Provision C.3” requirements were based, in large part,
on requirements adopted earlier by the Regional Water Quality Control Board for
the Los Angeles Region. At the heart of those requirements were numerical criteria
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specifying the amount of runoff that must be treated prior to discharge—in effect,
specifications for the size or capacity of treatment facilities. See “Stormwater Facility
Sizing Criteria,” below.
In 2000 the State Water Resources Control Board, in a response to petition from
the City of Bellflower and other parties, found that the Los Angeles RWQCB based
its decision on a “maximum extent practicable” standard. The SWRCB Order WQ
2000-11 provided a basis for similar numeric standards in subsequent permits issued
by the RWQCBs, including the Bay Area MRP in past and current iterations. See
“Stormwater Treatment Facility Sizing Criteria” below.
In 2003, BASMAA published a companion document to “Start at the Source,” titled
“Using Site Design Techniques to Meet Development Standards for Stormwater
Quality.” The document shows how “self-treating areas” and “runoff reduction
areas” (self-retaining areas) can be used to reduce the tributary drainage, and
therefore the minimum required size, of stormwater treatment facilities for a
development site. This document was among the first efforts to codify how to use
LID techniques to meet permit standards for stormwater treatment.
The first edition (2005) of CCCWP’s Stormwater C.3 Guidebook built on an earlier
work by the City of Milpitas (2003) that applied the permit numeric sizing criteria
to the design of bioretention facilities and other LID facilities.
With these two elements in place—(1) codified methods for implementing runoff
reduction and (2) criteria for sizing LID treatment facilities—it was possible to
develop and promulgate a design methodology that uses LID to comply with the
RWQCB’s permit requirements.
The methodology was incorporated into the Stormwater C.3 Guidebook and has been
refined in subsequent editions. With the 3rd Edition (2006), CCCWP developed and
released an IMP Sizing Calculator. The calculator facilitates the arithmetic required
to size treatment facilities—that is, summing tributary areas and multiplying times
sizing factors. More significantly, the calculator tracks tributary areas (Drainage
Management Areas, or DMAs) and treatment facilities (Integrated Management
Practices, or IMPs). This facilitates creating, documenting, and evaluating a land
development project design that uses a full suite of LID features and facilities (self-
treating areas, self-retaining areas, and a menu of IMPs) to achieve compliance. The
Guidebook’s step-by-step procedure, combined with the calculator, facilitates a design
that distributes, manages, and treats runoff throughout the site rather than one
facility or a few facilities.
During 2004-2005, Contra Costa municipalities updated their stormwater
ordinances to reference the “Provision C.3” requirements and to require that
applications for development project approvals include “a stormwater control plan
that meets the criteria in the most recent version of the Contra Costa Clean Water
Program Stormwater C.3 Guidebook.” This launched LID as the standard acceptable
means of compliance with the C.3 requirements throughout the County, although
there was continued, but declining, use of non-LID site designs and facilities over
the following few years.
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ʇ LID IN THE MRP
The Municipal Regional Stormwater Permit (MRP) consolidated and superseded the
earlier countywide permits. Adopted October 14, 2009, MRP 1.0 included Provision
C.3.c., which required treatment of the amount of runoff specified in the numeric
criteria using “LID treatment measures.” These measures were defined as
“harvesting and re-use, infiltration, evapotranspiration, and biotreatment.”
Among these four treatment measures, Provision C.3.c. in MRP 1.0 allowed the use
of bioretention only if the first three measures were infeasible on the project site.
The effective date of Provision C.3.c. was set to be December 1, 2011. In the
interim, the Permittees were directed to prepare the following reports:
Feasibility/Infeasibility Criteria Report (due May 1, 2011), with
“discussion of proposed feasibility and infeasibility criteria and
procedures the Permittees shall employ to make a determination of when
biotreatment will be allowed…
Status Report on Application of Feasibility/Infeasibility Criteria (due
December 1, 2013)
Model Biotreatment Soil Media Specifications (due December 1, 2010—
see “Bioretention Soils,” below)
Green Roof Minimum Specifications (due May 1, 2011)
These reports were prepared under the auspices of BASMAA. CCCWP participated
actively in preparation of the reports.
The RWQCB amended MRP 1.0 on November 28, 2011, requiring full
implementation of the LID requirements on private development projects
immediately on December 1, 2011 (December 1, 2012 for public projects).
By this time, Contra Costa municipalities had been requiring LID for compliance
with the Provision C.3.d. treatment requirements for nearly seven years. CCCWP
participated actively in the preparation of the required reports, and because CCCWP
negotiated permit terms that aligned with the Stormwater C.3 Guidebook, the mandated
transition to LID required only minor changes to the Guidebook and to the
development review practices of Contra Costa municipalities. However, it was
necessary to incorporate instructions for analyzing the feasibility of harvesting and
reuse—and the feasibility of infiltration—in the 6th Edition, which was published
February 15, 2012.
The Status Report on Application of Feasibility/Infeasibility Criteria (December 1,
2013) found:
Infiltration of some runoff is feasible on most projects, but in the clay
soils typical in the Bay Area, the amount of runoff that can be infiltrated
is highly variable. On most sites, it is not practical or feasible to design
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facilities that can reliably and dependably infiltrate the amount of runoff
specified in Provision C.3.d. Bioretention facilities can infiltrate between
40% and 80% of total runoff depending on rainfall patterns and facility
size.
Very few development projects create the quantity and timing of non-
potable water demand required to feasibly harvest and use the amount
of runoff specified in Provision C.3.d.
Bioretention is, on balance, equal in water-quality effectiveness to
harvesting/use or infiltration.
A BASMAA “White Paper” on Provision C.3 in MRP 2.0 (February 2015)
proposed a “Bay Area Approach” to implementing new development
requirements based on by-then-substantial experience with implementing LID.
The “White Paper” recommended omitting the feasibility test and allowing
bioretention as an equivalent “first tier” option for LID treatment.
To support the recommendation, BASMAA’s consultants conducted modeling of
bioretention performance. The modeling, presented in the Status Report on
Application of Feasibility/Infeasibility Criteria, used a bioretention facility with the
underdrain discharge elevation set at the top of the gravel underdrain layer. It is
assumed that underlying soils are not compacted.
Setting the underdrain discharge elevation at the top of a bioretention facility’s
gravel layer, and specifying that underlying soils be uncompacted, maximizes the
amount of runoff that is captured and made to infiltrate into native soils rather than
being discharged through the underdrain. This, in turn, minimizes the amount of
pollutants discharged from the facility, particularly for soluble pollutants.
MRP 2.0 implemented the “White Paper” recommendation but did not include any
design requirement regarding the underdrain discharge elevation. Nevertheless,
CCCWP Permittees have required that bioretention facilities include the “raised
underdrain” design and that underlying soils be uncompacted and be loosened or
ripped prior to installation of the gravel layer. See Chapter 4.
Where bioretention facilities are to be built close to foundations or pavement, or on
steep slopes, the design of curbs, walls, footings, and other elements may need to
incorporate consideration of additional soil moisture introduced by the facilities. In
many cases, an impermeable cutoff wall is constructed between the bioretention
facility and an adjacent foundation or pavement section, as recommended by the
project geotechnical engineer.
Flow-through planters may be used as an alternative to bioretention only on upper-
story plazas, where infiltration could cause mobilization of pollutants in soil or
groundwater, and other situations where infiltration is a concern, such as locations
with potential geotechnical hazards that cannot be mitigated except by preventing
infiltration.
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Bioretention Soil Mix Specification and Verification
ʇ BACKGROUND
The original C.3 requirements (for Contra Costa municipalities, these were in a 2003
permit amendment) did not require LID be used for treatment and had no specific
criteria for bioretention facilities. CCCWP took the lead, regionally, to refine
guidance and criteria for LID features and facilities that would treat the stormwater
flows identified in the new Provision C.3.d.
CCCWP’s initial design guidance for bioretention facility soils (Guidebook 2nd Ed.,
2005) called for a “sandy loam with a minimum infiltration rate of 5 in./hr.” In at
least one significant instance, native “sandy loam” material passed initial review, was
installed in a constructed facility, and then exhibited a sudden loss of infiltration
capacity after three to four rain events. In the Guidebook 3rd Ed. (Oct. 2006), the
specification was revised to “… ‘sandy loam’ soil mix with no more than 5% clay
content. Mix should be 50-60% sand, 20-30% compost, and 20-30% topsoil…”
This was the beginning of a move away from a performance specification and
toward a design specification for bioretention soils. However, as late as 2007,
CCCWP trainings included the use of a falling-head “bucket test” to measure the
infiltration rate of bioretention soil delivered to the site. Staff from Contra Costa
County, San Pablo, and Walnut Creek later developed a more portable version of
the “bucket test” that uses a plexiglass tube.
Experience revealed the “bucket test” has poor repeatability. This could be due, in
part, to variation among samples, test equipment, and test procedures. Many users
found that initial test runs on a sample show an adequate infiltration rate (sometimes
much faster than 5 inches per hour) which diminishes unpredictably on repeated
wettings. In addition, there is no data available with which to evaluate the
hypothesized correlation between the “bucket test” measurement and performance
of the installed soil material.
In early 2008, CCCWP issued an RFP seeking a technical consultant to prepare
specifications for “an appropriate soil mix to ensure a long-term minimum
infiltration rate of 5 inches per hour while supporting plants and recommended
procedures for verification at the construction site and/or in a laboratory.” WRA,
Inc., was selected and their consultant Megan Stromberg worked with CCCWP’s
Development Committee to develop detailed specifications for two soil mix options
(Mix “A” and Mix “B”). The two mixes were included in an update to the
Guidebook 4th Ed. in January 2009. The specifications required submittal of grain
size analyses for the sand component and quality analyses for the compost
component, but purposefully omitted any requirement for infiltration testing of the
final mix. In addition, the specifications explicitly allowed municipal inspectors to
accept test results and certification for a “brand name” mix from a soil supplier.
The first version of the San Francisco Bay Area Municipal Regional Stormwater
Permit (MRP 1.0), which took effect December 1, 2009, required the Permittees to
propose, within a year, soil media specifications for bioretention soil media.
Through the Bay Area Stormwater Management Agencies Association (BASMAA),
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the Permittees retained WRA, Inc., and Megan Stromberg assisted a regional
process to develop consensus on the proposed specifications. The process included
an April 2010 roundtable of soil scientists, soils engineers, consultants, municipal
staff, building industry representatives, and Water Board staff. Based on the
outcomes of the process, BASMAA recommended the Contra Costa specifications
be used as a starting point for the required proposal. With minor changes from the
Contra Costa specifications, as recommended by WRA, the proposed regional
specifications were submitted to the Water Board. The specifications were
incorporated into a permit amendment effective December 1, 2011. With a few
minor updates, these are the same specifications that are in effect now.
ʇ SUBMITTAL AND VERIFICATION REQUIREMENTS
In addition to ensuring that bioretention facility operation is in compliance with
permit requirements, inspection of the delivered bioretention soil protects the
facility owner and future owners. Infiltration rates vary logarithmically, and when
an installed soil fails to infiltrate runoff, it tends to fail noticeably. In a properly
operating facility, any runoff ponded on the surface should infiltrate within an hour
or two following of the end of rainfall. In a facility that is failing, ponding on the
surface of the facility may be apparent several hours or even days after a rain event.
Corrective maintenance would typically require the current owner to remove and
replace the plantings and soil media.
The specifications call out the information that applicants must submit to show the
soil in their under-construction bioretention facilities meets the minimum
performance requirements. The submittal requirements omit any infiltration test if
the recommended mix is used. If an alternative mix is used, as allowed, the submittal
must include: “Certification from an accredited geotechnical testing laboratory that
the Bioretention soil has an infiltration rate between 5 and 12 inches per hour…”
when compacted to 85-90% of maximum dry density. This is substantially different
from the “bucket test.” There is no readily available means to correlate the one test
to the other, or to performance of a facility after installation. Further, the need to
convey a sample to an accredited geotechnical testing laboratory and await results
means that it is not practical to test the material following its delivery to the
construction site. Therefore, the test results may or may not be applicable to the
material that is delivered and installed.
In summary, CCCWP’s early decision to rely on a design specification (that is, the
physical properties of the mix components) rather than on infiltration-rate testing
was based on the experience of Permittee staff overseeing the construction and
operation of bioretention facilities. With BASMAA, CCCWP negotiated the current
permit requirements, which do not include infiltration-rate testing if the
recommended mix is used. If an alternative mix is used, infiltration testing is
required, but must be done in a laboratory.
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Based on this experience, this 8th Edition of the Guidebook strongly encourages
use of the recommended mix and includes submittal procedures for verifying the
mix prior to installation.
A sample must be submitted along with a multi-page form completed by the
suppliers of the compost, the sand, and the completed mix, and by laboratories
testing and certifying the sand and compost components. At the job site, at the time
of delivery, the inspector should compare the sample to the delivered material. If
there is indication that it might not be the same material, it should be rejected.
As discussed among municipal staff during CCCWP’s annual trainings, the most
effective way for inspectors to ensure the quality of the delivered material, after
reviewing the laboratory test results for the sand and compost components, is to
inspect it by look and feel.
A mix meeting the design specification will have a grainy, gritty texture and will not
clump when dry. If formed in the hand when damp, the material may be slightly
spongy but should break apart easily. Smearing or discoloration on the hand likely
indicates the presence of excessive clay. Each delivery should be inspected, and each
batch inspected visually for homogeneity.
Note that a slower infiltration rate is not always necessary for plant health. In some
cases this misconception has led to problems in executing the mix design. What’s
needed for plant health is moisture retention, and the specified amount of compost
is intended to provide that regardless of a high infiltration rate. Excessive water use
can be avoided by selecting an appropriate plant palette and by using drip irrigation
with smart controllers (if water is available at the location).
Limits on the Use of Infiltration Devices
MRP Provision C.3.d.iv. restricts the design and location of “infiltration devices”
that, as designed, may bypass filtration through surface soils before reaching
groundwater.
Infiltration devices include:
Dry wells
Infiltration basins
Infiltration trenches
Infiltration devices do not include:
Bioretention facilities
Self-retaining or self-treating areas
Pervious pavements
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Infiltration devices may not be used in areas of industrial or light industrial activity;
areas subject to high vehicular traffic (25,000 or greater average daily traffic on main
roadway or 15,000 or more average daily traffic on any intersecting roadway);
automotive repair shops; car washes; fleet storage areas (bus, truck, etc.); nurseries,
or other areas with pollutant sources that could pose a high threat to water quality,
as determined by municipal staff.
The vertical distance from the base of any infiltration device to the seasonal high
groundwater mark shall be at least 10 feet. Infiltration devices shall be located a
minimum of 100 feet horizontally from any known water supply wells.
In addition, infiltration devices are not recommended where:
The infiltration device would receive drainage from areas where
chemicals are used or stored, where vehicles or equipment are washed,
or where refuse or wastes are handled.
Surface soils or groundwater are polluted.
The facility could receive sediment-laden runoff from disturbed areas or
unstable slopes.
Increased soil moisture could affect the stability of slopes of foundations.
Soils are insufficiently permeable to allow the device to drain within
72 hours.
Stormwater Treatment Facility Sizing Criteria
Criteria for sizing stormwater treatment facilities are in MRP Provision C.3.d.
ʇ TECHNICAL BACKGROUND
For flow-based facilities, the NPDES permit specifies the rational method be used
to determine flow. The rational method uses the equation
Q = CiA, where
Q = flow
C = weighted runoff factor between 0 and 1
i = rainfall intensity
A = area
The permit identifies three alternatives for calculating rainfall intensity:
1. the intensity-duration-frequency method, with a hydrograph
corresponding to a 50-year storm,
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2. the 85th percentile rainfall intensity times two, and
3. 0.2 inches per hour.
An analysis conducted for the CCCWP determined all three methods yielded similar
results.
The 0.2 inches per hour criterion is the basis for a consistent countywide sizing
factor for bioretention facilities when used for stormwater treatment only (i.e., not
for flow control). The factor is based on a design maximum surface loading rate of
5 inches per hour (mandated by MRP Provision C.3.c.i.(2)(c)(ii).The sizing factor is
the ratio of the design intensity of rainfall on tributary impervious surfaces
(0.2 inches/hour) to the design surface loading rate in the facility (5 inches/hour),
or 0.04 (dimensionless).
The City of Milpitas (2003) was the first Bay Area municipality to publish guidance
incorporating the 4% sizing factor for bioretention facilities, followed by the first
edition (2005) of this Guidebook. Other countywide programs’ guidance soon
followed. By the time the MRP was adopted in 2009, the 4% sizing criterion for
bioretention was in common use by most municipalities.
For volume-based treatment facilities, MRP Provision C.3.d. references two
methods, the WEF method and the CASQA BMP Handbook method. Both the WEF
and California BMP methods are based on continuous simulation of runoff from a
hypothetical one-acre area entering a basin designed to draw down in 48 hours. The
CASQA BMP Handbook method is based on continuous simulation of runoff from
a hypothetical unit tributary area entering a basin designed to draw down in 24 or
48 hours. The WEF method is a simplified procedure involving a regression
equation for a runoff coefficient developed using rainfall/runoff relationships for
60 urban U.S. watersheds, and regression constants for determining the design
runoff volume, for a 12-, 24-, or 48-hour drawdown time, based on analysis of long
term rainfall records from seven U.S. cities, including San Francisco.1
Local rainfall data and the CASQA BMP Handbook method were formerly used
for sizing detention basins in Contra Costa County. The simulation was iterated to
find the unit basin size that detains about 80% of the total runoff during the
simulation period. The unit basin storage size is expressed as a depth which varies
from about 0.45 to 0.85 inches in Contra Costa County. The results of the method
are presented in a nomograph. The technical background is available in a 2005
technical memo.
Since the LID requirements in the MRP 2011 amendments took effect, detention
basins may not be used to meet stormwater treatment requirements for
Regulated Projects. The WEF method and CASQA BMP Handbook method were
included in the 2011 amendments and in the subsequent MRP 2.0, but are obsolete
1 WEF Manual of Practice No. 23/ASCE Manual and Report on Engineering Practice No. 87, “Urban Runoff
Quality Management”, 1998
A P P E N D I X E — R E G U L A T O R Y A N D T E C H N I C A L B A C K G R O U N D
9th Edition — APRIL 12, 2024 E-13
as design standards, but are sometimes used to calculate the volume associated with
capture of 80% of annual runoff.
In the 2009 MRP, a third option for sizing stormwater treatment facilities was added
to Provision C.3.d. This option states that “treatment systems that use a
combination of flow and volume capacity shall be sized to treat at least 80 percent
of the total runoff over the life of the project, using local rainfall data.”
This option can also be used to develop sizing factors for facilities with a standard
cross-section (i.e., where the volume available to detain runoff is proportional to
facility surface area). To calculate sizing factors, inflows, storage, infiltration to
groundwater, underdrain discharge, and overflows are tracked for each time-step
during a long-term simulation. The simulation is repeated, with variations in the
treatment surface area, to determine the minimum area required for the facility to
capture and treat 80% of the inflow during the simulation. Such an analysis was
conducted for BASMAA by Dubin Environmental Consulting and is described in a
Technical Report (Dubin, 2017).
ʇ APPLICABILITY OF REDUCED BIORETENTION SIZING
The criteria in Chapter 3 requires that a minimum 4% sizing factor be used unless
justification is provided and documented. Reduced sizing can only be used for
road reconstruction projects that follow requirements outlined in MRP 3.0
Provision C.3.b.ii (5)(c), or that are non-regulated projects under C.3.b. For further
detail on applicability of reduced bioretention sizing, visit
https://www.cccleanwater.org/development-infrastructure/green-
infrastructure/resources. In addition, all facilities must be at least as large as the
minimum sized determined from the equation in the Technical Report (Dubin,
2017). The rationale for this policy follows.
Generally, in projects with surface parking and/or substantial landscaping,
bioretention facilities designed to the 4% sizing factor can be incorporated into the
project at reasonable cost and in a way that complements other elements of the site
and landscape design. Hundreds of development projects have been built to this
LID standard in Contra Costa municipalities since 2005.
Use of the 4% sizing factor is practicable on most sites. Requiring that facilities be
built to this minimum addresses the following uncertainties inherent in LID design
and construction.
Uncertainties in Hydrologic Analysis. Variation in actual runoff from predicted
runoff could result from any or all of the following factors:
Geographic variability might not be fully captured by the rainfall analysis.
Rainfall is simulated in hourly increments, but drainage management
areas typically have a time of concentration less than one hour.
Rain gauge records may not fully represent the range and timing of all
runoff events, especially rare large events.
S T O R M W A T E R C . 3 C O M P L I A N C E
E-14 9th Edition — APRIL 12, 2024
Climate change is causing increased frequency of intense storms.
The model is based on a 1-acre impervious tributary area. Actual tributary
areas are more complex, with various slopes and surfaces, and sometimes
complicated routing of runoff.
Uncertainties in Facility Design and Construction. The Permittees’ experience is
that this ideal configuration—the configuration simulated by the modeling in the
Technical Report--is not always attained in built facilities. Despite best efforts to
ensure project quality, the Permittees have somewhat limited authority, and limited
resources, to enforce design and construction standards on private projects. Even
on public projects, where the Permittee is both implementer and overseer, it is often
necessary to make compromises in design and construction, because of unforeseen
field conditions, or to accommodate other project purposes. Typical deviations
from the ideal configuration include the following:
Side slopes were counted when representing the facility area, but some
or all of the side slope area is not actually inundated prior to overflow
(i.e., is actually higher in elevation than the facility overflow).
The facility is not built flat, reducing the amount of effective surface
storage or subsurface storage.
The overflow grate is placed too low, reducing the amount of surface
storage.
The surface reservoir is made shallow by an excess of sand/compost mix.
The excavation for the gravel layer does not extend beneath the entire
treatment area of the facility.
The underdrain discharge elevation is lower than the top of the gravel
layer.
Subsurface utilities or footings intrude into the gravel layer.
Soil media is not to specification, or clayey sediment drains into the
facility, causing the percolation rate to be less than 5 inches per hour.
Projects where reduced sizing may be justified. Based on Contra Costa
municipalities’ experience reviewing applications for development project
approvals, in projects where structures cover all or nearly all the site square footage,
designers are more likely to encounter some or all of the following constraints:
Tributary drainage areas (Drainage Management Areas, or DMAs) are
smaller and the routing of runoff from the DMAs to the facilities
becomes more complex.
A P P E N D I X E — R E G U L A T O R Y A N D T E C H N I C A L B A C K G R O U N D
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There is a greater variation in the ratio between DMA area and the
available area for a bioretention facility. It is more difficult to adjust
DMA boundaries to distribute runoff among facilities.
There is insufficient room for side slopes between the facilities and
surrounding grade. Perimeter curbs and walls may be required, and
protective fences may sometimes be installed atop the walls. High walls
around facilities can yield a well-like appearance and the soil surface may
be shaded. The walls may need to be buttressed or engineered to avoid
tipping, sliding, or other modes of failure.
Facilities may be located adjacent to buildings or roadways, requiring the
addition of moisture barriers or beefed-up foundations.
Potential facility locations conflict with above-ground or below-ground
utilities.
Facilities are more visible to site users and maintaining a pleasing
appearance is of greater concern.
To facilitate maximum effectiveness of LID stormwater treatment in situations with
these constraints, the criteria in Chapter 3 include a project-wide requirement that
the project include no surface parking or only incidental surface parking. The criteria
also require a demonstration—for each facility proposed to be smaller than the 4%
criterion—that facility size has been maximized given the specific constraints.
Flow-Control (Hydromodification Management)
MRP Provision C.3.g. specifies:
Stormwater discharges from HM projects shall not cause an increase in
the erosion potential of the receiving stream over the pre-project
(existing) condition. Increases in runoff flow and volume shall be
managed so that post-project runoff shall not exceed pre-project rates
and durations, where such increased flow and/or volume is likely to cause
increased potential for erosion of creek beds and banks, silt pollutant
generation, or other adverse impacts on beneficial uses due to increased
erosive force.
Comparison of post-project to pre-project flows is based on continuous simulation
of runoff over a period of 30 years or more, using local hourly rainfall data, and
statistical analysis of the cumulative duration of flows.
As required by the 2003 amendment adding “Provision C.3” requirements to the
countywide NPDES permit, the CCCWP submitted a Hydrograph Modification
Management Plan (HMP) in July 2005. CCCWP’s HMP included design criteria for
Low Impact Development Integrated Management Practices (IMPs). Applicants
S T O R M W A T E R C . 3 C O M P L I A N C E
E-16 9th Edition — APRIL 12, 2024
for development approvals can comply with both treatment and HM requirements
by incorporating IMPs into the project drainage design. The RWQCB approved 2
Contra Costa’s proposed HM standard in July 2006. The HM standard was
incorporated into the Guidebook Third Edition, which was published in October
2006. The IMPs and IMP design criteria were updated in the Fourth Edition,
published in September 2008. A supplement to the Fourth Edition, adding two new
IMP configurations (Cistern + Bioretention, Bioretention + Vault) was published
in October 2009.
Fulfilling a requirement in the RWQCB’s 2006 Order, CCCWP implemented an
IMP Model Calibration and Validation Plan during 2011-2013. The objective of that
plan was to evaluate the follow-control effectiveness of the IMPs. IMPs at sites in
Walnut Creek and in Pittsburg were monitored during the 2011 and 2012 water
years. The results were submitted to the Water Board in a September 2013 IMP
Monitoring Report. Results showed that the IMPs provide considerably greater
flow-control effectiveness than predicted by the continuous simulation modeling
presented in the 2005 HMP. The primary reason is that the 2005 model inputs
underestimated the amount of runoff that would be infiltrated by the IMPs.
Bioretention facilities built to Guidebook criteria controlled runoff flows between
one-tenth of the 2-year pre-project peak flow (0.1Q2) and the 10-year pre-project
peak flow (Q10). These are the thresholds specified in MRP 1.0, 2.0, and 3.0.
Fulfilling a requirement in MRP 2.0, CCCWP worked closely with RWQCB staff to
prepare a Hydromodification Technical Report, completed in September 2017. The
report describes field work conducted on Contra Costa streams during 2017, which
supplemented field work conducted in 2004-2005. The report also documents
implementation of Direct Simulation of Erosion Potential a modeling methodology
used in other parts of California that more precisely predicts the risk of accelerated
stream erosion. The September 2017 report concluded that risk could be controlled
using LID design criteria—including IMP sizing factors—similar to those in effect
since 2008.
CCCWP received Water Board staff comments on the 2017 report in 2020;
however, there was not a successful resolution to the comments.
In MRP 3.0 (2022), Provision C.3.g.vi.(2) requires CCCWP Permittees to submit a
new Technical Report, subject to the Executive Officer’s approval, describing how
the CCCWP Permittees will implement the new standard. Provision C.3.g.v. directs
CCCWP Permittees to require development projects subject to HM to use the
methods and criteria in the current edition of the Stormwater C.3 Guidebook until
the Executive Officer approves the Technical Report. Alternatively, CCCWP
Permittees may implement the HM Standard in Provision C.3.g.ii., which references
BAHM.
In 2023, Haley & Aldrich conducted a MRP 3.0 Hydromodification Management
Compliance Options study that examined the benefits, challenges, and feasibility of
2 Order R2-2006-0050
A P P E N D I X E — R E G U L A T O R Y A N D T E C H N I C A L B A C K G R O U N D
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four possible approaches for Contra Costa Permittees to complying with the
requirements of MRP 3.0 Provision C.3.g. Option 3, directing applicants for
development projects subject to HM requirements to use BAHM to demonstrate
HM compliance, scored the highest in the option criteria analysis, with a
distinguishing feature of being the only option that would have the greatest regional
consistency, easiest pathway to compliance and lowest implementation cost.
Thus, the 9th Edition Guidebook explains the updated HM compliance methodology
using BAHM and provides related guidance and examples.
Applicability: Maps and Exemptions. The flow-control standard applies to projects
which create or replace one acre or more of impervious area and for which applications
for development approvals were deemed complete after 14 October 2006. See
Chapter 1, including Table 1-1.
Projects may be exempted from HM requirements if any of the following apply:
The post-project impervious area is less than, or the same as, the pre-
project impervious area.
In previous editions (prior to the 9th Edition), CCCWP adopted, and incorporated
into the Guidebook, requirements that each applicant for approval of an HM project
would need to determine if any exemptions applied, and document any claimed
exemptions with evidence (for example, show that each reach of drainage from the
project site to the Bay or Delta was pipe or hardened channel).
The Tentative Order for MRP 2.0 (2015) unexpectedly included a requirement that
Permittees without applicability maps produce maps. CCCWP elected not to contest
this requirement, because some Permittees felt that having a map would streamline
the review process for their applicants. The development of GIS technology since
2005 meant that maps could be prepared and updated more quickly and accurately
than 10 years previous.
CCCWP prepared a draft map, with a few areas “to be determined” and submitted
it to the Water Board in September 2017. Updates were made to the draft map were
made in 2023 and submitted to the Water Board. Approval was received in February
2024.
Sites that Are Already Partially Developed. At the discretion of municipal staff,
on HM projects applicants may provide treatment-only controls for an impervious
square footage that is less than or equal to the pre-project impervious square
footage. Treatment + HM controls must be provided for the remaining impervious
square footage.
The rationale for this guidance is that the combination of treatment-only and
treatment + HM controls will meet the Permit requirement that runoff flow and
volume be managed so that post-project runoff doesn’t exceed estimated pre-
project rates and durations. The rationale is detailed in a 10 March 2009 memo,
S T O R M W A T E R C . 3 C O M P L I A N C E
E-18 9th Edition — APRIL 12, 2024
“Guidance on Flow Control for Development Projects on Sites that are Already
Partially Developed,” available on the CCCWP website.
Selection and Design of HM Controls. The LID design procedure and criteria in
Chapter 3 have been developed and refined, progressively for over a decade, to meet
the needs of Contra Costa development projects. In addition to meeting the HM
standard, projects designed using Chapter 3 will also meet the LID goals and
principles in MRP Provision C.3.c.
Most projects use a combination of site design measures (self-treating and self-
retaining areas) and bioretention facilities to meet runoff treatment and flow-control
requirements. Design guidance and criteria for more complex options with smaller
surface footprints—“cistern + bioretention” and “bioretention + vault”—are in
Chapters 3 and 4 and may be used if space on the site is constrained.
9th Edition – APRIL 12, 2024
9th Edition – APRIL 12, 2024
Green Infrastructure Details
Appendix F
Introduction on the Development and Use of the CCCWP Typical GI Details
Over the past decade, municipalities across the Bay Area have been developing comprehensive Typical Green
Infrastructure Details to assist engineers and landscape architects in the design of green infrastructure. Rather
than recreate details developed by other agencies and/or start from scratch, CCCWP has reviewed the best
available green infrastructure details and has decided to adopt the County of San Mateo Department of Public
Works Green Infrastructure Typical Details (SMC GI Details), Version 2.0, dated June 2022, as its primary
resource. The County of San Mateo used the San Francisco Public Utilities Commission’s GI Typical Details as
the base model and modified the entire set of details to align with their separate storm sewer system
requirements, standard road sections and other requirements. Additionally, the SMC GI Details includes new
details that are not within the SFPUC details.
CCCWP has modified a select subset of bioretention detail sheets to better align with C.3 Guidebook and other
County-specific requirements and best practices. These modified details sheets (GEN 0.1, BP 3.1, BP 3.2, BP
4.1 and BP 4.5) are identified with an asterisk following the sheet numbers in the sheet index as well as the
sheets themselves. No other detail sheets from the SMC GI Details have been modified at this time. Designers
using unmodified details will need to revise them as necessary to comply with CCCWP and local agency
requirements in addition to modifying them to accommodate project-specific conditions. Please note that the
modified details refer to other bioretention details that have not been modified to align with CCCWP C.3
requirements so Designers will need to carefully review those referenced details and modify them accordingly
when incorporating them into Design Drawings.
All details included in this set are available in AutoCAD drawing format for use by CCCWP member agencies.
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COUNTY OF SAN MATEO
DEPARTMENT OF PUBLIC WORKS
GREEN INFRASTRUCTURE
TYPICAL DETAILS
(JUNE 2022, VERSION 2.0-DRAFT)
THE FOLLOWING DETAILS USE THE SAN FRANCISCO PUBLIC UTILITES COMMISSION'S (SFPUC'S) GREEN INFRASTRUCTURE TYPICAL
DETAILS AS THE BASE MODEL AND INCLUDE MODIFICATIONS AND/OR ADDITIONS TO ALIGN WITH COUNTY OF SAN MATEO CODES,
REQUIREMENTS, STANDARD ROAD SECTIONS AND BEST PRACTICES. THE COUNTY OF SAN MATEO WISHES TO THANK THE SFPUC
FOR THE GENEROUS USE OF THEIR MATERIALS.
SHEET INDEX (1 OF 2)GREEN INFRASTRUCTURE
TYPICAL DETAILS
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GENERAL INFORMATION
GEN 0.1 USER GUIDE
PERVIOUS PAVEMENT (PP)
PP 1.1 DESIGNER NOTES (1 OF 2)
PP 1.2 DESIGNER NOTES (2 OF 2)
PP 1.3 KEY MAP
PP 2.1 MATERIAL SECTIONS - PERMEABLE PAVERS
PP 3.1 MATERIAL SECTIONS - PERVIOUS CONCRETE
PP 4.1 MATERIAL SECTIONS - POROUS ASPHALT
PAVEMENT COMPONENTS (PC)
PC 1.1 EDGE TREATMENTS - DESIGNER NOTES
PC 1.2 EDGE TREATMENTS - KEY MAP
PC 1.3 EDGE TREATMENTS - VEHICULAR APPLICATIONS
PC 1.4 EDGE TREATMENTS - PEDESTRIAN APPLICATIONS (1 OF 2)
PC 1.5 EDGE TREATMENTS - PEDESTRIAN APPLICATIONS (2 OF 2)
PC 1.6 EDGE TREATMENTS - PAVER AT STRUCTURES
PC 2.1 SUBSURFACE CHECK DAMS - DESIGNER NOTES
PC 2.2 SUBSURFACE CHECK DAMS
PC 3.1 SUBSURFACE OVERFLOWS - DESIGNER NOTES
PC 3.2 SUBSURFACE OVERFLOW
PC 3.3 SUBSURFACE UNDERDRAIN
PC 3.4 UNDERDRAIN PIPE
BIORETENTION PLANTER (BP)
BP 1.1 DESIGNER NOTES (1 OF 2)
BP 1.2 DESIGNER NOTES (2 OF 2)
BP 2.1 STORMWATER PLANTER WITH PARKING - PLAN
BP 2.2 STORMWATER PLANTER WITH PARKING - SECTIONS
BP 3.1 STORMWATER PLANTER WITHOUT PARKING - PLAN
BP 3.2 STORMWATER PLANTER WITHOUT PARKING - SECTIONS
BP 3.3 STORMWATER BARRIER PLANTER - CL. 4 BIKEWAY - PLAN
BP 3.4 STORMWATER BARRIER PLANTER - CL. 4 BIKEWAY - SECTION
BP 4.1 STORMWATER CURB EXTENSION - ALTERNATIVE 1
BP 4.2 STORMWATER CURB EXTENSION - ALTERNATIVE 2
BP 4.3 STORMWATER CURB EXTENSION - ALTERNATIVE 3
BP 4.4 STORMWATER CURB EXTENSION - ALTERNATIVE 4
BP 4.5 STORMWATER CURB EXTENSION - ALTERNATIVE 5
BP 4.6 STORMWATER CURB EXTENSION - ALTERNATIVE 6
BP 5.1 PARCEL PLANTER - DESIGNER NOTES (1 OF 2)
SHEET
NO.SHEET TITLE
BP 5.2 PARCEL PLANTER - DESIGNER NOTES (2 OF 2)
BP 5.3 PARCEL PLANTER PLAN - ALTERNATIVE 1
BP 5.4 PARCEL PLANTER PLAN - ALTERNATIVE 2
BP 5.5 PARCEL PLANTER - RAISED PLANTER SECTION
BP 5.6 PARCEL PLANTER - AT GRADE PLANTER SECTION
BP 5.7 PARCEL PLANTER - PLANTER ON STRUCTURE SECTION
BIORETENTION BASIN (BB)
BB 1.1 DESIGNER NOTES
BB 2.1 ROADSIDE SECTION TYPE 1
BB 2.1.1 ROADSIDE SECTION TYPE 2
BB 2.2 PARCEL SECTION
BB 2.3 ROADSIDE LAYOUT TYPE 3, STREET WITH VALLEY GUTTER
BB 2.4 ROADSIDE SECTION TYPE 3
BIORETENTION COMPONENTS (BC)
BC 1.1 EDGE TREATMENTS - DESIGNER NOTES
BC 1.2 EDGE TREATMENTS - VEHICULAR APPLICATIONS (1 OF 3)
BC 1.2.1 EDGE TREATMENTS - VEHICULAR APPLICATIONS
MODIFICATIONS (2 OF 3)
BC 1.3 EDGE TREATMENTS - VEHICULAR APPLICATIONS (3 OF 3)
BC 1.4 EDGE TREATMENTS - PEDESTRIAN APPLICATIONS (1 OF 4)
BC 1.5 EDGE TREATMENTS - PEDESTRIAN APPLICATIONS (2 OF 4)
BC 1.5.1 EDGE TREATMENTS - PEDESTRIAN APPLICATIONS (3 OF 4)
BC1.5.2 EDGE TREATMENTS - PEDESTRIAN APPLICATIONS (4 OF 4)
BC 1.6 EDGE TREATMENTS - LATERAL BRACING (1 OF 2)
BC 1.7 EDGE TREATMENTS - LATERAL BRACING (2 OF 2)
BC 1.8 EDGE TREATMENTS - METAL FENCING
BC 1.9 EDGE TREATMENTS - WOOD FENCING
BC 1.10 EDGE TREATMENTS - SEAT WALL
BC 1.11 EDGE TREATMENTS - TIMBER FOOT BRIDGE LAYOUT
BC 1.12 EDGE TREATMENTS - TIMBER FOOT BRIDGE SECTION (1 OF 2)
BC 1.13 EDGE TREATMENTS - TIMBER FOOT BRIDGE SECTION (2 OF 2)
BC 2.1 INLETS - DESIGNER NOTES
BC 2.2 INLETS - CURB CUT WITH GUTTER MODIFICATION
BC 2.2.1 INLETS - CURB CUT WITH METAL PLATE TOP
BC 2.3 INLETS - CURB CUT AT BULB OUT
BC 2.3.1 INLETS - CURB CUT AT BULB OUT - MODIFICATION WITH
METAL PLATE TOP
BC 2.4 INLETS - CURB CUT WITH TRENCH DRAIN
BC 2.4.1 INLETS - CURB CUT WITH TRENCH DRAINS MODIFICATIONS
SHEET
NO.SHEET TITLE
BC 2.5 INLETS - TRASH CAPTURE, CURB CUT WITHIN TRENCH DRAIN
BC 2.6 INLETS - EMBEDDED ROCK ENERGY DISSIPATOR
BC 3.1 OUTLETS - DESIGNER NOTES
BC 3.2 OUTLETS - CURB CUT
BC 3.3 OUTLETS - CURB CUT WITH TRENCH DRAIN
BC 3.3.1 OUTLETS - CURB CUT WITH TRENCH DRAIN - MODIFICATION
AND METAL PLATE TOP OUTLET
BC 3.4 OUTLETS - OVERFLOW STRUCTURES
BC 4.1 SOIL AND AGGREGATE LAYERS
BC 5.1 UNDERDRAINS - DESIGNER NOTES
BC 5.2 UNDERDRAINS
BC 6.1 CHECK DAMS - DESIGNER NOTES
BC 6.2 CHECK DAMS
SUBSURFACE INFILTRATION (SI)
SI 1.1 DESIGNER NOTES (1 OF 2)
SI 1.2 DESIGNER NOTES (2 OF 2)
SI 2.1 INFILTRATION SYSTEM - LARGE SYSTEM - PLAN
SI 2.2 INFILTRATION SYSTEM - LARGE SYSTEM - SECTION
SI 3.1 SHALLOW DRY WELL - SMALL SYSTEM - PLAN
SI 3.2 SHALLOW DRY WELL - SMALL SYSTEM - SECTION -
ALTERNATIVE
SI 4.1 DEEP DRY WELL - SMALL SYSTEM - PLAN & SECTION
GENERAL COMPONENTS (GC)
GC 1.1 LINERS - DESIGNER NOTES
GC 1.2 LINERS - LINERS AND ATTACHMENTS
GC 2.1 UTILITY CROSSINGS - DESIGNER NOTES (1 OF 2)
GC 2.2 UTILITY CROSSINGS - DESIGNER NOTES (2 OF 2)
GC 2.3 UTILITY CROSSINGS - BIORETENTION
GC 2.4 UTILITY CROSSINGS - BIORETENTION SECTIONS (1 OF 2)
GC 2.5 UTILITY CROSSINGS - BIORETENTION SECTIONS (2 OF 2)
GC 2.6 UTILITY CROSSINGS - PERVIOUS PAVEMENT
GC 2.7 UTILITY CROSSINGS - PERVIOUS PAVEMENT
SECTIONS (1 OF 2)
GC 2.8 UTILITY CROSSINGS - PERVIOUS PAVEMENT
SECTIONS (2 OF 2)
GC 2.9 UTILITY CROSSINGS - LINER PENETRATIONS
GC 2.10 UTILITY CROSSINGS - WALL PENETRATIONS (1 OF 2)
GC 2.11 UTILITY CROSSINGS - WALL PENETRATIONS (2 OF 2)
GC 2.12 UTILITY CROSSINGS - UTILITY TRENCH DAM
GC 3.1 UTILITY CONFLICTS - DESIGNER NOTES
B 2.INLET - EMBEDDED R K ENER Y DI IPAT
B .TLET - DE I NER N TE
B .TLET - RB
.4 TLET - VERFL W TR T RE
1.LINER - DE I NER N TE
1.LINER - LINER AND ATTA HMENT
B 1.ED E TREATMENT - DE I NER N TE
B 1.ED E TREATMENT - VEHI ULAR APPLI ATI N 1 F 3
B 1.2.ED E TREATMENT - VEHI LAR APPLI ATI N
DIFI ATI N 2 F 3
B 1.ED E TREATMENT - VEHI ULAR APPLI ATI N 3 F 3
B 1.4 ED E TREATMENT - PEDE TRIAN APPLI ATI N 1 F 4
B 1.ED E TREATMENT - PEDE TRIAN APPLI ATI N 2 F 4
B 1..ED E TREATMENT - PEDE TRIAN APPLI ATI N 3 F 4
B 1..ED E TREATMENT - PEDE TRIAN APPLI ATI N 4 F 4
B 1.ED E TREATMENT - LATERAL BRA IN 1 F 2
B 1.ED E TREATMENT - LATERAL BRA IN 2 F 2
B 2.INLET - RB T WITH TTER M DIFI ATI
BP .T RMWATER PLANTER WITH T PARKIN - PLA
BP .T RMWATER PLANTER WITH T PARKIN - E TI N
BP 4.T RMWATER RB EXTEN I N - ALTERNATIVE
BP 4.T RMWATER RB EXTEN I - ALTERNATIVE
B 2.INLET - RB T AT B LB
Unmodified details referenced within the CCCWP modified detailsDetails have been updated for CCCWP
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GENERAL COMPONENTS (GC) CONTINUED
GC 3.2 UTILITY CONFLICTS - STREET/TRAFFIC LIGHT POLES
GC 3.3 UTILITY CONFLICTS - PARKING METERS
GC 4.1 OBSERVATION PORT - DESIGNER NOTES
GC 4.2 OBSERVATION PORT - BIORETENTION
GC 4.3 OBSERVATION PORT - PERVIOUS PAVEMENT
GC 5.1 CLEANOUTS
TREE WELL FILTER (TW)
TW 1.1 TREE WELL FILTER - DESIGNER NOTES
TW 1.2 TREE WELL FILTER - CONNECTED TREE WELLS WITH
PARKING - PLAN
TW 1.3 TREE WELL FILTER - CONNECTED TREE WELLS WITH
PARKING - SECTION
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USER GUIDE: HOW TO USE THESE GI TYPICAL DETAILS
THE DETAILS PROVIDED ARE THE COUNTY OF SAN MATEO DEPARTMENT OF PUBLIC WORKS GREEN INFRASTRUCTURE TYPICAL DETAILS , DATED JUNE 2022, WHICH WERE BASED UPON THE SAN FRANCISCO
PUBLIC UTILITIES COMMISSION'S GREEN INFRASTRUCTURE (GI) TYPICAL DETAILS, VERSION 2.0, DATED SEPTEMBER 2016. A SELECT SUBSET OF DETAILS (IDENTIFIED WITH AN ASTERISK IN THE SHEET
NUMBER) HAVE BEEN MODIFIED BY CCCWP TO PROVIDE REFERENCE DETAILS THAT BETTER ALIGN WITH THE STORMWATER C.3 GUIDEBOOK, COUNTY-SPECIFIC REQUIREMENTS AND BEST PRACTICES.
THESE TYPICAL DETAILS (MODIFIED AND UNMODIFIED) WERE DEVELOPED TO BE REVISED AND CUSTOMIZED FOR EACH INDIVIDUAL PROJECT BY DESIGN PROFESSIONALS. THEY SHOW TYPICAL
CONFIGURATIONS, RATHER THAN A REQUIRED COUNTY STANDARD CONFIGURATION. THIS DISTINCTION IS DELIBERATE. WE RECOGNIZE THAT TO CREATE GI PROJECTS THAT ARE FUNCTIONAL,
CONTEXTUAL, AND AESTHETIC, DESIGN PROFESSIONALS MUST USE THEIR PROFESSIONAL JUDGMENT AND CREATIVE THINKING TO BE RESPONSIVE TO EACH SITE-SPECIFIC CONDITION, E.G., IN-SITU SOILS,
VEHICULAR LOADS, DRAINAGE PATTERNS, ETC.
AUTOCAD (ACAD) DRAWINGS OF THESE TYPICAL DETAILS ARE PROVIDED SUCH THAT THE DESIGN PROFESSIONALS MUST MODIFY THE PLAN, SECTIONS, CALL-OUTS, AND/OR CONSTRUCTION NOTES TO
ADDRESS THE PROJECTS SITE-SPECIFIC CONDITIONS AND LOCAL PERMITTING AGENCY REQUIREMENTS.
CONTENT
THESE TYPICAL DETAILS ARE FORMATTED, ORGANIZED, AND DEVELOPED WITH THE NECESSARY INFORMATIONAL TOOLS TO GUIDE THE DESIGN PROFESSIONAL THROUGH THE PROPER SELECTION, LAYOUT,
AND DESIGN OF GI STORMWATER CONTROL MEASURE AND THE SELECTION OF APPROPRIATE SITE-SPECIFIC STORMWATER CONTROL MEASURE COMPONENT DETAILS (I.E. INLETS, OUTLETS, AND EDGE
TREATMENTS, ETC.). THESE TYPICAL DETAILS PROVIDE THE FOLLOWING ORGANIZATION:
PURPOSE: SUMMARY OF EACH FACILITY'S INTENDED PERFORMANCE AND FUNCTION.
DESIGNER NOTES & GUIDELINES: TECHNICAL DESIGN REQUIREMENTS AND/OR SIZING CRITERIA GUIDELINES ARE PROVIDED SUCH THAT EACH FACILITY IS DESIGNED AND APPROPRIATELY
CUSTOMIZED BY THE DESIGN PROFESSIONAL.
LAYOUT REQUIREMENTS: TECHNICAL INFORMATION, DESIGN REQUIREMENTS, AND REFERENCE TO RELATED COUNTY REQUIREMENTS.
DESIGNER CHECKLIST: TECHNICAL DESIGN INFORMATION THAT MUST BE DETERMINED AND SHOWN IN THE CONSTRUCTION DOCUMENTS (CDs) TO ENSURE PROPER DESIGN AND CONSTRUCTABILITY.
STORMWATER CONTROL MEASURE PLANS: TYPICAL PLAN VIEW WITH GENERAL CONFIGURATION FOR PROPER FUNCTION. DIMENSIONAL LAYOUT AND EDGING MATERIALS SHOULD BE ADJUSTED
BASED ON PROPOSED SITE DESIGN AND PROGRAMING. [ADJUST ACAD DETAIL CALL-OUTS AND REFERENCES FOR USE IN CDs]
STORMWATER CONTROL MEASURE SECTIONS AND PROFILES: A TYPICAL SECTION AND/OR PROFILE WITH GENERAL CONFIGURATION FOR PROPER FUNCTION. DIMENSIONAL LAYOUT AND EDGING
MATERIALS SHOULD BE ADJUSTED BASED ON PROPOSED SITE DESIGN AND PROGRAMING. [ADJUST ACAD DETAILS CALL-OUTS AND REFERENCES FOR USE IN CDs]
CONSTRUCTION NOTES: CONSTRUCTION RELATED NOTES FOR USE BY THE CONTRACTOR. [ADJUST ACAD NOTES FOR USE IN CDs]
NAVIGATION
THE TYPICAL DETAILS HAVE BEEN DEVELOPED WITH A NAVIGATION SYSTEM AND KEY BAR TO ASSIST THE DESIGN PROFESSIONALS WITH LINKING THE SPECIFIC STORMWATER CONTROL MEASURE TO
RELEVANT DESIGN NOTES AND POSSIBLE DETAIL COMPONENTS. EXAMPLE KEY BAR:
USE ON CONSTRUCTION DOCUMENTS
DESIGN PROFESSIONALS USING THE AUTOCAD DRAWINGS MUST REVIEW AND ADJUST THE DETAILS AND CONSTRUCTION NOTES TO ADDRESS THEIR SITE-SPECIFIC CONDITIONS. TO ALLOW FOR SITE-
SPECIFIC DESIGN ADJUSTMENTS THE TYPICAL DETAILS ARE DEVELOPED AS “NOT FOR CONSTUCTION” DRAWINGS. TITLE BLOCKS ARE PROVIDED FOR DOCUMENT ORGANIZATION AND REFERENCE ONLY.
x DO NOT INCLUDE THE NON-ADJUSTED DETAIL WITH TITLE BLOCK WITHIN THE CONSTRUCTION DOCUMENTS.
x DO NOT INCLUDE NON-ADJUSTED DETAIL PLANS, SECTIONS, OR CONSTRUCTION NOTES WITHIN THE CONSTRUCTION DOCUMENTS.
x DO NOT REFERENCE THE GI TYPICAL DETAIL SHEET NAME AND/OR NUMBER (I.E. BP 2.1) AS A STANDARD DETAIL CALL-OUT WITHIN THE CONSTRUCTION DOCUMENTS.
x DO NOT EXPECT CONTRACTORS TO CONDUCT CALCULATIONS OR BE RESPONSIBLE FOR MISSING DESIGN INFORMATION.
PC
1.5
PC
1.4
PC
1.3
PC
1.2
PC
1.1
PC
1.6
PC
2.2
PC
2.1
PC
3.2
PC
3.1
PC
3.3
KEY
MAPNOTES COMPONENTS
EDGE TREATMENTS
COMPONENTSNOTES
SUBSURFACE CHECK DAMS
NOTES
SUBSURFACE OUTLETS
PC
3.4
COMPONENTS
GREEN INFRASTRUCTURE
TYPICAL DETAILS
PERVIOUS PAVEMENTGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
1.1
PP
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RELATED COMPONENTS
EDGE TREATMENTS:
CHECK DAMS:
OVERFLOWS:
LINERS:
UTILITY CROSSINGS:
UTILITY CONFLICTS:
OBSERVATION PORTS:
CLEANOUTS:
GC
1.2
PURPOSE:
PERVIOUS PAVEMENT (PAVEMENT) CONTROLS PEAK FLOWS AND VOLUMES OF STORMWATER RUNOFF VIA INFILTRATION THROUGH THE PAVEMENT
SURFACE, STORAGE IN THE PAVEMENT SECTION, INFILTRATION INTO NATIVE SOIL, AND OVERFLOW THROUGH OPTIONAL SUBSURFACE OUTLETS.
RUNOFF IS TREATED AS IT INFILTRATES INTO UNDERLYING NATIVE SOIL.
DESIGNER NOTES & GUIDELINES:
1. THE DESIGNER MUST ADAPT PLAN, SECTION DRAWINGS, AND CALCULATE DEPTH TO ADDRESS SITE-SPECIFIC CONDITIONS.
2. ALL PAVEMENT SYSTEMS MUST BE DESIGNED BY A LICENSED ENGINEER IN ACCORDANCE WITH THE AASHTO GUIDE, INTERLOCKING
CONCRETE PAVER INSTITUTE DESIGN MANUAL, OR CALTRANS DESIGN MANUAL FOR DESIGN OF PAVEMENT STRUCTURES BASED ON
SITE-SPECIFIC CONDITIONS INCLUDING TRAFFIC LOADS AND SUBGRADE CONDITIONS. PAVEMENT SECTIONS SET FORTH IN THESE TYPICAL
DETAILS ARE PROVIDED TO REPRESENT THE ANTICIPATED RANGE OF DESIGN REQUIREMENTS, BASED ON "GOOD" AND "POOR" SOIL
CHARACTERIZATIONS NORMALLY ENCOUNTERED IN SAN MATEO COUNTY. ACTUAL SECTION DEPTHS MUST BE DETERMINED AS DESCRIBED IN
GUIDELINE #3, BELOW. SEE TABLES BELOW FOR TRAFFIC LOADING AND EFFECTIVE ROADBED SOIL RESILIENT MODULUS ASSUMPTIONS USED
IN DEVELOPING THESE TYPICAL SECTIONS.
3. TRAFFIC LOADING ASSUMPTIONS:
SUBGRADE ASSUMPTIONS:
4. GEOTECHNICAL EVALUATION OF SUBGRADE SOILS TO VERIFY THEIR STRUCTURAL SUITABILITY FOR PERVIOUS PAVEMENT INSTALLATIONS IS
REQUIRED.
5. THE PERVIOUS PAVEMENT FACILITY MUST BE DESIGNED TO PROVIDE SUFFICIENT SUBSURFACE STORAGE IN THE PAVEMENT SECTION TO
MEET PROJECT HYDROLOGIC PERFORMANCE GOALS. THE SECTION THICKNESS WILL BE A FUNCTION OF THE SUBGRADE INFILTRATION RATE
(DRAINAGE COEFFICIENT), SUBGRADE SLOPE, AND THE HEIGHT AND SPACING OF SUBSURFACE CHECK DAMS. SEE PC 2.1 AND PC 2.2.
6. ENTIRE PAVEMENT BASE SECTION MAY BE USED TO MEET SUBSURFACE STORAGE REQUIREMENTS.
7. SUBSURFACE STORAGE DRAWDOWN TIME (I.E. TIME FOR MAXIMUM SUBSURFACE STORAGE VOLUME TO INFILTRATE INTO SUBGRADE AFTER
THE END OF A STORM) SHOULD NOT EXCEED 48 HOURS. DRAWDOWN TIME IS CALCULATED AS THE MAXIMUM SUBSURFACE PONDING DEPTH
DIVIDED BY THE NATIVE SOIL INFILRATION RATE.
8. THE DESIGNER MUST ENSURE THAT THE PAVEMENT EDGES ARE RESTRAINED AND THAT WATER IS CONTAINED IN THE PAVEMENT SECTION AS
NEEDED TO PROTECT ADJACENT PAVEMENT SECTIONS OR STRUCTURES. SEE EDGE TREATMENTS (PC 1.1 THROUGH PC 1.6) FOR GUIDANCE
ON DESIGN OF THESE COMPONENTS.
9. THE DESIGNER MUST EVALUATE UTILITY SURVEYS FOR POTENTIAL UTILITY CROSSINGS OR CONFLICTS. REFER TO GC 2.1 - GC 2.12 FOR UTILITY
CROSSING DETAILS AND GC 3.1 - GC 3.3 FOR UTILITY CROSSING CONFLICT DETAILS.
10. GEOTECHNICAL EVALUATION OF SEASONAL HIGH GROUNDWATER LEVEL IS REQUIRED TO VERIFY MINIMUM 5 FEET SEPARATION BETWEEN
BASE OR RESERVOIR COURSE AND GROUNDWATER.
11. ALL PERVIOUS PAVEMENT DESIGN MUST COMPLY WITH MUNICIPAL STANDARD ACCESSIBILITY/ADA REQUIREMENTS.
GC
5.1
RELATED SPECIFICATIONS CSI NO.
PERMEABLE/PERVIOUS PAVERS:
- PERMEABLE/PERVIOUS PAVERS
- JOINT FILLER AGGREGATE
- PAVEMENT BASE
- EDGE RESTRAINTS
- GEOTEXTILE FOR SOIL SEPARATION
32 14 43
PERVIOUS CONCRETE PAVEMENT:
- PERVIOUS CONCRETE
- PAVEMENT BASE
- GEOTEXTILE FOR SOIL SEPARATION
32 13 43
POROUS ASPHALT PAVEMENT:
- POROUS ASPHALT
- PAVEMENT BASE
- GEOTEXTILE FOR SOIL SEPARATION
32 12 43
DESIGN
ASSUMPTION
MODERATE
VEHICULAR LIGHT VEHICULAR PEDESTRIAN
EQUIVALENT SINGLE AXLE LOADS*2,000,000 40,000 800
TRAFFIC INDEX (TI)**10 6.5 4
* SEE AASHTO GUIDE FOR DESIGN OF PAVEMENT STRUCTURES FOR DEFINITIONS
** SEE CALTRANS HIGHWAY DESIGN MANUAL FOR DEFINITIONS
-PC
1.1
PC
1.6
PP
4.1
PP
3.1
PP
2.1
PP
1.3
PP
1.2
PP
1.1
-GC
2.1
GC
2.12
-PC
3.1
PC
3.3
GC
1.1
DESIGN ASSUMPTION GOOD SOILS POOR SOILS
EFFECTIVE ROADBED SOIL RESILIENT MODULUS, M (PSI)*6,800 3,700
CALIFORNIA R-VALUE **33.3 15.6
DRAINAGE COEFFICIENT, m *1.15 0.75
LAYER COEFFICIENT, a * FOR OPEN GRADED AGGREGATE BASE 0.08
* SEE AASHTO GUIDE FOR DESIGN OF PAVEMENT STRUCTURES FOR DEFINITIONS
** SEE CALTRANS HIGHWAY DESIGN MANUAL FOR DEFINITIONS
PC
2.2
PC
2.1
GC
4.3
GC
4.1
-GC
3.1
GC
3.3
PERVIOUS PAVEMENTGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
1.2
PP
FILE NO.
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LAYOUT REQUIREMENTS:
1. ALL PERVIOUS PAVEMENT APPLICATIONS SHALL CONFORM TO THE CURRENT SMC PUBLIC WORKS
POLICIES REGARDING PERVIOUS PAVEMENT. THE DESIGN MUST COMPLY WITH SMC PUBLIC
WORKS STANDARD ACCESSIBILITY REQUIREMENTS.
2. THE ALLOWABLE CATCHMENT AREA CONTRIBUTING RUN-ON TO A PERVIOUS PAVEMENT FACILITY
IS A MAXIMUM OF 2:1 RATIO OF AREA CONTRIBUTING RUN-ON TO PERVIOUS PAVEMENT AREA
UNLESS A LOWER RATIO IS RECOMMENDED BY THE MANUFACTURER. THE DESIGNER SHOULD
CONSIDER THE INCREASED MAINTENANCE REQUIREMENTS ASSOCIATED WITH HIGHER RUN-ON
RATIOS WHEN DESIGNING THE FACILITY.
3. "PERVIOUS PAVERS" REFER TO PAVERS THAT ALLOW WATER TO FLOW THROUGH ACTUAL UNIT
PAVER WHILE "PERMEABLE PAVERS" REFER TO PAVER SYSTEMS THAT ONLY ALLOW WATER TO
PASS THROUGH JOINTS.
4. WHEN DESIGNED TO ACCEPT RUN-ON FROM OTHER CATCHMENT AREAS, PERVIOUS PAVEMENT
AREAS MUST BE PROTECTED FROM SEDIMENTATION WHICH CAN CAUSE CLOGGING AND
DIMINISHED FACILITY PERFORMANCE. THE FOLLOWING REQUIREMENTS APPLY FOR RUN-ON
CONTRIBUTIONS:
x RUN-ON FROM LAWN, LANDSCAPE OR OTHER ERODIBLE SURFACES IS DISCOURAGED. IF
MINOR RUN-ON FROM LAWN OR LANDSCAPE AREAS IS UNAVOIDABLE, THOSE ERODIBLE
AREAS MUST BE FULLY STABILIZED.
x CONCENTRATED RUN-ON SHOULD BE DISPERSED PRIOR TO DISCHARGE TO A PERVIOUS
PAVEMENT FACILITY.
5. WEARING COURSE SHALL BE SET FLUSH (± 3/16 INCH) WITH ADJACENT WALKING SURFACES.
6. WEARING COURSE SHALL HAVE A MINIMUM SURFACE SLOPE OF 0.5% TO ALLOW FOR SURFACE
OVERFLOW AND A MAXIMUM SURFACE SLOPE AS LISTED BELOW:
a. POROUS ASPHALT SURFACE: = 5 PERCENT SLOPE
b. PERVIOUS CONCRETE SURFACE: = 10 PERCENT SLOPE
c. PERMEABLE UNIT PAVERS: = 12 PERCENT SLOPE (PER MANUFACTURER'S RECOMMENDATION)
SLOPES EXCEEDING 2% MAY REQUIRE SUBSURFACE CHECK DAMS (REFER TO PC2.1).
7. WHILE THERE IS NO MAXIMUM SLOPE FOR THE SUBGRADE UNDER THE PERVIOUS PAVEMENT
COURSES, THERE MAY BE ENGINEERING CHALLENGES ASSOCIATED WITH SUBSURFACE CHECK
DAM REQUIREMENTS ON SUBGRADE SLOPES EXCEEDING 5%. SEE SUBSURFACE CHECK DAMS
(PC 2.1 AND PC 2.2).
8. PERMEABLE GEOTEXTILES MAY BE USED ALONG BASE AND SIDES. IMPERMEABLE LINERS MAY
BE USED ALONG THE SIDES BUT MAY NOT BE USED ALONG BASE.
DESIGNER CHECKLIST (MUST SPECIFY, AS APPLICABLE):
PERVIOUS PAVEMENT SPECIFICATIONS AND/OR PAVER TYPE AND GAP WIDTH
PERVIOUS PAVEMENT WIDTH AND LENGTH
ELEVATIONS AND CONTROL POINTS AT EVERY CORNER OR POINT OF TANGENCY
THICKNESS OF EACH LAYER IN THE PAVEMENT SECTION
JOINT SPACING AND TYPE
SUBGRADE SLOPE
SUBSURFACE CHECK DAM SPACING, HEIGHT, AND TYPE
ELEVATIONS OF EACH PIPE INLET AND OUTLET INVERT
TYPE AND DESIGN OF PERVIOUS PAVEMENT COMPONENTS (E.G., EDGE TREATMENTS,
OUTLETS, UNDERDRAINS, etc.)
PP
4.1
PP
3.1
PP
2.1
PP
1.3
PP
1.2
PP
1.1
1
2
3
KEYNOTES:
PERMEABLE PAVERS AND PERVIOUS PAVERS PP 2.1
PERVIOUS CONCRETE PP 3.1
POROUS ASPHALT PP 4.1
321
SIDEWALK
THROUGHWAY
COURTESY ZONE
1 2
COUNTY OF SAN MATEO
STD PAVEMENT SECTION
PLANTERPEDESTRIAN
ZONE
VEHICULAR
ZONE
3
CURB & GUTTER (TYP)
321
ACCESSIBLE PATH
PARKING LANE
1
COURTESY ZONE
2 3
PERVIOUS PAVEMENTGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
1.3
PP
FILE NO.
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4.1
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3.1
PP
2.1
PP
1.3
PP
1.2
PP
1.1
GAP WIDTH (IN)JOINT FILLER AGGREGATE*
3/8 OR 1/2 ASTM NO. 8
1/4 ASTM NO. 9 OR 89
1/8 ASTM NO. 10 **
* PROVIDED FOR REFERENCE ONLY, FOLLOW MANUFACTURER'S
RECOMMENDATIONS
** FOR PERVIOUS PAVERS ONLY, ASTM NO. 20 SAND NOT
ALLOWED PER MANUFACTURERS RECOMMENDATIONS.
MODERATE
VEHICULAR
LIGHT
VEHICULAR PEDESTRIAN
LAYER MATERIAL TYPE*GOOD
SOILS**
POOR
SOILS**
GOOD
SOILS**
POOR
SOILS**
GOOD
SOILS**
POOR
SOILS**
PERMEABLE/PERVIOUS
PAVERS 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8
LEVELING COURSE
ASTM NO. 8 2 2 2 2 2 2
BASE COURSE
ASTM NO. 57 OR CALTRANS
CLASS 1 TYPE PERMEABLE
6 6 6 4 4 4
RESERVOIR COURSE
ASTM NO. 2, 3, OR 57 22 28 - 10 - -
* MATERIAL FINER THAN NO. 100 SIEVE SHALL NOT EXCEED 2 PERCENT FOR ANY AGGREGATE LAYER
(LICENSED PROFESSIONAL TO SELECT AGGREGATE).
** "GOOD" AND "POOR" SOIL CLASSIFICATIONS BASED ON AASHTO GUIDE FOR DESIGN OF PAVEMENT
STRUCTURES. SEE DESIGNER NOTES FOR SUBGRADE ASSUMPTIONS. (LICENSED PROFESSIONAL MUST
CALCULATE REQUIRED DEPTH BASED ON SITE CONDITIONS).
MINIMUM MATERIAL THICKNESS (IN):TYPICAL JOINT FILLER AGGREGATE SIZE:
C
D
XX" GAP WIDTHJOINT FILLER
OPTIONAL GEOTEXTILE FOR
SOIL SEPARATION, PER
ENGINEER'S RECOMMENDATION,
SEE SPECIFICATIONS
CONSTRUCTION NOTES:
1. SEE PERMEABLE/PERVIOUS PAVER SPECIFICATIONS FOR
WEARING COURSE, PAVEMENT BASE, SUBGRADE, AND OTHER
REQUIREMENTS FOR PERMEABLE PERVIOUS PAVER FACILITIES.
2. MINIMUM UTILITY SETBACKS AND PROTECTION MEASURES MUST
CONFORM TO CURRENT SMC ASSET PROTECTION STANDARDS,
AND/OR CHAPTER 3 OF SMCWPPP GI DESIGN GUIDE AND OTHER
UTILITY PROVIDER REQUIREMENTS. COORDINATE WITH
ENGINEER IN THE EVENT OF UTILITY CROSSINGS AND UTILITY
CONFLICTS.
SUBGRADE, SCARIFIED
AND COMPACTED PER
SPECIFICATIONS
C
D
A
B
A
B
PERMEABLE/PERVIOUS PAVER
(SEE SPECIFICATION 33 14 43)
PAVEMENT
BASE
C"B"A"
D"
PERMEABLE/PERVIOUS PAVERS 1
PERVIOUS PAVEMENTGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
2.1
PP
FILE NO.
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PP
4.1
PP
3.1
PP
2.1
PP
1.3
PP
1.2
PP
1.1
A
B
MODERATE
VEHICULAR
LIGHT
VEHICULAR PEDESTRIAN
LAYER MATERIAL TYPE*GOOD
SOILS**
POOR
SOILS**
GOOD
SOILS**
POOR
SOILS**
GOOD
SOILS**
POOR
SOILS**
PERVIOUS CONCRETE 9 9.5 6.5 7 4.5 5
BASE COURSE
ASTM NO. 3 OR 57 OR
CALTRANS CLASS 1 TYPE
PERMEABLE
6 6 6 6 6 6
OPTIONAL RESERVOIR
COURSE
ASTM NO. 2, 3, OR 57
- - - - - -
* MATERIAL FINER THAN NO. 100 SIEVE SHALL NOT EXCEED 2 PERCENT FOR ANY AGGREGATE LAYER
(LICENSED PROFESSIONAL TO SELECT AGGREGATE).
** "GOOD" AND "POOR" SOIL CLASSIFICATIONS BASED ON AASHTO GUIDE FOR DESIGN OF PAVEMENT
STRUCTURES. SEE DESIGNER NOTES FOR SUBGRADE ASSUMPTIONS. (LICENSED PROFESSIONAL MUST
CALCULATE REQUIRED DEPTH BASED ON SITE CONDITIONS).
MINIMUM MATERIAL THICKNESS (IN):
A
B
PERVIOUS CONCRETE
(SEE SPECIFICATION 32 13 43)
OPTIONAL GEOTEXTILE FOR SOIL
SEPARATION, PER ENGINEER'S
RECOMMENDATION, SEE SPECIFICATIONS
SUBGRADE, SCARIFIED
AND COMPACTED
PER SPECIFICATIONS
C
C
CONSTRUCTION NOTES:
1. SEE PERVIOUS CONCRETE SPECIFICATIONS FOR WEARING
COURSE, PAVEMENT BASE, SUBGRADE, AND OTHER
REQUIREMENTS FOR PERVIOUS CONCRETE FACILITIES.
2. MINIMUM UTILITY SETBACKS AND PROTECTION MEASURES MUST
CONFORM TO CURRENT SMC ASSET PROTECTION STANDARDS,
AND/OR CHAPTER 3 OF SMCWPPP GI DESIGN GUIDE AND OTHER
UTILITY PROVIDER REQUIREMENTS. COORDINATE WITH ENGINEER
IN THE EVENT OF UTILITY CROSSINGS AND UTILITY CONFLICTS.
3. OPTIONAL RESERVOIR COURSE MAY BE NEEDED DEPENDING ON
CALCULATED WATER QUALITY DESIGN VOLUME STORAGE
REQUIREMENTS.
PAVEMENT
BASEC"
B"
A"
PERVIOUS CONCRETE 1
PERVIOUS PAVEMENTGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
3.1
PP
FILE NO.
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PP
4.1
PP
3.1
PP
2.1
PP
1.3
PP
1.2
PP
1.1
SUBGRADE, SCARIFIED
AND COMPACTED
PER SPECIFICATIONS
A
B
C
MODERATE
VEHICULAR
LIGHT
VEHICULAR PEDESTRIAN
LAYER MATERIAL TYPE*GOOD
SOILS**
POOR
SOILS**
GOOD
SOILS**
POOR
SOILS**
GOOD
SOILS**
POOR
SOILS**
POROUS ASPHALT 6 8 4 4 3 4
BASE COURSE
ASTM NO. 57 OR CALTRANS
CLASS 1 TYPE PERMEABLE
6 6 5 4 6 4
RESERVOIR COURSE
ASTM NO. 2, 3, OR 57 10 19 - 11 -8
* MATERIAL FINER THAN NO. 100 SIEVE SHALL NOT EXCEED 2 PERCENT FOR ANY AGGREGATE LAYER
(LICENSED PROFESSIONAL TO SELECT AGGREGATE).
** "GOOD" AND "POOR" SOIL CLASSIFICATIONS BASED ON AASHTO GUIDE FOR DESIGN OF PAVEMENT
STRUCTURES. SEE DESIGNER NOTES FOR SUBGRADE ASSUMPTIONS. (LICENSED PROFESSIONAL MUST
CALCULATE REQUIRED DEPTH BASED ON SITE CONDITIONS).
MINIMUM MATERIAL THICKNESS (IN):
A
B
C
POROUS ASPHALT WEARING COURSE
(SEE SPECIFICATION 32 12 43)
OPTIONAL GEOTEXTILE FOR SOIL
SEPARATION, PER ENGINEER'S
RECOMMENDATION, SEE SPECIFICATIONS
PAVEMENT
BASE
CONSTRUCTION NOTES:
1. SEE POROUS ASPHALT SPECIFICATIONS FOR WEARING COURSE,
PAVEMENT BASE, SUBGRADE, AND OTHER REQUIREMENTS FOR
POROUS ASPHALT FACILITIES.
2. MINIMUM UTILITY SETBACKS AND PROTECTION MEASURES MUST
CONFORM TO CURRENT SMC ASSET PROTECTION STANDARDS,
AND/OR CHAPTER 3 OF SMCWPPP GI DESIGN GUIDE AND OTHER
UTILITY PROVIDER REQUIREMENTS. COORDINATE WITH
ENGINEER IN THE EVENT OF UTILITY CROSSINGS AND UTILITY
CONFLICTS.
C"
B"
A"
POROUS ASPHALT 1
PERVIOUS PAVEMENTGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
4.1
PP
FILE NO.
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PP
4.1
PP
3.1
PP
2.1
PP
1.3
PP
1.2
PP
1.1
PAVEMENT COMPONENTSGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
1.1
PC
FILE NO.
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PURPOSE:
EDGE TREATMENTS ARE USED TO STABILIZE THE EDGE OF THE PERVIOUS PAVEMENT AND CONTAIN WATER WITHIN THE
PERVIOUS PAVEMENT SECTION.
DESIGNER NOTES & GUIDELINES:
1. THE DESIGNER MUST ADAPT PLAN AND SECTION DRAWINGS TO ADDRESS SITE-SPECIFIC CONDITIONS.
2. ALL EDGE TREATMENT SYSTEMS MUST BE DESIGNED BY A LICENSED ENGINEER BASED ON SITE SPECIFIC CONDITIONS.
3. MINIMUM EDGE TREATMENT EMBEDMENT KEY DEPTHS ARE SPECIFIED TO PREVENT LATERAL SEEPAGE UNDER THE EDGE
TREATMENT AND INTO ADJACENT PAVEMENT SECTIONS. DEEPER EMBEDMENT MAY BE REQUIRED UNDER SOME
CONDITIONS.
4. FOR DEEP PAVEMENT SECTIONS, EDGE TREATMENT NOT REQUIRED TO EXTEND MORE THAN 12 INCHES BELOW WEARING
COURSE PROVIDED REQUIREMENTS AT INTERFACE WITH IMPERMEABLE PAVEMENTS ARE SATISFIED.
5. USE THE EDGE TREATMENT KEY MAP ON PC 1.2 TO IDENTIFY WHERE EACH TYPE OF EDGE TREATMENT IS REQUIRED OR
ALLOWED.
DESIGNER CHECKLIST (MUST SPECIFY, AS APPLICABLE):
EDGE TREATMENT TYPE AND MATERIAL
EDGE TREATMENT WIDTH AND HEIGHT
EMBEDMENT KEY DEPTH IF DIFFERENT THAN THE PROVIDED MINIMUMS
PC
1.5
PC
1.4
PC
1.3
PC
1.2
PC
1.1
PC
1.6
PC
2.2
PC
2.1
PC
3.2
PC
3.1
PC
3.3
PC
3.4
SECTIONS:
EDGE TREATMENT WITHIN ROADWAY 1 / PC 1.3
EDGE TREATMENT AT CURB 2, 3, 4 / PC 1.3
EDGE TREATMENT AT BACK OF CURB 1 / PC 1.4
EDGE TREATMENT AT EXISTING SIDEWALK 2 / PC 1.4
EDGE TREATMENT AT NEW SIDEWALK 3 / PC 1.4
EDGE TREATMENT AT LANDSCAPING 1, 2 / PC 1.5
EDGE TREATMENT AT LANDSCAPING 4 / PC 1.4
COUNTY OF SAN MATEO
STD PAVEMENT SECTION
PERVIOUS PAVEMENT
PARKING LANE
CURB & GUTTER (TYP)
PLANTERPEDESTRIAN
APPLICATIONS
VEHICULAR
APPLICATIONS
COURTESY ZONE
SIDEWALK
THROUGHWAY
ACCESSIBLE
PATH
WIDTH VARIES
SEE DESIGNER NOTES
A
B
C
D
E
G
F
PAVEMENT COMPONENTSGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
1.2
PC
FILE NO.
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PC
1.5
PC
1.4
PC
1.3
PC
1.2
PC
1.1
PC
1.6
PC
2.2
PC
2.1
PC
3.2
PC
3.1
PC
3.3
PC
3.4
DEEPENED STANDARD CURB 2CONCRETE BAND WITHIN PAVED AREA 1
DEEPENED STANDARD CURB AND GUTTER 3 IMPERMEABLE LINER AT STANDARD CURB AND GUTTER 4
SIDEWALK / PLANTING STRIP
CONCRETE CURB PER
SMC DPW STD D-3
SEE PERVIOUS
PAVEMENT SECTION
EXTEND TO BOTTOM OF
PAVEMENT BASE, SEE
DESIGNER NOTES
SEE PERVIOUS
PAVEMENT SECTION
IMPERMEABLE PAVEMENT
6"
2" (MIN) EMBEDMENT KEY
FROM ADJACENT IMPERMEABLE
PAVEMENT BASE
CONCRETE BAND
SEE PERVIOUS
PAVEMENT SECTION
SIDEWALK / PLANTING STRIP
CONCRETE CURB & GUTTER PER
SMC DPW STD D-3
SIDEWALK / PLANTING STRIP
EXTEND TO BOTTOM
OF PAVEMENT BASE,
SEE DESIGNER NOTES
30 MIL LINER,
SEE NOTE 1 1
1
CONCRETE CURB & GUTTER PER SMC DPW STD D-3
TRIM LINER 1" BELOW ADJACENT SURFACE
PRIOR TO PLACEMENT OF PERVIOUS
PAVEMENT WEARING COURSE
SEE PERVIOUS
PAVEMENT SECTION
CONSTRUCTION NOTES:
1. LINER SHALL BE HDPE CONFORMING TO GEOSYNTHETIC RESEARCH
INSTITUTE (GRI) GM13 OR LLDPE CONFORMING TO GRI GM 17.
EXTEND TO BOTTOM
OF PAVEMENT BASE,
SEE DESIGNER NOTES 6"
ANGLE OF REPOSE PER
GEOTECHNICAL ENGINEER'S
RECOMMENDATIONS
FLUSH EDGES
EXTEND TO BOTTOM OF PAVEMENT
BASE, SEE DESIGNER NOTES
CONCRETE BAND AT LANDSCAPE 5
SEE PERVIOUS
PAVEMENT SECTION
6"
CONCRETE BAND DEPRESS LANDSCAPING
NEXT TO EDGE TREATMENT
LANDSCAPE
EXTEND TO BOTTOM
OF PAVEMENT BASE,
SEE DESIGNER NOTES
PAVEMENT COMPONENTSGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
1.3
PC
FILE NO.
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PC
1.5
PC
1.4
PC
1.3
PC
1.2
PC
1.1
PC
1.6
PC
2.2
PC
2.1
PC
3.2
PC
3.1
PC
3.3
PC
3.4
SIDEWALK
DEEPENED STANDARD CURB / CURB AND GUTTER 1 IMPERMEABLE LINER AT EXISTING SIDEWALK 2
THICKENED EDGE AT NEW SIDEWALK 3
SEE PERVIOUS
PAVEMENT SECTION
IMPERMEABLE
PAVEMENT
TRIM LINER 1" BELOW ADJACENT SURFACE
PRIOR TO PLACEMENT OF PERVIOUS PAVEMENT
WEARING COURSE
30 MIL LINER,
SEE NOTE 1EXTEND TO BOTTOM
OF PAVEMENT BASE,
SEE DESIGNER NOTES
CONCRETE CURB PER SMC DPW STD D-3
SEE PERVIOUS
PAVEMENT SECTION
SIDEWALK
EXTEND TO BOTTOM OF PAVEMENT
BASE, SEE DESIGNER NOTES
SEE PERVIOUS
PAVEMENT SECTION1
1
6"
1
1
FLUSH EDGES
FLUSH EDGES
CONCRETE BAND AT LANDSCAPE 4
SEE PERVIOUS
PAVEMENT SECTION
4" (MIN)DEPRESS LANDSCAPING
NEXT TO EDGE TREATMENT
LANDSCAPE
CONCRETE BAND EXTEND TO BOTTOM OF PAVEMENT
BASE, SEE DESIGNER NOTES
CONSTRUCTION NOTES:
1. LINER SHALL BE HDPE CONFORMING TO GEOSYNTHETIC RESEARCH INSTITUTE (GRI) GM13 OR
LLDPE CONFORMING TO GRI GM 17.
2" (MIN) EMBEDMENT KEY
FROM ADJACENT
IMPERMEABLE PAVEMENT BASE
EXTEND TO BOTTOM
OF PAVEMENT BASE,
SEE DESIGNER NOTES
PAVEMENT COMPONENTSGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
1.4
PC
FILE NO.
PC
1.5
PC
1.4
PC
1.3
PC
1.2
PC
1.1
PC
1.6
PC
2.2
PC
2.1
PC
3.2
PC
3.1
PC
3.3
PC
3.4
MORTARED PAVER AT LANDSCAPING 1
METAL PAVER EDGE AT LANDSCAPING 2
LANDSCAPING
1 - 2 ROWS OF PAVERS
OVER CONCRETE BASE
CONCRETE BASE W/ #4 BAR
SEE PERMEABLE
PAVER SECTION
THIN SET MORTAR
SEE PERMEABLE
PAVER SECTION LANDSCAPE
TRAFFIC RATED METAL EDGE
RESTRAINT, SEE NOTE 1 10" LONG x 3/8" DIA GALVANIZED STEEL LANDSCAPE
SPIKE SPACED EVERY 2' FOR STRAIGHT SECTIONS
AND EVERY 1' FOR CURVED SECTIONS
EXTEND BASE 6" MIN BEYOND EDGE OF PAVER
OR PER MANUFACTURER'S RECOMMENDATIONS
EXTEND TO BOTTOM OF
PAVEMENT BASE, SEE
DESIGNER NOTES 4" - 8", MATCH PAVER WIDTH
OPTIONAL GEOGRID BETWEEN LEVELING AND
BASE COURSE TIED TO EDGE RESTRAINT PER
ENGINEER'S RECOMMENDATION
FLUSH EDGESDEPRESS LANDSCAPING
NEXT TO EDGE TREATMENT
DEPRESS LANDSCAPING
NEXT TO EDGE TREATMENT
CONSTRUCTION NOTES:
1. COORDINATE WITH SAN MATEO COUNTY DEPARTMENT OF PUBLIC
WORKS IF STEEL IS REQUIRED IN RIGHT OF WAY.
PAVEMENT COMPONENTSGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
1.5
PC
FILE NO.
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PC
1.5
PC
1.4
PC
1.3
PC
1.2
PC
1.1
PC
1.6
PC
2.2
PC
2.1
PC
3.2
PC
3.1
PC
3.3
PC
3.4
VEHICULAR APPLICATIONS 1
SEE PERMEABLE
PAVER SECTION
GRATE AND
FRAME / LID
CONCRETE COLLAR
CONCRETE
MANHOLE /
VAULT /
CATCH BASIN
#3 REBAR, 2" (MIN)
COVER, ALL SIDES
PEDESTRIAN APPLICATIONS 2
SEE PERMEABLE
PAVER SECTION
GRATE AND FRAME / LID
PAVERS TO
EDGE OF FRAME
CONCRETE MANHOLE /
VAULT / CATCH BASIN
SECTION B
GEOTEXTILE, 12" WIDE,
TURN UP AGAINST COLLAR
PERMEABLE PAVER8" (MIN)
PERMEABLE PAVER EDGE AT STRUCTURE -PERMEABLE PAVER EDGE AT STRUCTURE -
STEEL FRAME WITH NOTCH
TO MATCH PAVER DEPTH
SECTION A
SET TOP OF PAVER FLUSH
WITH SURFACE OF COLLAR
CONCRETE COLLAR, SLOPE TO MATCH
ADJACENT SURFACE, ALL SIDES
8" (MIN)
A-
CONCRETE COLLAR, SLOPE TO MATCH
ADJACENT SURFACE, ALL SIDES
8" (MIN)
A-
PLAN - SQUARE FRAME PLAN - ROUND FRAME
SQUARE FRAME ROUND FRAME
ISOMETRIC - SQUARE FRAME
SET TOP OF PAVER FLUSH
WITH SURFACE OF FRAME
PAVEMENT COMPONENTSGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
1.6
PC
FILE NO.
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PC
1.5
PC
1.4
PC
1.3
PC
1.2
PC
1.1
PC
1.6
PC
2.2
PC
2.1
PC
3.2
PC
3.1
PC
3.3
PC
3.4
DDOWNSLOPE
LSPACING
DAVERAGE
SSUBSURFACEDUPSLOPE
PAVEMENT COMPONENTSGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
2.1
PC
FILE NO.
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PURPOSE:
PERVIOUS PAVEMENT FACILITIES MUST BE DESIGNED TO PROVIDE SUBSURFACE STORAGE OF
STORMWATER TO ALLOW TIME FOR THE WATER TO INFILTRATE INTO THE UNDERLYING SOIL. SLOPED
FACILITIES ON POOR SOILS HAVE AN INCREASED POTENTIAL FOR LATERAL FLOWS THROUGH THE
STORAGE RESERVOIR COURSE ALONG THE TOP OF THE RELATIVELY IMPERMEABLE SUBGRADE SOIL.
THIS REDUCES THE STORAGE AND INFILTRATION CAPACITY OF THE PAVEMENT SYSTEM. SUBSURFACE
DETENTION STRUCTURES, OR CHECK DAMS, CAN BE INCORPORATED INTO THE SUBGRADE AND
ALIGNED PERPENDICULAR TO THE LONGITUDINAL SUBGRADE SLOPE TO CREATE PONDING IN THE
AGGREGATE STORAGE RESERVOIR COURSE TO DETAIN SUBSURFACE FLOW, INCREASE INFILTRATION,
AND REDUCE STRUCTURAL PROBLEMS ASSOCIATED WITH SUBGRADE EROSION ON SLOPES.
DESIGNER NOTES & GUIDELINES:
1. THE DESIGNER MUST ADAPT SECTION DRAWINGS TO ADDRESS SITE-SPECIFIC CONDITIONS.
2. WHILE THE DESIGNER MUST DETERMINE IF CHECK DAMS ARE NECESSARY BASED ON SITE-SPECIFIC
CONDITIONS, SOME GENERAL GUIDELINES ARE PROVIDED BELOW:
3. THE DESIGNER MUST ESTABLISH THE HEIGHT AND SPACING OF THE CHECK DAMS BASED ON THE
SUBGRADE SLOPE AND THE STORAGE DEPTH REQUIRED TO MEET PROJECT HYDROLOGIC
PERFORMANCE GOALS. THE AVERAGE DEPTH OF SUBSURFACE STORAGE ACROSS THE FACILITY
AREA MUST MEET THE REQUIRED STORAGE DEPTH. REFER TO CHECK DAM SPACING GUIDANCE ON
THIS DRAWING FOR CHECK DAM SPACING CALCULATIONS.
4. MAXIMUM CHECK DAM HEIGHT IS GOVERNED BY 48 HOUR DRAWDOWN REQUIREMENT AND NATIVE
SOIL INFILTRATION RATE. SEE PP 1.1 FOR ADDITIONAL GUIDANCE.
5. THE AREA OF SUBBASE COVERED BY IMPERMEABLE CHECK DAM MATERIAL SHOULD BE EXCLUDED
FROM HYDROLOGIC PERFORMANCE CALCULATIONS WHEN THE AREA IS SIGNIFICANT (GREATER
THAN 10 PERCENT) RELATIVE TO THE PAVEMENT AREA.
6. THE DESIGNER MUST ENSURE THAT THE RESERVOIR COURSE DEPTH IS SUFFICIENT TO
ACCOMMODATE THE HEIGHT OF THE CHECK DAMS WITH THE REQUIRED MINIMUM CLEARANCE.
7. CONVEYANCE CALCULATIONS ARE REQUIRED TO EVALUATE THE NEED FOR SUBSURFACE OUTLETS
(E.G., PERFORATED UNDERDRAIN PIPES SET AT THE DESIGN SUBSURFACE PONDING DEPTH) AND
DOWNSLOPE OVERFLOW SYSTEM. REFER TO PC 3.1.
8. LOCATE CHECK DAMS TO MINIMIZE IMPACT TO UTILITY ACCESS.
9. LOCATE PERVIOUS CONCRETE CONTROL JOINTS AT CHECK DAM LOCATIONS WHEN CHECK DAM
EXTENDS INTO THE STRUCTURAL PAVEMENT SECTION.
SUBGRADE SOILS SUBGRADE SLOPE RUNON FROM
OTHER AREAS
CHECK DAM
REQUIRED
TYPE A/B ANY ALLOWED NO
≤ 2%NOT ALLOWED NO
TYPE C/D ≤ 2%ALLOWED NO*
> 2%ALLOWED YES
* RECOMMENDED FOR SUBSURFACE FLOW PATHS OVER 50 FEET
CHECK DAM SPACING GUIDANCE:
TYPICAL MAXIMUM SPACING, LSPACING, MAX (FEET) :
LSPACING, MAX = DDOWNSLOPE ÷ SSUBSURFACE
DDOWNSLOPE = DOWNSLOPE STORAGE DEPTH (I.E. CHECK DAM HEIGHT) (FEET)
SSUBSURFACE = SUBSURFACE SLOPE (FT/FT)
SPACING, LSPACING (WHEN LSPACING ≤LSPACING, MAX):
DESIGNER CHECKLIST (MUST SPECIFY, AS APPLICABLE):
CHECK DAM TYPE AND MATERIAL
CHECK DAM ELEVATION, HEIGHT, AND WIDTH
CHECK DAM SPACING
CHECK DAM CLEARANCE (MEASURED FROM BOTTOM OF WEARING COURSE)
LSPACING = 2 (DAVERAGE -DDOWNSLOPE)
- SSUBSURFACE
DAVERAGE = AVERAGE STORAGE DEPTH (FEET)
PC
1.5
PC
1.4
PC
1.3
PC
1.2
PC
1.1
PC
1.6
PC
2.2
PC
2.1
PC
3.2
PC
3.1
PC
3.3
PC
3.4
CONTROLLED DENSITY FILL SUBSURFACE CHECK DAM 1 IMPERMEABLE LINER SUBSURFACE CHECK DAM 2
CONCRETE BAND SUBSURFACE CHECK DAM 3
SEE PERVIOUS
PAVEMENT SECTION
CONTROLLED DENSITY
FILL SUBSURFACE
CHECK DAM (TYP)
DESIGNER TO SPECIFY
SUBSURFACE
CHECK DAM HEIGHT
2" (MIN) CHECK DAM CLEARANCE,
DESIGNER TO SPECIFY
3" (MIN) KEY
1' (MIN)
DESIGNER
TO SPECIFY
DESIGNER TO SPECIFY
SPACING, SEE PC 2.1
FOR GUIDANCE
SEE PERVIOUS
PAVEMENT SECTION
30 MIL LINER
(TYP), SEE NOTE 2
DESIGNER TO SPECIFY
SUBSURFACE
CHECK DAM HEIGHT
1' (MIN)
DESIGNER
TO SPECIFY
DESIGNER TO SPECIFY
SPACING, SEE PC 2.1
FOR GUIDANCE
SEE PERVIOUS
PAVEMENT SECTION
CONCRETE BAND
SUBSURFACE CHECK DAM
DESIGNER TO SPECIFY
SUBSURFACE CHECK
DAM HEIGHT
DESIGNER TO SPECIFY
SPACING, SEE PC 2.1
FOR GUIDANCE
4"
(MIN)
3" (MIN) KEY
DESIGN WATER
SURFACE ELEVATION
DESIGN WATER
SURFACE
ELEVATION
DESIGN WATER
SURFACE ELEVATION
EXTEND AS NEEDED TO
SECURE DURING
CONSTRUCTION
CONSTRUCTION NOTES:
1. ALL MATERIAL AND WORKMANSHIP FOR CHECK DAMS SHALL CONFORM
TO SMC DPW STANDARD SPECIFICATIONS AND APPLICABLE CODES.
2. LINER SHALL BE HDPE CONFORMING TO GEOSYNTHETIC RESEARCH
INSTITUTE (GRI) GM13 OR LLDPE CONFORMING TO GRI GM 17.
SLOPE
SLOPE
SLOPE
3" (MIN)
KEY
2" (MIN) CHECK DAM CLEARANCE,
DESIGNER TO SPECIFY
2" (MIN) CHECK DAM CLEARANCE,
DESIGNER TO SPECIFY
CONTROL JOINT (TYP)
(PERVIOUS CONCRETE ONLY),
DESIGNER TO SPECIFY
CONTROL JOINT (TYP)
(PERVIOUS CONCRETE ONLY),
DESIGNER TO SPECIFY
PAVEMENT COMPONENTSGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
2.2
PC
FILE NO.
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PC
1.5
PC
1.4
PC
1.3
PC
1.2
PC
1.1
PC
1.6
PC
2.2
PC
2.1
PC
3.2
PC
3.1
PC
3.3
PC
3.4
PAVEMENT COMPONENTSGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
3.1
PC
FILE NO.
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PURPOSE:
PERVIOUS PAVEMENT SUBSURFACE OVERFLOWS AND/OR UNDERDRAINS ARE DESIGNED TO CONVEY EXCESS
FLOW TO AN APPROVED DISCHARGE POINT. FOR SUBSURFACE OVERFLOW CONFIGURATIONS, THE OVERFLOW
RISER ELEVATION IS SET AT THE MAXIMUM DESIGN PONDING DEPTH IN THE PAVEMENT BASE. FOR SUBSURFACE
UNDERDRAIN CONFIGURATIONS, THE CHECK DAM IS SET AT THE MAXIMUM DESIGN PONDING DEPTH IN THE
PAVEMENT BASE, AND THE UNDERDRAIN IS LOCATED IN AN UNDERDRAIN TRENCH. WATER BELOW THE OVERFLOW
RISER OR CHECK DAM ELEVATION IS TEMPORARILY STORED AND INFILTRATED INTO THE UNDERLYING SUBGRADE.
UNDERDRAINS ARE ONLY RECOMMENDED WHEN AN AVAILABLE DAYLIGHT CONDITION EXISTS.
DESIGNER NOTES & GUIDELINES:
1. DESIGNERS MUST ADAPT DRAWINGS TO ADDRESS SITE-SPECIFIC CONDITIONS.
2. OVERFLOW / UNDERDRAIN PIPES MUST BE LOCATED AT AN ELEVATION HIGHER THAN THE STORM DRAIN MAIN
HYDRAULIC GRADE LINE TO PREVENT BACK FLOW INTO THE PAVEMENT SECTION.
3. OVERFLOW IS TYPICALLY PROVIDED BY A SUBSURFACE SLOTTED OVERFLOW PIPE(S) WITH DOWNSTREAM
OUTLET CONTROL OR UPSTREAM CHECK DAMS SET AT THE DESIGN PONDING ELEVATION.
4. EMERGENCY OVERFLOW FOR LARGE STORM EVENTS CAN BE PROVIDED BY SURFACE SHEET FLOW UPON
INUNDATION OF THE PAVEMENT SECTION (REQUIRES SURFACE CONVEYANCE SYSTEM OR OTHER RUNOFF
COLLECTION METHOD).
5. THE DESIGNER MUST CONSIDER THE FLOW PATH OF WATER WHEN THE PERVIOUS PAVEMENT SECTION IS
FULLY SATURATED TO THE MAXIMUM DESIGN DEPTH TO CONFIRM THERE ARE NO UNANTICIPATED DISCHARGE
LOCATIONS (E.G., INTERSECTING UTILITY TRENCHES) AND TO ENSURE THE DESIGN PROVIDES EMERGENCY
OVERFLOW CONVEYANCE TO AN APPROVED DISCHARGE POINT.
6. CONVEYANCE CALCULATIONS ARE REQUIRED TO DESIGN THE OVERFLOW / UNDERDRAIN PIPE DIAMETER AND
PIPE SPACING TO SATISFY SMC HYDRAULIC REQUIREMENTS.
7. IF SITE CONSTRAINTS NECESSITATE USE OF OVERFLOW PIPE IN AN AREA SUBJECT TO VEHICULAR TRAFFIC OR
OTHER LOADING, APPROPRIATE COVER DEPTH AND PIPE MATERIAL MUST BE DESIGNED.
8. WEARING COURSE MAY BE USED TO FULFILL MINIMUM COVER REQUIREMENTS PROVIDED WEARING COURSE
IS RIGID PAVEMENT.
9. OPTIONAL OBSERVATION PORTS CAN BE USED TO DETERMINE WHETHER AN OVERFLOW / UNDERDRAIN IS
DEWATERING PROPERLY. REFER TO GC 4.1- GC 4.3.
10. OVERFLOW / UNDERDRAIN PIPES MUST BE EQUIPPED WITH CLEANOUTS. REFER TO GC 5.1.
11. INSTALL OVERFLOW PIPES AT DOWNGRADIENT END OF PAVEMENT. OVERFLOWS NOT REQUIRED AT EACH
CHECK DAM LOCATION.
12. PIPE MATERIAL SHALL BE DESIGNED PER SAN MATEO COUNTY CODE (CHAPTER X, SECTION X).
13. AN OUTLET ORIFICE CONTROL DEVISE MAY BE INSTALLED TO FURTHER DETAIN OUTFLOW AND MAXIMIZE
INFILTRATION. ENGINEER SHALL DESIGN, DETAIL, SPECIFY, AND CONDUCT SUPPLEMENTAL PERFORMANCE
CALCULATIONS AS NEEDED.
DESIGNER CHECKLIST (MUST SPECIFY, AS APPLICABLE):
OVERFLOW / UNDERDRAIN PIPE MATERIAL, DIAMETER, AND COVER DEPTH
OVERFLOW / UNDERDRAIN PIPE INVERT ELEVATION AND SLOPE
OVERFLOW / UNDERDRAIN PIPE ALIGNMENT AND DISCHARGE LOCATION
PC
1.5
PC
1.4
PC
1.3
PC
1.2
PC
1.1
PC
1.6
PC
2.2
PC
2.1
PC
3.2
PC
3.1
PC
3.3
PC
3.4
CONSTRUCTION NOTES:
1. ALL MATERIAL AND WORKMANSHIP FOR
UNDERDRAIN STRUCTURES SHALL CONFORM TO
SMC DPW STANDARD SPECIFICATIONS AND
APPLICABLE CODES.
2. LOCATE UNDERDRAIN PIPE BELOW STRUCTURAL
PAVEMENT BASE DEPTH.
3. UNDERDRAIN PIPE BEDDING SHALL BE ASTM NO.
57 CONFORMING TO THE REQUIREMENTS OF
GRAVEL BASE MATERIAL FOR PAVEMENTS,
UNLESS OTHERWISE SPECIFIED.
OVERFLOW CONTROL STRUCTURE WITH RISER 1
CLEANOUT,
SEE A-
UNDERDRAIN PIPE TRENCH SECTION A
1
1
6"
GC
5.1
OPTIONAL GEOTEXTILE
FOR SOIL SEPARATION
1
1
OUTFLOW
PC
3.4
4" DIA (MIN) SLOTTED
UNDERDRAIN PIPE,
DESIGNER TO SPECIFY
DIAMETER, SEE
WATER LEVEL CONTROLLED BY
RISER OUTLET ELEVATION
SEE PERVIOUS
PAVEMENT
SECTION UPTURNED ELBOW WITH
OPTIONAL RISER PIPE
RISER OUTLET
ELEVATION,
DESIGNER TO SPECIFY
PROFILE
WATER LEVEL
CONTROLLED BY
OUTLET ELEVATION
PC
2.2
CONTROLLED DENSITY FILL
SUBSURFACE CHECK DAM,
SEE
UNDERDRAIN
PIPE BEDDING UNDERDRAIN
PIPE BEDDING
EDGE
TREATMENT,
FOR OPTIONS
SEE -PC
1.1
PC
1.6
SEE PERVIOUS
PAVEMENT
SECTION
UNDERDRAIN
PIPE BEDDING
2" (MIN) ALL SIDES
OUTLET
STRUCTURE
12" (MIN) COVER, SEE NOTE 2
DESIGNER TO SPECIFY
12" (MIN) COVER, SEE NOTE 2
DESIGNER TO SPECIFY
12" (MIN) COVER, SEE NOTE 2
DESIGNER TO SPECIFY
WATER LEVEL
CONTROLLED BY
OUTLET ELEVATION
WATER LEVEL
CONTROLLED BY
OUTLET ELEVATION
SEE PERVIOUS
PAVEMENT
SECTION
SEE PERVIOUS
PAVEMENT
SECTION
2" (MIN)
ALL SIDES
SLOTTED
UNDERDRAIN
PIPE
2" (MIN) ALL SIDES
OPTIONAL GEOTEXTILE
FOR SOIL SEPARATION
ALTERNATIVE 1 ALTERNATIVE 2 ALTERNATIVE 3
UNDERDRAIN PIPE
BEDDING, SEE NOTE 3
2" (MIN)
1
1 SLOTTED
UNDERDRAIN
PIPE
IMPERMEABLE LINER
SUBSURFACE CHECK
DAM, SEE PC
2.2
OPTIONAL
GEOTEXTILE FOR
SOIL SEPARATION
SLOTTED
UNDERDRAIN
PIPE
PAVEMENT COMPONENTSGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
3.2
PC
FILE NO.
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PC
1.5
PC
1.4
PC
1.3
PC
1.2
PC
1.1
PC
1.6
PC
2.2
PC
2.1
PC
3.2
PC
3.1
PC
3.3
PC
3.4
CHECK DAM-CONTROLLED WITH UNDERDRAIN A
18" (MIN)
12" (MIN) COVER, SEE NOTE 2
SEE PERVIOUS
PAVEMENT SECTION
DOWNSLOPE END OF
PERVIOUS PAVEMENT
OPTIONAL GEOTEXTILE FOR
SOIL SEPARATION (TYP)
PC
2.2
SUBSURFACE
CHECK DAM (TYP), SEE
1
1
SLOPE
UNDERDRAIN PIPE
BEDDING, SEE NOTE 3
6"
PC
2.1
EDGE TREATMENT,
FOR OPTIONS SEE
4" (MIN) SLOTTED UNDERDRAIN PIPE,
DESIGNER TO SPECIFY DIAMETER,
SEE2" (MIN), ALL SIDES
-PC
1.1
PC
1.6
WATER LEVEL CONTROLLED BY
CHECK DAM ELEVATION
DESIGNER TO SPECIFY
CONSTRUCTION NOTES:
1. ALL MATERIAL AND WORKMANSHIP FOR
OVERFLOW STRUCTURES SHALL CONFORM TO
SMC DPW STANDARD SPECIFICATIONS AND
APPLICABLE CODES.
2. LOCATE UNDERDRAIN PIPE BELOW STRUCTURAL
PAVEMENT BASE DEPTH.
3. UNDERDRAIN PIPE BEDDING SHALL BE ASTM NO.
57 CONFORMING TO THE REQUIREMENTS OF
GRAVEL BASE MATERIAL FOR PAVEMENTS,
UNLESS OTHERWISE SPECIFIED.
UNDERDRAIN TO DAYLIGHT 1
CLEANOUT,
SEE A-
GC
5.1
OUTFLOW
PC
3.4
4" DIA (MIN) SLOTTED
UNDERDRAIN PIPE,
DESIGNER TO SPECIFY
DIAMETER, SEE
SEE PERVIOUS
PAVEMENT
SECTION
UNDERDRAIN OUTLET
ELEVATION,
DESIGNER TO SPECIFY
PROFILE
OUTLET STRUCTURE
(OR TO DAYLIGHT,
OR SWALE, etc.)
UNDERDRAIN PIPE
BEDDING, SEE NOTE 3
PC
2.2
CONTROLLED DENSITY FILL
SUBSURFACE CHECK DAM, SEE
PC
3.4
PAVEMENT COMPONENTSGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
3.3
PC
FILE NO.
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PC
1.5
PC
1.4
PC
1.3
PC
1.2
PC
1.1
PC
1.6
PC
2.2
PC
2.1
PC
3.2
PC
3.1
PC
3.3
PC
3.4
SLOTTED UNDERDRAIN PIPE 1
120° TYP
4" DIA (MIN) SLOTTED
HDPE SDR 17 PIPE OR
EQUAL
CENTERLINE OF
SLOT LOCATION (TYP)
CONSTRUCTION NOTES:
1. UNDERDRAIN PIPE SHALL BE SLOTTED HDPE SDR 17
(PREFERRED), PERFORATED PIPE HDPE SDR 17, OR
ACCEPTABLE SUBSTITUTE MATERIAL PER ENGINEERS
SPECIFICATION. SINGLE WALL AND DUAL WALL CORRUGATED
HDPE PIPE (AASHTO M252 AND M294 TYPES C, S, AND D) ARE
NOT ACCEPTABLE.
2. ALL PERFORATIONS SHALL BE SLOTTED TYPE, MEASURING
0.032 INCH WIDE (MAX), SPACED AT 0.25 INCH (MIN), AND
PROVIDING A MINIMUM INLET AREA OF 5.0 SQUARE INCH PER
LINEAR FOOT OF PIPE.
3. PERFORATIONS SHALL BE ORIENTED PERPENDICULAR TO
LONG AXIS OF PIPE, AND EVENLY SPACED AROUND
CIRCUMFERENCE AND LENGTH OF PIPE.
SLOT (TYP),
SEE NOTES 2 AND 3
PAVEMENT COMPONENTSGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
3.4
PC
FILE NO.
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PC
1.5
PC
1.4
PC
1.3
PC
1.2
PC
1.1
PC
1.6
PC
2.2
PC
2.1
PC
3.2
PC
3.1
PC
3.3
PC
3.4
BP
1.1
BP
1.2
BP
2.1
BP
2.2
BP
3.1
BP
3.2
BP
4.1
BP
4.2
BP
5.1
BP
5.3
BP
5.5
BP
5.6
BP
5.2
BP
4.3
BP
4.4
BP
4.5
BP
4.6
BP
3.3
BP
3.4
BP
5.7
BP
5.4
BIORETENTION PLANTERGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
1.1
BP
FILE NO.
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PURPOSE:
BIORETENTION PLANTERS CAPTURE AND TREAT STORMWATER RUNOFF VIA SURFACE AND SUBSURFACE STORAGE, FILTRATION
THROUGH BIOTREATMENT SOIL, AND INFILTRATION INTO NATIVE SOIL WHERE FEASIBLE. BIORETENTION PLANTERS MAY ALSO BE
REFERRED TO AS STORMWATER PLANTERS OR STORMWATER CURB EXTENSIONS AND INCLUDE 3 TYPES OF PLANTERS: BIOINFILTRATION
(UNLINED, NO UNDERDRAIN), BIORETENTION (UNDER-DRAINED) AND FLOW-THROUGH (LINED WITH UNDERDRAIN). ALL TYPES TYPICALLY
HAVE VERTICAL SIDE WALLS IN ORDER TO MAXIMIZE WATER STORAGE VOLUME IN CONSTRAINED SITES.
DESIGNER NOTES & GUIDELINES:
1. THE DESIGNER MUST ADAPT PLAN AND SECTION DRAWINGS TO ADDRESS SITE-SPECIFIC CONDITIONS.
2. PLANTER AREA, PONDING DEPTH, BIOTREATMENT SOIL DEPTH, AND AGGREGATE STORAGE DEPTH MUST BE SIZED TO MEET PROJECT
HYDROLOGIC PERFORMANCE GOALS.
3. FACILITY DRAWDOWN TIME (i.e., TIME FOR SURFACE PONDING TO DRAIN THROUGH THE ENTIRE SECTION INCLUDING AGGREGATE
STORAGE AFTER THE END OF A STORM) REQUIREMENTS:
x 48 HOUR (PREFERRED), 72 HOUR MAXIMUM FACILITY DRAWDOWN (i.e. ORIFICE CONTROLLED SYSTEM OR EXTENDED STORAGE
DEPTH WITHIN INFILTRATION SYSTEM)
4. AN AGGREGATE COURSE IS REQUIRED UNDER THE BIOTREATMENT SOIL FOR BIORETENTION IN SEPARATE SEWER SYSTEM AREAS TO
PROVIDE ADDITIONAL TREATMENT. SEE GUIDANCE ON BC 4.1.
5. THE PLANTER WALL SLOPE IS TYPICALLY DESIGNED TO MATCH THE LONGITUDINAL SLOPE OF THE ADJACENT ROADWAY/SIDEWALK.
THE FACILITY SUBGRADE, HOWEVER, SHOULD BE FLAT. CHECK DAMS MAY BE USED TO TERRACE FACILITIES TO PROVIDE SUFFICIENT
PONDING FOR HIGHER-SLOPED INSTALLATIONS. DESIGNER MUST SPECIFY CHECK DAM HEIGHT AND SPACING. REFER TO BC 6.1 AND
BC 6.2 FOR GUIDANCE ON CHECK DAM DESIGN.
6. DEPENDING ON THE HEIGHT OF THE PROPOSED PLANTER WALL, ADDITIONAL STRUCTURAL CONSIDERATIONS MAY BE REQUIRED TO
ADDRESS WALL LOADING. REFER TO BC 1.1 THROUGH BC 1.12 FOR GUIDANCE ON EDGE TREATMENTS.
7. WHEN FACILITY CONSTRUCTION IMPACTS EXISTING SIDEWALK, ALL SAW CUTS MUST ADHERE TO SMC DPW REQUIREMENTS. SAW
CUTS SHOULD BE ALONG SCORE LINES AND ANY DISTURBED SIDEWALK FLAGS SHOULD BE REPLACED IN THEIR ENTIRETY.
8. PLANTERS IN PUBLIC RIGHT OF WAY SHALL BE DESIGNED WITH EMERGENCY OVERFLOW TO THE STREET IN THE EVENT THE PLANTER
OUTLET IS OBSTRUCTED OR CLOGGED.
9. UP TO TWO PLANTERS MAY BE CONNECTED IN SERIES, IN LIEU OF MULTIPLE INLETS, PROVIDED THE CONNECTION IS A TRENCH DRAIN
OR EQUAL SURFACE CONVEYANCE AND IS ADEQUATELY SIZED TO CONVEY FLOWS.
10. PLANTER VEGETATION MUST BE SPECIFIED BY DESIGN PROFESSIONAL PER C.3 TECHNICAL GUIDANCE MANUAL, APPENDIX A PLANT
LIST, AND SMCWPPP GI DESIGN GUIDE CHAPTER 4.
11. THE DESIGNER MUST EVALUATE UTILITY SURVEYS FOR POTENTIAL UTILITY CROSSINGS OR CONFLICTS. REFER TO GC 2.1 - GC 2.12
FOR UTILITY CROSSING DETAILS AND GC 3.1 - GC 3.3 FOR UTILITY CROSSING CONFLICT DETAILS.
12. MINIMUM UTILITY SETBACKS AND PROTECTION MEASURES MUST CONFORM TO CURRENT JURISDICTIONAL ASSET PROTECTION
STANDARDS. IN THE ABSENCE OF THESE STANDARDS, THE DESIGNER SHALL REFER TO CHAPTER 3 OF SMCWPPP GI DESIGN GUIDE
FOR BEST PRACTICES AND COORDINATE DIRECTLY WITH RELEVANT UTILITY PROVIDERS FOR REQUIREMENTS.
13. FREEBOARD REQUIREMENTS SHOWN SHOULD BE USED AS GUIDELINES BUT THE
DESIGNER SHALL REFER TO THE C.3 TECHNICAL GUIDANCE
MANUAL FOR ADDITIONAL FREEBOARD REQUIREMENTS,
ESPECIALLY WHERE THE BIORETENTION PLANTER IS
LOCATED IN A SUMP AND DEPENDS ON OUTFLOW
THROUGH AN OVERFLOW STRUCTURE/CATCH BASIN.
RELATED COMPONENTS
EDGE TREATMENTS:
INLETS:
OUTLETS:
SOIL & AGGREGATE LAYERS:
UNDERDRAINS:
CHECK DAMS:
LINERS:
UTILITY CROSSINGS:
UTILITY CONFLICTS:
OBSERVATION PORTS:
CLEANOUTS:
-BC
1.1
BC
1.12
-BC
2.1
BC
2.6
-BC
3.1
BC
3.4
GC
1.2
BC
4.1
RELATED SPECIFICATIONS
BIORETENTION:
BIOTREATMENT SOIL MIX PER BASMAA
SPECIFICATIONS (SEE SMCWPPP C.3
REGULATED PROJECTS GUIDE APPENDIX K)
GC
1.1
GC
5.1
-GC
2.1
GC
2.12
BC
5.2
BC
5.1
BC
6.2
BC
6.1
-GC
3.1
GC
3.3
GC
4.2
GC
4.1
BIORETENTION PLANTERGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
1.2
BP
FILE NO.
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LAYOUT REQUIREMENTS:
1. REFER TO THE SMC STANDARD DRAWINGS, ROAD SECTIONS, AND CODES FOR COURTESY STRIP,
THROUGHWAY, PARKING SPACE AND ACCESSIBLE PATH REQUIREMENTS.
2. LOCATE CURB CUTS AND GUTTER MODIFICATIONS TO AVOID CONFLICTS WITH ACCESSIBILITY
REQUIREMENTS (E.G., LOCATE OUTSIDE OF CROSSWALKS).
DESIGNER CHECKLIST (MUST SPECIFY, AS APPLICABLE):
PLANTER WIDTH AND LENGTH
DEPTH OF PONDING
DEPTH OF FREEBOARD
DEPTH OF BIOTREATMENT SOIL
DEPTH AND TYPE OF AGGREGATE STORAGE, IF ANY
PLANTER SURFACE ELEVATION (TOP OF BIOTREATMENT SOIL) AT UPSLOPE AND
DOWNSLOPE ENDS OF FACILITY
CONTROL POINTS AT EVERY PLANTER WALL CORNER AND POINT OF TANGENCY
DIMENSIONS AND DISTANCE TO EVERY INLET, OUTLET, CHECK DAM, SIDEWALK NOTCH, ETC.
ELEVATIONS OF EVERY INLET, OUTLET, STRUCTURE RIM AND INVERT, CHECK DAM,
PLANTER WALL CORNER, AND SIDEWALK NOTCH
TYPE AND DESIGN OF PLANTER COMPONENTS (E.G., EDGE TREATMENTS, INLETS/GUTTER
MODIFICATIONS, UTILITY CROSSINGS, LINER, AND PLANTING DETAILS)
SOIL TYPE GUIDANCE:
BP
1.1
BP
1.2
BP
2.1
BP
2.2
BP
3.1
BP
3.2
BP
4.1
BP
4.2
BP
5.1
BP
5.3
BP
5.5
BP
5.6
BP
5.2
BP
4.3
BP
4.4
BP
4.5
BP
4.6
BP
3.3
BP
3.4
BP
5.7
BP
5.4
HYDROLOGIC
SOIL GROUP SOIL TYPE CORRESPONDING UNIFIED SOIL CLASSIFICATION DESCRIPTION
A SAND, LOAMY SAND, OR
SANDY LOAM
GW - WELL-GRADED GRAVELS, SANDY GRAVELS
GP - GAP-GRADED OR UNIFORM GRAVELS, SANDY GRAVELS
GM - SILTY GRAVELS, SILTY SANDY GRAVELS
SW - WELL-GRADED, GRAVELLY SANDS
SP - GAP-GRADED OR UNIFORM SANDS, GRAVELLY SANDS
LOW RUNOFF POTENTIAL. SOILS HAVING HIGH INFILTRATION
RATES EVEN WHEN THOROUGHLY WETTED AND
CONSISTING CHIEFLY OF DEEP, WELL TO EXCESSIVELY
DRAINED SANDS OR GRAVELS.
B SILT LOAM OR LOAM
SM - SILTY SANDS, SILTY GRAVELLY SANDS
MH - MICACEOUS SILTS, DIATOMACEOUS SILTS, VOLCANIC ASH
SOILS HAVING MODERATE INFILTRATION RATES WHEN
THOROUGHLY WETTED AND CONSISTING CHIEFLY OF
MODERATELY DEEP TO DEEP, MODERATELY WELL TO
WELL-DRAINED SOILS WITH MODERATELY FINE TO
MODERATELY COARSE TEXTURES.
C SANDY CLAY LOAM ML - SILTS, VERY FINE SANDS, SILTY AND CLAYEY FINE SANDS
SOILS HAVING SLOW INFILTRATION RATES WHEN
THOROUGHLY WETTED AND CONSISTING CHIEFLY OF SOILS
WITH A LAYER THAT IMPEDES DOWNWARD MOVEMENT OF
WATER, OR SOILS WITH MODERATELY FINE TO FINE
TEXTURES.
D CLAY LOAM, SANDY CLAY,
SILTY CLAY, OR CLAY
GC - CLAYEY GRAVELS, CLAYEY SANDY GRAVELS
SC - CLAYEY SANDS, CLAYEY GRAVELLY SANDS
CL - LOW PLASTICITY CLAYS, SANDY OR SILTY CLAYS
OL - ORGANIC SILTS AND CLAYS OF LOW PLASTICITY
CH - HIGHLY PLASTIC LAYS AND SANDY CLAYS
OH - ORGANIC SILTS AND CLAYS OF HIGH PLASTICITY
HIGH RUNOFF POTENTIAL. SOILS HAVING VERY SLOW
INFILTRATION RATES WHEN THOROUGHLY WETTED AND
CONSISTING CHIEFLY OF CLAY SOILS WITH A HIGH
SWELLING POTENTIAL, SOILS WITH A PERMANENT HIGH
WATER TABLE, AND SHALLOW SOILS OVER NEARLY
IMPERVIOUS MATERIAL.
A
BP
2
.
2
DESIGNER TO
SPECIFY LENGTH
COURTESY
STRIP, DESIGNER
TO SPECIFY
3' (MIN)
4' (MIN) WITH TREES
DESIGNER TO
SPECIFY WIDTH
THROUGHWAY
WIDTH VARIES,
DESIGNER TO SPECIFY
6"
6"
CURB AND GUTTER
PER SMC DPW
STD D-3
4"
6"6"
CONSTRUCTION NOTES:
1. CHECK DAMS SHALL BE SPACED TO PROVIDE PONDING PER SITE SPECIFIC DESIGN.
2. SLOPE TOP OF PLANTER WALL TO MATCH LONGITUDINAL SLOPE OF ADJACENT SURFACE.
3. LAY OUT DRAINAGE NOTCHES TO PREVENT PONDING BEHIND PLANTER WALL WITH 5' MAXIMUM SPACING BETWEEN
NOTCHES.
4. PROVIDE ONE CLEANOUT PER PLANTER (MIN) FOR FACILITIES WITH UNDERDRAINS.
5. MINIMUM UTILITY SETBACKS AND PROTECTION MEASURES MUST CONFORM TO CURRENT SMC ASSET PROTECTION
STANDARDS AND OTHER UTILITY PROVIDER REQUIREMENTS. COORDINATE WITH ENGINEER IN THE EVENT OF UTILITY
CROSSING AND UTILITY CONFLICTS.
OPTIONAL CHECK DAM,
SEE NOTE 1 AND BC
6.2
TRENCH DRAIN OUTLET
WITH OPTIONAL GUTTER
MODIFICATION, SEE
DRAINAGE NOTCH (TYP), 2 (MIN) PER PLANTER,
EQUALLY SPACED, SEE NOTE 3 AND
RAISED PLANTER WALL,
SEE NOTE 2 AND
SPLASH APRON
INFLOW OVERFLOWGUTTER SLOPE
ROADWAY
WITH PARKING
ACCESSIBLE PATH,
DESIGNER
TO SPECIFY
OPTIONAL EROSION
CONTROL
BC
3.3
BC
6.1
OPTIONAL OVERFLOW
STRUCTURE, SEE BC
3.4
BC
3.1
TRENCH DRAIN
INLET, SEE BC
2.4
OPTIONAL UNDERDRAIN
AND CLEANOUT,
SEE NOTE 4 AND
GC
5.1
BC
5.1
PLANTER VEGETATION,
DESIGNER TO SPECIFY
BC
5.2 BP
2.2
BC
1.1
BC
1.12-
OPTIONAL LATERAL
CONNECTION TO STORM DRAIN MAIN
BC
2.4
ENERGY
DISSIPATION
BC
2.6
BC
2.5-
BIORETENTION PLANTERGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
2.1
BP
FILE NO.
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BP
1.1
BP
1.2
BP
2.1
BP
2.2
BP
3.1
BP
3.2
BP
4.1
BP
4.2
BP
5.1
BP
5.3
BP
5.5
BP
5.6
BP
5.2
BP
4.3
BP
4.4
BP
4.5
BP
4.6
BP
3.3
BP
3.4
BP
5.7
BP
5.4
COURTESY STRIP,
DESIGNER
TO SPECIFY
6"3' (MIN)
VARIES
18" (MIN)
2' (MIN)
2" (MIN) FREEBOARDCURB AND
GUTTER PER
SMC DPW
STD D-3
ROADWAY
WITH PARKING
DESIGN PONDING ELEVATION
BENCH FOR WALL
CONSTRUCTION, SEE
SCARIFIED AND UNCOMPACTED
SUBGRADE, SEE NOTES 1 & 2
EDGE TREATMENT (TYP),
SEE
SIDEWALK
BC
5.1
GC
1.1
CONSTRUCTION NOTES:
1. AVOID COMPACTION OF EXISTING SUBGRADE BELOW PLANTER DURING
CONSTRUCTION.
2. SCARIFY SUBGRADE TO A DEPTH OF 3 INCHES (MIN) IMMEDIATELY PRIOR TO
PLACEMENT OF AGGREGATE STORAGE AND BIOTREATMENT SOIL MATERIAL.
3. MAXIMUM DROP FROM TOP OF SIDEWALK TO TOP OF BIOTREATMENT SOIL SHALL
INCLUDE CONSIDERATIONS FOR BIOTREATMENT SOIL SETTLEMENT.
BC
5.2
6"
RADIUS PER DPW
STANDARDS (TYP)
1"
4"-6" (TYP) EXPOSED WALL
PER DPW STANDARDS
BC
4.1
AGGREGATE STORAGE, SEE
MULCH
BIOTREATMENT SOIL
12" (MIN)
BC
4.1
DRAINAGE NOTCH (TYP)
SLOPE TO PLANTER
EXPANSION JOINT PER DPW
APPROVAL (TYP), DESIGNER
TO SPECIFY EDGE CONNECTION
2"-3" (TYP)
-BC
1.1
BC
1.7
-BC
1.1
BC
1.7
GC
1.2
BIORETENTION PLANTER WITH PARKING A
WITH UNDERDRAIN - ALTERNATIVE 2
NO UNDERDRAIN - ALTERNATIVE 1
BC
3.1
BC
3.4
OVERFLOW
STRUCTURE, SEE
AGGREGATE
STORAGE, SEE
OPTIONAL
IMPERMEABLE
LINER, SEE
UNDERDRAIN, SEE
30" (MAX) UNLESS GUARD RAIL
PROVIDED (TYP), SEE NOTE 3
FRONT VIEW
TYPICAL DRAINAGE NOTCH DETAIL
4"
SIDE VIEW2" (MIN) FREEBOARD
EDGE TREATMENT (TYP),
SEE -BC
1.1
BC
1.7
12" (MIN)
18" (MIN)
2"-3" (TYP)
12"
(MAX)
12"
(MAX)
BIORETENTION PLANTERGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
2.2
BP
FILE NO.
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BP
1.1
BP
1.2
BP
2.1
BP
2.2
BP
3.1
BP
3.2
BP
4.1
BP
4.2
BP
5.1
BP
5.3
BP
5.5
BP
5.6
BP
5.2
BP
4.3
BP
4.4
BP
4.5
BP
4.6
BP
3.3
BP
3.4
BP
5.7
BP
5.4
A
BP
3
.
2
DESIGNER TO SPECIFY LENGTH
THROUGHWAY
WIDTH VARIES,
DESIGNER TO SPECIFY
CURB AND GUTTER PER
PUBLIC WORKS STANDARDS
4"
6"6"
6"
BC
2.2
CURB CUT INLET,
TYPE 1, SEE
OPTIONAL SECONDARY
OVERFLOW OUTLET WITH
OPTIONAL GUTTER
MODIFICATION, SEE
BC
3.2
ROADWAY
OVERFLOWGUTTER SLOPE
DRAINAGE NOTCH (TYP),
2 (MIN) PER PLANTER,
EQUALLY SPACED, SEE NOTE 3 AND
RAISED PLANTER WALL,
SEE NOTES 2 AND
SPLASH APRON
PLANTING
STRIP (TYP)
6"
OPTIONAL EROSION CONTROL
COBBLES
3' (MIN)
4' (MIN)
WITH TREES
DESIGNER TO
SPECIFY WIDTH
BP
3.2OVERFLOW
STRUCTURE, SEE BC
3.1
UNDERDRAIN AND
CLEANOUT,
SEE NOTE 4 AND
GC
5.1
BC
3.4
ENERGY DISSIPATION
PLANTER SURFACE
GRADING AND
VEGETATION, SEE
NOTE 6
6" (MIN), DESIGNER
TO SPECIFY
TAPER CURB TO MATCH
EXISTING GRADE (TYP)
CONSTRUCTION NOTES:
1. CHECK DAMS (IF NEEDED) SHALL BE SPACED TO PROVIDE PONDING PER SITE SPECIFIC DESIGN.
2. SLOPE TOP OF PLANTER WALL TO MATCH LONGITUDINAL SLOPE OF ADJACENT SURFACE.
3. LAY OUT DRAINAGE NOTCHES TO PREVENT PONDING BEHIND PLANTER WALL WITH 5' MAXIMUM SPACING BETWEEN NOTCHES.
4. PROVIDE ONE CLEANOUT PER PLANTER (MIN) AT UPSTREAM END OF UNDERDRAIN.
5. MINIMUM UTILITY SETBACKS AND PROTECTION MEASURES MUST CONFORM TO CURRENT PUBLIC WORKS AND OTHER UTILITY PROVIDER REQUIREMENTS.
COORDINATE WITH ENGINEER IN THE EVENT OF UTILITY CROSSING AND UTILITY CONFLICTS.
6. DESIGNER TO SPECIFY FINISH SURFACE GRADING AND PLANTING. UNLESS OTHERWISE NOTED IN THE GRADING PLAN, THE FINISH SURFACE SHALL BE FLAT TO
PROVIDE THE MAXIMUM WATER STORAGE.
LATERAL CONNECTION TO
STORM DRAIN MAIN
BC
1.1
BC
1.7-
BC
2.2
BC
2.6
OPTIONAL CHECK DAM,
SEE NOTE 1 AND BC
6.1
BC
6.2
12" (MIN)
INFLOW
NOTE ABOUT REFERENCED DETAILS:
THIS DETAIL REFERENCES BIORETENTION COMPONENT AND SECTION DETAILS THAT ARE THE ORIGINAL COUNTY OF SAN MATEO
TYPICAL GI DETAILS AND HAVE NOT BEEN MODIFIED TO ALIGN WITH CCC REQUIREMENTS. IF USED, THE DESIGNER WILL NEED
TO MODIFY THESE DETAILS TO CONFORM TO CCC REQUIREMENTS AND SITE-SPECIFIC CONDITIONS.
BIORETENTION PLANTER*
REVISED
VERSION
DATE
3.1*
BP
FILE NO.
NO
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U
S
E
R
G
U
I
D
E
PARCEL APPLICATIONS
BP
1.1
SECTIONSNOTES
CURB EXTENSION
ALT 1 ALT 2
W/O PARKING
PLAN SECTIONS
W/PARKING
PLAN SECTIONS
NOTES
BP
1.2
BP
2.1
BP
2.2
BP
3.1
BP
3.2
BP
4.1
BP
4.2
BP
5.1
BP
5.3
BP
5.5
BP
5.6
BP
5.2
ALT 3
BP
4.3
ALT 4
BP
4.4
ALT 5
BP
4.5
ALT 6
BP
4.6
BIKEWAY BARRIER
PLAN SECTIONS
BP
3.3
BP
3.4
BP
5.7
BP
5.4
PLAN
GREEN INFRASTRUCTURE
TYPICAL DETAILS
6"
RADIUS PER DPW
STANDARDS (TYP)
4"-6" (TYP) EXPOSED WALL
PER DPW STANDARDS
DRAINAGE NOTCH (TYP)
SLOPE TO PLANTER
EXPANSION JOINT PER DPW
APPROVAL (TYP), DESIGNER
TO SPECIFY EDGE CONNECTION
CONSTRUCTION NOTES:
1. AVOID COMPACTION OF EXISTING SUBGRADE BELOW PLANTER DURING CONSTRUCTION.
2. SCARIFY SUBGRADE TO A DEPTH OF 3 INCHES (MIN) IMMEDIATELY PRIOR TO PLACEMENT OF
AGGREGATE STORAGE AND BIOTREATMENT SOIL MATERIAL.
3. MAXIMUM DROP FROM TOP OF ADJACENT PEDESTRIAN AREA TO TOP OF BIOTREATMENT SOIL SHALL
INCLUDE CONSIDERATIONS FOR BIOTREATMENT SOIL SETTLEMENT.
4. IMPERMEABLE LINER SHALL ONLY BE USED WHEN SITE CONDITIONS REQUIRE USE, UNLESS
DIRECTED BY THE GEOTECHNICAL ENGINEER.
5. INSTALL BIOTREATMENT SOIL MEDIA (BSM) IN EITHER TWO 8" - 12" LIFTS AND THEN WETTED TO
ACCOMMODATE AN EXPECTED 2" OF SETTLING OR THREE 6" LIFTS THEN WETTED WITH ADDITIONAL
BSM ADDED TO THE SURFACE AS NEEDED TO ACHIEVE A FINAL DEPTH OF 18".
BIORETENTION PLANTER WITHOUT PARKING A
FRONT VIEW
TYPICAL DRAINAGE NOTCH DETAIL
4"
GC
1.1
12" (MIN)
GC
1.2
BC
3.1
BC
3.4
OVERFLOW
STRUCTURE, SEE
OPTIONAL IMPERMEABLE
LINER (FLOW-THROUGH
PLANTERS ONLY), SEE
AND NOTE 4
SIDE VIEW1" - 2"
RECOMMENDED
FREEBOARD
BC
1.1
18" (MIN)
3" (MAX) MULCH (RECOMMENDED)
EDGE TREATMENT, SEE
6" (MIN)
12" (MAX)
-BC
1.1
BC
1.7
CLASS 2 PERMEABLE GRAVEL
4" (MIN) UNDERDRAIN AT TOP OF
GRAVEL, SEE UNDERDRAIN NOTES
UNDERDRAIN NOTES:
1. IF PLANTER IS COMPLETELY LINED, E.G., FLOW-THROUGH PLANTER, THE UNDERDRAIN SHALL BE SET
AT THE BOTTOM OF THE LINED PLANTER (2" MAX ABOVE LINER IF BEDDING UNDER PIPE IS NEEDED).
OTHERWISE, THE UNDERDRAIN SHALL BE SET IN A GROOVE AT TOP OF GRAVEL WITH PERFORATIONS
FACING DOWN AS SHOWN.
2. PERFORATED UNDERDRAIN PIPE SHALL BE 4-INCH SDR 35 OR EQUIVALENT.
3. USE A SHORT SECTION OF SOLID SCHEDULE 80 PVC (OR EQUIVALENT) AT THE CONNECTION TO THE
OVERFLOW STRUCTURE AND SEAL PENETRATION WITH NON-SHRINK GROUT.
4. NO GEOTEXTILE FABRICS ARE ALLOWED TO BE INSTALLED AROUND THE UNDERDRAIN OR UNDER
UNLINED BIORETENTION PLANTERS.
NOTE ABOUT REFERENCED DETAILS:
THIS DETAIL REFERENCES BIORETENTION COMPONENT AND SECTION DETAILS THAT ARE THE ORIGINAL
COUNTY OF SAN MATEO TYPICAL GI DETAILS AND HAVE NOT BEEN MODIFIED TO ALIGN WITH CCC
REQUIREMENTS. IF USED, THE DESIGNER WILL NEED TO MODIFY THESE DETAILS TO CONFORM TO CCC
REQUIREMENTS AND SITE-SPECIFIC CONDITIONS.
BIOTREATMENT SOIL MEDIA
DESIGNER TO
SPECIFY MAXIMUM
DROP, SEE NOTE 3
ROADWAY
BIORETENTION PLANTER*GREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
3.2*
BP
FILE NO.
NO
T
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N
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N
-
R
E
F
E
R
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O
U
S
E
R
G
U
I
D
E
PARCEL APPLICATIONS
BP
1.1
SECTIONSNOTES
CURB EXTENSION
ALT 1 ALT 2
W/O PARKING
PLAN SECTIONS
W/PARKING
PLAN SECTIONS
NOTES
BP
1.2
BP
2.1
BP
2.2
BP
3.1
BP
3.2
BP
4.1
BP
4.2
BP
5.1
BP
5.3
BP
5.5
BP
5.6
BP
5.2
ALT 3
BP
4.3
ALT 4
BP
4.4
ALT 5
BP
4.5
ALT 6
BP
4.6
BIKEWAY BARRIER
PLAN SECTIONS
BP
3.3
BP
3.4
BP
5.7
BP
5.4
PLAN
A
BP
3
.
4
DESIGNER TO SPECIFY LENGTH
PAVED BIKEWAY,
DESIGNER TO
SPECIFY WIDTH
CURB AND GUTTER PER
SMC DPW STANDARD D-3
6"BC
2.2
CURB CUT INLET,
TYPE 1 AND SPLASH
APRON, SEE CURB CUT OUTLET WITH
OPTIONAL GUTTER
MODIFICATION, SEE BC
3.2
ROADWAY
INFLOW OVERFLOWGUTTER SLOPE
RAISED PLANTER WALL,
SEE NOTES 2 AND
SLOPE PLANTED AREA
DOWN @ 3:1 (MAX) TO
BIORETENTION
PLANTER FINISH GRADE
6"
OPTIONAL STREAM BED
COBBLES OR EQUAL FOR
EROSION CONTROL
CHECK DAM/ LATERAL BRACING
SEE NOTE 1 AND
OVERFLOW
STRUCTURE, SEE BC
3.1
UNDERDRAIN
AND CLEANOUT,
SEE NOTE 3 AND GC
5.1
BC
5.1
BC
3.4
BC
6.2
BC
6.1
PLANTER VEGETATION,
DESIGNER TO SPECIFY
NOTES:
1. CHECK DAMS SHALL BE SPACED TO PROVIDE PONDING PER SITE SPECIFIC DESIGN.
2. SLOPE TOP OF PLANTER WALL TO MATCH LONGITUDINAL SLOPE OF ADJACENT SURFACE..
3. PROVIDE ONE CLEANOUT PER PLANTER (MIN) AND NO LESS THAN ONE CLEANOUT FOR EVERY 100 LINEAR FEET OF PIPE
FOR FACILITIES WITH UNDERDRAINS.
4. MINIMUM UTILITY SETBACKS AND PROTECTION MEASURES MUST CONFORM TO CURRENT JURISDICTIONAL UTILITY
PROTECTION STANDARDS. COORDINATE WITH ENGINEER IN THE EVENT OF UTILITY CROSSING AND UTILITY CONFLICTS.
OPTIONAL LATERAL CONNECTION
TO STORM DRAIN MAIN
BC
5.2
BC
1.7
BC
1.6 BC
1.1
PROVIDE CURVED
MEDIAN NOSE PER
SMC DPW STDS
3' (MIN)
DESIGNER TO
SPECIFY WIDTH
OPTIONAL GUTTER BETWEEN
CURB CUT INLETS
PAVEMENT
STRIPING, TYP.
BC
1.1
BC
1.7
BIORETENTION PLANTERGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
3.3
BP
FILE NO.
N
T
F
R
N
TR
TI
N
-
R
E
F
E
R
T
ER
ID
BP
1.1
BP
1.2
BP
2.1
BP
2.2
BP
3.1
BP
3.2
BP
4.1
BP
4.2
BP
5.1
BP
5.3
BP
5.5
BP
5.6
BP
5.7
BP
5.2
BP
4.3
BP
4.4
BP
4.5
BP
4.6
BP
3.3
BP
3.4
BP
5.4
3' (MIN) W/O TREES,
4' (MIN) W/ TREES,
SEE NOTE 4
12"
(MAX)
NOTES:
1. AVOID COMPACTION OF EXISTING SUBGRADE BELOW PLANTER DURING
CONSTRUCTION.
2. SCARIFY SUBGRADE TO A DEPTH OF 3 INCHES (MIN) IMMEDIATELY PRIOR TO
PLACEMENT OF AGGREGATE STORAGE AND BIOTREATMENT SOIL MATERIAL.
3. MAXIMUM DROP FROM TOP OF CURB TO TOP OF BIOTREATMENT SOIL SHALL
INCLUDE CONSIDERATIONS FOR BIOTREATMENT SOIL SETTLEMENT.
4. DESIGNER TO SPECIFY PLANTER WIDTH AND IF TREES ARE DESIRED, PROVIDE
ADDITIONAL TREE ROOT VOLUME USING STRUCTURAL SOIL OR SILVA CELLS UNDER
ADJACENT BIKEWAY PAVEMENT.
5. OVERFLOW STRUCTURE TO HAVE SQUARE OR ATRIUM GRATE PER PROJECT DESIGN
AND THE DISCRETION OF THE PUBLIC WORKS DEPARTMENT.
STORMWATER BARRIER PLANTER FOR CLASS 4 BIKEWAY A
BC
5.1
GC
1.1
BC
5.2
12" (MIN)
BC
4.1
GC
1.2
BC
3.1
BC
3.4
OVERFLOW
STRUCTURE, SEE
AND NOTE 5
AGGREGATE
STORAGE, SEE
OPTIONAL
IMPERMEABLE
LINER, SEE
UNDERDRAIN, SEE
2" (MIN) FREEBOARD
EDGE TREATMENT, SEE BC
1.1
18" (MIN)
ROADWAY TRAVELWAY
(NO PARKING)
PLANTER WALL WITH
CURB CUT INLETS
PLANTER WALL
PAVED BIKE LANE
3" (MIN) MULCH
BIOTREATMENT SOIL
-BC
1.1
BC
1.7
BIORETENTION PLANTERGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
3.4
BP
FILE NO.
N
T
F
R
N
TR
TI
N
-
R
E
F
E
R
T
ER
ID
BP
1.1
BP
1.2
BP
2.1
BP
2.2
BP
3.1
BP
3.2
BP
4.1
BP
4.2
BP
5.1
BP
5.3
BP
5.5
BP
5.6
BP
5.7
BP
5.2
BP
4.3
BP
4.4
BP
4.5
BP
4.6
BP
3.3
BP
3.4
BP
5.4
A
BP
3
.
2
*
4"
THROUGHWAY
WIDTH VARIES,
DESIGNER TO SPECIFY
INFLOW
OVERFLOW
RAISED PLANTER WALL,
SEE NOTES 2 & 3
ROADWAY
6"
6"
CURB AND GUTTER
PER PUBLIC WORKS
STANDARDS
3' (MIN)
DESIGNER TO
SPECIFY WIDTH
OPTIONAL EROSION
CONTROL COBBLES
OPTIONAL CHECK
DAM (TYP),
SEE NOTE 1
AND BC
6.1
BC
6.2
OVERFLOW
STRUCTURE SEE BC
3.1
UNDERDRAIN AND
CLEANOUT, SEE
NOTE 4 AND GC
5.1
DRAINAGE NOTCH (TYP), 2
(MIN) PER PLANTER, EQUALLY
SPACED, SEE NOTE 3 AND BP
3.2
PLANTER SURFACE GRADING AND
VEGETATION, SEE NOTE 7
BC
2.2
CURB CUT INLET,
TYPE 1, SEE
CURB CUT INLET,
TYPE 2, SEE
INFLOW
BC
2.3
SPLASH APRON
TAPER CURB TO MATCH
EXISTING GRADE (TYP)
6" (MIN), DESIGNER
TO SPECIFY BC
3.4
OPTIONAL
SECONDARY
OVERFLOW
LATERAL
CONNECTION TO STORM DRAIN MAIN
CONSTRUCTION NOTES:
1. CHECK DAMS (IF NEEDED) SHALL BE SPACED TO PROVIDE PONDING PER SITE SPECIFIC
DESIGN.
2. SLOPE TOP OF PLANTER WALL TO MATCH LONGITUDINAL SLOPE OF ADJACENT SURFACE.
3. LAY OUT DRAINAGE NOTCHES TO PREVENT PONDING BEHIND PLANTER WALL WITH 5'
MAXIMUM SPACING BETWEEN NOTCHES.
4. PROVIDE ONE CLEANOUT PER PLANTER (MIN) AT UPSTREAM END OF UNDERDRAIN.
5. MINIMUM UTILITY SETBACKS AND PROTECTION MEASURES MUST CONFORM TO PUBLIC
WORKS AND OTHER UTILITY PROVIDER REQUIREMENTS. COORDINATE WITH ENGINEER IN
THE EVENT OF UTILITY CROSSING AND UTILITY CONFLICTS.
6. THE TYPE AND LOCATION OF ALL PROPOSED TRAFFIC SAFETY MARKERS AND DELINEATORS
MUST BE APPROVED BY THE TRANSPORTATION AGENCY HAVING JURISDICTION PRIOR TO
INSTALLATION.
6. DESIGNER TO SPECIFY FINISH SURFACE GRADING AND PLANTING. UNLESS OTHERWISE
NOTED IN THE GRADING PLAN, THE FINISH SURFACE SHALL BE FLAT TO PROVIDE THE
MAXIMUM WATER STORAGE.
BC
2.3
15' (MIN) RADIUS
12" (MIN)
OPTIONAL TYPE G
ONE-WAY
RETROREFLECTIVE
PAVEMENT MARKER, 3
EA. (MIN), SEE NOTE 6
NOTE ABOUT REFERENCED DETAILS:
THIS DETAIL REFERENCES BIORETENTION COMPONENT AND SECTION DETAILS THAT ARE THE
ORIGINAL COUNTY OF SAN MATEO TYPICAL GI DETAILS AND HAVE NOT BEEN MODIFIED TO
ALIGN WITH CCC REQUIREMENTS. IF USED, THE DESIGNER WILL NEED TO MODIFY THESE
DETAILS TO CONFORM TO CCC REQUIREMENTS AND SITE-SPECIFIC CONDITIONS.
ENERGY
DISSIPATION
BC
2.6
OPTIONAL TYPE K
MARKER INSTALLED ON
TOP OF CURB, 3 EA.
(MIN), SEE NOTE 6
DIRECTION OF TRAFFIC
10' (MIN) RADIUS
BIORETENTION PLANTER*GREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
4.1*
BP
FILE NO.
NO
T
F
O
R
C
O
N
S
T
R
U
C
T
I
O
N
-
R
E
F
E
R
T
O
U
S
E
R
G
U
I
D
E
PARCEL APPLICATIONS
BP
1.1
SECTIONSNOTES
CURB EXTENSION
ALT 1 ALT 2
W/O PARKING
PLAN SECTIONS
W/PARKING
PLAN SECTIONS
NOTES
BP
1.2
BP
2.1
BP
2.2
BP
3.1
BP
3.2
BP
4.1
BP
4.2
BP
5.1
BP
5.3
BP
5.5
BP
5.6
BP
5.2
ALT 3
BP
4.3
ALT 4
BP
4.4
ALT 5
BP
4.5
ALT 6
BP
4.6
BIKEWAY BARRIER
PLAN SECTIONS
BP
3.3
BP
3.4
BP
5.7
BP
5.4
PLAN
INFLOW
ROADWAY
BC
2.2
CURB CUT INLET,
TYPE 1, SEE
CURB AND GUTTER
PER SMC DPW STD D-3
SPLASH
APRON
BC
3.2
CURB CUT OUTLET
WITH OPTIONAL GUTTER
MODIFICATION, SEE
THROUGHWAY
WIDTH VARIES,
DESIGNER TO SPECIFY
DRAINAGE NOTCH (TYP),
2 MIN PER PLANTER,
EQUALLY SPACED, SEE
NOTE 3 AND
4"
6"
6"
A
BP
3
.
2
OPTIONAL
EROSION CONTROL
OPTIONAL OVERFLOW
STRUCTURE, SEE BC
3.1
BC
3.4
OPTIONAL CHECK
DAM (TYP),
SEE NOTE 1
AND BC
6.1
BC
6.2
BP
3.2
PLANTER VEGETATION,
DESIGNER TO SPECIFY
ENERGY DISSIPATION 3' (MIN),
DESIGNER
TO SPECIFY
6" (MIN), DESIGNER
TO SPECIFY
TAPER CURB TO MATCH
EXISTING GRADE (TYP)
INFLOW
OPTIONAL LATERAL
CONNECTION TO STORM
DRAIN MAIN
CONSTRUCTION NOTES:
1. CHECK DAMS (IF NEEDED) SHALL BE SPACED TO PROVIDE PONDING PER SITE SPECIFIC
DESIGN.
2. SLOPE TOP OF PLANTER WALL TO MATCH LONGITUDINAL SLOPE OF ADJACENT SURFACE.
3. LAY OUT DRAINAGE NOTCHES TO PREVENT PONDING BEHIND PLANTER WALL WITH 5'
MAXIMUM SPACING BETWEEN NOTCHES.
4. PROVIDE ONE CLEANOUT PER PLANTER (MIN) FOR FACILITIES WITH UNDERDRAINS.
5. MINIMUM UTILITY SETBACKS AND PROTECTION MEASURES MUST CONFORM TO CURRENT
SMC ASSET PROTECTION STANDARDS AND OTHER UTILITY PROVIDER REQUIREMENTS.
COORDINATE WITH ENGINEER IN THE EVENT OF UTILITY CROSSING AND UTILITY CONFLICTS.
OPTIONAL UNDERDRAIN
AND CLEANOUT, SEE
NOTE 4 AND BC
5.1
GC
5.1
BC
5.2
10' (MIN) OUTER RADIUS PER
SMCWPPP GI DESIGN GUIDE
(TYP)
BC
2.2
15' (MIN) INNER RADIUS
PER SMCWPPP GI DESIGN
GUIDE (TYP)
BIORETENTION PLANTERGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
4.2
BP
FILE NO.
N
T
F
R
N
TR
TI
N
-
R
E
F
E
R
T
ER
ID
BP
1.1
BP
1.2
BP
2.1
BP
2.2
BP
3.1
BP
3.2
BP
4.1
BP
4.2
BP
5.1
BP
5.3
BP
5.5
BP
5.6
BP
5.2
BP
4.3
BP
4.4
BP
4.5
BP
4.6
BP
3.3
BP
3.4
BP
5.7
BP
5.4
INFLOW
ROADWAY
THROUGHWAY
WIDTH VARIES,
DESIGNER TO SPECIFY
4"
6"
6"
A
BP
3
.
2
OPTIONAL OVERFLOW
STRUCTURE, SEE BC
3.1
BC
3.4
OPTIONAL CHECK
DAM (TYP),
SEE NOTE 1
AND BC
6.1
BC
6.2
CURB AND GUTTER
PER SMC DPW STD D-3
CURB CUT INLET,
TYPE 2, SEE
ENERGY DISSIPATION
3' (MIN),
DESIGNER
TO SPECIFY
BC
2.2
CURB CUT INLET,
TYPE 1, SEE
TAPER CURB TO MATCH
EXISTING GRADE (TYP)
SEE NOTE 6
PLANTER VEGETATION,
DESIGNER TO SPECIFY
DRAINAGE NOTCH (TYP), 2 MIN
PER PLANTER, EQUALLY
SPACED, SEE NOTE 3 AND BP
3.2
OPTIONAL EROSION
CONTROL
OVERFLOW
CURB CUT INLET, TYPE 2,
WITH OPTIONAL GUTTER
MODIFICATION, SEE BC
2.3
BC
2.3
INFLOW
OPTIONAL LATERAL CONNECTION
TO STORM DRAIN MAIN
CONSTRUCTION NOTES:
1. CHECK DAMS (IF NEEDED) SHALL BE SPACED TO PROVIDE
PONDING PER SITE SPECIFIC DESIGN.
2. SLOPE TOP OF PLANTER WALL TO MATCH LONGITUDINAL SLOPE
OF ADJACENT SURFACE.
3. LAY OUT DRAINAGE NOTCHES TO PREVENT PONDING BEHIND
PLANTER WALL WITH 5' MAXIMUM SPACING BETWEEN NOTCHES.
4. PROVIDE ONE CLEANOUT PER PLANTER (MIN) FOR FACILITIES
WITH UNDERDRAINS.
5. MINIMUM UTILITY SETBACKS AND PROTECTION MEASURES MUST
CONFORM TO CURRENT SMC ASSET PROTECTION STANDARDS
AND OTHER UTILITY PROVIDER REQUIREMENTS. COORDINATE
WITH ENGINEER IN THE EVENT OF UTILITY CROSSING AND
UTILITY CONFLICTS.
6. IF STREET PARKING IS ALLOWED IMMEDIATELY ADJACENT TO
THE CURB CUT INLET/OUTLET, THE PLANTER WALL TAPER
SHOULD BE LOCATED 18" BEHIND THE FACE OF CURB.
COORDINATE WITH SMC DPW.
OPTIONAL UNDERDRAIN
AND CLEANOUT, SEE
NOTE 4 AND BC
5.1
GC
5.1
BC
5.2
SPLASH
APRON, SEE BC
2.3
10' (MIN) OUTER RADIUS PER
SMCWPPP GI DESIGN GUIDE
(TYP)
15' (MIN) INNER
RADIUS (TYP)
BIORETENTION PLANTERGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
4.3
BP
FILE NO.
N
T
F
R
N
TR
TI
N
-
R
E
F
E
R
T
ER
ID
BP
1.1
BP
1.2
BP
2.1
BP
2.2
BP
3.1
BP
3.2
BP
4.1
BP
4.2
BP
5.1
BP
5.3
BP
5.5
BP
5.6
BP
5.2
BP
4.3
BP
4.4
BP
4.5
BP
4.6
BP
3.3
BP
3.4
BP
5.7
BP
5.4
CURB CUT INLET,
TYPE 2, SEE
6"
A
BP
3
.
2
OVERFLOWOPTIONAL CHECK DAM,
SEE NOTE 1 AND
4"
3' (MIN)OPTIONAL GUTTER
MODIFICATION AT
OUTLET, SEE
3' (MIN)
DESIGNER TO
SPECIFY WIDTH
SPLASH APRON
6" (MIN), DESIGNER
TO SPECIFY
INFLOW
CONSTRUCTION NOTES:
1. CHECK DAMS (IF NEEDED) SHALL BE SPACED TO PROVIDE PONDING PER SITE SPECIFIC
DESIGN.
2. SLOPE TOP OF PLANTER WALL TO MATCH LONGITUDINAL SLOPE OF ADJACENT SURFACE.
3. LAY OUT DRAINAGE NOTCHES TO PREVENT PONDING BEHIND PLANTER WALL WITH 5'
MAXIMUM SPACING BETWEEN NOTCHES.
4. PROVIDE ONE CLEANOUT PER PLANTER (MIN) FOR FACILITIES WITH UNDERDRAINS.
5. MINIMUM UTILITY SETBACKS AND PROTECTION MEASURES MUST CONFORM TO CURRENT
SMC ASSET PROTECTION STANDARDS AND OTHER UTILITY PROVIDER REQUIREMENTS.
COORDINATE WITH ENGINEER IN THE EVENT OF UTILITY CROSSING AND UTILITY CONFLICTS.
ROADWAY
BC
2.3
CURB AND GUTTER
PER SMC DPW STD D-3
OPTIONAL OVERFLOW
STRUCTURE, SEE
OPTIONAL LATERAL
CONNECTION TO STORM
DRAIN MAIN
PARKING LANE
BC
6.2
BC
6.1
BC
3.1
BC
3.2
BC
3.2
PLANTER VEGETATION,
DESIGNER TO SPECIFY
ENERGY DISSIPATION
OPTIONAL
EROSION CONTROL
BC
5.1
BC
5.2
OPTIONAL UNDERDRAIN AND
CLEANOUT, SEE NOTE 4 AND GC
5.1
BC
2.3
TAPER CURB TO MATCH
EXISTING GRADE (TYP)
THROUGHWAY
WIDTH VARIES,
DESIGNER TO SPECIFY
DRAINAGE NOTCH (TYP), 2
(MIN) PER PLANTER, EQUALLY
SPACED, SEE NOTE 3 AND BP
3.2
15' (MIN) INNER RADIUS
10' (MIN)
OUTER RADIUS
BIORETENTION PLANTERGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
4.4
BP
FILE NO.
N
T
F
R
N
TR
TI
N
-
R
E
F
E
R
T
ER
ID
BP
1.1
BP
1.2
BP
2.1
BP
2.2
BP
3.1
BP
3.2
BP
4.1
BP
4.2
BP
5.1
BP
5.3
BP
5.5
BP
5.6
BP
5.2
BP
4.3
BP
4.4
BP
4.5
BP
4.6
BP
3.3
BP
3.4
BP
5.7
BP
5.4
INFLOW
CURB AND GUTTER PER
PUBLIC WORKS STANDARDS
THROUGHWAY
WIDTH VARIES,
DESIGNER TO SPECIFY
6"
OVERFLOW
STRUCTURE, SEE
A
BP
3
.
2
OPTIONAL
CHECK DAM,
SEE NOTE 1
AND BC
6.2
BC
6.1
BC
3.1
BC
3.2
4"
LATERAL
CONNECTION TO
STORM DRAIN MAIN
ROADWAY
PARKING LANE
OPTIONAL EROSION
CONTROL COBBLES
3' (MIN)
PLANTER SURFACE
GRADING AND
VEGETATION, SEE NOTE 8
SPLASH APRON
ENERGY
DISSIPATION
TAPER CURB TO
MATCH EXISTING
GRADE (TYP)
SEE NOTE 6
3' (MIN)
DESIGNER
TO SPECIFY
6" (MIN), DESIGNER
TO SPECIFY
GUTTER MODIFICATION
AT INLET, SEE BC
2.2
CONSTRUCTION NOTES:
1. CHECK DAMS (IF NEEDED) SHALL BE SPACED TO PROVIDE PONDING PER SITE SPECIFIC DESIGN.
2. SLOPE TOP OF PLANTER WALL TO MATCH LONGITUDINAL SLOPE OF ADJACENT SURFACE.
3. LAY OUT DRAINAGE NOTCHES TO PREVENT PONDING BEHIND PLANTER WALL WITH 5' MAXIMUM SPACING BETWEEN NOTCHES.
4. PROVIDE ONE CLEANOUT PER PLANTER (MIN) AT UPSTREAM END OF UNDERDRAIN.
5. MINIMUM UTILITY SETBACKS AND PROTECTION MEASURES MUST CONFORM TO CURRENT PUBLIC WORKS AND OTHER UTILITY PROVIDER REQUIREMENTS. COORDINATE WITH ENGINEER IN THE EVENT
OF UTILITY CROSSING AND UTILITY CONFLICTS.
6. IF STREET PARKING IS ALLOWED IMMEDIATELY ADJACENT TO THE CURB CUT INLET/OUTLET, THE PLANTER WALL TAPER SHOULD BE LOCATED 18" BEHIND THE FACE OF CURB. COORDINATE WITH DPW.
7. THE TYPE AND LOCATION OF ALL PROPOSED TRAFFIC SAFETY MARKERS AND DELINEATORS MUST BE APPROVED BY THE TRANSPORTATION AGENCY HAVING JURISDICTION PRIOR TO INSTALLATION.
UNDERDRAIN AND
CLEANOUT, SEE
NOTE 4 AND GC
5.1
DRAINAGE NOTCH (TYP), 2
(MIN) PER PLANTER, EQUALLY
SPACED, SEE NOTE 3 AND BP
3.2
BC
2.2
10' (MIN) OUTER RADIUS
15' (MIN) INNER RADIUS
OPTIONAL TYPE G ONE-WAY
RETROREFLECTIVE PAVEMENT
MARKER, 3 EA. (MIN), SEE NOTE 7
OPTIONAL TYPE K
MARKER INSTALLED ON
TOP OF CURB, 3 EA.
(MIN), SEE NOTE 7
12" (MIN)
BC
2.6
OPTIONAL
SECONDARY
OVERFLOW
8. DESIGNER TO SPECIFY FINISH SURFACE GRADING AND
PLANTING. UNLESS OTHERWISE NOTED IN THE GRADING
PLAN, THE FINISH SURFACE SHALL BE FLAT TO PROVIDE
THE MAXIMUM WATER STORAGE.
BIORETENTION PLANTER*GREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
4.5*
BP
FILE NO.
NO
T
F
O
R
C
O
N
S
T
R
U
C
T
I
O
N
-
R
E
F
E
R
T
O
U
S
E
R
G
U
I
D
E
PARCEL APPLICATIONS
BP
1.1
SECTIONSNOTES
CURB EXTENSION
ALT 1 ALT 2
W/O PARKING
PLAN SECTIONS
W/PARKING
PLAN SECTIONS
NOTES
BP
1.2
BP
2.1
BP
2.2
BP
3.1
BP
3.2
BP
4.1
BP
4.2
BP
5.1
BP
5.3
BP
5.5
BP
5.6
BP
5.2
ALT 3
BP
4.3
ALT 4
BP
4.4
ALT 5
BP
4.5
ALT 6
BP
4.6
BIKEWAY BARRIER
PLAN SECTIONS
BP
3.3
BP
3.4
BP
5.7
BP
5.4
PLAN
CURB AND GUTTER
PER SMC DPW STD D-3
THROUGHWAY
WIDTH VARIES,
DESIGNER TO SPECIFY
6"
OPTIONAL OVERFLOW
STRUCTURE, SEE
A
BP
3
.
2
OVERFLOW
BC
3.1
BC
3.2
4"
OPTIONAL LATERAL
CONNECTION TO
STORM DRAIN MAIN
ROADWAY
OPTIONAL EROSION
CONTROL
3' (MIN)
PLANTER VEGETATION,
DESIGNER TO SPECIFY
SPLASH APRON
ENERGY DISSIPATION
TAPER CURB TO MATCH
EXISTING GRADE (TYP)
SEE NOTE 6
CURB CUT INLET,
TYPE 2, SEE
6" (MIN), DESIGNER
TO SPECIFY
BC
2.3
INFLOW
CONSTRUCTION NOTES:
1. CHECK DAMS (IF NEEDED) SHALL BE SPACED TO PROVIDE PONDING PER SITE SPECIFIC DESIGN.
2. SLOPE TOP OF PLANTER WALL TO MATCH LONGITUDINAL SLOPE OF ADJACENT SURFACE.
3. LAY OUT DRAINAGE NOTCHES TO PREVENT PONDING BEHIND PLANTER WALL WITH 5' MAXIMUM SPACING
BETWEEN NOTCHES.
4. PROVIDE ONE CLEANOUT PER PLANTER (MIN) FOR FACILITIES WITH UNDERDRAINS.
5. MINIMUM UTILITY SETBACKS AND PROTECTION MEASURES MUST CONFORM TO CURRENT SMC ASSET
PROTECTION STANDARDS AND OTHER UTILITY PROVIDER REQUIREMENTS. COORDINATE WITH
ENGINEER IN THE EVENT OF UTILITY CROSSING AND UTILITY CONFLICTS.
6. IF STREET PARKING IS ALLOWED IMMEDIATELY ADJACENT
TO THE CURB CUT INLET/OUTLET, THE PLANTER WALL
TAPER SHOULD BE LOCATED 18" BEHIND THE FACE OF CURB.
COORDINATE WITH SMC DPW.
OPTIONAL UNDERDRAIN
AND CLEANOUT, SEE
NOTE 4 AND BC
5.1
GC
5.1
BC
5.2
DRAINAGE NOTCH (TYP), 2
(MIN) PER PLANTER, EQUALLY
SPACED, SEE NOTE 3 AND BP
3.2
BC
2.3
10' (MIN) OUTER RADIUS
15' (MIN) INNER RADIUS
BIORETENTION PLANTERGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
4.6
BP
FILE NO.
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ID
BP
1.1
BP
1.2
BP
2.1
BP
2.2
BP
3.1
BP
3.2
BP
4.1
BP
4.2
BP
5.1
BP
5.3
BP
5.5
BP
5.6
BP
5.2
BP
4.3
BP
4.4
BP
4.5
BP
4.6
BP
3.3
BP
3.4
BP
5.7
BP
5.4
BIORETENTION PLANTERGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
5.1
BP
FILE NO.
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ID
PURPOSE:
PARCEL BIORETENTION PLANTERS CONTROL PEAK FLOWS AND VOLUMES OF STORMWATER RUNOFF BY PROVIDING SURFACE, SUBSURFACE STORAGE AND INFILTRATION INTO NATIVE SOIL. WATER IS
TREATED AS IT FILTERS THROUGH THE BIOTREATMENT SOIL. BIORETENTION PLANTERS MAY ALSO BE REFERRED TO AS STORMWATER PLANTERS AND INCLUDE 3 TYPES OF PLANTERS: BIOINFILTRATION
(UNLINED, NO UNDERDRAIN), BIORETENTION (UNDER-DRAINED) AND FLOW-THROUGH (LINED WITH UNDERDRAIN). ALL TYPES TYPICALLY HAVE VERTICAL SIDE WALLS IN ORDER TO MAXIMIZE WATER
STORAGE VOLUME IN CONSTRAINED SITES.
DESIGNER NOTES & GUIDELINES:
1. THE DESIGNER MUST ADAPT PLAN AND SECTION DRAWINGS TO ADDRESS BUILDING- AND SITE-SPECIFIC CONDITIONS.
2. THE DESIGNER MUST COMPLY WITH ALL APPLICABLE SITE AND BUILDING CODE REQUIREMENTS FOR ON-SITE ACCESSIBILITY AND SAFETY INCLUDING, BUT NOT LIMITED TO, CURBS, PEDESTRIAN
SURFACING, AND GUARDRAILS/FALL HEIGHTS.
3. PLANTER AREA, PONDING DEPTH, BIOTREATMENT SOIL DEPTH, AND AGGREGATE STORAGE DEPTH MUST BE SIZED TO MEET PROJECT-SPECIFIC PERFORMANCE GOALS.
4. FACILITY DRAWDOWN TIME (I.E., TIME FOR SURFACE PONDING TO DRAIN THROUGH THE ENTIRE SECTION INCLUDING AGGREGATE STORAGE AFTER THE END OF A STORM) REQUIREMENTS:
x 48 HOUR (PREFERRED), 72 HOUR MAXIMUM FACILITY DRAWDOWN (i.e. ORIFICE CONTROLLED SYSTEM OR EXTENDED STORAGE DEPTH WITHIN INFILTRATION SYSTEM)
5. CHECK DAMS MAY BE USED TO TERRACE FACILITIES TO PROVIDE SUFFICIENT PONDING FOR HIGHER-SLOPED INSTALLATIONS. DESIGNER MUST SPECIFY CHECK DAM HEIGHT AND SPACING. REFER TO
BC 6.1 AND BC 6.2 FOR GUIDANCE ON CHECK DAM DESIGN.
6. PLANTER OVERFLOW STRUCTURES SHALL BE DESIGNED TO CONVEY THE ANTICIPATED DESIGN FLOWS PER SMC REQUIREMENTS.
7. PLANTERS SHALL BE DESIGNED TO OVERFLOW TO THE STREET IN THE EVENT THE PLANTER OUTLET IS OBSTRUCTED OR CLOGGED.
8. MATERIALS FOR PLANTERS MAY VARY TO WORK WITH SITE AND ARCHITECTURAL PALETTE.
9. FACILITIES ADJACENT TO A BUILDING (WITHIN 10 FEET) SHOULD BE LINED TO AVOID NEGATIVE IMPACTS OF WATER AT FOUNDATION. LINER CAN BE OMITTED WITH LETTER FROM LICENSED DESIGN
PROFESSIONAL(S) STATING THAT BUILDING WATERPROOFING, STRUCTURAL INTEGRITY, AND STORMWATER FUNCTION IS NOT IMPACTED.
10. FACILITIES MAY BE EXTENDED ABOVE GRADE FOR SEATWALL OR RAISED PLANTER CONFIGURATIONS, IF APPROPRIATE CONVEYANCE MEASURES ARE PROVIDED TO MEET DESIGN REQUIREMENTS.
11. CONVEYANCE CONNECTIONS MAY BE CONFIGURED TO ACCEPT RUNOFF VIA OVERHEAD CONVEYANCE (DOWNSPOUTS, OVERHEAD RUNNELS), SURFACE FLOW (CHANNELS), OR SUBSURFACE
CONVEYANCE (PIPES, TRENCH DRAINS). REFER TO APPLICABLE SMC PLANNING AND BUILDING CODES FOR CONVEYANCE CONNECTION REQUIREMENTS.
12. CONVEYANCE CONNECTIONS (E.G. SCUPPER, CHANNEL, PIPE) SHALL BE SIZED TO ACCOMMODATE DRAINAGE FROM ROOF AREA WITH ADEQUATE FREEBOARD TO AVOID OVERFLOWING. REFER TO
APPLICABLE SMC PLANNING AND BUILDING CODES FOR CONVEYANCE CONNECTION REQUIREMENTS.
13. UNDERDRAINS REQUIRED ON STRUCTURE TO DRAIN PLANTER AND AVOID ACCUMULATION OF WATER ON STRUCTURE WATERPROOFING SYSTEM.
14. OVERFLOW STRUCTURE (MATERIAL AND WORKMANSHIP) SHALL CONFORM TO APPLICABLE SMC PLANNING, BUILDING AND PUBLIC WORKS CODES AND REQUIREMENTS. SIZE AND MODEL OF ATRIUM
GRATE AT OVERFLOW TO BE DETERMINED BY ENGINEER TO ENSURE CONVEYANCE OF PEAK FLOW.
15. THE DESIGNER MUST EVALUATE UTILITY SURVEYS FOR POTENTIAL UTILITY CROSSINGS OR CONFLICTS. REFER TO GC 2.1 - GC 2.12 FOR UTILITY CROSSING DETAILS AND GC 1.4 - GC 4.4 FOR UTILITY
CROSSING CONFLICT DETAILS.
18. REFER TO SMC PLANNING AND BUILDING CODES FOR CURB AND/OR RAILING REQUIREMENTS.
19. FREEBOARD REQUIREMENTS SHOWN SHOULD BE USED AS GUIDELINES BUT THE
DESIGNER SHALL REFER TO THE SMCWPPP C.3 TECHNICAL GUIDANCE MANUAL
FOR ADDITIONAL FREEBOARD REQUIREMENTS, ESPECIALLY
WHERE THE BIORETENTION PLANTER IS LOCATED IN A SUMP
AND DEPENDS ON OUTFLOW THROUGH AN OVERFLOW
STRUCTURE/CATCH BASIN.BP
1.1
BP
1.2
BP
2.1
BP
2.2
BP
3.1
BP
3.2
BP
4.1
BP
4.2
BP
5.1
BP
5.3
BP
5.5
BP
5.6
BP
5.2
BP
4.3
BP
4.4
BP
4.5
BP
4.6
BP
3.3
BP
3.4
BP
5.7
BP
5.4
BIORETENTION PLANTERGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
5.2
BP
FILE NO.
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ID
LAYOUT REQUIREMENTS:
THE DESIGNER MUST COMPLY WITH ALL STORMWATER, LAND USE, AND BUILDING CODE
REQUIREMENTS:
1. ADHERE TO ALL CODES FOR ACCESSIBILITY REQUIRED FOR PARCEL LEVEL DEVELOPMENT
2. PARCEL PLANTERS SHOULD NOT INTERFERE WITH OTHER LAND USE REQUIREMENTS SUCH AS
BUFFERING AND SCREENING, SETBACKS, SIGHT DISTANCE, AND MINIMUM SITE COVERAGE.
3. DESIGNER MUST COMPLY WITH ALL CURRENT LOCAL CODES, INCLUDING BUT NOT LIMITED TO:
x COUNTY OF SAN MATEO STORMWATER AND DRAINAGE ORDINANCE
x COUNTY OF SAN MATEO PLANNING ORDINANCE
x CALIFORNIA BUILDING CODE
x COUNTY OF SAN MATEO BUILDING CODE AMENDMENTS
x ADA STANDARDS FOR ACCESSIBLE DESIGN
DESIGNER CHECKLIST (MUST SPECIFY, AS APPLICABLE):
PLANTER WIDTH AND LENGTH
DEPTH OF PONDING
DEPTH OF FREEBOARD
DEPTH OF BIOTREATMENT SOIL
DEPTH AND TYPE OF GRAVEL STORAGE
PLANTER SURFACE ELEVATION (TOP OF BIOTREATMENT SOIL) AT UPSLOPE AND DOWNSLOPE
ENDS OF FACILITY
CONTROL POINTS AT EVERY PLANTER WALL CORNER OR POINT OF TANGENCY
DIMENSIONS AND DISTANCE TO EVERY INLET, OUTLET, CHECK DAM, SIDEWALK NOTCH, ETC.
ELEVATIONS OF EVERY INLET, OUTLET, STRUCTURE RIM AND INVERT, CLEAN OUT, PLANTER
WALL CORNER, AND SIDEWALK NOTCH
TYPE AND DESIGN OF PLANTER COMPONENTS (E.G., EDGE TREATMENTS, INLETS/GUTTER
MODIFICATIONS, UTILITY CROSSINGS, LINER, AND PLANTING DETAILS).
OVERFLOW STRUCTURE AND ATRIUM GRATE SIZE AND MODEL NUMBER
BP
1.1
BP
1.2
BP
2.1
BP
2.2
BP
3.1
BP
3.2
BP
4.1
BP
4.2
BP
5.1
BP
5.3
BP
5.5
BP
5.6
BP
5.2
BP
4.3
BP
4.4
BP
4.5
BP
4.6
BP
3.3
BP
3.4
BP
5.7
BP
5.4
RELATED COMPONENTS
EDGE TREATMENTS:
INLETS:
OUTLETS:
SOIL & AGGREGATE LAYERS:
UNDERDRAINS:
CHECK DAMS:
LINERS:
UTILITY CROSSINGS:
UTILITY CONFLICTS:
OBSERVATION PORTS:
CLEANOUTS:
-BC
1.1
BC
1.12
-BC
2.1
BC
2.6
-BC
3.1
BC
3.4
GC
1.2
BC
4.1
RELATED SPECIFICATIONS
BIORETENTION:
BIOTREATMENT SOIL MIX PER BASMAA
SPECIFICATIONS (SEE SMCWPPP C.3
REGULATED PROJECTS GUIDE
APPENDIX K)
GC
1.1
GC
5.1
-GC
2.1
GC
2.12
GC
6.2
GC
6.1
GC
5.2
GC
5.1
-GC
3.1
GC
3.3
-GC
4.1
GC
4.3
B,
C
BP
5
.
6
,
B
P
5
.
7
DOWNSPOUT FROM
BUILDING
OPTIONAL DRAINAGE
NOTCH (TYP), SEE NOTE 210' (MIN) FOR
INFILTRATION
FACILITIES,
DESIGNER
TO SPECIFY
CONVEYANCE CONNECTION
DESIGNER TO SPECIFY
4"
STORM DRAIN PIPE,
DESIGNER TO SPECIFY
OVERFLOW STRUCTURE
WITH ATRIUM GRATE
DESIGNER TO SPECIFY
SIZE AND MODEL
PLAN - ALTERNATIVE 1 1
OPTIONAL UNDERDRAIN
AND CLEANOUT,
SEE NOTE 4 AND GC
5.1
BC
5.2
PLANTER VEGETATION,
DESIGNER TO SPECIFY
CONSTRUCTION NOTES:
1. CHECK DAMS SHALL BE SPACED TO PROVIDE PONDING PER SITE SPECIFIC DESIGN.
2. LAY OUT DRAINAGE NOTCHES TO PREVENT PONDING BEHIND PLANTER WALL WITH 5' MAXIMUM
SPACING BETWEEN NOTCHES .
3. COORDINATE WATERPROOFING AT BUILDINGS WITH ARCHITECT AND ENGINEER.
4. PROVIDE ONE CLEANOUT PER PLANTER (MIN) FOR FACILITIES WITH UNDERDRAINS.
5. MINIMUM UTILITY SETBACKS AND PROTECTION MEASURES MUST CONFORM TO CURRENT SMC
ASSET PROTECTION STANDARDS AND OTHER UTILITY PROVIDER REQUIREMENTS.
COORDINATE WITH ENGINEER IN THE EVENT OF UTILITY CROSSING AND UTILITY CONFLICTS.
ENERGY
DISSIPATION
BC
5.1
OPTIONAL CHECK
DAM (TYP), SEE
NOTE 1 AND BC
6.1
BC
6.2
BIORETENTION PLANTERGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
5.3
BP
FILE NO.
N
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ID
BP
1.1
BP
1.2
BP
2.1
BP
2.2
BP
3.1
BP
3.2
BP
4.1
BP
4.2
BP
5.1
BP
5.3
BP
5.5
BP
5.6
BP
5.2
BP
4.3
BP
4.4
BP
4.5
BP
4.6
BP
3.3
BP
3.4
BP
5.7
BP
5.4
A
BP
5
.
5
BUILDING FAÇADE AND WATERPROOFING,
DESIGNER TO SPECIFY, SEE NOTE 3
OVERFLOW STRUCTURE
WITH ATRIUM GRATE
DESIGNER TO SPECIFY
SIZE AND MODEL
ADJACENT
SURFACE
VARIES (TYP)
OPTIONAL
WALL AT
BUILDING FACE
CONSTRUCTION NOTES:
1. CHECK DAMS SHALL BE SPACED TO PROVIDE PONDING PER SITE SPECIFIC DESIGN.
2. LAY OUT DRAINAGE NOTCHES TO PREVENT PONDING BEHIND PLANTER WALL WITH
5' MAXIMUM SPACING BETWEEN NOTCHES .
3. COORDINATE WATERPROOFING AT BUILDINGS WITH ARCHITECT AND ENGINEER.
4. PROVIDE ONE CLEANOUT PER PLANTER (MIN) FOR FACILITIES WITH UNDERDRAINS.
5. MINIMUM UTILITY SETBACKS AND PROTECTION MEASURES MUST CONFORM TO
CURRENT SMC ASSET PROTECTION STANDARDS AND OTHER UTILITY PROVIDER
REQUIREMENTS. COORDINATE WITH ENGINEER IN THE EVENT OF UTILITY
CROSSING AND UTILITY CONFLICTS.
STORM DRAIN PIPE,
DESIGNER TO SPECIFY
DOWNSPOUT
FROM BUILDING
PLAN - ALTERNATIVE 2 1
OPTIONAL
UNDERDRAIN AND
CLEANOUT, SEE
NOTE 4 AND BC
5.2
BC
5.1
OPTIONAL CHECK
DAM (TYP), SEE
NOTE 1 AND BC
6.1PLANTER VEGETATION,
DESIGNER TO SPECIFY
GC
5.1
BC
6.2
ENERGY
DISSIPATION
BIORETENTION PLANTERGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
5.4
BP
FILE NO.
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ID
BP
1.1
BP
1.2
BP
2.1
BP
2.2
BP
3.1
BP
3.2
BP
4.1
BP
4.2
BP
5.1
BP
5.3
BP
5.5
BP
5.6
BP
5.2
BP
4.3
BP
4.4
BP
4.5
BP
4.6
BP
3.3
BP
3.4
BP
5.7
BP
5.4
BC
1.4
HEIGHT
VARIES
GC
2.11
SECTION - RAISED BIORETENTION PLANTER A
CONSTRUCTION NOTES:
1. INSTALL DOWNSPOUTS OR OTHER
CONVEYANCE CONNECTIONS (E.G. SCUPPER,
CHANNEL, OVERHEAD RUNNEL) FROM BUILDING
TO DRAIN ABOVE DESIGN PONDING ELEVATION.
REFER TO SMC PLUMBING CODE FOR
CONVEYANCE CONNECTION REQUIREMENTS.
2. BUILDING WATERPROOFING BY ARCHITECT;
COORDINATE PLANTER CONSTRUCTION WITH
BUILDING FAÇADE / WATERPROOFING.
3. PROVIDE WALL AT BUILDING FACE IN
CASES WHERE GAP IS REQUIRED BETWEEN
WALL AND PLANTER OR WHERE BUILDING
FAÇADE IS INCOMPATIBLE WITH PLANTER
CONFIGURATION.
4. OVERFLOW STRUCTURE (MATERIAL AND
WORKMANSHIP) SHALL CONFORM TO SMC
PLUMBING CODE.
INTERIOR OR EXTERIOR
DOWNSPOUT, DESIGNER
TO SPECIFY, SEE NOTE 1
ADJACENT BUILDING WALL, SEE NOTE 2
WALL PENETRATION, SEE
ADJACENT
SURFACE, VARIES
WIDTH VARIES
VARIES
18" (MIN)
GC
5.1
UNDERDRAIN, SEE
GC
1.2
IMPERMEABLE LINER, SEE
OPTIONAL WALL AT ADJACENT
BUILDING FACE, SEE NOTE 3
OVERFLOW STRUCTURE,
DESIGNER TO SPECIFY,
SEE NOTE 4
WIDTH VARIES DEPENDING
ON EDGE TREATMENT
DESIGN
PONDING
ELEVATION
2" (MIN) FREEBOARD
GC
2.10
BC
5.1
AGGREGATE STORAGE, SEE BC
4.1
MULCH
BC
1.10
EDGE TREATMENT, DESIGNER TO
SPECIFY MATERIAL, SEE
2"-3" MULCH (TYP)
GC
2.9
GC
1.1
ATRIUM GRATE
DESIGNER TO SPECIFY
MODEL AND SIZE
INTERIOR OR EXTERIOR
DOWNSPOUT, DESIGNER
TO SPECIFY, SEE NOTE 1
EXTEND LINER OR EQUAL
WATERPROOFING TO TOP OF
PONDING ELEVATION WHEN
ADJACENT TO BUILDING WALL
ENERGY DISSIPATION
GC
2.9STORM DRAIN PIPE, SEE
BIOTREATMENT SOIL
BC
5.2
EL.X
12"
MAX
-
BIORETENTION PLANTERGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
5.5
BP
FILE NO.
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ID
BP
1.1
BP
1.2
BP
2.1
BP
2.2
BP
3.1
BP
3.2
BP
4.1
BP
4.2
BP
5.1
BP
5.3
BP
5.5
BP
5.6
BP
5.2
BP
4.3
BP
4.4
BP
4.5
BP
4.6
BP
3.3
BP
3.4
BP
5.7
BP
5.4
SECTION - SURFACE BIORETENTION PLANTER B
VARIES
10' (MIN) FOR
INFILTRATION FACILITIES
CONSTRUCTION NOTES:
1. INSTALL DOWNSPOUTS AND OTHER
CONVEYANCE CONNECTIONS (E.G. SCUPPER,
CHANNEL, OVERHEAD RUNNEL) FROM BUILDING
TO DRAIN ABOVE DESIGN PONDING ELEVATION.
REFER TO SMC PLUMBING CODE FOR
CONVEYANCE CONNECTION REQUIREMENTS.
2. AVOID COMPACTION OF EXISTING SUBGRADE
BELOW PLANTER FOR INFILTRATION FACILITIES.
3. SCARIFY SUBGRADE TO A DEPTH OF 3 INCHES
(MIN) IMMEDIATELY PRIOR TO PLACEMENT OF
AGGREGATE STORAGE AND BIOTREATMENT SOIL
MATERIALS.
4. UNDERDRAIN AND LINER REQUIRED WITHIN 10
FEET OF BUILDING ENVELOPE UNLESS
APPROVED PER DESIGNER.
5. MAXIMUM DROP FROM TOP OF WALKING
SURFACE TO TOP OF MULCH SHALL INCLUDE
CONSIDERATIONS FOR SOIL SETTLEMENT.
6. LAY OUT DRAINAGE NOTCHES TO PREVENT
PONDING BEHIND PLANTER WALL. SLOPE
NOTCHES TO DRAIN TO PLANTER.
7. OVERFLOW STRUCTURE (MATERIAL AND
WORKMANSHIP) SHALL CONFORM TO SMC
PLUMBING CODE.
DEPTH VARIES,
SEE NOTE 5
ADJACENT
BUILDING WALL
GC
1.2
OPTIONAL IMPERMEABLE
LINER, SEE NOTE 4 AND
CONVEYANCE
CONNECTION,
SEE NOTE 1
ADJACENT
SURFACE, VARIES
18" (MIN)
INTERIOR OR EXTERIOR
DOWNSPOUT, DESIGNER
TO SPECIFY, SEE NOTE 1
GC
5.1
DESIGN PONDING ELEVATION
OVERFLOW STRUCTURE, DESIGNER TO SPECIFY, SEE NOTE 7
SCARIFIED AND UNCOMPACTED SUBGRADE FOR
INFILTRATING FACILITIES, SEE NOTES 2 & 3
WIDTH VARIES DEPENDING
ON EDGE TREATMENT
BC
5.2
AGGREGATE STORAGE, SEE BC
4.1
4"-6" (TYP)
EXPOSED WALL
PER DPW
STANDARDS
MULCH
2" (MIN)
FREEBOARD
EDGE TREATMENT, DESIGNER TO
SPECIFY MATERIAL, SEE
2"-3" MULCH (TYP)
4" DRAINAGE
NOTCH, SEE
NOTE 6
GC
2.11
WALL PENETRATION,
SEE GC
2.10
GC
2.9
ENERGY DISSIPATION
WIDTH VARIES
GC
1.1
GC
2.9STORM DRAIN PIPE, SEE
ATRIUM GRATE,
DESIGNER TO SPECIFY
MODEL AND SIZE
BIOTREATMENT SOIL
OPTIONAL UNDERDRAIN,
SEE NOTE 4 AND BC
5.1
EXTEND LINER OR EQUAL
WATERPROOFING TO TOP OF
PONDING ELEVATION WHEN
ADJACENT TO BUILDING WALL
12"
MAX
BC
1.4
BC
1.10-
BIORETENTION PLANTERGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
5.6
BP
FILE NO.
N
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F
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ID
BP
1.1
BP
1.2
BP
2.1
BP
2.2
BP
3.1
BP
3.2
BP
4.1
BP
4.2
BP
5.1
BP
5.3
BP
5.5
BP
5.6
BP
5.2
BP
4.3
BP
4.4
BP
4.5
BP
4.6
BP
3.3
BP
3.4
BP
5.7
BP
5.4
SECTION - BIORETENTION PLANTER ON STRUCTURE C
HEIGHT
VARIES
CONSTRUCTION NOTES:
1. INTEGRATE WATERPROOFING WITH
BUILDING ROOFING/WATERPROOFING
SYSTEMS INCLUDING WATERPROOF PIPE
PENETRATIONS, JOINTS, AND LINER
CONNECTIONS.
2. OVERFLOW STRUCTURE (MATERIAL AND
WORKMANSHIP) SHALL CONFORM TO SMC
PLUMBING CODE.
ADJACENT SURFACE, VARIES
ADJACENT
BUILDING
CONVEYANCE CONNECTION,
DESIGNER TO SPECIFY
2" (MIN) FREEBOARD
18" (MIN)
EDGE TREATMENT, DESIGNER
TO SPECIFY MATERIAL
OVERFLOW STRUCTURE,
DESIGNER TO SPECIFY,
SEE NOTE 2
ADJACENT
SURFACE, VARIES
OVERFLOW TO BUILDING DRAINS
ROOF DRAIN (TYP)
ROOF DECK
IMPERMEABLE LINER,
SEE NOTE 1 AND
UNDERDRAIN, SEE
GC
1.2
WIDTH VARIES
WIDTH VARIES DEPENDING
ON EDGE TREATMENT
ENERGY DISSIPATION
RAIN CHAIN OR EQUAL
EXTEND LINER OR EQUAL WATERPROOFING
TO TOP OF PONDING ELEVATION WHEN
ADJACENT TO BUILDING WALL
DESIGN PONDING ELEVATION
BC
5.2
BC
5.1 AGGREGATE STORAGE, SEE BC
4.1
MULCH
2"-3" MULCH (TYP)
GC
1.1
ATRIUM GRATE,
DESIGNER TO SPECIFY
MODEL AND SIZE
WALL PENETRATION PER
ARCHITECTURAL PLANS
BIOTREATMENT SOIL
12" (MAX)
12" (MIN)
BIORETENTION PLANTERGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
5.7
BP
FILE NO.
N
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TI
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F
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ID
BP
1.1
BP
1.2
BP
2.1
BP
2.2
BP
3.1
BP
3.2
BP
4.1
BP
4.2
BP
5.1
BP
5.3
BP
5.5
BP
5.6
BP
5.2
BP
4.3
BP
4.4
BP
4.5
BP
4.6
BP
3.3
BP
3.4
BP
5.7
BP
5.4
RELATED COMPONENTS
EDGE TREATMENTS:
INLETS:
OUTLETS:
SOIL & AGGREGATE LAYERS:
UNDERDRAINS:
CHECK DAMS:
LINERS:
UTILITY CROSSINGS:
UTILITY CONFLICTS:
OBSERVATION PORTS:
CLEANOUTS:
BIORETENTION BASINGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
1.1
BB
FILE NO.
PURPOSE:
BIORETENTION BASINS CAPTURE AND TREAT STORMWATER RUNOFF VIA SURFACE AND
SUBSURFACE STORAGE, FILTRATION THROUGH BIOTREATMENT SOIL, AND INFILTRATION INTO
NATIVE SOIL WHERE FEASIBLE. BIORETENTION BASINS MAY ALSO BE REFERRED TO AS RAIN
GARDENS AND INCLUDE 3 TYPES OF PLANTERS: INFILTRATION (NO UNDERDRAIN), BIORETENTION
(UNDER-DRAINED) AND FLOW THROUGH (LINED WITH UNDERDRAIN).
DESIGNER NOTES & GUIDELINES:
1. THE DESIGNER MUST ADAPT PLAN AND SECTION DRAWINGS TO ADDRESS SITE-SPECIFIC
CONDITIONS.
2. FACILITY AREA, PONDING DEPTH, BIOTREATMENT SOIL DEPTH, AND AGGREGATE STORAGE
DEPTH MUST BE SIZED TO MEET PROJECT HYDROLOGIC PERFORMANCE GOALS.
3. FACILITY DRAWDOWN TIME (I.E., TIME FOR SURFACE PONDING TO DRAIN THROUGH THE ENTIRE
SECTION INCLUDING AGGREGATE STORAGE AFTER THE END OF A STORM) REQUIREMENTS:
x 48 HOUR (PREFERRED), 72 HOUR MAXIMUM FACILITY DRAWDOWN (i.e. ORIFICE CONTROLLED
SYSTEM OR EXTENDED STORAGE DEPTH WITHIN INFILTRATION SYSTEM).
4. AN AGGREGATE COURSE IS REQUIRED UNDER THE BIOTREATMENT SOIL FOR BIORETENTION IN
SEPARATE SEWER SYSTEM AREAS TO PROVIDE ADDITIONAL TREATMENT. SEE GUIDANCE ON BC
4.1.
5. CHECK DAMS MAY BE USED TO TERRACE FACILITIES TO PROVIDE SUFFICIENT PONDING FOR
HIGHER-SLOPED INSTALLATIONS. DESIGNER MUST SPECIFY CHECK DAM HEIGHT AND SPACING.
REFER TO BC 6.1 AND BC 6.2 FOR GUIDANCE ON CHECK DAM DESIGN.
6. THE FOLLOWING GUIDELINES APPLY TO RIGHT-OF-WAY APPLICATIONS:
x BULBOUT CURB RADIUS SHALL BE 15' (MIN) PER SMCWPPP GI DESIGN GUIDE.
x WHEN FACILITY CONSTRUCTION IMPACTS EXISTING SIDEWALK, ALL SAW CUTS MUST
ADHERE TO SMC REQUIREMENTS. SAW CUTS SHOULD BE ALONG SCORE LINES AND ANY
DISTURBED SIDEWALK FLAGS SHOULD BE REPLACED IN THEIR ENTIRETY.
x DESIGNER TO SPECIFY TRANSITION OF PLANTER TO TOP OF CURB ELEVATION BETWEEN
CURB CUTS OR CONTINUOUS 6 INCH REVEAL AT CURB EDGE.
7. UP TO TWO PLANTERS MAY BE CONNECTED IN SERIES, IN LIEU OF MULTIPLE INLETS,
PROVIDED THE CONNECTION IS A TRENCH DRAIN OR EQUAL SURFACE CONVEYANCE AND IS
ADEQUATELY SIZED TO CONVEY FLOWS.
8. MINIMUM UTILITY SETBACKS AND PROTECTION MEASURES MUST CONFORM TO CURRENT
JURISDICTIONAL ASSET PROTECTION STANDARDS. IN THE ABSENCE OF THESE STANDARDS, THE
DESIGNER SHALL REFER TO CHAPTER 3 OF SMCWPPP GI DESIGN GUIDE FOR BEST PRACTICES
AND COORDINATE DIRECTLY WITH RELEVANT UTILITY PROVIDERS FOR REQUIREMENTS. SEE
UTILITY CROSSINGS (GC 2.1 - GC 2.12) AND UTILITY CONFLICTS (GC 4.1 - GC 4.4).
9. FREEBOARD REQUIREMENTS SHOWN SHOULD BE USED AS GUIDELINES BUT THE DESIGNER
SHALL REFER TO THE C.3 TECHNICAL GUIDANCE MANUAL FOR ADDITIONAL FREEBOARD
REQUIREMENTS, ESPECIALLY WHERE THE BIORETENTION BASIN IS LOCATED IN A SUMP AND
DEPENDS ON OUTFLOW THROUGH AN OVERFLOW STRUCTURE/CATCH BASIN.
DESIGNER CHECKLIST
(MUST SPECIFY, AS APPLICABLE):
FACILITY WIDTH, LENGTH, SLOPES (INCLUDING
SIDE, CROSS, AND LONGITUDINAL), AND SHAPE
DEPTH OF BIOTREATMENT SOIL
DEPTH AND TYPE OF GRAVEL STORAGE, IF ANY
PLANTER SURFACE ELEVATION (TOP OF
BIOTREATMENT SOIL) AT UPSLOPE AND
DOWNSLOPE ENDS OF FACILITY
CONTROL POINTS AT EVERY CORNER OF
FACILITY AND POINT OF TANGENCY
DIMENSIONS AND DISTANCE TO EVERY INLET,
OUTLET, CHECK DAM, SIDEWALK NOTCH, ETC.
ELEVATIONS OF EVERY INLET, OUTLET,
STRUCTURE RIM AND INVERT, CHECK DAM,
AND SIDEWALK NOTCH
TYPE AND DESIGN OF FACILITY COMPONENTS
(E.G., EDGE TREATMENTS, INLETS/GUTTER
MODIFICATIONS, UTILITY CROSSINGS, LINER,
AND PLANTING DETAILS)
-BC
1.1
BC
1.12
-BC
2.1
BC
2.6
-BC
3.1
BC
3.4
GC
1.2
BC
4.1
GC
1.1
GC
5.1
-GC
3.1
GC
3.3
LAYOUT REQUIREMENTS:
1.FOR RIGHT-OF-WAY APPLICATIONS, REFER TO THE SMC DPW STANDARD DRAWINGS AND
SPECIFICATIONS FOR CONSTRUCTION FOR COURTESY STRIP, THROUGHWAY, PARKING
SPACE AND ACCESSIBLE PATH REQUIREMENTS.
2. LOCATE CURB CUTS AND GUTTER MODIFICATIONS TO AVOID CONFLICTS WITH
ACCESSIBILITY REQUIREMENTS (E.G., LOCATE OUTSIDE OF CROSSWALKS).
RELATED SPECIFICATIONS
BIORETENTION:
BIOTREATMENT SOIL MIXPER BASMAA
SPECIFICATIONS (SEE SMCWPPP C.3 REGULATED
PROJECTS GUIDE APPENDIX K)
BB
2.1.1
BB
1.1
BB
2.1
BB
2.2
BB
2.3
BB
2.4
GC
4.3
GC
4.1
-GC
2.1
GC
2.12
BC
6.2
BC
6.1
BC
5.2
BC
5.1
BC
1.1
BC
1.7
18" (MIN)
12" (MIN)
DESIGNER TO SPECIFY
PONDING ELEVATION
ROADWAY WITHOUT PARKING
1' (MIN)
1"
BIOTREATMENT SOIL
SCARIFIED AND UNCOMPACTED
SUBGRADE, SEE NOTES 1 & 2
COMPACTED NATIVE SOIL,
SEE NOTE 3
EDGE CONNECTION VARIES -
ENGINEER TO DESIGN
1
3 MAX
5% (MAX)
ANGLE OF REPOSE
1' (MIN) BOTTOM WIDTH
2" - 6" (MIN) FREEBOARD, SEE REGULATED
PROJECTS GUIDE FOR ADDITIONAL INFORMATION
OPTIONAL PLANTER
SIDESLOPE BETWEEN CURB
CUTS, SEE DESIGNER NOTES
2' (MIN)
CONSTRUCTION NOTES:
1. AVOID COMPACTION OF EXISTING SUBGRADE BELOW BASIN.
2. SCARIFY SUBGRADE TO A DEPTH OF 3 INCHES (MIN) IMMEDIATELY PRIOR TO PLACEMENT OF AGGREGATE
STORAGE AND BIOTREATMENT SOIL MATERIALS.
3. COMPACT SOIL IMMEDIATELY BEHIND CURB TO 90% OF MAXIMUM DENSITY PER STANDARD PROCTOR TEST (ASTM
D698).
4. UNDERDRAIN REQUIRED FOR ALL FACILITIES WITH IMPERMEABLE LINER.
5. PROVIDE ONE CLEANOUT PER PLANTER (MIN) FOR FACILITIES WITH UNDERDRAINS.
6. MINIMUM UTILITY SETBACKS AND PROTECTION MEASURES MUST CONFORM TO CURRENT JURISDICTION
PROTECTION STANDARDS. COORDINATE WITH ENGINEER IN THE EVENT OF UTILITY CROSSING AND UTILITY
CONFLICTS.
7. GEOTECHNICAL OR HYDROLOGIST ENGINEER TO DETERMINE IF LINER SHALL BE USED.
8. ANGLE OF REPOSE MAY VARY BASED ON GEOTECHNICAL ENGINEER RECOMMENDATIONS.
AGGREGATE STORAGE, SEE BC
4.1
6"-12"
GC
5.1
OPTIONAL UNDERDRAIN
WITH CLEANOUT, SEE
NOTES 4 & 5, AND BC
5.1
OPTIONAL IMPERMEABLE
LINER, SEE GC
1.2
MULCH
ENERGY DISSIPATION
GC
1.1
BC
5.2
CURB CUT BEHIND
FOR EDGE TREATMENT
OPTIONS, SEE
GREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
2.1
BB
FILE NO.
BB
2.1.1
BB
1.1
BB
2.1
BB
2.2
BB
2.3
BB
2.4
BIORETENTION BASINGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
2.1
BB
FILE NO.
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2.1.1
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1.1
BB
2.1
BB
2.2
BB
2.3
BB
2.4
12" (MIN)
DESIGNER TO SPECIFY
PONDING ELEVATION
ROADWAY WITHOUT PARKING
BC
1.2.1
FOR EDGE TREATMENT
OPTIONS, SEE 1' (MIN)
1"
BIOTREATMENT SOIL
SCARIFIED AND
UNCOMPACTED
SUBGRADE,
SEE NOTES 1 & 2
COMPACTED NATIVE SOIL,
SEE NOTE 3
EDGE CONDITION VARIES -
ENGINEER TO DESIGN
1
3 MAX
5% (MAX)
ANGLE OF REPOSE
1' (MIN) BOTTOM WIDTH
2"- 6" (MIN) FREEBOARD. SEE REGULATED
PROJECTS GUIDE FOR ADDITIONAL INFORMATION
OPTIONAL PLANTER
SIDESLOPE BETWEEN CURB
CUTS, SEE DESIGNER NOTES 2' (MIN)
CALTRANS CLASS 2 PERMEABLE
AGGREGATE (NON-RECYCLED) STORAGE
6"-12"
GC
5.1
OPTIONAL UNDERDRAIN
WITH CLEANOUT, SEE
NOTES 4 & 5, AND BC
5.1
OPTIONAL IMPERMEABLE
LINER, SEE GC
1.2
3" MULCHENERGY DISSIPATION
GC
1.1
BC
5.2
MATERIALS AND
WIDTH VARIES
PER SITE
CONDITIONS
AND USE
CURB CUT BEHIND
CONSTRUCTION NOTES:
1. AVOID COMPACTION OF EXISTING SUBGRADE BELOW BASIN.
2. SCARIFY SUBGRADE TO A DEPTH OF 3 INCHES (MIN) IMMEDIATELY PRIOR TO PLACEMENT OF AGGREGATE STORAGE AND
BIOTREATMENT SOIL MATERIALS.
3. COMPACT SOIL IMMEDIATELY BEHIND CURB TO 90% OF MAXIMUM DENSITY PER STANDARD PROCTOR TEST (ASTM D698).
4. UNDERDRAIN REQUIRED FOR ALL FACILITIES WITH IMPERMEABLE LINER.
5. PROVIDE ONE CLEANOUT PER PLANTER (MIN) FOR FACILITIES WITH UNDERDRAINS.
6. MINIMUM UTILITY SETBACKS AND PROTECTION MEASURES MUST CONFORM TO CURRENT JURISDICTION PROTECTION
STANDARDS. COORDINATE WITH ENGINEER IN THE EVENT OF UTILITY CROSSING AND UTILITY CONFLICTS.
7. GEOTECHNICAL OR HYDRAULOGIST ENGINEER TO DETERMINE IF LINER SHALL BE USED.
8. ANGLE OF REPOSE MAY VARY BASED ON GEOTECHNICAL ENGINEER RECOMMENDATIONS.
18" (MIN)
BC
1.1
BIORETENTION BASINGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
2.1.1
BB
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2.1.1
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1.1
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2.1
BB
2.2
BB
2.3
BB
2.4
18" (MIN)
12" (MIN)
DESIGNER TO SPECIFY
PONDING ELEVATION
1' (MIN)
1"
BIOTREATMENT SOIL
SCARIFIED AND UNCOMPACTED
SUBGRADE, SEE NOTES 1 & 2
SIDEWALK OR
LANDSCAPING
ANGLE OF REPOSE
1' (MIN) BOTTOM WIDTH
6" (MIN) FREEBOARD
CONSTRUCTION NOTES:
1. AVOID COMPACTION OF EXISTING SUBGRADE BELOW BASIN.
2. SCARIFY SUBGRADE TO A DEPTH OF 3 INCHES (MIN) IMMEDIATELY PRIOR TO PLACEMENT OF AGGREGATE
STORAGE AND BIOTREATMENT SOIL MATERIALS.
3. UNDERDRAIN REQUIRED FOR ALL FACILITIES WITH IMPERMEABLE LINER.
4. PROVIDE ONE CLEANOUT PER PLANTER (MIN) FOR FACILITIES WITH UNDERDRAINS.
5. MINIMUM UTILITY SETBACKS AND PROTECTION MEASURES MUST CONFORM TO CURRENT SMC ASSET
PROTECTION STANDARDS AND OTHER UTILITY PROVIDER REQUIREMENTS. COORDINATE WITH ENGINEER IN THE
EVENT OF UTILITY CROSSING AND UTILITY CONFLICTS.
AGGREGATE STORAGE, SEE BC
4.1
12" MAX
GC
5.1
OPTIONAL UNDERDRAIN
WITH CLEANOUT, SEE
NOTES 3 & 4, AND BC
5.1
OPTIONAL IMPERMEABLE
LINER, SEE GC
1.2
MULCH
GC
1.1
BC
5.2
BC
3.4
OPTIONAL OVERFLOW
STRUCTURE, SEE
BC
3.1
1"
SIDEWALK OR
LANDSCAPING
1
1
5% (MAX)5% (MAX)
BIORETENTION BASINGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
2.2
BB
FILE NO.
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2.1.1
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1.1
BB
2.1
BB
2.2
BB
2.3
BB
2.4
>>>>>>>>
CONC. VALLEY
GUTTER
BEGIN TRANSITION
TO CURB & GUTTER
CONCRETE
VALLEY GUTTER
TRANSITION BACK TO
VALLEY GUTTER
INFLOW
CURB CUT INLET,
SEE BC
2.2
CURB CUT INLET
AND OUTLET, SEE BC
3.2
ROADWAY
LANDSCAPE OR
PAVEMENT OUTSIDE
OF RIGHT-OF-WAY
SMC STANDARD CURB & GUTTER,
GUTTER WIDTH EQUAL TO HALF OF
ADJOINING VALLEY GUTTER WIDTH
A
BB
2
.
4
PARKING
STRIP
PARKING
STRIP
3:1 SLOPE DOWN
TO BASIN BOTTOM OPTIONAL OVERFLOW
STRUCTURE SEE BC
3.1
OPTIONAL UNDERDRAIN
AND CLEANOUT, SEE
BC
5.1
GC
5.1
BC
3.4
BC
5.2
CONCRETE CURB
W/O GUTTER PER
CITY STANDARDS
45-DEGREE TAPER
AT END OF CURB
OVERFLOW
OPTIONAL FENCE,
SEE BC
1.9
BC
1.8
BIORETENTION BASINGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
2.3
BB
FILE NO.
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2.1.1
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1.1
BB
2.1
BB
2.2
BB
2.3
BB
2.4
2' (MIN)1' MIN BOTTOM
WIDTH
12" (MIN)
2" (MIN)
FREEBOARD
ROADWAY
WITHOUT PARKING
SCARIFIED AND
UNCOMPACTED
SUBGRADE, SEE
NOTES 1 & 2
DESIGNER TO SPECIFIY PONDING ELEVATION
COMPACTED NATIVE SOIL,
SEE NOTE 3
STANDARD CURB
AND GUTTER
1' BENCH (MIN)
1
1
LANDSCAPE OR PAVEMENT
OUTSIDE OF RIGHT-OF-WAY
BIOTREATMENT SOIL MEDIA
SECTION A A
BIORETENTION
PLANTING SPECIFIED
BY DESIGNER
ENERGY DISSIPATION
6"-12"
5.5' (TYP), MIN PLANTER WIDTH
SPLASH PAD
CONSTRUCTION NOTES:
1. AVOID COMPACTION OF EXISTING SUBGRADE BELOW BASIN.
2. SCARIFY SUBGRADE TO A DEPTH OF 3 INCHES (MIN) IMMEDIATELY PRIOR TO PLACEMENT OF AGGREGATE
STORAGE AND BIORETENTION SOIL MATERIALS.
3. COMPACT NATIVE SOIL IMMEDIATELY BEHIND CURB TO 90% OF MAXIMUM DENSITY PER STANDARD PROCTOR
TEST (ASTM D698).
4. UNDERDRAIN REQUIRED FOR ALL FACILITIES WITH IMPERMEABLE LINER AND PLACED 1 INCH ABOVE BOTTOM
OF AGGREGATE SECTION.
5. PROVIDE ONE CLEANOUT PER PLANTER (MIN) FOR FACILITIES WITH UNDERDRAINS.
6. MINIMUM UTILITY SETBACKS AND PROTECTION MEASURES MUST CONFORM TO CURRENT JURISDICTIONAL
ASSET PROTECTION STANDARDS. COORDINATE WITH ENGINEER IN THE EVENT OF UTILITY CROSSING AND
UTILITY CONFLICTS.
7. GEOTECHNICAL OR HYDRAULOGIST ENGINEER TO DETERMINE IF LINER SHALL BE USED.
8. ANGLE OF REPOSE MAY VARY BASED ON GEOTECHNICAL ENGINEER RECOMMENDATIONS.
EDGE OF GUTTER TO ALIGN
WITH EDGE OF VALLEY
GUTTER UPSTREAM AND
DOWNSTREAM
7' (TYP)
1
3 MAX
OPTIONAL FENCE,
SEE BC
1.8
18" (MIN)
3" MULCH
AGGREGATE STORAGE, SEE BC
4.1GC
5.1
OPTIONAL UNDERDRAIN
WITH CLEANOUT, SEE
NOTES 4 & 5, AND BC
5.1
BC
5.2
ANGLE OF REPOSE
OPTIONAL IMPERMEABLE
LINER, SEE GC
1.1
GC
1.2
BC
1.9
BIORETENTION BASINGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
2.4
BB
FILE NO.
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2.1.1
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1.1
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2.1
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2.2
BB
2.3
BB
2.4
BIORETENTION COMPONENTSGREEN INFRASTRUCTURE
TYPICAL DETAILS 1.1
BC
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PURPOSE:
EDGE TREATMENTS ARE USED TO DEFINE THE BOUNDARIES OF A BIORETENTION FACILITY AND ARE
INTENDED PRIMARILY TO STABILIZE THE EDGE OF ADJACENT PAVEMENT AND MINIMIZE LATERAL
MOVEMENT OF WATER, AS APPLICABLE. IN CASES WHERE ADEQUATE SPACE IS AVAILABLE, THE
FACILITY SIDESLOPE CAN BE LAID BACK SUCH THAT THE SURROUNDING NATIVE SOIL IS STABLE AND
CAN FUNCTION AS THE FACILITY EDGE TREATMENT. HOWEVER, WHEN SPACE IS LIMITED, EDGE
TREATMENTS SUCH AS VERTICAL WALLS MAY BE USED TO MAINTAIN THE STRUCTURAL INTEGRITY OF
THE SURROUNDING SURFACES. THESE EDGE TREATMENTS RETAIN STORMWATER WITHIN THE
FACILITY (AND OUT OF THE SURROUNDING PAVEMENT SECTIONS, AS APPLICABLE) UNTIL WATER
INFILTRATES, IS COLLECTED BY THE UNDERDRAIN, OR OVERFLOWS VIA THE DESIGNATED OUTLETS.
DESIGNER NOTES & GUIDELINES:
1. THE DESIGNER MUST ADAPT DRAWINGS TO ADDRESS SITE-SPECIFIC CONDITIONS.
2. MINIMUM EDGE TREATMENT EMBEDMENT DEPTHS ARE SPECIFIED TO PREVENT LATERAL SEEPAGE
UNDER THE EDGE TREATMENT AND INTO ADJACENT PAVEMENT SECTIONS, AS APPLICABLE.
3. DESIGNER MAY ELIMINATE CONSTRUCTION BENCH TO INCREASE EFFECTIVE FACILITY AREA (I.E.
INFILTRATION AND STORAGE FOOTPRINT) PROVIDED PLANTER WALL EXTENDS TO BOTTOM OF
AGGREGATE STORAGE.
4. DESIGNER MAY SPECIFY ALTERNATIVE MATERIAL TYPE FOR EDGE TREATMENTS PROVIDED
MATERIAL MEETS STRUCTURAL REQUIREMENTS FOR LOADING CONDITIONS, SERVES AS A WATER
BARRIER BETWEEN THE FACILITY AND ADJACENT PAVEMENT SECTIONS (AS APPLICABLE), AND
COMPLIES WITH SMC DPW STANDARD ACCESSIBILITY REQUIREMENTS.
5. FOOTING OR LATERAL BRACING SHALL BE PROVIDED FOR ALL PLANTER WALLS UNLESS THE
DESIGNER DEMONSTRATES THAT THE PROPOSED WALL DESIGN MEETS LOADING REQUIREMENTS.
6. FOOTINGS AND LATERAL BRACING SHALL BE DESIGNED TO WITHSTAND ANTICIPATED LOADING
ASSUMING NO REACTIVE FORCES FROM THE UNCOMPACTED BIOTREATMENT SOIL WITHIN THE
FACILITY.
7. LATERAL BRACING SHALL MEET HYDROLOGIC AND HYDRAULIC DESIGN REQUIREMENTS FOR CHECK
DAMS WHEN USED AS CHECK DAMS. SEE BC 6.1 AND BC 6.2.
8. PLANTER WALLS EXTENDING MORE THAN 36 INCHES BELOW ADJACENT LOAD-BEARING SURFACE,
OR WHEN LOCATED ADJACENT TO PAVERS, MUST HAVE FOOTING OR LATERAL BRACING. SEE BC 1.5
DESIGNER CHECKLIST (MUST SPECIFY, AS APPLICABLE):
EDGE TREATMENT TYPE AND MATERIAL
EDGE TREATMENT WIDTH AND HEIGHT
EMBEDMENT DEPTH INTO SUBGRADE SOILS
LATERAL BRACING/FOOTING REQUIREMENTS
PIPE MATERIAL AND DIAMETER FOR ALL WALL PENETRATIONS
WATER TIGHT CONNECTOR TYPE FOR ALL WALL PENETRATIONS (E.G.,
GROUTED, COMPRESSION, BOOT) SEE GC 2.10 AND GC 2.11.
ELEVATIONS - INLET, OUTLET, OVERFLOW STRUCTURE (RIM & INVERT),
CLEANOUT (RIM & INVERT)
ELEVATIONS - TOP OF SLOPE AND TOE OF SLOPE
STANDARD CURB EDGE AT BIORETENTION BASIN 1
2' (MIN)
1
3
ROADWAY
WITHOUT PARKING
COMBINED CURB AND
PARKING STRIP OR
GUTTER PER SMC DPW
STD D-3
DESIGN PONDING EQUAL
TO ELEVATION OF OUTLET
ANGLE OF REPOSE
SEE NOTE 3
COMPACTED NATIVE SOIL. SURFACE CONDITION
VARIES DEPENDING UPON ADJACENT ROADWAY USE.
WHERE ADJACENT TO PARKING AN ADA ACCEPTABLE
SURFACE AND STEP OUT WIDTH IS REQUIRED AS PER
MUNICIPAL ENGINEER DIRECTION.
6"
BIOTREATMENT AREA
1
X
5% (MAX)
BB
2.1
BB
2.1.1
BB
2.2
BIORETENTION COMPONENTSGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
1.2
BC
FILE NO.
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CONSTRUCTION NOTES:
1. ALL MATERIAL AND WORKMANSHIP FOR EDGE TREATMENTS SHALL
CONFORM TO STANDARD SPECIFICATIONS AND APPLICABLE CODES
PER RESPONSIBLE JURISDICTION.
2. COMPACT NATIVE SOIL TO 90% OF MAXIMUM DENSITY PER STANDARD
PROCTOR TEST (ASTM D698). TRANSITION TO STANDARD
BIOTREATMENT SOIL SECTION UPSLOPE OF DESIGN PONDING
ELEVATION.
3. ANGLE OF REPOSE VARIES PER GEOTECHNICAL ENGINEER
RECOMMENDATIONS.
BC
1.1
BC
1.2
BC
1.3
BC
1.4
BC
1.5
BC
1.6
BC
1.7
BC
1.2.1
BC
1.8
BC
1.9
BC
1.10
BC
1.11
BC
1.12
BC
1.13
BC
1.5.1
BC
1.5.2
ALTERNATIVE EDGE OF
BIOTREATMENT SOIL
BIOTREATMENT SOIL
STANDARD CURB EDGE AT BIORETENTION AREA 1
2' (MIN)
1
3
ROADWAY WITHOUT PARKING
STANDARD CURB AND GUTTER OR
ROADWAY CONDITION AS PER
MUNICIPAL ENGINEER DIRECTION
DESIGN PONDING EQUAL
TO ELEVATION OF OUTLET
CONDITION VARIES DEPENDING
UPON ADJACENT ROADWAY USE.
WHERE ADJACENT TO PARKING AN
ADA ACCEPTABLE SURFACE AND STEP
OUT WIDTH IS REQUIRED AS PER
MUNICIPAL ENGINEER DIRECTION
2 - 6" (MIN)
ANGLE OF REPOSE
SEE NOTE 3
BIOTREATMENT
SOIL OR
ALTERNATIVE
BACKFILL WITH
NATIVE SOIL,
SEE NOTE 2
BB
2.1
BB
2.1.1
BB
2.2
BIORETENTION AREA, SEE
1
1
5% (MAX)
BIORETENTION COMPONENTSGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
1.2.1
BC
FILE NO.
CONSTRUCTION NOTES:
1. ALL MATERIAL AND WORKMANSHIP FOR EDGE TREATMENTS SHALL CONFORM TO
STANDARD SPECIFICATIONS AND APPLICABLE CODES PER RESPONSIBLE JURISDICTION.
2. COMPACT NATIVE SOIL TO 90% OF MAXIMUM DENSITY PER STANDARD PROCTOR TEST
(ASTM D698). TRANSITION TO STANDARD BIOTREATMENT SOIL SECTION UPSLOPE OF
DESIGN PONDING ELEVATION.
3. ANGLE OF REPOSE VARIES PER GEOTECHNICAL ENGINEER RECOMMENDATIONS.
BC
1.1
BC
1.2
BC
1.3
BC
1.4
BC
1.5
BC
1.6
BC
1.7
BC
1.2.1
BC
1.8
BC
1.9
BC
1.10
BC
1.11
BC
1.12
BC
1.13
BC
1.5.1
BC
1.5.2
3" (MIN) COVER,
SEE NOTE 3
CONSTRUCTION NOTES:
1. ALL MATERIAL, REINFORCEMENT AND WORKMANSHIP FOR EDGE
TREATMENTS SHALL CONFORM TO SMC DPW STANDARD
SPECIFICATIONS AND APPLICABLE CODES.
2. ALL PLANTER WALLS SHALL EXTEND TO BOTTOM OF BIOTREATMENT
SOIL OR DEEPER.
3. CONTRACTOR TO PROVIDE 3 INCH MINIMUM COVER OVER ALL
LATERAL BRACING FOR PLANT ESTABLISHMENT.
4. ALL CONSTRUCTION COLD JOINTS SHALL INCORPORATE EPOXY,
DOWEL/TIE BAR, KEYWAY, OR WATER STOP.
5. DETAIL NOT TO BE USED WITHIN COUNTY RIGHT-OF-WAY.
SIDEWALK / PLAZA
LATERAL BRACING
(TYP), SEE BC
1.6
EXPANSION JOINT
PER DPW APPROVAL
CONCRETE PLANTER WALL
BC
1.7
PLANTER WALL WITH LATERAL BRACING 1
3" (MIN) COVER,
SEE NOTE 3
ROADWAY WITHOUT
PARKING
SIDEWALK /
PLAZA
LATERAL BRACING,
SEE BC
1.6
BC
1.7
6" WIDE BENCH FOR WALL
CONSTRUCTION (TYP)
PLANTER WALL WITH CONTINUOUS FOOTING 2
10"
DESIGN PONDING
ELEVATION (TYP)
SHORT WALL
EXTENDED WALL
EXPANSION JOINT
PER DPW APPROVALCONCRETE
PLANTER WALL
EXPANSION JOINT
PER DPW APPROVAL
CONCRETE PLANTER WALL
WITH CONTINUOUS FOOTINGCOMBINED CURB AND
PARKING STRIP OR
GUTTER PER SMC STD D-3
WITH MONOLITHIC WALL
EXTENSION, SEE NOTE 2
ROADWAY WITHOUT
PARKING
COMBINED CURB AND PARKING
STRIP OR GUTTER PER SMC
STD D-3 WITH MONOLITHIC
WALL EXTENSION, SEE NOTE 2
ROADWAY
WITHOUT PARKING
#4 @ 12" O.C.
(HOR), (3) MIN
#4 @ 12" O.C. (VERT) @ ℄
10' (MAX)6"
10' (MAX)6"
#4 @ 12" O.C.
(HOR), (3) MIN
#4 @ 12" O.C.
(VERT) @ ℄
#4 @ 16" O.C.
(HOR), (3) MIN
#4 @ 16" O.C. (VERT)
@ SOIL FACE
6"
3' - 6"
4' (MAX)
(4) #4 @ 14" O.C.
(HOR), CONT
SEE NOTE 4
SEE NOTE4
SEE NOTE 4
BIORETENTION COMPONENTSGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
1.3
BC
FILE NO.
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BC
1.1
BC
1.2
BC
1.3
BC
1.4
BC
1.5
BC
1.6
BC
1.7
BC
1.2.1
BC
1.8
BC
1.9
BC
1.10
BC
1.11
BC
1.12
BC
1.13
BC
1.5.1
BC
1.5.2
PLANTER WALL - PARCEL ONLY 1 PLANTER WALL WITH CONTINUOUS FOOTING 2
CONSTRUCTION NOTES:
1. ALL MATERIAL, REINFORCEMENT AND WORKMANSHIP FOR EDGE
TREATMENTS SHALL CONFORM TO SMC DPW STANDARD SPECIFICATIONS
AND APPLICABLE CODES.
2. PLANTER WALLS EXTENDING MORE THAN 36 INCHES BELOW ADJACENT
LOAD-BEARING SURFACE, OR WHEN LOCATED ADJACENT TO PAVERS, MUST
HAVE FOOTING OR LATERAL BRACING. COORDINATE WITH ENGINEER.
3. ALL PLANTER WALLS SHALL EXTEND TO BOTTOM OF BIOTREATMENT SOIL OR
DEEPER.
4. ALL CONSTRUCTION COLD JOINTS SHALL INCORPORATE EPOXY, DOWEL/TIE
BAR, OR WATER STOP.
36" (MAX),
SEE NOTE 2
10"
SIDEWALK / PLAZASIDEWALK / PLAZA
CONCRETE PLANTER
WALL, SEE NOTE 3
6" WIDE BENCH FOR
WALL CONSTRUCTION
18" x 9" #4 @ 18" O.C.
#4 @ 18" O.C. (VERT) @ ℄
EXPANSION JOINT
PER SMC DPW EXPANSION JOINT
PER SMC DPW APPROVAL
CONCRETE PLANTER WALL
WITH CONTINUOUS FOOTING
DESIGN
PONDING
ELEVATION
6"
#4 @ 18" O.C. (HOR), (3) MIN
6"
4' (MAX)
3' - 6"
#4 @ 16" O.C.
(HOR), (3) MIN
#4 @ 16" O.C.
(VERT) @
SOIL FACE
(4) #4 CONTSEE NOTE 4
(2" MIN)
(2" MIN)
DESIGN
PONDING
ELEVATION
BIORETENTION COMPONENTSGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
1.4
BC
FILE NO.
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BC
1.1
BC
1.2
BC
1.3
BC
1.4
BC
1.5
BC
1.6
BC
1.7
BC
1.2.1
BC
1.8
BC
1.9
BC
1.10
BC
1.11
BC
1.12
BC
1.13
BC
1.5.1
BC
1.5.2
PLANTER WALL WITH LATERAL BRACING - EXTENDED 2
3" (MIN) COVER,
SEE NOTE 3
SIDEWALK / PLAZA
LATERAL BRACING,
SEE BC
1.6
BC
1.7
EXPANSION JOINT
PER DPW
APPROVAL (TYP)
CONCRETE
PLANTER WALL
(TYP), SEE NOTE 2
SIDEWALK / PLAZA
LATERAL BRACING,
SEE BC
1.6
BC
1.7
6" WIDE BENCH
FOR WALL
CONSTRUCTION
(TYP)
CONSTRUCTION NOTES:
1. ALL MATERIAL, REINFORCEMENT AND WORKMANSHIP FOR EDGE
TREATMENTS SHALL CONFORM TO SMC DPW STANDARD SPECIFICATIONS
AND APPLICABLE CODES.
2. ALL PLANTER WALLS SHALL EXTEND TO BOTTOM OF BIOTREATMENT SOIL OR
DEEPER.
3. CONTRACTOR TO PROVIDE 3 INCH MINIMUM COVER OVER ALL LATERAL
BRACING FOR PLANT ESTABLISHMENT.
4. ALL CONSTRUCTION COLD JOINTS SHALL INCORPORATE EPOXY, DOWEL/TIE
BAR, AND WATER STOP.
SHORT WALL EXTENDED WALL
EXPANSION JOINT
PER DPW
APPROVAL (TYP)
DESIGN PONDING ELEVATION
3" (MIN) COVER,
SEE NOTE 3
10' (MAX)6"
CONCRETE
PLANTER WALL
(TYP), SEE NOTE 2
DESIGN PONDING ELEVATION
10' (MAX)6"
#4 @ 12" O.C.
(HOR), (3) MIN
#4 @ 12" O.C.
(VERT) @ ℄
#4 @ 12" O.C.
(HOR), (3) MIN
#4 @ 12" O.C.
(VERT) @ ℄
(2" MIN)2" (MIN)
PLANTER WALL WITH LATERAL BRACING -SHORT 1
BIORETENTION COMPONENTSGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
1.5
BC
FILE NO.
N
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BC
1.1
BC
1.2
BC
1.3
BC
1.4
BC
1.5
BC
1.6
BC
1.7
BC
1.2.1
BC
1.8
BC
1.9
BC
1.10
BC
1.11
BC
1.12
BC
1.13
BC
1.5.1
BC
1.5.2
12" (MIN)
1' (MIN)
SCARIFIED AND
UNCOMPACTED
SUBGRADE
ADJACENT SIDEWALK OR
LANDSCAPING SLOPED
TOWARDS PLANTER
FILTER FABRIC
6" (MIN)
NOTES:
1. IF ADDITIONAL TREE ROOT VOLUME IS NEEDED FOR TREES PLANTED WITHIN THE BIORETENTION
PLANTER, THE DESIGNER MAY SPECIFY THE USE OF STRUCTURAL SOIL OR SILVA CELLS UNDER THE
STABILIZED SLOPE AND/OR SIDEWALK BASE WITH APPROVAL FROM GEOTECHNICAL ENGINEER AND
SMC DPW.
2. IF THERE IS A RISK OF EROSION ADJACENT TO A WIDE SIDEWALK/PLAZA, COBBLES SHALL BE USED IN
LIEU OF LANDSCAPING TO PROVIDE ENERGY DISSIPATION AND EROSION PROTECTION. BUFFER AREA
SHALL BE DESIGNED AND MAINTAINED TO ALLOW FOR FREE FLOW OF RUNOFF FROM ADJACENT
SURFACE INTO PLANTER.
3. IF SPACE CONSTRAINTS REQUIRE REDUCED WIDTH, A STEEPER SLOPE AND VERTICAL WALL EDGE
RESTRAINT WITH RAISED CURB AT SIDEWALK MAY BE USED, SUBJECT TO APPROVAL BY
GEOTECHNICAL ENGINEER.
4. REFER TO SMCWPPP GI DESIGN GUIDE FOR ADDITIONAL DESIGN GUIDANCE.
6" DEEP CLEAN AGGREGATE
INFILL (2"-4" DIA.)1
1.5
1
1.5
LANDSCAPE BUFFER OR
COBBLES, SEE NOTE 2
SINGLE COURSE OF
BOULDERS (6"-12" DIA.)
MAX. SLOPE TO BE
DETERMINED BY
GEOTECHNICAL
ENGINEER
BIORETENTION
PLANTER, SEE
BB
2.1
BB
2.2
WIDTH VARIES,
SEE NOTE 3
BIOTREATMENT SOIL
CLASS 2 PERMEABLE AGGREGATE
COMPACTED SUBGRADE, SEE NOTE 1
ANGLE OF REPOSE PER GEOTECHNICAL
ENGINEERS RECOMMENDATION
3" (MIN)
MULCH
18" (MIN)
BC
4.1
BIORETENTION COMPONENTSGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
1.5.1
BC
FILE NO.
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BC
1.1
BC
1.2
BC
1.3
BC
1.4
BC
1.5
BC
1.6
BC
1.7
BC
1.2.1
BC
1.8
BC
1.9
BC
1.10
BC
1.11
BC
1.12
BC
1.13
BC
1.5.1
BC
1.5.2
18" (MIN)
12" (MIN)
SCARIFIED AND
UNCOMPACTED
SUBGRADE
ADJACENT SIDEWALK
CONCRETE PLANTER WALL PER DETAIL 1,
NOTES:
1. IF ADDITIONAL TREE ROOT VOLUME IS NEEDED FOR TREES PLANTED WITHIN THE BIORETENTION
PLANTER, DESIGNER MAY SPECIFY THE USE OF STRUCTURAL SOIL OR SILVA CELLS UNDER THE
STABILIZED SLOPE AND/OR SIDEWALK BASE WITH APPROVAL FROM GEOTECHNICAL ENGINEER
AND SMC DPW.
2. PROVIDE 12" (MIN) DEPTH OF BIOTREATMENT SOIL IMMEDIATELY ADJACENT TO PLANTER WALL.
PLANTER MAY BE GRADED WITH 3:1 (MAX) SLOPED SIDES TO PROVIDE THIS 12" (MIN) SOIL DEPTH
AND DECREASE THE OVERALL DEPTH OF THE CONCRETE PLANTER WALL. THE CONCRETE
PLANTER WALL SHALL ALWAYS EXTEND BELOW THE BOTTOM OF THE DRAINAGE COURSE LAYER
BELOW THE SIDEWALK PAVEMENT TO PREVENT WATER WITHIN THE PLANTER FROM MIGRATING
UNDER THE SIDEWALK.
3. REFER TO SMCWPPP GI DESIGN GUIDE FOR ADDITIONAL DESIGN GUIDANCE.
4. SINCE COMPACTED BIORETENTION SOIL WILL NOT PROVIDE ADEQUATE RESISTANCE TO LATERAL
LOADS PLACED ON THE ADJACENT SIDEWALK, SHORTENED PLANTER WALLS SHALL BE TIED INTO
THE ADJACENT SIDEWALK TO PREVENT ROTATION OR SHIFTING OF THE WALL. ALL MATERIAL,
REINFORCEMENT AND WORKMANSHIP FOR EDGE TREATMENTS SHALL CONFORM TO SMC DPW
STANDARD SPECIFICATIONS AND APPLICABLE CODES.
1
1.5
EXPANSION JOINT AND
REINFORCEMENT CONNECTION TO
CONCRETE SIDEWALK, SEE NOTE 4
BIORETENTION
PLANTER, SEE
ANGLE OF REPOSE PER GEOTECHNICAL
ENGINEERS RECOMMENDATION
6"
EMBED IMPERMEABLE LINER
3" (MIN) INTO NATIVE SOIL
BB
2.1
BB
2.2
3" (MIN) MULCH
BC
1.412" (MIN) WIDE COMPACTED
NATIVE SOIL BENCH UNDER
CONCRETE PLANTER WALL,
SEE NOTE 1
12" (MIN), SEE NOTE 2
BIOTREATMENT SOIL BC
4.1
BIORETENTION COMPONENTSGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
1.5.2
BC
FILE NO.
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ID
BC
1.1
BC
1.2
BC
1.3
BC
1.4
BC
1.5
BC
1.6
BC
1.7
BC
1.2.1
BC
1.8
BC
1.9
BC
1.10
BC
1.11
BC
1.12
BC
1.13
BC
1.5.1
BC
1.5.2
-BC
1.2
BC
1.5
A-
CONCRETE BRACING WALL - SHORT 1
B-
6" (MIN)
12" (MIN)
TOP OF SIDEWALK
TOP OF RAISED
PLANTER WALL
DESIGN PONDING
ELEVATION
TOP OF SIDEWALK
TOP OF RAISED PLANTER WALL
DESIGN PONDING ELEVATION
CONSTRUCTION NOTES:
1. ALL MATERIAL, REINFORCEMENT
AND WORKMANSHIP FOR LATERAL
BRACING SHALL CONFORM TO SMC
DPW STANDARD SPECIFICATIONS
AND APPLICABLE CODES.
2. CONCRETE LATERAL BRACING
SHALL BE CONTINUOUS (NO
JOINTS).
3. LATERAL BRACING SHALL BE
PROVIDED EVERY 6 FEET (MAX) FOR
WALLS UP TO 4 FEET IN HEIGHT AND
EVERY 4 FEET (MAX) FOR WALLS
BETWEEN 4 AND 6 FEET IN HEIGHT.
COUNTY APPROVAL IS REQUIRED
FOR CASES THAT REQUIRE
LATERAL BRACING.
4. THE EXTENDED WALL DETAIL IS FOR
CASES IN WHICH STORAGE VOLUME
NEEDS TO BE MAXIMIZED IN
CONSTRAINED CONDITIONS.
PLANTER WALL
REINFORCING
(TYP), SEE
SEE NOTES 2 & 3
3" (MIN)
OPTIONAL UNDERDRAIN,
SEE
3" COVER (MIN)
3" (MIN)
3" COVER (MIN)
BC
5.1
BC
5.2
6" WIDE BENCH FOR
WALL CONSTRUCTION
CONCRETE LATERAL BRACING
OR EQUAL, SEE NOTES 2 & 3
12" (MIN)
PLANTER WALL
REINFORCING
(TYP), SEE
SHORT WALL EXTENDED WALL
SECTION B
SECTION A
(1) #4 (TOP)
(1) #5 (BOT)
6" (MIN)
SEE NOTES 2 & 3
(2) #4 (TOP)
(2) #5 (BOT)
12" (MAX)
6' (MAX)
4' (MAX)
CONCRETE LATERAL
BRACING OR EQUAL,
SEE NOTES 2 & 3
(3) #5 @ SOIL FACE
@ EACH BRACE
(2) #5 @ SOIL FACE
@ EACH BRACE-BC
1.2
BC
1.5
6"10' (MAX)
(1) #5 (BOT), W/ 90°
HOOKS @ ENDS
(1) #4 (TOP), W/ 90°
HOOKS @ ENDS
(2) #5 (BOT), W/ 90°
HOOKS @ ENDS
(2) #4 (TOP), W/ 90°
HOOKS @ ENDS
6"10' (MAX)
LOCATE LATERAL
BRACING AT BOTTOM
OF WALL
LOCATE LATERAL BRACING 12"
(MAX) FROM BOTTOM OF WALL
DESIGN PONDING
ELEVATION
BOTTOM OF
PLANTER WALL
OPTIONAL
UNDERDRAIN
BOTTOM OF
PLANTER WALL
OPTIONAL
UNDERDRAIN
OPTIONAL
UNDERDRAIN, SEE BC
5.1
CONCRETE BRACING WALL - EXTENDED 2
BC
5.2
BIORETENTION COMPONENTSGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
1.6
BC
FILE NO.
N
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ID
BC
1.1
BC
1.2
BC
1.3
BC
1.4
BC
1.5
BC
1.6
BC
1.7
BC
1.2.1
BC
1.8
BC
1.9
BC
1.10
BC
1.11
BC
1.12
BC
1.13
BC
1.5.1
BC
1.5.2
CONCRETE STRUT 1
OPTIONAL UNDERDRAIN
TOP OF SIDEWALK
TOP OF RAISED
PLANTER WALL
DESIGN PONDING ELEVATION
6" DIA HDPE SDR 17 PIPE WITH
CONCRETE CORE OR EQUAL,
SEE NOTES 2, 3, & 4
CONSTRUCTION NOTES:
1. ALL MATERIAL, REINFORCEMENT AND WORKMANSHIP FOR
LATERAL BRACING STRUCTURES SHALL CONFORM TO SMC DPW
STANDARD SPECIFICATIONS AND APPLICABLE CODES.
2. LATERAL BRACING SHALL BE PROVIDED EVERY 6 FEET (MAX) FOR
WALLS UP TO 4 FEET IN HEIGHT.
3. OTHER MATERIALS MAY BE USED IN LIEU OF HDPE PROVIDED
MATERIAL IS NON CORROSIVE, NON-LEACHING, AND SCHEDULE
40.
4. PROVIDE 3 INCH CONTINUOUS SLOT ACROSS TOP OF PIPE TO
PLACE REINFORCEMENT AND ENSURE STRUT IS FREE OF VOIDS.
A-
OPTIONAL UNDERDRAIN,
SEE
3" (MIN)
BC
5.1
BC
5.2
3" (MIN)
6" DIA HDPE SDR 17 PIPE WITH
CONCRETE CORE OR EQUAL,
SEE NOTES 2, 3, & 4
-BC
1.2
BC
1.5
(1) #4, CENTERED
SECTION A
(1) #4, CENTERED W/ 90°
HOOKS @ ENDS
6"10' (MAX)
4' (MAX)
6"-12"
PLANTER WALL
REINFORCING (TYP), SEE
BOTTOM OF PLANTER WALL
BIORETENTION COMPONENTSGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
1.7
BC
FILE NO.
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BC
1.1
BC
1.2
BC
1.3
BC
1.4
BC
1.5
BC
1.6
BC
1.7
BC
1.2.1
BC
1.8
BC
1.9
BC
1.10
BC
1.11
BC
1.12
BC
1.13
BC
1.5.1
BC
1.5.2
TYPICAL FENCE
NOTES:
1. ALL MATERIAL, REINFORCEMENT AND WORKMANSHIP FOR EDGE TREATMENTS SHALL CONFORM TO SMC DPW
STANDARD SPECIFICATIONS, ADA REQUIREMENTS, AND OTHER APPLICABLE CODES.
2. DESIGNER TO SPECIFY FOUNDATION DETAILS.
3.FIELD MEASUREMENTS MUST BE TAKEN PRIOR TO FABRICATION.
4. SPECIFIC FENCE PATTERN, POST/RAIL DIMENSIONS, MATERIALS, COLOR, JOINTS, AND OTHER FENCE DETAILS SHALL BE SPECIFIED
BY DESIGNER FOR REVIEW AND APPROVAL BY SMC.
5. POSTS MAY BE EMBEDDED IN SIDEWALK , CONCRETE CURB, OR LANDSCAPE ADJACENT TO THE BIORETENTION PLANTER. POSTS
SHALL NOT BE INSTALLED INSIDE THE BIORETENTION PLANTER. SPECIFIC EMBEDMENT OF POST SHALL BE DESIGNED FOR SITE
SPECIFIC CONDITIONS.
EQUAL PANELS (5' MAX)
TO ACCOMODATE FULL PANELS AS NEEDED
FINISHED GRADE
CONCRETE FOOTING,
SEE NOTE 2
18" (MIN)
1" (MIN),
2" (MAX)
COMPACTED BASE,
SEE NOTE 2
4" (MAX)
FENCE PATTERN
VARIES, SEE NOTE 4
BIORETENTION COMPONENTSGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
1.8
BC
FILE NO.
N
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BC
1.1
BC
1.2
BC
1.3
BC
1.4
BC
1.5
BC
1.6
BC
1.7
BC
1.2.1
BC
1.8
BC
1.9
BC
1.10
BC
1.11
BC
1.12
BC
1.13
BC
1.5.1
BC
1.5.2
TYPICAL FENCE FENCE END
NOTES:
1. ALL MATERIAL, REINFORCEMENT AND WORKMANSHIP FOR EDGE TREATMENTS SHALL CONFORM TO SMC
DPW STANDARD SPECIFICATIONS AND APPLICABLE CODES.
2. ALTERNATIVE WOOD FENCE MATERIALS MAY BE USED WITH APPROVAL FROM SMC DPW.
3. DECK SCREWS SHALL BE USED TO TIE FASTEN RAILS TOGETHER AT POINT OF INTERSECTION AT POSTS.
EACH RAIL MUST OVERLAP EACH OTHER BY 3" TO ENSURE STABILITY.
4. FENCE END SECTION TO BE INCLUDED WHERE NOTED ON DRAWINGS.
5. DESIGNER TO SPECIFY FOOTING DETAILS.
VARIES (10' MAX O.C.)
CEDAR SPLIT RAILS WITH
TAPERED ENDS, 11' (TYP)
CHAMFERED TOP
4X4 LOCUST
POST (TYP)
COMPACTED BASE,
SEE NOTE 5.
5' O.C.
LARGER
OPENING TO
ACCOMODATE
BOTH RAILS
17"
14"
6"
20"
6"
CONCRETE FOOTING,
SEE NOTE 5.
BIORETENTION COMPONENTSGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
1.9
BC
FILE NO.
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BC
1.1
BC
1.2
BC
1.3
BC
1.4
BC
1.5
BC
1.6
BC
1.7
BC
1.2.1
BC
1.8
BC
1.9
BC
1.10
BC
1.11
BC
1.12
BC
1.13
BC
1.5.1
BC
1.5.2
SEAT WALL
12" (MIN)
SEAT WALL REINFORCING,
SEE NOTE 2
18" (TYP)
SEE NOTE 3
BIORETENTION
PLANTER
ADJACENT SIDEWALK/
PLAZA
DESIGNER NOTES:
1. ALL MATERIAL, REINFORCEMENT AND WORKMANSHIP FOR EDGE TREATMENTS SHALL CONFORM TO SMC
DPW STANDARD SPECIFICATIONS AND APPLICABLE CODES.
2. DESIGNER TO SPECIFY SEAT WALL REINFORCING AND FOOTING DETAILS. FOOTING DESIGN SHALL MINIMIZE
IMPACT TO STORAGE VOLUME WITHIN BIORETENTION PLANTER.
3. SEAT WALL HEIGHT AND VERTICAL PROFILE MUST COMPLY WITH SMC ACCESSIBILITY REQUIREMENTS.
4. SKATE STOP TO BE STAINLESS STEEL SKATESTOPPERS DIAMOND INSERT SERIES SKATE STOP OR
APPROVED EQUAL. PROVIDE SKATE STOPS AT EXPANSION JOINTS/GROUT LINES OF SEAT WALL AT NO
MORE THAN 48" O.C. SPACING ALONG LENGTH OF WALL.
5. DESIGNER TO IDENTIFY WALL CONTROL JOINT LOCATIONS.
CONCRETE SEAT WALL
3/8" EXPANSION
JOINT PER SMC DPW
SKATE STOP,
SEE NOTE 4
1%
CONCRETE FOOTING,
SEE NOTE 2
COMPACTED SUBGRADE,
SEE NOTE 2
SCARIFIED AND
UNCOMPACTED SUBGRADE
BIORETENTION COMPONENTSGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
1.10
BC
FILE NO.
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ID
BC
1.1
BC
1.2
BC
1.3
BC
1.4
BC
1.5
BC
1.6
BC
1.7
BC
1.2.1
BC
1.8
BC
1.9
BC
1.10
BC
1.11
BC
1.12
BC
1.13
BC
1.5.1
BC
1.5.2
SIDEWALK
A
BC
1
.
1
2
3:1 (MAX) SLOPE
DOWN TO
BIORETENTION
BASIN BOTTOM
12" (TYP) BENCH
AT BASIN EDGE
BIORETENTION
BASIN, SEE BB
2.2
NOTES:
1. THIS STYLE OF BRIDGE IS APPLICABLE TO PEDESTRIAN CROSSINGS OF
BIORETENTION BASINS AND CURB EXTENSIONS WITH SLOPED PLANTER SIDES
IN WHICH COMPACTED SOIL AT EACH SIDE OF THE BRIDGE CAN PROVIDE
ADEQUATE SUPPORT. FOR STORMWATER PLANTERS WITH VERTICAL CURB
WALLS, DESIGNERS SHALL MODIFY THE STRUCTURAL DESIGN TO ANCHOR
THE ENDS INTO THE CURB WALLS AT EACH END. ALL BRIDGE DESIGNS NEED
TO BE TAILORED TO MEET PROJECT-SPECIFIC SITE CONDITIONS AND
REQUIREMENTS.
2. ALL MATERIAL, REINFORCEMENT, AND WORKMANSHIP FOR EDGE
TREATMENTS SHALL CONFORM TO SMC DPW STANDARD SPECIFICATIONS
AND APPLICABLE CODES.
3. ALL WEIGHT-BEARING AND SUPPORT LUMBER MUST BE STRUCTURAL SELECT
GRADE.
4. BEAM FASTENERS TO BE STAINLESS STEEL, SIMPSON STRONG TIE, OR EQUAL.
DECKS SCREWS TO BE HEAVY-DUTY STAINLESS STEEL.
4 X 4 KICK RAIL
EACH SIDE
3 X 12 DECKING
6 X 8 STRINGER EACH
SIDE @ 56" O.C.
4' (MIN)
B
BC 1.13
CURB AND
GUTTER PER SMC
DPW STD. D-3 DETECTABLE
WARNING SURFACE
PER SMC STD. D-4C
ROADWAY
3' (MIN)
BIORETENTION COMPONENTSGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
1.11
BC
N
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ID
DATE
BC
1.1
BC
1.2
BC
1.3
BC
1.4
BC
1.5
BC
1.6
BC
1.7
BC
1.2.1
BC
1.8
BC
1.9
BC
1.10
BC
1.11
BC
1.12
BC
1.13
BC
1.5.1
BC
1.5.2
BB
2.2
SEE NOTE 1
BIORETENTION
BASIN, SEE
ROADWAYSIDEWALK
COMPACTED SOIL BEHIND
AND UNDER BRIDGE
SUPPORTS PER
GEOTECHNICAL ENGINEER'S
RECOMMENDATIONS
RIPPED 3" X 12"
10" X 10" X 8' MUD SILL
#5 REBAR GALVANIZED @
24" O.C. EACH MUD SILL.
SECURES EACH
STRINGER ON TOP OF
MUD SILL.
SIDEWALK
36" (MIN)
BIORETENTION BASIN
IMPERMEABLE MEMBRANE, 30 MIL
BLACK HDPE LINER. WRAP AROUND
MUDSILL TO SEPARATE ALL SIDES
WITH SOIL CONTACT. TRIM EXCESS
MEMBRANE 1" ABOVE FINISH SOIL
GRADE (TYP)
4" X 4" KICK RAIL
3" X 12" DECKING, FASTEN
W/ 50D GALV. NAILS
6" X 8" STRINGER @ 56" O.C.
2" X 4" CUT TO 4" X 4"
BLOCKING @ 30" O.C.
3" X 12"
SOIL DAM
SECTION A A
10"
30" (MAX)
7.5% (MAX)
NOTES:
1. DESIGNER TO ENSURE BOTTOM OF BRIDGE IS SET ABOVE MAXIMUM
PONDING ELEVATION AND THE MINIMUM REQUIRED FREEBOARD DEPTH.
2. ALL MATERIAL, REINFORCEMENT, AND WORKMANSHIP FOR EDGE
TREATMENTS SHALL CONFORM TO SMC DPW STANDARD SPECIFICATIONS
AND APPLICABLE CODES.
3. ALL WEIGHT-BEARING AND SUPPORT LUMBER MUST BE STRUCTURAL
SELECT GRADE.
4. BEAM FASTENERS TO BE STAINLESS STEEL, SIMPSON STRONG TIE, OR
EQUAL. DECKS SCREWS TO BE HEAVY-DUTY STAINLESS STEEL.
BIORETENTION COMPONENTSGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
1.12
BC
FILE NO.
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ID
DATE
BC
1.1
BC
1.2
BC
1.3
BC
1.4
BC
1.5
BC
1.6
BC
1.7
BC
1.2.1
BC
1.8
BC
1.9
BC
1.10
BC
1.11
BC
1.12
BC
1.13
BC
1.5.1
BC
1.5.2
BB
2.2
SEE NOTE 1
BIORETENTION
BASIN, SEE
SECTION B B
30" (MAX)
1.5% (MAX)
4" X 4" KICK
RAIL
6" X 8"
STRINGER
2" X 4" CUT
TO 4" X 4"
BLOCKING
3" x 12"
DECKING
NOTES:
1. DESIGNER TO ENSURE BOTTOM OF BRIDGE IS SET ABOVE MAXIMUM
PONDING ELEVATION AND THE MINIMUM REQUIRED FREEBOARD
DEPTH.
2. ALL MATERIAL, REINFORCEMENT, AND WORKMANSHIP FOR EDGE
TREATMENTS SHALL CONFORM TO SMC DPW STANDARD
SPECIFICATIONS AND APPLICABLE CODES.
3. ALL WEIGHT-BEARING AND SUPPORT LUMBER MUST BE STRUCTURAL
SELECT GRADE.
4. BEAM FASTENERS TO BE STAINLESS STEEL, SIMPSON STRONG TIE,
OR EQUAL. DECKS SCREWS TO BE HEAVY-DUTY STAINLESS STEEL.
BIORETENTION COMPONENTSGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
1.13
BC
FILE NO.
N
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ID
BC
1.1
BC
1.2
BC
1.3
BC
1.4
BC
1.5
BC
1.6
BC
1.7
BC
1.2.1
BC
1.8
BC
1.9
BC
1.10
BC
1.11
BC
1.12
BC
1.13
BC
1.5.1
BC
1.5.2
BIORETENTION COMPONENTSGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
2.1
BC
FILE NO.
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BC
2.1
BC
2.2
BC
2.3
BC
2.6
BC
2.4
BC
2.2.1
BC
2.3.1
BC
2.4.1
BC
2.5
PURPOSE:
CURB CUTS AND TRENCH DRAINS SERVE AS INLETS TO CONVEY STORMWATER RUNOFF TO A BIORETENTION
FACILITY. CURB CUTS ARE TYPICALLY USED IN PLANTER APPLICATIONS WHEN THE FACILITY IS IMMEDIATELY
ADJACENT TO THE ROADWAY (I.E. NO COURTESY STRIP), PROVIDING AN OPENING TO INTERCEPT AND CONVEY
STORMWATER FROM THE GUTTER TO THE PLANTER. TRENCH DRAIN SYSTEMS ARE MOST COMMONLY USED TO
CONVEY STORMWATER FROM A GUTTER THROUGH THE COURTESY STRIP TO A BIORETENTION PLANTER;
PROVIDING A CONTINUOUS SURFACE FOR PEDESTRIAN ACCESS WHILE MINIMIZING ELEVATION LOSSES AT THE
FACILITY INFLOW LOCATIONS. CURB CUT AND TRENCH DRAIN INLETS INCLUDE MODIFICATIONS TO THE GUTTER TO
HELP DIRECT FLOW INTO THE FACILITY.
DESIGNER NOTES & GUIDELINES:
1. THE DESIGNER MUST ADAPT DRAWINGS TO ADDRESS SITE-SPECIFIC CONDITIONS.
2. THE DESIGNER MUST ENSURE THAT CURB CUTS AND TRENCH DRAIN INLETS ARE ADEQUATELY SIZED,
SPACED, AND SLOPED. THE CURB CUT OPENING WIDTH MUST BE SIZED BASED ON THE CATCHMENT AREA,
LONGITUDINAL SLOPE ALONG THE CURB, AND THE CROSS SLOPE OF THE GUTTER OR ADJACENT PAVEMENT
AT THE INLET. SEE SIZING EQUATIONS AND NOMOGRAPHS FOR CURB OPENING INLETS IN THE U.S.
DEPARTMENT OF TRANSPORTATION HYDRAULIC ENGINEERING CIRCULAR NO. 27.
3. TRENCH DRAIN GRATES AND ASSEMBLIES MUST COMPLY WITH SMC ACCESSIBILITY REQUIREMENTS AND
SMCWPPP GI DESIGN GUIDE CHAPTER 4.
4. USE CURB CUT INLET/OUTLET MODIFICATION WITH METAL PLATE TOP (BC 2.2.1) WHEN ADJACENT TO VEHICLE
PARKING AND LOADING AREAS
DESIGNER CHECKLIST (MUST SPECIFY, AS APPLICABLE):
CURB CUT DIMENSIONS
FRAME AND GRATE TYPE/MATERIAL AND DIMENSIONS
CHANNEL DIMENSIONS
CONTROL ELEVATIONS FOR OPENINGS AT GUTTER AND PLANTER WALL
CURBCUT TYPE WITH OR WITHOUT METAL PLATE TOP MODIFICATION
PLAN
MATCH
GUTTER
WIDTH
MATCH
CURB
WIDTH
12" (MIN)
2' - 6"
(MIN)
18" (MIN)
SEE NOTE 3
12" (MIN)
3' - 6"
(MIN)
6"
TAPER (TYP)
SPLASH APRON,
NOT INTEGRAL
TO CURB
ROADWAY
SECTION A
GUTTER UPSLOPE AND
DOWNSLOPE OF CURB CUT
MATCH HEIGHT OF CURB UP
AND DOWNSLOPE OF CURB CUT
CONCRETE
SPLASH APRON
1" (MIN)
ISOMETRIC
CURB
6" TAPER
INFLOW
BIORETENTION AREA
SPLASH APRON
TAPER GUTTER AT CURB CUT TO
MATCH GUTTER SLOPE UPSLOPE
AND DOWNSLOPE OF CURB CUT.
SLOPE
1" (MIN), 2" (MAX) GUTTER
DEPRESSION AT FLOWLINE
INFLOW
CONSTRUCTION NOTES:
1. ALL MATERIAL AND WORKMANSHIP FOR CURB
CUTS SHALL CONFORM TO SMC DPW STANDARD
SPECIFICATIONS AND APPLICABLE CODES.
2. BOND NEW CURB AND GUTTER TO EXISTING CURB
AND GUTTER WITH EPOXY AND DOWEL
CONNECTION.
3. INLET WIDTH MAY BE INCREASED ON STEEPER
GUTTER SLOPES. DESIGNER TO SPECIFY.
6" (MIN), DESIGNER
TO SPECIFY
SEE NOTE 2
RO
A
D
W
A
Y
A
-
1" (MIN), 2" (MAX)
DEPRESSED GUTTER
OPTIONAL METAL PLATE TOP
MODIFICATION ADJACENT
TO PARKING AND LOADING.
SEE
PROVIDE 3/4" (MIN) WIDE,
45 DEGREE CHAMFER AT
CURB EDGE
BC
2.2.1
ENERGY DISSIPATOR,
SEE BC
2.6
BIORETENTION COMPONENTSGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
2.2
BC
FILE NO.
N
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ID
BC
2.1
BC
2.2
BC
2.3
BC
2.6
BC
2.4
BC
2.2.1
BC
2.3.1
BC
2.4.1
BC
2.5
PLAN
MATCH
CURB
WIDTH
18"
(MIN)
SEE NOTE 2
12" (MIN)
3' 6" (MIN)
CONCRETE SPLASH
APRON, NOT
INTEGRAL TO CURB
ROADWAY
SECTION A
GUTTER UPSLOPE AND
DOWNSLOPE OF CURB CUT
MATCH HEIGHT OF CURB
UPSLOPE AND DOWNSLOPE OF
CURB CUT
CONCRETE
SPLASH APRON1" (MIN)
ISOMETRIC
CURB
A
ROA
D
W
A
Y
INFLOW
BIORETENTION AREA
SPLASH APRON
TAPER GUTTER AT CURB CUT TO
MATCH GUTTER SLOPE UPSLOPE
AND DOWNSLOPE OF CURB CUT.
SLOPE
1" (MIN) GUTTER
DEPRESSION
AT FLOWLINE
CONSTRUCTION NOTES:
1. REFER TO BC 3.1 NOTES FOR GUIDELINES AND CHECKLIST.
2. INLET WIDTH MAY BE GREATER ON STEEP GUTTER SLOPES. DESIGNER TO SPECIFY.
3. BOND NEW CURB AND GUTTER TO EXISTING CURB AND GUTTER WITH EPOXY AND DOWEL CONNECTION.
4. METAL INLET ASSEMBLY SHALL BE HOT-DIP GALVANIZED IN ACCORDANCE WITH ASTM A-123.
5. HEADED CONCRETE ANCHORS SHALL MEET THE REQUIREMENTS OF ASTM A-108.
6. HSS 6 X 2 X 18 CHANNEL SHALL MEET THE REQUIREMENTS OF ASTM A-500 GRADE B.
7. END PLATES SHALL MEET THE REQUIREMENTS OF ASTM A-36
8. DESIGN VERTICAL WHEEL LOAD IS 8.5 KIPS (12 OF TANDEM AZLE WEIGHT SPECIFIED IN FHWA-HOP-06-105) AND SHALL WITHSTAND H-20 LOADING
9. SINGLE BEVEL GROOVE WELD
10. ALTERNATE MATERIAL FOR ASSEMBLY (E.G. CAST IRON, GRAY IRON) MAY BE USED PER DESIGN PLANS IF APPROVED BY JURISDICTION ENGINEER.
6" (MIN), ENGINEER
TO SPECIFY
SEE NOTE 2
RO
A
D
W
A
Y
A
-
1" (MIN), 2" (MAX)
DEPRESSED
GUTTER
B
ELEVATION SECTION B
METAL INLET ASSEMBLY
B
3"
3"
18"
6"
12"
3"
0.5"
0.5" X 4" F500
HEADED CONCRETE
ANCHOR CENTER ON
END PLATES
0.5" DIA. WEEP
HOLES (TYP)
MINIMUM 18"
THICK END PLATE
HSS 6 x 2 x 18"
316" DIA. WEEP HOLES (TYP)
MATCH
GUTTER
WIDTH
METAL PLATE
FLUSH TO
TOP OF CURB
GRIND SMOOTH TYP. BOTH
SIDES. SEE NOTE 4
0.5" X 4" LONG
HEADED CONCRETE
ANCHOR CENTER
ON END PLATES
MATCH WIDTH
OF ENTIRE
INLET/OUTLET
METAL TOP PLATE
12" (MIN)
12" (MIN)
PROVIDE 3/4" (MIN) WIDE, 45
DEGREE CHAMFER AT CURB
EDGE
ENERGY DISSIPATOR,
SEE BC
2.6
BIORETENTION COMPONENTSGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
2.2.1
BC
FILE NO.
NO
T
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N
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T
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C
T
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O
N
-
R
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F
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S
E
R
G
U
I
D
E
BC
2.1
BC
2.2
BC
2.3
COMPONENTS
INLETS
NOTES
BC
2.6
BC
2.4
BC
2.2.1
BC
2.3.1
BC
2.4.1
BC
2.5
COUNTY OF SANMATEO
PUBLIC WORKS
ROADWAY
PLAN
ISOMETRIC
CURB AND GUTTER
PER SMC DPW STD D-3
BIORETENTION
PLANTER
GUTTER
MODIFICATION
AT INLET, SEE
CURB
PLANTER WALL
SPLASH APRON
SECTION A
SPLASH APRON NOT
INTEGRAL TO CURB
ENERGY DISSIPATION
1" (MIN)
BIOTREATMENT SOILS
SLOPE
2" GUTTER
DEPRESSION
CONSTRUCTION NOTES:
1. ALL MATERIAL AND WORKMANSHIP FOR CURB
CUTS SHALL CONFORM TO SMC DPW STANDARD
SPECIFICATIONS AND APPLICABLE CODES.
2. BOND NEW CURB AND GUTTER TO EXISTING CURB
AND GUTTER WITH EPOXY AND DOWEL
CONNECTION.
3. OPTIONAL CHAMFERED OR FILLET EDGES AT CURB
CUTS MAY BE USED.
TOP OF PLANTER WALL
TOP OF CURB
PLANTER WALL
SIDEWALK
BC
2.2
18" (MIN)
SEE NOTE 3
SEE
NOTE 2
12" (MIN)
4" (MIN), DESIGNER TO SPECIFY
INFLOW
TAPER CURB TO MATCH
GRADE, ALIGN WITH
GUTTER TERMINATION
SPLASH APRON
ENERGY
DISSIPATION
A
-
TAPER TO MATCH GRADE
BIORETENTION COMPONENTSGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
2.3
BC
FILE NO.
BC
2.1
BC
2.2
BC
2.3
BC
2.6
BC
2.4
BC
2.2.1
BC
2.3.1
BC
2.4.1
BC
2.5
ROADWAY
PLAN
ISOMETRIC
CURB AND GUTTER
PER SMC DPW STD D-3
GUTTER
MODIFICATION
AT INLET, SEE
CURB
PLANTER WALL
SPLASH APRON
SECTION A
CONCRETE SPLASH APRON
NOT INTEGRAL TO CURB
1" (MIN)
SLOPE
2" GUTTER
DEPRESSION
CONSTRUCTION NOTES:
1. ALL MATERIAL AND WORKMANSHIP FOR CURB
CUTS SHALL CONFORM TO LOCAL JURISDICTION
STANDARD SPECIFICATIONS AND APPLICABLE
CODES.
2. BOND NEW CURB AND GUTTER TO EXISTING CURB
AND GUTTER WITH EPOXY AND DOWEL
CONNECTION.
3. OPTIONAL CHAMFERED OR FILLET EDGES AT CURB
CUTS MAY BE USED.
TOP OF PLANTER WALLTOP OF CURB
PLANTER WALL
SIDEWALK
BC
2.2
18" (MIN)
SEE NOTE 3
SEE
NOTE 2
12" (MIN)
6" (MIN), DESIGNER TO SPECIFY
INFLOW
TAPER CURB TO MATCH
GRADE, ALIGN WITH
GUTTER TERMINATION
SPLASH PAD
ENERGY DISSIPATOR
A
-
TAPER TO MATCH GRADE
METAL PLATE TOP
CURBCUT MODIFICATION
INLET MODIFICATION
FOR METAL PLATE TOP
ENERGY DISSIPATOR
BIORETENTION
AREA
REFLECTIVE
MARKERS PER SMC
ROAD STANDARDS
ENERGY DISSIPATOR,
SEE BC
2.6
BIORETENTION COMPONENTSGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
2.3.1
BC
FILE NO.
N
T
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ID
BC
1.1
BC
1.2
BC
1.3
BC
1.4
BC
1.5
BC
1.6
BC
1.7
BC
2.1
BC
2.2
BC
2.3
BC
3.1
BC
3.2
BC
3.4
BC
4.1
BC
5.1
BC
5.2
BC
6.1
BC
6.2
BC
2.4
BC
3.3
BC
1.2.1
BC
2.2.1
BC
2.3.1
BC
2.4.1
BC
3.3.1
BC
2.5
ISOMETRIC
GRATE
CURB
COURTESY ZONE
GRATE
CURB AND GUTTER
PER SMC DPW STD D-3
BIORETENTION
BASIN OR PLANTER
PLAN
GUTTER
MODIFICATION
AT INLET, SEE
18" WIDE CAST IRON
TRENCH GRATE,
SEE NOTE 3
#3 @ 12" O.C.
(HOR) (5) MIN
EXPANSION
JOINT PER DPW
APPROVAL (TYP)
18" (MIN),
SEE NOTE 7
6" (MIN)
CONCRETE
CHANNEL
SECTION B
ANCHOR
A
A
FRAME VARIES PER
MANUFACTURER'S
RECOMMENDATIONS
OUTLET TO
PLANTER
A
BC
2.2
GUTTER
MODIFICATION
AT INLET, SEE BC
2.2
#3 @ 12" O.C.
MIN (3) #3
#5 REBAR
(MIN)
6" (MIN)6" (MIN)
SPLASH APRON,
NOT INTEGRAL TO
CURB, SEE BC
2.2
FLUSH EDGES (TYP)
ROADWAY
WITH PARKING
SLOPE, SEE
NOTE 2
SECTION A
1" (MIN)
1" (MIN)
RAISED PLANTER WALL BRIDGING
OVER CHANNEL OPENING
SPLASH APRON
MATCH ADJACENT
SIDEWALK SLOPE
CONCRETE CHANNEL
EXTEND TRENCH GRATE TO
FACE OF RAISED PLANTER WALL
BIOTREATMENT SOILS
GUTTER
MODIFICATION
AT INLET, SEE BC
2.2
SLOPE
2" GUTTER
DEPRESSION
INFLOW
ENERGY DISSIPATOR
SLOPE TO DRAIN
PREPARED AND
COMPACTED SOIL
A -
B
-
4" (MIN)
DESIGNER
TO SPECIFY
#5 REBAR (MIN)
CONSTRUCTION NOTES:
1. ALL MATERIAL, REINFORCEMENT AND
WORKMANSHIP FOR TRENCH DRAIN ASSEMBLY
SHALL CONFORM TO SMC DPW STANDARD
SPECIFICATIONS AND APPLICABLE CODES.
2. SLOPE TO PROVIDE AT LEAST 1 INCH DROP
OVER LENGTH OF CHANNEL OR A MINIMUM OF
2 PERCENT, WHICHEVER IS LARGER.
3. ALL TRENCH GRATES SHALL BE REMOVABLE,
RATED PER THE ANTICIPATED LOADING, AND
BOLTED IN PLACE OR OUTFITTED WITH
APPROVED TAMPER-RESISTANT LOCKING
MECHANISM, FLUSH OR RECESSED IN GRATE.
4. BOND NEW CURB AND GUTTER TO EXISTING
CURB AND GUTTER WITH EPOXY AND DOWEL
CONNECTION.
5. HORIZONTAL CONTROL JOINTS SHALL BE
PROVIDED EVERY 10 LINEAR FEET, OR PER
MANUFACTURER'S RECOMMENDATIONS.
6. APPLY EPOXY BONDING AGENT AT ALL TRENCH
DRAIN CONSTRUCTION COLD JOINTS.
7. INLET CURB CUT AND CONCRETE CHANNEL
WIDTH SHALL BE INCREASED ON STEEPER
GUTTER SLOPES. DESIGNER TO SPECIFY.
OFFSET
CORNER 14" @
INFLOW SIDE, IF
FEASIBLE
BIORETENTION COMPONENTSGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
2.4
BC
FILE NO.
N
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F
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ID
BC
2.1
BC
2.2
BC
2.3
BC
2.6
BC
2.4
BC
2.2.1
BC
2.3.1
BC
2.4.1
BC
2.5
ISOMETRIC
GRATE
CURB
COURTESY ZONE
FRAME AND
GRATE
CURB AND GUTTER
PER SMC DPW STD D-3
PLAN
GUTTER
MODIFICATION
AT INLET, SEE
18" WIDE CAST IRON
TRENCH GRATE,
SEE NOTE 3
#3 @ 12" O.C.
(HOR) (5) MIN
EXPANSION
JOINT PER
MUNICIPAL
ENGINEER
APPROVAL
(TYP)
18"
(MIN)
6" (MIN)
CONCRETE
CHANNEL
SECTION B
ANCHOR
A
A
FRAME VARIES PER
MANUFACTURER'S
RECOMMENDATIONS
OUTLET TO
PLANTER
A
BC
2.2
GUTTER
MODIFICATION
AT INLET, SEE BC
2.2
#3 @ 12" O.C.
MIN (3) #3
#5 REBAR
(MIN)
6" (MIN)6" (MIN)
SPLASH APRON
FLUSH EDGES (TYP)
ROADWAY
WITH PARKING
SLOPE, SEE
NOTE 2
SECTION A
1" (MIN)
1" (MIN)
RAISED BIORETENTION AREA WALL
BRIDGING OVER CHANNEL OPENING
SPLASH APRON
MATCH ADJACENT
SIDEWALK SLOPE
CONCRETE CHANNEL
PREPARED AND
COMPACTED SOIL
EXTEND TRENCH GRATE TO FACE OF RAISED
PLANTER WALL
BIORETENTION AREA
GUTTER
MODIFICATION
AT INLET, SEE BC
2.2
SLOPE
2" GUTTER
DEPRESSION
INFLOW
ENERGY DISSIPATOR,
SEE
A -
SLOPE TO DRAIN
6" (MIN)
DESIGNER
TO SPECIFY
B
-
CONSTRUCTION NOTES:
1. ALL MATERIAL AND WORKMANSHIP FOR
TRENCH DRAIN ASSEMBLY SHALL CONFORM
TO MUNICIPAL'S STANDARD SPECIFICATIONS
AND APPLICABLE CODES.
2. SLOPE TO PROVIDE AT LEAST 1 INCH DROP
OVER LENGTH OF CHANNEL OR A MINIMUM OF
2 PERCENT, WHICHEVER IS LARGER.
3. ALL TRENCH GRATES SHALL BE REMOVABLE,
RATED PER THE ANTICIPATED LOADING, AND
BOLTED IN PLACE OR OUTFITTED WITH
APPROVED TAMPER-RESISTANT LOCKING
MECHANISM, FLUSH OR RECESSED IN GRATE.
4. BOND NEW CURB AND GUTTER TO EXISTING
CURB AND GUTTER WITH EPOXY AND DOWEL
CONNECTION.
5. HORIZONTAL CONTROL JOINTS SHALL BE
PROVIDED EVERY 10 LINEAR FEET, OR PER
MANUFACTURER'S RECOMMENDATIONS.
6. APPLY EPOXY BONDING AGENT AT ALL TRENCH
DRAIN CONSTRUCTION COLD JOINTS.
7. INLET CURB CUT AND CONCRETE CHANNEL
WIDTH SHALL BE INCREASED ON STEEPER
GUTTER SLOPES. DESIGNER TO SPECIFY.
#5 REBAR (MIN)METAL TOPPED INLET
AT PARKING AND
LOADING ADJACENCY.
SEE BC
2.2.1
BIORETENTION AREA
BC
2.6
BIORETENTION COMPONENTSGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
2.4.1
BC
FILE NO.
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BC
2.1
BC
2.2
BC
2.3
BC
2.6
BC
2.4
BC
2.2.1
BC
2.3.1
BC
2.4.1
BC
2.5
ISOMETRIC
GRATE
CURB
COURTESY ZONE
18" (TYP) WIDE CAST
IRON TRENCH GRATE,
SEE NOTE 4
#3 @ 12" O.C.
(HOR) (5) MIN
EXPANSION JOINT
PER DPW
APPROVAL (TYP)
6" (MIN)CONCRETE
CHANNELSECTION B
OUTLET TO
PLANTER
GUTTER
MODIFICATION
AT INLET, SEE BC
2.2
#3 @ 12" O.C.
MIN (3) #3
6" (MIN)
6" (MIN)
FLUSH EDGES (TYP)
SECTION A
1" (MIN)
1" (MIN)
RAISED PLANTER WALL BRIDGING
OVER CHANNEL OPENING
SPLASH APRON, SEE
MATCH ADJACENT
SIDEWALK SLOPE
GUTTER
MODIFICATION
AT INLET, SEE BC
2.2
SLOPE
1" (MIN), 2" (MAX) GUTTER
DEPRESSION
INFLOW
PREPARED AND
COMPACTED SOIL
#5 REBAR (MIN)EXTEND TRENCH GRATE TO FACE OF
RAISED PLANTER WALL
NOTES:
1. THIS DETAIL SHOWS ONE EXAMPLE OF A CUSTOMIZED TRASH CAPTURE DEVICE THAT CAN BE PROVIDED ON THE INLET SIDE OF
ROADSIDE BIORETENTION PLANTERS TO MEET THE FULL TRASH CAPTURE SYSTEM REQUIREMENTS MANDATED BY THE STATE AND
REGIONAL WATER BOARDS* OR AS A PRE-TREATMENT MEASURE IF THE BIORETENTION PLANTER IS DESIGNED TO MEET THE FULL
TRASH CAPTURE REQUIREMENTS.
2. ALL MATERIAL AND WORKMANSHIP FOR TRENCH DRAIN AND TRASH CAPTURE ASSEMBLY SHALL CONFORM TO COUNTY OF SAN
MATEO STANDARD SPECIFICATIONS AND APPLICABLE PUBLIC WORKS CODES.
3. PROVIDE AT LEAST 1 INCH DROP BETWEEN INLET ELEVATION AT GUTTER AND PONDING ELEVATION.
4. ALL TRENCH GRATES/TRASH CAPTURE STRUCTURE LIDS SHALL BE REMOVABLE, RATED PER THE ANTICIPATED LOADING (H-20
LOADING WITHIN PUBLIC STREETS), AND BOLTED IN PLACE OR OUTFITTED WITH APPROVED TAMPER-RESISTANT LOCKING
MECHANISM, FLUSH OR RECESSED IN GRATE.
5. BOND NEW CURB AND GUTTER TO EXISTING CURB AND GUTTER WITH EPOXY AND DOWEL CONNECTION.
6. HORIZONTAL CONTROL JOINTS SHALL BE PROVIDED EVERY 10 LINEAR FEET, OR PER MANUFACTURER'S RECOMMENDATIONS.
7. APPLY EPOXY BONDING AGENT AT ALL TRENCH DRAIN CONSTRUCTION COLD JOINTS.
8. SCREEN SHALL BE CUSTOMIZED VERSION OF CONNECTOR PIPE SCREEN (CPS) DEVICE THAT IS LISTED IN TABLE 1 OF THE STATE
WATER BOARD'S CERTIFIED FULL CAPTURE SYSTEM LIST OF TRASH TREATMENT CONTROL DEVICES. DESIGNER TO WORK WITH
SELECTED MANUFACTURER ON THE DETAILED SCREEN DESIGN AND SPECIFICATIONS.
9. DESIGNER TO SET HEIGHT OF SCREEN PER SPECIFIC PROJECT NEEDS AND HYDRAULIC CONDITIONS*. THE MINIMUM HEIGHT OF
SCREEN SHALL BE AT LEAST AS HIGH AS MINIMUM FREEBOARD ON DESIGN PONDING ELEVATION (TYPICALLY 2") WHILE ALLOWING
ADEQUATE CLEARANCE BETWEEN BOTTOM OF TRENCH DRAIN AND TOP OF SCREEN (IDEALLY 4").
*IF THE INLET STRUCTURE IS BEING USED TO FULFILL FULL TRASH CAPTURE SYSTEM REQUIREMENTS (AND THE BENEFITS OF THE
BIORETENTION PLANTER ARE EXCLUDED), THE DESIGNER WILL NEED TO DEMONSTRATE THAT THE SCREEN IS SET AT AN ADEQUATE
HEIGHT TO TREAT THE PEAK FLOW FROM THE 1-YEAR, 1-HOUR STORM IN THE AREA DRAINING TO THE INLET.
2' (MIN)
1.5' (MIN)
6" (MIN)
12"
2" DIA. WEEPHOLE (MIN)
DRAIN TO DRAINAGE COURSE
BC
2.2
DESIGN PONDING
ELEVATION
DRAINAGE COURSE
SEE NOTE 9
BIOTREATMENT SOIL MEDIA
FILTER FABRIC
CHANNEL OPENING
SEE NOTE 9
TRASH ACCUMULATION
PERFORATED STAINLESS
STEEL SCREEN WITH 5 MM
(MAX) OPENINGS, SEE
SECTION A AND NOTE 8
SS "L" BRACKETS PER
SCREEN MANUFACTURER'S
RECOMMENDATIONS
ENERGY
DISSIPATION
PERFORATED STAINLESS
STEEL SCREEN WITH 5
MM (MAX) OPENINGS, SEE
SECTION B AND NOTE 8
15" (TYP)
DESIGNER
TO SPECIFY
BIORETENTION COMPONENTSGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
2.5
BC
FILE NO.
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BC
2.1
BC
2.2
BC
2.3
BC
2.6
BC
2.4
BC
2.2.1
BC
2.3.1
BC
2.4.1
BC
2.5
8" (MIN)
6" (TYP)
SECTION A-A
DIMENSIONS:
WIDTH (W) x LENGTH (L)
INLET:
W = EXTEND MIN. 12" BEYOND SPLASH APRON
L = EXTEND MIN. 12" BEYOND SPLASH APRON
OUTLET:
W = EXTEND 6" MIN. BEYOND BOTTOM OF
CURB CUT
L = 12" MIN.
CONSTRUCTION NOTES:
1. COBBLES SHALL BE ARRANGED IN PATTERN
THAT PREVENTS LINEAR FLOW PATHS
THROUGH THE ENERGY DISSIPATOR.
2. ENSURE THAT SOIL BENEATH ENERGY
DISSIPATORS IS STABLE AND WILL NOT SETTLE
OVER TIME.
3. ENSURE CONCAVITY IN BOTH DIRECTIONS OF
ENERGY DISSIPATOR.
4"-6" DIAMETER WASHED STREAMBED COBBLES
TO BE SET INTO CONCRETE PAD FOLLOWING
INITIAL CURING OF CONCRETE. STREAMBED
COBBLES TO BE FREE OF JAGGED EDGES.
TOP OF COBBLE TO BE FLUSH WITH INVERT OPENING
HALF OF COBBLE TO BE SET ABOVE CONCRETE
6" CLASS 2 PERMEABLE MATERIAL
8x8, 8/8 WWM, PLACED
IN THE BOTTOM THIRD
OF SPLASHPAD
6" (TYP)
2" (TYP) OF CONCRETE
TO BE MAINTAINED ON
ALL SIDES OF ENERGY
DISSIPATOR
1/4" MIN.
1" MAX.
PLAN
W = VARIES
L
=
V
A
R
I
E
S
A
-
FL
O
W
ENERGY DISSIPATOR PAD
CONCRETE SPLASH PAD
CURB CUT INLET OPENING
BIORETENTION COMPONENTSGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
2.6
BC
FILE NO.
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BC
2.1
BC
2.2
BC
2.3
BC
2.6
BC
2.4
BC
2.2.1
BC
2.3.1
BC
2.4.1
BC
2.5
BIORETENTION COMPONENTSGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
3.1
BC
FILE NO.
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PURPOSE:
BIORETENTION OUTLET STRUCTURES CONVEY SURFACE AND/OR SUBSURFACE OUTFLOWS FROM A
BIORETENTION FACILITY TO AN APPROVED DISCHARGE LOCATION.
DESIGNER NOTES & GUIDELINES:
1. THE DESIGNER MUST ADAPT DRAWINGS TO ADDRESS SITE-SPECIFIC CONDITIONS.
2. THE DESIGNER MUST SIZE CURB CUT, GRATE, AND OTHER OVERFLOW STRUCTURE FEATURES TO
SATISFY RESPONSIBLE JURISDICTION HYDRAULIC REQUIREMENTS.
3. AN OUTLET STRUCTURE OR CLEANOUT(S) THAT ALLOWS MAINTENANCE ACCESS TO ALL PIPES IS
REQUIRED FOR FACILITIES WITH UNDERDRAINS.
4. IF SITE CONSTRAINTS NECESSITATE STORM DRAIN PIPE IN AN AREA SUBJECT TO VEHICULAR TRAFFIC
OR OTHER LOADING, APPROPRIATE COVER DEPTH AND PIPE MATERIAL MUST BE SPECIFIED.
5. OUTLET PIPES MUST BE EQUIPPED WITH CLEANOUTS, SEE CLEANOUT DETAILS (GC 5.2).
6. DESIGNER SHALL EVALUATE BUOYANCY OF STRUCTURES FOR SITE SPECIFIC APPLICATION AND
SPECIFY THICKENED OR EXTENDED BASE / ANTI-FLOTATION COLLAR, AS NECESSARY.
7. USE CURB CUT INLET/OUTLET WITH METAL PLATE TOP (BC 2.2.1) WHEN ADJACENT TO VEHICLE
PARKING AND LOADING AREAS
DESIGNER CHECKLIST (MUST SPECIFY, AS APPLICABLE):
OUTLET STRUCTURE TYPE/MATERIAL, DIAMETER, AND DEPTH
ATRIUM GRATE MANUFACTURER, MODEL NO., AND SIZE
FRAME AND GRATE TYPE, MODEL NO., AND SIZE
CONTROL ELEVATIONS FOR OUTLET STRUCTURE RIMS
MATERIAL AND DIAMETER FOR ALL PIPES
WATER TIGHT CONNECTOR TYPE FOR ALL WALL PENETRATIONS (E.G. GROUTED, COMPRESSION,
BOOT), SEE GC 2.9 AND GC 2.10
CURB CUT WITH OR WITHOUT METAL PLATE TOP MODIFICATION
BC
3.1
BC
3.2
BC
3.4
BC
3.3
BC
3.3.1
BIORETENTION
BASIN OR PLANTER
PLAN
MATCH
GUTTER
WIDTH
MATCH
CURB
WIDTH
2' (MIN)
6"
TAPER (TYP)
ROADWAY
SECTION A
GUTTER
MATCH HEIGHT OF CURB UP
AND DOWNSLOPE OF CURB CUT
ISOMETRIC
CURB
6" (MIN) TAPER
CONSTRUCTION NOTES:
1. ALL MATERIAL AND WORKMANSHIP FOR CURB CUTS
SHALL CONFORM TO SMC DPW STANDARD
SPECIFICATIONS AND APPLICABLE CODES.
2. BOND NEW CURB AND GUTTER TO EXISTING CURB
AND GUTTER WITH EPOXY AND DOWEL
CONNECTION.
3. MATCH GUTTER SLOPE UP AND DOWNSLOPE OF
CURB CUT SLOPE SIMILAR TO INLET DETAIL UNLESS
MODIFYING GUTTER
4. OUTLET CURB CUT WIDTH MAY BE INCREASED ON
STEEP GUTTER SLOPES. DESIGNER TO SPECIFY.
5. OPTIONAL CHAMFERED OR FILLET EDGES AT CURB
CUTS MAY BE USED.
SEE NOTE 3
OUTFLOW
DESIGN PONDING ELEVATION
EQUAL TO GUTTER FLOW LINE
ELEVATION AT OUTLET
OPTIONAL EROSION CONTROL
12" (MIN)
18" (MIN)
SEE NOTE 4
3' (MIN)
OUTFLOW
SEE NOTE 2
RO
A
D
W
A
Y
SLOPE
OPTIONAL GUTTER
MODIFICATION AT
OUTLET, SEE BC
2.2
A
-
BIORETENTION COMPONENTSGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
3.2
BC
FILE NO.
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OUTLET - CURB CUT 1
BC
3.1
BC
3.2
BC
3.4
BC
3.3
BC
3.3.1
ISOMETRIC
FRAME AND GRATE
CURB
COURTESY ZONE
FRAME AND
GRATE
BIORETENTION BASIN
OR PLANTER
18" (MIN) WIDE CAST
IRON TRENCH
GRATE, SEE NOTE 4
#3 @ 12" O.C.
(HOR) (5) MIN
EXPANSION
JOINT PER DPW
APPROVAL (TYP)
6" (MIN)
CONCRETE
CHANNEL
SECTION B
ANCHOR
A
A
FRAME VARIES PER
MANUFACTURER'S
RECOMMENDATIONS
INLET FROM
PLANTER
A
#3 @ 12" O.C.
MIN (3) #3
CURB AND GUTTER
PER SMC DPW STD D-3
#5 REBAR (MIN)
18" (MIN)
DESIGNER
TO SPECIFY,
SEE NOTE 8
6" (MIN)6" (MIN)
SEE NOTE 4
OPTIONAL GUTTER
MODIFICATION AT
OUTLET, SEE BC
2.2
PLAN
ROADWAY
WITH PARKING
SLOPE, SEE
NOTE 3
SECTION A
1" (MIN)
RAISED PLANTER WALL BRIDGING
OVER CHANNEL OPENINGMATCH ADJACENT
PAVEMENT SLOPE
CONCRETE CHANNEL
EXTEND TRENCH GRATE TO
FACE OF RAISED PLANTER WALL
SLOPE
SEE NOTE 1
OUTFLOW
BIOTREATMENT SOILS
OPTIONAL EROSION CONTROL
DESIGN PONDING ELEVATION
EQUAL TO GUTTER FLOW LINE
ELEVATION AT OUTLET
PREPARED AND
COMPACTED SOIL
B
-
#5 REBAR (MIN)
OUTLET - TRENCH DRAIN 1
CONSTRUCTION NOTES:
1. ALL MATERIAL AND WORKMANSHIP FOR
TRENCH DRAIN ASSEMBLY SHALL CONFORM TO
SMC DPW STANDARD SPECIFICATIONS AND
APPLICABLE CODES.
2. MATCH GUTTER SLOPE UP AND DOWNSLOPE
(UNLESS MODIFYING GUTTER SLOPE INLET
DETAIL).
3. SLOPE TO PROVIDE AT LEAST 1 INCH DROP
OVER LENGTH OF CHANNEL OR A MINIMUM OF 2
PERCENT, WHICHEVER IS LARGER.
4. ALL TRENCH GRATES SHALL BE REMOVABLE,
RATED PER THE ANTICIPATED LOADING, AND
BOLTED IN PLACE OR OUTFITTED WITH
APPROVED TAMPER-RESISTANT LOCKING
MECHANISM, FLUSH OR RECESSED IN GRATE.
5. HORIZONTAL CONTROL JOINTS SHALL BE
PROVIDED EVERY 10 LINEAR FEET, OR PER
MANUFACTURER'S RECOMMENDATIONS.
6. BOND NEW CURB AND GUTTER TO EXISTING
CURB AND GUTTER WITH EPOXY AND DOWEL
CONNECTION.
7. APPLY EPOXY BONDING AGENT AT ALL TRENCH
DRAIN CONSTRUCTION COLD JOINTS.
8. INLET CURB CUT AND CONCRETE CHANNEL
WIDTH SHALL BE 16" (MIN) ON GUTTER SLOPES
> 5%.
BIORETENTION COMPONENTSGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
3.3
BC
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BC
3.1
BC
3.2
BC
3.4
BC
3.3
BC
3.3.1
ISOMETRIC
FRAME AND GRATE
CURB
COURTESY ZONE
FRAME AND
GRATE
BIORETENTION
AREA
18" (MIN) WIDE CAST IRON
TRENCH GRATE, SEE NOTE 4
#3 @ 12" O.C.
(HOR) (5) MIN
EXPANSION JOINT
PER MUNICIPAL
ENGINEER
APPROVAL (TYP)
6" (MIN)
CONCRETE
CHANNEL
SECTION B
ANCHOR
A
A
FRAME VARIES PER
MANUFACTURER'S
RECOMMENDATIONS
INLET FROM
PLANTER
A
CONSTRUCTION NOTES:
1. ALL MATERIAL AND WORKMANSHIP FOR
TRENCH DRAIN ASSEMBLY SHALL CONFORM TO
MUNICIPAL'S STANDARD SPECIFICATIONS AND
APPLICABLE CODES.
2. MATCH GUTTER SLOPE UP AND DOWNSLOPE
(UNLESS MODIFYING GUTTER SLOPE INLET
DETAIL).
3. SLOPE TO PROVIDE AT LEAST 1 INCH DROP
OVER LENGTH OF CHANNEL OR A MINIMUM OF 2
PERCENT, WHICHEVER IS LARGER.
4. ALL TRENCH GRATES SHALL BE REMOVABLE,
RATED PER THE ANTICIPATED LOADING, AND
BOLTED IN PLACE OR OUTFITTED WITH
APPROVED TAMPER-RESISTANT LOCKING
MECHANISM, FLUSH OR RECESSED IN GRATE.
5. HORIZONTAL CONTROL JOINTS SHALL BE
PROVIDED EVERY 10 LINEAR FEET, OR PER
MANUFACTURER'S RECOMMENDATIONS.
6. BOND NEW CURB AND GUTTER TO EXISTING
CURB AND GUTTER WITH EPOXY AND DOWEL
CONNECTION.
7. APPLY EPOXY BONDING AGENT AT ALL TRENCH
DRAIN CONSTRUCTION COLD JOINTS.
8. INLET CURB CUT AND CONCRETE CHANNEL
WIDTH SHALL BE 16" (MIN) ON GUTTER SLOPES
> 5%.
OUTLET - TRENCH DRAIN 1
#3 @ 12" O.C.
MIN (3) #3
CURB AND GUTTER
18" (MIN)
SEE NOTE 8
6" (MIN)
SEE NOTE 4
OPTIONAL GUTTER
MODIFICATION AT
OUTLET, SEE BC
2.2
PLAN
ROADWAY
WITH PARKING
SLOPE, SEE
NOTE 3
SECTION A
1" (MIN)
RAISED BIORETENTION WALL
BRIDGING OVER CHANNEL OPENINGMATCH ADJACENT
PAVEMENT SLOPE
CONCRETE CHANNEL
PREPARED AND
COMPACTED SOIL
SLOPE
SEE NOTE 1
B
-
OUTFLOW
BIORETENTION AREA
OPTIONAL EROSION CONTROL
DESIGN PONDING ELEVATION
EQUAL TO GUTTER FLOW LINE
ELEVATION AT OUTLET
#5 REBAR (MIN)
EXTEND TRENCH GRATE TO FACE OF RAISED
PLANTER WALL
BC
2.2.1
METAL TOPPED OUTLET
AT PARKING AND
LOADING ADJACENCY.
SEE
FLUSH EDGES (TYP)
A -
COBBLE EMBEDDED
ENERGY DISSIPATER
#5 REBAR (MIN)
6" (MIN)
BIORETENTION COMPONENTSGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
3.3.1
BC
FILE NO.
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BC
3.1
BC
3.2
BC
3.4
BC
3.3
BC
3.3.1
OVERFLOW STRUCTURE AREA DRAIN 1
BEEHIVE/DOME GRATE,
SEE NOTE 2, DESIGNER
TO SPECIFY
OVERFLOW
STRUCTURE,
SEE NOTE 4
SLOTTED UNDERDRAIN
PIPE, SEE
DESIGNER TO SPECIFY
ELEVATION (TYP)
WALL
PENETRATION
STORM DRAIN PIPE
WITH DIRECT
DISCHARGE TO STREET
STORM DRAIN SYSTEM,
DESIGNER TO SPECIFY
CONSTRUCTION NOTES:
1. ALL MATERIAL AND WORKMANSHIP FOR OVERFLOW STRUCTURES SHALL CONFORM
TO SMC DPW STANDARD SPECIFICATIONS AND APPLICABLE CODES.
2. SIZE OF ATRIUM GRATE SHALL MATCH SIZE OF RISER SPECIFIED IN PLANS, SHALL
BE REMOVABLE TO PROVIDE MAINTENANCE ACCESS, AND SHALL BE BOLTED IN
PLACE OR OUTFITTED WITH APPROVED TAMPER-RESISTANT LOCKING MECHANISM.
MAXIMUM GRATE OPENINGS SHALL BE 4 INCHES. GRATE MATERIAL SPECIFICATION
SHALL CONSIDER SITE CONDITIONS, E.G. PUBLIC VS PRIVATE SETTING, TRAFFIC
LOADING, UV EXPOSURE, AND PROXIMITY TO OCEAN/BAY.
3. IF INTERIOR DEPTH OF OVERFLOW STRUCTURE EXCEEDS 5 FEET, A MINIMUM
CLEAR SPACE OF 30 INCH BY 30 INCH SHALL BE PROVIDED FOR MAINTENANCE
ACCESS.
4. BARREL/BOX AND BASE OF CATCH BASIN MAY BE PRE-CAST WITH REINFORCING
STEEL PER MANUFACTURER'S RECOMMENDATIONS, POURED IN PLACE CONCRETE
WITHOUT STEEL PER SMC DPW STANDARD SPECIFICATIONS AND APPLICABLE
CODES, OR NYLOPLAST DRAIN BASIN (2812AG OR EQUAL). ENGINEER TO SPECIFY.
5. MINIMUM STREAMBED COBBLE DIAMETER SHALL BE LARGER THAN MAXIMUM
GRATE OPENING.
6. GROUT ALL PENETRATIONS, CRACKS, SEAMS, AND JOINTS WITH CLASS "C"
MORTAR.
12" (MIN)
SEE NOTE 3
6" (MIN)6" (MIN)GRAVEL BASE
ASTM NO. 57
OPTIONAL
STREAMBED COBBLES
(TYP), SEE NOTE 5
BC
5.1
BC
5.2
DESIGN PONDING
ELEVATION
BIORETENTION COMPONENTSGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
3.4
BC
FILE NO.
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BC
3.1
BC
3.2
BC
3.4
BC
3.3
BC
3.3.1
12" (MIN)
DESIGNER NOTES & GUIDELINES:
1. MULCH SHALL BE AGED OR COMPOSTED WOOD MULCH OR ROCK MULCH
CONFORMING TO SMCWPPP GI DESIGN GUIDE, APPENDIX A.4 AND/OR OTHER
APPLICABLE SMC REQUIREMENTS.
2. INSTALL BIOTREATMENT SOIL MEDIA (BSM) IN EITHER TWO 10" LIFTS AND
THEN WETTED TO ACCOMODATE AN EXPECTED 2" OF SETTLING OR THREE 6"
LIFTS THEN WETTED WITH ADDITIONAL BSM ADDED TO THE SURFACE AS
NEEDED TO ACHIEVE A FINAL DEPTH OF 18".
3. SUBGRADE SHALL BE GRADED FLAT AND THE SURFACE SHALL BE SCARIFIED
TO A MINIMUM DEPTH OF 3" IMMEDIATELY PRIOR TO PLACEMENT OF
AGGREGATE STORAGE. IF PLANTER IS LINED, SCARIFICATION IS NOT
NECESSARY.
BIOTREATMENT
SOIL18" (MIN)
2" (MIN)MULCH, SEE NOTE 1
CALTRANS CLASS 2 PERMEABLE
AGGREGATE (NON-RECYCLED)
BIOTREATMENT SOIL MEDIA (BSM)
PER BASMAA SPECIFICATIONS
(SEE SMCWPPP C.3 REGULATED
PROJECTS GUIDE APPENDIX K),
SEE NOTE 2AGGREGATE
STORAGE
SCARIFIED AND UNCOMPACTED
SUBGRADE, SEE NOTE 3
PONDING DEPTH
6" (TYP), 12" (MAX)
BIORETENTION COMPONENTSGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
4.1
BC
FILE NO.
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BC
4.1
BIORETENTION BASINGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
5.1
BC
FILE NO.
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PURPOSE:
UNDERDRAINS ARE USED TO COLLECT STORMWATER THAT HAS BEEN FILTERED THROUGH BIOTREATMENT SOIL
AND CONVEY THAT TREATED STORMWATER TO A DESIGNATED OUTLET (E.G., PLANTER OVERFLOW STRUCTURE).
DESIGNER NOTES & GUIDELINES:
1. THE DESIGNER SHOULD INCLUDE UNDERDRAINS IN FACILITY DESIGN IN THE FOLLOWING SCENARIOS:
x INFILTRATION IS PROHIBITED OR IMPRUDENT (E.G., FACILITY NEAR SENSITIVE INFRASTRUCTURE OR
STEEP SLOPES, RISK OF CONTAMINATION IS HIGH OR SITE GROUNDWATER/SOILS ARE CONTAMINATED,
THERE IS POOR INFILTRATION CAPACITY DUE TO TYPE C/D SOILS OR HIGH GROUNDWATER).
x MAXIMUM SURFACE POOL DRAWDOWN PERIOD CANNOT BE ACHIEVED (SEE BB 1.1, BP 1.1, AND BP 5.1).
3. AN OUTLET STRUCTURE AND/OR CLEANOUT(S) TO ALLOW MAINTENANCE ACCESS TO ALL PIPES IS REQUIRED
FOR FACILITIES WITH UNDERDRAINS.
4. UNDERDRAIN PIPE SHALL HAVE A SMOOTH INTERIOR WALL TO FACILITATE MAINTENANCE WITH
PRESSURIZED WATER OR ROOT CUTTING EQUIPMENT.
5. DESIGNER SHOULD CONSIDER THE INSTALLED ELEVATION OF THE UNDERDRAIN PIPE WITHIN THE
BIORETENTION FACILITIES AGGREGATE STORAGE LAYER TO PROMOTE INFILTRATION, BELOW THE
UNDERDRAIN, WHEN FEASIBLE. DESIGNER SHOULD ALSO CONSIDER THE USE OF ORIFICES OR OTHER
CONTROL STRUCTURES TO PROVIDE ADDITIONAL INFILTRATION AND FLOW CONTROL BENEFITS WHERE
APPLICABLE.
6. PIPE MATERIAL SHALL BE DESIGNED PER SMC DPW STANDARDS.
DESIGNER CHECKLIST (MUST SPECIFY, AS APPLICABLE):
UNDERDRAIN MATERIAL TYPE AND SIZE
UNDERDRAIN ELEVATION, SLOPE, AND LOCATION WITHIN BASIN OR PLANTER
PIPE BEDDING MATERIAL SPECIFICATION (i.e. AGGREGATE STORAGE LAYER)
DISCHARGE LOCATION TO OVERFLOW STRUCTURE
CLEANOUT LOCATIONS AND MAINTENANCE ACCESS
ORIFICE FLOW CONTROL STRUCTURE(S), AS APPLICABLE
BC
5.1
BC
5.2
ELEVATED UNDERDRAIN
SLOTTED UNDERDRAIN PIPE 2
AGGREGATE STORAGE
(TYP), SEE
UNDERDRAIN
PIPE (TYP), SEE
DETAIL 2
CONSTRUCTION NOTES:
1. ALL MATERIAL AND WORKMANSHIP FOR UNDERDRAINS SHALL CONFORM TO SMC DPW STANDARD
SPECIFICATIONS AND APPLICABLE CODES.
2. LONGITUDINAL SLOPE OF UNDERDRAIN PIPE SHALL BE 0.5% MINIMUM.
3. UNDERDRAIN PIPE SHALL BE SLOTTED HDPE SDR 17 (PREFERRED) OR ACCEPTABLE SUBSTITUTE
MATERIAL (E.G. PERFORATED PVC PIPE) PER ENGINEERS SPECIFICATION. SINGLE WALL AND DUAL
WALL CORRUGATED HDPE PIPE (AASHTO M252 AND M294 TYPES C, S, AND D) ARE NOT ACCEPTABLE.
4. UNDERDRAIN PIPE SHALL BE SLOTTED TYPE, MEASURING 0.032 INCH WIDE (MAX), SPACED AT 0.25
INCH (MIN), AND PROVIDING A MINIMUM INLET AREA OF 5.0 SQUARE INCH PER LINEAR FOOT OF PIPE.
5. SLOTS SHALL BE ORIENTED PERPENDICULAR TO LONG AXIS OF PIPE, AND EVENLY SPACED AROUND
CIRCUMFERENCE AND LENGTH OF PIPE.
120° (TYP)
CENTERLINE OF SLOT
LOCATION (TYP)
IMPERMEABLE
LINER, SEE GC
1.2
2" (MAX)BC
4.1
UNDERDRAIN WITH LINER
WHERE INFILTRATION PROHIBITED
2" (MIN)
4" DIA (MIN) SLOTTED
HDPE SDR 17 PIPE OR
EQUAL
SLOTS (TYP), SEE
NOTES 5 AND 6
GC
1.1
UNDERDRAIN PLACEMENT ALTERNATIVES
6" (MIN)
BIORETENTION COMPONENTSGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
5.2
BC
FILE NO.
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5.1
BC
5.2
BIORETENTION COMPONENTSGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
6.1
BC
FILE NO.
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PURPOSE:
CHECK DAMS ARE OFTEN USED IN BIORETENTION FACILITIES AT SLOPED LOCATIONS (ALIGNED
PERPENDICULAR TO THE LONGITUDINAL SLOPE OF THE FACILITY) TO REDUCE FLOW VELOCITIES (AND
EROSION) THROUGH THE FACILITY AND TO PROMOTE SURFACE PONDING, SUBSURFACE STORAGE,
AND INFILTRATION OF STORMWATER. CHECK DAMS CAN BE CONSTRUCTED OF A VARIETY OF
MATERIALS INCLUDING CONCRETE, WOOD, METAL, ROCK, OR COMPACTED SOIL.
DESIGNER NOTES & GUIDELINES:
1. THE DESIGNER MUST ADAPT SECTION DRAWINGS TO ADDRESS SITE-SPECIFIC CONDITIONS.
2. THE DESIGNER MUST ESTABLISH THE HEIGHT AND SPACING OF CHECK DAMS BASED ON THE
PONDING DEPTH REQUIRED TO MEET PROJECT HYDROLOGIC PERFORMANCE GOALS AND THE
MAXIMUM DESIRED DROP FROM THE SURROUNDING GRADE TO THE FACILITY BOTTOM. REFER TO
CHECK DAM SPACING GUIDANCE PROVIDED ON THIS DRAWING FOR FURTHER GUIDANCE.
3. THE FACILITY SUBGRADE SHALL BE GRADED FLAT BETWEEN CHECK DAMS.
4. CONCRETE CHECK DAM SHALL MEET STRUCTURAL REQUIREMENTS FOR LATERAL BRACING WHEN
USED AS LATERAL BRACING. SEE BC 1.6 AND BC 1.7.
THE DESIGNER SHALL SPECIFY THE FOLLOWING, AS APPLICABLE:
CHECK DAM TYPE AND MATERIAL
CHECK DAM HEIGHT, WIDTH, AND ELEVATION
CHECK DAM SPACING
BC
6.1
BC
6.2
BC
1.2
2" (MIN) FREEBOARD
6" (MIN)
CONSTRUCTION NOTES:
1. ALL MATERIAL AND WORKMANSHIP FOR CHECK DAM
ASSEMBLY SHALL CONFORM TO SMC DPW STANDARD
SPECIFICATIONS AND APPLICABLE CODES.
2. UNDERDRAIN TO PASS THROUGH CHECK DAM IN
NON-PERFORATED HDPE SDR 17 PIPE.
3. PIPE FITTINGS SHALL BE USED TO ACCOMMODATE CHANGES
IN GRADE, AS NEEDED.
4. CONCRETE CHECK DAM SHALL BE CONTINUOUS (NO JOINTS)
AND REINFORCED WITH #4 BAR, PLACED AT 18 INCHES ON
CENTER, EACH WAY.
5. CONCRETE CHECK DAM SHALL MEET STRUCTURAL
REQUIREMENTS FOR LATERAL BRACING WHEN USED AS
LATERAL BRACING. COORDINATE WITH ENGINEER.
6. TOP OF CHECK DAM TO BE LEVEL WITH CREST ELEVATION
MATCHING PONDING ELEVATION UNLESS NOTCH SIZED TO
CONVEY DESIGN FLOWS PROVIDED.
TOP OF CHECK DAM, SEE NOTE 6
OPTIONAL UNDERDRAIN,
SEE NOTE 2 TOP OF
SIDEWALK
TOP OF RAISED PLANTER WALL
CONCRETE CHECK DAM,
SEE NOTES 4 & 5
OPTIONAL
UNDERDRAIN, SEE
NOTE 2 AND
PROFILE - CONCRETE CHECK DAM 2
SECTION - CONCRETE CHECK DAM 1
CONCRETE CHECK DAM,
SEE NOTES 4 & 5
DRAINAGE NOTCH (TYP)
UNDERDRAIN PIPE
FITTINGS
SEE NOTE 2 & 3
BC
1.5
PLANTER WALL
REINFORCING
(TYP), SEE -
3" (MIN) KEY
BC
5.1
BC
5.2
12" (MIN)
BP
3.2
BP
2.2
EXPANSION JOINT
PER DPW APPROVAL (TYP)
WATER STOP, BOTH SIDES (TYP)
(2) #4 W/ 90° HOOK @ ENDS
10' (MAX)
3" (MIN) KEY
ENERGY DISSIPATION
(TYP)
GC
2.9
GC
2.10
WALL PENETRATION,
SEE
DESIGNER TO SPECIFY
PONDING ELEVATION
BIORETENTION COMPONENTSGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
6.2
BC
FILE NO.
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6.1
BC
6.2
SUBSURFACE INFILTRATION SYSTEMSGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
1.1
SI
FILE NO.
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PURPOSE:
SUBSURFACE INFILTRATION SYSTEMS, ALSO KNOWN AS DRY WELLS, STORMWATER DRAINAGE
WELLS, INFILTRATION GALLERIES, AND SEEPAGE PITS, CONTROL PEAK FLOWS AND VOLUMES OF
STORMWATER RUNOFF THROUGH SUBSURFACE STORAGE AND INFILTRATION INTO NATIVE SOIL.
WATER IS ALSO TREATED AS IT FILTERS THROUGH THE GRAVEL, SAND (IF PROVIDED), AND NATIVE
SOIL.
DESIGNER NOTES & GUIDELINES:
1. THE DESIGNER MUST ADAPT PLAN AND SECTION DRAWINGS TO ADDRESS SITE-SPECIFIC
CONDITIONS.
2. SUBSURFACE INFILTRATION SYSTEMS ARE CONSIDERED CLASS V INJECTION WELLS AND
SUBJECT TO THE U.S. EPA UNDERGROUND INJECTION CONTROL (UIC) PROGRAM. SUBSURFACE
INFILTRATION SYSTEMS MUST BE REGISTERED WITH EPA REGION IX PRIOR TO COMING ONLINE.
3. FIELD-TESTED INFILTRATION RATES OF NATIVE SOILS MUST BE BETWEEN 0.5 (INCHES PER
HOUR) AND 5 (INCHES PER HOUR). FOR SITES WITH INFILTRATION RATES GREATER THAN 5
IN/HR, SUBSURFACE INFILTRATION SYSTEMS MAY STILL BE ALLOWED PROVIDED THAT THE
RUNOFF IS FULLY TREATED USING UPSTREAM BMPS OR BY INSTALLING A MINIMUM OF 18
INCHES OF ASTM C33 SAND WITH AN INFILTRATION RATE LESS THAN 5 INCHES PER HOUR AT
THE BASE OF THE FACILITY.
4. SUBSURFACE STORAGE DRAWDOWN TIME (I.E. TIME FOR MAXIMUM SUBSURFACE STORAGE
VOLUME TO INFILTRATE INTO SUBGRADE AFTER THE END OF A STORM) SHALL BE 48-72 HOURS.
DRAWDOWN TIME IS CALCULATED AS THE MAXIMUM SUBSURFACE STORAGE DEPTH DIVIDED
BY THE NATIVE SOIL INFILTRATION RATE (ADJUSTED BY THE SAFETY FACTOR).
5. SUBSURFACE INFILTRATION SYSTEM SUBGRADES SHOULD BE LEVEL, REGARDLESS OF ANY
LONGITUDINAL SLOPE OF THE SITE, TO PROMOTE EQUAL SUBSURFACE DISTRIBUTION OF
RUNOFF.
6. DEPENDING ON THE HEIGHT AND AREA OF THE PROPOSED SUBSURFACE INFILTRATION
SYSTEM, ADDITIONAL STRUCTURAL CONSIDERATIONS MAY BE REQUIRED TO ADDRESS EARTH
PRESSURE AND/OR SURFACE LOADING.
7. SUBSURFACE INFILTRATION SYSTEMS ARE MOST COMMONLY USED TO MANAGE STORMWATER
RUNOFF FROM ROOFS AND PARKING LOTS, BUT CAN BE USED IN OTHER APPLICATIONS. IN
AREAS WITH HIGH SEDIMENT LOADS, RUNOFF SHOULD PASS THROUGH STORMWATER
PRE-TREATMENT MEASURES TO REMOVE COARSE SEDIMENT THAT CAN CLOG PORE SPACES.
REFER TO THE STORMWATER MANAGEMENT REQUIREMENTS APPENDIX A: BMP FACT SHEETS
FOR ADDITIONAL REQUIREMENTS.
8. SUBSURFACE INFILTRATION SYSTEMS ARE NOT APPROVED AS TREATMENT MEASURES FOR
RUNOFF FROM INDUSTRIAL AREAS, AREAS SUBJECT TO HIGH (GREATER THAN 15,000 VEHICLES
PER DAY) TRAFFIC LOADING, AUTOMOTIVE REPAIR SHOPS, CAR WASHES, FLEET STORAGE
AREAS, NURSERIES, SITES THAT STORE CHEMICALS OR HAZARDOUS MATERIALS, OR OTHER
LAND USES THAT POSE A HIGH THREAT TO WATER QUALITY.
9. SUBSURFACE INFILTRATION SYSTEMS SHOULD NOT BE USED IN AREAS OF KNOWN OR
PRESUMED CONTAMINATED SOIL OR GROUNDWATER, AREAS WITH CURRENT OR
HISTORICAL INDUSTRIAL USE, AREAS WITHIN 100 FEET OF CURRENT OR HISTORICAL
UNDERGROUND STORAGE TANKS, FILLED FORMER BAY, MARSH OR CREEK AREAS, OR
AREAS WITHIN 150 FEET OF A CURRENT OR HISTORICAL HIGHWAY. SEE SETBACK
REQUIREMENTS TABLE ON SI 1.2.
10. SMALL SYSTEMS (TYPICALLY A FEW FEET IN WIDTH) ARE KNOWN AS DRY WELLS AND
ARE RECOMMENDED FOR SMALL DRAINAGE AREAS WITH LOW POLLUTANT LOADINGS,
SUCH AS ROOFTOPS LESS THAN 0.25 ACRES IN SIZE. LARGER SYSTEMS (TYPICALLY 10
TO 100 FEET IN WIDTH) ARE KNOWN AS INFILTRATION GALLERIES AND CAN BE USED TO
RECEIVE RUNOFF FROM DRAINAGE AREAS TYPICALLY UP TO 5 ACRES IN SIZE.
11. THE DRAWINGS PROVIDED DO NOT COVER DESIGNS THAT UTILIZE PROPRIETARY
STORAGE, DISTRIBUTION, AND/OR STRUCTURAL SYSTEMS OTHER THAN PREFABRICATED
DRY WELL STRUCTURES, WHICH HAVE BEEN SHOWN IN A GENERIC WAY. REFER TO THE
MANUFACTURER'S RECOMMENDATIONS FOR ALL PROPRIETARY SYSTEMS.
SI
1.1
SI
1.2
SI
2.1
SI
2.2
SI
3.1
SI
3.2
GENERAL UTILITY NOTES:
1. MINIMUM UTILITY SETBACKS AND PROTECTION MEASURES MUST CONFORM TO CURRENT
JURISDICTIONAL ASSET PROTECTION STANDARDS. IN THE ABSENCE OF THESE STANDARDS,
THE DESIGN SHALL REFER TO CHAPTER 3 OF SMCWPPP GI DESIGN GUIDE FOR BEST
PRACTICES AND COORDINATE DIRECTLY WITH RELEVANT UTILITY PROVIDERS FOR
REQUIREMENTS. SEE UTILITY CROSSING DESIGNER NOTES ON GC 2.1.
2. PROVIDE UTILITY TRENCH DAM, ANTI-SEEP COLLAR, OR EQUIVALENT TO PREVENT
PREFERENTIAL FLOW OF WATER FROM INFILTRATIVE FACILITY INTO UTILITY TRENCH FROM
CAUSING DAMAGE DOWNSTREAM. ENGINEER TO EVALUATE SITE CONDITIONS AND NEED FOR
TRENCH DAM. REFER TO GC2.12 FOR GUIDANCE ON UTILITY TRENCH DAM DESIGN.
3. PROPOSED UTILITY LINES TO BE LOCATED OUTSIDE OF FACILITY.
RELATED COMPONENTS
UTILITY CROSSINGS:
UTILITY CONFLICTS:
OBSERVATION PORTS:
CLEANOUTS:GC
5.1
-GC
2.1
GC
2.12
-GC
4.1
GC
4.3
-GC
3.1
GC
3.3
SI
4.1
SUBSURFACE INFILTRATION SYSTEMSGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
1.2
SI
FILE NO.
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LAYOUT REQUIREMENTS:
REFER TO THE SMCWPPP C.3 REGULATED PROJECTS GUIDE AND SMCWPPP DESIGN GUIDE FOR MORE DETAILED
INFORMATION ON SITING AND DESIGN REQUIREMENTS FOR INFILTRATION BASED BMPS.
1. STANDARD SETBACK REQUIREMENTS PER THE SMCWPPP C.3 REGULATED PROJECTS GUIDE:
18 FEET OR 1:1 SLOPE FROM BOTTOM OF BUILDING FOUNDATION, UNLESS DIFFERENT SETBACK IS ALLOWED BY
GEOTECHNICAL ENGINEER OR CUTOFF WALL IS PROVIDED.
100 FEET FROM GROUNDWATER WELLS USED FOR DRINKING WATER, OR ANY KNOWN WATER SUPPLY WELLS, SEPTIC
SYSTEMS, AND UNDERGROUND STORAGE TANKS.
2. REFER TO SMCWPPP GI DESIGN GUIDE CHAPTER 3 AND OTHER APPLICABLE SMC REQUIREMENTS FOR ADDITIONAL
SETBACK REQUIREMENTS REGARDING WATER AND SEWER INFRASTRUCTURE.
3. MINIMUM 4-FOOT VERTICAL SEPARATION FROM BASE OF SUBSURFACE INFILTRATION SYSTEM TO BEDROCK IS REQUIRED.
4. MINIMUM 10-FOOT VERTICAL SEPARATION FROM BOTTOM OF DRAIN ROCK TO SEASONAL HIGH GROUNDWATER.
DESIGNER CHECKLIST (MUST SPECIFY, AS APPLICABLE):
SUBSURFACE INFILTRATION SYSTEM WIDTH AND LENGTH
DEPTH AND TYPE OF AGGREGATE STORAGE LAYER
DEPTH AND TYPE OF FILTER SAND, IF REQUIRED
ELEVATIONS AND CONTROL POINTS AT EVERY CORNER
AGGREGATE STORAGE SPECIFICATIONS AND/OR DRY WELL TYPE AND
DIMENSIONS
ELEVATIONS OF EACH PIPE INLET AND OVERFLOW INVERT
TYPE AND DESIGN OF SUBSURFACE INFILTRATION COMPONENTS (E.G.
INLETS, OVERFLOWS, OBSERVATION WELLS)
SETBACK DIMENSIONS TO BEDROCK, HIGH GROUNDWATER TABLE,
PROPERTY LINES, FOUNDATIONS, WATER SUPPLY WELLS, SEWER
MAINS, AND GROUND SLOPES OF 15% OR GREATER, AS APPLICABLE.
SEE SMCWPPP GI DESIGN GUIDE CHAPTER 3.
TYPE AND SIZE OF PRETREATMENT MEASURE, AS NESSESARY
HYDROLOGIC
SOIL GROUP SOIL TYPE CORRESPONDING UNIFIED SOIL CLASSIFICATION DESCRIPTION
A SAND, LOAMY
SAND, OR SANDY
LOAM
GW - WELL-GRADED GRAVELS, SANDY GRAVELS
GP - GAP-GRADED OR UNIFORM GRAVELS, SANDY GRAVELS
GM - SILTY GRAVELS, SILTY SANDY GRAVELS
SW - WELL-GRADED, GRAVELLY SANDS
SP - GAP-GRADED OR UNIFORM SANDS, GRAVELLY SANDS
LOW RUNOFF POTENTIAL. SOILS HAVING HIGH
INFILTRATION RATES EVEN WHEN THOROUGHLY
WETTED AND CONSISTING CHIEFLY OF DEEP, WELL
TO EXCESSIVELY DRAINED SANDS OR GRAVELS.
B SILT LOAM OR
LOAM
SM - SILTY SANDS, SILTY GRAVELLY SANDS
MH - MICACEOUS SILTS, DIATOMACEOUS SILTS, VOLCANIC ASH
SOILS HAVING MODERATE INFILTRATION RATES WHEN
THOROUGHLY WETTED AND CONSISTING CHIEFLY OF
MODERATELY DEEP TO DEEP, MODERATELY WELL TO
WELL-DRAINED SOILS WITH MODERATELY FINE TO
MODERATELY COARSE TEXTURES.
C SANDY CLAY LOAM
ML - SILTS, VERY FINE SANDS, SILTY AND CLAYEY FINE SANDS
SOILS HAVING SLOW INFILTRATION RATES WHEN
THOROUGHLY WETTED AND CONSISTING CHIEFLY OF
SOILS WITH A LAYER THAT IMPEDES DOWNWARD
MOVEMENT OF WATER, OR SOILS WITH MODERATELY
FINE TO FINE TEXTURES.
D CLAY LOAM,
SANDY CLAY,
SILTY CLAY, OR
CLAY
GC - CLAYEY GRAVELS, CLAYEY SANDY GRAVELS
SC - CLAYEY SANDS, CLAYEY GRAVELLY SANDS
CL - LOW PLASTICITY CLAYS, SANDY OR SILTY CLAYS
OL - ORGANIC SILTS AND CLAYS OF LOW PLASTICITY
CH - HIGHLY PLASTIC LAYS AND SANDY CLAYS
OH - ORGANIC SILTS AND CLAYS OF HIGH PLASTICITY
HIGH RUNOFF POTENTIAL. SOILS HAVING VERY SLOW
INFILTRATION RATES WHEN THOROUGHLY WETTED
AND CONSISTING CHIEFLY OF CLAY SOILS WITH A
HIGH SWELLING POTENTIAL, SOILS WITH A
PERMANENT HIGH WATER TABLE, AND SHALLOW
SOILS OVER NEARLY IMPERVIOUS MATERIAL.
SOIL TYPE GUIDANCE:
SI
1.1
SI
1.2
SI
2.1
SI
2.2
SI
3.1
SI
3.2
SI
4.1
PLAN- ALTERNATIVE 1 1
PLAN - ALTERNATIVE 2 2
WIDTH VARIES
18' (MIN) FOR
INFILTRATION FACILITIES
INTERIOR OR EXTERIOR
DOWNSPOUT
ADJACENT BUILDING WALL
WI
D
T
H
V
A
R
I
E
S
PRE-TREATMENT (IF REQUIRED),
DESIGNER TO SPECIFY
LE
N
G
T
H
V
A
R
I
E
S
A
SI
2
.
2
CONSTRUCTION NOTES:
1. AVOID COMPACTION AND DISTURBANCE OF EXISTING SOIL WITHIN 5 FEET ADJACENT TO AND BELOW
INFILTRATION FACILITIES DURING CONSTRUCTION.
2. ROUTE OVERFLOW PIPE TO THE STORM SEWER OR TO ANOTHER BMP FOR FURTHER TREATMENT AS
SHOWN ON THE DESIGN PLANS.
3. PROVIDE UTILITY TRENCH DAM OR EQUIVALENT MEASURE OUTSIDE OF THE INFILTRATION FACILITY
AT PIPE PENETRATIONS TO PREVENT PREFERENTIAL FLOW FROM SUBSURFACE INFILTRATION
SYSTEM INTO UTILITY TRENCHES. COORDINATE WITH ENGINEER.
PRECEDING BMP/
PRETREATMENT
SYSTEM OUTLET,
DESIGNER TO SPECIFY
CLEANOUT
(TYP), SEE
LENGTH VARIES
UTILITY TRENCH DAM
(TYP). DESIGNER TO
SPECIFY AS NEEDED.
SEE NOTE 3 AND GC
2.12
UNDISTURBED NATIVE
SOIL, SEE NOTE 1
OVERFLOW,
SEE NOTE 2
CLEANOUT
(TYP), SEE
OVERFLOW,
SEE NOTE 2
GC
5.1
GC
5.1
OBSERVATION
PORT, SEE SI
4.1
GEOTEXTILE,
SEE SI
2.2
OBSERVATION PORT, SEE
GEOTEXTILE, SEE
SI
4.1
UTILITY TRENCH DAM
(TYP). DESIGNER TO
SPECIFY AS NEEDED.
SEE NOTE 3 AND GC
2.12
SI
2.2
SUBSURFACE INFILTRATION SYSTEMSGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
2.1
SI
FILE NO.
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SI
1.1
SI
1.2
SI
2.1
SI
2.2
SI
3.1
SI
3.2
SI
4.1
1' (MIN) COVER
INTERIOR OR EXTERIOR
DOWNSPOUT
SECTION - ALTERNATIVE 1 A
WIDTH VARIES
SEE DESIGNER NOTES
18' (MIN) FOR
INFILTRATION FACILITIES
CONSTRUCTION NOTES:
1. REFER TO SMC DPW STANDARD SPECIFICATIONS AND
APPLICABLE CODES FOR CONVEYANCE CONNECTION
REQUIREMENTS.
2. AVOID COMPACTION AND DISTURBANCE OF EXISTING SOIL
ADJACENT TO AND BELOW INFILTRATION FACILITIES DURING
CONSTRUCTION.
3. SCARIFY SUBGRADE TO A DEPTH OF 6 INCHES (MIN)
IMMEDIATELY PRIOR TO PLACEMENT OF AGGREGATE STORAGE.
4. SIDEWALLS AND TOP OF AGGREGATE STORAGE SHALL BE
LINED WITH A GEOTEXTILE TO PREVENT MIGRATION OF
ADJACENT SOILS INTO SUBSURFACE INFILTRATION SYSTEM.
5. SUBSURFACE DISTRIBUTION PIPING SHALL BE A 6 INCHES (MIN)
IN DIAMETER.
6. PROVIDE UTILITY TRENCH DAM OR EQUIVALENT MEASURE
OUTSIDE OF THE INFILTRATION FACILITY AT PIPE
PENETRATIONS TO PREVENT PREFERENTIAL FLOW FROM
SUBSURFACE INFILTRATION SYSTEM INTO UTILITY TRENCHES.
COORDINATE WITH ENGINEER.
ADJACENT
BUILDING WALL
CONVEYANCE
CONNECTION AT 1%
(MIN), SEE NOTE 1
ADJACENT
SURFACE,
VARIES
2' (MIN)
3/4" TO 3" DIA.
DOUBLE-WASHED
COARSE AGGREGATE
(E.G. ASTM NO. 57, 2, OR 3)
SCARIFIED AND UNCOMPACTED SUBGRADE FOR
INFILTRATING FACILITIES, SEE NOTES 2 & 3
1' (MIN) COVER
EARTHEN
COVER SOIL
SI
2.1
DISTRIBUTION PIPING
SEE NOTE 5 AND PRE-TREATMENT
STRUCTURE
(IF REQUIRED)
FILTER SAND (IF REQUIRED),
DESIGNER TO SPECIFY
DOWNSPOUT DAYLIGHT
OVERFLOW (OPTIONAL)
SPLASH BLOCK
OR COBBLES
ANGLE SIDES OF EXCAVATION
IF REQUIRED BY
GEOTECHNICAL ENGINEER
OVERFLOW (SIZE AND LAYOUT
SPECIFIED BY DESIGNER)
GEOTEXTILE, SEE NOTE 4
UTILITY TRENCH DAM
(TYP). DESIGNER TO
SPECIFY AS NEEDED.
SEE NOTE 6 AND GC
2.12
SUBSURFACE INFILTRATION SYSTEMSGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
2.2
SI
FILE NO.
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SI
1.1
SI
1.2
SI
2.1
SI
2.2
SI
3.1
SI
3.2
SI
4.1
PLAN- ALTERNATIVE 1 1 PLAN - ALTERNATIVE 2 2
DIAMETER VARIES
18' (MIN) FOR
INFILTRATION FACILITIES
ADJACENT
BUILDING WALL
A
SI
3
.
2
CONSTRUCTION NOTES:
1. AVOID COMPACTION AND DISTURBANCE OF EXISTING SOIL WITHIN 5 FEET ADJACENT TO AND BELOW INFILTRATION FACILITIES
DURING CONSTRUCTION.
2. PREFABRICATED DRY WELLS SHALL HAVE SMALL DIAMETER PERFORATIONS TO PREVENT LATERAL MOVEMENT OF AGGREGATE
INTO WELL AND SHALL BE SUFFICIENT IN NUMBER TO ALLOW FOR THE DRAINAGE OF THE STRUCTURE WITHIN 48 HOURS.
3. ROUTE OVERFLOW PIPE TO THE STORM SEWER OR TO ANOTHER BMP FOR FURTHER TREATMENT AS SHOWN ON THE DESIGN
PLANS.
4. PROVIDE UTILITY TRENCH DAM OR EQUIVALENT MEASURE OUTSIDE OF THE INFILTRATION FACILITY AT PIPE PENETRATIONS TO
PREVENT PREFERENTIAL FLOW FROM SUBSURFACE INFILTRATION SYSTEM INTO UTILITY TRENCHES. COORDINATE WITH
ENGINEER.
PRECEDING BMP/
TREATMENT OUTLET
(BIORETENTION
UNDERDRAIN SYSTEM
SHOWN AS EXAMPLE)
WIDTH
VARIES
INTERIOR OR EXTERIOR
DOWNSPOUT
PRE-TREATMENT (IF REQUIRED),
DESIGNER TO SPECIFY
UTILITY TRENCH DAM
(TYP). DESIGNER TO
SPECIFY AS NEEDED.
SEE NOTE 4 AND GC
2.12 UNDISTURBED
NATIVE SOIL,
SEE NOTE 1
PERFORATIONS FOR
DRAINAGE, SEE NOTE 2
WIDTH VARIES
DIAMETER VARIES
PREFABRICATED CONCRETE,
METAL, OR PLASTIC
STRUCTURE. DESIGNER TO
SELECT SIZE AND SHAPE
FOR SITE CONDITIONS AND
LOADING.
CLEANOUT OR MANHOLE
ACCESS (IF REQUIRED),
DESIGNER TO SPECIFY
12" (MIN)
OVERFLOW,
SEE NOTE 3
OVERFLOW,
SEE NOTE 3
WALL PENETRATION
OR EQUAL, SEE GC
2.9
GC
2.10
WALL PENETRATION
OR EQUAL, SEE GC
2.9
GC
2.10
UTILITY TRENCH DAM
(TYP). DESIGNER TO
SPECIFY AS NEEDED.
SEE NOTE 4 AND GC
2.12
SOLID DRAIN PIPE
SUBSURFACE INFILTRATION SYSTEMSGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
3.1
SI
FILE NO.
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SI
1.1
SI
1.2
SI
2.1
SI
2.2
SI
3.1
SI
3.2
SI
4.1
1' (MIN) COVER
1' (MIN) COVER
SECTION - ALTERNATIVE 1 A
DIAMETER VARIES
2' - 5' (TYP)
18' (MIN) FOR
INFILTRATION FACILITIES
CONSTRUCTION NOTES:
1. REFER TO SMC DPW STANDARD SPECIFICATIONS AND
APPLICABLE CODES FOR CONVEYANCE CONNECTION
REQUIREMENTS.
2. AVOID COMPACTION AND DISTURBANCE OF EXISTING SOIL
WITHIN 5 FEET ADJACENT TO AND BELOW INFILTRATION
FACILITIES DURING CONSTRUCTION.
3. SCARIFY SUBGRADE TO A DEPTH OF 6 INCHES (MIN)
IMMEDIATELY PRIOR TO PLACEMENT OF GRAVEL STORAGE.
4. SIDEWALLS AND TOP OF GRAVEL STORAGE SHALL BE LINED
WITH A PERMEABLE FILTER FABRIC TO PREVENT LATERAL
SOIL MOVEMENT.
5. PROVIDE UTILITY TRENCH DAM OR EQUIVALENT MEASURE
OUTSIDE OF THE INFILTRATION FACILITY AT PIPE
PENETRATIONS TO PREVENT PREFERENTIAL FLOW FROM
SUBSURFACE INFILTRATION SYSTEM INTO UTILITY
TRENCHES. COORDINATE WITH ENGINEER.
2' (MIN)
INTERIOR OR EXTERIOR
DOWNSPOUT
ADJACENT
BUILDING WALL
ADJACENT
SURFACE, VARIES
SCARIFIED AND UNCOMPACTED SUBGRADE
FOR INFILTRATING FACILITIES, SEE NOTES 2 & 3
EARTHEN COVER SOIL
FILTER SAND (IF REQUIRED),
DESIGNER TO SPECIFY
DOWNSPOUT
OVERFLOW PIPE
CONVEYANCE
CONNECTION AT
1% MIN., SEE NOTE 1
12" (MIN)
PRE-TREATMENT
STRUCTURE
(IF REQUIRED),
DESIGNER TO
SPECIFY
ANGLE SIDES OF EXCAVATION
IF REQUIRED BY
GEOTECHNICAL ENGINEER
CLEANOUT OR ACCESS
MANHOLE (IF REQUIRED),
DESIGNER TO SPECIFY
SPLASH BLOCK
OR COBBLES
3/4" TO 3" DIA.
DOUBLE-WASHED
COARSE AGGREGATE
(E.G. ASTM NO. 57, 2, OR 3)
OVERFLOW
DRYWELL STRUCTURE
PERFORATIONS FOR DRAINAGE
DESIGNER TO SPECIFY
GEOTEXTILE, SEE NOTE 7
UTILITY TRENCH DAM
(TYP). DESIGNER TO
SPECIFY AS NEEDED.
SEE NOTE 5 AND GC
2.12
VARIES
CLAYCLAY
17
TO STORM
DRAIN
(IF NEEDED)
KEY:
1. UNDERDRAIN, MIN. 4” DIA. PVC SDR 35 SLOTTED OR PERFORATED PIPE OR LARGER AS
NEEDED TO CONVEY PEAK TREATED FLOWRATE WITH MINIMAL HEAD LOSS.
2. 6” (MIN) SOLID INLET PIPE OR OTHER.
3. LOW FLOW ORIFICE.
4. STABILIZED BACKFILL - TWO-SACK SLURRY MIX.
5. SIDEWALK PER MUNICIPAL STANDARDS.
6. COMPACTED BASE MATERIAL.
7. ACCESS HATCH WITH SHUT OF VALVE SWITCH. CONNECTED TO SHUT OF VALVE IN INLET
PIPE.
8. MAINTENANCE HOLE COS TYPE 204-204 MH A OR B. ¾” I.D. MIN OBSERVATION PORT.
9. MANHOLE CONE - MODIFIED FLAT BOTTOM.
10. EXISTING SOILS.
11. COMPACTED BACKFILL.
12. PRE-CAST OR INSITU CAST CONTROL VAULT.
13. ROCK - WASHED, SIZED BETWEEN 3/8” AND 1-1/2".
14. PERFORATED BASE OF CONTROL VAULT
15. DRILLED SHAFT WITH 6” WELDED STEEL OR THREADED PVC CASING
16. 6 - 8” O.D. WELDED WIRE STAINLESS STEEL WELL SCREEN OR THREADED PVC SLOTTED
SCREEN. SCREEN LENGTH + LENGTH + SLOT WIDTH TO BE DETERMINED IN ACCORDANCE
WITH LOCAL CONSTRAINTS .I.E. DISTANCE BETWEEN CLAY LAYER AND MIN. 10FT ABOVE
SEASONAL HIGH GROUNDWATER LEVEL
17. PVC STORMDRAIN CONNECTOR PIPE. SAME DIAMETER AS INFLOW PIPE TO CONTROL
VAULT.
18. UTILITY TRENCH DAM PER GC 2.12. DESIGNER TO SPECIFY AS NEEDED.
DESIGNER NOTES:
1. SEE SI 1.1 AND SI 1.2 FOR ADDITIONAL GUIDANCE.
2. BOTTOM WIDTH SHALL BE 2 FEET MINIMUM.
3. IF THE LONGITUDINAL SLOPE OF THE DRY WELL EXCEEDS 6%, CHECK DAMS SHALL BE USED.
4. SHUT-OFF VALVE MAY BE LOCATED IN THE PRETREATMENT FACILITY IF DESIRED. DESIGNER
TO SPECIFY LOCATION AND WHETHER STRUCTURAL SUPPORT IS REQUIRED.
5. IN AREAS WITHOUT A STORM DRAIN SYSTEM, THE MAINTENANCE HOLE SURFACE INVERT
MUST BE ABOVE THE PRETREATMENT FACILITY OVERFLOW ELEVATION.
6. ALTERNATIVE PRODUCTS SUCH AS VENDOR SUPPLIED DRY WELL PRODUCTS MAY BE USED
AS A SUBSTITUTE PROVIDED THAT THE ALTERNATIVE PRODUCT IS EQUAL.
EXISTING STORM DRAIN EXISTING STORM DRAIN
SIDEWALK
1
DRY WELL
10
2
9
SIDEWALK
INLET ELEV.
(SIE):
OVERFLOW
STRUCTURE
ELEV. (OE)
3
4 5 6
MIN. 10' ABOVE
GROUNDWATER
2
8
1
CURB
14
8
13
TO STORM
DRAIN
12
11
15
16
7
ANY TYPE OF PRETREATMENT MAY
BE USED AS ALLOWED BY LOCAL
JURISDICTION. STORMWATER
PLANTER ILLUSTRATED FOR
CONCEPTUAL PURPOSES.
18
PLAN
SECTION
SUBSURFACE INFILTRATION SYSTEMSGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
4.1
SI
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1.2
SI
2.1
SI
2.2
SI
3.1
SI
3.2
SI
4.1
GENERAL COMPONENTSGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
1.1
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1.1
PURPOSE:
IMPERMEABLE LINERS IN GREEN INFRASTRUCTURE CAN BE USED TO RESTRICT MOVEMENT OF WATER
INTO UNDERLYING AND/OR ADJACENT SOILS AND/OR AGGREGATES TO PROTECT SENSITIVE
INFRASTRUCTURE (E.G., IMPERMEABLE ROADWAY BASE, FOUNDATIONS, UTILITIES), MITIGATE RISK OF
GEOLOGIC HAZARDS (E.G., STEEP SLOPES, CONTAMINATED SOILS), OR OTHER SITE-SPECIFIC CONDITIONS)
DESIGNER NOTES & GUIDELINES:
1. THE DESIGNER MUST ADAPT DRAWINGS TO ADDRESS SITE-SPECIFIC CONDITIONS.
2. THE DESIGNER AND/OR GEOTECHNICAL ENGINEER SHOULD ASSESS THE RISK OF WATER LEAKAGE
FROM THE PLANTER AND DETERMINE THE LINER EXTENTS AND LINER CONNECTION REQUIREMENTS
(E.G., WATER TIGHT, SOIL TIGHT), DEPENDING ON DEGREE OF PROTECTION NECESSARY TO PROTECT
ADJACENT INFRASTRUCTURE.
6. CONSIDER PLACING GEOTEXTILE ON PREPARED SUBGRADE PRIOR TO PLACEMENT OF LINER TO
PROTECT LINER FROM DAMAGE DURING INSTALLATION.
7. DEPENDING ON ANTICIPATED FACILITY MAINTENANCE, IT MAY BE PRUDENT TO INCLUDE A GEOTEXTILE
OVER THE LINER TO PROVIDE AN ADDITIONAL BARRIER BETWEEN LINER AND MAINTENANCE
EQUIPMENT OR TO PROTECT AGAINST AGGRESSIVE PUNCTURES DURING PLACEMENT AND
COMPACTION.
DESIGNER CHECKLIST (MUST SPECIFY, AS APPLICABLE):
LINER TYPE AND EXTENTS (E.G., FULL LINER, PARTIAL LINER)
LINER ANCHOR TYPE (E.G., WATER TIGHT, SOIL TIGHT)
LINER JOINT WELDING/SEALING REQUIREMENTS
OTHER CRITICAL PROJECT-SPECIFIC PLACEMENT REQUIREMENTS
WATER TIGHT LINER ATTACHMENT AT WALL/STRUCTURE 3
3" (MIN)
SEE NOTE 6
2" (MIN)
1/4" x 2" HIT ANCHOR, 12" ON CENTER
1/8" x 2" (MIN) ALUMINUM
BATTEN STRIP (BAR STOCK)
NEOPRENE RUBBER PAD, SEE NOTE 7
30 MIL LINER, SEE
BUTYL MASTIC
CAULK, SEE NOTE 7
TRIM LINER TO
TOP EDGE OF
BATTEN STRIP
CONCRETE
POLYURETHANE ELASTOMERIC
SEALANT, SEE NOTE 8
CONSTRUCTION NOTES:
1. LINER SHALL BE HDPE CONFORMING TO GEOSYNTHETIC RESEARCH INSTITUTE (GRI)
GM13 OR LLDPE CONFORMING TO GRI GM17.
2. LINER SHALL LAY FLUSH WITH GROUND WITH NO AIR VOIDS BELOW THE LINER PRIOR TO
BACKFILLING MATERIAL ABOVE THE LINER. CONTOUR THE SUBGRADE AS NEEDED TO
ENSURE LINER LAYS FLUSH WITH GROUND.
3. OVERLAP LINER PER MANUFACTURER'S RECOMMENDATIONS.
4. ALL SEAMS SHALL BE WELDED PER MANUFACTURER'S RECOMMENDATIONS UNLESS
OTHERWISE SPECIFIED.
5. SECURE LINER CONTINUOUSLY WITH DOUBLE-SIDED TAPE ALONG LINER EDGE AND
SINGLE SIDED TAPE ALONG THE TOP EDGE OF LINER TO HOLD LINER IN PLACE DURING
BACKFILLING.
6. TOP OF LINER TO BE AT LEAST 3" BELOW FINISH GRADE OF BIOTREATMENT SOIL MEDIA
EXCEPT WHEN ADJACENT TO BUILDING WALL. WHEN ADJACENT TO BUILDING WALL,
LINER OR EQUAL WATERPROOFING SHALL EXTEND TO TOP OF FREEBOARD ELEVATION.
7. APPLY BUTYL MASTIC CAULK, BATTEN STRIP, AND NEOPRENE RUBBER PAD
CONTINUOUSLY ALONG TOP EDGE OF LINER.
8. APPLY BEAD OF POLYURETHANE ELASTOMERIC SEALANT CONTINUOUSLY ALONG TOP
EDGE OF BATTEN STRIP ASSEMBLY.
BIORETENTION
PLANTER
30 MIL LINER, SEE
NOTES 1 THROUGH 4
SOIL/AGGREGATE/CONCRETE
SOIL TIGHT LINER ATTACHMENT AT WALL/STRUCTURE 2IMPERMEABLE LINER 1
WRAP LINER 6" UP SIDE
OF WALL/STRUCTURE
LINER ATTACHMENT,
SEE NOTE 5
CONCRETE
1
-
GENERAL COMPONENTSGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
1.2
GC
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1.1
GENERAL COMPONENTSGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
2.1
GC
FILE NO.
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2.4
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2.2
GC
2.3
GC
2.5
GC
2.6
GC
2.7
GC
2.8
GC
2.9
GC
2.10
GC
2.11
GC
2.12
GC
2.1
PURPOSE:
WHEN SITING GREEN INFRASTRUCTURE (GI) FACILITIES, THE DESIGNER SHOULD LOCATE AND
ASSESS ALL KNOWN UTILITY CROSSINGS AND CONFLICTS AND ADJUST THE DESIGN TO AVOID AS
MANY EXISTING UTILITIES AS POSSIBLE. THE CRITICALITY OF UTILITY CONFLICTS IN TERMS OF
THEIR POTENTIAL IMPACT TO THE PROJECT'S DESIGN PERFORMANCE, COST, AND SCHEDULE
SHOULD BE CAREFULLY EVALUATED DURING THE PLANNING PHASE.
THE PURPOSE OF THE FOLLOWING TYPICAL UTILITY CROSSING DETAILS IS TO ALERT THE
DESIGNERS TO COMMON UTILITY CROSSINGS THAT OCCUR ON GI PROJECTS WITHIN THE PUBLIC
RIGHT-OF-WAY AND PROVIDE GENERAL GUIDANCE ON THE PROTECTION OF THESE UTILITIES.
THEY ARE PROVIDED AS TYPICAL APPLICATIONS AND DO NOT REPRESENT APPROVED COUNTY
UTILITY STANDARDS AND SPECIFICATIONS. IN ADDITION TO THESE TYPICAL DETAILS, DESIGNERS
MUST FOLLOW ALL APPLICABLE LOCAL AND FEDERAL REGULATIONS ASSOCIATED WITH THEIR
PROJECT.
DESIGNER NOTES & GUIDELINES:
1. THE DESIGNER MUST ADAPT DRAWINGS TO ADDRESS SITE-SPECIFIC CONDITIONS AND UTILITY
REQUIREMENTS AND OBTAIN APPROVAL FROM ALL RELEVANT UTILITY PROVIDERS PRIOR TO
CONSTRUCTION.
x CALIFORNIA WATER SERVICE OR SMC PUBLIC WORKS FOR DOMESTIC/FIRE WATER
x SMC PUBLIC WORKS FOR SANITARY SEWER, STORM DRAIN, AND STREET LIGHTS
x PACIFIC GAS ELECTRIC (PGE) FOR ELECTRIC/GAS/UTILITY POLES
2. MINIMUM UTILITY SETBACKS AND PROTECTION MEASURES MUST CONFORM TO CURRENT
JURISDICTIONAL ASSET PROTECTION STANDARDS. IN THE ABSENCE OF THESE STANDARDS,
THE DESIGNER SHALL REFER TO CHAPTER 3 OF THE SMCWPPP GI DESIGN GUIDE FOR BEST
PRACTICES AND COORDINATE DIRECTLY WITH RELEVANT UTILITY PROVIDERS FOR
REQUIREMENTS.
3. UTILITY CONFLICTS SHALL BE MITIGATED PER SMC DPW STANDARDS AND OTHER UTILITY
PROVIDER REQUIREMENTS. ENGINEER TO EVALUATE CONDITIONS AND NEED TO INCLUDE
MEASURES TO ENSURE WATER TIGHT UTILITY PENETRATIONS THROUGH PLANTER WALL, AS
NEEDED AND TO PREVENT PREFERENTIAL FLOW INTO UTILITY TRENCHES (E.G., WATER STOP,
TRENCH BLOCK, OR TRENCH COLLAR). (REFER TO GC 2.9 - 2.12)
4. THE DESIGNER MUST DETERMINE THE TYPE OF PROTECTION MEASURE(S) REQUIRED BASED
ON THE SITE-SPECIFIC CONDITIONS, UTILITY REQUIREMENTS, AND THE FUNCTION THE
PROTECTION MEASURE MUST PERFORM. THE FOLLOWING ARE BRIEF DESCRIPTIONS OF THE
PROTECTION MEASURES INCLUDED IN THESE DETAILS:
a. SOIL OR ENGINEERED FILL WITH OVERLYING IMPERMEABLE LINER: PROTECTS UTILITY
FROM DAMAGE DURING FUTURE TRENCHING, EXCAVATION, AND LANDSCAPE ACTIVITIES.
THE LINER PREVENTS PREFERENTIAL FLOW OF WATER INTO THE UTILITY TRENCH. THESE
METHODS ARE GENERALLY ONLY ACCEPTABLE WHEN THE FACILITY DOES NOT INCLUDE
AN UNDERDRAIN OR WHEN THE LINER CAN BE LOCATED BELOW THE INVERT OF THE
UNDERDRAIN.
b. SLEEVE/CASING: BY HOUSING THE UTILITY PIPE WITHIN A LARGER CARRIER PIPE OR
APPROVED SPLIT SLEEVE PRODUCT, THE UTILITY PIPE CAN BE REPLACED IF NEEDED IN
THE FUTURE WITHOUT SIGNIFICANT IMPACT TO THE OVERLYING INFRASTRUCTURE. THE
SLEEVE ALSO PROTECTS THE PIPE FROM IMPACT DURING CONSTRUCTION AND FUTURE
TRENCHING, EXCAVATION, AND LANDSCAPE ACTIVITIES. ADDITIONALLY, SLEEVES CAN BE
USED TO SEAL THE UTILITY FROM THE INFILTRATED STORMWATER AND/OR PROTECT THE
INFILTRATION FACILITY FROM SEWER LATERAL LEAKAGES. SEE THE UTILITY SLEEVE
GUIDANCE.
c. UTILITY TRENCH DAM: WHERE UTILITY TRENCHES CROSS UNDER INFILTRATIVE
FACILITIES, SUBSURFACE WATER MAY PREFERENTIALLY FLOW THROUGH THE TRENCH
AND CAUSE DAMAGE TO DOWNSTREAM INFRASTRUCTURE. RISKS INCLUDE BACKFILL
EROSION, CREATION OF VOIDS, THE DEGRADATION OF OVERLYING FILL/PAVEMENT, AND
SUBSURFACE WATER BEING DIRECTED TO BUILDING FOUNDATIONS OR BASEMENTS.
UTILITY TRENCH DAMS PLACED OUTSIDE OF THE INFILTRATION FACILITY FOOTPRINT
PREVENT WATER FROM TRAVELING FURTHER ALONG THE UTILITY TRENCH.
d. INSULATING WRAP: PROVIDES IMPACT AND WATER PROTECTION FOR EXISTING SHALLOW
UTILITY SERVICE LINES THAT ARE REMAINING IN PLACE WITHIN INFILTRATION FACILITIES.
6. FOR PERVIOUS PAVEMENT FACILITIES, UTILITY CROSSINGS SHOULD BE BELOW THE BOTTOM
OF THE STRUCTURAL PAVEMENT SECTION, WHENEVER POSSIBLE. IF UTILITIES ENCROACH
INTO THIS SECTION, THE ENGINEER SHALL CONFIRM THAT THE STRUCTURAL INTEGRITY OF
THE PAVEMENT CAN BE MAINTAINED OVER THE UTILITY.
7. THE AREA OF SUBBASE COVERED BY SUBSURFACE CHECK DAMS, IMPERMEABLE LINERS,
COMPACTED ENGINEERED FILL, CONCRETE PADS AND OTHER UTILITY INFRASTRUCTURE
SHOULD BE EXCLUDED FROM HYDROLOGIC PERFORMANCE CALCULATIONS WHEN THE AREA
IS SIGNIFICANT (GREATER THAN 10 PERCENT) RELATIVE TO THE INFILTRATIVE AREA.
GENERAL COMPONENTSGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
2.2
GC
FILE NO.
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2.2
GC
2.3
GC
2.5
GC
2.6
GC
2.7
GC
2.8
GC
2.9
GC
2.10
GC
2.11
GC
2.12
GC
2.1
DESIGNER CHECKLIST (MUST SPECIFY, AS APPLICABLE):
LINER EMBEDMENT DEPTH INTO SUBGRADE SOILS
PIPE AND SLEEVE MATERIALS AND DIAMETER FOR ALL WALL PENETRATIONS
WALL PENETRATION TYPE (E.G., GROUTED, COMPRESSION, BOOT) SEE GC 2.9 - 2.11.
GEOTEXTILE FABRICS AND/OR LINER MATERIALS
ENGINEERED BACKFILL MATERIAL
DIMENSIONS OF ALL PROTECTION MEASURES
MINIMUM SETBACKS TO ADJACENT INFRASTRUCTURE, PAVEMENT BASES, SURFACES
MINIMUM PIPE COVER AS REQUIRED BY UTILITY PROVIDER
UTILITY SLEEVE NOTES AND GUIDANCE:
THE DESIGNER MUST SPECIFY THE TYPE OF SLEEVE METHOD AND MATERIALS THAT SHALL BE USED FOR ALL APPLICABLE
NEW AND EXISTING UTILITIES TO REMAIN IN PLACE WITHIN THE FOOTPRINT OF INFILTRATION FACILITIES. DEPENDING ON THE
SPECIFIC SITE CONDITIONS AND GOVERNING UTILITY STANDARDS, EXISTING UTILITIES TO REMAIN IN PLACE SHALL BE
SLEEVED THE ENTIRE LENGTH WITHIN THE INFILTRATION FACILITY USING ONE OF THE FOLLOWING METHODS OR AN
APPROVED EQUAL:
a. PLASTIC PIPE, 1 - 2 SIZES LARGER THAN UTILITY PIPE, CUT IN HALF, PLACED AROUND UTILITY PIPE, SEALED ALONG
JOINTS WITH ADHESIVE, AND CLAMPED TOGETHER WITH STAINLESS STEEL BANDS/HOSE CLAMPS. PIPE SUPPORTS
(E.G. CLOSED CELL FOAM BLOCKING) WITHIN THE SLEEVE PER UTILITY PROVIDER'S REQUIREMENTS.
b. GEORGE FISCHER "CONTAIN-IT" PIPE CONTAINMENT SYSTEM PRODUCT, PART NO. 8326-040AA OR 8326-060AA OR
EQUAL, INSTALLED PER MANUFACTURER'S RECOMMENDATIONS.
c. STAINLESS STEEL SPLIT SLEEVE PRODUCT INSTALLED AROUND THE EXISTING PIPE AND POSITIONED IN THE FORM
TO CENTER THE UTILITY PIPE. AFTER INSTALLATION, THE MANUFACTURER'S RECOMMENDED MATERIAL IS USED TO
SEAL THE ANNULAR SPACE BETWEEN THE SPLIT SLEEVE AND PIPE. USE PIPE SEAL AND INSULATOR INC., WS SPLIT
SEALWALL SLEEVE, OR EQUAL.
EXISTING UTILITY COORDINATION NOTES:
1. THE DESIGNER SHALL LOCATE ALL EXISTING UTILITIES WITHIN THE PROJECT AREA TO THE MOST PRACTICAL EXTENT
POSSIBLE UTILIZING SITE SURVEYS, AS-BUILT PLANS, SITE INVESTIGATIONS, POTHOLING, UTILITY AGENCY DATA, ETC.
AND PRESENT THIS INFORMATION AND SOURCE (I.E. AS-BUILT VS. ASSUMED LOCATION) CLEARLY ON THE DESIGN
DRAWINGS. THE ASSUMED LOCATION OF EXISTING UTILITIES SHALL BE PROVIDED IN THE SAME COORDINATE SYSTEM AS
THE REST OF THE DESIGN DRAWINGS. DESIGN DRAWINGS SHALL ALSO INCLUDE CONTACT INFORMATION FOR ANY
UTILITIES AFFECTED BY THE PROJECT.
2. IF AN EXISTING UTILITY HAS THE POTENTIAL TO IMPACT THE PROJECT DESIGN AND/OR THE PERFORMANCE OF THE GI
FACILITY, THE EXACT LOCATION, DEPTH, AND CONDITION OF THIS UTILITY SHOULD BE FIELD VERIFIED DURING THE
DESIGN PHASE (VIA POTHOLING OR OTHER APPROVED METHOD) TO PREVENT COSTLY REDESIGNS AND/OR PROJECT
DELAYS DURING CONSTRUCTION.
3. THE CONTRACTOR SHALL VERIFY THE LOCATIONS AND DEPTH OF EXISTING UTILITIES AT THE START OF CONSTRUCTION
PER THE PROJECT SPECIFICATIONS. ANY DISCREPANCIES BETWEEN THE EXISTING UTILITIES SHOWN IN THE DESIGN
DRAWINGS AND THE ACTUAL FIELD CONDITIONS SHOULD BE COMMUNICATED TO THE ENGINEER IMMEDIATELY.
4. THE CHECK DAM SPACING AND HEIGHT SPECIFIED ON THE DESIGN PLANS MUST BE MAINTAINED. IF THE CHECK DAM
PROTECTING THE EXISTING UTILITY WILL IMPACT THE CHECK DAM SPACING SPECIFIED ON THE PLANS, THE ENGINEER
MUST EVALUATE ITS IMPACT ON THE HYDROLOGIC PERFORMANCE AND APPROVE THE VARIANCE. SEE PC 2.1 AND PC 2.2
FOR FURTHER DETAILS.
A,
B
GC
2
.
5
UTILITY MAIN
CROSSING
CATCH BASIN
UTILITY SERVICE
CROSSING
BP
1.1
BIORETENTION
FACILITY, SEE
A,B,C
GC 2.4
WALL PENETRATION,
SEE GC
2.10
GC
2.11
GC
2.9
UTILITY TRENCH DAM AS
NEEDED (TYP). DESIGNER
TO SPECIFY. SEE NOTE 2
AND GC
2.12
CONSTRUCTION NOTES:
1. ABANDONED UTILITIES WITHIN FOOTPRINT OF FACILITY AND OBSERVED DURING
CONSTRUCTION MUST BE REMOVED. COORDINATE WITH MUNICIPAL OR PRIVATE
OWNER AND ENGINEER.
2. PROVIDE UTILITY TRENCH DAM OR EQUIVALENT MEASURE OUTSIDE OF THE
INFILTRATION FACILITY AT PIPE PENETRATIONS TO PREVENT PREFERENTIAL
FLOW FROM INFILTRATION FACILITY INTO UTILITY TRENCHES. COORDINATE WITH
ENGINEER.
VARIES, 5' (MIN) CURB CUT
TO EDGE OF CATCH BASIN,
SEE SMC DPW STD
B-1A AND B-2A
GENERAL COMPONENTSGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
2.3
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2.3
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2.5
GC
2.6
GC
2.7
GC
2.8
GC
2.9
GC
2.10
GC
2.11
GC
2.12
GC
2.1
EMBED LINER 3" (MIN)
INTO NATIVE SOIL (E) UTILITY SERVICE TO
REMAIN IN PLACE, SEE NOTE 1NATIVE SOIL,
SEE NOTE 2
IMPERMEABLE
LINER, SEE
WITHIN BIORETENTION FACILITY B
SHALLOW UTILITY SERVICE
(E) UTILITY SERVICE TO REMAIN
IN PLACE, SEE NOTE 1
NATIVE SOIL, SEE NOTE 2
UNDER BIORETENTION FACILITY A
SHALLOW UTILITY SERVICE
IMPERMEABLE LINER
FOR UTILITY
PROTECTION, IF
REQUIRED DUE TO
INADEQUATE
SEPARATION, SEE
UTILITY SERVICE
PIPE SLEEVE PER
UTILITY PROVIDER'S
REQUIREMENTS,
DESIGNER TO SPECIFY,
SEE NOTE 3
WITHIN BIORETENTION FACILITY C
SLEEVED UTILITY SERVICE
CONSTRUCTION NOTES:
1. CONTRACTOR SHALL LOCATE AND DETERMINE DEPTH OF EXISTING UTILITY WITHIN THE
FOOTPRINT OF THE BIORETENTION FACILITY WHILE LIMITING THE AMOUNT OF
DISTURBANCE TO THE SOIL/BACKFILL MATERIAL OVER AND AROUND THE UTILITY PIPE. IF
ELECTROMAGNETIC UTILITY LOCATING, POTHOLING, OR OTHER METHOD REVEALS THAT
THE UTILITY PIPE DOES NOT MEET THE REQUIRED CLEARANCE FROM THE BOTTOM OF
THE BIORETENTION FACILITY, THE UTILITY PROVIDER MAY REQUIRE THAT PROTECTION
MEASURES, SUCH AS THOSE SHOWN ON THIS PLAN, BE IMPLEMENTED PER THEIR
STANDARDS. ANY DISCREPANCIES BETWEEN THE EXISTING UTILITIES SHOWN IN THE
DESIGN DRAWINGS AND THE ACTUAL FIELD CONDITIONS SHOULD BE COMMUNICATED TO
THE ENGINEER IMMEDIATELY.
2. EXISTING UTILITIES AND NATIVE SOIL AROUND EXISTING UTILITIES SHOULD REMAIN IN
PLACE WHERE POSSIBLE. IF A PORTION OR ALL OF THE UTILITY IS UNCOVERED DURING
EXCAVATION OR EXISTING SOIL WITHIN 1 FOOT OF THE KNOWN EXISTING UTILITY IS
SCARIFIED, NATIVE SOIL OR APPROVED ENGINEERED BACKFILL SHALL BE CAREFULLY
PLACED AND COMPACTED AROUND THE UTILITY PER THE UTILITY PROVIDER'S
REQUIREMENTS.
3. UTILITY PROVIDER MAY ALLOW UTILITY SERVICES TO BE LEFT IN PLACE AND WRAPPED
WITH A WATERTIGHT WRAP OR TAPE IN LIEU OF A SLEEVE. THIS MUST BE APPROVED
PRIOR TO THE START OF CONSTRUCTION.
VERIFY MIN. SEPARATION TO
BOTTOM OF FACILITY, SEE NOTE 1
DESIGNER TO SPECIFY
MIN. PIPE COVER AS
REQUIRED BY UTILITY PROVIDER
DESIGNER TO SPECIFY
MIN. PIPE COVER AS
REQUIRED BY UTILITY PROVIDER
DESIGNER TO SPECIFY
MIN. PIPE COVER AS
REQUIRED BY UTILITY PROVIDER
GC
1.2
12" (MIN)
DESIGNER TO SPECIFY
MIN. CLEARANCE
AROUND UTILITY
GC
1.1
GC
1.2
GC
1.1
GENERAL COMPONENTSGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
2.4
GC
FILE NO.
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2.2
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2.3
GC
2.5
GC
2.6
GC
2.7
GC
2.8
GC
2.9
GC
2.10
GC
2.11
GC
2.12
GC
2.1
EMBED LINER 3"
INTO NATIVE SOIL (E) UTILITY MAIN TO
REMAIN IN PLACENATIVE SOIL,
SEE NOTE 2
WITHIN BIORETENTION FACILITY B
SHALLOW UTILITY MAIN
(E) UTILITY MAIN TO
REMAIN IN PLACE
TO PLANTER WALL A
UTILITY MAIN ADJACENT
DESIGNER TO SPECIFY MIN.
CLEARANCE AROUND
UTILITY, SEE NOTE 3
CONSTRUCTION NOTES:
1. ANY DISCREPANCIES BETWEEN THE EXISTING UTILITIES SHOWN IN THE DESIGN
DRAWINGS AND THE ACTUAL FIELD CONDITIONS SHOULD BE COMMUNICATED TO THE
ENGINEER IMMEDIATELY.
2. EXISTING UTILITIES AND NATIVE SOIL AROUND EXISTING UTILITIES SHOULD REMAIN IN
PLACE WHERE POSSIBLE. IF A PORTION OR ALL OF THE UTILITY IS UNCOVERED DURING
EXCAVATION OR EXISTING SOIL WITHIN 1 FOOT OF THE KNOWN EXISTING UTILITY IS
SCARIFIED, NATIVE SOIL OR APPROVED ENGINEERED BACKFILL SHALL BE CAREFULLY
PLACED AND COMPACTED AROUND THE UTILITY PER THE UTILITY PROVIDER'S
REQUIREMENTS.
3. PROVIDE THE MINIMUM CLEARANCE AROUND THE UTILITY MAIN AND SETBACKS FROM
STRUCTURAL ELEMENTS PER THE UTILITY PROVIDER'S REQUIREMENTS.
4. UTILITY MAINS SHALL NOT BE SUBJECT TO LOADING FROM NEW PLANTER WALLS. LOAD
BEARING LINES TO BE DETERMINED BY THE GEOTECHNICAL ENGINEER.
SEE NOTE 3
SEE NOTE 3
PLANTER WALL
LOAD BEARING
LINE, SEE NOTE 4
IMPERMEABLE
LINER, SEE
SEE NOTE 3
BC
1.1
EDGE TREATMENT,
SEE
LINER ATTACHMENT,
DESIGNER TO SPECIFY
EMBED LINER 3" INTO
NATIVE SUBGRADE IMPERMEABLE
LINER, SEE GC
1.2
GC
1.1
DESIGNER TO SPECIFY
MIN. PIPE COVER AS
REQUIRED BY UTILITY PROVIDER
DESIGNER TO SPECIFY
MIN. PIPE COVER AS
REQUIRED BY UTILITY PROVIDER
GC
1.2
NATIVE SOIL,
SEE NOTE 2
GC
1.1
GENERAL COMPONENTSGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
2.5
GC
FILE NO.
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2.2
GC
2.3
GC
2.5
GC
2.6
GC
2.7
GC
2.8
GC
2.9
GC
2.10
GC
2.11
GC
2.12
GC
2.1
A,
B
GC
2
.
8
A,B.C
GC 2.7
UTILITY MAIN
CROSSINGUTILITY SERVICE
CROSSING
PP
1.1
PERVIOUS
PAVEMENT,SEE
ROADWAY
EDGE TREATMENT, SEE PP
1.3
ROADWAY
PP
1.3
EDGE TREATMENT, SEE
SIDEWALKSIDEWALK
WALL PENETRATION,
SEE GC
2.10
GC
2.11
GC
2.9
CONSTRUCTION NOTES:
1. ABANDONED UTILITIES WITHIN FOOTPRINT OF FACILITY AND OBSERVED DURING
CONSTRUCTION MUST BE REMOVED. COORDINATE WITH MUNICIPAL OR PRIVATE
OWNER AND ENGINEER.
2. PROVIDE UTILITY TRENCH DAM OR EQUIVALENT MEASURE OUTSIDE OF THE
INFILTRATION FACILITY AT PIPE PENETRATIONS TO PREVENT PREFERENTIAL
FLOW FROM INFILTRATION FACILITY INTO UTILITY TRENCHES. COORDINATE WITH
ENGINEER.
OPTIONAL UTILITY TRENCH
DAM AS NEEDED (TYP) .
DESIGNER TO SPECIFY.
SEE GC
2.12
GENERAL COMPONENTSGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
2.6
GC
FILE NO.
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2.2
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2.3
GC
2.5
GC
2.6
GC
2.7
GC
2.8
GC
2.9
GC
2.10
GC
2.11
GC
2.12
GC
2.1
WITHIN SUBSURFACE CHECK DAM B
SHALLOW UTILITY SERVICEUNDER PERVIOUS PAVEMENT A
SHALLOW UTILITY SERVICE
CONSTRUCTION NOTES:
1. CONTRACTOR SHALL LOCATE AND DETERMINE DEPTH OF EXISTING UTILITY WITHIN THE
FOOTPRINT OF THE PERVIOUS PAVEMENT FACILITY WHILE LIMITING THE AMOUNT OF DISTURBANCE
TO THE SOIL/BACKFILL MATERIAL OVER AND AROUND THE UTILITY PIPE. IF ELECTROMAGNETIC
UTILITY LOCATING, POTHOLING, OR OTHER METHOD REVEALS THAT THE UTILITY PIPE DOES NOT
MEET THE REQUIRED SETBACK FROM THE BOTTOM OF THE PERVIOUS PAVEMENT SECTION, THE
UTILITY PROVIDER MAY REQUIRE THAT PROTECTION MEASURES, SUCH AS THOSE SHOWN ON THIS
PLAN, BE IMPLEMENTED.
2. EXISTING UTILITIES AND NATIVE SOIL AROUND EXISTING UTILITIES SHOULD REMAIN IN PLACE
WHERE POSSIBLE. IF A PORTION OR ALL OF THE UTILITY IS UNCOVERED DURING EXCAVATION OR
EXISTING SOIL WITHIN 1 FOOT OF THE KNOWN EXISTING UTILITY IS SCARIFIED, NATIVE SOIL OR
APPROVED ENGINEERED BACKFILL SHALL BE CAREFULLY PLACED AND COMPACTED AROUND THE
UTILITY PER THE UTILITY PROVIDER'S REQUIREMENTS.
3. THE CHECK DAM SPACING AND HEIGHT SPECIFIED ON THE DESIGN PLANS MUST BE MAINTAINED. IF
THE CHECK DAM PROTECTING THE EXISTING UTILITY WILL IMPACT THE CHECK DAM SPACING
SPECIFIED ON THE PLANS, COORDINATE WITH ENGINEER.
4. UTILITY PROVIDER MAY ALLOW SHALLOW UTILITY SERVICES TO BE LEFT IN PLACE AND WRAPPED
WITH A WATERTIGHT WRAP OR TAPE IN LIEU OF A SLEEVE. THIS SHOULD BE APPROVED PRIOR TO
THE START OF CONSTRUCTION.
*SEE NOTE 3 REGARDING
SUBSURFACE CHECK DAM
SPACING
WITHIN PERVIOUS PAVEMENT C
SLEEVED UTILITY SERVICE
.VERIFY MIN. SEPARATION
TO BOTTOM OF PAVEMENT
SECTION, SEE NOTE 1
GC
1.2
IMPERMEABLE
LINER, SEE
NATIVE SOIL,
SEE NOTE 2
EMBED LINER 3" (MIN)
INTO NATIVE SOIL
(E) UTILITY SERVICE TO REMAIN
NATIVE SOIL, SEE NOTE 2
UTILITY PROTECTION,
IF REQUIRED DUE TO
INADEQUATE
SEPARATION, SEE
NOTE 1
PIPE SLEEVE PER
UTILITY PROVIDER'S
REQUIREMENTS,
DESIGNER TO
SPECIFY, SEE NOTE 4
(E) UTILITY SERVICE
TO REMAIN IN PLACE
UTILITY SERVICE
ENCROACHMENT INTO
STRUCTURAL PAVEMENT
BASE MUST BE APPROVED
BY ENGINEER
DESIGNER TO SPECIFY
MIN. PIPE COVER AS
REQUIRED BY UTILITY PROVIDER
2" (MIN) CLEARANCE, DESIGNER TO SPECIFY
DESIGNER TO SPECIFY MIN.
CLEARANCE AROUND UTILITY SERVICE
DESIGNER TO SPECIFY
MIN. PIPE COVER AS
REQUIRED BY UTILITY PROVIDER
PROVIDE MIN. PIPE COVER AS
REQUIRED BY UTILITY PROVIDER
CONTROL JOINT (TYP), (PERVIOUS
CONCRETE ONLY), DESIGNER TO SPECIFY
GC
1.1
SEE PERVIOUS
PAVEMENT SECTION SEE PERVIOUS
PAVEMENT SECTION
SEE PERVIOUS
PAVEMENT SECTION
GENERAL COMPONENTSGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
2.7
GC
FILE NO.
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GC
2.2
GC
2.3
GC
2.5
GC
2.6
GC
2.7
GC
2.8
GC
2.9
GC
2.10
GC
2.11
GC
2.12
GC
2.1
PAVEMENT AND ADJACENT TO EDGE RESTRAINT A
UTILITY MAIN WITHIN PERVIOUS
NATIVE SOIL,
SEE NOTE 1
IMPERMEABLE
PAVEMENT
(E) UTILITY MAIN TO
REMAIN IN PLACE
SEE NOTE 2
CONCRETE BAND
LOAD BEARING
LINE, SEE NOTE 3
IMPERMEABLE
LINER, SEE
SEE NOTE 2
PERVIOUS PAVEMENT B
UTILITY MAIN WITHIN
EMBED LINER 3" (MIN)
INTO NATIVE SOIL
NATIVE SOIL,
SEE NOTE 1
(E) UTILITY MAIN TO
REMAIN IN PLACE
CONSTRUCTION NOTES:
1. EXISTING UTILITIES AND NATIVE SOIL AROUND EXISTING UTILITIES SHOULD
REMAIN IN PLACE WHERE POSSIBLE. IF A PORTION OR ALL OF THE UTILITY IS
UNCOVERED DURING EXCAVATION OR EXISTING SOIL WITHIN 1 FOOT OF THE
KNOWN EXISTING UTILITY IS SCARIFIED, NATIVE SOIL OR APPROVED
ENGINEERED BACKFILL SHALL BE CAREFULLY PLACED AND COMPACTED
AROUND THE UTILITY PER THE UTILITY PROVIDER'S REQUIREMENTS.
2. PROVIDE THE MINIMUM CLEARANCE AROUND THE UTILITY MAIN AND SETBACKS
FROM STRUCTURAL ELEMENTS PER THE UTILITY PROVIDER'S REQUIREMENTS.
3. UTILITY MAINS SHALL NOT BE SUBJECT TO LOADING FROM NEW CURBS/WALLS.
LOAD BEARING LINES TO BE DETERMINED BY THE GEOTECHNICAL ENGINEER.
EDGE TREATMENT, SEE PP
1.3
EMBED LINER 3" (MIN)
INTO NATIVE SOIL
LINER ATTACHMENT,
DESIGNER TO SPECIFY
DESIGNER TO
SPECIFY MIN.
CLEARANCE
AROUND UTILITY,
SEE NOTE 2
DESIGNER TO SPECIFY PIPE COVER
AS REQUIRED BY UTILITY PROVIDER
GC
1.2
IMPERMEABLE
LINER, SEE
GC
1.2
DESIGNER TO SPECIFY
MIN. PIPE COVER AS
REQUIRED BY UTILITY
PROVIDER
SEE PERVIOUS
PAVEMENT SECTION
SEE PERVIOUS
PAVEMENT SECTION
GC
1.1
GC
1.1
GENERAL COMPONENTSGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
2.8
GC
FILE NO.
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2.2
GC
2.3
GC
2.5
GC
2.6
GC
2.7
GC
2.8
GC
2.9
GC
2.10
GC
2.11
GC
2.12
GC
2.1
PENETRATION DIA
VARIES, SEE NOTE 1
1" GRANULAR
BENTONITE FILLET,
SEE NOTE 2
30 MIL HDPE LINER, OR EQUAL
HDPE BOOT OR EQUAL,
SEE NOTES 5, 6, & 9
1/2" STAINLESS STEEL CLAMP
HDPE BOOT OR
EQUAL, SEE
NOTES 5, 6, & 9
1/2" STAINLESS
STEEL CLAMP
30 MIL HDPE LINER, OR EQUAL
1" GRANULAR BENTONITE
FILLET, SEE NOTE 2
TYPICAL LINER PENETRATION - PERPENDICULAR 1 TYPICAL LINER PENETRATION - ANGLED 2
ANGLE VARIES,
SEE NOTE 7
HDPE BOOT OR EQUAL;
EXTEND 3" (MIN) BEYOND
NEOPRENE PAD
NEOPRENE RUBBER
PAD, SEE NOTE 3
2" (MIN)
1/2" STAINLESS
STEEL HOSE CLAMPS
OPTIONAL HEAT SHRINK
WRAP, SEE NOTE 8
BUTYL MASTIC CAULK, SEE NOTE 3
PIPE
CONSTRUCTION NOTES:
1. CUT OPENING IN LINER FOR PIPE TO WITHIN 1/2" OF PIPE OUTSIDE DIAMETER.
2. FILL ANNULAR SPACE WITH 1" MINIMUM GRANULAR BENTONITE FILLET AS SHOWN.
3. APPLY BUTYL MASTIC CAULK AND NEOPRENE RUBBER PAD CONTINUOUSLY AROUND PIPE.
4. PROVIDE CONTINUOUS EXTRUSION WELD AT PIPE BOOT/LINER INTERFACE.
5. FORM BOOT WITH SUFFICIENT MATERIAL TO PREVENT OVERSTRESSING DURING
BACKFILLING, BUT WITHOUT FOLDS OR WRINKLES.
6. CONSTRUCT BOOT FROM SAME MATERIAL AS THE LINER.
7. ANGLE SHOULD NOT BE LESS THAN 30°. IF ANGLE IS LESS THAN 30° ADD SOIL AROUND THE
PIPE TO INCREASE THE ANGLE AND PREVENT STRESSING AND CRACKING.
8. SEAL CLAMP AND END OF BOOT WITH HEAT SHRINK WRAP. EXTEND HEAT SHRINK WRAP
ONE PIPE DIAMETER (MINIMUM) BEYOND CLAMP.
9. CONTRACTOR MAY USE PREFABRICATED PIPE BOOTS IN LIEU OF FIELD-FABRICATED
BOOTS. CONNECT PREFABRICATED BOOT TO LINER AND PIPE PER MANUFACTURER'S
RECOMMENDATIONS.
PENETRATION
DIA VARIES,
SEE NOTE 1
EXTRUSION WELD HDPE BOOT
TO LINER, SEE NOTE 4
6" (MIN), ALL SIDES
EXTRUSION WELD HDPE BOOT
TO LINER, SEE NOTE 4
6" (MIN)
12"
(MIN)
SEE ENLARGEMENT 1
SEE ENLARGEMENT 1
ENLARGEMENT 1
GENERAL COMPONENTSGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
2.9
GC
FILE NO.
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2.3
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2.5
GC
2.6
GC
2.7
GC
2.8
GC
2.9
GC
2.10
GC
2.11
GC
2.12
GC
2.1
PENETRATION DIAMETER
PER SEAL MANUFACTURER'S
RECOMMENDATIONS
CONCRETE WALLEPDM MODULAR
SEAL OR EQUAL
CORE OR CAST HOLE PER SEAL
MANUFACTURER'S RECOMMENDATIONS
TYPICAL WATERTIGHT WALL PENETRATION - ALTERNATE 2 2
SMOOTH-WALLED PIPE
CONCRETE WALL
NON-SHRINK GROUT OR
CAST-IN-PLACE CONCRETE
SMOOTH WALLED PIPE
TYPICAL SOIL TIGHT WALL PENETRATION 3
CONCRETE WALL
NON-SHRINK GROUT OR
CAST-IN-PLACE CONCRETE
LCT GASKET OR EQUAL FOR SMOOTH-WALLED
PIPE. FOR CORRUGATED PIPE, USE GASKET TO
FILL CORRUGATION AND PROTRUDE INTO
GROUT OR CAST-IN-PLACE CONCRETE PER
MANUFACTURER'S RECOMMENDATIONS
TYPICAL WATERTIGHT WALL PENETRATION - ALTERNATE 1 1
SMOOTH-WALLED PIPE
GENERAL COMPONENTSGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
2.10
GC
FILE NO.
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2.4
GC
2.2
GC
2.3
GC
2.5
GC
2.6
GC
2.7
GC
2.8
GC
2.9
GC
2.10
GC
2.11
GC
2.12
GC
2.1
RUBBER JOINT FILLER, ASTM
D1056 GRADE 1, 2, OR 3 (TYP)
WATER SERVICE
LATERAL, SEE NOTE 1
CONCRETE PLANTER WALL
PIPE SLEEVE PER SMC DPW
REQUIREMENTS, SEE NOTE 5
SEWER LATERAL,
SEE NOTE 1
EXTEND SLEEVE
BEYOND WALL
IF REQUIRED, SEE NOTE 3
CONCRETE PLUG PER
SMC DPW REQUIREMENTS
FOR SEWER LATERALS 2
WALL PENETRATIONFOR WATER LATERALS 1
WALL PENETRATION
CONCRETE PLANTER WALL
PIPE SLEEVE PER SMC DPW
REQUIREMENTS, SEE NOTE 5
CASING SPACERS
OR APPROVED
EQUAL TO SUPPORT
CARRIER PIPE, SEE
NOTE 5
CONSTRUCTION NOTES:
1. IN CASES WHERE SHALLOW EXISTING UTILITIES, SUCH AS STREET LIGHT CONDUIT, HAVE BEEN APPROVED TO REMAIN IN PLACE PER
THE UTILITY PROVIDER, AND SLEEVING FROM ONE END IS NOT FEASIBLE, THE EXISTING UTILITIES SHALL BE CAREFULLY WRAPPED
WITH AN INSULATION MATERIAL (MIN. 1" THICK) AND A WATERTIGHT TAPE UNTIL THE WALLS ARE FORMED AROUND THE PIPE
CROSSINGS. ONCE THE WALLS ARE SET, THE INSULATION WRAP SHALL BE REMOVED AND THE WALL PENETRATIONS SEALED.
2. DETECTABLE UTILITY MARKING TAPE SHALL BE PLACED OVER ALL UTILITIES WITHIN THE FOOTPRINT OF BIORETENTION FACILITIES.
REFER TO THE TAPE MANUFACTURER'S RECOMMENDATIONS FOR MAXIMUM TAPE BURIAL DEPTH.
3. IF SEWER LATERAL IS BELOW BOTTOM OF BIORETENTION FACILITY AND WALL PENETRATION IS NOT NECESSARY, SMC DPW MAY
REQUIRE THE SLEEVE AROUND NEW LATERAL PIPE TO BE EXTENDED BEYOND THE OUTSIDE OF THE PLANTER ON THE SIDEWALK SIDE.
SEE DESIGN DRAWINGS FOR FURTHER DIRECTION.
4. ALL OTHER REPLACED OR NEW UTILITY SERVICES, SUCH AS GAS, TELECOM, ELECTRICAL, AND IRRIGATION RUNNING THROUGH A
BIORETENTION FACILITY SHALL BE SLEEVED AND WALL PENETRATIONS SHALL BE DESIGNED TO MEET UTILITY PROVIDER'S
REQUIREMENTS.
5. PIPE SLEEVE DESIGN AND MATERIALS, CONFORMING TO SMC DPW STANDARDS, SHALL BE SPECIFIED ON THE DESIGN DRAWINGS.
GENERAL COMPONENTSGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
2.11
GC
FILE NO.
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GC
2.2
GC
2.3
GC
2.5
GC
2.6
GC
2.7
GC
2.8
GC
2.9
GC
2.10
GC
2.11
GC
2.12
GC
2.1
CONSTRUCTION NOTES:
1. REFER TO DESIGN PLANS FOR TRENCH DAM LOCATIONS.
2. CONTROLLED DENSITY FILL SHALL BE 100 - 150 PSI STRENGTH
WITH A WATER CONDUCTIVITY OF 1.0 X 10-6 CM/SEC (MAX).
3. TRENCH DAM SHALL EXTEND BEYOND THE EXISTING UTILITY
TRENCH INTO THE NATIVE SOIL PER THE MINIMUM DIMENSIONS
SHOWN. THE TRENCH DAM SHALL HAVE A MINIMUM THICKNESS
OF 1' (MEASURED PARALLEL TO THE UTILITY PIPE LENGTH).
EDGE OF TYPICAL UTILITY
TRENCH EXCAVATION
WATERTIGHT
CONTROLLED DENSITY
FILL AROUND PIPE,
SEE NOTE 2
1' (MIN) BELOW
TRENCH BOTTOM
TYPICAL TRENCH WIDTH
PER UTILITY AGENCY REQUIREMENTS
UTILITY PIPE
UTILITY TRENCH DAM 1
TOP OF TRENCH
DAM, SEE NOTE 1
1' (MIN)
SEE NOTE 3
1' (MIN)
SEE NOTE 3
1.5' (MIN) ABOVE
TOP OF PIPE
EDGE OF EXCAVATION
FOR TRENCH DAM
GENERAL COMPONENTSGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
2.12
GC
FILE NO.
GC
2.4
GC
2.2
GC
2.3
GC
2.5
GC
2.6
GC
2.7
GC
2.8
GC
2.9
GC
2.10
GC
2.11
GC
2.12
GC
2.1
GENERAL COMPONENTSGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
3.1
GC
FILE NO.
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PURPOSE:
WHEN SITING GREEN INFRASTRUCTURE (GI) FACILITIES, THE DESIGNER SHOULD LOCATE AND ASSESS
ALL KNOWN UTILITY CROSSINGS AND CONFLICTS AND ADJUST THE DESIGN TO AVOID AS MANY
EXISTING UTILITIES, LIGHTS, POLES, SIGNS AND OTHER INFRASTRUCTURE AS POSSIBLE. THE
CRITICALITY OF INFRASTRUCTURE CONFLICTS IN TERMS OF THEIR POTENTIAL IMPACT TO THE GI
PROJECT'S DESIGN PERFORMANCE, COST, AND SCHEDULE SHOULD BE CAREFULLY EVALUATED
DURING THE PLANNING PHASE.
THE PURPOSE OF THE FOLLOWING TYPICAL UTILITY CONFLICT DETAILS IS TO ALERT THE DESIGNERS
TO COMMON UTILITY CONFLICTS THAT OCCUR ON GI PROJECTS WITHIN THE PUBLIC RIGHT-OF-WAY
AND PROVIDE GENERAL GUIDANCE ON THE PROTECTION AND/OR RELOCATION OF THESE UTILITIES IN
RELATION TO THE GI FACILITY. THEY ARE PROVIDED AS TYPICAL APPLICATIONS AND DO NOT
REPRESENT APPROVED COUNTY UTILITY STANDARDS AND SPECIFICATIONS.
DESIGNER NOTES AND GUIDELINES:
1. THE DESIGNER MUST ADAPT DRAWINGS TO ADDRESS SITE-SPECIFIC CONDITIONS AND UTILITY
REQUIREMENTS AND OBTAIN APPROVAL FROM ALL RELEVANT UTILITY PROVIDERS PRIOR TO
CONSTRUCTION. COORDINATION AND APPROVAL FROM THE FOLLOWING UTILITY PROVIDERS MAY
BE NECESSARY, BUT NOT EXCLUSIVELY:
x CALIFORNIA WATER SERVICE OR SMC PUBLIC WORKS FOR DOMESTIC/FIRE WATER
x SMC PUBLIC WORKS FOR SANITARY/STORM SEWER, STREET LIGHTS
x PG&E FOR ELECTRIC/GAS/UTILITY POLES
2. MINIMUM UTILITY SETBACKS AND PROTECTION MEASURES MUST CONFORM TO CURRENT
JURISDICTIONAL ASSET PROTECTION STANDARDS. IN THE ABSENCE OF THESE STANDARDS, THE
DESIGNER SHALL REFER TO CHAPTER 3 OF SMCWPPP GI DESIGN GUIDE FOR BEST PRACTICES
AND COORDINATE DIRECTLY WITH RELEVANT UTILITY PROVIDERS FOR REQUIREMENTS.
3. THE AREA OF SUBBASE COVERED BY THE INFRASTRUCTURE FOOTINGS, COMPACTED
ENGINEERED FILL, CONCRETE PADS AND OTHER UTILITY INFRASTRUCTURE SHOULD BE
EXCLUDED FROM HYDROLOGIC PERFORMANCE CALCULATIONS WHEN THE AREA IS SIGNIFICANT
(GREATER THAN 10 PERCENT) RELATIVE TO THE INFILTRATIVE AREA.
4. DESIGNER TO SPECIFY CONCRETE FOOTING DIMENSIONS AND REINFORCEMENT FOR ALL
VERTICAL INFRASTRUCTURE.
5. SEE SMC DPW STANDARDS FOR REQUIRED SETBACKS FROM CURBS, GUARD POSTS
REQUIREMENTS, AND FOOTING DESIGN STANDARDS.
6. ALL STREET SIGN PLACEMENTS SHALL BE APPROVED BY SMC DPW PRIOR TO INSTALLATION.
7. ALL PARKING METER INSTALLATIONS OR RELOCATION DESIGNS SHALL CONFORM TO SMC DPW
STANDARDS.
DESIGNER CHECKLIST (MUST SPECIFY, AS APPLICABLE):
STREET LIGHT, SIGN, AND UTILITY POLE FOUNDATION DIMENSIONS, REINFORCEMENT,
AND SPECIFICATIONS
GEOTEXTILE FABRICS AND/OR LINER MATERIALS
ENGINEERED BACKFILL MATERIAL
DIMENSIONS OF ALL PROTECTION MEASURES
MINIMUM SETBACKS TO ADJACENT INFRASTRUCTURE, PAVEMENT BASES, SURFACES
GC
3.1
GC
3.2
GC
3.3
A
UTILITY POLE AT PLANTER 1
LIGHT POLE,
PER DPW
STANDARDS
CONCRETE FOOTING,
DESIGNER TO SPECIFY
ROADWAY
BIORETENTION
PLANTER (TYP)
LIGHT POLE PER
DPW STANDARDS
SCARIFIED AND UNCOMPACTED
SUBGRADE FOR INFILTRATING
FACILITIES, SEE NOTE 1
SET AT OR ABOVE
DESIGN PONDING
ELEVATION
EXPANSION JOINT
EXPANSION
JOINT (TYP)
BC
1.1
EDGE TREATMENT,
SEE
CONSTRUCTION NOTES:
1. AVOID COMPACTION OF EXISTING SUBGRADE BELOW
INFILTRATION FACILITIES DURING CONSTRUCTION.
2. DESIGNER TO SPECIFY FOUNDATION DETAILS. STREET
LIGHT FOUNDATION SHALL COMPLY WITH SMC DPW
STD. DWGS. E-1 AND SPECIFICATIONS.
SETBACK PER
DPW STANDARDS
BC
1.1
EDGE TREATMENT,
SEE
ROADWAY
CONCRETE FOOTING,
SEE NOTE 2
PLAN
SECTION A
COMPACTED BASE,
DESIGNER TO SPECIFY
GENERAL COMPONENTSGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
3.2
GC
FILE NO.
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3.1
GC
3.2
GC
3.3
A
PARKING METER AT PERVIOUS PAVEMENT 1
SCARIFIED AND LIGHTLY COMPACTED
SUBGRADE FOR INFILTRATING
FACILITIES, SEE NOTE 4
INSTALL METER POST AFTER
PERVIOUS CONCRETE/POROUS
ASPHALT INSTALLATION, SEE NOTE 1
CONCRETE FOUNDATION AND POST
INSTALLATION PER SMC
REQUIREMENTS, DESIGNER TO
SPECIFY
METER POST PER
SMC STANDARDS
PERMEABLE
PAVERS (TYP).
PERVIOUS CONCRETE/
POROUS ASPHALT
ROADWAYPARKING METER POST
PER SMC STANDARDS
SETBACK PER SMC REQUIREMENTS
PERMEABLE
PAVERS
PERVIOUS CONCRETE /
POROUS ASPHALT
CUT PAVERS TO
CONFORM TO BASE OF
POLE PER DPW
REQUIREMENTS
FLUSH EDGE
RECESS TOP OF BASE TO ALLOW
FOR PAVERS AND LEVELING COURSE
OR MORTAR BED TO BE PLACED ON
TOP, SEE NOTES 2 AND 3
CURB
CONSTRUCTION NOTES:
1. DUE TO THE ADDED COMPLEXITY OF INSTALLING PERVIOUS
CONCRETE AND POROUS ASPHALT AROUND NUMEROUS
POLES/POSTS, IT IS RECOMMENDED POST HOLES BE
DRILLED OUT AFTER THE PERVIOUS CONCRETE/POROUS
ASPHALT HAS CURED. IF POLES ARE INSTALLED PRIOR TO
THE PLACEMENT OF PERVIOUS CONCRETE/POROUS
ASPHALT, THE CONTRACTOR SHALL COORDINATE WITH THE
DESIGNER ON HOW THE PERVIOUS CONCRETE/POROUS
ASPHALT SHALL BE INSTALLED AROUND AND/OR OVER THE
POLE BASES.
2. WHERE METER POLES ARE SHOWN WITHIN A PERMEABLE
PAVER AREA, THE BASES OF THE POLES SHALL BE
INSTALLED BEFORE THE PAVER INSTALLATION. THE
DESIGNER MAY SPECIFY THAT THE TOP OF THE BASES BE
SET (OR CUT DOWN) AT A DEPTH THAT ALLOWS THE PAVERS
AND LEVELING COURSE TO COVER THE TOP OF THE BASE
AND REMAIN FLUSH WITH THE SURROUNDING PAVEMENT.
3. INSTALL PERVIOUS PAVEMENT OVER TOP OF FOOTING PER
PROJECT SPECIFICATIONS AND MANUFACTURER'S
RECOMMENDATIONS.
4. AVOID OVER-COMPACTION OF EXISTING SUBGRADE BELOW
PERVIOUS PAVEMENT DURING CONSTRUCTION.
PLAN
SECTION A
GENERAL COMPONENTSGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
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TYPICAL DETAILS
REVISED
VERSION
DATE
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PURPOSE:
OBSERVATION PORTS ALLOW FOR MEASUREMENT OF DRAWDOWN THROUGH A FACILITY (WHEN WATER
LEVEL MEASUREMENTS ARE NOT OBSERVABLE AT THE SURFACE). THESE PORTS CAN ALSO BE USED FOR
LONG-TERM MONITORING WITH A PRESSURE TRANSDUCER. FOR SYSTEMS INCLUDING UNDERDRAINS,
CLEANOUTS MAY SERVE AS THE FACILITY OBSERVATION PORT PROVIDED LONG-TERM MONITORING IS NOT
REQUIRED FOR THE FACILITY.
DESIGNER NOTES & GUIDELINES:
1. THE DESIGNER MUST ADAPT DRAWINGS TO ADDRESS SITE-SPECIFIC CONDITIONS.
2. OBSERVATION PORTS WITHIN A BIORETENTION FACILITY ARE NOT REQUIRED TO INCLUDE A SEPARATE
LOCKING COVER ASSEMBLY. HOWEVER, DESIGNERS SHOULD CONSIDER REQUIRING A LOCKING
OBSERVATION PORT CAP OR PLUG IF THE RISK OF TAMPERING IS CONSIDERED TO BE HIGH.
3. WHENEVER FEASIBLE, OBSERVATION PORTS SHOULD BE LOCATED OUTSIDE OF THE TRAVELED WAY. IF
SITE CONSTRAINTS NECESSITATE INSTALLATION OF OBSERVATION PORTS IN AN AREA SUBJECT TO
VEHICULAR TRAFFIC OR OTHER LOADING, OBSERVATION PORT COVER ASSEMBLIES AND MANHOLES
MUST BE DESIGNED TO WITHSTAND ANTICIPATED LOADING (E.G., H-20).
4. OBSERVATION PORTS SHOULD INCLUDE A 12 INCH WATERTIGHT SUMP TO ACCOMMODATE
CONTINUOUS WATER LEVEL MEASUREMENT WITH A PRESSURE TRANSDUCER.
DESIGNER CHECKLIST (MUST SPECIFY, AS APPLICABLE):
OBSERVATION PORT MATERIAL, DIAMETER, AND DEPTH
OBSERVATION PORT COVER ASSEMBLY/MANHOLE TYPE AND SIZE (IF APPLICABLE)
CONTROL ELEVATIONS FOR OBSERVATION PORT RIMS
TYPE OF MONITORING EQUIPMENT TO BE INSTALLED (IF APPLICABLE)
PIPE SLOT DETAIL 3
HDPE OBSERVATION PORT 1 PVC WELL CASING/SCREEN OBSERVATION PORT 2
120° (TYP)
CONSTRUCTION NOTES:
1. ALL MATERIAL AND WORKMANSHIP FOR OBSERVATION PORTS SHALL CONFORM TO SMC DPW
STANDARD SPECIFICATIONS AND APPLICABLE CODES.
2. PROVIDE 3 INCH MINIMUM COVER FROM BOTTOM OF BIOTREATMENT SOIL MEDIA TO
BEGINNING OF OBSERVATION PORT PERFORATIONS.
3. ALL PERFORATIONS SHALL BE SLOTTED TYPE, MEASURING 0.032 INCH WIDE (MAX), SPACED
AT 0.25 INCH (MIN), AND PROVIDING A MINIMUM INLET AREA OF 5.0 SQUARE INCH PER LINEAR
FOOT OF PIPE FOR PIPES 4 INCH IN DIAMETER AND LARGER AND 2.0 SQUARE INCHES PER
LINEAR FOOT OF PIPE FOR PIPES SMALLER THAN 4 INCHES IN DIAMETER.
4. PERFORATIONS SHALL BE ORIENTED PERPENDICULAR TO LONG AXIS OF PIPE, AND EVENLY
SPACED AROUND CIRCUMFERENCE AND LENGTH OF PIPE.
5. ALL FITTINGS SHALL BE SOIL TIGHT, UNLESS NOTED OTHERWISE.
12" SUMP
SOIL TIGHT FITTING
OR COUPLER (TYP)
EXTEND OBSERVATION PORT
2" (MIN) ABOVE DESIGN
PONDING ELEVATIONDESIGN PONDING
ELEVATION
REMOVABLE END
PLUG OR CAP
12" SUMP
SOIL TIGHT THREADED
JOINT OR SOLVENT
WELDED COUPLING (TYP)
EXTEND OBSERVATION PORT
2" (MIN) ABOVE DESIGN
PONDING ELEVATIONDESIGN PONDING
ELEVATION
REMOVABLE END
PLUG OR CAP
2" PVC WELL SCREEN
PIPE, ASTM D1785 SCH
40, OR EQUAL (TYP)
3" (MIN), SEE NOTE 1
STREAMBED COBBLES
8" (MIN)
3" (MIN), SEE NOTE 2
8" (MIN)
WATERTIGHT THREADED
OR SOLVENT WELDED
CAP OR PLUG
2" PVC WELL SCREEN PIPE,
ASTM D1785 SCH 40, OR
EQUAL, SLOTTED, SEE
4" (MIN) SLOTTED HDPE
SDR 17 OR WELL
SCREEN PIPE, OR
EQUAL, SEE
WATERTIGHT
CAP OR PLUG
3
-
UNDERDRAIN PIPE,
WHERE PRESENT
UNDERDRAIN PIPE,
WHERE PRESENT
4" (MIN) HDPE SDR 17 OR WELL
SCREEN PIPE, OR EQUAL (TYP)
STREAMBED COBBLES
2" (MIN) CLEARANCE,
ALL AROUND
2" (MIN) CLEARANCE,
ALL AROUND
CENTERLINE OF
PERFORATION
LOCATION (TYP)
SLOTTED HDPE SDR 17
OR WELL SCREEN PIPE
PERFORATION SLOTS (TYP),
SEE NOTES 3 AND 4
3
-
GENERAL COMPONENTSGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
4.2
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4.1
PVC WELL SCREEN OBSERVATION PORT 1
12" SUMPTHREADED JOINT OR SOLVENT
WELDED COUPLING (TYP)
8" (MIN)
SEE PERVIOUS
PAVEMENT
SECTION
TRAFFIC RATED VALVE BOX AND
COVER, WELL MANHOLE COVER,
OR EQUAL, SEE NOTES 2 AND 3
REMOVABLE END
PLUG OR CAP
WATERTIGHT THREADED OR
SOLVENT WELDED CAP OR PLUG
2' x 2' x 1' THICK
CONCRETE COLLAR
2" (MIN) CLEARANCE
ALL AROUND
2" PVC WELL SCREEN
PIPE, ASTM D1785 SCH
40, OR EQUAL
GC
4.2
2" SLOTTED PVC WELL SCREEN
PIPE, ASTM D1785 SCH 40, OR
EQUAL, SEE DETAIL 3
4" (MIN)
CONSTRUCTION NOTES:
1. ALL MATERIAL AND WORKMANSHIP FOR OBSERVATION PORTS SHALL CONFORM TO SMC
DPW STANDARD SPECIFICATIONS AND APPLICABLE CODES.
2. COVER SHALL BE TRAFFIC RATED WITH TAMPER RESISTANT LOCKING MECHANISM. COVER
SHALL INCLUDE CASTING OF STANDARD TRIANGLE SYMBOL, "TEST WELL", "MONITORING
WELL", OR EQUAL.
3. OBSERVATION PORT COVERS AND LIDS MUST COMPLY WITH SMC STANDARD ACCESSIBILITY
REQUIREMENTS.
4. WELL SCREEN SLOTS SHALL BE 0.032 INCHES WIDE (MAX), SPACED AT 0.25 INCH (MIN), AND
PROVIDE A MINIMUM INLET AREA OF 2.0 SQUARE INCH PER LINEAR FOOT OF PIPE.
5. ALL FITTINGS SHALL BE SOIL TIGHT, UNLESS NOTED OTHERWISE.
GENERAL COMPONENTSGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
4.3
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4.1
TRAFFIC RATED LOCKING CAST IRON LID
PER CLEAN OUT BOX COVER OR VALVE
BOX PER MANUFACTURER
RECOMMENDATIONS, SEE NOTES 3 AND 4
TRAFFIC RATED CAST IRON
CLEAN OUT BOX COVER, CAST
IRON VALVE BOX, OR EQUAL
END PLUG OR CAP PER PIPE
MANUFACTURER'S RECOMMENDATION
ADD VALVE BOX EXTENSION OR
SOIL PIPE AS NECESSARY TO
ACCOMMODATE O.D. OF HDPE PIPE
SOIL TIGHT 45°
BENDS
CONSTRUCTION NOTES:
1. ALL MATERIAL AND WORKMANSHIP FOR CLEANOUTS SHALL CONFORM TO
SMC DPW STANDARD SPECIFICATIONS AND APPLICABLE CODES.
2. CLEANOUT PIPE AND FITTINGS SHALL BE SAME SIZE AND MATERIAL AS
SLOTTED UNDERDRAIN PIPE.
3. COVER SHALL BE TRAFFIC RATED WITH TAMPER RESISTANT LOCKING
MECHANISM. COVER SHALL INCLUDE CASTING OF "CO" OR EQUAL.
4. CLEANOUT COVERS AND LIDS MUST COMPLY WITH SMC STANDARD
ACCESSIBILITY REQUIREMENTS.
5. CLEANOUT SHALL BE INSTALLED TO ALLOW FOR MAINTENANCE ACCESS TO
ALL PIPES.
6. ALL FITTINGS SHALL BE SOIL TIGHT.
6" ROUND VALVE BOX
WITH LOCKING
COVER, SEE NOTE 4
GRAVEL BASE
ASTM NO. 57
6" (MIN)
HDPE SDR 17 PIPE OR EQUAL,
SEE NOTE 2
CLEANOUT - ALTERNATIVE 2 2
CLEANOUT - ALTERNATIVE 3 (PARCEL ONLY)3
4" (MIN)
CLEANOUT - ALTERNATIVE 1 1
UNDERDRAIN PIPE,
SEE
SOIL TIGHT
COUPLER
WALL PENETRATION,
SEE GC
2.11
GC
2.10
END PLUG OR CAP PER
PIPE MANUFACTURER'S
RECOMMENDATION
SOIL TIGHT 45°
BENDS
BC
5.2
HDPE SDR 17 PIPE OR
EQUAL, SEE NOTE 2
UNDERDRAIN PIPE, SEE
SOIL TIGHT
COUPLER
DESIGN PONDING ELEVATION
UNDERDRAIN PIPE, SEE
SOIL TIGHT 45°
BENDS
EXTEND CLEANOUT
2" (MIN) ABOVE DESIGN
PONDING ELEVATION
STREAMBED COBBLES,
SEE SPECIFICATIONS
BC
5.2
SOIL TIGHT COUPLER
HDPE SDR 17 PIPE OR
EQUAL, SEE NOTE 2
GC
2.9
WALL PENETRATION,
SEE GC
2.11
GC
2.10
GC
2.9
2' x 2' x 1' THICK
CONCRETE COLLAR
LANDSCAPING
LANDSCAPINGPAVED AREA
BC
5.2
GENERAL COMPONENTSGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
5.1
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3.3
TREE WELL FILTERGREEN INFRASTRUCTURE
TYPICAL DETAILS
REVISED
VERSION
DATE
1.1
TW
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1.1
PURPOSE:
TREE WELLS CONTROL PEAK FLOWS AND VOLUMES OF STORMWATER RUNOFF BY PROVIDING SURFACE STORAGE, SUBSURFACE STORAGE, AND INFILTRATION INTO
NATIVE SOIL. WATER IS ALSO TREATED AS IT FILTERS THROUGH THE BIOTREATMENT SOIL.
DESIGNER NOTES & GUIDELINES:
1. THE DESIGNER MUST ADAPT PLAN AND SECTION DRAWINGS TO ADDRESS SITE-SPECIFIC CONDITIONS. IF USING A MODULAR SUSPENDED PAVEMENT SYSTEM,
CONTACT THE MANUFACTURER FOR DESIGN DETAILS AND GUIDANCE.
2. TREE WELL AREA, PONDING DEPTH, BIOTREATMENT SOIL DEPTH, AND AGGREGATE STORAGE DEPTH MUST BE SIZED TO MEET PROJECT HYDROLOGIC
PERFORMANCE GOALS. C.3. REGULATED PROJECTS MAY REQUIRE EXPANSION OF TREE WELL VOLUME UNDER THE PAVEMENT USING INFILTRATION TRENCHES,
STRUCTURAL SOIL, AND/OR MODULAR PAVEMENT SUPPORT CELLS. SEE CHAPTERS 4 AND 6 OF THE SMCWPPP C.3 REGULATED PROJECTS GUIDE FOR
ADDITIONAL GUIDANCE ON SIZING, TREE WELL FILTERS, AND TREE PLANTING.
3. FACILITY DRAWDOWN TIME (i.e. TIME FOR SURFACE PONDING TO DRAIN THROUGH THE ENTIRE SECTION INCLUDING AGGREGATE STORAGE AFTER THE END OF A
STORM) REQUIREMENTS:
x 48 HOUR (PREFERRED), 72-HOUR MAXIMUM FACILITY DRAWDOWN. IF DRAWDOWN CANNOT BE ACHIEVED, UNDERDRAIN IS REQUIRED.
4. THE TREE WELL PLANTER EDGE SHOULD BE DELINEATED WITH A 6-INCH HIGH CURB (PREFERRED), LOW RAILING, OR TREE GRATE TO PREVENT PEOPLE FROM
ENTERING THE PLANTER. THE VERTICAL DROP BETWEEN THE TREE WELL AND ADJACENT PATH OF TRAVEL MUST COMPLY WITH ACCESSIBILITY REQUIREMENTS.
WHEN A TREE GRATE IS USED, A MINIMUM SEPARATION OF 4 INCHES BETWEEN THE GRATE AND TREE TRUNK SHOULD BE MAINTAINED. REFER TO SECTION 3.1 OF
THE SMCWPPP GI DESIGN GUIDE FOR DETAILED GUIDANCE ON CURB, RAILING, AND OTHER EDGE TREATMENTS.
5. RECOMMENDED TREE ROOT VOLUME IS 400 CUBIC FEET FOR SMALL TREES (6-INCH DIAMETER TRUNK), 1,000 CUBIC FEET FOR MEDIUM SIZED TREES (16-INCH
DIAMETER TRUNK), AND 1,400 CUBIC FEET FOR LARGE TREES (24-INCH DIAMETER TRUNK), WHERE VOLUMES ARE BASED ON A 3-FOOT DEPTH PLANTER AREA. IN
CONSTRAINED SITES, ROOT CHANNELS, MODULAR PAVEMENT SUPPORT CELLS, AND OTHER TECHNIQUES CAN BE USED TO EXPAND THE TREE ROOT VOLUME.
CONSULT WITH A DESIGN PROFESSIONAL TO ENSURE SUFFICIENT TREE ROOT VOLUME IS PROVIDED FOR TREE HEALTH.
6. WHEN A TREE WELL IS BEHIND A STREET CURB, VERTICAL ELEMENTS OF THE TREE WELL THAT ARE MORE THAN 12 INCHES ABOVE THE ROAD SURFACE SHALL BE
SETBACK 18 INCHES FROM THE FACE OF CURB. TREE PLACEMENT SHOULD NOT IMPACT SIGHT DISTANCE FOR EXISTING DRIVEWAYS AND ON-STREET PARKING
OR EXISTING DRIVEWAY AND PARKED VEHICLE INGRESS AND EGRESS.
7. TREE SPECIES AND UNDERSTORY PLANTS (IF USED) SHALL BE SPECIFIED BY A DESIGN PROFESSIONAL. PROVIDE MINIMUM 2-FOOT CLEARANCE BETWEEN TREE
TRUNK AND UNDERSTORY PLANTS TO REDUCE COMPETITION FOR WATER, NUTRIENTS, AND ROOT SPACE WITH TREES. SEE SECTION 6.3 AND APPENDIX A OF THE
SMCWPPP C.3 REGULATED PROJECTS GUIDE FOR GUIDANCE ON RECOMMENDED TREE SPECIES.
8. THE PREFERRED SIZE FOR A TREE WELL OPENING IS 6-FEET WIDE AND 6-FEET LONG, FOR A PLANTER AREA OF 36 SQUARE FEET. WHERE SIDEWALK WIDTH IS
CONSTRAINED, WIDTH MAY BE 4 FEET MINIMUM AND A DESIRED LENGTH OF 8 FEET WITH A MINIMUM OF 5 FEET.
9. MULTIPLE TREES IN A TREE TRENCH SHOULD BE SPACED APPROXIMATELY 25 FEET TO 35 FEET APART DEPENDING ON TREE SPECIES.
10. IF STREET PARKING IS PROHIBITED ADJACENT TO THE SIDEWALK/TREE WELL AREA, THE STEPOUT ZONE CAN BE REMOVED AND THE TRENCH DRAIN INLET CAN BE
CHANGED TO A SIMPLER CURB CUT INLET.
11. IF FULL TRASH CAPTURE IS A PROJECT REQUIREMENT, THE DESIGNER SHOULD DETERMINE IF ADDITIONAL MEASURES ARE NEEDED TO MEET THE REGIONAL
WATER QUALITY BOARD'S TRASH FULL CAPTURE REQUIREMENTS, i.e. TRASH CAPTURE INLET STRUCTURE.
12. THE DESIGNER MUST EVALUATE UTILITY SURVEYS FOR POTENTIAL UTILITY CROSSINGS OR CONFLICTS. REFER TO GC 2.1 - GC 2.12 FOR UTILITY CROSSING
DETAILS AND GC 3.1 - GC 3.3 FOR UTILITY CROSSING CONFLICT DETAILS.
13. MINIMUM UTILITY SETBACKS AND PROTECTION MEASURES MUST CONFORM TO CURRENT JURISDICTIONAL ASSET PROTECTION STANDARDS. IN THE ABSENCE OF
THESE STANDARDS, THE DESIGNER SHALL REFER TO CHAPTER 3 OF THE SMCWPPP GI DESIGN GUIDE FOR BEST PRACTICES AND COORDINATE DIRECTLY WITH
RELEVANT UTILITY PROVIDERS FOR REQUIREMENTS.
RELATED COMPONENTS
EDGE TREATMENTS:
INLETS:
OUTLETS:
SOIL AND AGGREAGTE LAYERS:
UNDERDRAINS:
LINERS:
UTILITY CROSSINGS:
UTILITY CONFLICTS:
OBSERVATION PORTS:
CLEANOUTS:
-BC
1.1
BC
1.7
-BC
3.1
BC
3.4
GC
1.2
BC
4.1
GC
1.1
GC
5.1
-GC
2.1
GC
2.12
BC
2.5
BC
2.4
BC
1.1
GC
5.2
GC
5.1
GC
4.2
GC
4.1
SLOTTED UNDERDRAIN,
SEE
NOTES:
1. PREFERRED TREE WELL OPENING SIZE IS 6 FEET BY 6 FEET, BUT CONSTRAINED SITES CAN REDUCE WIDTH TO 4 FEET PROVIDED THEY CAN ACCOMMODATE
MINIMUM REQUIRED TREE ROOT VOLUME BY INCREASING LENGTH AND/OR USING STRUCTURAL SOIL, PERVIOUS PAVEMENT, AND/OR SUSPENDED
PAVEMENT SYSTEMS UNDER ADJACENT SIDEWALK. IF ADJACENT TO LANDSCAPED AREAS, EXTEND THE BOUNDARY TO BACK OF SIDEWALK TO ALLOW TREE
ROOTS TO ACCESS ADJACENT LANDSCAPED AREAS WITH NATIVE SOIL.
2. DESIGNER TO SPECIFY MINIMUM SIDEWALK WIDTH BEHIND AND STEP-OUT ZONE IN FRONT OF TREE WELL THAT COMPLIES WITH ALL APPLICABLE AGENCY
AND ADA REQUIREMENTS. STEP-OUT ZONE CAN BE ELIMINATED IF PARKING IS PROHIBITED ALONG CURB. SEE DESIGNER NOTES.
3. IF CURB DRAIN, I.E. SHALLOW PIPES, ARE USED TO CONVEY SURFACE WATER BETWEEN TREE WELLS, 3 INCH CAST IRON PIPES SHALL BE INSTALLED AND A
MINIMUM COVER OF 1-1/2 INCHES OF CONCRETE OVER PIPES SHALL BE PROVIDED. IF TRENCH DRAIN IS USED, THE GRATE SHALL BE ADA COMPLIANT AND
HAVE A NON-SLIP SURFACE.
CONNECT TO STORM SEWER
PERVIOUS PAVEMENT
(OPTIONAL)
TREE SPACING VARIES PER SPECIES, 25'-35' (TYP)
POTENTIAL EXPANDED TREE
ROOT VOLUME USING
STRUCTURAL SUPPORT,
SEE NOTE 1
EXTEND UNDERDRAIN THROUGH
AGGREGATE STORAGE LAYER OF
PERMEABLE PAVEMENT,
STRUCTURAL SOIL, AND/OR
SUSPENDED PAVEMENT
SYSTEMS (OPTIONAL)
2' (MIN)
STEP OUT ZONE
SEE NOTE 2
4' (MIN)
SEE NOTE 1
TRENCH DRAIN INLET,
SEE BC
2.5
SPLASH APRON, NOT
INTEGRAL TO CURB,
SEE BC
2.2
EMBEDDED COBBLE
ENERGY DISSIPATOR,
SEE BC
2.6
CLEANOUT
DRAINAGE NOTCH
(TYP), SEE BP
2.2
5' (MIN), SEE NOTE 1
DEPRESSED TREE
PLANTER
OVERFLOW STRUCTURE
WITH BEEHIVE GRATE,
SEE BC
3.4
6" RAISED CURB
OR LOW FENCE
4' (MIN)
THROUGHWAY
TRENCH DRAIN OR CURB DRAIN
TO DIRECT OVERFLOW TO NEXT
TREE WELL, SEE NOTE 3
CLEANOUT
PARKING LANE
CURB AND
GUTTER PER SMC
DPW STD. D-3
6' (MIN)
SIDEWALK
BC
5.2
BC
5.1
6' (PREFERRED),
4' (MIN)
A
TW
1
.
3
BC
2.4
NOTES:
1. STEP-OUT WIDTH SHALL COMPLY WITH ALL APPLICABLE
AGENCY AND ADA STANDARDS.
2. IF STRUCTURAL SOIL AND/OR OTHER METHODS ARE NOT
USED TO EXPAND TREE ROOT VOLUME BEYOND TREE
PLANTER, EDGE RESTRAINT SHALL BE EXTENDED TO
BOTTOM OF BIOTREATMENT SOIL.
3. IF TREE WELL LENGTH EXCEEDS 6 FEET, LATERAL
BRACING AND/OR FOOTINGS MAY BE REQUIRED.
DESIGNER TO SPECIFY.
4. IF ADDITIONAL ROOTABLE SOIL VOLUME IS NEEDED,
DESIGNER MAY SPECIFY THE USE OF ADDITIONAL
STRUCTURAL SOIL OR SUSPENDED PAVEMENT SYSTEMS
UNDER THE SIDEWALK BASE IF ALLOWED BY PUBLIC
WORKS.
5. ROOT BALL SIZE TO BE SPECIFIED BY THE DESIGNER AND
APPROVED BY THE CITY ARBORIST IF WITHIN PUBLIC
RIGHT-OF-WAY.
6. IF POSSIBLE, DO NOT USE A LINER IF SUSPENDED
PAVEMENT SYSTEMS ARE USED. THE LINER WILL NOT
ALLOW TREE ROOTS TO GROW INTO THE NATIVE SOIL
BEHIND THE SIDEWALK.
7. REFER TO DESIGNER NOTES FOR ADDITIONAL DESIGN
GUIDANCE.
SECTION A
4' (MIN)
ROOT BALL,
SEE NOTE 5
DESIGN PONDING
ELEVATION (6" MAX)
CONC. CURB W/ DRAINAGE NOTCHES, SEE
OR LOW FENCING, DESIGNER TO SPECIFY
BP
2.2
EXPANSION JOINT AND DOWEL PER PW STDS
STANDARD SIDEWALK ADJACENT
LANDSCAPING
2' (MIN)
SEE NOTE 1
CURB AND GUTTER
PER SMC DPW STD. D-3
PERMEABLE PAVEMENT WITHIN
STEP-OUT AREA (OPTIONAL)
6" (MIN)
UNCOMPACTED
SUBGRADE
ANGLE OF REPOSE PER
GEOTECHNICAL
ENGINEER'S
RECOMMENDATION
COMPACTED SUBGRADE,
STRUCTURAL SOIL, OR SUSPENDED
PAVEMENT SYSTEMS, SEE NOTE 4
OPTIONAL LINER IF NEEDED TO
PROTECT ADJACENT PROPERTY,
DESIGNER TO SPECIFY, SEE NOTE 6
SCARIFIED AND
UNCOMPACTED
SUBGRADE
12" (MIN)
6"
(MIN)
COMPACTED NATIVE SOIL BENCH
FOR STRUCTURAL SUPPORT
COMPACTED SUBGRADE
STRUCTURAL SOIL OR SUSPENDED
PAVEMENT SYSTEMS, DEPTH VARIES,
DESIGNER TO SPECIFY PEDESTAL FOR
TREE ROOTBALL, SEE NOTES 2 & 4
BC
5.1
4" (MIN) SLOTTED UNDERDRAIN,
SEE BC
5.2
CLASS 2
PERMEABLE
AGGREGATE,
SEE
24"
(MIN)
6"
(MIN)
3" (MIN) MULCH
BIOTREATMENT SOIL MEDIA
1'-4" (MIN)
3'-0" (MAX)
SHORT CONC.
WALL SEE,
BC
1.3
OUTLET TO TRENCH DRAIN/SIDEWALK
CULVERT BEYOND, INVERT SET AT
DESIGN PONDING ELEVATION
BC
4.1
SEE NOTE 2
9th Edition – APRIL 12, 2024
9th Edition – APRIL 12, 2024
Development Review Checklist
Appendix G
Worksheet A
C.6 – Construction Stormwater BMPs
Yes
Control and prevent the discharge of all potential pollutants, including pavement cutting wastes,
paints, concrete, petroleum products, chemicals, wash water or sediments, rinse water from
architectural copper, and non-stormwater discharges to storm drains and watercourses.
Store, handle, and dispose of construction materials/wastes properly to prevent contact with
stormwater.
Do not clean, fuel, or maintain vehicles on-site, except in a designated area where wash water is
contained and treated.
Identify Plan sheet showing the appropriate construction Best Management Practices (BMPs) used on this project:
(Applies to all projects with earthwork)
Plan Sheet Best Management Practice (BMP)
Protect adjacent properties and undisturbed areas from construction impacts using vegetative
buffer strips, sediment barriers or filters, dikes, mulching, or other measures as appropriate.
Train and provide instruction to all employees/subcontractors re: construction BMPs.
Protect all storm drain inlets in vicinity of site using sediment controls such as berms, fiber rolls,
or filters.
Limit construction access routes and stabilize designated access points.
Attach the construction BMP plan sheet to project plans and require contractor to implement the
applicable BMPs on the plan sheet.
Use temporary erosion controls to stabilize all denuded areas until permanent erosion controls
are established.
Delineate with field markers clearing limits, easements, setbacks, sensitive or critical areas,
buffer zones, trees, and drainage courses.
Provide notes, specifications, or attachments describing the following:
Ŷ Construction, operation and maintenance of erosion and sediment controls, include inspection
frequency;
Ŷ Methods and schedule for grading, excavation, filling, clearing of vegetation, and storage and
disposal of excavated or cleared material;
Ŷ Specifications for vegetative cover & mulch, include methods and schedules for planting and
fertilization;
Ŷ Provisions for temporary and/or permanent irrigation.
Perform clearing and earth moving activities only during dry weather.
Use sediment controls or filtration to remove sediment when dewatering and obtain all necessary
permits.
Trap sediment on-site, using BMPs such as sediment basins or traps, earthen dikes or berms,
silt fences, check dams, soil blankets or mats, covers for soil stock piles, etc.
Divert on-site runoff around exposed areas; divert off-site runoff around the site (e.g., swales and
dikes).
Worksheet B
C.3 – Source Controls
Selectappropriatesourcecontrolsandidentifythedetail/plansheetwheretheseelementsareshown.
Yes Detail/Plan
Sheet No.
Ŷ Preserve existing native trees, shrubs, and ground cover to the maximum extent
possible
Ŷ Design landscaping to minimize irrigation and runoff, to promote surface infiltration
where appropriate, and to minimize the use of fertilizers and pesticides that can
contribute to stormwater pollution.
Ŷ Where landscaped areas are used to retain or detain stormwater, specify plants
that are tolerant of saturated soil conditions.
Ŷ Consider using pest-resistant plants, especially adjacent to hardscape.
Ŷ To insure successful establishment, select plants appropriate to site soils, slopes,
climate, sun, wind, rain, land use, air movement, ecological consistency, and plant
interactions.
Landscape/Outdoor
Pesticide Use
Pools, Spas, Decorative
Fountains, and ther
Water Features.
Food Service
Equipment (non-
residential)
Features that
require
source control
measures
Source Control Measures
(Refer to C.3 Guidebook Appendix D Pollutant Sources/Source Control
Checklist for detailed requirements )
Storm Drain
Floor Drains
Interior Parking Garage
Mark on-site inlets with the words “No Dumping! Flows to Bay” or equivalent.
Plumb interior floor drains to sanitary sewer [or prohibit].
Plumb interior parking garage floor drains to sanitary sewer.8
Need for Future Indoor
& Structural Pest
Note building design features that discourage entry of pests.
Provide sink or other area for equipment cleaning, which is:
Ŷ Connected to a grease interceptor prior to sanitary sewer discharge.8
Ŷ Large enough for the largest mat or piece of equipment to be cleaned.
Ŷ Indoors or in an outdoor roofed area designed to prevent stormwater run-on and
run-off, and signed to require equipment washing in this area.
If the local municipality requires pools to be plumbed to the sanitary sewer, place a
note on the plans and state in the narrative that this connection will be made
according to local requirements.
Outdoor Storage of
Equipment/ Materials
Ŷ Provide a roofed and enclosed area for dumpsters, recycling containers, etc.,
designed to prevent stormwater run-on and runoff.
Ŷ Connect any drains in or beneath dumpsters, compactors, and tallow bin areas
serving food service facilities to the sanitary sewer.8
Ŷ State how site refuse will be handled and provide supporting detail to what is
shown on plans.
Ŷ State that signs will be posted on or near dumpsters with the words “Do not dump
hazardous materials here” or similar.
Ŷ Cover the area or design to avoid pollutant contact with stormwater runoff.
Ŷ Locate area only on paved and contained areas.
Ŷ Roof storage areas that will contain non-hazardous liquids, drain to sanitary
sewer8, and contain by berms or similar.
Ŷ Storage of hazardous materials and wastes must be in compliance with the local
hazardous materials ordinance and a Hazardous Materials Management Plan for the
site.
Ŷ Where appropriate, reference documentation of compliance with the requirements
of Contra Costa Hazardous Materials Programs
Refuse Areas
Vehicle/ Equipment
Cleaning
Ŷ Roofed, pave and berm wash area to prevent stormwater run-on and runoff, plumb
to the sanitary sewer8, and sign as a designated wash area.
Ŷ Commercial car wash facilities shall discharge to the sanitary sewer.8
Ŷ If a car wash area is not provided, describe measures taken to discourage on-site
car washing and explain how these will be enforced.
Industrial Processes If industrial processes are to be located on site, state: “All process activities to be
performed indoors. No processes to drain to exterior or to storm drain system.”
Worksheet B
C.3 – Source Controls
Selectappropriatesourcecontrolsandidentifythedetail/plansheetwheretheseelementsareshown.
Plazas, Sidewalks, and
Parking Lots
Sweep plazas, sidewalks, and parking lots regularly to prevent accumulation of litter
and debris. Collect debris from pressure washing to prevent entry into the storm drain
system. Collect washwater containing any cleaning agent or degreaser and
discharge to the sanitary sewer not to a storm drain.
8 Any connection to the sanitary sewer system is subject to sanitary district approval.
9 Businesses that may have outdoor process activities/equipment include machine shops, auto repair, industries with pretreatment facilities.
Ŷ Fueling areas shall have impermeable surface that is a) minimally graded to
prevent ponding and b) separated from the rest of the site by a grade break.
Ŷ Canopy shall extend at least 10 ft. in each direction from each pump and drain
away from fueling area.
Ŷ Cover and/or grade to minimize run-on to and runoff from the loading area.
Ŷ Position downspouts to direct stormwater away from the loading area.
Ŷ Drain water from loading dock areas to the sanitary sewer.8
Ŷ Install door skirts between the trailers and the building.
Design for discharge of fire sprinkler test water to landscape or sanitary sewer.8
Ŷ Drain condensate of air conditioning units to landscaping. Large air conditioning
units may connect to the sanitary sewer.8
Ŷ Roof drains from equipment drain to landscaped area where practicable.
Ŷ Drain boiler drain lines, roof top equipment, all wash water to sanitary sewer.8
Ŷ Any drainage sumps on-site shall feature a sediment sump to reduce the quantity
of sediment in pumped water.
Ŷ Avoid roofing, gutters, and trim made of copper or other unprotected metals that
may leach into runoff.
Ŷ Include controls for other sources as specified by local reviewer.
Miscellaneous Drain or
Wash Water or Other
Sources
Fire Sprinkler Test Wate
Fuel Dispensing Areas
Loading Docks
Ŷ Designate repair/maintenance area indoors, or an outdoors area designed to
prevent stormwater run-on and runoff and provide secondary containment. Do not
install drains in the secondary containment areas.
Ŷ No floor drains unless pretreated prior to discharge to the sanitary sewer.8
Ŷ Connect containers or sinks used for parts cleaning to the sanitary sewer.8
Ŷ State that there are no tanks, containers or sinks to be used for parts cleaning or
rinsing or, if there are, note the agency from which an industrial waste discharge
permit will be obtained and that the design meets that agency’s requirements.
Vehicle/ Equipment
Repair and
Maintenance
Worksheet C
Low Impact Development – Site Design Measures
Select appropriate site design measures and Identify the Plan Sheet where these elements are shown.
Yes
Regulated Projects can also consider the following site design measures to reduce treatment system sizing:
Yes
a. Direct roof runoff into cisterns or rain barrels and use rainwater for irrigation or other non-potable use.
b. Direct roof runoff onto vegetated areas.
c. Direct runoff from sidewalks, walkways, and/or patios onto vegetated areas.
Select Appropriate Site Design Measures Regulated projects must meet all applicable Site Design Measures a th rough i. Projects that create and/or
replace between 2,500 and 5,000 sq.ft. of impervious surface, and detached single family homes that create/replace between 2,500 and 10,000 sq.ft. of
impervious surface, must include one or more of Site Design Measures a through f (Provision C.3.i requirements).10 Consult with municipal staff about
requirements for your project.
Plan Sheet No.Site Design Measures
i. Minimize impervious surfaces.
d. Direct runoff from driveways and/or uncovered parking lots onto vegetated areas.
e. Construct sidewalks, walkways, and/or patios with pervious or permeable surfaces. Use the
specifications in the CCCWP C.3 Guidebook downloadable at
https://www.cccleanwater.org/development-infrastructure/development
f. Construct bike lanes, driveways, and/or uncovered parking lots with pervious surfaces. Use the
specifications in the CCCWP C.3 Guidebook downloadable at
https://www.cccleanwater.org/development-infrastructure/development
g. Limit disturbance of natural water bodies and drainage systems; minimize compaction of highly
permeable soils; protect slopes and channels; and minimize impacts from stormwater and urban runoff
on the biological integrity of natural drainage systems and water bodies;
h. Conserve natural areas, including existing trees, other vegetation and soils.
10 See MRP Provision C.3.a.i.(6) for non-C.3 Regulated Projects, C.3.c.i.(2)(a) for Regulated Projects, C.3.i for projects that create/replace between 2,500 and
5,000 sq.ft. of impervious surface and detached single family homes that create/replace between 2,500 and 10,000 sq.ft. of impervious surface.
Plan Sheet No.Site Design Measures
j. Self-treating area (see Chapter 3 Figure 3-1 of the CCCWP C.3 Guidebook)
k. Self-retaining area (see Chapter 3 Figure 3-2 of the CCCWP C.3 Guidebook)
Project Name:
Project Address:
Cross Streets:
APN:
Special Project11?
C.3 Regulated?
Public or Private
Project?
DMA Identification
Number
Impervious
Area12 (ft2)
Pervious
Area13 (ft2)
Type of Site Design Measure or Treatment
Measure14
Sizing Criteria
Used15
Size
Required16
Size
Provided
Example DMA 1 5,000 2,000 Bioretention unlined with underdrain 2c: Flow 208 ft2 220 ft2
Example DMA 2 1,000 1,000 Self-retaining area Other < 2:1 ratio 1:1 ratio
Example DMA 3 1,000 - Infiltration trench 1b: Volume 1,000 ft3 1,100 ft3
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
add rows, if needed
TOTALS - - N/A N/A N/A N/A
Totals from Project
Info Sheet Cells
- -
Rainwater Harvesting/Use Measures:
Rainwater Harvesting for indoor non-potable water use
Rainwater Harvesting for landscape irrigation use
Worksheet D
Stormwater Treatment Measures and Site Design Measures by Drainage Management Area (DMA)
C.3 Regulated Projects and Non-Regulated GI Projects
Check all applicable boxes, answer questions and fill in cells related to the site design and treatment measure(s) included in the project.
Is the project harvesting and using
rainwater? Yes
Drainage Management Area Summary Table
11 Special Projects are smart growth, high density, transit-oriented or affordable housing developments with the criteria defined in Provision C.3.e.ii.(2), (3) or (4) (see Worksheet F).
12 The sq.ft. of impervious area within the Drainage Management Area
13 The sq.ft. of pervious area within the Drainage Management Area
14 "Lined” refers to an impermeable liner placed on the bottom of a bioretention area, such that no infiltration into native soil occurs.
15 Select from the menu which of the following Provision C.3.d.i hydraulic sizing methods was used, if any. Volume based approaches: 1(a) Urban Runoff Quality Management
approach, or 1(b) 80% capture approach (recommended volume-based approach). Flow-based approaches: 2(a) 10% of 50-year peak flow approach, 2(b) 2 times the 85th percentile
rainfall intensity approach, 2(c) 0.2-Inch-per-hour intensity approach (recommended flow-based approach - also known as the 4% rule for bioretention), or 3 Combination flow and
volume-based approach. "Other" is used for Site Design Measures such as Self-Retaining or Self-Treating Areas.
16 Each DMA should drain to one treatment area (unless it is self-treating or self-retaining). If multiple DMAs are draining to one treatment area, they should be combined into one DMA.
If one DMA drains to multiple treatment areas, that DMA should be split up so there is one DMA per treatment area (which allows the treatment area to be properly sized).
A long term Operations and Maintenance (O&M) Agreement and Plan for this project will be required. Please contact the municipality for an agreement template
and/or consult the CCCWP C.3 Guidebook downloadable at https://www.cccleanwater.org/development-infrastructure/development
Complete the information below at the Entitlement, Building Permit and Certificate of Occupancy stages for Regulated C.3 Projects and Non-Regulated Green
Infrastructure Projects. (The first four cells are automatically filled in from the Project Info sheet.)
Public projects are those on public property or ROW; private projects are on privately-owned property but
can include improvements in the public ROW required as part of the project.
of C.3.d amount of runoff treated by Non-LID Systems on the Special Project site.
Worksheet E
Hydromodification Management
E-1 Is the project a Hydromodification17 Management (HM) Project?
E-1.1 Is the total impervious area increased over the pre-project condition?
Yes. Continue to E-1.2
No. Go to Item E-1.3 and check “No.”
E-1.2
No. Go to E-1.3 and Check "Yes".
E-1.3 Is the project a Hydromodification Management Project?
No. The project is EXEMPT from HM requirements.
E-2 Incorporate HM Controls (if required)
Are the applicable items provided with the Plans?
Yes No N
Ź If the project is subject to the HM requirements, incorporate in the project flow duration control measures designed such
that post-project discharge rates and durations match pre-project discharge rates and durations.
Ź The Bay Area Hydrology Model (BAHM) has been developed to help size flow duration controls. See
www.clearcreeksolutions.info/downloads. Guidance is provided in Chapter 3 of the CCCWP C.3 Guidebook.
Is the site located in an HM Exempt Area per the HM Applicability map (Chapter 3 of the CCCWP C.3 Guidebook)?
Yes. Attach map, indicating project location. Go to Item E-1.3 and check “No.”
Yes. The project is subject to HM requirements in Provision C.3.g of the Municipal Regional Stormwater
Permit.
17 Hydromodification is the change in a site’s runoff hydrograph, including increases in flows and durations that results when land is developed (made more impervious). The
effects of hydromodification include, but are not limited to, increased bed and bank erosion of receiving streams, loss of habitat, increased sediment transport and/or
deposition, and increased flooding. Hydromodification control measures are designed to reduce these effects.
Site plans with pre- and post-project impervious surface areas, surface flow
directions of entire site, locations of flow duration controls and site design measures
per HM site design requirement
Soils report or other site-specific document showing soil type(s) on site
If project uses the Bay Area Hydrology Model (BAHM), a list of model inputs and
outputs.
If project uses custom modeling, a summary of the modeling calculations with
corresponding graph showing curve matching (existing, post-project, and post-
project with HM controls curves), goodness of fit, and (allowable) low flow rate.
If project uses the Impracticability Provision, a listing of all applicable costs and a
brief description of the alternative HM project (name, location, date of start up,
entity responsible for maintenance).
If the project uses alternatives to the default BAHM approach or settings, a written
description and rationale.
Worksheet F
Special Projects
F-1
Special Project Category “A”
Does the project have ALL of the following characteristics?
No (continue)
Yes – Complete Section F-2 below
Special Project Category “B”
Does the project have ALL of the following characteristics?
No (continue)
Yes – Complete Section F-2 below
Special Project Category “C”
Complete the Special Project Category C Requirements
Does the project meet ALL of the required characteristics for Category C?
No
Yes – Complete Section F-2 below
Complete this worksheet for projects that appear to meet the definition of “Special Project”, per Provision C.3.e.ii of the Municipal Regional Stormwater
Permit (MRP). The form assists in determining whether a project meets Special Project criteria, and the percentage of low impact development (LID)
treatment reduction credit. Special Projects that implement less than 100% LID treatment must provide a narrative discussion of the feasibility or infeasibility
of 100% LID treatment. See Chapter 3 Table 3-8 of the See Chapter 3 Table 3-8 of the CCCWP C.3 Guidebook (download at
https://www.cccleanwater.org/development-infrastructure/development ) for more information.
“Special Project” Determination (Check the boxes to determine if the project meets any of the following categories.)
Located in a municipality’s designated central business district, downtown core area or downtown core zoning
district, neighborhood business district or comparable pedestrian-oriented commercial district, or historic
preservation site and/or district;
Creates and/or replaces 0.5 acres or less of impervious surface - enter answer in F-2 table;
Includes no surface parking, except for incidental parking for emergency vehicle access, ADA access, and
passenger or freight loading zones;
Has at least 85% coverage of the entire site by permanent structures. The remaining 15% portion of the site may
be used for safety access, parking structure entrances, trash and recycling service, utility access, pedestrian
connections, public uses, landscaping and stormwater treatment - enter answer in F-2 Table
Located in a municipality’s designated central business district, downtown core area or downtown core zoning
district, neighborhood business district or comparable pedestrian-oriented commercial district, or historic
preservation site and/or district15;
Creates and/or replaces more than 0.5 acres of impervious area and less than 2.0 acres - enter answer in F-2
Table;
Includes no surface parking, except for incidental parking for emergency access, ADA access, and passenger or
freight loading zones;
Has at least 85% coverage of the entire site by permanent structures. The remaining 15% portion of the site may
be used for safety access, parking structure entrances, trash and recycling service, utility access, pedestrian
connections, public uses, landscaping and stormwater treatment - enter answer in F-2 Table;
Minimum gross density of either 50 dwelling units per acre (for residential projects) or a Floor Area Ratio (FAR) of
2:1 (for commercial projects) - mixed use projects may use either criterion16 - enter answer in F-2 Table;
Is a preserved housing project with a deed restriction running at least 55 years, at rent/mortgage 30% of the
maximum Area Median Household Income (AMI) limits adjusted for household size based on the maximum
percentage of AMI for each income category, according to the Federal Department of Housing and Urban
Development's (HUD's) definition of affordable housing in metropolitan areas.17
Primarily a residential project, i.e., at least two-thirds of the square footage of the project is designated for
residential use.18
Minimum Gross19 density of 40 Dwelling Units (DUs) per acre.
a. Total number of DUs:__________
b. Total number of Managers' Units20:__________
Credit
Multiplier
0.20
1.00
2.00
3.00
4.00
41% X 50%
91% X
50%
100%
51% X 60%
61% X 70%
71% X 80%
81% X 90%
60%
70%
80%
90%
21% X 30%
31% X 40%
30%
40%
X 9%
10% X 20%
0%
20%
Step 2 - Allowable Affordable Housing Credits: Use Table 1b to identify the correct Weighted Sum Category for the Weighted Sum
calculated in step 1. This is the Allowable Affordable Housing Credit. For example, if the Weighted Sum is 45%, that would fall into the 41-
50% Weighted Sum Category, and the maximum Allowable Affordable Housing Credit availabe to the project would be 50%.
Table 1b - Allowable Affordable Housing Credit Calculation
Weighted Sum (X) Category Allowable Affordable Housing Credit Applicable Weighted Sum Category
(Select One)
0%
0%
Available Credit (% of
DUs * Credit Multiplier)
0%
0%
0%
0%
Weighted Sum (Rounded)
Number of DUs Density/Criteria
15 And built as part of a municipality’s stated objective to preserve/enhance a pedestrian-oriented type of urban design.
16 The MRP establishes definitions for "Gross Density"(GD) & FAR. GD is defined as, "the total number of residential units divided by the acreage of the entire site area, including
land occupied by public rights-of-way, recreational, civic, commercial and other non-residential uses." FAR is defined as," the Ratio of the total floor area on all floors of all
buildings at a project site (except structures, floors, or floor areas dedicated to parking) to the total project site area.
17 For metropolitan areas, HUD defines Acutely Low household incomes at 0-15% of AMI, Extremely Low household incomes at 16-30% of AMI, Very Low household incomes as
31-50% of AMI, Low household incomes as 51-80% of AMI, and Moderate household incomes as 81-210% of AMI
18 Emergency homeless shelters constructed pursuant to and consistent with Government Code § 8698.4, including the definition of "homeless shelter" in subdivision (c), and that
are temporary , are exempt from stormwater treatment requirements, and are required to implement site design measures (MRP Provision C.3.i) and relevant BMPs for
unsheltered populations (Provision C.17).
19 Gross density is defined as the total number of residential units divided by the acreage if the entire site area, including land occupied by public rights-of-way, recreational, civic,
commercial, and other non-residential uses.
Step 1 - Weighted Sum Calculation: Calculate the percentage of the project's Dus in each AMI catergory. Multiply the percentage of the
project's DU's in each AMI category by the respective credit multiplier, per Table 1a below. Add the available credits for each affordable
category to produce a weighted sum, and round to the nearest whole number
c. Total number of DUs for Affordable Credit Calculation (a-b):__________ (Usw this number for calculating percentages in Table 1a)
Table 1a - Weighted Sum Calculation
AMI
Moderate (120% of AMI)
Low (80% of AMI)
Very Low (50% of AMI)
Extremely Low (30% of AMI)
Acutely Low (15% of AMI)21
F-2 LID Treatment Reduction Credit Calculation
If more than one category applies, choose only one of the applicable categories and fill out the table for that category.
Fill in all cells with blue highlighting that pertain to the chosen Special Project Category.
Category
Site
Coverage
(%)
Project
Density16
or FAR16
Allowable
Credit
(%)
Applied
Credit
(%)
A N.A. 100%
50%
75%
100%
N.A. 0-100%
5%
10%
5%
10%
15%
5%
0%
F-3 Narrative Discussion of the Feasibility/Infeasibility of 100% LID Treatment:
F-4 Select Certified Non-LID Treatment Measures:
20 Up to three Dus that are used as building managers' DUs may be excluded from the percentage calculations.
21 DUs that are free to tenants, i.e., that do not charge tenants any rent/mortgage, are included in this category.
22"Transit hub" is defined as a rail, light rail, or commuter rail station, ferry terminal, or bus transfer station served by three or more bus routes. (A bus stop with no
supporting services does not qualify.)
23A "planned Priority Development Area" is an infill development area formally designated by the Association of Bay Area Government's/Metropolitan Transportation
Commissions's FOCUS regional planning program.
24 TAPE certification is used in order to satisfy Special Project’s reporting requirements in the MRP.
If the project will include non-LID treatment measures, select a treatment measure certified for “Basic” General Use Level
Designation (GULD) by the Washington State Department of Ecology’s Technical Assessment Protocol – Ecology (TAPE24). See
guidance in Chapter 3 of the CCCWP C.3 Guidebook.
If project will implement less than 100% LID, prepare a discussion of the feasibility or infeasibility of 100% LID treatment, as
described in Chapter 3 of the CCCWP C.3 Guidebook.
Location Credit (select one):
Entire project is located within 1/4 mile of
transit hub22
Entire project is located within a planned
PDA23
Density Credit (select 1):
Res 40 DU/ac
C
TOTAL CREDIT =
Res 60 DU/ac
Res 100 DU/ac
Parking Credit (select one):
No surface parking
Affordable Housing Credit - from Table
Impervious Area
Created/Replaced
(sq. ft.)
B
Density/Criteria
See above in F-1
Res 50 DU/ac or FAR 2:1
Res 75 DU/ac or FAR 3:1
Res 100 DU/ac or FAR 4:1
Worksheet G
(For municipal staff use only)
G-1
Yes No Name of Reviewer:
G-2
Yes No If yes, then add site to Staff’s Monthly Rainy Season Construction Site Inspection List
G-3
Yes No If yes, then add site to Staff’s Lists for Construction and O&M inspections (C.3 and C.3.h)
Operations and Maintenance (O&M) Submittals
G-4 Stormwater Treatment Measure and/HM Control Owner or Operator’s Information:
Name:
Address:
Phone: Email:
The following questions apply to C.3 Regulated Projects and Hydromodification Management Projects.
Yes No N/A
G-4.1 Was maintenance plan submitted?
G-4.2 Was maintenance plan approved?
G-4.3 Was maintenance agreement submitted?
(Date executed: )
Ź Attach the executed maintenance agreement as an appendix to this checklist.
G-5 Annual Operations and Maintenance (O&M) Submittals (for municipal staff use only):
G-6 Comments (for municipal staff use only):
Alternative Certification: Were the treatment and/or HM control sizing and design reviewed by a qualified third-party
professional that is not a member of the project team or agency staff?
High Priority Site: High Priority Sites can include those located in or within 100 feet of a sensitive habitat, an Area of
Special Biological Significance (ASBS), a body of water, or on "hillside projects" disturbing >=5,000 sq.ft. of land and with
steep slopes (of >=15% - see cell I.A.5 - or as identified by municipal criteria or map). These sites are subject to monthly
inspections from Oct 1 to April 30. See MRP Provision C.6.e.ii.(2)(b) and C.6.e.ii.(2)(c).
Inspections of Sites with Pervious Pavement: Regulated projects that are installing 3,000 sq.ft. or more of pervious
pavement (see cell I.B.1.g) (excluding private-use patios in single family homes, townhomes, or condominiums) must have
the pavement system inspected by the jurisdiction upon completion of the installation and the site must be added to the
jurisdiction’s list of sites needing inspections at least once every five years – see provision C.3.h. Pervious pavement
systems include pervious concrete, pervious asphalt, pervious pavers and grid pavers etc. and are described in the
Stormwater C.3 Guidebook downloadable at: https://www.cccleanwater.org/development-
infrastructure/development/stormwater-c-3-guidebook.
Ź Applicant must call for inspection and receive inspection at completion of installation of treatment measures and/or
hydromodification management controls including any pervious pavement areas of 3,000 sq.ft. or more.
For C.3 Regulated Projects and Hydromodification Management Projects, indicate the dates on which the Applicant
submitted annual reports for project O&M:
Worksheet G
(For municipal staff use only)
G-7 NOTES (for municipal staff use only):
Project Info Notes:
Worksheet A Notes:
Worksheet B Notes:
Worksheet C Notes:
Worksheet D Notes:
Worksheet E Notes:
Worksheet F Notes:
G-8 Project Close-Out (for municipal staff use only):
Yes No N/
8.1 Were final Conditions of Approval met?
8.2
(Date of inspection: )
8.3 Was maintenance plan submitted?
(Date executed: )
8.4
(Date provided to inspection staff: )
G-9 Project Close-Out (Continued -- for municipal staff use only):
Name of staff confirming project is closed out:
Signature: Date:
Name of O&M staff receiving information:
Signature: Date:
Was initial inspection of the completed treatment/HM measure(s)
conducted?
Was project information provided to staff responsible for O&M verification
inspections?
Worksheet Summary
(For municipal staff use only)
ProjectName ProjectLocation[1],StreetAddress NameofDeveloper ProjectPhaseNo.[2] ProjectDescription[3] ProjectWatershed[4]TotalSiteArea
(Acres)
TotalAreaofLand
Disturbed
(Acres)
TotalNew
ImperviousSurface
Area(ft2)[5]
TotalReplaced
Impervious
SurfaceArea
(ft2)[6]
TotalPreͲProject
ImperviousSurface
Area[7](ft2)
TotalPostͲProject
ImperviousSurface
Area[8](ft2)
ProjectName ApplicationDateApplicationDeemed
CompleteDate[9]
ApplicationFinal
ApprovalDate[10]
EstimatedorActual
CompletionDate SourceControlMeasures[11]SiteDesign
Measures[12]
Treatment
Systems
Approved[13]
TypeofOperation
&Maintenance
Responsibility
Mechanism[14]
HydraulicSizing
Criteria[15]
Alternative
Compliance
Measures[16]/[17]
Alternative
Certification[18]
HM
Controls[19]/[20]
O&MAgreement
recordedwithdeed
ј
See
WorksheetB
ј
SeeWorksheetC
ј
SeeWorksheet
D
ј
See
WorksheetD
ј
See
WorksheetG
ј
See
WorksheetE
[1]Includecrossstreets
[2]Ifaprojectisbeingconstructedinphases,indicatethephasenumberanduseaseparaterowentryforeachphase.Ifnot,enter“NA”.
[4]Statethewatershed(s)inwhichtheRegulatedProjectislocated.Downstreamwatershed(s)maybeincluded,butthisisoptional.
[3]ProjectTypeisthetypeofdevelopment(i.e.,newand/orredevelopment).Exampledescriptionsofdevelopmentare:5Ͳstoryofficebuilding,residentialwith160singleͲfamilyhomeswithfive4Ͳstorybuildingstocontain200condominiums,100unit2Ͳstory
shoppingmall,mixeduseretailandresidentialdevelopment(apartments),industrialwarehouse.
C.3.b.iv.(2) ʇRegulated Projects Reporting Table (part 1) – Projects Approved During the Fiscal Year Reporting Period
C.3.b.iv.(2) ʇRegulated Projects Reporting Table (part 2) – Projects Approved During the Fiscal Year Reporting Period
Private
Public
Private
Public
Worksheet Summary
(For municipal staff use only)
[5]Allimpervioussurfacesaddedtoanyareaofthesitethatwaspreviouslyexistingpervioussurface.
[6]Allimpervioussurfacesaddedtoanyareaofthesitethatwaspreviouslyexistingimpervioussurface.
[7]Forredevelopmentprojects,statethepreͲprojectimpervioussurfacearea.
[8]Forredevelopmentprojects,statethepostͲprojectimpervioussurfacearea.
[9]Forprivateprojects,stateprojectapplicationdeemedcompletedate.Iftheprojectdidnotgothroughdiscretionaryreview,reportthebuildingpermitissuancedate.
[10]Forprivateprojects,stateprojectapplicationfinaldiscretionaryapprovaldate.Iftheprojectdidnotgothroughdiscretionaryreview,reportthebuildingpermitissuancedate.
[11]Listsourcecontrolmeasuresapprovedfortheproject.Examplesinclude:properlydesignedtrashstorageareas;stormdrainstencilingorsignage;efficientlandscapeirrigationsystems;etc.SeeWorksheetB.
[12]Listsitedesignmeasuresapprovedfortheproject.Examplesinclude:minimizeimpervioussurfaces;conservenaturalareas,includingexistingtreesorothervegetation,andsoils;constructsidewalks,walkways,and/orpatioswithpermeablesurfaces,etc.SeeWorksheetC.
[13]Listallapprovedstormwatertreatmentsystem(s)tobeinstalledonsiteoratajointstormwatertreatmentfacility(e.g.,flowthroughplanter,bioretentionfacility,infiltrationbasin,etc.).SeeWorksheetD.
[15]SeeProvisionC.3.d.i.“NumericSizingCriteriaforStormwaterTreatmentSystems”forlistofhydraulicsizingdesigncriteria.Enterthecorrespondingprovisionnumberoftheappropriatecriterion(i.e.,1.a.,1.b.,2.a.,2.b.,2.c.,or3).SeeWorksheetD.
[16]ForAlternativeComplianceatanoffsitelocationinaccordancewithProvisionC.3.e.i.(1),onaseparatepage,giveadiscussionofthealternativecompliancesiteincludingtheinformationspecifiedinProvisionC.3.b.v.(1)(m)(i)fortheoffsiteproject.
[17]ForAlternativeCompliancebypayinginͲlieufeesinaccordancewithProvisionC.3.e.i.(2),onaseparatepage,providetheinformationspecifiedinProvisionC.3.b.v.(1)(m)(ii)fortheRegionalProject.
[18]NotewhetherathirdpartywasusedtocertifytheprojectdesigncomplieswithProvisionC.3.d.SeeWorksheetG.
[19]IfHMcontrolisnotrequired,statewhynot.SeeWorksheetE.
[14]Listthelegalmechanism(s)(e.g.,O&Magreementwithprivatelandowner;O&Magreementwithhomeowners’association;O&Mbypublicentity,etc…)thathavebeenorwillbeusedtoassignresponsibilityforthemaintenanceofthepostͲconstruction
[20]IfHMcontrolisrequired,statecontrolmethodused(e.g.,methodtodesignandsizedevice(s)ormethod(s)usedtomeettheHMStandard,anddescriptionofdevice(s)ormethod(s)used,suchasdetentionbasin(s),biodetentionunit(s),regionaldetentionbasin,orinͲstream
9th Edition – APRIL 12, 2024
9th Edition – APRIL 12, 2024
Worked Examples of Hydromodification
Sizing
Appendix H
APPENDIX H 9th Edition — APRIL 12, 2024 H-1
Appendix H
Worked Examples of Hydromodification Sizing
RESIDENTIAL EXAMPLE
A subdivision consisting of nine single-family home lots of unequal size and a cul-de-sac is proposed
in Bay Point, CA. The rectangular, 3-acre plot consists of former agricultural land now covered with
grasses with an average slope of 2% from east to west towards the existing roadway. The underlying
soil is HSG Type B with an infiltration rate of 0.24 inches per hour, as determined by onsite
infiltration testing during the initial planning phases of the project. The project is subject to both
the treatment and hydromodification requirements of the MRP Section C.3.
Figure 3-5: Residential Example Layout
The roof, driveway, landscape, and total lot area for the proposed subdivision is provided in the
table below. Each lot is between 0.25 and 0.33 acres in size and varies between 28 and 50%
impervious with three different house styles. The proposed cul-de-sac roadway footprint is
19,700 sf (0.45 ac). The remaining area is being saved for IMP at a starting IMP footprint to DMA
ratio of 0.05 for bioretention.
APPENDIX H 9th Edition — APRIL 12, 2024 H-2
Table 3-7: Residential Example Land Use Types
LOT # Roof Area Driveway Area Landscape Area Total Lot Area
(sf) (ac) (sf) (ac) (sf) (ac) (sf) (ac)
1 3,234 0.074 805 0.018 7,715 0.177 11,754 0.270
2 4,754 0.109 400 0.009 5,570 0.128 10,724 0.246
3 3,234 0.074 1,000 0.023 6,585 0.151 10,819 0.248
4 3,545 0.081 520 0.012 10,350 0.238 14,415 0.331
5 3,234 0.074 955 0.022 8,225 0.189 12,414 0.285
6 3,545 0.081 555 0.013 10,465 0.240 14,565 0.334
7 4,754 0.109 670 0.015 5,525 0.127 10,949 0.251
8 3,545 0.081 480 0.011 6,775 0.156 10,800 0.248
9 4,754 0.109 370 0.008 6,630 0.152 11,754 0.270
TOTAL 34,599 0.794 5,755 0.132 67,840 1.557 108,194 2.483
The following demonstrations include two options for compliance at the proposed development:
centralized bioretention and dispersed IMP.
Option A – Centralized Bioretention
Post-development stormwater runoff from all nine lots of the subdivided 3-acre project site will be
directed to the western edge of the site. There the stormwater will be treated and detained in one of
two IMP facilities proposed on either side of the entrance to the cul-de-sac prior to being discharged
to the receiving water body.
The pre-project BAHM scenario consists of a single basin [DMA] containing the full project site
with the characteristics described above: 3 acres of pervious area (B, Grass, Flat 0-5%).
As centralized IMPs are proposed, the mitigated [post-project] scenario is entered into BAHM2023 as
11 different basins [DMAs]: one for each of nine subdivided lots and one for each side of the
crested, cul-de-sac roadway. The acreage of impervious areas for roof (Roof Area) and driveways
(Driveway, Flat, 0-5%) as well as pervious landscaped areas (B, Grass, 0-5%) are included for each
of the basins with lots 1 through 4 draining to one IMP facility and lots 5 through 9 draining to the
other. The mitigated scenario configuration along with the basin properties for lots 1 through 4 are
shown in Figure 2.
APPENDIX H 9th Edition — APRIL 12, 2024 H-3
Figure 1: Mitigated Scenario Configuration for Residential Example Option A
(Note: BAHM2023 can experience difficulty in connecting elements that are in not in a straight line (same row or
column) in the schematic window. To work around this issue, place and connect elements in a straight line and
then move the elements to their desired location.)
Bioretention is the proposed IMP in this scenario. The two bioretention IMP have the same
properties but with slightly different footprints due to the larger impervious area draining to IMP#2.
The bioretention areas are 8 feet wide with vertical concrete walls and have the following properties
that were entered, as appropriate, into BAHM2023.
Width: 8 feet
Length: Variable (see below)
Freeboard: 0.5 feet
Ponding Depth: 1 foot
Bioretention Media Depth: 1.5 feet
Gravel Layer Depth: 2.4 feet
Infiltration Rate: 0.24 in/hr
No underdrains are required as the soil type is conducive to infiltration. The initial lengths and
corresponding footprints for each bioretention IMP are calculated by assuming a bioretention to
impervious area sizing ratio of 0.04 (or 4%). The total impervious area draining from lots 1 through
4 and roughly half of the cul-de-sac roadway to IMP#1 totals roughly 26,822 feet (0.62 ac). This
corresponds to an initial footprint of 1072 sf and a corresponding bioretention length of 134 feet.
The remaining impervious area draining to IMP#2 totals 33,232 sf (0.76 ac) which equals an initial
footprint of 1,328 sf for a corresponding length of 166 feet.
Lot5 Lot6Lot4
Lot3
Lot2
Lot1
Lot7
Lot8
Lot9
IMP#1 IMP#2
Street1
Street2
APPENDIX H 9th Edition — APRIL 12, 2024 H-4
The pre-project and mitigated [post-project]scenario flow duration curves from the BAHM2023
model runs are shown in Figure 3. The mitigated scenario exceeds the pre-project flow conditions
for all but the lowest flows and therefore the IMPs, as originally proposed, will not meet
requirements for hydromodification.
Figure 2: BAHM2023 Results from Residential Example Option A with IMP Sizing Ratio of 0.04
There are several options available for reducing runoff flow rates including increasing the footprint
of the IMP, increasing the storage capacity of the IMP, and/or restricting the outflow from the IMP
with a smaller discharge orifice. As no underdrains are proposed, the first two options are
appropriate. The IMP footprint to impervious DMA ratio is increased from 0.04 (4%) to 0.08 (8%)
for each IMP facility and the depth of the gravel storage layer is increased by 0.5 feet, to 3 feet total.
The additional 1,950 sf of bioretention IMP needed must be subtracted from the landscape areas of
Lots 1 and 9 so as to keep the IMP facilities within the 3-acre parcel. The flow duration curves for
the pre-project and mitigated (post-project) scenario model runs are shown in Figure 4. With the
increase in bioretention IMP footprint, the proposed project now meets the hydromodification
requirements of MRP Section C.3.
APPENDIX H 9th Edition — APRIL 12, 2024 H-5
Figure 3: BAHM2023 Results from Residential Example Option A with IMP Sizing Ratio of 0.08
Figure 4 shows that the proposed bioretention IMP are now slightly oversized as the mitigated flow
duration curve is well under the predevelopment curve. Further iterations of IMP area result in an
optimized bioretention IMP footprint to impervious DMA ratio of 7.5%, which results in a total
area of 2,012 sf for IMP#1 and 2,492 sf for IMP #2. The flow duration curves for the optimized
IMP areas are presented in Figure 5.
Figure 4: BAHM2023 Results from Residential Example Option A with IMP Sizing Ratio of 0.075
APPENDIX H 9th Edition — APRIL 12, 2024 H-6
Option B – Dispersed IMP
Post-development stormwater runoff from the nine lots of the subdivided 3-acre parcel is directed
to IMPs located within each lot. These include self-retaining landscape areas in the pervious area
footprint of the lot that manage runoff from the roofs and self-retaining driveways of permeable
pavement. Runoff from the cul-de-sac pavement is directed towards the western edge of the site,
similar to Option A. There, the stormwater will be treated and detained in one of two IMP facilities
proposed on either side of the entrance to the cul-de-sac prior to being discharged to the receiving
water body.
The pre-project BAHM scenario consists of a single basin [DMA]containing the full project site
with the characteristics described above: 3 acres of pervious area (B, Grass, Flat 0-5%).
The number of basins to model the runoff from the nine lots is the same as in Option A but the
configuration of each is much different. Each lot basin consists exclusively of the acreage for
impervious roof (Roof Area). The landscape area of each lot is modeled as self-retaining area
(Trapezoidal Pond) using the process described in the BAHM2023 User Manual. The driveways are
modeled as permeable pavement that are connected to the bioretention IMPs. The cul-de-sac basins
are connected directly to the bioretention IMPs as in Option A. Additionally, there are two new
basins that consist of pervious area (B, Grass, Flat 0-5%) that are within the bioretention IMP
footprint in Option A but are not in Option B given the reduced size of those IMP. This mitigated
scenario configuration is shown in Figure 6 and the properties for the self-retaining landscape area
and permeable pavement driveways are shown in Figure 7.
Figure 5: Mitigated Scenario Configuration for Residential Example Option B
Lot1
Lot2
Lot3
Lot4 Lot5 Lot6
Lot7
Lot8
Lot9
IMP#1 IMP#2
Street1
Street2
Add. Area#2Add. Area#1
APPENDIX H 9th Edition — APRIL 12, 2024 H-7
Figure 6: Properties for Self-Retaining IMP and Permeable Pavement IMP at Lot 1
There are three types of proposed IMP in this scenario: self-retaining landscape areas, permeable
pavement, and bioretention. There is a self-retaining IMP and a permeable pavement IMP for each
of the nine lots along with two bioretention IMP. Each of the individual IMP types for the lots
have the same properties but with different footprints to account for the variability in landscape and
driveway area presented in Table 1.
The self-retaining IMP are incorporated into BAHM2023 according to the instructions for self-
retaining areas on pages 76-79 of the BAHM 2023 User Manual. The entire landscape area for each
lot is considered to be self-retaining and entered as a trapezoidal pond with a square area in
BAHM2023 for simplicity. The roof area for each lot is the impervious DMA for the self-retaining
area. Per Table 1, the impervious-to-pervious (roof-to-landscape) ratio varies from as low as 0.34
(Lot 6) to as high as 0.85 (Lot 2), which are under the maximum threshold of 1:1 for self-retaining
IMP. Each self-retaining IMP was assigned an impoundment depth of 0.25 feet (3 inches) per the
requirements of this chapter. The other properties and inputs remain unchanged from those
presented in the BAHM 2023 User Manual.
Permeable pavement IMP all are modeled in BAHM 2023 using the same properties but with
slightly different footprints equal to each proposed lot’s driveway area. The permeable pavement
IMP are 10 feet wide with variable lengths and have the following additional properties:
Width: 10 feet
Length: Variable
Pavement Thickness: 0.5 feet
Pavement Porosity: 0.4
Gravel Layer Depth: 1.5 feet
Gravel Layer Porosity: 0.4
Ponding Depth: 0 feet
APPENDIX H 9th Edition — APRIL 12, 2024 H-8
Effective Depth: 2 feet
Effective Volume Factor: 1.00
Infiltration Rate: 0.24 in/hr
No underdrains are required as the soil type is conducive to infiltration. The permeable pavement
IMP are connected to the bioretention IMP so that any stormwater not stored or infiltrated in the
permeable pavement IMP is directed as runoff to the bioretention IMP.
The two bioretention IMP have the same properties but with slightly different footprints due to the
larger impervious area draining to IMP#2 from the cul-de-sac roadway. The bioretention areas are
8 feet wide with vertical concrete walls and have the following properties:
Width: 8 feet
Length: Variable (see below)
Freeboard: 0.5 feet
Ponding Depth: 1 foot
Bioretention Media Depth: 1.5 feet
Gravel Layer Depth: 2.5 feet
Infiltration Rate: 0.24 in/hr
No underdrains are required as the soil type is conducive to infiltration. The initial lengths and
corresponding footprints for each bioretention IMP are calculated by assuming a bioretention to
impervious area sizing ratio of 0.06 (or 6%) based the impervious DMA from the cul-de-sac
roadway and an assumed amount of runoff from the permeable pavement IMP during larger storms.
The results of the pre-project and mitigated (post-project) scenarios model runs are shown in
Figure 8. The mitigated scenario does not exceed the pre-project flow conditions and the project as
proposed will meet requirements for hydromodification.
Figure 7: BAHM2023 Results from Residential Example Option B
APPENDIX H 9th Edition — APRIL 12, 2024 H-9
The total required bioretention IMP size is 1,182 sf or roughly 24% of the bioretention IMP
footprint required in Option A. Option B demonstrates how the incorporated of IMP such as self-
retaining landscape into the design of the development can dramatically decrease the footprint
dedicated exclusively to stormwater management.
COMMERCIAL EXAMPLE
A new office building for the Contra Costa County Fire Prevention Bureau is proposed on an L-
shaped 1.09-acre site at the corner of Loveridge Road and Loveridge Circle in Pittsburg, California.
The existing site consists of an unpaved dirt and gravel lot with HSG Type D soils with an
infiltration rate of 0.05 inches per hour as demonstrated in onsite testing. The lot is flat with slopes
of less than 2% in variable directions. The proposed project consists of a 7,000-square-foot single-
story building with paved parking lot and a small outbuilding. The site can be broken into eight
distinct drainage areas (or basins) based on the proposed slopes and final grades. The initial
breakdown of roof, on-grade pavement, and landscape area without any IMP for stormwater
management is presented in
Table 2. The project is subject to both the treatment and hydromodification requirements of the
MRP Section C.3.
Figure 8: Commercial Example Layout
APPENDIX H 9th Edition — APRIL 12, 2024 H-10
Table 1: Commercial Example Land Use Types without IMP
Basin Roof Area Pavement Area Pervious Area
(sf) (ac) (sf) (ac) (sf) (ac)
A1 4,000 0.092 230 0.005 2,124 0.049
A2 4,375 0.100 7,684 0.176 3,289 0.076
A3 0 0 1,064 0.024 0 0
A4 0 0 715 0.016 0 0
A5 0 0 2,270 0.052 344 0.008
A6 220 0.005 2,932 0.067 970 0.022
A7 0 0 0 0 12,767 0.293
A8 0 0 3,127 0.072 1,369 0.031
TOTAL 8,595 0.197 18,022 0.414 20,863 0.479
The pre-project BAHM scenario consists of a single basin [DMA] containing the full project site
with the characteristics described above: 1.09 acres of pervious area (C/D, Urban, Flat 0-5%).
Bioretention IMP is proposed for the majority of the project area. The mitigated [post-project]
scenario is entered into BAHM2023 as seven different basins [DMAs] and one trapezoidal pond that
encapsulates the self-retaining area A7. The acreage of impervious areas for roof (Roof Area),
sidewalk (Sidewalk, Flat, 0-5%) and pavement (Parking, Flat, 0-5%) as well as pervious landscaped
areas (C/D, Grass, 0-5%) is entered for each basin.
The project intends to use bioretention IMP to meet the hydromodification requirements of the
MRP as detailed in the CCCWP C.3 Guidebook. Each of the proposed bioretention IMP will have
vertical walls and an underdrain due to the low-infiltrating soils. The design begins with initial sizing
ratio of 0.05 (5%) bioretention IMP footprint to impervious area. The footprint for the bioretention
IMP will come from the pervious area for those drainage areas with proposed pervious coverage and
from pavement for those areas without proposed pervious. Area A7 is entirely pervious and
considered to be self-retaining. Area A8 is situated such that capture and treatment is not feasible so
no IMP is proposed. Table 3 includes the land use breakdown for the initial IMP sizing ratio of 0.05
while Figure 10 shows the mitigated scenario configuration as described.
Table 2: Commercial Example Land Use Types with IMP Sizing Ratio of 0.05 per Basin
Basin Roof Area Pavement Area Pervious Area IMP Footprint
(sf) (ac) (sf) (ac) (sf) (ac) (sf) (% Imp.)
A1 4,000 0.092 230 0.005 1,913 0.044 212 5.0%
A2 4,375 0.100 7,684 0.176 2,686 0.062 603 5.0%
A3 0 0 1,011 0.023 0 0 53 5.0%
A4 0 0 679 0.016 0 0 36 5.3%
A5 0 0 2,270 0.052 231 0.005 114 5.3%
A6 220 0.005 2,932 0.067 812 0.019 158 5.0%
A7 0 0 0 0 0 0 12,767 100.0%
A8 0 0 3,127 0.072 1,369 0.031 n/a 0.0%
TOTAL 8,595 0.197 17,933 0.412 7,010 0.161 1,175* 4.4%*
* Total, site-wide IMP footprint and IMP to impervious DMA ratio does not include the self-retaining area
APPENDIX H 9th Edition — APRIL 12, 2024 H-11
Figure 9: Mitigated Scenario Configuration in BAHM2023 for Commercial Example
The bioretention IMP all have the same properties but with slightly different footprints due to
varying impervious DMAs. The bioretention IMP are assumed to be 6-foot-wide planters with
vertical concrete walls and have the following properties:
Width: 6 feet
Length: Variable
Freeboard: 0.5 feet
Ponding Depth: 0.5 foot
Bioretention Media Depth: 1.5 feet
Gravel Layer Depth: 2.0 feet
Infiltration Rate: 0.05 in/hr
Underdrain / Orifice Diameter: 4 inches
Underdrain Offset: 18 inches
The self-retaining IMP is incorporated into BAHM2023 according to the instructions for self-
retaining areas on pages 76-79 of the BAHM 2023 User Manual. The entire basin A7 area is self-
retaining and entered as a trapezoidal pond with a square area in BAHM2023 for simplicity. The
self-retaining area was assigned an impoundment depth of 0.25 feet (3 inches). The properties for
the bioretention IMP associated with Basin A1 and the self-retaining IMP of Basin A7 are shown in
Figure 11.
A1 A2 A3 A4
A5 A6
A7
A8
IMP_A1 IMP_A2 IMP_A3 IMP_A4
IMP_A5 IMP_A6
APPENDIX H 9th Edition — APRIL 12, 2024 H-12
Figure 10: Properties for Bioretention IMP for A1 and Self-Retaining IMP A7
As noted above, the initial design includes bioretention IMP at a ratio of 0.05 IMP footprint to
impervious DMA. The pre-project and mitigated (post-project) scenario flow duration curves for
the BAHM2023 model runs are shown in Figure 12. The mitigated scenario fails to match the pre-
project flow conditions for the lower flow regimes and therefore the IMPs, as initially proposed, will
not meet requirements for hydromodification. This non-compliance is likely due to the non-capture
of area A8 and the subsequent site-wide under-sizing of the bioretention IMP.
Figure 11: BAHM2023 Results for Commercial Example with IMP Sizing Ratio of 0.05 per Basin
APPENDIX H 9th Edition — APRIL 12, 2024 H-13
The size of the proposed bioretention IMP is increased to equal a site-wide IMP footprint to
impervious DMA ratio of 0.08 (8%), not including the self-retaining area. The distribution of the
increase in bioretention size is not consistent across the basins as, given the proposed programming
at the site, some basins can be configured to allow for a larger IMP footprint than others.
Table 3: Commercial Example Land Use Types with Site-Wide IMP Sizing Ratio of 0.08
Basin Roof Area Pavement Area Pervious Area IMP Footprint
(sf) (ac) (sf) (ac) (sf) (ac) (sf) (% Imp.)
A1 4,000 0.092 230 0.005 1,582 0.036 542 12.8%
A2 4,375 0.100 7,684 0.176 2,415 0.055 874 7.2%
A3 0 0 992 0.023 0 0 72 7.3%
A4 0 0 627 0.014 0 0 88 14.0%
A5 0 0 2,270 0.052 180 0.004 164 7.2%
A6 220 0.005 2,932 0.067 562 0.013 408 12.9%
A7 0 0 0 0 0 0 12,767 100.0%
A8 0 0 3,127 0.072 1,369 0.031 n/a 0.0%
TOTAL 8,595 0.197 17,862 0.410 6,108 0.140 2,148* 4.4%*
* Total, site-wide IMP footprint and IMP to impervious DMA ratio does not include the self-retaining area
The results of the pre-project and mitigated (post-project) scenario model runs are shown in Figure
13. With the increase in site-wide IMP sizing ratio, the proposed project now meets the
hydromodification requirements of the MRP.
Figure 12: BAHM2023 Results for Commercial Example with Site-Wide IMP Sizing Ratio of 0.08
9th Edition – APRIL 12, 2024
1025 ESCOBAR STREET
MARTINEZ, CA 94553CONTRA COSTA COUNTY
Legislation Details (With Text)
File #: Version:125-373 Name:
Status:Type:Consent Item Passed
File created:In control:1/2/2025 BOARD OF SUPERVISORS
On agenda:Final action:2/4/2025 2/4/2025
Title:APPROVE and AUTHORIZE the Purchasing Agent, or designee, to execute, on behalf of the Public
Works Director, a blanket purchase order with Republic Services, Inc., in an amount not to exceed
$1,000,000 for disposal services at their landfill facility, for the period of January 1, 2025 through
December 31, 2027, West County. (100% Various Funds)
Attachments:
Action ByDate Action ResultVer.Tally
approvedBOARD OF SUPERVISORS2/4/2025 1 Pass
To:Board of Supervisors
From:Warren Lai, Public Works Director/Chief Engineer
Report Title:APPROVE and AUTHORIZE the Purchasing Agent to execute a blanket purchase order with
Republic Services, Inc. for waste disposal services.
☒Recommendation of the County Administrator ☐ Recommendation of Board Committee
RECOMMENDATIONS:
APPROVE and AUTHORIZE the Purchasing Agent,or designee,to execute,on behalf of the Public Works
Director,a blanket purchase order with Republic Services,Inc.,in an amount not to exceed $1,000,000,for
disposal services at their landfill facility in West County,for the period of January 1,2025,through December
31, 2027.
FISCAL IMPACT:
Funded by Local Road, Flood Control, and General Funds. (100% Various Funds)
BACKGROUND:
The Contra Costa County (County)Public Works Maintenance Division maintains over 660 miles of roads,79
miles of creeks and channels,29 detention basins and dams,and over 150 County buildings throughout the
County.Disposal of waste material is required for ongoing routine and emergency road,flood control and
building maintenance.
Republic Services,Inc.,is a regulated and licensed solid waste landfill located in the Richmond area of the
County.There are a limited number of landfill facilities within the County and Republic Services,Inc.,is the
only facility the Public Works Department can use in West County.It is important for the Public Works
Department to have access to Republic Services,Inc.,because it allows the department to dispose of debris
when working in West County.
CONSEQUENCE OF NEGATIVE ACTION:
Failure to approve the blanket purchase order will prevent the Public Works Department from completing
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File #:25-373,Version:1
Failure to approve the blanket purchase order will prevent the Public Works Department from completing
routine and emergency road, flood control, and building maintenance in a timely manner.
CONTRA COSTA COUNTY Printed on 4/7/2025Page 2 of 2
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1025 ESCOBAR STREET
MARTINEZ, CA 94553CONTRA COSTA COUNTY
Legislation Details (With Text)
File #: Version:125-374 Name:
Status:Type:Consent Item Passed
File created:In control:1/13/2025 BOARD OF SUPERVISORS
On agenda:Final action:2/4/2025 2/4/2025
Title:APPROVE and AUTHORIZE the Public Works Director, or designee, to execute an Amendment to a
Lease between the County, as Lessee, and Sand Creek Business Associates I, LLC, as Lessor, for
approximately 14,098 square feet of medical/office space located at 171 Sand Creek Road,
Brentwood, to decrease the annual rent for the five-year period beginning September 1, 2025, from
$293,280 to $282,516; add one five-year renewal option; and clarify that Lessor is responsible for any
maintenance or repairs that result from settling/foundation issues, as requested by the Health
Services Department, and as recommended by the Public Works Director. (100% Health Services –
Enterprise Fund I)
Attachments:1. Lease Amendment 171 Sand Creek Road FINAL
Action ByDate Action ResultVer.Tally
approvedBOARD OF SUPERVISORS2/4/2025 1 Pass
To:Board of Supervisors
From:Warren Lai, Public Works Director/Chief Engineer
Report Title:Third Amendment to Lease Agreement with Sand Creek Business Associates I, LLC.
☒Recommendation of the County Administrator ☐ Recommendation of Board Committee
RECOMMENDATIONS:
APPROVE and AUTHORIZE the Public Works Director,or designee,to execute an Amendment to a Lease
between the County,as Lessee,and Sand Creek Business Associates I,LLC,as Lessor,for approximately
14,098 square feet of medical/office space located at 171 Sand Creek Road,Brentwood,to decrease the annual
rent for the five-year period beginning September 1,2025,from $293,280 to $282,516;add one five-year
renewal option;and clarify that Lessor is responsible for any maintenance or repairs that result from
settling/foundation issues,as requested by the Health Services Department,and as recommended by the Public
Works Director.
FISCAL IMPACT:
100% Health Services - Enterprise Fund I.
BACKGROUND:
The County has leased a portion of Building 4,located at 171 Sand Creek Road,Brentwood,since 2005,for
use as medical and office space.In 2016,the premises were expanded from 10,052 square feet to the current
14,098 square feet.The proposed Amendment will decrease the rent charged for the space for the five-year
period that begins September 1,2025.The Amendment will also give the County a five-year renewal option
and clarify that the Lessor,not the County,is responsible for any costs associated with the foundation of the
building or the building settling.
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File #:25-374,Version:1
CONSEQUENCE OF NEGATIVE ACTION:
If the Amendment is not approved,rent for the five-year period beginning September 1,2025,would not be
reduced and the County could have exposure to the costs associated with repairs and maintenance that could
result from ongoing settling/foundation issues.
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1
THIRD AMENDMENT TO LEASE
Health Services Department – Brentwood Health Clinic
171 Sand Creek Road
Brentwood, California
This third amendment is dated February 4, 2025, and is between SAND CREEK
BUSINESS ASSOCIATES I, LLC, a Delaware limited liability company (the “Landlord”)
and the COUNTY OF CONTRA COSTA, a political subdivision of the State of California (the
“Tenant”).
Recitals
A. Landlord and Tenant are parties to a lease dated October 5, 2004, as
amended, under which Tenant is leasing from Landlord approximately 14,098 square
feet in the Sand Creek Business Center located at 171 Sand Creek Road, Building 4,
Units A through G (the “Lease”).
B. The parties desire to amend the Lease to (i) extend its term by adding five
years to the initial term and by modifying the renewal term, and (ii) clarify that Tenant
has no responsibility, either directly or through Additional Rent, for the cost of
maintenance or repairs that result from problems with the settlement or movement of the
Building (any such settlement or movement, “Settlement”).
The parties therefore amend the Lease as follows:
Agreement
1. All defined terms used but not defined in this third amendment have the meaning
ascribed to them elsewhere in the Lease.
2. Section 3. Term is deleted in its entirety and replaced with the following:
3. TERM
3.1 Initial Term. With respect to the Original Premises, the initial
term begins January 15, 2005, and with respect to the Expansion Premises, the
initial term begins June 16, 2016. The initial term ends August 31, 2030.
3.2 Renewal Term. The Tenant has one option to renew this Lease
for a five-year period that begins September 1, 2030, and ends August 31, 2035,
upon all the terms and conditions set forth in this Lease. Any reference in this
Lease to the “term” of the Lease will be deemed to mean the term as extended
pursuant to this Section. The Tenant shall give Landlord written notice of its
intent to renew the Lease pursuant to this Section on or before November 30,
2029.
2
3. Section 4. Rent is deleted in its entirety and replaced with the following:
4. RENT
4.1 Base Rent. The Tenant shall pay rent (“Base Rent”) to Landlord
monthly in advance beginning on the Commencement Date. Rent is payable on
the tenth day of each month during the initial term in the amounts set forth below:
A. Initial Term - Original Premises. Base Rent
January 15, 2005 through January 31, 2006 $16,586.00
February 1, 2006 through January 31, 2007 $17,084.00
February 1, 2007 through January 31, 2008 $17,596.00
February 1, 2008 through January 31, 2009 $18,124.00
February 1, 2009 through January 31, 2010 $18,667.60
February 1, 2010 through January 31, 2011 $19,414.30
February 1, 2011 through January 31, 2012 $20,190.87
February 1, 2012 through January 31, 2013 $20,998.51
February 1, 2013 through August 31, 2013 $21,838.45
September 1, 2013 through January 31, 2016 $13,870.00
February 1, 2016 through January 31, 2019 $14,675.00
February 1, 2019 through January 31, 2022 $15,580.00
February 1, 2022 through August 31, 2025 $16,485.00
Initial Term – Expansion Premises.
June 16, 2016 through January 31, 2019 $ 5,583.00
February 1, 2019 through January 31, 2022 $ 5,907.00
February 1, 2022 through August 31, 2025 $ 6,271.00
Initial Term – Premises
September 1, 2025 through August 31, 2030 $23,543.00
B. Renewal Term - Premises.
September 1, 2030 through August 31, 2035 $25,376.40
4. Section 6. Maintenance and Repair is deleted in its entirety are replaced with the
following:
6. MAINTENANCE AND REPAIRS
6.1 Tenant's Obligations. Except as otherwise specifically provided
herein and except to the extent the need for repairs is caused by Settlement,
Tenant shall, at Tenant's sole cost, keep in good and safe condition, order, and
repair, and replace when necessary, all components, portions and areas of the
Premises, including, (i) all plumbing, automatic fire extinguishing and sewage
3
systems, including water and drain lines, sinks, toilets, faucets, drains, showers
and water fountains to the extent such systems are within the Building and
exclusively serve the Premises, (ii) all interior electrical and lighting facilities,
and other operating systems, appliances, and equipment exclusively serving the
Premises or located within the Premises, (iii) all fixtures, interior walls, interior
surfaces of exterior walls, wall coverings, window coverings, carpets, floors, floor
coverings, partitioning, ceilings and ceiling tiles located in the Premises, and (iv)
all windows (including glazing), doors, entrances, plate glass and skylights
located in the Premises. Tenant shall have the benefit of all warranties available to
Landlord regarding the equipment or items in the Premises that are Tenant's
obligation to maintain. Tenant shall provide and pay for janitorial service to the
Premises. All repairs and maintenance required to be made by Tenant hereunder
are to be made promptly with new materials of like kind and quality.
Notwithstanding any other provision in this Lease to the contrary, Tenant is not
responsible for normal wear and tear in the Premises and is not required to paint
or re-carpet the Premises upon termination of the Lease. Subject to the provisions
of Section 6.4 - Perilous Conditions below, if the repair work affects the exterior
or any structural parts of the Building, or if the estimated cost of any item of
repair exceeds Two Thousand Dollars ($2,000), then Tenant shall first obtain
Landlord's written approval of the scope of work, plans for the work, materials to
be used and the contractor. Landlord's approval of the proposed work may not be
unreasonably withheld or delayed. Tenant shall promptly notify Landlord of the
need for any repairs to the HVAC System that serves the Premises so that
Landlord can make the needed repairs as required by Section 6.2-Landlord's
Obligations and Section 6.4 - Perilous Conditions, as applicable.
Notwithstanding any other provision of this Lease to the contrary, Tenant is not
responsible for making any repairs, or for reimbursing Landlord for making
repairs, that are necessitated by Settlement.
6.2 Landlord’s Obligations.
A. Building. Landlord shall maintain in good condition, order and
repair, the foundation, floor slabs, roof, structural components and exterior side of
the exterior walls of the Building and its exterior portions, including exterior
lighting, landscaping, and windows. With the exception of maintenance and
repairs that are necessitated by Settlement, all such maintenance and repair costs
and expenses are a part of Operating Expenses, as defined in Paragraph 7.
B. HVAC System. Landlord shall maintain in good condition,
order and repair all portions of the heating ventilation and air conditioning system
that exclusively serves the Premises (the "HVAC System"), including all ducts,
pipes, vents, compressors, fans, and thermostats whether located within the
Premises or outside the Premises. Tenant shall pay Tenant's Proportionate Share
of all costs and expenses incurred by Landlord in maintaining and repairing the
HVAC System.
4
C. Notice. Subject to the provisions of Section 6.4 - Perilous
Conditions, Landlord has no obligation to make repairs under subsection A. and
B. above until a reasonable time after Landlord's receipt of written notice from
Tenant of the need for such repairs.
6.3 Services by Landlord. If Tenant determines that the Premises is in
need of maintenance, construction, remodeling, janitorial, or similar service that is
beyond Landlord's responsibilities under this Lease, at Tenant's written request,
Landlord shall perform such service at Tenant's expense. In performing the
service, Landlord shall consult with Tenant and use either licensed insured
contractors or employees of Landlord. Landlord shall obtain Tenant's prior written
approval of the scope, terms, and cost of any contracts. Tenant may, by giving
Landlord 30 days prior written notice, change the level of service, terminate any
or all service, or require that a service be performed by a different contractor.
6.4 Perilous Conditions. If the Tenant's Director of Public Works
becomes aware of a perilous condition on the Premises that, in his or her opinion,
substantially and significantly threatens the health and safety of Tenant employees
and/or invitees ( a "Perilous Condition"), the Director of Public Works, or his or
her designee, will immediately notify Landlord of the Perilous Condition and
Landlord shall use best efforts to immediately eliminate the Perilous Condition.
Landlord shall immediately address any condition reasonably constituting an
emergency, whether Landlord learns of the condition through Tenant or
otherwise.
If Landlord fails to address a Perilous Condition within 24 hours after Tenant's
notice or to immediately address an emergency situation, Tenant may attempt to
resolve the Perilous Condition or emergency situation. Landlord shall reimburse
Tenant in full for any costs incurred by Tenant in addressing the Perilous
Condition or emergency situation that exceed Tenant's obligations under this
Lease, promptly upon receipt of Tenant's invoice.
5. Section 7. Operating Expenses is deleted in its entirety and replaced with the
following:
7. OPERATING EXPENSES. Tenant shall pay Tenant's
Proportionate Share of all Operating Expenses (as hereinafter defined) as may be
paid or incurred by Landlord during the term of this Lease as Additional Rent in
accordance with Paragraph 4.3. The term "Operating Expenses" means all costs
and expenses of every kind and nature paid or incurred by Landlord in protecting,
operating, maintaining, managing, repairing and preserving the Property and all
parts thereof, excluding any costs incurred as a result of Settlement, and otherwise
including:
A. All costs or expenses paid or incurred by Landlord in
maintaining, managing (including reasonable management fees not to exceed five
percent (5%) of gross receipts, operating (including janitorial services) and
5
repairing (including replacement obligations and reserves for maintenance, repairs
and replacements) the Building as required by Paragraph 6.2 or to the extent
Tenant fails to do so as required by Paragraph 6.1.
B. The cost of insurance carried by Landlord in accordance with
Paragraphs 12.4 and 12.5 hereof and, if insurance proceeds are applied to repair
covered damage, the applicable deductible.
C. The cost of all utilities, including but not limited to trash
disposal service, furnished to the Premises if not paid by Tenant directly.
D. The costs and expenses directly attributable to the Property or
membership in the Owners' Association and costs incurred in complying with all
private restrictions directly affecting the Property or directives or assessments
upon the Property by the Owner's Association, including but not limited to all
costs and expenses of every kind directly attributable to the Property as assessed
or imposed by the Owners' Association for the maintenance, repair and
replacement of the landscaping, parking areas and other amenities in the Common
Area, including such amounts as may be imposed or assessed for reserves for
future replacements and repairs. To the extent such expenses, charges and
assessments of the Owner's Association are not prorated by the Owner's
Association among the separate properties within the Center, Landlord shall
allocate such amounts in its reasonable discretion.
Notwithstanding any provision of this Lease to the contrary, Landlord and Tenant
acknowledge and agree that the following items are excluded from Operating
Expenses and other Additional Rent to be reimbursed or paid by Tenant:
i. Any maintenance and/or repairs incurred directly or proximately
by Settlement.
ii. Any costs or expenses relating to any loan, lien, or mortgage
that encumbers all or any portion of the Building or the
Property, including without limitation, any principal, interest,
amortization, fees or other payments relating thereto.
iii. Depreciation of the Building or any major systems of Building
service equipment.
iv. Depreciation of the cost of acquiring, constructing, remodeling,
refurbishing or expanding the Building or the Center or any
portion thereof, including without limitation, buildings,
improvements, common areas, and parking areas.
v. All costs and expenses associated with leasing to other tenants,
including tenant improvements allowances, attorneys' fees,
brokerage commissions, and architectural fees, if any.
6
vi. Any cost incurred in complying with hazardous materials laws,
unless compliance is required as a result of hazardous materials
introduced by Tenant.
vii. Capital taxes, income taxes, corporate taxes, corporation capital
taxes, excise taxes, profits taxes or other taxes personal to the
Landlord or the Owners' Association.
viii. Costs or expenses arising from failure by Landlord or the
Owners' Association to timely pay bills or other obligations,
including without limitation, any late charges, penalties or
interest relating thereto, except to the extent arising from default
of Tenant.
ix. Costs or expenses arising from any bad debt of Landlord or the
Owners' Association.
x. Costs or expenses arising from the breach by Landlord of this
Lease or any other lease with any other tenant or occupant of
the Building.
xi. Costs or expenses arising from the gross negligence or willful
misconduct of Landlord, the Owners' Association, or their
agents, employees or contractors, or any tenant or occupant
other than Tenant.
[Remainder of Page Intentionally Left Blank]
7
6. All other terms of the Lease remain unchanged.
Lessor and County are causing this third amendment to be executed as of the date
set forth in the introductory paragraph.
COUNTY OF CONTRA COSTA, a SAND CREEK BUSINESS
political subdivision of the State of ASSOCIATES I, LLC, a Delaware
California limited liability company
By: The Paul and Dorothy Wachter
Living Trust, dated November 28,
1979, as amended May 9, 1997, and
July 30, 2002, its sole member
By: _______________________ By: _______________________
Warren Lai Paul I. Wachter, Trustee
Public Works Director
By: _______________________
Dorothy Wachter, Trustee
RECOMMENDED FOR APPROVAL:
By: _______________________
Jessica L. Dillingham
Principal Real Property Agent
By: _______________________
Margaret Eychner
Senior Real Property Agent
APPROVED AS TO FORM
THOMAS L. GEIGER, COUNTY COUNSEL
By: _______________________
Kathleen M. Andrus
Deputy County Counsel
ME:
WLP541
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Amendment\171 Sand Creek - Third Amendment - V4.Docx
1025 ESCOBAR STREET
MARTINEZ, CA 94553CONTRA COSTA COUNTY
Legislation Details (With Text)
File #: Version:125-375 Name:
Status:Type:Consent Item Passed
File created:In control:1/13/2025 BOARD OF SUPERVISORS
On agenda:Final action:2/4/2025 2/4/2025
Title:APPROVE and AUTHORIZE the Public Works Director, or designee, to submit two grant applications
to the United States Department of Transportation Promoting Resilient Operations for Transformative,
Efficient, and Cost-Saving Transportation (PROTECT) grant program for fiscal year 2024/2025 for the
San Pablo Dam Road Rehabilitation and Pinehurst Road Slope Failures and Erosion Repair projects,
El Sobrante and Canyon areas. (80% PROTECT Grant Funds, 20% Local Road Funds)
Attachments:
Action ByDate Action ResultVer.Tally
approvedBOARD OF SUPERVISORS2/4/2025 1 Pass
To:Board of Supervisors
From:Warren Lai, Public Works Director/Chief Engineer
Report Title:Grant applications for the Promoting Resilient Operations for Transformative,Efficient,and
Cost-Saving Transportation (PROTECT)grant program for fiscal year 2024/2025,El Sobrante and Canyon
areas.
☒Recommendation of the County Administrator ☐ Recommendation of Board Committee
RECOMMENDATIONS:
APPROVE and AUTHORIZE the Public Works Director,or designee,to submit two grant applications to the
United States Department of Transportation (DOT)for the fiscal year 2024/2025 cycle of the Promoting
Resilient Operations for Transformative,Efficient,and Cost-Saving Transportation (PROTECT)grant program
for the San Pablo Dam Road Rehabilitation and Pinehurst Road Slope Failures and Erosion Repair projects,El
Sobrante and Canyon areas. (Districts I and II)
FISCAL IMPACT:
The costs for the San Pablo Dam Road and Pinehurst Road projects are estimated to be $17.5 million and $15
million,respectively.Both require a local match of approximately 20%.(80%Promoting Resilient Operations
for Transformative, Efficient, and Cost-Saving Transportation Funds and 20% Local Road Funds).
BACKGROUND:
On October 25,2024,the DOT issued the Notice of Funding Opportunity (NOFO)for the PROTECT grant
program under the Infrastructure Investment and Jobs Act (also referred to as the “Bipartisan Infrastructure
Law”or “BIL”).In the notice,the DOT solicits applications to plan and strengthen surface transportation to be
more resilient to natural hazards,including climate change,sea level rise,heat waves,flooding,extreme
weather events, and other natural disasters. Applications must be submitted by February 24, 2025.
The DOT has authorized and appropriated $876 million to be awarded as part of the PROTECT program across
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The DOT has authorized and appropriated $876 million to be awarded as part of the PROTECT program across
two application periods,fiscal years 2024/2025 and 2025/2026.The grant program categorizes applications as
either:(a)Planning Grants to develop Resilience Improvement Plans;(b)Resilience Improvement Grants to
improve the ability of an existing surface transportation asset to withstand one or more elements of a weather
event or natural disaster;or to increase the resilience of surface transportation infrastructure from the impacts of
changing conditions;(c)Community Resilience and Evacuation Route Grants to strengthen and protect
evacuation routes that are essential for providing and supporting evacuations caused by emergency events;and
(d)At-Risk Coastal Infrastructure Grants to strengthen,stabilize,harden,elevate,relocate,or otherwise
enhance the resilience of highway and non-rail infrastructure that are subject to,or face increased long-term
future risks of,a weather event,a natural disaster or changing conditions including coastal flooding,coastal
erosion, wave action, storm surge, or sea level rise.
The DOT will evaluate applications based on eight merit criteria:(1)vulnerability and risk;(2)criticality to
community;(3)design elements;(4)public engagement,partnerships,and collaboration;(5)equity;(6)climate
change and sustainability; (7) schedule and budget; and (8) innovation.
The County intends to apply for two Resilience Grants of the PROTECT program for the San Pablo Dam Road
Rehabilitation and Pinehurst Road Slope Failures and Erosion Repair projects.
The San Pablo Dam Road Rehabilitation project will repair structural deficiencies along San Pablo Dam Road
from Tri Lane to Bear Creek Road and rehabilitate the existing pavement which is showing signs of movement
downslope along the San Pablo Reservoir (easterly)side of the road.The project will include localized
pavement repairs including milling,cold-in-place asphalt recycling,hot mix asphalt overlay,and additional
methods to restore the road.
The Pinehurst Road Slope Failures and Erosion Repair project will repair slope failures and erosion at seven
locations along Pinehurst Road in the Canyon community.The slope failures and erosion have also caused
damage to culverts, guardrails, pavement, and retaining walls.
If authorized to proceed, staff will finalize and submit the grant applications by February 24, 2025.
CONSEQUENCE OF NEGATIVE ACTION:
If the Public Works Department is not authorized to submit the applications,grant funding will not be available,
which will delay the design and construction of the projects.
c:Warren Lai, Public Works Director
Steve Kowalewski, Chief Deputy Public Works Director
Jerry Fahy, Transportation Engineering
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1025 ESCOBAR STREET
MARTINEZ, CA 94553CONTRA COSTA COUNTY
Legislation Details (With Text)
File #: Version:125-376 Name:
Status:Type:Consent Item Passed
File created:In control:1/21/2025 BOARD OF SUPERVISORS
On agenda:Final action:2/4/2025 2/4/2025
Title:APPROVE and AUTHORIZE the Public Works Director, or designee, to execute a contract with
Kilowatt Engineering, Inc., in an amount not to exceed $500,000, to provide on-call electrical
engineering services for County distributed energy resources at various County sites and facilities for
the period February 1, 2025, through July 31, 2028, Countywide. (100% General Fund)
Attachments:
Action ByDate Action ResultVer.Tally
approvedBOARD OF SUPERVISORS2/4/2025 1 Pass
To:Board of Supervisors
From:Warren Lai, Public Works Director/Chief Engineer
Report Title:Contract for Energy Planning and Management Services. Countywide
☒Recommendation of the County Administrator ☐ Recommendation of Board Committee
RECOMMENDATIONS:
APPROVE and AUTHORIZE the Public Works Director,or designee,to execute a contract with Kilowatt
Engineering,Inc.d/b/a KW Engineering,Inc.(KW Engineering),in an amount not to exceed $500,000,to
provide on-call electrical engineering services for County distributed energy resources at various County sites
and facilities for the period February 1, 2025, through July 31, 2028.
FISCAL IMPACT:
Expenditure of $500,000,100%General Fund (Measure X Sustainability Fund).Vendor services will deliver
one-time third-party financial incentives (~$50,000)and result in annual avoided utility costs (~$150,000 from
energy efficiency, ~$100,000 from solar production).
BACKGROUND:
On March 24th 2023,KW Engineering accepted the County’s award for on-call services as described in the
competitive Request for Qualifications solicitation 2211-610.KW Engineering was selected as the vendor best
suited for energy efficiency planning and evaluation and solar portfolio asset management.The Contra Costa
County 2025 Strategic Energy Management Plan (SEM Plan)calls for scaling energy efficiency
implementation and optimizing County solar production.
CONSEQUENCE OF NEGATIVE ACTION:
Without approval,energy efficiency projects will be delayed,and County clean energy solar production will not
be maximized.
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1025 ESCOBAR STREET
MARTINEZ, CA 94553CONTRA COSTA COUNTY
Legislation Details (With Text)
File #: Version:125-377 Name:
Status:Type:Consent Item Passed
File created:In control:1/21/2025 BOARD OF SUPERVISORS
On agenda:Final action:2/4/2025 2/4/2025
Title:APPROVE and AUTHORIZE the Public Works Director, or designee, to execute a contract
amendment with Bay City Boiler and Engineering Company, Incorporated, effective January 31, 2025,
to extend the term through January 31, 2027, with no change to the payment limit for on-call boiler
maintenance and repair services at various County sites and facilities, Countywide. (No fiscal impact)
Attachments:
Action ByDate Action ResultVer.Tally
approvedBOARD OF SUPERVISORS2/4/2025 1 Pass
To:Board of Supervisors
From:Warren Lai, Public Works Director/Chief Engineer
Report Title:Amendment No. 1 with Bay City Boiler and Engineering Company, Incorporated, a California
Corporation, Countywide.
☒Recommendation of the County Administrator ☐ Recommendation of Board Committee
RECOMMENDATIONS:
APPROVE and AUTHORIZE the Public Works Director,or designee,to execute a contract amendment with
Bay City Boiler and Engineering Company,Incorporated,effective January 31,2025,to extend the term
through January 31,2027,with no change to the payment limit for on-call boiler maintenance and repair
services at various County sites and facilities, Countywide.
FISCAL IMPACT:
Facilities Maintenance Budget. (No fiscal impact)
BACKGROUND:
The Public Works Department,Facilities Services is responsible for the maintenance and repairs to all hot
water,boiler furnace,and heat pump systems which provide hot water and heating to County buildings.
Government Code Section 25358 authorizes the County to contract for maintenance and upkeep of County
facilities.Scheduling this maintenance is done by Facilities Services,but the actual maintenance is performed
by outside vendors.
The Public Works Department conducted a formal solicitation for on-call boiler maintenance and repair
services.All bids were collected via BidSync #2107-497 and Bay City Boiler and Engineering Company,
Incorporated,was one of two contractors awarded for this work.On January 18,2022,the Board approved a
contract with Bay City Boiler and Engineering Company,Incorporated,in an amount not to exceed $750,000,
for the period February 1, 2022 through January 31, 2025.
Facilities Services is requesting Amendment No.1 to be approved,extending the contract term an additional
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Facilities Services is requesting Amendment No.1 to be approved,extending the contract term an additional
two years through January 31, 2027, with no change to the payment limit.
CONSEQUENCE OF NEGATIVE ACTION:
If this contract amendment is not approved,boiler services with Bay City Boiler and Engineering Company,
Incorporated,will be discontinued,and future boiler maintenance and repair projects may not be completed
timely.
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1025 ESCOBAR STREET
MARTINEZ, CA 94553CONTRA COSTA COUNTY
Legislation Details (With Text)
File #: Version:125-378 Name:
Status:Type:Consent Item Passed
File created:In control:1/21/2025 BOARD OF SUPERVISORS
On agenda:Final action:2/4/2025 2/4/2025
Title:APPROVE and AUTHORIZE the Public Works Director, or designee, to execute a contract
amendment with Silicon Valley Fire, Inc., effective January 31, 2025, to extend the term through
January 31, 2027, with no change to the payment limit for on-call fire extinguisher services at various
County sites and facilities, Countywide. (No fiscal impact)
Attachments:
Action ByDate Action ResultVer.Tally
approvedBOARD OF SUPERVISORS2/4/2025 1 Pass
To:Board of Supervisors
From:Warren Lai, Public Works Director/Chief Engineer
Report Title:Amendment No. 1 with Silicon Valley Fire, Inc., a California Corporation, Countywide.
☒Recommendation of the County Administrator ☐ Recommendation of Board Committee
RECOMMENDATIONS:
APPROVE and AUTHORIZE the Public Works Director,or designee,to execute a contract amendment with
Silicon Valley Fire,Inc.,effective January 31,2025,to extend the term through January 31,2027,with no
change to the payment limit for on-call fire extinguisher services at various County sites and facilities,
Countywide.
FISCAL IMPACT:
Facilities Maintenance Budget. (No fiscal impact)
BACKGROUND:
The Public Works Department,Fleet and Facilities Services are responsible for fire extinguisher and fire
suppression system certification and repairs in County buildings and vehicles.By law,fire extinguishers must
be inspected and certified annually.Fire suppression contractors also provide repair services and replacement
extinguishers.
Government Code Section 25358 authorizes the County to contract for maintenance and upkeep of County
facilities.The Public Works Department conducted a formal solicitation for on-call fire extinguisher
certification and repair services.The Request for Proposal was originally bid on BidSync #2107-492 and
Silicon Valley Fire,Inc.,was the lowest,responsive and responsible bidder.On January 18,2022,the Board
approved a contract with Silicon Valley Fire,Inc.,in an amount not to exceed $600,000,for the period February
1, 2022 through January 31, 2025.
Facilities Services is requesting Amendment No.1 to be approved,extending the contract term an additional
two years through January 31,2027,with no change to the payment limit.This amendment will also update the
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two years through January 31,2027,with no change to the payment limit.This amendment will also update the
contractor’s address with the most updated information.
CONSEQUENCE OF NEGATIVE ACTION:
If this contract amendment is not approved, fire extinguisher services with Silicon Valley Fire, Inc. will be
discontinued, and future fire extinguisher inspections may not be completed timely.
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1025 ESCOBAR STREET
MARTINEZ, CA 94553CONTRA COSTA COUNTY
Legislation Details (With Text)
File #: Version:125-379 Name:
Status:Type:Consent Item Passed
File created:In control:1/15/2025 BOARD OF SUPERVISORS
On agenda:Final action:2/4/2025 2/4/2025
Title:APPROVE the Vasco Road Safety Improvements Project and AUTHORIZE the Public Works Director,
or designee, to advertise the Project, Byron area. (76% Highway Safety Improvement Program Funds,
24% Local Road Funds)
Attachments:1. CEQA Notice of Exemption
Action ByDate Action ResultVer.Tally
approvedBOARD OF SUPERVISORS2/4/2025 1 Pass
To:Board of Supervisors
From:Warren Lai, Public Works Director/Chief Engineer
Report Title:APPROVE the Vasco Road Safety Improvements Project and take related actions under CEQA
☒Recommendation of the County Administrator ☐ Recommendation of Board Committee
RECOMMENDATIONS:
APPROVE the Vasco Road Safety Improvements Project (Project)and AUTHORIZE the Public Works
Director,or designee,to advertise the Project,Byron area.[County Project No.0662-6R4100,DCD-CP#23-
31] (District III).
DETERMINE the Project is a California Environmental Quality Act (CEQA),Categorical Exemption,pursuant
to Article 19, Section 15301(c) of the CEQA Statute and Guidelines, and
DIRECT the Director of Department of Conservation and Development (DCD),or designee,to file a Notice of
Exemption (NOE) with the County Clerk, and
AUTHORIZE the Public Works Director,or designee,to arrange for payment of a $25 fee to DCD for
processing, and a $50 fee to the County Clerk for filing the NOE.
FISCAL IMPACT:
Estimated Project cost: $941,000. 76% Highway Safety Improvement Program, 24% Local Road Funds.
BACKGROUND:
The purpose of this project is to improve safety and minimize passing related collisions on Vasco Road.This
project will install safety improvements which includes constructing an approximately 2.25-mile-long no-
passing zone with centerline rumble strip with surface-mounted channelizers and median striping along the
Vasco Road median between Walnut Boulevard and Frisk Creek bridge.The existing center median striping
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Vasco Road median between Walnut Boulevard and Frisk Creek bridge.The existing center median striping
will be removed,and the rumble strip will be milled out using a grinding/milling machine and new striping will
be applied.The project will also install signal hardware upgrades at the intersections of Vasco Road with
Walnut Boulevard and Camino Diablo.The signal hardware will consist of new signal heads with
retroreflective borders at all traffic signals.Emergency battery backup systems for traffic signals will be added
in existing cabinets at the intersection of Vasco Road with Walnut Boulevard and Camino Diablo.The traffic
signal at the corner of Vasco Road/Walnut Boulevard intersection will be relocated further away from the road
to better accommodate turning trucks.
CONSEQUENCE OF NEGATIVE ACTION:
Delay in approving the project may result in a delay of design,construction,safety implementation,and may
jeopardize funding.
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Final.docx Revised 2018
CALIFORNIA ENVIRONMENTAL QUALITY ACT
Notice of Exemption
To: Office of Planning and Research
P.O. Box 3044, Room 113
Sacramento, CA 95812-3044
From: Contra Costa County
Department of Conservation and
Development
30 Muir Road
Martinez, CA 94553
County Clerk, County of Contra Costa
Project Title: Vasco Road Safety Improvements, Project #: WO4100, CP#: 23-31
Project Applicant: Contra Costa County Public Works Dept., 255 Glacier Drive, Martinez CA 94553
Main: (925) 313-2000, Contact: Sandeep Kajla, (925) 313-2022
Project Location: Along Vasco Road between Walnut Boulevard and the Frisk Creek Bridge
(approximately 1.35 miles south of Camino Diablo), Byron area
Lead Agency: Department of Conservation and Development, 30 Muir Road, Martinez, CA 94553
Main: (925) 655-2705, Contact: Syd Sotoodeh (925) 655-2877
Project Description: This project will install safety improvements which includes constructing an
approximately 2.25-mile-long no-passing zone with centerline rumble strip with surface-mounted
channelizers and median striping along the Vasco Road median between Walnut Boulevard and Frisk
Creek bridge. The existing center median striping will be removed, and the rumble strip will be milled out
using a grinding/milling machine and new striping will be applied. The project will also install signal
hardware upgrades at the intersections of Vasco Road with Walnut Boulevard and Camino Diablo. The
signal hardware will consist of new signal heads with retroreflective borders at all traffic signals.
Emergency battery backup systems for traffic signals will be added in existing cabinets at the intersection
of Vasco Road with Walnut Boulevard and Camino Diablo. The traffic signal at the corner of Vasco
Road/Walnut Boulevard intersection will be relocated further away from the road to better accommodate
turning trucks. The project is located in the East Contra Costa County Habitat Conservation Plan (HCP)
area and will comply with HCP requirements. Utility relocations, temporary traffic control, and vegetation
trimming and removal may be necessary. The project is anticipated to be constructed in 2025 and take
approximately 10 working days to complete. Some night work is anticipated during construction to avoid
traffic delays.
Exempt Status:
Ministerial Project (Sec. 21080[b][1]; 15268) Categorical Exemption (Sec.15301(c))
Declared Emergency (Sec. 21080[b][3]; 15269[a]) General Rule of Applicability (Sec. 15061[b][3])
Emergency Project (Sec. 21080[b][4]; 15269[b][c]) Other Statutory Exemption (Sec. )
Reasons why project is exempt: The activity consists of roadway safety improvements with no
expansion of use pursuant to Article 19, Section 15301(c) of the CEQA Guidelines.
If filed by applicant:
1. Attach certified document of exemption finding.
2. Has a Notice of Exemption been filed by the public agency approving the
project?
Yes No
Signature: Date: _____________ Title:
Contra Costa County Department of Conservation and Development
Signed by Lead Agency Signed by Applicant
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Final.docx Revised 2018
AFFIDAVIT OF FILING AND POSTING
I declare that on I received and posted this notice as required by
California Public Resources Code Section 21152(c). Said notice will remain posted for 30
days from the filing date.
Signature Title
Applicant Department of Fish and Wildlife Fees Due
Public Works Department De Minimis Finding - $0
255 Glacier Drive County Clerk - $50
Martinez, CA 94553 Conservation and Development - $25
Attn: Sandeep Kajla
Environmental Services Division
Phone: (925) 313-2022
Total Due: $75 Receipt #:
1025 ESCOBAR STREET
MARTINEZ, CA 94553CONTRA COSTA COUNTY
Legislation Details (With Text)
File #: Version:125-380 Name:
Status:Type:Consent Item Passed
File created:In control:1/15/2025 BOARD OF SUPERVISORS
On agenda:Final action:2/4/2025 2/4/2025
Title:APPROVE the Treat Boulevard Corridor Improvements Project and AUTHORIZE the Public Works
Director, or designee, to advertise the Project, Walnut Creek area. (23% State Transportation
Improvement Program Grant Funds, 46% Local Road Funds, 14% City of Walnut Creek, 10% Former
Redevelopment Agency, 7% Central County Area of Benefit)
Attachments:1. CEQA Notice of Exemption
Action ByDate Action ResultVer.Tally
approvedBOARD OF SUPERVISORS2/4/2025 1 Pass
To:Board of Supervisors
From:Warren Lai, Public Works Director/Chief Engineer
Report Title:APPROVE the Treat Boulevard Corridor Improvements Project and take related actions under
CEQA.
☒Recommendation of the County Administrator ☐ Recommendation of Board Committee
RECOMMENDATIONS:
APPROVE the Treat Boulevard Corridor Improvements Project (Project),and AUTHORIZE the Public Works
Director,or designee,to advertise the Project,Walnut Creek area.[County Project No.0662-6R4089,DCD-
CP#19-27] (District IV), and
DETERMINE the Project is a California Environmental Quality Act (CEQA)Categorical Exemption,pursuant
to Article 19, Section 15301 Class 1(c) and Section 15304 Class 4(h) of the CEQA Guidelines, and
DIRECT the Director of Conservation and Development (DCD),or designee,to file a Notice of Exemption
(NOE) with the County Clerk, and
AUTHORIZE the Public Works Director,or designee,to arrange for payment of a $25 fee to DCD for
processing, and a $50 fee to the County Clerk for filing the NOE.
FISCAL IMPACT:
Estimated Project cost:$6,900,000.(23%State Transportation Improvement Program Grant,46%Local Road
Funds, 14% City of Walnut Creek, 10% Former Redevelopment Agency, 7% Central County Area of Benefit).
BACKGROUND:
The purpose of this Project is to improve the safety and connectivity for pedestrians and bicyclists along Treat
CONTRA COSTA COUNTY Printed on 4/7/2025Page 1 of 2
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File #:25-380,Version:1
The purpose of this Project is to improve the safety and connectivity for pedestrians and bicyclists along Treat
Boulevard in the vicinity of the Contra Costa Centre Transit Village by constructing separated Class IV bike
lanes in both directions of Treat Boulevard between North Main Street and Jones Road,and constructing an off-
street Class I shared use path along the north side of Treat Boulevard between Buskirk Avenue and Oak Road.
Improvements include narrowing the travel lane widths,closing free right turns (slip lanes)at the intersections
of Buskirk Avenue/I-680 off-ramp,Oak Road,and Jones Road,reconstructing the refuge islands/pedestrian
passageways,improving the traffic signal hardware and timing,constructing Americans with Disabilities Act
(ADA)compliant curb ramps and crosswalk enhancements,and installing roadway striping.Additionally,the
Project will stripe buffered bike lanes and conflict striping in the northbound direction along North Main Street
between Lesnick Lane and Treat Boulevard.
CONSEQUENCE OF NEGATIVE ACTION:
This Project will not be constructed,and the County will not be consistent with the 2017 Contra Costa Centre I-
680/Treat Boulevard Bicycle and Pedestrian Plan and the 2018 Countywide Bicycle and Pedestrian Plan.
CONTRA COSTA COUNTY Printed on 4/7/2025Page 2 of 2
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Corridor Improvements.docx Revised 2018
CALIFORNIA ENVIRONMENTAL QUALITY ACT
Notice of Exemption
To: Office of Planning and Research
P.O. Box 3044, Room 113
Sacramento, CA 95812-3044
From: Contra Costa County
Department of Conservation and
Development
30 Muir Road
Martinez, CA 94553
County Clerk, County of Contra Costa
Project Title: Treat Boulevard Corridor Improvements, Project #: WO4089, CP#: 19-27
Project Location: Treat Blvd between North Main St and Jones Rd; North Main St between Lesnick Ln
and Treat Blvd, Unincorporated Contra Costa Centre and Walnut Creek, CA 94597
Lead Agency: Department of Conservation and Development, 30 Muir Road, Martinez, CA 94553
Main: (925) 655-2705, Contact: Syd Sotoodeh (925) 655-2877
Project Description:
The purpose of this project is to improve safety and connectivity for pedestrians and bicyclists along
Treat Boulevard in the Contra Costa Centre Transit Village (Transit Village). The Transit Village is a
Transit Oriented Development clustered around the Pleasant Hill Bay Area Rapid Transit (BART) station.
The project consists of bicycle and pedestrian infrastructure enhancements along the Treat Boulevard
Corridor between North Main Street and Jones Road and along North Main Street from Treat Boulevard
to Lesnick Lane. Improvements include creating buffered and non-buffered bicycle lanes and a new off-
street shared use path, enhancing existing crosswalks, and removing three free right-turn lanes.
Pedestrian and bicycle improvements include:
• From 350 feet west of North Main Street to Buskirk Avenue, the roadway will be restriped to
create buffered bicycle lanes with green markings at traffic conflict points in both directions.
• From Buskirk Avenue to Oak Road, buffered bicycle lanes will be constructed in both directions.
The buffered bike lane on the south side of Treat Boulevard will replace the outer vehicular
traffic lane. A new shared use path will be constructed on the north side of Treat Boulevard
between Buskirk Avenue and Oak Road.
• From Oak Road to Jones Road, the existing roadway will be restriped to create a non-buffered
bicycle lane with green markings at conflict points where parallel parking exists in the
westbound direction, and a buffered bicycle lane in the eastbound direction.
• From North Main Street between Lesnick Lane and Treat Boulevard, the roadway will be
restriped to create a buffered bicycle lane, with green markings at traffic conflict points, in the
northbound direction.
Crosswalk improvements will include:
• Enhancing crosswalks with high visibility striping, yield markings, and signage as appropriate.
Green ladder bike crossings will also be installed. Channelization/refuge islands will be modified
as necessary.
• Curb ramps and refuge islands will be reconstructed to meet American Disability Act standards.
Free-right turn lane modifications include:
• The free right turn from the I-680 off-ramp onto eastbound Treat Boulevard will be removed.
• The free right turn lane from westbound Treat Boulevard to Buskirk Ave will be removed.
• The free right turn lane from eastbound Treat Boulevard onto southbound Jones Road will be
removed.
• The right turn slip lane from southbound Oak Road onto westbound Treat Boulevard will be
converted to a designated bicycle path.
• The free right turn from westbound Treat Boulevard onto northbound N. Main Street will be
signalized to control right turn movements.
Project features described above may slightly be modified. Real estate transactions, utility relocations,
and temporary traffic control may be necessary. Emergency vehicles will have access at all times.
Vegetation trimming and tree removal of approximately two landscape trees may be necessary. The
maximum depth of excavation is anticipated to be approximately three feet for the project and 20 feet for
traffic signal pole relocations. Best management practices such as storm drain inlet protection will be
implemented. Construction is anticipated to start in spring 2026 and take approximately six months to
complete. Night or weekend work may be necessary and will be performed in accordance with local
guidelines.
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Corridor Improvements.docx Revised 2018
Exempt Status:
Ministerial Project (Sec. 21080[b][1]; 15268) Categorical Exemption (Sec. 15301 (c), 15304 (h))
Declared Emergency (Sec. 21080[b][3]; 15269[a]) General Rule of Applicability (Sec. 15061[b][3])
Emergency Project (Sec. 21080[b][4]; 15269[b][c]) Other Statutory Exemption (Sec. )
Reasons why project is exempt: The project is exempt pursuant to Article 19, Section 15301 (c) and
15304 (h) of the CEQA Guidelines regarding existing facilities and minor alterations to land, which
exempt existing highways and streets, sidewalks, curbs, and gutters, and the addition of bicycle facilities.
The project consists of the minor alteration of existing streets with the creation of bicycle facilities,
pedestrian crossing improvements, and removal of free right turn lanes within existing rights-of-way
involving negligible or no expansion of former use.
If filed by applicant:
1. Attach certified document of exemption finding.
2. Has a Notice of Exemption been filed by the public agency approving the
project?
Yes No
Signature: Date: _____________ Title:
Contra Costa County Department of Conservation and Development
Signed by Lead Agency Signed by Applicant
AFFIDAVIT OF FILING AND POSTING
I declare that on I received and posted this notice as required by
California Public Resources Code Section 21152(c). Said notice will remain posted for 30
days from the filing date.
Signature Title
Applicant Department of Fish and Wildlife Fees Due
Public Works Department De Minimis Finding - $0
255 Glacier Drive County Clerk - $50
Martinez, CA 94553 Conservation and Development - $25
Attn: Shravan Sundaram
Environmental Services Division
Phone: (925) 313-2366
Total Due: $75 Receipt #:
§¨¦680
N Main St
Oak Rd
Geary Rd Treat Blvd
Jones Rd
Buskirk Ave
Las Juntas Way
Wayne Ct
Parnell Ct
Sunnyvale Ave
Cherry Ln
Honey Trl
Del Hombre Ln
Roble Rd
Brockhurst Ct
Oak Rd
Walnut Creek
Walnut Creek
Map created 11/3/2011by Contra Costa County Department Conservation and Development Community Development Division--GIS Group651 Pine Street, 4th Floor North Wing, Martinez, CA 94553-009537:59:48.455N 122:06:35.384WThis map contains copyrighted information and may not be altered. It may be reproduced in its current state if the source is cited. Users of this map agree to read and accept the County of Contra Costa disclaimer of liability for geographic information.I 0 325 650162.5 Feet
Project Vicinity Map
Legend
BART Stations
BART Track
Parcels
Project Area
Walnut Creek City Limits
Walnut Creek
Pleasant Hill Concord
Lafayette
Martinez
Lafayette
§¨¦680
Taylor Blvd
N Main St Treat Blvd
Geary Rd
Oak Park Blvd
Gregory Ln
Treat Blvd
Vicinity Map
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Contra Costa County
Public Works Department
255 Glacier Drive Martinez, CA 94553
PH: (925) 313-2000 FAX: (925) 313-2333
SCALE:
1" = 200'
PROJECT AREA MAP
TREAT BOULEVARD CORRIDOR IMPROVEMENTS
CONTRA COSTA CENTRE, CONTRA COSTA COUNTY
DRAWN BY: JL
CHECKED BY: JS SHEET: 1 OF 1
DATE: DEC 2023
ATT - TREAT BLVD MAP.DWG CAD FILE:
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Health
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Regional Office
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Farmers
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Apollo
Veterinary
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Shared Use Path
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1025 ESCOBAR STREET
MARTINEZ, CA 94553CONTRA COSTA COUNTY
Legislation Details (With Text)
File #: Version:125-381 Name:
Status:Type:Consent Item Passed
File created:In control:1/21/2025 BOARD OF SUPERVISORS
On agenda:Final action:2/4/2025 2/4/2025
Title:APPROVE the Pacifica Avenue Safe Routes to School Project and AUTHORIZE the Public Works
Director, or designee, to advertise the Project, Bay Point area. (80% Active Transportation Program
Funds, 20% Local Road Funds)
Attachments:1. CEQA Notice of Exemption
Action ByDate Action ResultVer.Tally
approvedBOARD OF SUPERVISORS2/4/2025 1 Pass
To:Board of Supervisors
From:Warren Lai, Public Works Director/Chief Engineer
Report Title:APPROVE the Pacifica Avenue Safe Routes to School Project and take related actions under
CEQA
☒Recommendation of the County Administrator ☐ Recommendation of Board Committee
RECOMMENDATIONS:
APPROVE the Pacifica Avenue Safe Routes to School Project (Project),and AUTHORIZE the Public Works
Director,or designee,to advertise the Project,Bay Point area.[County Project No.0662-6R4164,DCD-CP#23
-32] (District V).
DETERMINE the Project is a California Environmental Quality Act (CEQA),Categorical Exemption,pursuant
to Article 19, Section 15301(c) of the CEQA Statute and Guidelines, and
DIRECT the Director of Department of Conservation and Development (DCD),or designee,to file a Notice of
Exemption (NOE) with the County Clerk, and
AUTHORIZE the Public Works Director,or designee,to arrange for payment of a $25 fee to DCD for
processing, and a $50 fee to the County Clerk for filing the NOE.
FISCAL IMPACT:
Estimated Project cost:$4,842,000.(80 %Active Transportation Program State Funds,20%Local Road
Funds).
BACKGROUND:
The purpose of this Project is to improve the multi-modal transportation network on Pacifica Avenue and
increase roadway safety for active modes of transportation,including walking,and biking.The Project will
CONTRA COSTA COUNTY Printed on 4/7/2025Page 1 of 2
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File #:25-381,Version:1
increase roadway safety for active modes of transportation,including walking,and biking.The Project will
construct approximately 2,400 feet of a Class IV two-way buffered bikeway,400 feet of new sidewalk,500 feet
of widened sidewalk,bulb-outs,and three raised crosswalks.The Project will remove portions of the existing
sidewalk and asphalt walking path and replace with a new Americans with Disabilities Act (ADA)compliant
sidewalk.One bus stop will be relocated to the west side of Inlet Drive,and another bus stop will be replaced
with a bus platform on the east side of Breaker Drive.Pacifica Avenue will be restriped to narrow the existing
travel lanes and install bike lanes on the south side of the existing road.
CONSEQUENCE OF NEGATIVE ACTION:
Delay in approving the project may result in a delay of design, construction, and may jeopardize funding.
CONTRA COSTA COUNTY Printed on 4/7/2025Page 2 of 2
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Final.docx Revised 2018
CALIFORNIA ENVIRONMENTAL QUALITY ACT
Notice of Exemption
To: Office of Planning and Research
P.O. Box 3044, Room 113
Sacramento, CA 95812-3044
From: Contra Costa County
Department of Conservation and
Development
30 Muir Road
Martinez, CA 94553
County Clerk, County of Contra Costa
Project Title: Pacifica Avenue Safe Routes to School, Project #: WO4164, CP#: 23-32
Project Applicant: Contra Costa County Public Works Dept., 255 Glacier Drive, Martinez CA
94553 Main: (925) 313-2000, Contact: Sandeep Kajla, (925) 313-2022
Project Location: Along Pacifica Avenue from Wharf Drive to Port Chicago Highway in unincorporated
Bay Point, Contra Costa County.
Lead Agency: Department of Conservation and Development, 30 Muir Road, Martinez, CA 94553
Main: (925) 655-2705, Contact: Syd Sotoodeh (925) 655-2877
Project Description: The purpose of the project is to improve the multi-modal transportation network on
Pacifica Avenue and increase roadway safety for active modes of transportation, including walking, and
biking. The project will construct approximately 2,400 feet of a Class IV two-way buffered bikeway, 400
feet of new sidewalk, 500 feet of widened sidewalk, bulb-outs, and three raised crosswalks. The project
will remove portions of the existing sidewalk and asphalt walking path and replace with a new Americans
with Disabilities Act (ADA) compliant sidewalk. A 250 foot long, up to 3-foot tall, retaining wall or curb
may be installed on the south side of Pacifica Avenue just east of A Street to allow for proper construction
of the widened sidewalk. The project will maintain existing street drainage and existing storm drains and
inlets may be replaced where new sidewalk is installed. This project will eliminate street parking on
portions of Pacifica Avenue. One bus stop will be relocated to the west side of Inlet Drive, and another
bus stop will be replaced with a bus platform on the east side of Breaker Drive. Pacifica Avenue will be
restriped to narrow the existing travel lanes and install bike lanes on the south side of the existing road.
Excavations up to 6 feet are anticipated for storm drain inlet replacements. Project construction is
anticipated to begin in summer of 2026 or 2027 and take approximately 3 months to complete. No night
work is anticipated. At least one lane will always remain open, and emergency vehicles will have access
at all times. Real Estate transactions, including right-of-way acquisition utility relocations, temporary
traffic control, and tree and vegetation trimming and removal may be necessary.
Exempt Status:
Ministerial Project (Sec. 21080[b][1]; 15268) Categorical Exemption (Sec. 15301(c))
Declared Emergency (Sec. 21080[b][3]; 15269[a]) General Rule of Applicability (Sec. 15061[b][3])
Emergency Project (Sec. 21080[b][4]; 15269[b][c]) Other Statutory Exemption (Sec. )
Reasons why project is exempt:
Yes No
Signature: Date: _____________ Title:
Contra Costa County Department of Conservation and Development
Jan. 8, 2025 Senior Planner
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Final.docx Revised 2018
AFFIDAVIT OF FILING AND POSTING
I declare that on I received and posted this notice as required by
California Public Resources Code Section 21152(c). Said notice will remain posted for 30
days from the filing date.
Signature Title
Applicant Department of Fish and Wildlife Fees Due
Public Works Department De Minimis Finding - $0
255 Glacier Drive County Clerk - $50
Martinez, CA 94553 Conservation and Development - $25
Attn: Sandeep Kajla
Environmental Services Division
Phone: (925) 313-2022
Total Due: $75 Receipt #:
SHEET OF DATE:DB: CB:
Figure 1: PROJECT LOCATION MAP
Pacifica Avenue Safe Routes to School
DP SEP 23 1 1 255 GLACIER DRIVE, MARTINEZ, CA 94553 PH: (925)313-2000 FAX: (925)313-2333
BAILEY ROAD 4
Bay Point
JS
255 GLACIER DRIVE MARTINEZ, CALIFORNIA 94553 PH: (925) 313-2000 FAX: (925) 313-2333
Figure 2: PROJECT VICINITY MAP - CONTRA COSTA COUNTY
Pacifica Avenue Safe Routes to School
FEDERAL ID NO:DB: CB:DATE:DP SEPT 2023 1 1Page of JS
Project Begin
Project End
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1025 ESCOBAR STREET
MARTINEZ, CA 94553CONTRA COSTA COUNTY
Legislation Details (With Text)
File #: Version:125-382 Name:
Status:Type:Consent Item Passed
File created:In control:1/16/2025 BOARD OF SUPERVISORS
On agenda:Final action:2/4/2025 2/4/2025
Title:ACCEPT the Fiscal Year 2024–2025 Community Facilities District Tax Administration Report on
County of Contra Costa Community Facilities District No. 2007-1 (Stormwater Management Facilities),
as recommended by the Public Works Director, Countywide. (100% Community Facilities District No.
2007-1 Funds)
Attachments:1. 2024-25 CFD Tax Administration Report
Action ByDate Action ResultVer.Tally
approvedBOARD OF SUPERVISORS2/4/2025 1 Pass
To:Board of Supervisors
From:Warren Lai, Public Works Director/Chief Engineer
Report Title:Fiscal Year 2024-2025 Tax Administration Report for Community Facilities District No. 2007-1.
☒Recommendation of the County Administrator ☐ Recommendation of Board Committee
RECOMMENDATIONS:
ACCEPT the Fiscal Year 2024-2025 Community Facilities District (CFD)Tax Administration Report on
County of Contra Costa CFD No.2007-1 regarding Stormwater Management Facilities,as required by Sections
50075.3 and 53411 of the California Government Code,as recommended by the Public Works Director,
Countywide.
FISCAL IMPACT:
This report relates to special taxes approved by voters and payment for authorized services by said special
taxes.CFD No.2007-1 funds its own administration,including preparation of Annual CFD Tax Administration
Reports. (100% Community Facilities District No. 2007-1 Funds) Project No. 7484-6W7249
BACKGROUND:
On August 14,2007,the Contra Costa County (County)Board of Supervisors established CFD No.2007-1.In a
landowner election held the same day,the sole owner of property within the CFD voted to authorize the levy of
a Mello-Roos special tax on property within CFD No.2007-1.At CFD formation,the CFD boundary included
two parcels in the Bay Point area of the County.The future potential annexation area of CFD No.2007-1
includes all parcels in the unincorporated area of the County that will be developed or redeveloped.In Fiscal
Year 2023-24,five new development projects completed annexation into CFD No.2007-1 for a total of 63
projects that are part of this CFD.Subsequent development projects within the unincorporated areas of the
County are continuing to be annexed into CFD No. 2007-1.
The purpose of the CFD is to generate special tax revenue to fund specified Stormwater Management Facilities
CONTRA COSTA COUNTY Printed on 4/7/2025Page 1 of 2
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File #:25-382,Version:1
The purpose of the CFD is to generate special tax revenue to fund specified Stormwater Management Facilities
services provided by the County to the property owners within CFD 2007-1.The County began to provide
authorized CFD services during Fiscal Year 2009-2010.
California Government Code Sections 50075.3 and 53411 require that specified information be provided to the
Board of Supervisors on an annual basis.The reporting requirements include information on Mello-Roos CFD
Special Taxes collected and the status of any project required or authorized to be funded by the special taxes.
The attached CFD Tax Administration Report fulfills the requirement of the Government Code.Information
provided in the CFD Tax Administration Report in compliance with regulatory reporting requirements is
summarized below:
Section 50075.3
Item (a): Identify amount of special taxes that have been collected and expended.
Response to Item (a):The fiscal year 2024-2025 special tax levy was $103,868 received from 258 taxed
parcels.The total levy has been used to pay Authorized Tier 1 Services,as well as administrative costs for the
CFD.
Item (b): Identify the status of any project required or authorized to be funded by the special taxes.
Response to Item (b):The services authorized to be funded from special taxes include stormwater facilities
management services that are further described in Section VI of the CFD Tax Administration Report.These
services are ongoing.
Section 53411
Item (a):Identify the amount of bonds that have been collected and expended.
Item (b): Identify the status of any projects required or authorized to be funded from bond proceeds.
Response to Items (a)and (b):Section 53411 is not applicable to CFD No.2007-1,which did not authorize the
sale of any bonds or any projects to be funded from bond proceeds.
CONSEQUENCE OF NEGATIVE ACTION:
The County may be out of compliance with California Government Code Sections 50075.3 and 53411.
CONTRA COSTA COUNTY Printed on 4/7/2025Page 2 of 2
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COUNTY OF CONTRA COSTA
COMMUNITY FACILITIES DISTRICT NO. 2007-1
(STORMWATER MANAGEMENT FACILITIES)
CFD TAX ADMINISTRATION REPORT
FISCAL YEAR 2024-25
November 7, 2024
Community Facilities District No. 2007-1
CFD Tax Administration Report
TABLE OF CONTENTS
Section Page
Executive Summary ............................................................................................................. i
I. Introduction ..........................................................................................................................1
II. Purpose of Report ................................................................................................................2
III. Special Tax Requirement .....................................................................................................3
IV. Special Tax Levy .................................................................................................................4
V. Development Status .............................................................................................................6
VI. State Reporting Requirements .............................................................................................7
Appendix A – Summary of Fiscal Year 2024-25 Special Tax Levy
Appendix B – Fiscal Year 2024-25 Special Tax Levy for Individual Assessor’s Parcels
Appendix C – Rate and Method of Apportionment of Special Tax
Appendix D – Boundary Map of Community Facilities District No. 2007-1
Appendix E – Assessor’s Parcel Maps for Fiscal Year 2024-25
County of Contra Costa i Fiscal Year 2024-25
CFD No. 2007-1 CFD Tax Administration Report
EXECUTIVE SUMMARY
The following summary provides a brief overview of the main points from this report regarding
the County of Contra Costa Community Facilities District No. 2007-1 (Stormwater Management
Facilities) (“CFD No. 2007-1” or the “CFD”):
Fiscal Year 2024-25 Special Tax Levy
Number of Taxed Parcels Total Special Tax Levy
258 $103,868
For further detail regarding the special tax levy, or special tax rates, please refer to Section IV of
this report.
Development Status for Fiscal Year 2024-25
Type of Property Quantity
Agricultural Property 1 parcel
Single Family Property 129 parcels
Multi-Family Property 621 units
Other Property 25 parcels
2,695,967 Impervious Sq. Ft.
For more information regarding the status of development in CFD No. 2007-1, please see
Section V of this report.
County of Contra Costa 1 Fiscal Year 2024-25
CFD No. 2007-1 CFD Tax Administration Report
I. INTRODUCTION
Community Facilities District No. 2007-1
On August 14, 2007, the County of Contra Costa (the “County”) Board of Supervisors
established CFD No. 2007-1. In a landowner election held on the same day, the sole owner of
property within the CFD voted to authorize the levy of a Mello-Roos special tax on property
within CFD No. 2007-1. Special tax revenue will fund stormwater management facilities
services for the property owners of CFD No. 2007-1 as well as for property owners of territories
to be annexed to the CFD in the future.
At CFD formation, the CFD boundary included only two parcels located in the north-central part
of the County. The future annexation area of CFD No. 2007-1 includes all parcels in the
unincorporated portion of the County. It is anticipated that new development in the
unincorporated areas of the County will annex into CFD No. 2007-1.
The Mello-Roos Community Facilities Act of 1982
The California State Legislature (the “Legislature”) approved the Mello-Roos Community
Facilities Act of 1982 that provides for the levy of a special tax within a defined geographic area
(i.e., a community facilities district), if such a levy is approved by two-thirds of the qualified
electors in the area. Community facilities districts can generate funding for a broad range of
facilities and eligible services. These services include police protection services, fire protection
and suppression services, library services, recreation program services, maintenance of parks,
parkways and open space, flood and storm protection services, and road maintenance and street
lighting services. Special taxes can be allocated to property in any reasonable manner other than
on an ad valorem basis.
County of Contra Costa 2 Fiscal Year 2024-25
CFD No. 2007-1 CFD Tax Administration Report
II. PURPOSE OF REPORT
This CFD Tax Administration Report (the “Report”) presents findings from research and
financial analysis performed by Goodwin Consulting Group, Inc. to determine the fiscal year
2024-25 special tax levy for CFD No. 2007-1. The Report is intended to provide information to
interested parties regarding the current financial obligations of the CFD and special taxes levied
in fiscal year 2024-25.
The remainder of the Report is organized as follows:
• Section III identifies the financial obligations of the CFD for fiscal year 2024-25.
• Section IV provides a summary of the special tax categories and the methodology that is
used to apportion the special tax among parcels in the CFD.
• Section V provides an update of the development activity occurring within the CFD,
including new building permit activity.
• Section VI provides information on state reporting requirements.
County of Contra Costa 3 Fiscal Year 2024-25
CFD No. 2007-1 CFD Tax Administration Report
III. SPECIAL TAX REQUIREMENT
Pursuant to the Rate and Method of Apportionment of Special Tax (the “RMA”), which was
adopted as an exhibit to the Resolution of Formation of CFD No. 2007-1, special taxes will be
levied to pay for the Tier 1 Special Tax Requirement and Tier 2 Special Tax Requirement. The
Tier 1 Special Tax Requirement means the amount for each separate Tax Zone in CFD No.
2007-1 necessary in each fiscal year to (i) pay for Authorized Tier 1 Services, (ii) pay
administrative expenses, (iii) cure any delinquencies in the payment of Tier 1 special taxes levied
in prior fiscal years or (based on delinquencies in the payment of Tier 1 special taxes which have
already taken place) are expected to occur in the current fiscal year, and (iv) to create or
replenish reserve funds. The Tier 2 Special Tax Requirement means the amount for any
permanent stormwater management facility (“PSWMF”) Service Area within a Tax Zone in CFD
No. 2007-1 necessary in each fiscal year to (i) pay for Authorized Tier 2 Services, (ii) pay
administrative expenses that have not been included in the Tier 1 Special Tax Requirement, (iii)
cure any delinquencies in the payment of Tier 2 special taxes levied in prior fiscal years or
(based on delinquencies in the payment of Tier 2 special taxes which have already taken place)
are expected to occur in the current fiscal year, and (iv) to create or replenish reserve funds.
For fiscal year 2024-25, the Tier 2 Special Tax Requirement is $0. The combined fiscal year
2024-25 Tier 1 Special Tax Requirement for all Tax Zones is $103,868, as shown in the table
below.
Community Facilities District No. 2007-1
Combined Tier 1 Special Tax Requirement for Fiscal Year 2024-25
All Tax Zones
Authorized Tier 1 Services (1) $94,426
Reserve Fund $9,443
Fiscal Year 2024-25 Tier 1 Special Tax Requirement (2) $103,868
(1) Includes costs associated with the administration of the CFD.
(2) Total may not sum due to rounding.
County of Contra Costa 4 Fiscal Year 2024-25
CFD No. 2007-1 CFD Tax Administration Report
IV. SPECIAL TAX LEVY
Special Tax Categories
Special taxes within CFD No. 2007-1 are levied pursuant to the methodology set forth in the
RMA. The RMA establishes various special tax categories against which the special tax can be
levied, the maximum special tax rates, and the methodology by which the special tax is applied.
Each Fiscal Year, the Administrator shall identify the current Assessor’s Parcel numbers for all
Parcels of Developed Property within CFD No. 2007-1 and shall determine within which Tax
Zone each Assessor’s Parcel is located. Upon each annexation of property into CFD No. 2007-1,
the Administrator shall update Attachment 2 of the RMA to include each new Parcel that is
annexed into an existing Tax Zone or, if a new Tax Zone is created, each new Tax Zone and the
Assessor’s Parcel(s) included in the Tax Zone. If a new Tax Zone is created, the Administrator
shall update Attachment 1 of the RMA to include the Maximum Special Taxes for that Tax
Zone. The Administrator shall also determine: (i) whether each Assessor’s Parcel of Developed
Property is Agricultural Property, Single Family Property, Multi-Family Property, or Other
Property, (ii) for Parcels of Agricultural Property and Single Family Property, the Parcel Square
Footage of each Parcel, (ii) for Parcels of Multi-Family Property, the number of Units, the total
square footage of each Parcel, and the Unit Square Footage of each Unit, and (iii) for Other
Property, the Impervious Square Footage of each Parcel. For Multi-Family Property, the number
of Units shall be determined by referencing the development plan for the property or other
County development records. Finally, the Administrator shall also determine the Tier 1 Special
Tax Requirement for each Tax Zone. (Capitalized terms are defined in the RMA in Appendix C
of this Report.)
Maximum Special Tax Rates
Each Tax Zone has its own set of maximum special tax rates applicable to each category of
property in CFD No. 2007-1. As of the date of this Report, there are two Tax Zones in the CFD.
The maximum special tax rates applicable to each category of property in CFD No. 2007-1 are
set forth in Section C of the RMA. The tables in Appendix A identify the fiscal year 2024-25
maximum special tax rates and actual special tax rates for taxable property in CFD No. 2007-1.
Apportionment of Special Taxes
The amount of special tax levied on each parcel in the CFD each fiscal year will be determ ined
by application of Section D of the RMA. Pursuant to this section, the Tier 1 Special Tax
Requirement will be allocated as follows:
For each Tax Zone, the Tier 1 Special Tax will be levied until the amount of the levy equals the
Tier 1 Special Tax Requirement. The first step requires the Tier 1 Special Taxes to be levied
proportionately on each parcel of Developed Property that is not Taxable Public Property up to
100% of Maximum Tier 1 Special Tax for that Tax Zone, until the amount levied is equal to the
Tier 1 Special Tax Requirement for the Tax Zone. If additional revenue is needed after the first
step is completed, then the Tier 1 Special Tax will be levied proportionately on each parcel of
County of Contra Costa 5 Fiscal Year 2024-25
CFD No. 2007-1 CFD Tax Administration Report
Taxable Public Property up to 100% of the Maximum Tier 1 Special Tax that had applied to the
parcel prior to the parcel becoming Taxable Public Property, until the amount levied is equal to
the Tier 1 Special Tax Requirement for the Tax Zone. The Tier 1 Special Tax shall be collected
in the same manner and at the same time as ordinary ad valorem taxes, provided, however, that
the County may bill the Tier 1 Special Tax directly, collect it at a different time or in a different
manner.
Also pursuant to Section D of the RMA, the Tier 2 Special Tax Requirement shall be allocated as
follows:
For each PSWMF Service Area in a Tax Zone, the Tier 2 Special Tax, if applicable, will be
levied until the amount of the levy equals the Tier 2 Special Tax Requirement. The first step
requires the Tier 2 Special Taxes to be levied proportionately on each parcel of Developed
Property that is not Taxable Public Property up to 100% of Maximum Tier 2 Special Tax for that
Tax Zone, until the amount levied is equal to the Tier 2 Special Tax Requirement for the
PSWMF Service Area. If additional revenue is needed after the first step is completed, then the
Tier 2 Special Tax will be levied proportionately on each parcel of Taxable Public Property up to
100% of the Maximum Tier 2 Special Tax that had applied to the parcel prior to the parcel
becoming Taxable Public Property, until the amount levied is equal to the Tier 2 Special Tax
Requirement for the PSWMF Service Area. The Tier 2 Special Tax shall be billed directly to the
property owner(s) within a PSWMF Service Area on an as needed basis.
The special tax roll, which identifies the special tax to be levied against each parcel in the CFD
in fiscal year 2024-25, is provided in Appendix B.
County of Contra Costa 6 Fiscal Year 2024-25
CFD No. 2007-1 CFD Tax Administration Report
V. DEVELOPMENT STATUS
Based on the status of development in CFD No. 2007-1 as of May 31, 2024, the following table
summarizes the number of parcels, units, and impervious square footage for which the County
has issued building permits. These parcels and units are classified as Developed Property for the
fiscal year 2024-25 special tax levy.
Community Facilities District No. 2007-1
Allocation to Special Tax Categories
Fiscal Year 2024-25
Type of Property Quantity
Agricultural Property 1 parcel
Single Family Property 129 parcels
Multi-Family Property 621 units
Other Property 25 parcels
2,695,967 Impervious Sq. Ft.
County of Contra Costa 7 Fiscal Year 2024-25
CFD No. 2007-1 CFD Tax Administration Report
VI. STATE REPORTING REQUIREMENTS
Special Tax and Bond Accountability Report (Senate Bill No. 165)
On September 18, 2000, former Governor Gray Davis signed Senate Bill 165 which enacted the
Local Agency Special Tax and Bond Accountability Act. In approving the bill, the Legislature
declared that local agencies need to demonstrate to the voters that special taxes and bond
proceeds are being spent on the facilities and services for which they were intended. To further
this objective, the Legislature added Sections 50075.3 and 53411 to the California Government
Code setting forth annual reporting requirements relative to special taxes collected and bonds
issued by a local public agency. Pursuant to the Sections 50075.3 and 53411, the “chief fiscal
officer” of the public agency will, by January 1, 2002, and at least once a year thereafter, file a
report with the City setting forth (i) the amount of special taxes that have been collected and
expended; (ii) the status of any project required or authorized to be funded by the special taxes;
(iii) if bonds have been issued, the amount of bonds that have been collected and expended; and
(iv) if bonds have been issued, the status of any project required or authorized to be funded from
bond proceeds.
Government Code 53343.2
On July 25, 2016, Governor Jerry Brown signed Assembly Bill No. 1666, adding Section
53343.2 to the California Government Code (“GC”). The bill enhances the transparency of
community facilities districts by requiring that certain reports be accessible on a local agency’s
web site. Pursuant to Section 53343.2, a local agency that has a web site shall, within seven
months after the last day of each fiscal year of the district, display prominently on its web site the
following information:
Item (a): A copy of an annual report, if requested, pursuant to GC Section 53343.1. The report
required by Section 53343.1 includes CFD budgetary information for the prior fiscal year and is
only prepared by a community facilities district at the request of a person who resides in or owns
property in the community facilities district. If the annual report has not been requested to be
prepared, then a posting to the web site would not be necessary.
Item (b): A copy of the report provided to the California Debt and Investment Advisory
Commission (“CDIAC”) pursuant to GC Section 53359.5. Under Section 53359.5, local
agencies must provide CDIAC with the following: (i) notice of proposed sale of bonds; (ii)
annual reports on the fiscal status of bonded districts; and (iii) notice of any failure to pay debt
service on bonds, or of any draw on a reserve fund to pay debt service on bonds.
Item (c): A copy of the report provided to the State Controller’s Office pursuant to GC Section
12463.2. This section refers to the parcel tax portion of a local agency’s Financial Transactions
Report that is prepared for the State Controller’s Office annually. Note that school districts are
not subject to the reporting required by GC Section 12463.2.
County of Contra Costa 8 Fiscal Year 2024-25
CFD No. 2007-1 CFD Tax Administration Report
Government Code 65940.1
On October 9, 2019, Governor Gavin Newsom signed Assembly Bill No. 1483, adding Section
65940.1 to the California Government Code. The law requires that a city, county, or special
district that has an internet website, maintain on its website a current schedule of fees, exactions,
and affordability requirements imposed by the public agency on all housing development
projects. Pursuant to Section 65940.1, the definition of an exaction includes a special tax levied
pursuant to the Mello-Roos Community Facilities Act.
Assembly Bill No. 1483 defines a housing development project as consisting of (a) residential
units only; or (b) mixed-use developments consisting of residential and non-residential land uses
with at least two-thirds of the square footage designated for residential use; or (c) transitional
housing or supportive housing. Assembly Bill No. 1483 also requires a city, county, or special
district to update this information on their website within 30 days of any changes made to the
information.
APPENDIX A
Summary of Fiscal Year 2024-25
Special Tax Levy
Tax Impervious FY 2024-25
Type of Property Zone Sq. Ft.Total Special Tax
Base Incremental Base Incremental
(per parcel)(per parcel)
Agricultural Property 1 $993.88 N/A $376.58 N/A 1 parcels N/A $376.58
Single Family Property (per parcel)(per parcel)
Less than 5,000 Parcel Sq.Ft.1 $616.38 N/A $233.54 N/A 51 parcels N/A $11,910.54
5,000 to 5,999 Parcel Sq.Ft.1 $626.78 N/A $237.50 N/A 12 parcels N/A $2,850.00
6,000 to 6,999 Parcel Sq.Ft.1 $638.08 N/A $241.78 N/A 13 parcels N/A $3,143.14
7,000 to 7,999 Parcel Sq.Ft.1 $648.54 N/A $245.74 N/A 5 parcels N/A $1,228.70
8,000 to 9,999 Parcel Sq.Ft.1 $663.34 N/A $251.34 N/A 4 parcels N/A $1,005.36
10,000 to 13,999 Parcel Sq.Ft.1 $694.62 N/A $263.20 N/A 4 parcels N/A $1,052.80
14,000 to 19,999 Parcel Sq.Ft.1 $745.08 N/A $282.32 N/A 4 parcels N/A $1,129.28
20,000 to 29,999 Parcel Sq.Ft.1 $820.74 N/A $310.98 N/A 21 parcels N/A $6,530.58
30,000 to 39,999 Parcel Sq.Ft.1 $910.36 N/A $344.94 N/A 7 parcels N/A $2,414.58
Greater than or Equal to 1 $993.88 N/A $376.58 N/A 8 parcels N/A $3,012.64
40,000 Parcel Sq.Ft.
Multi-Family Property (per unit)(per unit)
Less than 2,500 Unit Sq.Ft.1 $471.44 N/A $178.64 N/A 143 units N/A $25,545.16
2,500 to 2,999 Unit Sq.Ft.1 $475.38 N/A $0.00 N/A 0 units N/A $0.00
3,000 to 3,999 Unit Sq.Ft.1 $491.98 N/A $0.00 N/A 0 units N/A $0.00
4,000 to 4,999 Unit Sq.Ft.1 $512.86 N/A $0.00 N/A 0 units N/A $0.00
5,000 to 5,999 Unit Sq.Ft.1 $534.56 N/A $0.00 N/A 0 units N/A $0.00
6,000 to 6,999 Unit Sq.Ft.1 $556.34 N/A $0.00 N/A 0 units N/A $0.00
7,000 to 7,999 Unit Sq.Ft.1 $577.22 N/A $0.00 N/A 0 units N/A $0.00
Greater than or Equal to 1 $587.68 N/A $0.00 N/A 0 units N/A $0.00
8,000 Unit Sq.Ft.
(per parcel)(per Impervious Sq.Ft.)(per parcel)(per Impervious Sq.Ft.)
Other Property 1 $484.46 $0.0352 $183.56 $0.0134 25 parcels 2,695,967 $40,580.48
(per parcel)(per parcel)
Agricultural Property 2 $35.98 N/A $0.00 N/A 0 parcels N/A $0.00
Single Family Property (per parcel)(per parcel)
Less than 5,000 Parcel Sq.Ft.2 $22.30 N/A $0.00 N/A 0 parcels N/A $0.00
5,000 to 5,999 Parcel Sq.Ft.2 $22.70 N/A $0.00 N/A 0 parcels N/A $0.00
6,000 to 6,999 Parcel Sq.Ft.2 $23.08 N/A $0.00 N/A 0 parcels N/A $0.00
7,000 to 7,999 Parcel Sq.Ft.2 $23.46 N/A $0.00 N/A 0 parcels N/A $0.00
8,000 to 9,999 Parcel Sq.Ft.2 $24.00 N/A $0.00 N/A 0 parcels N/A $0.00
10,000 to 13,999 Parcel Sq.Ft.2 $25.12 N/A $0.00 N/A 0 parcels N/A $0.00
14,000 to 19,999 Parcel Sq.Ft.2 $26.96 N/A $0.00 N/A 0 parcels N/A $0.00
20,000 to 29,999 Parcel Sq.Ft.2 $29.70 N/A $0.00 N/A 0 parcels N/A $0.00
30,000 to 39,999 Parcel Sq.Ft.2 $32.94 N/A $0.00 N/A 0 parcels N/A $0.00
Greater than or Equal to 2 $35.98 N/A $0.00 N/A 0 parcels N/A $0.00
40,000 Parcel Sq.Ft.
Multi-Family Property (per unit)(per unit)
Less than 2,500 Unit Sq.Ft.2 $17.06 N/A $6.46 N/A 478 units N/A $3,088.58
2,500 to 2,999 Unit Sq.Ft.2 $17.20 N/A $0.00 N/A 0 units N/A $0.00
3,000 to 3,999 Unit Sq.Ft.2 $17.80 N/A $0.00 N/A 0 units N/A $0.00
4,000 to 4,999 Unit Sq.Ft.2 $18.56 N/A $0.00 N/A 0 units N/A $0.00
5,000 to 5,999 Unit Sq.Ft.2 $19.34 N/A $0.00 N/A 0 units N/A $0.00
6,000 to 6,999 Unit Sq.Ft.2 $20.12 N/A $0.00 N/A 0 units N/A $0.00
7,000 to 7,999 Unit Sq.Ft.2 $20.90 N/A $0.00 N/A 0 units N/A $0.00
Greater than or Equal to 2 $21.24 N/A $0.00 N/A 0 units N/A $0.00
8,000 Unit Sq.Ft.
(per parcel)(per Impervious Sq.Ft.)(per parcel)(per Impervious Sq.Ft.)
Other Property 2 $17.52 $0.0012 $0.00 $0.0000 0 parcels 0 $0.00
Total FY 2024-25 Special Tax Levy $103,868.42
(1)Only includes the Tier 1 Special Tax. No Tier 2 Special Tax was levied in FY 2024-25.
Goodwin Consulting Group, Inc.
Maximum Special Taxes
FY 2024-25 FY 2024-25
Actual Special Taxes
Tier 1 Tier 1 Parcels/
Units
County of Contra Costa
Community Facilities District No. 2007-1
(Stormwater Management Facilities)
Special Tax Levy Summary for Fiscal Year 2024-25 (1)
APPENDIX B
Fiscal Year 2024-25 Special Tax Levy
for Individual Assessor’s Parcels
FY 2024-25 FY 2024-25
Unit Parcel Impervious Tier 1 Tier 1
Assessor's Tax Development Type of Unit Square Square Square Maximum Actual
Parcel Number Zone Status Property Count Footage Footage Footage Special Tax Special Tax
TaxRollAPN Column1 TaxRollClassAttribute1 TaxRollClassAttribute2 TaxRollClassAttribute23TaxRollClassAttribute22TaxRollClassAttribute3 TaxRollMultiplier TaxRollDirectBillColumn2
002-040-064-4 1 Undeveloped 0 12,000 $0.00 $0.00
004-010-011-7 1 Undeveloped 210,830 0 $0.00 $0.00
004-032-006-1 1 Exempt 5,227 0 $0.00 $0.00
004-032-007-9 1 Exempt 174 0 $0.00 $0.00
004-510-008-8 1 Exempt 67,954 0 $0.00 $0.00
004-510-009-6 1 Exempt 902,999 0 $0.00 $0.00
004-510-010-4 1 Exempt 108,900 0 $0.00 $0.00
004-510-011-2 1 Exempt 8,712 0 $0.00 $0.00
004-510-012-0 1 Exempt 16,117 0 $0.00 $0.00
004-510-013-8 1 Exempt 80,586 0 $0.00 $0.00
004-520-001-1 1 Undeveloped 6,600 0 $0.00 $0.00
004-520-002-9 1 Undeveloped 6,600 0 $0.00 $0.00
004-520-003-7 1 Undeveloped 6,600 0 $0.00 $0.00
004-520-004-5 1 Undeveloped 6,600 0 $0.00 $0.00
004-520-005-2 1 Undeveloped 6,600 0 $0.00 $0.00
004-520-006-0 1 Undeveloped 6,600 0 $0.00 $0.00
004-520-007-8 1 Undeveloped 6,601 0 $0.00 $0.00
004-520-008-6 1 Undeveloped 7,938 0 $0.00 $0.00
004-520-009-4 1 Undeveloped 9,300 0 $0.00 $0.00
004-520-010-2 1 Undeveloped 12,778 0 $0.00 $0.00
004-520-011-0 1 Undeveloped 6,600 0 $0.00 $0.00
004-520-012-8 1 Undeveloped 6,600 0 $0.00 $0.00
004-520-013-6 1 Undeveloped 6,600 0 $0.00 $0.00
004-520-014-4 1 Undeveloped 6,600 0 $0.00 $0.00
004-520-015-1 1 Undeveloped 6,600 0 $0.00 $0.00
004-520-016-9 1 Undeveloped 6,600 0 $0.00 $0.00
004-520-017-7 1 Undeveloped 6,605 0 $0.00 $0.00
004-520-018-5 1 Exempt 4,391 0 $0.00 $0.00
004-520-019-3 1 Undeveloped 10,548 0 $0.00 $0.00
004-520-020-1 1 Undeveloped 10,192 0 $0.00 $0.00
004-520-021-9 1 Undeveloped 7,682 0 $0.00 $0.00
004-520-022-7 1 Undeveloped 6,000 0 $0.00 $0.00
004-520-023-5 1 Undeveloped 6,000 0 $0.00 $0.00
004-520-024-3 1 Undeveloped 6,000 0 $0.00 $0.00
004-520-025-0 1 Undeveloped 6,000 0 $0.00 $0.00
004-520-026-8 1 Undeveloped 6,000 0 $0.00 $0.00
004-520-027-6 1 Undeveloped 6,000 0 $0.00 $0.00
004-520-028-4 1 Undeveloped 6,348 0 $0.00 $0.00
004-520-029-2 1 Undeveloped 6,300 0 $0.00 $0.00
004-520-030-0 1 Undeveloped 6,300 0 $0.00 $0.00
004-520-031-8 1 Undeveloped 6,300 0 $0.00 $0.00
004-520-032-6 1 Undeveloped 6,300 0 $0.00 $0.00
004-520-033-4 1 Undeveloped 6,300 0 $0.00 $0.00
004-520-034-2 1 Undeveloped 6,300 0 $0.00 $0.00
004-520-035-9 1 Undeveloped 6,300 0 $0.00 $0.00
004-520-036-7 1 Undeveloped 6,300 0 $0.00 $0.00
004-520-037-5 1 Undeveloped 6,300 0 $0.00 $0.00
004-520-038-3 1 Undeveloped 6,300 0 $0.00 $0.00
004-520-039-1 1 Undeveloped 6,300 0 $0.00 $0.00
004-520-040-9 1 Undeveloped 6,300 0 $0.00 $0.00
004-520-041-7 1 Exempt 11,484 0 $0.00 $0.00
004-520-042-5 1 Exempt 1,547 0 $0.00 $0.00
004-520-043-3 1 Exempt 17,561 0 $0.00 $0.00
004-530-001-9 1 Undeveloped 6,000 0 $0.00 $0.00
004-530-002-7 1 Undeveloped 6,000 0 $0.00 $0.00
004-530-003-5 1 Undeveloped 6,000 0 $0.00 $0.00
004-530-004-3 1 Undeveloped 6,000 0 $0.00 $0.00
004-530-005-0 1 Undeveloped 6,000 0 $0.00 $0.00
004-530-006-8 1 Undeveloped 6,300 0 $0.00 $0.00
004-530-007-6 1 Undeveloped 6,300 0 $0.00 $0.00
004-530-008-4 1 Undeveloped 6,300 0 $0.00 $0.00
004-530-009-2 1 Undeveloped 6,300 0 $0.00 $0.00
004-530-010-0 1 Undeveloped 7,396 0 $0.00 $0.00
004-530-011-8 1 Undeveloped 6,000 0 $0.00 $0.00
004-530-012-6 1 Undeveloped 6,000 0 $0.00 $0.00
004-530-013-4 1 Undeveloped 6,000 0 $0.00 $0.00
004-530-014-2 1 Undeveloped 6,000 0 $0.00 $0.00
004-530-015-9 1 Undeveloped 6,000 0 $0.00 $0.00
004-530-016-7 1 Undeveloped 6,000 0 $0.00 $0.00
004-530-017-5 1 Undeveloped 6,000 0 $0.00 $0.00
004-530-018-3 1 Undeveloped 6,979 0 $0.00 $0.00
004-530-019-1 1 Undeveloped 7,800 0 $0.00 $0.00
004-530-020-9 1 Undeveloped 6,991 0 $0.00 $0.00
004-530-021-7 1 Undeveloped 12,015 0 $0.00 $0.00
004-530-022-5 1 Undeveloped 11,528 0 $0.00 $0.00
004-530-023-3 1 Undeveloped 11,348 0 $0.00 $0.00
004-530-024-1 1 Undeveloped 6,794 0 $0.00 $0.00
004-530-025-8 1 Undeveloped 7,793 0 $0.00 $0.00
004-530-026-6 1 Undeveloped 7,674 0 $0.00 $0.00
004-530-027-4 1 Developed Single Family Property 6,596 0 $638.08 $241.78
004-530-028-2 1 Developed Single Family Property 6,000 0 $638.08 $241.78
004-530-029-0 1 Developed Single Family Property 6,000 0 $638.08 $241.78
004-530-030-8 1 Developed Single Family Property 6,000 0 $638.08 $241.78
County of Contra Costa
Community Facilities District No. 2007-1
(Stormwater Management Facilities)
Fiscal Year 2024-25 Special Tax Levy
Page 1 of 10
FY 2024-25 FY 2024-25
Unit Parcel Impervious Tier 1 Tier 1
Assessor's Tax Development Type of Unit Square Square Square Maximum Actual
Parcel Number Zone Status Property Count Footage Footage Footage Special Tax Special Tax
County of Contra Costa
Community Facilities District No. 2007-1
(Stormwater Management Facilities)
Fiscal Year 2024-25 Special Tax Levy
004-530-031-6 1 Undeveloped 6,000 0 $0.00 $0.00
004-530-032-4 1 Undeveloped 6,000 0 $0.00 $0.00
004-530-033-2 1 Undeveloped 6,000 0 $0.00 $0.00
004-530-034-0 1 Undeveloped 6,000 0 $0.00 $0.00
004-530-035-7 1 Undeveloped 7,516 0 $0.00 $0.00
004-530-036-5 1 Undeveloped 6,540 0 $0.00 $0.00
004-530-037-3 1 Undeveloped 6,540 0 $0.00 $0.00
004-530-038-1 1 Undeveloped 6,540 0 $0.00 $0.00
004-530-039-9 1 Undeveloped 6,539 0 $0.00 $0.00
004-530-040-7 1 Developed Single Family Property 6,539 0 $638.08 $241.78
004-530-041-5 1 Developed Single Family Property 6,539 0 $638.08 $241.78
004-530-042-3 1 Developed Single Family Property 6,539 0 $638.08 $241.78
004-530-043-1 1 Developed Single Family Property 6,539 0 $638.08 $241.78
004-530-044-9 1 Undeveloped 6,539 0 $0.00 $0.00
004-530-045-6 1 Undeveloped 6,539 0 $0.00 $0.00
004-530-046-4 1 Undeveloped 6,539 0 $0.00 $0.00
004-530-047-2 1 Undeveloped 6,539 0 $0.00 $0.00
004-530-048-0 1 Undeveloped 6,539 0 $0.00 $0.00
004-530-049-8 1 Undeveloped 6,539 0 $0.00 $0.00
004-530-050-6 1 Undeveloped 6,539 0 $0.00 $0.00
004-530-051-4 1 Undeveloped 6,539 0 $0.00 $0.00
004-530-052-2 1 Undeveloped 7,568 0 $0.00 $0.00
004-530-053-0 1 Exempt 9,072 0 $0.00 $0.00
004-530-054-8 1 Exempt 5,997 0 $0.00 $0.00
004-540-001-7 1 Undeveloped 7,329 0 $0.00 $0.00
004-540-002-5 1 Undeveloped 6,300 0 $0.00 $0.00
004-540-003-3 1 Undeveloped 6,300 0 $0.00 $0.00
004-540-004-1 1 Undeveloped 6,300 0 $0.00 $0.00
004-540-005-8 1 Undeveloped 6,300 0 $0.00 $0.00
004-540-006-6 1 Undeveloped 6,300 0 $0.00 $0.00
004-540-007-4 1 Undeveloped 6,300 0 $0.00 $0.00
004-540-008-2 1 Undeveloped 6,300 0 $0.00 $0.00
004-540-009-0 1 Undeveloped 6,300 0 $0.00 $0.00
004-540-010-8 1 Undeveloped 6,300 0 $0.00 $0.00
004-540-011-6 1 Undeveloped 6,300 0 $0.00 $0.00
004-540-012-4 1 Undeveloped 6,300 0 $0.00 $0.00
004-540-013-2 1 Undeveloped 6,300 0 $0.00 $0.00
004-540-014-0 1 Undeveloped 6,300 0 $0.00 $0.00
004-540-015-7 1 Undeveloped 6,300 0 $0.00 $0.00
004-540-016-5 1 Undeveloped 6,696 0 $0.00 $0.00
004-540-017-3 1 Undeveloped 6,979 0 $0.00 $0.00
004-540-018-1 1 Undeveloped 6,000 0 $0.00 $0.00
004-540-019-9 1 Undeveloped 6,000 0 $0.00 $0.00
004-540-020-7 1 Undeveloped 6,000 0 $0.00 $0.00
004-540-021-5 1 Undeveloped 6,000 0 $0.00 $0.00
004-540-022-3 1 Undeveloped 6,000 0 $0.00 $0.00
004-540-023-1 1 Undeveloped 6,000 0 $0.00 $0.00
004-540-024-9 1 Undeveloped 6,000 0 $0.00 $0.00
004-540-025-6 1 Undeveloped 6,000 0 $0.00 $0.00
004-540-026-4 1 Undeveloped 6,979 0 $0.00 $0.00
004-540-027-2 1 Undeveloped 6,979 0 $0.00 $0.00
004-540-028-0 1 Undeveloped 6,000 0 $0.00 $0.00
004-540-029-8 1 Undeveloped 6,000 0 $0.00 $0.00
004-540-030-6 1 Undeveloped 6,000 0 $0.00 $0.00
004-540-031-4 1 Undeveloped 6,000 0 $0.00 $0.00
004-540-032-2 1 Undeveloped 6,000 0 $0.00 $0.00
004-540-033-0 1 Undeveloped 6,000 0 $0.00 $0.00
004-540-034-8 1 Undeveloped 6,000 0 $0.00 $0.00
004-540-035-5 1 Undeveloped 6,000 0 $0.00 $0.00
004-540-036-3 1 Undeveloped 6,980 0 $0.00 $0.00
004-540-037-1 1 Undeveloped 6,983 0 $0.00 $0.00
004-540-038-9 1 Undeveloped 6,000 0 $0.00 $0.00
004-540-039-7 1 Undeveloped 6,000 0 $0.00 $0.00
004-540-040-5 1 Undeveloped 6,000 0 $0.00 $0.00
004-540-041-3 1 Undeveloped 6,000 0 $0.00 $0.00
004-540-042-1 1 Undeveloped 6,000 0 $0.00 $0.00
004-540-043-9 1 Undeveloped 6,000 0 $0.00 $0.00
004-540-044-7 1 Undeveloped 6,000 0 $0.00 $0.00
004-540-045-4 1 Undeveloped 6,000 0 $0.00 $0.00
004-540-046-2 1 Undeveloped 6,000 0 $0.00 $0.00
004-540-047-0 1 Undeveloped 6,373 0 $0.00 $0.00
004-540-048-8 1 Exempt 77,537 0 $0.00 $0.00
004-550-001-4 1 Undeveloped 6,600 0 $0.00 $0.00
004-550-002-2 1 Undeveloped 6,600 0 $0.00 $0.00
004-550-003-0 1 Undeveloped 6,600 0 $0.00 $0.00
004-550-004-8 1 Undeveloped 6,600 0 $0.00 $0.00
004-550-005-5 1 Undeveloped 6,600 0 $0.00 $0.00
004-550-006-3 1 Undeveloped 6,600 0 $0.00 $0.00
004-550-007-1 1 Undeveloped 6,600 0 $0.00 $0.00
004-550-008-9 1 Undeveloped 7,780 0 $0.00 $0.00
004-550-009-7 1 Undeveloped 7,679 0 $0.00 $0.00
004-550-010-5 1 Undeveloped 7,800 0 $0.00 $0.00
004-550-011-3 1 Undeveloped 6,991 0 $0.00 $0.00
004-550-012-1 1 Undeveloped 11,807 0 $0.00 $0.00
Page 2 of 10
FY 2024-25 FY 2024-25
Unit Parcel Impervious Tier 1 Tier 1
Assessor's Tax Development Type of Unit Square Square Square Maximum Actual
Parcel Number Zone Status Property Count Footage Footage Footage Special Tax Special Tax
County of Contra Costa
Community Facilities District No. 2007-1
(Stormwater Management Facilities)
Fiscal Year 2024-25 Special Tax Levy
004-550-013-9 1 Undeveloped 12,363 0 $0.00 $0.00
004-550-014-7 1 Undeveloped 11,807 0 $0.00 $0.00
004-550-015-4 1 Undeveloped 6,991 0 $0.00 $0.00
004-550-016-2 1 Undeveloped 7,800 0 $0.00 $0.00
004-550-017-0 1 Undeveloped 7,679 0 $0.00 $0.00
004-550-018-8 1 Undeveloped 6,600 0 $0.00 $0.00
004-550-019-6 1 Undeveloped 6,600 0 $0.00 $0.00
004-550-020-4 1 Undeveloped 6,600 0 $0.00 $0.00
004-550-021-2 1 Undeveloped 7,541 0 $0.00 $0.00
004-550-022-0 1 Exempt 139,000 0 $0.00 $0.00
004-550-023-8 1 Exempt 20,631 0 $0.00 $0.00
004-560-001-2 1 Undeveloped 6,600 0 $0.00 $0.00
004-560-002-0 1 Undeveloped 6,600 0 $0.00 $0.00
004-560-003-8 1 Undeveloped 6,600 0 $0.00 $0.00
004-560-004-6 1 Undeveloped 6,600 0 $0.00 $0.00
004-560-005-3 1 Undeveloped 6,600 0 $0.00 $0.00
004-560-006-1 1 Undeveloped 6,600 0 $0.00 $0.00
004-560-007-9 1 Undeveloped 6,600 0 $0.00 $0.00
004-560-008-7 1 Undeveloped 6,600 0 $0.00 $0.00
004-560-009-5 1 Undeveloped 6,600 0 $0.00 $0.00
004-560-010-3 1 Undeveloped 6,600 0 $0.00 $0.00
004-560-011-1 1 Undeveloped 6,600 0 $0.00 $0.00
004-560-012-9 1 Undeveloped 6,600 0 $0.00 $0.00
004-560-013-7 1 Undeveloped 6,600 0 $0.00 $0.00
004-560-014-5 1 Undeveloped 6,600 0 $0.00 $0.00
004-560-015-2 1 Undeveloped 6,600 0 $0.00 $0.00
004-560-016-0 1 Undeveloped 6,600 0 $0.00 $0.00
004-560-017-8 1 Undeveloped 6,600 0 $0.00 $0.00
004-560-018-6 1 Undeveloped 6,600 0 $0.00 $0.00
004-560-019-4 1 Undeveloped 6,600 0 $0.00 $0.00
004-560-020-2 1 Undeveloped 6,600 0 $0.00 $0.00
004-560-021-0 1 Undeveloped 6,600 0 $0.00 $0.00
004-560-022-8 1 Undeveloped 6,600 0 $0.00 $0.00
004-560-023-6 1 Undeveloped 6,600 0 $0.00 $0.00
004-560-024-4 1 Undeveloped 6,600 0 $0.00 $0.00
004-560-025-1 1 Undeveloped 6,600 0 $0.00 $0.00
004-560-026-9 1 Undeveloped 6,600 0 $0.00 $0.00
004-560-027-7 1 Undeveloped 6,600 0 $0.00 $0.00
004-560-028-5 1 Undeveloped 6,600 0 $0.00 $0.00
004-560-029-3 1 Undeveloped 7,679 0 $0.00 $0.00
004-560-030-1 1 Undeveloped 7,800 0 $0.00 $0.00
004-560-031-9 1 Undeveloped 6,991 0 $0.00 $0.00
004-560-032-7 1 Undeveloped 11,807 0 $0.00 $0.00
004-560-033-5 1 Undeveloped 12,363 0 $0.00 $0.00
004-560-034-3 1 Undeveloped 11,807 0 $0.00 $0.00
004-560-035-0 1 Undeveloped 6,991 0 $0.00 $0.00
004-560-036-8 1 Undeveloped 7,800 0 $0.00 $0.00
004-560-037-6 1 Undeveloped 7,679 0 $0.00 $0.00
004-560-038-4 1 Undeveloped 6,600 0 $0.00 $0.00
004-560-039-2 1 Undeveloped 6,600 0 $0.00 $0.00
004-560-040-0 1 Undeveloped 6,600 0 $0.00 $0.00
004-560-041-8 1 Undeveloped 6,600 0 $0.00 $0.00
004-560-042-6 1 Undeveloped 6,600 0 $0.00 $0.00
004-560-043-4 1 Undeveloped 6,600 0 $0.00 $0.00
004-560-044-2 1 Undeveloped 6,600 0 $0.00 $0.00
004-570-001-0 1 Undeveloped 7,207 0 $0.00 $0.00
004-570-002-8 1 Undeveloped 6,300 0 $0.00 $0.00
004-570-003-6 1 Undeveloped 6,300 0 $0.00 $0.00
004-570-004-4 1 Undeveloped 6,300 0 $0.00 $0.00
004-570-005-1 1 Undeveloped 6,300 0 $0.00 $0.00
004-570-006-9 1 Undeveloped 6,300 0 $0.00 $0.00
004-570-007-7 1 Undeveloped 6,300 0 $0.00 $0.00
004-570-008-5 1 Undeveloped 6,300 0 $0.00 $0.00
004-570-009-3 1 Undeveloped 6,300 0 $0.00 $0.00
004-570-010-1 1 Undeveloped 7,329 0 $0.00 $0.00
004-570-011-9 1 Undeveloped 6,979 0 $0.00 $0.00
004-570-012-7 1 Undeveloped 6,000 0 $0.00 $0.00
004-570-013-5 1 Undeveloped 6,000 0 $0.00 $0.00
004-570-014-3 1 Undeveloped 6,000 0 $0.00 $0.00
004-570-015-0 1 Undeveloped 6,000 0 $0.00 $0.00
004-570-016-8 1 Undeveloped 6,000 0 $0.00 $0.00
004-570-017-6 1 Undeveloped 6,000 0 $0.00 $0.00
004-570-018-4 1 Undeveloped 6,000 0 $0.00 $0.00
004-570-019-2 1 Undeveloped 6,000 0 $0.00 $0.00
004-570-020-0 1 Undeveloped 6,993 0 $0.00 $0.00
004-570-021-8 1 Undeveloped 6,991 0 $0.00 $0.00
004-570-022-6 1 Undeveloped 6,000 0 $0.00 $0.00
004-570-023-4 1 Undeveloped 6,000 0 $0.00 $0.00
004-570-024-2 1 Undeveloped 6,000 0 $0.00 $0.00
004-570-025-9 1 Undeveloped 6,000 0 $0.00 $0.00
004-570-026-7 1 Undeveloped 6,000 0 $0.00 $0.00
004-570-027-5 1 Undeveloped 6,000 0 $0.00 $0.00
004-570-028-3 1 Undeveloped 6,000 0 $0.00 $0.00
004-570-029-1 1 Undeveloped 6,000 0 $0.00 $0.00
Page 3 of 10
FY 2024-25 FY 2024-25
Unit Parcel Impervious Tier 1 Tier 1
Assessor's Tax Development Type of Unit Square Square Square Maximum Actual
Parcel Number Zone Status Property Count Footage Footage Footage Special Tax Special Tax
County of Contra Costa
Community Facilities District No. 2007-1
(Stormwater Management Facilities)
Fiscal Year 2024-25 Special Tax Levy
004-570-030-9 1 Undeveloped 6,000 0 $0.00 $0.00
004-570-031-7 1 Undeveloped 6,373 0 $0.00 $0.00
004-570-032-5 1 Undeveloped 6,373 0 $0.00 $0.00
004-570-033-3 1 Undeveloped 6,000 0 $0.00 $0.00
004-570-034-1 1 Undeveloped 6,000 0 $0.00 $0.00
004-570-035-8 1 Undeveloped 6,000 0 $0.00 $0.00
004-570-036-6 1 Undeveloped 6,000 0 $0.00 $0.00
004-570-037-4 1 Undeveloped 6,000 0 $0.00 $0.00
004-570-038-2 1 Undeveloped 6,000 0 $0.00 $0.00
004-570-039-0 1 Undeveloped 6,000 0 $0.00 $0.00
004-570-040-8 1 Undeveloped 6,000 0 $0.00 $0.00
004-570-041-6 1 Undeveloped 6,000 0 $0.00 $0.00
004-570-042-4 1 Undeveloped 6,990 0 $0.00 $0.00
004-570-043-2 1 Undeveloped 6,988 0 $0.00 $0.00
004-570-044-0 1 Undeveloped 6,000 0 $0.00 $0.00
004-570-045-7 1 Undeveloped 6,000 0 $0.00 $0.00
004-570-046-5 1 Undeveloped 6,000 0 $0.00 $0.00
004-570-047-3 1 Undeveloped 6,000 0 $0.00 $0.00
004-570-048-1 1 Undeveloped 6,000 0 $0.00 $0.00
004-570-049-9 1 Undeveloped 6,000 0 $0.00 $0.00
004-570-050-7 1 Undeveloped 6,000 0 $0.00 $0.00
004-570-051-5 1 Undeveloped 6,000 0 $0.00 $0.00
004-570-052-3 1 Undeveloped 6,979 0 $0.00 $0.00
004-570-053-1 1 Undeveloped 6,979 0 $0.00 $0.00
004-570-054-9 1 Undeveloped 6,000 0 $0.00 $0.00
004-570-055-6 1 Undeveloped 6,000 0 $0.00 $0.00
004-570-056-4 1 Undeveloped 6,000 0 $0.00 $0.00
004-570-057-2 1 Undeveloped 6,000 0 $0.00 $0.00
004-570-058-0 1 Undeveloped 6,000 0 $0.00 $0.00
004-570-059-8 1 Undeveloped 6,000 0 $0.00 $0.00
004-570-060-6 1 Undeveloped 6,000 0 $0.00 $0.00
004-570-061-4 1 Undeveloped 6,000 0 $0.00 $0.00
004-570-062-2 1 Undeveloped 6,986 0 $0.00 $0.00
004-570-063-0 1 Undeveloped 6,984 0 $0.00 $0.00
004-570-064-8 1 Undeveloped 6,000 0 $0.00 $0.00
004-570-065-5 1 Undeveloped 6,000 0 $0.00 $0.00
004-570-066-3 1 Undeveloped 6,000 0 $0.00 $0.00
004-570-067-1 1 Undeveloped 6,000 0 $0.00 $0.00
004-570-068-9 1 Undeveloped 6,000 0 $0.00 $0.00
004-570-069-7 1 Undeveloped 6,000 0 $0.00 $0.00
004-570-070-5 1 Undeveloped 6,000 0 $0.00 $0.00
004-570-071-3 1 Undeveloped 6,000 0 $0.00 $0.00
004-570-072-1 1 Undeveloped 6,000 0 $0.00 $0.00
004-570-073-9 1 Undeveloped 6,373 0 $0.00 $0.00
004-570-074-7 1 Exempt 37,897 0 $0.00 $0.00
004-570-075-4 1 Exempt 43,124 0 $0.00 $0.00
004-570-076-2 1 Exempt 48,352 0 $0.00 $0.00
004-570-077-0 1 Exempt 66,211 0 $0.00 $0.00
011-220-013-4 1 Undeveloped 473,933 0 $0.00 $0.00
011-220-014-2 1 Undeveloped 435,600 0 $0.00 $0.00
011-230-053-8 1 Exempt 341,510 0 $0.00 $0.00
011-230-054-6 1 Exempt 1,955,844 0 $0.00 $0.00
020-190-083-4 1 Undeveloped 241,758 0 $0.00 $0.00
020-190-084-2 1 Undeveloped 855,083 0 $0.00 $0.00
095-060-026-2 1 Developed Single Family Property 4,393 0 $616.38 $233.54
095-060-027-0 1 Developed Single Family Property 3,740 0 $616.38 $233.54
095-060-028-8 1 Developed Single Family Property 3,742 0 $616.38 $233.54
095-060-029-6 1 Developed Single Family Property 4,393 0 $616.38 $233.54
095-060-030-4 1 Developed Single Family Property 5,351 0 $626.78 $237.50
095-060-031-2 1 Developed Single Family Property 3,157 0 $616.38 $233.54
095-060-032-0 1 Developed Single Family Property 3,162 0 $616.38 $233.54
095-060-033-8 1 Developed Single Family Property 3,454 0 $616.38 $233.54
095-060-034-6 1 Developed Single Family Property 4,426 0 $616.38 $233.54
096-031-022-5 1 Developed Other Property 0 53,431 $2,367.02 $896.88
098-180-010-5 1 Undeveloped 77,972 0 $0.00 $0.00
098-210-001-8 1 Undeveloped 7,691 0 $0.00 $0.00
098-210-001-8 1 Undeveloped 7,691 0 $0.00 $0.00
098-210-001-8 1 Undeveloped 7,691 0 $0.00 $0.00
098-210-001-8 1 Undeveloped 14,201 0 $0.00 $0.00
098-210-001-8 1 Undeveloped 14,201 0 $0.00 $0.00
098-210-001-8 1 Undeveloped 14,201 0 $0.00 $0.00
098-210-001-8 1 Undeveloped 14,201 0 $0.00 $0.00
098-210-001-8 1 Undeveloped 14,201 0 $0.00 $0.00
098-210-001-8 1 Undeveloped 14,201 0 $0.00 $0.00
098-210-001-8 1 Undeveloped 14,201 0 $0.00 $0.00
098-210-001-8 1 Undeveloped 14,201 0 $0.00 $0.00
098-210-001-8 1 Undeveloped 14,201 0 $0.00 $0.00
098-210-001-8 1 Undeveloped 14,201 0 $0.00 $0.00
098-210-001-8 1 Undeveloped 15,876 0 $0.00 $0.00
098-210-001-8 1 Undeveloped 15,876 0 $0.00 $0.00
098-210-001-8 1 Undeveloped 15,876 0 $0.00 $0.00
098-210-001-8 1 Undeveloped 15,876 0 $0.00 $0.00
098-210-001-8 1 Undeveloped 15,876 0 $0.00 $0.00
098-210-001-8 1 Undeveloped 10,471 0 $0.00 $0.00
Page 4 of 10
FY 2024-25 FY 2024-25
Unit Parcel Impervious Tier 1 Tier 1
Assessor's Tax Development Type of Unit Square Square Square Maximum Actual
Parcel Number Zone Status Property Count Footage Footage Footage Special Tax Special Tax
County of Contra Costa
Community Facilities District No. 2007-1
(Stormwater Management Facilities)
Fiscal Year 2024-25 Special Tax Levy
098-210-001-8 1 Undeveloped 10,471 0 $0.00 $0.00
098-210-001-8 1 Undeveloped 10,471 0 $0.00 $0.00
098-210-001-8 1 Undeveloped 15,876 0 $0.00 $0.00
098-210-001-8 1 Undeveloped 15,876 0 $0.00 $0.00
098-210-001-8 1 Undeveloped 15,876 0 $0.00 $0.00
098-210-001-8 1 Undeveloped 10,471 0 $0.00 $0.00
098-210-001-8 1 Undeveloped 10,471 0 $0.00 $0.00
098-210-001-8 1 Undeveloped 10,471 0 $0.00 $0.00
098-210-001-8 1 Undeveloped 10,471 0 $0.00 $0.00
098-210-001-8 1 Undeveloped 10,471 0 $0.00 $0.00
098-240-064-0 2 Developed Multi-Family Property 194 1,709 331,492 0 $3,308.28 $1,253.52
098-590-001-8 1 Developed Single Family Property 4,650 0 $616.38 $233.54
098-590-002-6 1 Developed Single Family Property 4,743 0 $616.38 $233.54
098-590-003-4 1 Developed Single Family Property 4,646 0 $616.38 $233.54
098-590-004-2 1 Developed Single Family Property 4,646 0 $616.38 $233.54
098-590-005-9 1 Developed Single Family Property 5,361 0 $626.78 $237.50
098-590-006-7 1 Developed Single Family Property 4,923 0 $616.38 $233.54
098-590-007-5 1 Developed Single Family Property 4,608 0 $616.38 $233.54
098-590-008-3 1 Developed Single Family Property 4,608 0 $616.38 $233.54
098-590-009-1 1 Developed Single Family Property 4,608 0 $616.38 $233.54
098-590-010-9 1 Developed Single Family Property 6,515 0 $638.08 $241.78
098-590-011-7 1 Developed Single Family Property 5,930 0 $626.78 $237.50
098-590-012-5 1 Developed Single Family Property 5,335 0 $626.78 $237.50
098-590-013-3 1 Developed Single Family Property 5,115 0 $626.78 $237.50
098-590-014-1 1 Developed Single Family Property 4,603 0 $616.38 $233.54
098-590-015-8 1 Developed Single Family Property 4,604 0 $616.38 $233.54
098-590-016-6 1 Developed Single Family Property 4,987 0 $616.38 $233.54
098-590-017-4 1 Developed Single Family Property 4,884 0 $616.38 $233.54
098-590-018-2 1 Developed Single Family Property 4,632 0 $616.38 $233.54
098-590-019-0 1 Developed Single Family Property 4,632 0 $616.38 $233.54
098-590-020-8 1 Developed Single Family Property 4,939 0 $616.38 $233.54
098-590-021-6 1 Developed Single Family Property 4,601 0 $616.38 $233.54
098-590-022-4 1 Developed Single Family Property 4,600 0 $616.38 $233.54
098-590-023-2 1 Developed Single Family Property 4,600 0 $616.38 $233.54
098-590-024-0 1 Developed Single Family Property 4,600 0 $616.38 $233.54
098-590-025-7 1 Developed Single Family Property 4,600 0 $616.38 $233.54
098-590-026-5 1 Developed Single Family Property 4,600 0 $616.38 $233.54
098-590-027-3 1 Developed Single Family Property 4,600 0 $616.38 $233.54
098-590-028-1 1 Developed Single Family Property 4,600 0 $616.38 $233.54
098-590-029-9 1 Developed Single Family Property 4,603 0 $616.38 $233.54
098-590-030-7 1 Developed Single Family Property 4,674 0 $616.38 $233.54
098-590-031-5 1 Developed Single Family Property 4,612 0 $616.38 $233.54
098-590-032-3 1 Developed Single Family Property 4,612 0 $616.38 $233.54
098-590-033-1 1 Developed Single Family Property 4,612 0 $616.38 $233.54
098-590-034-9 1 Developed Single Family Property 4,609 0 $616.38 $233.54
098-590-035-6 1 Developed Single Family Property 4,604 0 $616.38 $233.54
098-590-036-4 1 Developed Single Family Property 4,821 0 $616.38 $233.54
098-590-037-2 1 Developed Single Family Property 4,821 0 $616.38 $233.54
098-590-038-0 1 Developed Single Family Property 4,821 0 $616.38 $233.54
098-590-039-8 1 Developed Single Family Property 5,603 0 $626.78 $237.50
098-590-040-6 1 Developed Single Family Property 5,801 0 $626.78 $237.50
098-590-041-4 1 Developed Single Family Property 5,631 0 $626.78 $237.50
098-590-042-2 1 Developed Single Family Property 6,372 0 $638.08 $241.78
098-590-043-0 1 Developed Single Family Property 4,636 0 $616.38 $233.54
098-590-044-8 1 Developed Single Family Property 4,839 0 $616.38 $233.54
098-590-045-5 1 Developed Single Family Property 5,936 0 $626.78 $237.50
098-590-046-3 1 Developed Single Family Property 8,349 0 $663.34 $251.34
098-590-047-1 1 Developed Single Family Property 4,646 0 $616.38 $233.54
098-590-048-9 1 Developed Single Family Property 4,646 0 $616.38 $233.54
098-590-049-7 1 Developed Single Family Property 4,743 0 $616.38 $233.54
098-590-050-5 1 Developed Single Family Property 4,650 0 $616.38 $233.54
099-160-026-3 1 Undeveloped 0 0 $0.00 $0.00
099-160-027-1 1 Developed Other Property 0 265,716 $9,846.52 $3,730.90
099-210-023-0 1 Developed Other Property 0 19,026 $1,154.80 $437.56
116-063-026-3 1 Exempt 27,617 0 $0.00 $0.00
116-063-027-1 1 Exempt 15,595 0 $0.00 $0.00
116-063-028-9 1 Exempt 19,689 0 $0.00 $0.00
116-063-029-7 1 Exempt 21,432 0 $0.00 $0.00
116-063-030-5 1 Exempt 23,740 0 $0.00 $0.00
116-063-031-3 1 Exempt 18,295 0 $0.00 $0.00
116-063-032-1 1 Exempt 27,704 0 $0.00 $0.00
116-100-051-6 1 Exempt 14,985 0 $0.00 $0.00
116-100-052-4 1 Exempt 21,649 0 $0.00 $0.00
116-100-053-2 1 Exempt 24,611 0 $0.00 $0.00
116-100-054-0 1 Exempt 17,947 0 $0.00 $0.00
116-100-055-7 1 Exempt 18,034 0 $0.00 $0.00
116-100-056-5 1 Exempt 16,553 0 $0.00 $0.00
116-100-057-3 1 Exempt 17,380 0 $0.00 $0.00
116-100-058-1 1 Exempt 31,537 0 $0.00 $0.00
117-040-123-4 1 Exempt 19,558 0 $0.00 $0.00
117-040-124-2 1 Exempt 19,471 0 $0.00 $0.00
117-040-125-9 1 Exempt 18,252 0 $0.00 $0.00
117-040-126-7 1 Exempt 20,081 0 $0.00 $0.00
117-040-127-5 1 Exempt 19,950 0 $0.00 $0.00
Page 5 of 10
FY 2024-25 FY 2024-25
Unit Parcel Impervious Tier 1 Tier 1
Assessor's Tax Development Type of Unit Square Square Square Maximum Actual
Parcel Number Zone Status Property Count Footage Footage Footage Special Tax Special Tax
County of Contra Costa
Community Facilities District No. 2007-1
(Stormwater Management Facilities)
Fiscal Year 2024-25 Special Tax Levy
117-040-128-3 1 Exempt 18,295 0 $0.00 $0.00
117-040-129-1 1 Exempt 19,471 0 $0.00 $0.00
117-040-130-9 1 Exempt 19,602 0 $0.00 $0.00
125-120-118-0 1 Undeveloped 1,836 0 $0.00 $0.00
125-120-119-8 1 Developed Multi-Family Property 1 1,349 0 0 $471.44 $178.64
125-120-120-6 1 Developed Multi-Family Property 1 1,355 0 0 $471.44 $178.64
125-120-121-4 1 Developed Multi-Family Property 1 1,442 0 0 $471.44 $178.64
125-120-122-2 1 Developed Multi-Family Property 1 1,413 0 0 $471.44 $178.64
125-120-123-0 1 Developed Multi-Family Property 1 1,385 0 0 $471.44 $178.64
125-120-124-8 1 Developed Multi-Family Property 1 1,412 0 0 $471.44 $178.64
125-120-125-5 1 Undeveloped 1,631 0 $0.00 $0.00
138-120-019-3 1 Developed Other Property 0 14,116 $981.82 $372.02 /1
140-220-019-8 1 Developed Single Family Property 39,988 0 $910.36 $344.94
140-220-020-6 1 Developed Single Family Property 39,988 0 $910.36 $344.94
140-220-021-4 1 Undeveloped 110,512 0 $0.00 $0.00
148-170-051-4 2 Developed Multi-Family Property 284 363 103,063 0 $4,843.04 $1,835.06
148-480-014-7 1 Developed Other Property 0 125,987 $4,923.40 $1,865.50
159-040-094-9 1 Developed Other Property 0 27,925 $1,468.34 $556.36
161-150-013-1 1 Exempt 87,643 0 $0.00 $0.00
161-280-005-0 0 Undeveloped 85,813 0 $0.00 $0.00
161-280-034-0 0 Exempt 610 0 $0.00 $0.00
161-550-048-3 1 Undeveloped 6,005 0 $0.00 $0.00
161-550-049-1 1 Undeveloped 6,001 0 $0.00 $0.00
161-550-050-9 1 Undeveloped 6,000 0 $0.00 $0.00
161-550-051-7 1 Undeveloped 6,919 0 $0.00 $0.00
161-550-052-5 1 Undeveloped 6,003 0 $0.00 $0.00
161-550-053-3 1 Undeveloped 6,003 0 $0.00 $0.00
161-550-054-1 1 Undeveloped 6,003 0 $0.00 $0.00
161-550-055-8 1 Undeveloped 6,003 0 $0.00 $0.00
161-550-056-6 1 Undeveloped 6,003 0 $0.00 $0.00
161-550-057-4 1 Undeveloped 6,003 0 $0.00 $0.00
161-550-058-2 1 Undeveloped 8,586 0 $0.00 $0.00
161-550-059-0 1 Undeveloped 6,754 0 $0.00 $0.00
161-550-060-8 1 Undeveloped 6,756 0 $0.00 $0.00
161-550-061-6 1 Undeveloped 6,371 0 $0.00 $0.00
161-550-062-4 1 Undeveloped 6,744 0 $0.00 $0.00
161-550-063-2 1 Undeveloped 8,040 0 $0.00 $0.00
161-550-064-0 1 Undeveloped 8,040 0 $0.00 $0.00
161-550-065-7 1 Undeveloped 8,034 0 $0.00 $0.00
161-550-066-5 1 Undeveloped 8,036 0 $0.00 $0.00
161-550-067-3 1 Undeveloped 8,037 0 $0.00 $0.00
161-550-068-1 1 Undeveloped 6,001 0 $0.00 $0.00
161-550-069-9 1 Undeveloped 6,006 0 $0.00 $0.00
161-550-070-7 1 Undeveloped 6,003 0 $0.00 $0.00
161-550-071-5 1 Undeveloped 6,006 0 $0.00 $0.00
161-550-072-3 1 Undeveloped 6,006 0 $0.00 $0.00
161-550-073-1 1 Undeveloped 6,006 0 $0.00 $0.00
161-550-074-9 1 Undeveloped 6,006 0 $0.00 $0.00
161-550-075-6 1 Undeveloped 6,006 0 $0.00 $0.00
161-550-076-4 1 Undeveloped 6,045 0 $0.00 $0.00
161-550-077-2 1 Undeveloped 6,002 0 $0.00 $0.00
161-550-078-0 1 Undeveloped 6,002 0 $0.00 $0.00
161-550-079-8 1 Undeveloped 6,002 0 $0.00 $0.00
161-550-080-6 1 Undeveloped 6,002 0 $0.00 $0.00
161-550-081-4 1 Undeveloped 6,002 0 $0.00 $0.00
161-550-082-2 1 Undeveloped 6,928 0 $0.00 $0.00
161-550-083-0 1 Undeveloped 6,046 0 $0.00 $0.00
161-550-084-8 1 Undeveloped 6,047 0 $0.00 $0.00
161-550-085-5 1 Undeveloped 6,004 0 $0.00 $0.00
161-550-086-3 1 Exempt 10,643 0 $0.00 $0.00
161-550-087-1 1 Exempt 9,986 0 $0.00 $0.00
161-550-088-9 1 Exempt 6,189 0 $0.00 $0.00
161-550-089-7 1 Exempt 26,330 0 $0.00 $0.00
161-550-090-5 1 Exempt 11,466 0 $0.00 $0.00
161-550-091-3 1 Exempt 30,796 0 $0.00 $0.00
166-010-029-6 1 Developed Other Property 0 110,637 $4,382.58 $1,660.58
166-010-042-9 1 Developed Single Family Property 18,330 0 $745.08 $282.32
166-010-043-7 1 Developed Single Family Property 14,280 0 $745.08 $282.32
166-010-044-5 1 Developed Single Family Property 22,825 0 $820.74 $310.98
166-010-045-2 1 Developed Single Family Property 37,000 0 $910.36 $344.94
166-010-046-0 1 Undeveloped 30,400 0 $0.00 $0.00
166-010-047-8 1 Developed Single Family Property 50,200 0 $993.88 $376.58
166-010-048-6 1 Developed Single Family Property 24,700 0 $820.74 $310.98
166-010-049-4 1 Developed Single Family Property 22,170 0 $820.74 $310.98
166-010-050-2 1 Developed Single Family Property 39,200 0 $910.36 $344.94
166-210-018-7 1 Undeveloped 22,564 0 $0.00 $0.00
166-210-019-5 1 Developed Single Family Property 23,784 0 $820.74 $310.98
166-210-020-3 1 Developed Single Family Property 25,003 0 $820.74 $310.98
166-210-021-1 1 Undeveloped 25,570 0 $0.00 $0.00
166-210-022-9 1 Developed Single Family Property 38,681 0 $910.36 $344.94
166-210-023-7 1 Undeveloped 69,696 0 $0.00 $0.00
166-210-024-5 1 Undeveloped 38,376 0 $0.00 $0.00
166-210-025-2 1 Undeveloped 28,662 0 $0.00 $0.00
166-210-026-0 1 Developed Single Family Property 62,291 0 $993.88 $376.58
Page 6 of 10
FY 2024-25 FY 2024-25
Unit Parcel Impervious Tier 1 Tier 1
Assessor's Tax Development Type of Unit Square Square Square Maximum Actual
Parcel Number Zone Status Property Count Footage Footage Footage Special Tax Special Tax
County of Contra Costa
Community Facilities District No. 2007-1
(Stormwater Management Facilities)
Fiscal Year 2024-25 Special Tax Levy
166-240-037-1 1 Undeveloped 27,094 0 $0.00 $0.00
166-240-038-9 1 Developed Single Family Property 28,706 0 $820.74 $310.98
166-240-039-7 1 Undeveloped 45,520 0 $0.00 $0.00
166-240-040-5 1 Undeveloped 35,937 0 $0.00 $0.00
167-360-002-7 1 Developed Other Property 0 56,250 $2,466.34 $934.50
167-360-004-3 1 Undeveloped 0 0 $0.00 $0.00
169-150-012-6 1 Undeveloped 55,539 0 $0.00 $0.00
169-150-013-4 1 Undeveloped 43,821 0 $0.00 $0.00
169-150-015-9 1 Undeveloped 57,238 0 $0.00 $0.00
169-150-016-7 1 Undeveloped 41,905 0 $0.00 $0.00
169-150-017-5 1 Undeveloped 40,554 0 $0.00 $0.00
169-150-018-3 1 Undeveloped 44,083 0 $0.00 $0.00
169-150-019-1 1 Undeveloped 41,382 0 $0.00 $0.00
169-150-020-9 1 Undeveloped 52,011 0 $0.00 $0.00
169-150-021-7 1 Undeveloped 45,607 0 $0.00 $0.00
169-150-022-5 1 Undeveloped 43,212 0 $0.00 $0.00
172-012-064-9 1 Exempt 0 0 $0.00 $0.00
172-340-001-4 1 Exempt 11,263 0 $0.00 $0.00
172-340-002-2 1 Developed Multi-Family Property 1 1,408 11,263 0 $471.44 $178.64
172-340-003-0 1 Developed Multi-Family Property 1 1,408 11,263 0 $471.44 $178.64
172-340-004-8 1 Developed Multi-Family Property 1 1,408 11,263 0 $471.44 $178.64
172-340-005-5 1 Developed Multi-Family Property 1 1,408 11,263 0 $471.44 $178.64
172-340-006-3 1 Developed Multi-Family Property 1 1,408 11,263 0 $471.44 $178.64
172-340-007-1 1 Developed Multi-Family Property 1 1,408 11,263 0 $471.44 $178.64
172-340-008-9 1 Developed Multi-Family Property 1 1,408 11,263 0 $471.44 $178.64
172-340-009-7 1 Developed Multi-Family Property 1 1,408 11,263 0 $471.44 $178.64
172-340-010-5 1 Exempt 14,582 0 $0.00 $0.00
172-340-011-3 1 Developed Multi-Family Property 1 1,823 14,582 0 $471.44 $178.64
172-340-012-1 1 Developed Multi-Family Property 1 1,823 14,582 0 $471.44 $178.64
172-340-013-9 1 Developed Multi-Family Property 1 1,823 14,582 0 $471.44 $178.64
172-340-014-7 1 Developed Multi-Family Property 1 1,823 14,582 0 $471.44 $178.64
172-340-015-4 1 Developed Multi-Family Property 1 1,823 14,582 0 $471.44 $178.64
172-340-016-2 1 Developed Multi-Family Property 1 1,823 14,582 0 $471.44 $178.64
172-340-017-0 1 Developed Multi-Family Property 1 1,823 14,582 0 $471.44 $178.64
172-340-018-8 1 Developed Multi-Family Property 1 1,823 14,582 0 $471.44 $178.64
172-340-019-6 1 Exempt 8,834 0 $0.00 $0.00
172-340-020-4 1 Undeveloped 8,834 0 $0.00 $0.00
172-340-021-2 1 Undeveloped 8,834 0 $0.00 $0.00
172-340-022-0 1 Undeveloped 8,834 0 $0.00 $0.00
172-340-023-8 1 Undeveloped 8,834 0 $0.00 $0.00
172-340-024-6 1 Undeveloped 8,834 0 $0.00 $0.00
172-340-025-3 1 Undeveloped 8,834 0 $0.00 $0.00
172-340-026-1 1 Exempt 9,553 0 $0.00 $0.00
172-340-027-9 1 Undeveloped 9,553 0 $0.00 $0.00
172-340-028-7 1 Undeveloped 9,553 0 $0.00 $0.00
172-340-029-5 1 Undeveloped 9,553 0 $0.00 $0.00
172-340-030-3 1 Undeveloped 9,553 0 $0.00 $0.00
172-340-031-1 1 Undeveloped 9,553 0 $0.00 $0.00
172-340-032-9 1 Exempt 8,534 0 $0.00 $0.00
172-340-033-7 1 Undeveloped 8,534 0 $0.00 $0.00
172-340-034-5 1 Undeveloped 8,534 0 $0.00 $0.00
172-340-035-2 1 Undeveloped 8,534 0 $0.00 $0.00
172-340-036-0 1 Exempt 7,695 0 $0.00 $0.00
172-340-037-8 1 Undeveloped 7,695 0 $0.00 $0.00
172-340-038-6 1 Undeveloped 7,695 0 $0.00 $0.00
172-340-039-4 1 Undeveloped 7,695 0 $0.00 $0.00
172-340-040-2 1 Undeveloped 7,695 0 $0.00 $0.00
172-350-001-1 1 Developed Multi-Family Property 1 1,234 9,870 0 $471.44 $178.64
172-350-002-9 1 Developed Multi-Family Property 1 1,234 9,870 0 $471.44 $178.64
172-350-003-7 1 Developed Multi-Family Property 1 1,234 9,870 0 $471.44 $178.64
172-350-004-5 1 Developed Multi-Family Property 1 1,234 9,870 0 $471.44 $178.64
172-350-005-2 1 Developed Multi-Family Property 1 1,234 9,870 0 $471.44 $178.64
172-350-006-0 1 Developed Multi-Family Property 1 1,234 9,870 0 $471.44 $178.64
172-350-007-8 1 Developed Multi-Family Property 1 1,234 9,870 0 $471.44 $178.64
172-350-008-6 1 Developed Multi-Family Property 1 1,234 9,870 0 $471.44 $178.64
172-350-009-4 1 Exempt 9,870 0 $0.00 $0.00
172-350-010-2 1 Developed Multi-Family Property 1 1,185 9,478 0 $471.44 $178.64
172-350-011-0 1 Developed Multi-Family Property 1 1,185 9,478 0 $471.44 $178.64
172-350-012-8 1 Developed Multi-Family Property 1 1,185 9,478 0 $471.44 $178.64
172-350-013-6 1 Developed Multi-Family Property 1 1,185 9,478 0 $471.44 $178.64
172-350-014-4 1 Developed Multi-Family Property 1 1,185 9,478 0 $471.44 $178.64
172-350-015-1 1 Developed Multi-Family Property 1 1,185 9,478 0 $471.44 $178.64
172-350-016-9 1 Developed Multi-Family Property 1 1,185 9,478 0 $471.44 $178.64
172-350-017-7 1 Developed Multi-Family Property 1 1,185 9,478 0 $471.44 $178.64
172-350-018-5 1 Exempt 9,478 0 $0.00 $0.00
172-350-019-3 1 Developed Multi-Family Property 1 1,446 8,675 0 $471.44 $178.64
172-350-020-1 1 Developed Multi-Family Property 1 1,446 8,675 0 $471.44 $178.64
172-350-021-9 1 Developed Multi-Family Property 1 1,446 8,675 0 $471.44 $178.64
172-350-022-7 1 Developed Multi-Family Property 1 1,446 8,675 0 $471.44 $178.64
172-350-023-5 1 Developed Multi-Family Property 1 1,446 8,675 0 $471.44 $178.64
172-350-024-3 1 Developed Multi-Family Property 1 1,446 8,675 0 $471.44 $178.64
172-350-025-0 1 Exempt 8,675 0 $0.00 $0.00
172-350-026-8 1 Developed Multi-Family Property 1 1,654 9,924 0 $471.44 $178.64
172-350-027-6 1 Developed Multi-Family Property 1 1,654 9,924 0 $471.44 $178.64
Page 7 of 10
FY 2024-25 FY 2024-25
Unit Parcel Impervious Tier 1 Tier 1
Assessor's Tax Development Type of Unit Square Square Square Maximum Actual
Parcel Number Zone Status Property Count Footage Footage Footage Special Tax Special Tax
County of Contra Costa
Community Facilities District No. 2007-1
(Stormwater Management Facilities)
Fiscal Year 2024-25 Special Tax Levy
172-350-028-4 1 Developed Multi-Family Property 1 1,654 9,924 0 $471.44 $178.64
172-350-029-2 1 Developed Multi-Family Property 1 1,654 9,924 0 $471.44 $178.64
172-350-030-0 1 Developed Multi-Family Property 1 1,654 9,924 0 $471.44 $178.64
172-350-031-8 1 Developed Multi-Family Property 1 1,654 9,924 0 $471.44 $178.64
172-350-032-6 1 Exempt 9,924 0 $0.00 $0.00
172-350-033-4 1 Developed Multi-Family Property 1 1,401 12,607 0 $471.44 $178.64
172-350-034-2 1 Developed Multi-Family Property 1 1,401 12,607 0 $471.44 $178.64
172-350-035-9 1 Developed Multi-Family Property 1 1,401 12,607 0 $471.44 $178.64
172-350-036-7 1 Developed Multi-Family Property 1 1,401 12,607 0 $471.44 $178.64
172-350-037-5 1 Developed Multi-Family Property 1 1,401 12,607 0 $471.44 $178.64
172-350-038-3 1 Developed Multi-Family Property 1 1,401 12,607 0 $471.44 $178.64
172-350-039-1 1 Developed Multi-Family Property 1 1,401 12,607 0 $471.44 $178.64
172-350-040-9 1 Developed Multi-Family Property 1 1,401 12,607 0 $471.44 $178.64
172-350-041-7 1 Developed Multi-Family Property 1 1,401 12,607 0 $471.44 $178.64
172-350-042-5 1 Exempt 12,607 0 $0.00 $0.00
172-350-043-3 1 Developed Multi-Family Property 1 1,478 7,389 0 $471.44 $178.64
172-350-044-1 1 Developed Multi-Family Property 1 1,478 7,389 0 $471.44 $178.64
172-350-045-8 1 Developed Multi-Family Property 1 1,478 7,389 0 $471.44 $178.64
172-350-046-6 1 Developed Multi-Family Property 1 1,478 7,389 0 $471.44 $178.64
172-350-047-4 1 Developed Multi-Family Property 1 1,478 7,389 0 $471.44 $178.64
172-350-048-2 1 Exempt 7,389 0 $0.00 $0.00
172-350-049-0 1 Developed Multi-Family Property 1 2,343 21,088 0 $471.44 $178.64
172-350-050-8 1 Developed Multi-Family Property 1 2,343 21,088 0 $471.44 $178.64
172-350-051-6 1 Developed Multi-Family Property 1 2,343 21,088 0 $471.44 $178.64
172-350-052-4 1 Developed Multi-Family Property 1 2,343 21,088 0 $471.44 $178.64
172-350-053-2 1 Developed Multi-Family Property 1 2,343 21,088 0 $471.44 $178.64
172-350-054-0 1 Developed Multi-Family Property 1 2,343 21,088 0 $471.44 $178.64
172-350-055-7 1 Developed Multi-Family Property 1 2,343 21,088 0 $471.44 $178.64
172-350-056-5 1 Developed Multi-Family Property 1 2,343 21,088 0 $471.44 $178.64
172-350-057-3 1 Developed Multi-Family Property 1 2,343 21,088 0 $471.44 $178.64
172-350-058-1 1 Exempt 21,088 0 $0.00 $0.00
172-360-001-9 1 Exempt 10,268 0 $0.00 $0.00
172-360-002-7 1 Undeveloped 10,268 0 $0.00 $0.00
172-360-003-5 1 Undeveloped 10,268 0 $0.00 $0.00
172-360-004-3 1 Undeveloped 10,268 0 $0.00 $0.00
172-360-005-0 1 Undeveloped 10,268 0 $0.00 $0.00
172-360-006-8 1 Undeveloped 10,268 0 $0.00 $0.00
172-360-007-6 1 Undeveloped 10,268 0 $0.00 $0.00
172-360-008-4 1 Undeveloped 10,268 0 $0.00 $0.00
172-360-009-2 1 Exempt 9,539 0 $0.00 $0.00
172-360-010-0 1 Undeveloped 9,539 0 $0.00 $0.00
172-360-011-8 1 Undeveloped 9,539 0 $0.00 $0.00
172-360-012-6 1 Undeveloped 9,539 0 $0.00 $0.00
172-360-013-4 1 Undeveloped 9,539 0 $0.00 $0.00
172-360-014-2 1 Undeveloped 9,539 0 $0.00 $0.00
172-360-015-9 1 Undeveloped 9,539 0 $0.00 $0.00
172-360-016-7 1 Undeveloped 9,539 0 $0.00 $0.00
172-360-017-5 1 Exempt 10,282 0 $0.00 $0.00
172-360-018-3 1 Undeveloped 10,282 0 $0.00 $0.00
172-360-019-1 1 Undeveloped 10,282 0 $0.00 $0.00
172-360-020-9 1 Undeveloped 10,282 0 $0.00 $0.00
172-360-021-7 1 Undeveloped 10,282 0 $0.00 $0.00
172-360-022-5 1 Undeveloped 10,282 0 $0.00 $0.00
172-360-023-3 1 Undeveloped 10,282 0 $0.00 $0.00
172-360-024-1 1 Exempt 8,988 0 $0.00 $0.00
172-360-025-8 1 Undeveloped 8,988 0 $0.00 $0.00
172-360-026-6 1 Undeveloped 8,988 0 $0.00 $0.00
172-360-027-4 1 Undeveloped 8,988 0 $0.00 $0.00
172-360-028-2 1 Undeveloped 8,988 0 $0.00 $0.00
172-360-029-0 1 Undeveloped 8,988 0 $0.00 $0.00
172-360-030-8 1 Undeveloped 8,988 0 $0.00 $0.00
172-360-031-6 1 Exempt 9,624 0 $0.00 $0.00
172-360-032-4 1 Developed Multi-Family Property 1 1,604 9,624 0 $471.44 $178.64
172-360-033-2 1 Developed Multi-Family Property 1 1,604 9,624 0 $471.44 $178.64
172-360-034-0 1 Developed Multi-Family Property 1 1,604 9,624 0 $471.44 $178.64
172-360-035-7 1 Developed Multi-Family Property 1 1,604 9,624 0 $471.44 $178.64
172-360-036-5 1 Developed Multi-Family Property 1 1,604 9,624 0 $471.44 $178.64
172-360-037-3 1 Developed Multi-Family Property 1 1,604 9,624 0 $471.44 $178.64
172-360-038-1 1 Exempt 11,086 0 $0.00 $0.00
172-360-039-9 1 Developed Multi-Family Property 1 1,386 11,086 0 $471.44 $178.64
172-360-040-7 1 Developed Multi-Family Property 1 1,386 11,086 0 $471.44 $178.64
172-360-041-5 1 Developed Multi-Family Property 1 1,386 11,086 0 $471.44 $178.64
172-360-042-3 1 Developed Multi-Family Property 1 1,386 11,086 0 $471.44 $178.64
172-360-043-1 1 Developed Multi-Family Property 1 1,386 11,086 0 $471.44 $178.64
172-360-044-9 1 Developed Multi-Family Property 1 1,386 11,086 0 $471.44 $178.64
172-360-045-6 1 Developed Multi-Family Property 1 1,386 11,086 0 $471.44 $178.64
172-360-046-4 1 Developed Multi-Family Property 1 1,386 11,086 0 $471.44 $178.64
177-140-055-1 1 Developed Other Property 0 40,010 $1,894.14 $717.70
180-131-036-6 1 Developed Single Family Property 18,519 0 $745.08 $282.32
180-131-037-4 1 Developed Single Family Property 17,503 0 $745.08 $282.32
184-100-034-0 1 Developed Single Family Property 6,217 0 $638.08 $241.78
184-100-035-7 1 Developed Single Family Property 4,343 0 $616.38 $233.54
184-100-036-5 1 Developed Single Family Property 6,971 0 $638.08 $241.78
184-100-037-3 1 Developed Single Family Property 9,129 0 $663.34 $251.34
Page 8 of 10
FY 2024-25 FY 2024-25
Unit Parcel Impervious Tier 1 Tier 1
Assessor's Tax Development Type of Unit Square Square Square Maximum Actual
Parcel Number Zone Status Property Count Footage Footage Footage Special Tax Special Tax
County of Contra Costa
Community Facilities District No. 2007-1
(Stormwater Management Facilities)
Fiscal Year 2024-25 Special Tax Levy
184-100-038-1 1 Developed Single Family Property 7,349 0 $648.54 $245.74
184-100-039-9 1 Developed Single Family Property 13,573 0 $694.62 $263.20
184-100-040-7 1 Developed Single Family Property 13,993 0 $694.62 $263.20
184-100-041-5 1 Developed Single Family Property 11,496 0 $694.62 $263.20
184-100-042-3 1 Developed Single Family Property 7,187 0 $648.54 $245.74
184-100-043-1 1 Developed Single Family Property 7,864 0 $648.54 $245.74
184-100-044-9 1 Developed Single Family Property 6,787 0 $638.08 $241.78
184-100-045-6 1 Developed Single Family Property 8,090 0 $663.34 $251.34
184-100-046-4 1 Developed Single Family Property 8,061 0 $663.34 $251.34
184-100-047-2 1 Developed Single Family Property 7,514 0 $648.54 $245.74
184-100-048-0 1 Developed Single Family Property 5,083 0 $626.78 $237.50
184-100-049-8 1 Developed Single Family Property 7,578 0 $648.54 $245.74
184-450-038-7 1 Developed Other Property 0 28,533 $1,489.78 $564.48 /2
184-590-001-6 1 Developed Multi-Family Property 1 1,557 0 0 $471.44 $178.64
184-590-002-4 1 Developed Multi-Family Property 1 1,557 0 0 $471.44 $178.64
184-590-003-2 1 Developed Multi-Family Property 1 1,557 0 0 $471.44 $178.64
184-590-004-0 1 Developed Multi-Family Property 1 1,557 0 0 $471.44 $178.64
184-590-005-7 1 Developed Multi-Family Property 1 1,557 0 0 $471.44 $178.64
184-590-006-5 1 Developed Multi-Family Property 1 1,557 0 0 $471.44 $178.64
184-590-007-3 1 Developed Multi-Family Property 1 1,557 0 0 $471.44 $178.64
184-590-008-1 1 Developed Multi-Family Property 1 1,557 0 0 $471.44 $178.64
184-590-009-9 1 Developed Multi-Family Property 1 1,557 0 0 $471.44 $178.64
184-590-010-7 1 Developed Multi-Family Property 1 1,557 0 0 $471.44 $178.64
184-590-011-5 1 Developed Multi-Family Property 1 1,557 0 0 $471.44 $178.64
184-590-012-3 1 Developed Multi-Family Property 1 1,557 0 0 $471.44 $178.64
184-590-013-1 1 Developed Multi-Family Property 1 1,557 0 0 $471.44 $178.64
184-590-014-9 1 Developed Multi-Family Property 1 1,557 0 0 $471.44 $178.64
185-220-032-6 1 Undeveloped 5,576 0 $0.00 $0.00
185-220-033-4 1 Undeveloped 4,577 0 $0.00 $0.00
185-220-034-2 1 Undeveloped 4,186 0 $0.00 $0.00
185-220-035-9 1 Undeveloped 3,193 0 $0.00 $0.00
185-220-036-7 1 Undeveloped 6,050 0 $0.00 $0.00
185-220-037-5 1 Undeveloped 10,692 0 $0.00 $0.00
185-220-038-3 1 Exempt 0 0 $0.00 $0.00
185-220-039-1 1 Exempt 0 0 $0.00 $0.00
187-180-031-2 1 Developed Single Family Property 29,403 0 $820.74 $310.98
187-180-032-0 1 Developed Single Family Property 20,560 0 $820.74 $310.98
187-231-034-5 1 Developed Single Family Property 24,350 0 $820.74 $310.98
187-231-035-2 1 Developed Single Family Property 20,909 0 $820.74 $310.98
188-232-042-5 1 Developed Single Family Property 31,145 0 $910.36 $344.94
188-232-043-3 1 Developed Single Family Property 22,303 0 $820.74 $310.98
188-232-044-1 1 Developed Single Family Property 33,411 0 $910.36 $344.94
192-240-024-5 1 Developed Single Family Property 41,469 0 $993.88 $376.58
192-240-025-2 1 Undeveloped 66,342 0 $0.00 $0.00
193-111-022-3 1 Developed Single Family Property 27,007 0 $820.74 $310.98
193-111-023-1 1 Undeveloped 29,316 0 $0.00 $0.00
193-210-029-8 1 Developed Single Family Property 20,691 0 $820.74 $310.98
193-210-030-6 1 Developed Single Family Property 21,911 0 $820.74 $310.98
193-210-033-0 1 Developed Single Family Property 25,700 0 $820.74 $310.98
193-210-034-8 1 Developed Single Family Property 28,837 0 $820.74 $310.98
195-351-044-1 1 Developed Single Family Property 41,251 0 $993.88 $376.58
195-351-045-8 1 Developed Single Family Property 56,149 0 $993.88 $376.58
197-090-003-9 1 Developed Other Property 0 18,215 $1,126.24 $426.74
198-081-021-0 1 Developed Single Family Property 21,780 0 $820.74 $310.98
198-081-022-8 1 Developed Single Family Property 21,780 0 $820.74 $310.98
198-100-005-0 1 Developed Single Family Property 40,075 0 $993.88 $376.58
198-100-013-4 1 Developed Single Family Property 20,125 0 $820.74 $310.98
198-100-014-2 1 Undeveloped 62,901 0 $0.00 $0.00
198-100-015-9 1 Developed Single Family Property 78,844 0 $993.88 $376.58
198-100-016-7 1 Developed Single Family Property 41,382 0 $993.88 $376.58
201-010-021-8 1 Developed Single Family Property 24,916 0 $820.74 $310.98
201-010-022-6 1 Undeveloped 23,479 0 $0.00 $0.00
201-010-023-4 1 Undeveloped 28,401 0 $0.00 $0.00
201-010-024-2 1 Undeveloped 28,314 0 $0.00 $0.00
201-010-025-9 1 Developed Single Family Property 26,005 0 $820.74 $310.98
201-010-026-7 1 Undeveloped 26,267 0 $0.00 $0.00
203-150-002-4 1 Developed Other Property 0 43,705 $2,024.34 $767.02
203-770-005-7 1 Developed Other Property 0 12,650 $930.16 $352.44
223-042-007-3 1 Developed Agricultural Property 0 0 $993.88 $376.58
357-140-054-2 1 Undeveloped 5,314 0 $0.00 $0.00
357-140-056-7 1 Developed Single Family Property 5,968 0 $626.78 $237.50
357-140-057-5 1 Developed Single Family Property 3,790 0 $616.38 $233.54
357-140-058-3 1 Developed Single Family Property 4,835 0 $616.38 $233.54
357-140-059-1 1 Developed Single Family Property 4,269 0 $616.38 $233.54
357-140-060-9 1 Developed Single Family Property 5,924 0 $626.78 $237.50
357-140-061-7 1 Developed Single Family Property 10,051 0 $694.62 $263.20
357-140-062-5 1 Undeveloped 4,751 0 $0.00 $0.00
357-140-063-3 1 Undeveloped 5,300 0 $0.00 $0.00
357-140-064-1 1 Undeveloped 10,019 0 $0.00 $0.00
362-230-012-1 1 Undeveloped 79,976 19,539 $0.00 $0.00
362-230-013-9 1 Undeveloped 45,564 19,539 $0.00 $0.00
380-010-026-9 1 Developed Other Property 0 74,980 $3,126.26 $1,184.56 /3
408-090-049-3 1 Developed Other Property 0 390,936 $14,258.44 $5,402.60
408-180-012-2 1 Undeveloped 0 0 $0.00 $0.00
Page 9 of 10
FY 2024-25 FY 2024-25
Unit Parcel Impervious Tier 1 Tier 1
Assessor's Tax Development Type of Unit Square Square Square Maximum Actual
Parcel Number Zone Status Property Count Footage Footage Footage Special Tax Special Tax
County of Contra Costa
Community Facilities District No. 2007-1
(Stormwater Management Facilities)
Fiscal Year 2024-25 Special Tax Levy
408-180-013-0 1 Developed Other Property 0 997,443 $35,627.72 $13,499.54
408-270-001-6 1 Developed Other Property 0 48,732 $2,201.46 $834.14
408-270-002-4 1 Developed Other Property 0 25,359 $1,377.92 $522.10
408-270-003-2 1 Developed Other Property 0 35,900 $1,749.34 $662.84
408-270-004-0 1 Developed Other Property 0 60,494 $2,615.88 $991.16
408-270-005-7 1 Developed Other Property 0 36,205 $1,760.10 $666.90
408-270-006-5 1 Undeveloped 0 0 $0.00 $0.00
408-270-007-3 1 Undeveloped 0 0 $0.00 $0.00
408-270-008-1 1 Undeveloped 0 0 $0.00 $0.00
408-270-009-9 1 Undeveloped 0 0 $0.00 $0.00
408-270-010-7 1 Undeveloped 0 0 $0.00 $0.00
409-080-028-7 1 Developed Multi-Family Property 42 713 29,926 0 $19,800.48 $7,502.52
409-080-028-7 1 Developed Other Property 0 702 $509.18 $192.92
409-320-037-8 1 Developed Other Property 0 114,563 $4,520.90 $1,712.98
420-021-032-8 1 Developed Other Property 0 23,631 $1,317.06 $499.04
420-080-025-0 1 Developed Other Property 0 70,820 $2,979.68 $1,129.02 /4
426-030-070-4 1 Undeveloped 41,382 0 $0.00 $0.00
426-030-071-2 1 Undeveloped 238,927 0 $0.00 $0.00
430-161-023-6 1 Undeveloped 8,550 0 $0.00 $0.00
430-161-024-4 1 Undeveloped 8,430 0 $0.00 $0.00
430-161-025-1 1 Exempt 920 0 $0.00 $0.00
430-161-026-9 1 Undeveloped 8,421 0 $0.00 $0.00
Total Fiscal Year 2024-25 Special Tax Levy $103,868.42
(1) Project spans over two parcels; the Incremental Special Tax per Impervious Square Foot for APN 138-120-018-5 is levied on APN 138-120-019-3.
(2) Project spans over three parcels; the Incremental Special Tax per Impervious Square Foot for APNs 184-450-039-5 and 184-450-040-3 is levied on APN 184-450-038-7.
(3) Project spans over two parcels; the Incremental Special Tax per Impervious Square Foot for APN 380-010-023-6 is levied on APN 380-010-026-9.
(4) Project spans over three parcels; the Incremental Special Tax per Impervious Square Foot for APNs 419-180-020-2 and 420-080-004-5 is levied on APN 420-080-025-0.
Goodwin Consulting Group, Inc.
Page 10 of 10
APPENDIX C
Rate and Method of Apportionment
of Special Tax
CCC CFD No. 2007-1 1 July 2, 2007
COUNTY OF CONTRA COSTA
COMMUNITY FACILITIES DISTRICT NO. 2007-1
(STORMWATER FACILITY MAINTENANCE)
RATE AND METHOD OF APPORTIONMENT OF SPECIAL TAX
Special Taxes applicable to each Assessor’s Parcel in Community Facilities District No. 2007-1
(Stormwater Facility Maintenance) [herein “CFD No. 2007-1” or “CFD”] shall be levied and
collected according to the tax liability determined by the Board of Supervisors of the County of
Contra Costa, acting in its capacity as the legislative body of CFD No. 2007-1, through the
application of the appropriate Special Taxes, as described below. All of the property in CFD
No. 2007-1, unless exempted by law or by the provisions of Section E below, shall be taxed for
the purposes, to the extent, and in the manner herein provided, including property subsequently
annexed to CFD No. 2007-1 unless a separate Rate and Method of Apportionment of Special Tax
is adopted for the annexation area.
A. DEFINITIONS
The terms hereinafter set forth have the following meanings:
“Act” means the Mello-Roos Community Facilities Act of 1982, as amended, being Chapter 2.5
(commencing with Section 53311), Division 2, of Title 5 of the Government Code of the State of
California.
“Administrative Expenses” means the direct and indirect expenses incurred by the CFD or the
County in connection with the establishment and administration of CFD No. 2007-1 (including,
but not limited to, the levy and collection of the Special Taxes) including the fees and expenses
of attorneys, any fees of the County or the CFD related to CFD No. 2007-1 or the collection of
Special Taxes, an allocable share of the salaries of County or CFD staff directly related thereto
and a proportionate amount of the County’s and the CFD’s general administrative overhead
related thereto, any amounts paid by the County or the CFD from their respective general funds
with respect to CFD No. 2007-1 or the services authorized to be financed by CFD No. 2007-1,
and expenses incurred by the County or the CFD in undertaking action to foreclose on properties
for which the payment of Special Taxes is delinquent, any amounts necessary to maintain a
reserve required by CFD No. 2007-1 for the payment of services and all other costs and expenses
of the County or the CFD in any way related to CFD No. 2007-1.
“Administrator” means the person or firm designated by the Board of Supervisors to administer
the Special Taxes according to this RMA.
“Agricultural Property” means, in any Fiscal Year, all Parcels of Developed Property for
which a building permit was issued for construction of a structure located on land that is
designated for agricultural use pursuant to the County’s General Plan.
CCC CFD No. 2007-1 2 July 2, 2007
“Assessor’s Parcel” means a lot or parcel shown on an Assessor’s Parcel Map with an assigned
Assessor’s Parcel number.
“Authorized Services” means, collectively, the Authorized Tier 1 Services and Authorized Tier
2 Services.
“Authorized Tier 1 Services” means the public services identified as Tier 1 services that are
authorized to be funded by CFD No. 2007-1, as set forth in the CFD formation documents
adopted by the Board of Supervisors.
“Authorized Tier 2 Services” means the public services identified as Tier 2 services that are
authorized to be funded by CFD No. 2007-1, as set forth in the CFD formation documents
adopted by the Board of Supervisors.
“Board of Supervisors” means the Board of Supervisors of the County of Contra Costa, acting
as the legislative body of CFD No. 2007-1.
“County” means the County of Contra Costa.
“Developed Property” means, in any Fiscal Year, all Parcels of Taxable Property for which (i)
a building permit for new construction or substantial redevelopment of a residential or non-
residential structure was issued prior to June 1 of the preceding Fiscal Year, or (ii) land use
entitlement(s) involving the creation or redevelopment of impervious surface is granted and
exercised where no building permit is required. . Developed Property shall not include Parcels
on which a structure(s) exists at the time CFD No. 2007-1 was formed unless additional building
permits are issued for additional development or substantial redevelopment on the Parcel or, for
future annexations, at the time that Parcel(s) is annexed to CFD No. 2007-1.
“Fiscal Year” means the period starting on July 1 and ending on the following June 30.
“Impervious Square Foot” or “Impervious Square Footage” means the impervious square
footage assigned to a Parcel as determined by the County Public Works Department.
“Maximum Special Taxes” means, collectively, the Maximum Tier 1 Special Tax and
Maximum Tier 2 Special Tax.
“Maximum Tier 1 Special Tax” means the maximum Tier 1 Special Tax that can be levied on
Taxable Property in any Fiscal Year determined in accordance with Section C below.
“Maximum Tier 2 Special Tax” means the maximum Tier 2 Special Tax that can be levied on
Taxable Property in any Fiscal Year determined in accordance with Section C below.
“Multi-Family Property” means, in any Fiscal Year, all Parcels of Developed Property for
which a building permit was issued for construction of a residential structure that (i) is located
within a mobile home park, or (ii) consists of two or more residential units that share common
walls, including duplex, triplex and fourplex units, townhomes, condominiums and apartment
CCC CFD No. 2007-1 3 July 2, 2007
units. Multi-Family Property excludes residential second units established pursuant to Section
82-24 of the Zoning Ordinance Code.
“Other Property” means, in any Fiscal Year, all Parcels of Developed Property that are not
Agricultural Property, Single Family Property, or Multi-Family Property.
“Parcel” see definition of Assessor’s Parcel.
“Parcel Square Foot” or “Parcel Square Footage” means, for Agricultural Property and
Single Family Property, the square footage assigned to a Parcel as determined by the County
Public Works Department based on information from the Assessor’s Parcel map.
“PSWMF” means any permanent stormwater management facility for treatment and/or flood
control, as determined by the County Public Works Department, located within the boundaries of
CFD No. 2007-1.
“PSWMF Service Area” means an area within a Tax Zone, as determined by the County Public
Works Department, that is comprised of one or more Parcels that are served by a specific
PSWMF.
“Public Property” means any property within the boundaries of CFD No. 2007-1 that is owned
or irrevocable offered for dedication to the federal government, State of California, County, or
other local governments or public agencies.
“RMA” means this Rate and Method of Apportionment of Special Tax.
“Single Family Property” means, in any Fiscal Year, all Parcels of Developed Property for
which a building permit was issued for construction of a single family residential unit that does
not share a common wall with another unit, except for attached residential second units
established pursuant to Section 82-24 of the Zoning Ordinance Code. A Parcel of Single Family
Property with an attached residential second unit established pursuant to Section 82-24 will be
taxed as one Parcel of Single Family Property pursuant to this RMA. Excepted from
classification as Single Family Property are Parcels of Agricultural Property and Parcels for
which the single family residential use is not the primary use.
“Special Taxes” means, collectively, the Tier 1 Special Tax and Tier 2 Special Tax.
“Taxable Property” means all Assessors’ Parcels within the boundaries of CFD No. 2007-1 that
are not exempt from the Special Tax pursuant to law or Section E below.
“Taxable Public Property” means, in any Fiscal Year, all Assessors’ Parcels in CFD
No. 2007-1 that had, in prior Fiscal Years, been taxed as Developed Property and subsequently
have come under the ownership of a public agency.
CCC CFD No. 2007-1 4 July 2, 2007
“Tax Zone” means one of the mutually exclusive tax zones identified in Attachment 2 of this
RMA. Attachment 2 will be updated to include new Tax Zones or new Parcels added to CFD
No. 2007-1 as a result of future annexations to the CFD.
“Tier 1 Special Tax” means a special tax levied in any Fiscal Year to pay the Tier 1 Special Tax
Requirement.
“Tier 1 Special Tax Requirement” means the amount for each separate Tax Zone in CFD
No. 2007-1 necessary in any Fiscal Year to (i) pay for Authorized Tier 1 Services, (ii) pay
Administrative Expenses for the Fiscal Year, (iii) cure any delinquencies in the payment of Tier
1 Special Taxes levied in prior Fiscal Years or (based on delinquencies in the payment of Tier 1
Special Taxes which have already taken place) are expected to occur in the current Fiscal Year,
and (iv) to create or replenish reserve funds.
“Tier 2 Special Tax” means a special tax levied in any Fiscal Year to pay the Tier 2 Special Tax
Requirement.
“Tier 2 Special Tax Requirement” means, for any PSWMF Service Area within a Tax Zone,
that amount necessary in any Fiscal Year to (i) pay for Authorized Tier 2 Services, (ii) pay
Administrative Expenses that have not been included in the Tier 1 Special Tax Requirement, (iii)
cure any delinquencies in the payment of Tier 2 Special Taxes levied in prior Fiscal Years or
(based on delinquencies in the payment of Tier 2 Special Taxes which have already taken place)
are expected to occur in the current Fiscal Year, and (iv) to create or replenish reserve funds.
“Unit” means (i) for Single Family Property, an individual single-family unit, (ii) for Multi-
Family Property, an individual residential unit within a duplex, triplex, fourplex, townhome,
condominium, apartment structure, or mobile home park.
“Unit Square Foot” or “Unit Square Footage” means, for Multi-Family Property, the square
footage assigned to a Parcel as determined by the County Public Works Department, based on
information from the Assessor’s Parcel map, divided by the number of Units on that Parcel.
B. DATA COLLECTION FOR ANNUAL TAX LEVY
Each Fiscal Year, the Administrator shall identify the current Assessor’s Parcel numbers for all
Parcels of Developed Property within CFD No. 2007-1 and shall determine within which Tax
Zone each Assessor’s Parcel is located. Upon each annexation of property into CFD No. 2007-1,
the Administrator shall update Attachment 2 of this RMA to include each new Parcel that is
annexed into an existing Tax Zone or, if a new Tax Zone is created, each new Tax Zone and the
Assessor’s Parcel(s) included in the Tax Zone. If a new Tax Zone is created, the Administrator
shall update Attachment 1 of this RMA to include the Maximum Special Taxes for that Tax
Zone. The Administrator shall also determine: (i) whether each Assessor’s Parcel of Developed
Property is Agricultural Property, Single Family Property, Multi-Family Property, or Other
Property, (ii) for Parcels of Agricultural Property and Single Family Property, the Parcel Square
Footage of each Parcel, (ii) for Parcels of Multi-Family Property, the number of Units, the total
CCC CFD No. 2007-1 5 July 2, 2007
square footage of each Parcel, and the Unit Square Footage of each Unit, and (iii) for Other
Property, the Impervious Square Footage of each Parcel. For Multi-Family Property, the number
of Units shall be determined by referencing the development plan for the property or other
County development records. Finally, the Administrator shall also determine the Tier 1 Special
Tax Requirement for each Tax Zone.
The Administrator shall, on an ongoing basis, coordinate with County staff to determine whether
a Tier 2 Special Tax levy will be required for any PSWMF Service Area. If such a levy is
required, the Administrator shall determine the Tier 2 Special Tax Requirement for the PSWMF
Service Area subject to the Tier 2 Special Tax levy. The Administrator shall also determine the
current Assessor’s Parcel number, the Parcel Square Footage of all Parcels of Agricultural
Property and Single Family Property, the Unit Square Footage of all Parcels of Multi-Family
Property, and the Impervious Square Footage of all Parcels of Other Property in the PSWMF
Service Area subject to the levy.
In any Fiscal Year, if it is determined that (i) a parcel map for a portion of property in CFD
No. 2007-1 was recorded after January 1 of the prior Fiscal Year (or any other date after which
the Assessor will not incorporate the newly-created Parcels into the then current tax roll), (ii)
because of the date the parcel map was recorded, the Assessor does not yet recognize the new
Parcels created by the parcel map, and (iii) one or more of the newly-created Parcels meets the
definition of Developed Property, the Administrator shall calculate the Special Tax for the
property affected by recordation of the parcel map by determining the Special Tax that applies
separately to each newly-created Parcel, then applying the sum of the individual Special Taxes to
the Parcel that was subdivided by recordation of the parcel map.
C. MAXIMUM SPECIAL TAXES
The Maximum Special Tax rates for each Tax Zone are shown in Attachment 1 of this RMA.
The Maximum Special Taxes for a Parcel of Taxable Property shall be determined by the
following:
1. Agricultural Property or Single Family Property
The Maximum Special Taxes for a Parcel of Agricultural Property or Single Family Property is
the sum of the applicable Maximum Tier 1 Special Tax and the Maximum Tier 2 Special Tax
rates shown in Attachment 1 of this RMA for the Tax Zone and the then current Fiscal Year.
2. Multi-Family Property
The Maximum Special Taxes for a Parcel of Multi-Family Property is the sum of (i) the number
of Units on the Parcel multiplied by the applicable Maximum Tier 1 Special Tax rate for such
Parcel, and (ii) the number of Units on the Parcel multiplied by the applicable Maximum Tier 2
Special Tax rate for such Parcel, as shown in Attachment 1 of this RMA for the Tax Zone and
the then current Fiscal Year.
CCC CFD No. 2007-1 6 July 2, 2007
3. Other Property
The Maximum Special Taxes for a Parcel of Other Property is the sum of the Maximum Tier 1
Special Tax and Maximum Tier 2 Special Tax for such Parcel. The Maximum Tier 1 Special
Tax for such Parcel is the sum of: (i) the base Maximum Tier 1 Special Tax for the Tax Zone,
and (ii) the incremental Maximum Tier 1 Special Tax multiplied by the Parcel’s Impervious
Square Footage for the Tax Zone, as shown in Attachment 1 of this RMA. The Maximum Tier 2
Special Tax for such Parcel is the sum of: (i) the base Maximum Tier 2 Special Tax for the Tax
Zone, and (ii) the incremental Maximum Tier 2 Special Tax multiplied by the Parcel’s
Impervious Square Footage for the Tax Zone, as shown in Attachment 1 of this RMA.
D. METHOD OF LEVY AND MANNER OF COLLECTION OF THE SPECIAL
TAXES
The Special Taxes shall be levied and collected according to the methodology outlined below:
1. Tier 1 Special Tax
For each Tax Zone, the Tier 1 Special Tax shall be levied as follows until the amount of the levy
equals the Tier 1 Special Tax Requirement for that Tax Zone.
Step 1: The Tier 1 Special Tax shall be levied proportionately on each Parcel of
Developed Property that is not Taxable Public Property up to 100% of the
Maximum Tier 1 Special Tax for that Tax Zone, as shown in Attachment 1 of
this RMA, until the amount levied is equal to the Tier 1 Special Tax
Requirement for the Tax Zone.
Step 2: If additional revenue is needed after Step 2, the Tier 1 Special Tax shall be
levied proportionately on each Parcel of Taxable Public Property up to 100%
of the Maximum Tier 1 Special Tax that had applied to the Parcel prior to the
Parcel becoming Taxable Public Property, until the amount levied is equal to
the Tier 1 Special Tax Requirement for the Tax Zone.
The Tier 1 Special Tax for CFD No. 2007-1 shall be collected in the same manner and at the
same time as ordinary ad valorem property taxes, provided, however, that the County may bill
directly, collect at a different time or in a different manner.
2. Tier 2 Special Tax
For any PSWMF Service Area in a Tax Zone, the Tier 2 Special Tax, if applicable, shall be
levied as follows until the amount of the levy equals the Tier 2 Special Tax Requirement for that
PSWMF Service Area.
Step 1: The Tier 2 Special Tax shall be levied proportionately on each Parcel of
Developed Property that is not Taxable Public Property up to 100% of the
CCC CFD No. 2007-1 7 July 2, 2007
Maximum Tier 2 Special Tax for that Tax Zone, as shown in Attachment 1 of
this RMA, until the amount levied is equal to the Tier 2 Special Tax
Requirement for the PSWMF Service Area.
Step 2: If additional revenue is needed after Step 1, the Tier 2 Special Tax shall be
levied proportionately on each Parcel of Taxable Public Property up to 100%
of the Maximum Tier 2 Special Tax that had applied to the Parcel prior to the
Parcel becoming Taxable Public Property, until the amount levied is equal to
the Tier 2 Special Tax Requirement for the PSWMF Service Area.
The Tier 2 Special Tax for CFD No. 2007-1 shall be billed directly to the property owner(s)
within a PSWMF Service Area on an as needed basis.
E. LIMITATIONS
Notwithstanding any other provision of this RMA, no Special Tax shall be levied on Public
Property that is not Taxable Public Property or property owned by a homeowner’s or property
owner’s association.
F. INTERPRETATION OF SPECIAL TAX FORMULA
The County reserves the right to make minor administrative and technical changes to this
document that do not materially affect the rate and method of apportioning Special Taxes. In
addition, the interpretation and application of any section of this document shall be left to the
County’s discretion. Interpretations may be made by the County by resolution of the Board of
Supervisors for purposes of clarifying any vagueness or ambiguity in this RMA.
G. APPEAL OF SPECIAL TAX LEVY
Any property owner claiming that the amount or application of the Special Tax is not correct
may file a written notice of appeal with the Administrator not later than one calendar year after
having paid the Special Tax that is disputed. The Administrator shall promptly review the
appeal, and if necessary, meet with the property owner, consider written and oral evidence
regarding the amount of the Special Tax, and decide the appeal. If the property owner disagrees
with the Administrator’s decision relative to the appeal, the owner may then file a written appeal
with the Board of Supervisors whose subsequent decision shall be binding. If the decision of the
Administrator (if the appeal is not filed with the Board of Supervisors) or the Board of
Supervisors (if the appeal is filed with the Board of Supervisors) requires the Special Tax to be
modified or changed in favor of the property owner, no cash refund shall be made for prior
years’ Special Tax levies, but an adjustment shall be made to the next Special Tax levy. This
procedure shall be exclusive and its exhaustion by any property owner shall be a condition
precedent to any legal action by such owner.
Agricultural Property N/A $564.17 per Parcel $9,378.63 per Parcel $9,942.80 per Parcel
Less than 5,000 Parcel Sq.Ft. $349.88 per Parcel $5,816.32 per Parcel $6,166.20 per Parcel
5,000 TO 5,999 Parcel Sq.Ft. $355.79 per Parcel $5,914.56 per Parcel $6,270.35 per Parcel
6,000 TO 6,999 Parcel Sq.Ft. $362.20 per Parcel $6,021.17 per Parcel $6,383.37 per Parcel
7,000 TO 7,999 Parcel Sq.Ft. $368.14 per Parcel $6,119.97 per Parcel $6,488.11 per Parcel
8,000 TO 9,999 Parcel Sq.Ft. $376.54 per Parcel $6,259.51 per Parcel $6,636.05 per Parcel
10,000 TO 13,999 Parcel Sq.Ft. $394.30 per Parcel $6,554.79 per Parcel $6,949.09 per Parcel
14,000 TO 19,999 Parcel Sq.Ft. $422.94 per Parcel $7,030.92 per Parcel $7,453.86 per Parcel
20,000 TO 29,999 Parcel Sq.Ft. $465.89 per Parcel $7,744.83 per Parcel $8,210.72 per Parcel
30,000 TO 39,999 Parcel Sq.Ft. $516.76 per Parcel $8,590.48 per Parcel $9,107.24 per Parcel
Greater than or Equal to
40,000 Parcel Sq.Ft.$564.17 per Parcel $9,378.63 per Parcel $9,942.80 per Parcel
Less than 2,500 Unit Sq.Ft. $267.61 per Unit $4,448.77 per Unit $4,716.38 per Unit
2,500 TO 2,999 Unit Sq.Ft. $269.85 per Unit $4,486.17 per Unit $4,756.02 per Unit
3,000 TO 3,999 Unit Sq.Ft. $279.27 per Unit $4,642.46 per Unit $4,921.73 per Unit
4,000 TO 4,999 Unit Sq.Ft. $291.12 per Unit $4,839.50 per Unit $5,130.62 per Unit
5,000 TO 5,999 Unit Sq.Ft. $303.44 per Unit $5,044.35 per Unit $5,347.79 per Unit
6,000 TO 6,999 Unit Sq.Ft. $315.80 per Unit $5,249.76 per Unit $5,565.56 per Unit
7,000 TO 7,999 Unit Sq.Ft. $327.65 per Unit $5,446.80 per Unit $5,774.45 per Unit
Greater than or Equal to
8,000 Unit Sq.Ft.$333.59 per Unit $5,545.60 per Unit $5,879.19 per Unit
Maximum Special Taxes for Tax Zone 11
Attachment 1
County of Contra Costa
Community Facilities District No. 2007-1
(Stormwater Facility Maintenance)
For Agricultural Property, Single Family Property, and Multi-Family Property
Type of Property Square Footage (Sq.Ft.)
Maximum
Tier 1
Special Tax
Maximum Special Taxes for FY 2007-082
Maximum
Special
Taxes
2Beginning in January 2008, and each January thereafter, the Maximum Special Taxes shown in this Attachment 1 shall be adjusted by applying the greater
of (i) the increase, if any, in the Local Consumer Price Index (CPI) for the San Francisco-Oakland-San Jose Area for All Urban Consumers that had
occurred since January of the prior year, or (ii) the increase, if any, in the Engineering News Record’s Common Labor Index that had occurred since
January of the prior year. Each annual adjustment of the Maximum Special Taxes shall be come effective on the following July 1.
Maximum
Tier 2
Special Tax
1Tax Zones that are added to CFD No. 2007-1 as a result of future annexations will have their Maximum Special Taxes determined during the annexation
process. This Attachment 1 shall be updated to reflect each new annexation.
Multi-Family Property
Single Family Property
Base
Maximum Tier 1
Special Tax
(per Parcel)
Incremental
Maximum Tier 1
Special Tax
(per Impervious
Square Foot)
Base
Maximum Tier 2
Special Tax
(per Parcel)
Incremental
Maximum Tier 2
Special Tax
(per Impervious
Square Foot)
Base
Maximum
Special Taxes
(per Parcel)
Incremental
Maximum
Special Taxes
(per Impervious
Square Foot)
$275.00 $0.02 $5,600.00 $0.12 $5,875.00 $0.14
Maximum Special Taxes for Tax Zone 11
For Other Property
Maximum Special Taxes
Attachment 1 Cont.
County of Contra Costa
Community Facilities District No. 2007-1
(Stormwater Facility Maintenance)
Maximum Tier 1 Special Tax
Maximum Special Taxes for FY 2007-082
1Tax Zones that are added to CFD No. 2007-1 as a result of future annexations will have their Maximum Special Taxes determined during
the annexation process. This Attachment 1 shall be updated to reflect each new annexation.
2Beginning in January 2008, and each January thereafter, the Maximum Special Taxes shown in this Attachment 1 shall be adjusted by
applying the greater of (i) the increase, if any, in the Local Consumer Price Index (CPI) for the San Francisco-Oakland-San Jose Area for
All Urban Consumers that had occurred since January of the prior year, or (ii) the increase, if any, in the Engineering News Record’s
Common Labor Index that had occurred since January of the prior year. Each annual adjustment of the Maximum Special Taxes shall be
come effective on the following July 1.
Maximum Tier 2 Special Tax
1 098-180-027
098-180-030
1The property identified by the Assessor’s Parcel numbers listed above shall remain part o
the identified Tax Zone regardless of changes in the configuration of the Assessor’s Parcels or
changes to APNs in future Fiscal Years. This Attachment 2 shall be updated to reflect Parcel
that are added to a Tax Zone or Tax Zones that are added to CFD No. 2007-1 as a result o
future annextions.
Identification of Tax Zones
Tax Zone Assessor's Parcels Included in Tax Zone1
Attachment 2
County of Contra Costa
Community Facilities District No. 2007-1
(Stormwater Facility Maintenance)
APPENDIX D
Boundary Map of
Community Facilities District No. 2007-1
APPENDIX E
Assessor’s Parcel Maps for
Fiscal Year 2024-25
PURPOSES ONLY. NO LIABILITY IS ASSUMED
FOR THE ACCURACY OF THE INFORMATION
NOTE: THIS MAP WAS PREPARED FOR ASSESSMENT
DELINEATED HEREON. ASSESSOR'S PARCELS
OR BUILDING SITE ORDINANCES.
MAY NOT COMPLY WITH LOCAL LOT SPLIT
01
08
07
06
05
27
03
040
3
P.B.
5 5
44 45
43
12
29
27 28
59 60 61
68
50
18 19 23 24 25 36
4142
58
63
57
62
09
49
48
46
32
64
67
5.01
N01
°11'15
"E
140.95 115.95
N89°10'55"W
403'
N01°11'15
"E
18
7
.50'
18
7
.50
'
N89°18'35"W
N01
°11'15
"E
286.00
183'9515'
286.90
S01°15
'E
N.D.
N89°10'55"W 665.69
665.69
N89°10'55"W
325.07
325.07
N.D.
N00
°49
'05
"E
N00
°49
'05
"E
10
3
7
.25
S89°10'55"E
108
200
20
0
108
19
5
.0
S00°49
'05"W 316.42 369.67
S89°10'55"E
369.67
73
7
.09
12
3
2
.26
N01
°02'40
"E
12
3
2.26
N01
°02
'40
"E
369.67
1378.87S89°10'55"E
369.67639.53
95
0.07
N00°15
'W
1373.79 S89°45'W
62.5
260
95
0
.07
N89°25'24"W
160'
80'69
0.10
42
9.97
43
0
.10
42
9.84
40
8
.54
690
.21
62.50
80'80'477'
699.50
152.0 185.0
47
2
.00
47
2
.00
N00
°35
'10
"E
N00
°35
'10
"E
N00
°35'10"E
N00
°35
'10
"E
N00
°35
'10
"E
152.0 185.0 152.0'152.0'152.0'
793.0N89°31'20"W
179.11
N00
°18
'05"E
27
5
'
158.41 316.81
13
7
.5
13
7
.5
13
7
.5
13
7
.5158.41
27
5
.0
N00
°18
'05
"E
N00
°18'05"E
27
6
.97
N89°35'13"W
S89°31'20"E
494.15
275
.87
818.64
699.50
60
6
.86
12
97
.87
27
5
'
N89°31'20"W
495.52
970.74(T)
N00°35'10
"E
275'
152.0'152.0'152.0'
S89°31'20"E 637.54
181.3
N01°02'40"E
1232
.26
67
5
.00
661.37 325.07
S89°10'55"E
"B""C"
"A"
5 5
3
3
BY
RO
N
HIGHW
AY
84
"B""C"
3
"A"
3
9
96
"A"
.50Ac
9
226 OR 58 2-8-30
BYER
ROAD
"B""C"
9
7 7 4
8
"A"
"D"
30' TO C.C.CO.
"C"
"C"
30' DED TO CO.
8
4
11
"A""A""B""B""D""C"
POR. "A"
.43Ac
1.13Ac.
30
' DED. TO CO.
8
8
E
S
551
.66
4
1.0Ac
4 4
CO. 109 D 530
2/24/05RD
2
1717
.99Ac
.79Ac
CAMINO DIABLO
867.80
N
9
407D 10 11/18/21
11/18/21
34
1
D111
27.90Ac
40
7
D11
L
341D111
HOSIE AVE
3
1-3/10/72
8/27/73
3-11/30/78
4-10/20/83
5-
6-10/30/85
7-3/24/88
8-6/1/93
9-1/14/94
1"=400'
33' R/W TO B.B.I.D.
380.79
'
38
0
.53
'
140.95'115.95'
N0°18
'5"E
"A"
N0°34
'36
"E
.79Ac
CO
LETA'S W
AY
6.15Ac
969.37
968.0
1.0Ac
1.65Ac 2.0Ac
1.54Ac 1.54Ac 1.54Ac 1.83Ac
47
2
.0
44
2
.0
442.0
44
2
.0
44
2
.0
2 SEC 3 T1S R3E MDB&MPOR S 1/
21PM14
8/28/85
29PM37
72PM28
107PM45
118PM5
119PM21
87LSM19
2-
162PM10
163PM49
16.69Ac
10.28Ac 5.04Ac
65 6645
3
.23
S0°46
'25
"W
N89°6'53"W
816.03 848.94
1664.97
55
1
.66
739.03
848.93
10-196PM16 4/13/06
10
10
10
10
"A"
"B""C"
10.35Ac 10.75Ac
28.18Ac
35
' ACCESS
EASE
N89°6'53"W
N89°10'55"W 1661.46
5' DEDICATED TO COUNTY
(.19Ac)
.98Ac220.0
220.0
19
5
.0
10.46Ac 10.46Ac
20' DRAIN EASE
5' DED TO CCC
ASSESSOR'S MAP
CONTRA COSTA COUNTY,CALIF.
BOOK PAGE2 4
69
500
.0
250.0
67
2.10Ac
C 24' R/W BYRON-BETHANY IRRIG DIST
BYRON
-BET
HANY
IRR
IG DIST
18.266Ac
5.0Ac
3.12Ac
1.23Ac 1.01Ac
2.84Ac
1.50Ac
1.11Ac
250.0
ND ND
ND
N LN SE 1/4 OF SW 1/ 4
30
' DED TO CC
C
25
' DED TO CC
C
38
1
.10
FM MID SEC
1.00Ac
69
040
2/6/17
"B"
316.81
ASSESSOR'S MAP
CONTRA COSTA COUNTY,CALIF.
BOOK PAGE4 1
CANAL
GRANGERS
INDIAN SLOUGH
CANAL
CANAL
CANAL
DREDGER CUT
DREDGER CUT
23
BK 11
24
BK 11
15
P.B.
03
38
04
24
02 04
07
010
010
5/21/64FM PG. 23-25 OF 009
132
N89°15'E
1729.86
874.5N60°45'W
S60°45'E778.14
2110
643.5
442.2
S30°30'E
N30°30'W
459.36
66
199.98
N32°58'W
341.88 111.54
S32°49'38"W S14°18'W
50.16
200
43.56
41.58
569.6
N35°25'W
S82°W
13.02Ac.
N70°48'E
1319.34
N74°02'E
141.24 207.9
N79°55'E N82°56'E
165.66
N85°31'E
1215.42
(1240.80)
306.04
(302.03)
174.74
99.25
N
2947.57
(2950.20)
50'
3.38Ac.
16.64Ac.
1181 OR 133
3/16/48
21.63Ac.
3374.3
103D389
PCL.2
20.0Ac.
2/27/04
165
460
210
N20°W 103 D 389
PCL. 1
10.59Ac.
2/27/04
S65°05'E1953.6
23 24
2526
199.98
2640
N
POR. SEC. 23 & 24 T1N R3E M.D.B.&M.
FM 009-28
1"=400'
5280
2640
1182 OR 365
AMS 10-21-99
PURPOSES ONLY. NO LIABILITY IS ASSUMED
FOR THE ACCURACY OF THE INFORMATION
NOTE: THIS MAP WAS PREPARED FOR ASSESSMENT
DELINEATED HEREON. ASSESSOR'S PARCELS
OR BUILDING SITE ORDINANCES.
MAY NOT COMPLY WITH LOCAL LOT SPLIT
N38°13'1"E
223.4
203.50
209.8
N89°00'W
S1°00'W
S
ND
1320.0
STA. POST
90 D
U.S. 3
09
08
19.39Ac
20.383Ac
CODE LINE
180.0
N88°59'27"W
N88°59'27"W
180.57
56
56
149.26
94.81
144.58
R=176
R=100
49.7
R=32
R=200
214.91
296.78
R=330
313.87
R=145
119.69
R=130
249.68R=170
R=120
221.84
98.01
R=100
R=320
307
158.29
R=180
R=135
121.6
57
997.37
1193.05
S1°0'30"W
N65°05'W
POINT OF TIMBER RD
145.08
87.84
S11°55'15"E
204.6
S15°11'45"W
457.38
153.51
115.19
PG 23
SEE BK 11
745.99
56
S1°0'5"W
336.02
R=200
98.48
R=140
180.056
N88°59'27"W
90.0
PG 23
TO BK 11
11
4.840Ac
(4/14/23)
"J"
POR TR 9591 MB 553-391-
1
1
1
4
P.B.
7/2/23
11
N57°22'39"E 124.31S64°8'21"E
N77°49'39"E
S30°26'27"E
S80°32'21"E
N89°3'39"E
59.01
S32°49'38"W
S0°E
81.03
S82°20'39"W
125.27
N36°47'33"EN50°12'21"W
354.85S83°36'39"W N6°23'21"W
314.5
S83°36'39"W
60.5
75.02
113.29
72.49
264.09
APN 004-510-014
PCL H DETAIL SEE
FOR TR 9591
ASSESSOR'S MAP
CONTRA COSTA COUNTY,CALIF.
BOOK PAGE4 3
DISCOVERY
POINT
KELLOGG
CREEK
LIDO
BAY
INDIAN SLOUGH
270.06
212.96
189.05
166.4467.42
5.88
57.10
N32°36'09"W
N70°55'07"E
N73°22'77"E
52.68
70.93
56
56
N36°03'09"W
N39°30'09"W
70.42
67.87
65.93312.11
NDN.D.
N.D.
ND.
NDND
N8°W
18.81
N33°30'07"E
N32°49'38"E
N14°18'E
N82°E
148.55
ND.
N19°12'W
27.72
264
239.58
N37°34'30"E
N12°34'30"W
ND.
ND
674.41
N42°27'30"W
130.07
22.45 41.42
63.50
44.11N30°03'22"E
123.05
125.2319.33
63.39
63.59
N63°39'09"WN60°12'09"WN56°45'09"W
122.96
56
56
56
56
56
40.48
23.98
126.35
135.04
122.74
R=930
N53°18'09"WN49°51'09"WN46°24'09"W
60
60
60
56
56
N42°57'04"W
120
120
120
N56°55'07"WN52°58'02"WN49°00'57"W 51.72
51.73
61.72
61.72
120
120
120
71.60
71.60
60
60
N45°03'52"WN43°32'12"WN39°35'07"W
51.72
51.73
120
120
N31°40'57"W
N35°38'02"W
R=750
51.72
51.72
51.72
51.73
51.73
51.73
120
120
120
120
120
120
51.73
N60°52'12"W
N64°49'17"W
N68°46'22"W
N72°43'27"W
N76°40'32"W
N80°37'37"W
60
60
60
60
60
60
R=870
56
56
56
57.01 24.82 45.44
R=370
138.47
135.61
142.44
138.49
130.19
64.61
41.74
23.77 65.88
147.78
N65°06'09"W
N70°33'09"W
N74°00'09"W
N77°30'54"W
N75°06'23"W
134.06
N28°33'12"E
63
16.53
48.17
65.22
140.12
106.18
83.44
43.68
86.02R=310
N16°55'54"E R=440 40.14
N4°00'53"E
N8°17'27"E
N18°40'12"E
26.73
204.60
N4°39'30"W
N14°32'30"E
N16°03'32"E
N27°13'36"W
139.38
26.27
55.01
52.48
R=230
143.74
132.45N76°17'15"W
N89°22'18"E
200.13
N79°45'25"E
6060
51.72 51.72
120
120
120
N87°31'08"E
N88°31'42"W
N84°34'42"W
010203
04
05
06
07
08
09
10
11
16
17
14
15
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
60
64
02
01
36
031
032
11
06
07
62
1
2
3
4
5
6
7
8
9
10
11 12
13 14
15
16
17 18
1718
19
20
21
22
2324
25
26
27
28
29
30
31
.04Ac.
B
B
.12Ac.
.004Ac.
P-23
PB11
66' R/W (101 D 321)
1.27Ac.
A
A
B
B
SCA.EASM'T
A
A
TRACT 4077
TRACT 5811
A-1975 ROLL
B-1981 ROLL MB 236-4
4-5-71FM 11-29
031
032
(DISCOVERY BAY NO 3) MB 170-37
1"=100'
AMS 10-21-99
65
52.48
52.49
66.89
46.22
133.08
N85°19'2"W
5-15-89FM 9-37
04
AMENDED MAP
POR SEC 23 T1N R3E
SCA.EASM'T
PURPOSES ONLY. NO LIABILITY IS ASSUMED
FOR THE ACCURACY OF THE INFORMATION
NOTE: THIS MAP WAS PREPARED FOR ASSESSMENT
DELINEATED HEREON. ASSESSOR'S PARCELS
OR BUILDING SITE ORDINANCES.
MAY NOT COMPLY WITH LOCAL LOT SPLIT
01
004-010-011
TO PCL
4/14/23
553M39
TR 9591
8/1/23
TR 9591
TO PG 1
PURPOSES ONLY. NO LIABILITY IS ASSUMED
FOR THE ACCURACY OF THE INFORMATION
NOTE: THIS MAP WAS PREPARED FOR ASSESSMENT
DELINEATED HEREON. ASSESSOR'S PARCELS
OR BUILDING SITE ORDINANCES.
MAY NOT COMPLY WITH LOCAL LOT SPLIT
STA. POST 90 D 1432.13
ND
RO
AD
ND
1320.0
U.S. 5
ND
U.S. 6
IRRIGATION
16.121Ac
ND
CODE
LINE
CODE LINE
8.541Ac
6.919Ac
ND
1129.67
S47°37'44"W
243.58
110
120
ND
420.0
360.0
496.37
R=158
120
120
1"=200'
ASSESSOR'S MAP
CONTRA COSTA COUNTY,CALIF.
BOOK PAGE4 51
FM. BK. 11 07-22-22
CANAL
POR SEC 26 T1N R3E MD&M
01
03
04
05
6.357Ac
26
PO
INT O
F TIM
BER
N15°42'6"E
S74°17'54"ES74°17'54"E
180.0
S88°59'27"E
S15°42'6"W
S15°42'6"W
56
56
S88°59'27"E
180.57
2616.32(T)N1°0'40"E
69.68
S43°3'49"E
S43°3'49"E
496.37
R=158
CODE
LINE
N16°14'17"E 1327.54(T)
68.48
110
N74°17'54"W
58.11 104.84
R=264
109.97
120
60.02
120
S43°3'49"E
S43°3'49"E
56
56
56
180.0
180.0
95
110
80.96
S88°59'27"E
S88°59'27"E
S88°59'27"E
180.0
06
33.009Ac
11
BK
11
BK
8
BK
11
12
09
10
POR "C"
POR "C"
"J"
"I"
8/1/23
POR TR 9527
"A"
"K"
08
13
52
53
MB 553-281-(4/14/23)
1
1
1
1
1
1
1
1
2.500Ac
20.730Ac
1.850Ac
1.560Ac
.370Ac
.200Ac
TR. 9527
M.B. 553-28
4-14-23
14
"H"
2-
70.4
(APN 004-510-014)
SEE DETAIL A
DETAIL A
DETAIL A
SCALE 1"=400'
SCALE 1"=400'
55
TR. 9591
4-14-23
M.B. 553-39
7.780Ac
56
510 14
POR TR 9591 (4/14/23)MB 553-39
2
TR. 9591
1"=100'
53
PURPOSES ONLY. NO LIABILITY IS ASSUMED
FOR THE ACCURACY OF THE INFORMATION
NOTE: THIS MAP WAS PREPARED FOR ASSESSMENT
DELINEATED HEREON. ASSESSOR'S PARCELS
OR BUILDING SITE ORDINANCES.
MAY NOT COMPLY WITH LOCAL LOT SPLIT
2024 ROLL-POR TR 9527 M.B. 553-28
ASSESSOR'S MAP
CONTRA COSTA COUNTY,CALIF.
BOOK PAGE4 52
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
"B"
ORWELL DR
18
19
20
21
22
"D"
"E"
33
34
35
36
37
38
39
40
41
42
43
44
45
23
24
25
26
27
FM. PG. 51 7-2-23
11
BK
BRADBURY
DR
BRADBURY
W
AY
51
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
N43°3'49"W
N43°3'49"W110
110
110
110
110
110
110
110.07
N43°3'49"W
N43°3'49"W
N43°3'49"W
N46°56'11"E
300
60
60
60
60
60
60
N46°56'11"E
412
56.40
N36°13'16"W
6,600SF
6,600SF
6,600SF
6,600SF
6,600SF
6,605SF
52
8
60
60
60
60
60
60
6,600SF
45.28
14.72
60
60
60
60
60
60
60
60
60
60
60
60
60
84.61
79.27
110
110
110
110
110
110
110
N33°47'52"W
119.68N24°23'27"W
143.80
N43°3'49"W
N43°3'49"W
N46°56'11"E
405.28
N46°56'11"E
619.42
6,600SF
6,600SF
6,600SF
6,600SF
6,600SF
6,601SF
7,938SF
9,300SF
6,600SF
R=348
267.70
60.69
60.58
R=292
224.62
N47°6'16"E
60N88°59'21"W
105
105
105
105
105
105
105
105
105
N88°59'21"W
56.89
N88°59'21"W
N88°59'21"W
N88°59'21"W
N88°59'21"W
5.96 R=55
243.57
25.74 54.83
45.20
140.91
N82°45'46"W
59.53
146.77
110.93
N47°30'4"E
407.89
35.54
71.19
24.25
53.56
30.99
130.40
148.83
2616.32
N1°0'40"E
60
60
60
60
60
60
60
60
33.73
60
60
60
60
60
60
60
6,300SF
6,300SF
6,300SF
6,300SF
6,300SF
6,300SF
6,348SF
17,561SF
N11°6'7"W
191.01
58.13
99.97
91.04
N88°59'21"W 120.98
80
N1°0'39"E
153.73
73.73
73.57
16.98
15.71
10,192SF
10,548SF
12,778SF
N1°0'39"E
69.28
15.71
R=10
16.98
73.81
142.81
49.65
N74°56'10"E
132.78
N1°0'39"E 11,484SF
N88°59'21"W 100
N88°59'21"W 100
6,000SF
7,682SF
60 60
70
100
100
100
100
100
N88°59'21"W
N88°59'21"W
N88°59'21"W
60
60
60
60
60
60
60
60
60
60
N1°0'39"E
N1°0'39"E
6,000SF
6,000SF
6,000SF
6,000SF
6,000SF
N88°59'21"W
N88°59'21"W
N88°59'21"W
105
105
105
105
105
60
60
60
60
60
60
60
60
60
60
6,300SF
6,300SF
6,300SF
6,300SF
6,300SF
6,300SF
N1°0'39"E
N1°0'39"E
110.31
R=10
520
1"=100'
54
PURPOSES ONLY. NO LIABILITY IS ASSUMED
FOR THE ACCURACY OF THE INFORMATION
NOTE: THIS MAP WAS PREPARED FOR ASSESSMENT
DELINEATED HEREON. ASSESSOR'S PARCELS
OR BUILDING SITE ORDINANCES.
MAY NOT COMPLY WITH LOCAL LOT SPLIT
ASSESSOR'S MAP
CONTRA COSTA COUNTY,CALIF.
BOOK PAGE4 53
2024 ROLL-POR TR 9527 M.B. 553-28
46
28
47484950
29303132"F"
W
ILDE DR
BRADBURY DR
M
ILTO
N C
T
5152535455565758
59
60
61
62
63
64
65
66
7576777879808182838485868788
6768697071727374"G"
89909192PO
INT O
F TIM
BER RD
52
52
FM. PG. 51 7-2-23
54 34 33 32
52 51 50 49
31 30
48 47 46 44
29 28 27 26
25
24
23
22
21
20
19
18
45 43 42
17
41 40 39 38
16 15 14 13 12 11 53
37 36 35 10
05 04 03 02 01
06070809
N1°0'39"E
N1°0'39"E
6,000SF6,000SF6,000SF6,000SF6,000SF
9,072SF
6060
60
606060
6060 6060
100
100
100
100
100
100
90.72
90.72
40' PAE
60606060
6060 6060
N1°0'39"E
N1°0'40"E
105
105
105
105
105
6,000SF 6,000SF 6,000SF 6,000SF
95
N88°58'51"W
15.71
R=10 60.63
70.65
7,396SF
R=10
15.71
N88°59'21"W
N88°59'21"W
N88°59'21"W
N88°59'21"W
N88°59'21"W
N88°59'21"W
N88°59'21"W
N88°58'51"W
95
60 60 60 60 60 60 60 60
70 60 60 60 60 60 60 60100
N88°59'21"W
100
N88°59'21"W
100
100
100
100
100
N88°59'21"W
N88°59'21"W
90
N88°59'21"W
R=1015.71
6,979SF
6,000SF 6,000SF 6,000SF 6,000SF
6,000SF 6,000SF 6,000SF
R=10
15.71
11,528SF
12,015SF
6,991SF
7,800SF
N1°0'39"E
N1°0'39"E
N1°0'39"E 130
R=50 138.68
47.31
45.12
46.26
19.65
60 60
130
60
108.48
168.24
155.95
N63°26'50"E
114.25 N61°10'24"W
114.10
R=158
496.37
N88°59'21"W
120
62.28 62.28 62.28 62.28 62.28 62.28 62.28 62.28 61.79
N88°59'27"W
105
N88°59'27"W
105
105
105
105
105
105
105
105
N88°59'27"W
N88°59'27"W
N88°59'27"W
71.7862.2862.28 62.2862.28 62.2862.28 62.2862.28
7,516SF6,540SF6,540SF 6,540SF6,539SF6,539SF6,539SF
6,539SF 6,539SF
N88°59'21"W
120
40.50
162.24
N1°0'39"E
N1°0'39"E
110.62
N1°0'39"E 130
127.94
50.07
56.50
9.44
10.21
50.07
60
60
70
60
N88°59'21"W
N88°59'21"W
109.93
99.93
109.93
100
N1°0'39"E 480.19
60.19
60606060606060
R=1015.71
15.71
R=10 62.28
72.28
N88°59'27"W
95
105
105
105
105
105
105105
105
N88°59'27"W
N88°59'27"W
N88°59'27"W
N88°59'27"W
62.28 62.28 62.28
62.28
62.28
62.2862.2862.28
62.2862.2862.28 62.28
62.28 62.28 62.2862.28
N1°0'39"E
1120.55
N1°00'40"E
6,539SF6,539SF6,539SF6,539SF6,539SF6,539SF6,539SF6,539SF7,568SF
50.19
90
N88°59'21"W
100
100
100
100
100
100
100
N88°59'21"W
N88°59'21"W
N88°59'21"W
N88°59'21"W
6,000SF6,000SF6,000SF6,000SF6,000SF6,000SF6,000SF5,997SF
6060 6060 6060 60
N1°0'39"E 590.19
7,674SF
6,596SF
11,348SF
6,794SF
7,793SF 150
150
19.65 R=25
9.94
60
51
11
BK
530
1"=100'
57
ASSESSOR'S MAP
CONTRA COSTA COUNTY,CALIF.
BOOK PAGE4 54
2024 ROLL-POR TR 9527 M.B. 553-28 (PANTAGES)
PURPOSES ONLY. NO LIABILITY IS ASSUMED
FOR THE ACCURACY OF THE INFORMATION
NOTE: THIS MAP WAS PREPARED FOR ASSESSMENT
DELINEATED HEREON. ASSESSOR'S PARCELS
OR BUILDING SITE ORDINANCES.
MAY NOT COMPLY WITH LOCAL LOT SPLIT
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118 119
120
121
122
123
124
125
126
127
128 129
130
131
132
133
134
135
136
137
138
139
"H"
FM BK 11 PG 23 7-2-2301
02
03
04
05
06
17
18
19
20
21
22
23
24
25
26
28
27
29
30
07
08
09
31
48
47
46
45
44
32
43
10
42
33
11
12
13
41
14
15
40
34
38
39
35
16
3736
HEMINGWAY LN
HEM
INGW
AY
LN
BRADBURY
DR
BRADBURY
C
T
11
BK
11
BK
6,696SF
6,300SF
6,300SF
6,300SF
6,300SF
6,300SF
6,300SF
1.78Ac
30
60
60
60
60
60
60
60
60
60
60
60
60
60
45.59
N88°59'55"W
105
105
105
105
105
105
105
105
N88°59'55"W
N88°59'55"W
N88°59'55"W
N88°59'55"W
N88°59'27"W 105.14
36.88N62°22'57"W26.39
R=160
298.51
223.38
R=140
75.94
745.99
N1°0'5"E
N88°59'55"W
N88°59'55"W
180
180
90 90
243.57
R=55
197.99
R=20
25.74
N1°0'5"E
900.01
N1°0'5"E
169.03
R=1015.71
15.71
R=10
N88°59'55"W
100
100
100
100
R=10
15.71
100 100
100 100
100 100
100 100
100 100
100 100
100 100
100 100
100 100
90 90
N88°59'55"W N88°59'55"W
N88°59'55"W
N88°59'55"W
N88°59'55"W
N88°59'27"W 180
N88°59'55"W
N88°59'55"W
N88°59'55"W
6,979SF
6,000SF
6,979SF
6,373SF
6,000SF
60
60
60
60
60
N88°59'55"W
100
N88°59'55"W
60
60
60
60
60 6070
N1°0'5"E
60
60
60
60
60
60
60
60
60
60
60
60
60
60
60
60
60
60
60
60
60
60
60
60
S48°43'40"W
23.20
R=66
54.98
103.67
48.70
N1°0'5"E
600.04
N1°0'5"E
1020.01
60
60
60
60
60
60
60
60
60.03
60
100
100
100
100
100
100
90
N88°59'27"W
60
70.05
60
60.04
R=10
15.71
N88°59'55"W
N88°59'55"W
N88°59'55"W
6,000SF
6,000SF
6,000SF
6,000SF
6,000SF
6,000SF
6,000SF
6,000SF
6,983SF
N1°0'5"E
600.03
N1°0'5"E
N1°0'5"E
N1°0'5"E
N1°0'5"E
6,980SF6,979SF
6,000SF
6,000SF
6,000SF
6,000SF
6,000SF
6,000SF
6,000SF
6,000SF
6,000SF
6,000SF
6,000SF
6,000SF
6,000SF
6,000SF
6,000SF
N1°0'5"E
600
15.71
R=10
15.71R=10
7,329SF
6,300SF
6,300SF
6,300SF
6,300SF
6,300SF
6,300SF
6,300SF
6,300SF
60.01
60 60
70
N88°59'27"W
95
105
105
105
105
105
105
105
105
N88°59'55"W
N88°59'55"W
N88°59'55"W
N88°59'55"W
60
60
60
60
60
60
60
60
60
60
60
60
60 60
70.01
540
1"=100'
52
PURPOSES ONLY. NO LIABILITY IS ASSUMED
FOR THE ACCURACY OF THE INFORMATION
NOTE: THIS MAP WAS PREPARED FOR ASSESSMENT
DELINEATED HEREON. ASSESSOR'S PARCELS
OR BUILDING SITE ORDINANCES.
MAY NOT COMPLY WITH LOCAL LOT SPLIT
ASSESSOR'S MAP
CONTRA COSTA COUNTY,CALIF.
BOOK PAGE4 55
FM. PG. 51 7-2-23
550
POR TR 95912024 ROLL-M.B. 553-39 (4-14-23)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
"B"
01
02
03
04
05
06
10
11
12
13
14
15
16
09
17
18
19
20
21
07
08
23
22
"A"
3.191Ac
DETAIL A
SCALE 1"=200'
SEE DETAIL A
(APN 004-550-022)
12,363SF
11,807SF
6,991SF
7,800SF
11,807SF
6,991SF
7,800SF
7,541SF
6,600SF
6,600SF
6,600SF
7,679SF
7,679SF
6,600SF
6,600SF
6,600SF
6,600SF
6,600SF
109.97
N51°32'45"W
60
100
N43°3'49"W
160
R=10
15.71
110
N43°3'49"W
110
110
110
N43°3'49"W
N43°3'49"W
60.02
60
60
N45°21'20"E
N46°56'11"E
120
39.08
R=264
37.28
60
60
60
60
70
60 N46°56'11'E
277.28
130
N46°56'11"E
N46°56'11"E
130
108.48
R=50
235.68
N46°56'11"E46.26
46.46
50.25
60
60
R=10
15.71
60
N46°56'11'E
N43°3'49"W
110
100
N43°3'49"W
160
60
N46°56'11'E
130
70
60
N46°56'11'E
130
N46°56'11'E
108.48
60
60120
N43°3'49"W
R=25
19.65
46.26
R=25
19.65
46.46
N43°3'49"W
120
N14°16'29"W
114.04
N71°51'9"W114.04
165.46
165.46
165.46
R=158
496.37
N43°3'49"W
N36°13'16"W
56.40
110
N53°52'14"W110
110
110
110
110
110
110
110
N43°3'49"W
N43°3'49"W
N43°3'49"W
N43°3'49"W
60
60
60
60
60
60
60
60
60
60
60
60
60
60
60.36
81.11
6,600SF
6,600SF
7,780SF
20,631SF
N74°17'54"W
110
53.85
114.09
53.85
153.31
58.11
104.84
N46°56'11"E
420
R=430
234.41
N46°56'11"E
420
R=320
174.45N15°42'6"E
63.18
243.58
N47°42'40"E
172.52
36.72 35.32
82.37
N36°35'1"E
N48°49'44"E
81.35
41.19
N42°14'39"E
N47°41"E
67.93
N39°55'54"E
15.30
63.36
N29°4'45"E
39.62
37.17
28.99 12.73
24.67
71.05
N9°3'52"E
N19°34'5"E
114.77
63.73
4.20
47.06
27.0327.43
67.40
33.98
58.13
66.50
245.35
N18°5'12"E
19.60
89.21
28.87
48.33
46.93
85.76
75.11
72.23
20.02
46.38
51.39
22.23
37.88
10.98
72.63
61.83
29.26
23.78
64.47
24.99
71.05
24.67
28.99
37.17
39.62
63.36
12.73
172.52
N47°42'40"E
36.72
35.32 82.37
N48°49'44"E
41.19
81.35
N47°41"E
67.93 21.11 15.30
N48°41"E
21.11
N21°58'44"E
N43°30'46"E
N14°14'2"E
N33°14'15"E
N36°34'7"E
THOREAU CT ORWELL DR
51
56
1"=100'
PURPOSES ONLY. NO LIABILITY IS ASSUMED
FOR THE ACCURACY OF THE INFORMATION
NOTE: THIS MAP WAS PREPARED FOR ASSESSMENT
DELINEATED HEREON. ASSESSOR'S PARCELS
OR BUILDING SITE ORDINANCES.
MAY NOT COMPLY WITH LOCAL LOT SPLIT
ASSESSOR'S MAP
CONTRA COSTA COUNTY,CALIF.
BOOK PAGE4 56
560
2024 ROLL-POR TR 9591 M.B. 553-39 (4-14-23)
FM. PG. 51 7-2-23
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
19
20
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
(SEE APN 004-550-022)
(SEE APN 004-510-014)
60
60
60
60
60
60
60
60
60
60
60
60
60
60
60
60
60
60
60
60
60
60
60
60
60
60
60
60
60
60
60
60
110
N74°17'54"W
110
110
110
110
110
N74°17'54"W
N74°17'54"W
N74°17'54"W
110
N74°17'54"W
110
110
110
110
110
110
110
110
110
N74°17'54"W
N74°17'54"W
N74°17'54"W
N74°17'54"W
N15°42'6"E
420
60
60
100
100
110
110
110
110
110
110
110
110
N74°17'54"W
N74°17'54"W
N74°17'54"W
N74°17'54"W
N74°17'54"W
N74°17'54"W
110
N74°17'54"W
110
N74°17'54"W
110
N74°17'54"W
110
N74°17'54"W
110
N74°17'54"W
110
N74°17'54"W
110
110
110
110
110
110
110
110
N15°42'6"E
1254.58
N15°42'6"E
1497.09
6,600SF
6,600SF
6,600SF
6,600SF
6,600SF
6,600SF
6,600SF
6,600SF
6,600SF
6,600SF
6,600SF
6,600SF
6,600SF
6,600SF
6,600SF
6,600SF
6,600SF
6,600SF
6,600SF
6,600SF
6,600SF
6,600SF
70
6,600SF
6,600SF
6,600SF
7,679SF
7,679SF
6,600SF
6,600SF
6,600SF
6,600SF
70
60
60
60
60
60
60
60
60
60
60
60
60
60
60
N15°42'6"E
360
N15°42'6"E
N15°42'6"E
130
130
N15°42'6"E
N15°42'6"E
130
130
60
60
60
60
60
60
N74°17'54"W
N74°17'54"W
120
120
N15°42'6"E
540
N15°42'6"E
480
60
60
60
60
60
60
60
60
60
60
60
60
60
60
60
60
60
60
60
60
60
60
60
60
6,600SF
6,600SF
6,600SF
6,600SF
6,600SF
6,600SF
12,363SF
11,807SF
11,807SF
6,991SF
7,800SF 6,991SF
7,800SF
N74°17'54"W
N74°17'54"W
160
160
R=10
R=10
15.71
15.71
19.65
19.65
46.26
46.46
46.26
50.25
46.46
235.68
R=50
N15°42'6"E
N15°42'6"E
165.46
165.46
165.46
R=158
496.37
N45°30'34"W
114.04
N76°54'46"E
114.04
75.11N22°1'50"E
N22°1'11"E
85.76
N19°51'1"E
72.23
46.93
N2°41'18"W
245.35
N18°5'12"E
89.21N16°37'52"E
48.33N20°37'31"E
N40°21'45"E
28.87
19.60
N2°38'45"W
46.38
51.39
22.2337.88
20.02N5°45'20"W
N19°36'18"E
N12°29'37"E
N23°7'54"EN17°46'3"E
10.98
N35°47'27"W
72.63
61.83
23.78
24.99
71.05
N9°30'16"E
N14°16'59"E
29.26
64.47
N9°3'52"E
N29°31'15"E
N19°34'59"E
N1°16'35"W
N25°31'43"E
108.48
108.48
10
51
57
55
ORWELL DR
STEINBECK CT
1"=100'
51
PURPOSES ONLY. NO LIABILITY IS ASSUMED
FOR THE ACCURACY OF THE INFORMATION
NOTE: THIS MAP WAS PREPARED FOR ASSESSMENT
DELINEATED HEREON. ASSESSOR'S PARCELS
OR BUILDING SITE ORDINANCES.
MAY NOT COMPLY WITH LOCAL LOT SPLIT
ASSESSOR'S MAP
CONTRA COSTA COUNTY,CALIF.
BOOK PAGE4 57
570
FM. PG. 51 7-2-23
2024 ROLL-POR TR 9591 M.B. 553-39 (4-14-23)
66
67
68
69
70
71
72
73
74
7576
77
78
79
80
81
82
83
84
8586
87
88
89
90
91
92
93
94
95
9697
98
99
100
101
102
103
104
105
106
107108
109
110
111
112
113
114
115
116
117118
119
120
121
122
123
124
125
126
127128
129
130
131
132
133
134
135
136
137
138
"C"
"D"
"E"
"F"
01
02
03
04
05
06
07
08
09
1011
12
13
14
3132
33 30
2934
20
18
17
15
16
19
21
22
23
24
25
26
27
2835
36
37
38
39
40
41
4243
44
45
46
47
48
49
50
51
52
77
76
75
74
53
54
62
61
60
63
64
65
66
67
68
69
70
71
72
73
55
56
57
58
59
N88°59'27"W 180
90 90
6,990SF
6,000SF
6,000SF6,000SF 6,000SF
6,000SF6,000SF
6,000SF 6,000SF
6,000SF 6,000SF
6,000SF
6,000SF
6,000SF6,000SF
6,000SF 6,000SF
6,000SF
6,000SF
6,000SF
6,000SF
6,000SF
6,000SF
6,000SF
6,000SF
6,000SF 6,000SF
6,000SF
6,000SF
6,000SF
6,000SF
6,000SF
6,000SF
6,000SF
6,000SF
6,984SF
6,000SF
6,000SF
6,000SF
6,000SF
6,000SF
6,000SF
6,000SF
6,000SF
6,000SF
6,373SF
6,979SF 6,979SF
6,986SF 6,988SF
6,373SF
N88°59'27"W 180
90 90R=10
15.71R=1015.71
N88°59'27"W
90
N88°59'55"W
100
N88°59'55"W
100
N88°59'55"W
100
N88°59'55"W
100
N88°59'55"W
100
N88°59'55"W
100
N88°59'55"W
100
100
100
100
100
60 60
60
60
60
60
60
60
60
60
60
70.05
55.06
60
60
60
60
60
60
60
60
N1°5"E
135.01
R=548
140.60
N1°5"E
534.98
0.73
N74°17'54"W
110
N15°42'6"E
243.23
67.40
N1°5"E
N88°59'27"W
150
0.87Ac
R=1018.27
R=1014.35
N88°59'27"W 180.57
90.5790
70.15
N1°5"E
R=10
15.71R=1015.71
61.72
R=492
66.74
54.98
5.02
N88°59'55"W N88°59'55"W
100 104.97
55.14
60 60
60 60
60
N88°59'55"W N88°59'55"W
100 105
105100
6,000SF
6,300SF
6,000SF 6,300SF
6,993SF 7,207SF
55.13
60
60
N1°5"E
595.14
595.13
N1°5"E
60
60
70.12
N1°5"E
N1°5"E
N88°59'55"W
100
N88°59'55"W
100
100
N88°59'55"W
100
27.43
N71°6'24"E
27.03
N88°59'27"W
63.73
N1°5"E
399.97
21.81
N83°19'30"E
R=180
149.68
75.85
R=80
N0°0'0"E
149.26
N0°0'0"E
149.26
49.70
R=32R=4550.92 21.51
47.06
N17°32'8"E
33.98
N36°54'40"E
114.77
N7°5'27"E
58.13
66.50
N14°49'43"E
N20°25'3"E
R=10 R=1015.71
15.71
N88°59'55"W 185
90 95
N88°59'55"W N88°59'55"W
N88°59'55"W N88°59'55"W
N88°59'55"W N88°59'55"W
100 105
100
100
105
105
100 105
105100
100 105
60
60
60
70 60
60 60
60
60
60
60
60
60
60
60
60
60
60
60
60
60
N1°5"E
N1°5"E
N1°5"E
N1°5"E
6,300SF
6,300SF
6,300SF
6,300SF
6,300SF
6,300SF
7,329SF
6,000SF
6,000SF
6,000SF
6,000SF
6,000SF
6,000SF
6,979SF
N88°59'55"W 185
R=200
409.63
R=176
144.58
R=100
94.81
R=200 293.56
R=66103.67
48.70
R=66
54.98
103.67
N1°5"E
534.96
60
60
60
60
60
60
60
N46°43'30"W
23.20
N88°59'55"W
97
3
N88°59'55"W
N88°59'55"W
N88°59'55"W
100
100
100
100
100
100
100
6,373SF
52.45
N1°5"E
0.99Ac
1.11Ac
148.12
145.44
R=200 336.02
98.48
R=140
N1°5"E
745.99
75.94
N88°59'55"W
N88°59'55"W
55.10
R=10 R=10
15.7115.71
60
60
60
60
60
60
60
60
60
48.70
9090
180
180
R=66
103.67
54.98
N88°59'55"W
100
N48°43'40"E
23.20
60
N1°5"E
60
N1°5"E
60
N1°5"E
60
N1°5"E
60
60
60
60
N1°5"E
595.10
N88°59'55"W
100
100
100
100
100
100
100
100
100
N88°59'55"W
N88°59'55"W
N88°59'55"W
6,991SF
R=10R=10
15.7115.71
55.07
55.10
70.08
N1°5"E
N1°5"E
70
60
60
N1°5"E
60
N1°5"E
60
N1°5"E
60
60
60
60
N1°5"E
595.10
60
60
60
60
60
60
60
60
60
60
60
60
60
60
60
60
60
60
N1°5"E
595.07
N88°59'55"WN88°59'55"W
100 100
100 100
100 100
100 100
100 100
100 100
100 100
100 100
100 100
N88°59'55"W N88°59'55"W
N88°59'55"W N88°59'55"W
N88°59'55"W N88°59'55"W
N1°5"E
595.06
103.67
R=66
48.70
54.98
N46°43'30"E
23.20
(SEE APN 004-550-022)
POINT OF TIMBER RD
IRVING LOOP
LEE LOOP
IRV
ING
LO
O
P
IRV
ING
LO
O
P
LEE LO
O
P
LEE LO
O
P
11
BK
54
1.52Ac
ASSESSOR'S MAP
CONTRA COSTA COUNTY,CALIF.
BOOK PAGE11 22
1"=800'
STA. POST 90 D 1432.13
ND
U.S. 4
R=42'
R=20
55.32
330
E
165'
250'
165'
23 21
.95Ac.
330
E
CL25'R/W TO B.B.I.D.
430 D 207 1/30/23
CL25'R/W TO B.B.I.D.
430 D 182
1/30/23
CL33' R/W TO B.B.I.D.
430 D 192
1/30/23
N88°59'27"W
1629.51
954.01
PO
INT
O
F
TIM
BER
RO
AD
11
12
23 24 25 26
27
13 14 37
16
39
33
29
ND
1320.0
U.S. 5
ND
N 2640
N01°01'09"E
U.S. 6
w
1320.0
954.46
DESIGNATED REMAINDER
220
N01°01'44"E
655.73 655.73650.96
40' R/W 675.50
650.75 655.73
675.50
675.50
N88°59'27"W
N88°58'16"W"A"
653.82
675.50
655.70
N88°58'16"W
655.732
BIXLER ROAD
19
29
33
2517
HIG
HW
AY
STATE
HIGHW
AY
BO
RDEN
1.366Ac.
N88°13'50"W
230'
278'
175 230
US
POST
OFF
3
DED TO Co.
1499.40
10'
3N0°1'47"E
N89°16'32"W
1322.65
405
"C"
U.S.8
5280
1494.25S0°1'37"W 1 3
1595.15185.66340.86370.89
80'R/W
N89°57'37"E
1877.95
"A""B""C"
10.88Ac
1277.96
1277.97 1277.97 46.80Ac
"D"
U.S.A. TOWERLINE R/W
P.G.& E. TOWERLINE R/W
870.91 340.86 340.86
250
180
50'
2 1375.51
30'R/W
1278
1323.82
"D"
45.47Ac
N0°59'07"E
32.11
26
35
4
P B
4
176 PM 14
2-
1-
3-
9-20-72
11-30-90
12-30-98
21
2
"B""C""D"
2616.24
2
U.S. 7
60'R/W
1320.0
E
2613.83
IRRIGATION
CANAL
35
TO PCL. 09-230-001
N89°0'53"W
772.6
47
31
303
3
1
NEWPORT DRIVE
223.18
184.36
186.16
156.34
30' Access Easement 38.82
1054.79
N89°3'10"W
N89°8'9"W
10
1
1
3629.32
10.0Ac 9.07Ac
60 61 62
220
7/22/22
FM 115/23 4-8-99
POR SECS 26 & 35 T 1 N R 3 E MD&M
24 PM 19
149 PM 47
10/27/05
MB 485-01
TR 8710
20
21
04
40
4.21Ac
6.62Ac 1043.63
591.30
452.33
452.65
14.84Ac
326.60Ac
.926Ac
9.82Ac9.84Ac9.84Ac9.76Ac
57.29Ac
870.00
PURPOSES ONLY. NO LIABILITY IS ASSUMED
FOR THE ACCURACY OF THE INFORMATION
NOTE: THIS MAP WAS PREPARED FOR ASSESSMENT
DELINEATED HEREON. ASSESSOR'S PARCELS
OR BUILDING SITE ORDINANCES.
MAY NOT COMPLY WITH LOCAL LOT SPLIT
03-23-00
MB418-26
TR7686
08-29-02
MB446-43
TR8456
22.03
121.90
ND
CODE
LINE
CODE LINE
ND
770.85
S89°50'49"E
1129.67
S47°37'44"W
243.58
110
120
120
ND
420.0
360.0
496.37
R=158
120120
180.0
TO BK 4 PG 51
18
17
10
ASSESSOR'S MAP
CONTRA COSTA COUNTY,CALIF.
BOOK PAGE11 23
08
41
A
A
A
300
20.0
334.77
N88°58'33"W
420.0
N88°57'59"W
344.24
535.0
N88°58'33"W
N01°06'E
535.0
R=20
22.04
N01°01'45"E
1120.02
S
300
199.98
1729.86
N65°05'W
E
W
643.50
N
N57°52'E66.0 S64°29'E124.08
N77°29'E
341.88
N32°58'W
199.98
N50°33'W
279.38
N42°40'W
S71°41'W36.30
S19°12'E
27.72
S82°W
100.82
304.26
S14°18'W
S30°47'E
111.54
S80°53'E
43.56
N88°43'E
41.58 579.5
1319.34 TOTAL
A
"A"
POINT OF
BIXLER
TIMBER ROAD
R=42
178.24
CANAL
CANAL
CANAL
CANAL
SEE PAGE 27
SEE PAGE 28
SEE
RO
AD
SEE PAGE 27
MAIN CANAL
CANAL
U.S. 1
U.S. 2
135PM37
149PM18
1-
2-
3-
10-13-81
9-15-88
11-01-90
24
16
230
FM. 115/21
230
1"=400'
23
EAST CONTRA COSTA IRRIG DIST
420
"E"24
"G"
"Q"
"J""I"
"R"
"D"
"P"
48
42
33
25
"L"
"M"
47
40
TR 8023
09-04-01
POR TR 8023A- 2002-
"S"
"N"34
.222Ac.
A
41
TR 8429
09-07-01
WY
GRAND
"A"
MB 433-44
MB 433-32
A
B- 2002-POR TR 8430
B
C
42
TR 8430
MB 436-17
10-25-01
35
LAKESHORE CIRCLE
37
PVT ST
ESKLAHORE CIRCLE
43
TR 8428
MB 436-10
10-24-01
10-26-01
MB 436-22
TR 8431
44
CC
C
38
"A"
C- 2002-POR TR 8431
B
B
B
B
B B
B
MB 433-32 (LAKESHORE 1)
MB 436-17 (LAKESHORE 4)
MB 436-22 (LAKESHORE 5)
27
21
20
"A"
"B"
45
TR 8432
MB 442-41
05-20-02
46
TR 8433
04-23-02
MB 442-6
LAKE & PUMP STA.
.191Ac.
41.40109.4284.27 50.78
7.40
R=184.04R=184.04
62.41
489.36R=514.87
R=29.68
39.64
R=444.84
33.26
R=25.32
41.22
101.16
R=509.60
207.50
R=343.42
R=17.23
17.04
R=44.95
92.026.56262.66
N86°46'19"W
323.12
N88°59'27"W
86.15
16
311.24
S87°23'39"E289.2480.90
226.19
N89°34'20"W
244.54
N1°0'27"E
127.95N74°34'15"W
585.33
N88°59'27"W
41.79
173.23
R=182.41
58.28
361.15
R=442.05
664.33
45.15
541.72
208.02455.39
N85°17'38"W
77.07
10.34
61.8719.68
199.02
29.95
41.35
R=64.76
88.26
20
70.07
42.44
113.60
77.0710.34
R=64.99
44.72
19.68
68.56
216.81
N1°28'E
19.68
R=44.95
159.60
31.64
99.18
101.92
25.10
88.47107.70
R=64.99N1°0'33"E 100.14 R=474.86
839.75
272.04
N4°59'45"E
R=753.73
R=64.99
R=64.99
19.68
TO PG 40
(OASIS DR.)
50' RDWY/UTILITY EASE.
45
46
80
28.5
81.5
28.5
40.38 40.38
160.0
80
131
28.86
131
97PM50
51 55
FM PG 27
FM PG 27
POR S SEC 23 T1N R3E MDB&M
2.315Ac
997.37
5.16Ac
.385Ac
5.070Ac
R=548.44
1.011Ac
20.768Ac
3.462Ac
10.407Ac
10.62Ac
10.920Ac
.40Ac
.131Ac
.241Ac
004-010-008
8/10/12
1953.6
N38°13'1"E
223.4
203.50
N89°00'W
S
ND
1320.0
STA. POST
90 D
U.S. 3
54
50
44.900Ac
26.953Ac
745.99
CODE LINE
180.0
N88°59'27"W
N88°59'27"W
180.57
56
56
149.26
94.81
144.58
R=176
R=100
49.7
R=32
R=200
214.91
296.78
R=330
313.87
R=145
119.69
R=130
249.68R=170
R=120
221.84
98.01
R=100
R=320
307
158.29
R=180
R=135
121.6
57
997.37
N65°05'W
145.08
264.09
S11°55'15"E
204.6
S4°0'15"E
S15°11'45"W
457.38
153.51
115.19S1°0'5"W52
565656 180.0180.095
R=200
336.02
R=140
98.48
321.87
223.38
298.51
R=160
105.14
60
4
PB
PURPOSES ONLY. NO LIABILITY IS ASSUMED
FOR THE ACCURACY OF THE INFORMATION
NOTE: THIS MAP WAS PREPARED FOR ASSESSMENT
DELINEATED HEREON. ASSESSOR'S PARCELS
OR BUILDING SITE ORDINANCES.
MAY NOT COMPLY WITH LOCAL LOT SPLIT
53
4
PB
"I"
"G"
7.84Ac
D- 2024-POR TR 9591 MB 553-39
D
D
D
D
D
7/2/23
53,54
R=200
293.56
194.72R=200
ASSESSOR'S MAP
CONTRA COSTA COUNTY,CALIF.
BOOK PAGE20 19
38/17
N89°53'E
81
12.66Ac
20
EDEN
PLAINS
110
110
RO
AD
28
RR
N47°43'W
213.2
N47°03'34"W
1228.19
309.48
(N89°15'37"W)
597.04
876.58
N0°39'23"E
N42°56'26"E
70.99
839.70N89°12'37"W
1170.35
71
76 75
74
73
72
64
65
66
78
79
80
16
38 39 08
32 58 59
60 61
36 37
22
3334
24
50
51 53
68
67
6263
6970
28
54
55
56
57
PCL"C"PCL"D"
PCL"B"
PCL"A"
"A"
"B"
"C"
PCL"A"PCL"B"
"B"
"C"
"D"
"C""D"
"C""A"
"D"
"B"
"B""A"
"B"
"A""B"
"C""D"
"B"
"A""A""B"
"D""B"
"A""C"
"A""B"HO
TC
HKISS LN
DELTA ROAD
PASTO
R
LANE
BY
RO
N
190
19018
11 12
13
17
777.6
597.04
1043.66
521.70 519.64
413.97
323.5
415.15
548'
413.97
831.02
831.01
831.01
517.04 519.64
S89°57'E
N89°55'30"W
407.06
(N0°39'23"E)
876.06
406.71
150
548'
777.60
548'
1680.80
1680.80
777.60
N89°12'37"W
N89°12'37"W
548'
564.13
777.6
S89°15'37"E
564.81
13
14
14
14 14
14 11CO. 30' R/W
(.89Ac.)
30'
R/W
CO. R/W 30'
11
(.91Ac.)
(.37Ac.)
DED. TO CO.
S0°39'23"W
11
S0°39'23"W
11
13
13 15
150
N00°02'08"W
1069.66
407.06
1275.53
S0°05'40"W
647.67
EAST
406.71 30
315.37
315.38
406.36
N00°05'40"E
N89°55'30"W
1072.42
N89°55'30"W
1071.50
N89°55'30"W
1070.58
406.36
278.52
N89°59'55"E
425
278.52
455
455
N89°59'55"E
243.32
425 455
455
191.50
191.50 200
N89°59'55"E
20050'
20'
30' ACCESS &
U.T. ESMT.
2639.13 TO
C BYRON AVE.L
15 1
2
CONTRA
COSTA
2
4
4
600
863.09
N0°05'40"E
290.45
387.16
379.37
56'
387.33
140
282
282475
281.65
1405 9
9
9
5
2644.93
WEST
50'
317.37 317.37
774.74'
317.37 317.37
281.65
281.65
9
387.33
319.12
319.41
387.16
401.37'
56'
609.48
9
10
600.00
N0°05'40"E
373.37'401.37'
411.24 EAST
333.50
333.50
411.24
WEST
315.38
315.38
N0°05'48"E
N0°05'40"E
4
2
2
7
IRRIGATION DIST. 5764 OR 643
5
24
12
744.74
EAST
315.37
315.32
2 7
376.37
42'
3
609.48
376.37
EAST 1169.48
N89°53'W
350
350
S89°53'E
S0°05'40"W
125 125
CL
1
522.87
383.94
S89°58'E
383.94
732.74 N89°58'55"E
315.42
N0°05'40"E
355.94
355.95
628.49
1420.19
376.37 269.13
285'
315'
S30°58'E
34.99
285'
N30°58'W
34.99
600
N0°05'40"E
315
376.37 EAST10
12
EAST
(.43Ac.)
315'
N0°05'40"E
315
376.37
181.72 171.73
181.77181.77
276.78
276.34
286.69
286.64
286.64
286.71
181.778
8
(.33Ac.)
376.37
363.37
8
31
10
10
12
12
2
2
76.24
98.2
84'
42'STORM DRAIN ESMT.
7
22
N0°05'40"E
315.52
7
165.08
22
33 34
3 4
T2N R3E
TIN R3E
N SEC.4 TIN R3E MDBM
RECORD OF SURVEY
2-1969-
3-1970-
4-1970-
5-1970-
7-1974-
1-13-69
4-9-69
3-11-70
7-20-70
7-20-73
28L.S.M. 43
10-
8-17-73
9-18-74
3-25-77
11-
12-
13-
14-
15-
10-26-77
5-31-79
1-25-91
9-24-91
12-30-94
150PM46
154PM34
1-
MIDPOINT
SEC.4
1"=400'
50
50
320.64
S89°14'58"E
1099.42
82
12.72Ac
"A"
"B"
N47°02'32"W
N0°58'01"E
16 16
16
16-8-6-04
2122.06
17'
N89°01'59"W
BNSF
1502.06
620.0
688.41
416.53
1560.24
7PM1
8PM3
12PM5
13PM39
29PM7
1965-
29PM32
35PM18
53PM12
8-1974-
9-1975-
77PM23
166PM1
191PM1
58PM49
2.91Ac 2.0Ac 2.09Ac
0.91Ac
2.05Ac 2.05Ac
2.81Ac 2.81Ac
5.26Ac
1.20Ac 1.18Ac
1.31Ac 1.30Ac AV
E
POE LN
5.14AcN 5.53AcN
2.46Ac
2.72Ac 2.72Ac
2.44Ac
19.63Ac
10.00Ac
15.89Ac
9.91Ac
9.78Ac
12.01Ac
10.00Ac
10.00Ac
9.91Ac
9.91Ac
9.91Ac
10.08Ac
9.78Ac
5.79Ac
5.34Ac
2.41Ac2.98Ac
2.06Ac
5.39Ac 2.78Ac 2.58Ac
21.585Ac
1.00Ac
N89°59'55"E
440.53
467.40
799.26
83
84
5.55Ac
215
PM44
12/31/19
17-215PM44 12-17-19
17 15
15
17
17 17
EASEMT.
STORM DRAIN
162
MOUNTAIN VIEW DR
394
N00°02'08"W
819
PURPOSES ONLY. NO LIABILITY IS ASSUMED
FOR THE ACCURACY OF THE INFORMATION
NOTE: THIS MAP WAS PREPARED FOR ASSESSMENT
DELINEATED HEREON. ASSESSOR'S PARCELS
OR BUILDING SITE ORDINANCES.
MAY NOT COMPLY WITH LOCAL LOT SPLIT
"A"
"POR A"
(REM PCL 215PM44)
17
ASSESSOR'S MAP
CONTRA COSTA COUNTY,CALIF.
BOOK PAGE95 6
060
14
05
07
11
060
BELLA VISTA
AMENDED MAP OF BELLA VISTA
IN
G
L
E
W
O
O
D
B A
A
30
'
R
/
W
20
'
R
/
W
RO
A
D
CA
N
A
L
66
67 68
(2
4
6
O
R
2
3
1
)
17
1415
12
1606
08
TO CO
6565.57
10
7
140.37
40
50
75.57
75.57 318.1 4025
60
0
25 40
133.4
29
3
.
2
5
'
N7
2
^
4
3
'
W
28
0
243.1140.57
27
1"
=
1
0
0
'
Sanborn Date : 28/05/1999
1
2
3
4
5
6
7
8
18
19
20 21
22
23
24
8,793SF
6,859SF
7,502SF
6,602SF
8,612SF
9,689SF
9,472SF
TRACT 8902
CC
C C
PURPOSES ONLY. NO LIABILITY IS ASSUMED
FOR THE ACCURACY OF THE INFORMATION
NOTE: THIS MAP WAS PREPARED FOR ASSESSMENT
DELINEATED HEREON. ASSESSOR'S PARCELS
MAY NOT COMPLY WITH LOCAL LOT SPLIT
OR BUILDING SITE ORDINANCES.
9,221SF
TR
9189
110.48
110.17
85.02
111.72
109.90
68
.
0
68
.
0
60
.
0
60
.
0
78
.
3
3
87
.
7
7
40
'
P
G
&
E
E
A
S
E
110.77
75.58 60.07
83.54105.1893.15
62
.
0
90
.
0
62
.
0
23
.
9
N0^27'41"E
N0^43'21"E
N0^27'41"E
N0^27'41"E
11
9
.
9
1
81
.
9
1
91
.
3
7
N0^43'21"E
N8
9
^
3
2
'
1
9
"
W
28
0
.
0
28
0
.
0
28
0
.
0
80.0
46
.
2
1
N6
5
^
0
3
'
1
9
"
W
N7
2
^
1
7
'
1
8
"
W
N8
9
^
1
6
'
3
9
"
W
R=20
24.92
30
.
0
28
.
3
1
23
.
5
3
33
.
0
3
R=
8
0
29
.
9
5
AC
C
E
S
S
E
A
S
E
A-
B-MB 31-12 10/7/1946
MB 18-450 6/3/1924
MB 499-23 11/29/2006
2.92Ac
.49Ac .51Ac
.90Ac 1.36Ac
E
B
M
U
D
N0^27'41"E
182.0BELLA VISTA AVE
7/15/57
29
3013 OR 166
ND
ND
26
5
4 3 2
1
4,393SF3,740SF
4,426SF
07
3,742SF4,393SF
5,351SF 3,157SF 3,162SF 3,454SF
6 7 8 9
EL RINCON RD
S0^2'35"E
D
58
.
1
4
N0^0'56"W
84
.
1
6
84
.
3
8
25.95
54.1
80.05
58
.
4
4
58
.
4
9
54.05
58
.
5
3
58
.
5
7
38
26
84
.
6
2
63.95
38
40
.
1
2
47.57
D
84
.
0
7
DD
58
.
0
9
40
.
1
2
47.58
272829
30 31 343332
D-TRACT 9189
C-
26
38
26
9/15/10
MB 512-9 (BAY POINT HOMES) 8/10/2010
04
ST
A
T
E
H
W
Y
4
ST
54.0 59.0 64.0
R=18R=18
28.27 28.27
1.01.0
26
26
52
.
0
65.57
N0^00'00"EN0^00'00"E
65.58 64
SE
E
P
G
1
7
FE
D
E
R
A
L
E
N
G
C
O
N0^00'00"E
80.0
ASSESSOR'S MAP
CONTRA COSTA COUNTY,CALIF.
BOOK PAGE96 3
90
90
299.33
299.74
10
0
10
0
140.00
EAST
60
50
50
60
90
140.00
WEST
40
50
40
NO
R
T
H
15
0
15
0
102.5
102.5
102.5
300.97
50
50
50
50
50
11
8
13
8
N89^10'20"W
102.5
82.50
S89^10'20"E
82.49
11
6
.
9
4
13
6
.
9
1
13
8
.
9
1
31.
4
2
31.
4
2
R=2
0 R=2
0
33
.
0
6
31.
4
1
31.
6
5
R=2
0
R=2
0
7575
75
S89^10'20"E
55
2'33
.
1
3
11
6
.
8
7
13
6
.
8
9
13
8
.
8
9
99.99
102.5
102.5
102.5
138.75 163.75
200
15
0
50
50
5050
50
50
50 50
50
50
5050
50
50
50
48 48
50
50
50
50
50
50 5050
138.75
138.75
20
0
138.75138.75
50 50
10
0
.
0
138.75
25'138.75138.75
5050
50
50
50
50
50
50
50
50
50
5050
50
50
50
50
50
138.75 138.75
60
45
5
52.59075
13
8
11
7
.
9
9
11
8
.
0
1
12 1290
144.99 92.50N89^10'20"W 31.4
1
R=2
0
To
C
O
U
N
T
Y
4
1
5
8
8
-
5
4
AV
E
N
U
E
.50Ac.
.12Ac.
1.03Ac.
1
1
1 1
1 1
.52Ac.
60
2'
.922Ac.
STATE HIGHWAY
12
SO
L
A
N
O
PO
I
N
S
E
T
T
I
A
AV
E
N
U
E
AV
E
N
U
E
A B032 033
031
19
04
14
15
06
07
08
22
16
09
10
11
28 29
16
17
32
18
19
20
22
23
30
08
04
27
24
25 31
03
01
02
03
04
05
06
08
09
10
11
12
13
36 39
3719
20
21
33
24
27
32
34
35
28
40
41
1 2 3 4 5 6
7
8
9
10
11
12
13
37
38
39
40
41
42
43
1 2 3
4
5
6
7
8
10
18
87LSM251-
02
95
P B
98
P B
031
032
033
1"=100'
04
Sanborn Date : 28/05/1999
E-18
3.40
113.75
2.69 25
4.55135.55134.495.96138.75 5.84
5.37
135.04
5.11 135.13
2.11
134.16 6.47
PURPOSES ONLY. NO LIABILITY IS ASSUMED
FOR THE ACCURACY OF THE INFORMATION
NOTE: THIS MAP WAS PREPARED FOR ASSESSMENT
DELINEATED HEREON. ASSESSOR'S PARCELS
MAY NOT COMPLY WITH LOCAL LOT SPLIT
OR BUILDING SITE ORDINANCES.
SIINO WEST AVE
2.55
6/7/05
POINSETTA LAND CO WEST PITTSBURG TRACT UNIT No 1
48
48
50
52
.
1
1
(
T
)
N45^50'20"EN44^09'40"W
N44^23'06"W N46^28'04"E
N45^50'20"E
48
50
52
.
4
1
53
.
2
7
134.61
N43^49'38"W
50
53
.
7
0
24-9
1.437Ac
200
198.77
S0
^
5
0
'
2
0
"
W
1
0
0
N89^9'37"W
N0
^
0
5
'
2
0
"
E
22
MB 19-506 6/8/1926
101.88
N89^09'40"W
N89^09'37"W
N89^09'40"W
N1
^
0
4
'
2
0
"
E
13
7
.
0
N1
^
0
4
'
2
0
"
E
28
7
.
0
N
B
R
O
A
D
W
A
Y
5/4/1988
1/18/11
( WILLOW PASS RD)
ASSESSOR'S MAP
CONTRA COSTA COUNTY,CALIF.
BOOK PAGE98 18
30 27 22 07 33
21
34 05
36
10
37
35
15
17
43
16
25262928
13
19
21
180
180
RECORD OF SURVEY
2-
3-
4-
5-
5/28/69
10-26-78
4-25-66
9/30/64
"A""B""A""B"
2
DRIFTWOOD DRIVE
PACIFICA
AVE.
.25Ac .24Ac .24Ac..25Ac.
"C""C"
2.33Ac.
"A""B"
.50Ac
"B"
"A"
"C"
1.79Ac.
"A"
.50Ac
1.12Ac.
"B"1.11Ac.
1.12Ac.
32 3
2 2 3 3 4 4 5 5
1
"C"
4 4
5 5 1
1
200 N0°42'16"E N0°42'16"E 200 100 100
S0°20'E N0°43'40"E
200 100
N0°43'40"E
100.00
100.00
20' R/W
N89°17'44"W
490.0'
614.49
N0°42'16"E
87.087.0
87.0 67.0
125.0
125.0
N89°17'44"W
35
200
N89°17'44"W
26'26'
105.0
105.00
N89°17'44"W
R=20'
31.42 31.42
25
200
N89°17'44"W
125.00
67.00 87.00
87.0087.00
N0°42'16"E
100
N89°17'44"W
125.00
100
625
489.49
625 615
410.60
410.60
2003525
N0°20'W
35 35
200
100.00 100.00
N0°43'40"E
100 30 2525
30
100
100
S0°43'40"E
N0°43'40"E
130.00
443.46
216.97
30
25
R=45
70.98
S89°16'20"E
5.00
2100.0
100
214.40
214.40
S89°40'W
N89°16'20"E
N89°16'20"E
N89°16'20"E
515.00
515.00
N89°16'20"E
375.00
100
S0°43'40"E
N89°16'20"W
217.8
217.8
S89°16'20"E
187.00 400
136.68
S0°43'40"W
261.09
S89°38'35"E
188.00
188.00
375.00
47.81259.87
N0°43'40"E
130.00
218.7
218.7
100
S0°43'40"E
200
184.4
50
184.4
100
S0°43'40"E
S0°20'E
388.69 46.21
200
44.62
200.36
200.35 S88°52'W
1"=100'
.423Ac
N89°16'20"E
2.33Ac
R=20
1.44AC
99
BK
42
FM 103-12
E-16
D-16
PURPOSES ONLY. NO LIABILITY IS ASSUMED
FOR THE ACCURACY OF THE INFORMATION
NOTE: THIS MAP WAS PREPARED FOR ASSESSMENT
DELINEATED HEREON. ASSESSOR'S PARCELS
OR BUILDING SITE ORDINANCES.
MAY NOT COMPLY WITH LOCAL LOT SPLIT
41
WHARF DR.
N0°13'E
24
56
438.75
N0°13'E
52.03
S18°18'46"W
.903Ac.
7/9/69
554.84
116.09
EASE TO CO
58.68
52.60
N0°46'W
S89°38'35"E
17.25
S0°21'25"W
9.62
526.0
605.04
70.71
N89°55'47"E
15 S0°39'05"W
N89°55'47"E
70.69
8PM48
9PM32
71PM17
42LSM1
30LSM32
4 SEC 9 T2N RIW MDB&MPOR NE 1/
.10AC
526.0
S0°43'40"W
N89°55'40"E
70.0
.819Ac S89°38'35"E
.94AC
.49AC 1.64Ac 1.18Ac 1.43AC
1-
2/23/17
MB 532-1
TR-9352
59
9352
TR
7/3/17
ASSESSOR’S MAP
CONTRA COSTA COUNTY,CALIF.
BOOK PAGE98 21
04
20
1918
51
22 54
58
23
24
49
51 47
50
46
37
48
52
53
56
33
34
32
35
01
02
26
"C"30
"D"
08
09
07
21
25
19
16
17703
10-18-85
TO Co. 61D53- 5/11/92
710 2.22Ac.
29
0
.
1
5
N0
^
2
9
’
2
8
"
W
994.83’
N89^42’30"E
N89^53’12"E
L=31.41’
PACIFICA AVE.
522.5
IN
L
E
T
D
R
.
HA
R
B
O
R
D
R
.
DE
L
T
A
D
R
.
CA
N
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L
D
R
.
BR
E
A
K
E
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D
R
.
BE
A
C
H
D
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.
N88^58’20"W
37.5 306.46
20
162
.
5
3
170
.
7
8
142
.
3
4
207
.
7
7
54.43
7.209Ac.
468
.
3
2
N53
^
4
4
’
3
3
"
W
166.0 58
.
1
8
431
31
N0
2
^
5
5
’
E
60
6
.
0
1
.563AC.
551
299
N89^05’W
252
63
5
N0
^
5
5
’
E
20
5
.
4
5
18
6
.
7
3
12
4
.
6
4
272.
2
7
N0
^
5
5
’
E
33
9
N8
^
0
2
’
5
4
"
E
84
.
1
36
5
60
.
3
6
109
.
9
9
76
.
9
5
10
6
.
1
10
1
.
6
9
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8-13-85
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TRACT 4663
10-20-77
TRACT 6450
10-4-85
TRACT 6484
10-1-86
5.50AC.
TRACT 3885
10-23-69
MB-128-29
7.739Ac
N73^08’38"W
84.17
1.50Ac.
N1^40’11"W
281.44
2.616Ac.
3.903 Ac.
N10^12’08"W
102.12
2.434Ac.
210
CAMINO ANDRES
TR
A
C
T
3
9
9
9
8-
1
1
-
7
0
FM. PG. 49
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.
12 P.M. 12
80 L.S.M. 24
1-
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34P.M 6 & 7
POR. TRACT 6450
1"=400’
OVERL
A
P
682.11
32
3
.
5
9
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R=20’
6-3-74
L-29
1
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4
’
231
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3
4
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0
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3
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0
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1
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9 10
1516
9-4-86
TRACT 6537
10-18-85
TO
19.27AC.
372
65.52AC.
M/R
ST
A
T
E
HW
Y
.
SE 1/4 SEC. 9 & SW 1/4 SEC. 10 T2N RIW MDBM
60
.
3
9
32
5
.
1
3
7.60Ac
MID - SECTION LINE
57 0
R
6
9
M.B.-99
PURPOSES ONLY. NO LIABILITY IS ASSUMED
FOR THE ACCURACY OF THE INFORMATION
NOTE: THIS MAP WAS PREPARED FOR ASSESSMENT
DELINEATED HEREON. ASSESSOR’S PARCELS
MAY NOT COMPLY WITH LOCAL LOT SPLIT
OR BUILDING SITE ORDINANCES.
23
0
1015.60
05
07 08
MT. DIABLO UNIFIED SCH. DIST
35129-7/2/53
E.B.M
.
U
.
D
.
(MOTO RANCH UNIT NO.1 ) M.B. 294-42 10-4-85A-
2-
3-25-70
511.85
12.0Ac
18.36Ac
45.547Ac
MB 296-1
21.34Ac
MB 294-42
84.79Ac
25.37Ac
MB 307-15
MB 203-31
14.19Ac
MB
1
3
2
-
2
2
6.
5
9
8
A
c
TR 6555
TRACT 6538
MB 296-7
4.27Ac
MB 306-1
9-4-86
TR 6554
MB 306-5
MB 292-22
TR 6553
MB 305-48
19.63Ac
MARINERS COVE
MOBILE HOME PARK
MT. DIABLO UNIFIED SCH. DIST
2109 OR 504
55
8/8/13
TR 8830
MB 516-40
7/18/13
PURPOSES ONLY. NO LIABILITY IS ASSUMED
FOR THE ACCURACY OF THE INFORMATION
NOTE: THIS MAP WAS PREPARED FOR ASSESSMENT
DELINEATED HEREON. ASSESSOR'S PARCELS
OR BUILDING SITE ORDINANCES.
MAY NOT COMPLY WITH LOCAL LOT SPLIT
1 2 7 8 9 10
50 49
48
47
46
45 44 43 42
41
40 39
38
37
36
35
34
3
4
20 19 18 17 16 15 14 13
12
116
5
33
32
31
30
292827262524232221 1"=75'
55.20 54.12 54.12 54.12 54.12 54.12 54.12 54.12 69.97 110.48
39.54 54.50 54.50 57.46 57.99 53.55 54.15 33.30
N89°17'44"W 101
101N89°17'44"W 135
46
46
116.45
96.87
102.50
N89°17'44"W 102.50
109.40
118.59
49
45
44
50
86 85 85
102.50
95.99
107.13
107.13
50 51
51.20 51.20 51.20 74.39
50 51 28 55.20 45 52.11 30.07 11.23 72.03
02.001 W"44'71°98N
74.77
35.701
35.701
35.701
79.88
79.88
02.55 54
04.901
11.25 50.37
07.18
61.521 W"44'71°98N
69.511
65.81
64
64
64
64
05
101
101 69.511
471 E"61'24°00N
11
11
3939 39
82 82
53.15
)T(92.39
14=R
501 W"44'71°98N
501 W"44'71°98N
29 E"61'24°00N
39
471 E"61'24°00N
31.701
DRIFTWOOD CIR
04.132
05 15 82 02.15 02.15 02.15 93.54
39 39 09 09 09 09
16
95.811
01
01
23.16
68
65
92=R
55.54
63
05.03
W"90'11°80N 33.74
83.63
14=R
)T(92.39
99=R
11.23
02.53
03
)T(05.16
86.83
002 E"61'24°00N
N89°17'44"W 489.49
05.201
02.64
59.83
97.89
R=99
46.73 65.33
45
45
45
13.28
10.40
R=99
36.10
37.64
107.13
107.13
31.42
R=20
31.42
R=20
33.28 E"02'93°91N
99=R
55.54
92=R
58 58 58 58 58 58 58
66.79
58
7
66.62
49.82
03
32
54
54
54
07.54
50.84
5454
5454
5454
13.25
13.25
30.05
30.05
64
05
54
99.75 51.45 03.26
49
45
46
46
21.45 21.45 21.45 21.45 21.45 21.45 21.45
45.95 05.45 05.45 64.75
58 585858
"C""D"
"A"
"B"
"J"
"H"
"E"
"F"
"I"
"G"
2018 ROLL-TRACT 9352 MB 532-1 (DRIFTWOOD ESTATES) 2/23/17
4,650SF 4,743SF 4,608SF 4,608SF 4,608SF 6,515SF
4,650SF 4,743SF
4,646SF
4,646SF
5,936SF 4,839SF 4,636SF 6,372SF
5,631SF
5,801SF
8,349SF
5,603SF
4,821SF
4,821SF
4,821SF
4,604SF
4,609SF
4,612SF
4,612SF
4,612SF
4,674SF
3,665SF
11,899SF
4,646SF
4,646SF 4,923SF
5,361SF 5,335SF
5,930SF
4,939SF 4,632SF 4,632SF 4,884SF 4,987SF 4,604SF 4,603SF 5,115SF
4,601SF 4,600SF 4,600SF 4,600SF 4,600SF 4,600SF 4,600SF 4,600SF 4,603SF
7,521SF 7,096SF
8,506SF
6,543SF12,402SF
5,180SF 5,056SF
7,560SF
01 02 07 08 09 10
11
12
03
04 05
06
1314151617181920
21 22 23 24 25 26 27 28 29
51
52
30
31
32
33
34
35
36
37
38
3940
41
46
47
48
50 49 59 45 44 43 42
57 56
55
58
5453
60
9.58
W"65'94°71N
ASSESSOR'S MAP
CONTRA COSTA COUNTY,CALIF.
BOOK PAGE098 59
590
2.36
N65°39'35"E
16.07
R=29
16.07
R=29
DRIFTW
O
O
D DRIV
E
6.66
6.70
66.11
(PRIVATE R/W)
(PRIVATE R/W)
(PRIVATE R/W)
(PAE)
(PAE)(PAE)
17' SSE
15' SSE
99
BK 18
18
17
14
13
-mb-
25 35
25 25
(PRIVATE R/W)
FM PG 13&18 7-3-17
N89°17'44"W 624.49
234 182.37
67.76
8.16
N89°17'44"W 109.40
51.41
156.68
N00°42'16"E 248
006 W"61'24°OON
15
96.59
79.97
270
28
TO COUNTY
ASSESSOR’S MAP
CONTRA COSTA COUNTY,CALIF.
BOOK PAGE99 16
N60^
3
6
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W
S84^52’W
S60^
3
6
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402.10
453.50
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0
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3
0
356
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0
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40
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399
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100
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31.93
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4
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122.63
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STATE
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251.25
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838.0
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0
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1596
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3
FOR MIN. RTS. ASSMT ON THIS PAGE
SEE 100-380-704
31 26
19
160
4.08Ac.
LOT 51
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9
’
5
4
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W
492.8
0
36
1
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5
0
446.3
2
100
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100
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R=1900
219.95
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162.0
8
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15
353.30
S89^44’33"E
(N
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12
8
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6
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GOVERNMENT RANCH
EASE.
649.12
467
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5
0
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DEL
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CON
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214.59
232.3
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9
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16
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312
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290.88
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25
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6
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4
8
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5
1
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L=1
6
1
.
3
8
’
R=7
7
0
8.49Ac.
PURPOSES ONLY. NO LIABILITY IS ASSUMED
FOR THE ACCURACY OF THE INFORMATION
NOTE: THIS MAP WAS PREPARED FOR ASSESSMENT
DELINEATED HEREON. ASSESSOR’S PARCELS
MAY NOT COMPLY WITH LOCAL LOT SPLIT
OR BUILDING SITE ORDINANCES.
27
6.93Ac.
28
N.
D
.
161.
5
9
(
T
)
53
4
.
7
4
(
T
)
S60^
5
7
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8
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8
9
S70^E
400
S89^22’19"E
17.376Ac.
121
.
5
5
641
.
6
9
S72^2
2
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1
0
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2
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221.
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4
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R
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14.77
21
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2
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E
34
A-2007 ROLL-
A
A
A
A
A
A
A
A
F-16
160
STA
T
E
MB 497-6 (WILLOW PASS BUSINESS PARK) 10/23/06
130
8
.
2
0
128
3
.
1
3
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18
1
.
8
9
N1
6
^
3
8
’
4
9
"
W
POR PCL "B"
POR PCL "B"
POR PCL
"B"
12.72Ac
21.0Ac
PCL "B" TRACT 8918
36.72Ac TOTAL FOR PCL "B"
10/23/06
MB 497-6
TR 8918
FR PG 21
34
4/29/08
3.020Ac.
ASSESSOR'S MAP
CONTRA COSTA COUNTY,CALIF.
BOOK PAGE99 21
1"=200'
210
PURPOSES ONLY. NO LIABILITY IS ASSUMED
FOR THE ACCURACY OF THE INFORMATION
NOTE: THIS MAP WAS PREPARED FOR ASSESSMENT
DELINEATED HEREON. ASSESSOR'S PARCELS
MAY NOT COMPLY WITH LOCAL LOT SPLIT
OR BUILDING SITE ORDINANCES.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
EVORA
R
D
WILLO
W
P
A
S
S
C
T
EV
O
R
A
C
T
01
02
03
24
05
06 21
07
10
11
23
22
27
28
16
17
18
20
19
121,277SF
180,004SF
131,039SF
"C"
"A"
FM PG 16 4/5/07
15
16
16
F-16
MAB
210
POR TRACT 8918 MB 497-6 (WILLOW PASS BUSINESS PARK) 10/23/06
35,438SF
55,237SF
20'
A
C
C
E
S
S
E
A
S
E
20'
A
C
C
E
S
S
E
A
S
E
40,871SF
72,449SF
37'
A
C
C
E
S
S
E
A
S
E
21,998SF
34,432SF
21,181SF
47,068SF
29,630SF
34,214SF
30,155SF
20
'
A
C
C
E
S
S
E
A
S
E
20'
A
C
C
E
S
S
E
A
S
E
20
'
A
C
C
E
S
S
E
A
S
E
70,382SF
20'
A
C
C
E
S
S
E
A
S
E
RO
EAS
T
LINE
MON
T
E
DEL
DIAB
L
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97,106SF
COS
T
A
CON
T
R
A
CAN
A
L
20
'
A
C
C
E
S
S
E
A
S
E
41,366SF
N76^40
'
4
2
"
W
R=57
8
221.43
127.8
7
N41
^
1
1
'
5
2
"
E
240
.
3
2
20
7
.
3
8
93
.
4
9
178
.
2
3
60.
6
0
62.0
2
N57^41'16"W
4.57
R=7
7
0
193
.
4
2
N45
^
2
0
'
5
4
"
W
187
.
8
8
R=20
14.56
R=1030
12.85
N0
^
0
3
'
5
3
"
W
14.95
12
8
.
3
3
N90^E 81.72 50.20
33.1
1
158.87
S89^59'06"W
TO PG 16
22
12
8
.
3
3
1.50Ac
4.01Ac
12
4
.
2
8
S0
6
^
1
8
'
5
9
"
E
N48
^
4
8
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0
8
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3
2
2
.
1
7
156
.
9
8
318.
5
3
15.14
36.457.7447.34
12.0257.2
5
25.45
N56
^
5
8
'
3
2
"
E
2
5
1
.
9
3
27
4
.
8
8
193
.
8
1
N3
9
^
3
3
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0
5
"
W
4
6
8
.
6
9
207
.
5
8
28
3
.
1
9
LLA
27,28
09/18/13
146.87
S80^00'3
7
"
W
50.09
N2
7
^
5
7
'
5
3
"
W
2
4
3
.
4
5
ASSESSOR'S MAP
CONTRA COSTA COUNTY,CALIF.
BOOK PAGE116 06
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15 16
17
18
19
20
21
22
23
24
25
01
02
03
04
05
06
07
08
091011
01
02
03
04
05 06
07
08
09
10
11
12
13
14
15
10
11
12
1
2
3
4
5
6
7
8
9
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41 42
43
44
45
46
47
48
49
50
51
193.00
83.88
113.00
S16°51'56"W
N46°33'10"W
154.89
N64°08'44"W
121.45
116.00
413.06
119.74
100.18
N76°37'42"W
54.47
35.49R=250
65.5414.50
N44°11'56"E
50
N44°11'56"E
61.18
25.15
R=200 R=3043.85
111.22
79.38 50
R=30
112.64
N46°33'10"W
106.00
106.00
112.27
S46°45'04"E
S46°45'04"E
92.00
106.01
365.38
327.81
92.00
111.91
866.22
106.00
110.00
73.99
50
61.50
R=30
47.62R=50
30.468.81
98.15
N44°11'56"E
190.00
R=50
65.34
51.77
172.55
N43°13'50"E158.96
N46°59'04"W
123.53
14.37
30.46R=50 46.93
50
88.00
326.4288.00
79.46
140.44
139.08
N61°41'56"E105.54 134.46
N46°17'56"E85.09
19.922
107.33 22.32
42.06
149.89
N44°11'56"E
29.01
N66°14'04"W
N46°59'04"W
84.36
152.0
N44°11'56"E
121.37 47.74
54.33
50
120.00
125.00
61.69
N81°39'40"W
N44°11'56"E
S44°11'56"W
S44°11'56"W 100.00
354.93
399.50
95.00
80.00
99.50
92.00
166.00
140.062
N44°11'56"E130.00
92.00 S46°45'04"E
83.52
65.40
N44°11'56"E130.00
92.00
166.66
S46°45'04"E
56.56
136.91
81.56
98.0762.77
N15°22'18"E
50
50
135.49
100.00
95.00
N13°22'18"E
N61°55'19"W
N76°37'42"W
N76°37'42"W
110.582
130.49
108.86
99.17
S26°22'30"W
148.92
N46°45'04"W
71.00
87.49
47.17
R=100S76°37'42"E
73.06 103.11107.00
145.00
106.00
N13°22'18"E
N13°22'18"E
S76°37'42"E
131.80
S16°51'56"W95.18
85.74
180.92
6.42
131.65
125.85
92.00
137.25
138.72
91.04
91.20 R=1158.63
109.41
91.00
91.00
123.02
67.10 22.90
70.50 138.03
119.92
131.17
S85°22'32"E (R)
S67°41'49"W (R)
22.41
27.14
6.09
24.89
76.45
115.00
81.83
S60°21'12"W (R)
176.90
130.50
41.52
67.48
3.28
24.89
31.0
N44°11'56"E
100
100195.4672.40
N46°59'04"W
99.58
120
N81°40'15"E
64.02
S0°52'45"W (R)N44°11'56"E85.0
80.46
106.06
104.26N46°59'04"W
62.84
24.89
66.12
15.62
33
90.29
187.90
N52°46'45"E (R)
88.0
59.9675.96
157.73
198
88.0
S7°21'24"E (R)
133.55
143.87
N46°59'-04"W
116.27
88.0
60110
60
N44°11'56"E88.0
88.0
67.58
31.83
113.13
133.55
88.0
88.0
93
95
N46°59'04"W
110.41
130
75.41
68.88
31.0N46°59'04"W
80
80
N46°59'04"W
122.04
24.89 50.91
79.58
50
31.0
32.83
10.89
54.48
N22°25'04"W
63.37
N16°16'04"W
89.19
131.0
128.19
24.03
N28°41'04"W
63.21
19.57
96.0
148.68
76.43
3.80N45°08'01"W
N0°38'04"W22.08
34
N86°41'17"W (R)
LAURA PARK NO. 3
DRIVE
ANDREW
S
LAURA
ANDREWSCOURT
LAURA COURT
DRIVE
BAILEY
ROAD
04
05
061
063
07
063
061
062
063
115
1"=100'
062
LAURA PARK, UNIT 1
LAURA PARK, UNIT 2
LAURA PARK, UNIT 3
MB 41-37
MB 46-50
MB 50-12
51.69
PURPOSES ONLY. NO LIABILITY IS ASSUMED
FOR THE ACCURACY OF THE INFORMATION
NOTE: THIS MAP WAS PREPARED FOR ASSESSMENT
DELINEATED HEREON. ASSESSOR'S PARCELS
OR BUILDING SITE ORDINANCES.
MAY NOT COMPLY WITH LOCAL LOT SPLIT
8/28/19
40
SSE
1
2
3
4
5
6
7
"A"
20.67 60.48
167.50
104.81
108.79
124.37
120.22
N23°57'04"W 235.46
24.62
42.23
64.67
)T(951
25.44
21.12
)T(13.422 E"01'85°47N
E"65'20°66N 84.411
)T(21.531 E"65'20°66N
)T(18.681 E"45'21°07N
)T(86.586 W"11'83°63N
68.94
23.87
01.221
5.82
91.17
24.68
58.14
74.24
89.801
22.851
)T(13.891 E"34'14°97N
)T(49.751 E"61'52°48N
)T(26.764 E"65'15°61N
W"40'80°37N
26
27
28
29
30
31
32
33
.634Ac
.358Ac
.452Ac
.492Ac
.545Ac
.420Ac
.636Ac
LAURA PARK NO. 2
2,057SF
50
A
A
A
A
TRACT 9389 MB 541-22 (LAUREL PLACE II) 7/24/19A-2020 ROLL -
9389
TR
96.58
84.57
26.94
15.65
93.48 W"40'75°32N
73.32
44.191
OLIVIA LANE
PSDE
TRAIL & PUE
8' PSDE
(PRVT ST)
ASSESSOR'S MAP
CONTRA COSTA COUNTY,CALIF.
BOOK PAGE116 10
75-11
100
100 11
12
07
08
09
01
16 17 03
38
37
04
05
43
44
41
42
24
29
33
39
40
46
48
45
47
27
10
72
74
75
"A"
"B"
"C""D"
PCL "B"PCL "D"
PCL "A"PCL "C"
MYRTLE
LAUREL
1.20AC.
1.17AC.1.53AC.1.05AC.
.93Ac.
.50Ac.
.27Ac
.28Ac.
.46Ac.
1
1
1
21
2
2
2
149.93
25.5
158.30
56
7
.97
717
.90
46
0.25
S44
°39'30
"W
2°280.74
S38°15'E
100
566.20
68.26
25.00
S31°17'E 25.44
28.84 187.10100.64
57.62
31.54
286.00
225.18225.11
112.56
S28°02'E
N26°29'43"W112.55
29.28
221.70S42°25'E
.07AC..07AC.25
25
88.00
149.00
12.5' PRIV.ACCESS EASE.
10' EASE.
10' EASE.
29.75
101.89
101.89
212'
N46°08'40"W
16
0
121.25
N46°08'40"W 139.10
.94AC.
80
.00 80.00
127.00
108.30
N42°16
'E
S42
°16
'W N47°44'W
127
80
.00
80.00
.46Ac.
.48Ac.
18
3
.10
N.D.
118
.22 118.22
212'
N46°08'40"W
N42
°16
'E.46Ac.
.58Ac.
.38Ac.
29.75
54.25
31
9
.39
99.19
91.49
106.07
212.14
N44°03'56"W
S47°44'E
94.75
14
0.0 14
0
.0
106.07
N43
°51
'20
"E
N43
°51
'20
"E
20
5
.74
130.00
84.00
17
1.74
25' PRIV. ACC
ESS
EASE.
N43
°51'20
"E
373.48
13
7.74
513.39
24
5
.00
268.39
S42°16
'W
55
9
.47
N41
°58
'E
55
7
.5
S44
°40
'45
"W
177.50
19
.36
TO COUNTY 1407-OR-235 6/29/49101.89
101.89
101.89
101.89
490.00
N47°44'W
.457AC.
.457AC.
19
5
.46
195.46
19
5.46
101.89
101.89
26
7
.50
N46°8'40"W
N43
°51'20
"E
207
.04
20
7
.04
207
.04
.48AC
.48AC.N46°08'40"W
N46°08'40"W
139.10
108.30
N47°44'W
.57AC.
S43
°51
'20
"W
226.25
22
6
.25
.82Ac.
S43
°51
'20"W
16
0
'
20
1
.25
42
7
.50
.50Ac.
.51Ac.
20
1
.25
139.10
108.30
25
25
1"=100
'
12/15/15
PURPOSES ONLY. NO LIABILITY IS ASSUMED
FOR THE ACCURACY OF THE INFORMATION
NOTE: THIS MAP WAS PREPARED FOR ASSESSMENT
DELINEATED HEREON. ASSESSOR'S PARCELS
OR BUILDING SITE ORDINANCES.
MAY NOT COMPLY WITH LOCAL LOT SPLIT
AYERS RANCH SUBN MB 7-170 7/2/1912
8 7
6
5
43
2
152
51
54
55
56
57
58
53
.399Ac
.380Ac
.414Ac
.724Ac
.412Ac.565Ac.
.497Ac
.344Ac
N73°08'04"W
84.25
N16°51'56
"E
N46°10'11"W 112.07
133.33
169(T)
12.81
83.38
32.5420
LAU
REL
PLACE
50.49(T)
48.66
45.48 N46°9'54"W 88.24
N73°8'4"W
R=200
58.08 30.17
N46°9'54"W 282.56(T)
211.11(T)
183.22(T)13
4
.95
(T)
12
9.81
(T)
125.77(T)
15
3
.55(T)
N43
°50
'05"E N5°51'43"W
N74°40'24"W
52
.38
R=1158.63
237
.49
N16°51'56
"E
36
3
.36
(T)
79
.30
122
.19
133.82
S46°9'54"E
67.32 28.05N16°51'56"E
151.07
125.77(T)
N46°9'54"W
119.27
7
N43
°51'20"E 224
119.27
N43°50
'05
"E
199.17(T)
N43
°50'05
"E
N43
°50
'05
"E
1-
2-
152PM11
153PM50
4/9/1991
8/21/1991TRACT 8769 MB 517-30 (LAUREL PLACE) 8/20/13A- 2013-
A
A
A
A
A
67.32
DR
DR
PAUE
15158/771 7/30/15ROADWAY
ASSESSOR'S MAP
CONTRA COSTA COUNTY,CALIF.
BOOK PAGE117 4
116
P.B.
03
10
040
05
09
40
21
040
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
22
42
88
84
85
90
91
24
36
37
32
10
27
08
13
1
2
3
4
5 6
7
8
9
10
11
12
13
14
15
16
64
65
68
79
82
25
25
25
25
427.5'
S29°44'W
140.25'
100
100 212.93 470.1'
30
30
123.25
212.93N60°16'07"W
156.25
136.72
62.05
R=20
27.04
106.6'
S47°44'E
2530
5 93'
134.17
366.2'
125'
125'125
125
5
5
93 134.17
113.95 98'
60'
5'
N58°41'36"W113.95
136.25100
140.25'
294'
98'
98'
98'
98'
98'
294'
192.16
14.79
73.41
201.25'
S30°20'W
N.D.
25
25
R=2522.0 159.0
N58°27'24"E
210.34
107'
402.5
201.25'
294'
470.1'
78
N60°16'W
115.0094.23
5
490'N58°41'36"W
490.00
166.09
217.49
N1°35'38"E
212.07
N19°54'44"W
207.00
N47°11'50"W
127.00
97.62
98.88
6.00
N69°16'21"W 37.99
71.23
52.96
109.18
R=225
135.92
107.15
68.81
R=20
50.00 18
29.85
74.57
R=50
39.56
39.53
39.53
191.83180.03
137.26 N31°18'24"E N31°18'24"E
100.50
N58°41'36"W
140.00
128.20
159.34
127.20
63.56
79.14 N13°06'10"W
N58°26'25"W157.67 125.0
208.91
N76°15'56"E
243.90
157.97
N30°57'54"E
208.89 125.0 200'
200'N58°41'36"W
10'
35'
290'
3025
S31°18'24"E
N58°41'36"W
41.72
296.51
N76°18'24"E
30.41
92.50
132.00
N31°18'24"E
134.22
180.27149.27
163.00133.00
N31°18'24"E
163.00
133.00
151.42
136.44
N58°41'36"W
490'
94.56N58°41'36"W
R=20
40.00
N31°18'24"E
95.72
R=425
50'
R=375
73.47
40.00
R=20N31°18'24"E
31.42
31.42
17.79
105.67R=430R=380162.64
128.54
N45°47'18"W
7.70
183.63
383'S60°16'E
107'115.50 134.10
203.90
148'
180.64 19.36'
402.50
N29°44'E
19.36'
25
25
290'180.64
109.36
151.42
427.5'
S29°44'W
402.50N31°18'24"E
20030
3748 OR 237 11/22/60
MYRTLE
AYERS
1
"C"
5
5
"A"
69"D"
5
1
5
5
"C"
LAUREL
25
"2"
3
3
"1"
3
3
A
5'
PLACE
ELLARD
TO COUNTY 673 OR 155
7-13-42
A
2
2 TR 7787
MB 380-17
6-28-95
1.93Ac.
4
"A"
"B"
"C"
A 4
4
4
A
TO COUNTY 478-D-376
12-18-24
AYERS RANCH SUB'N
2-
3-
4-
5-169PM38
TRACT 5727A-1984 ROLL-
1"=200'
319
144
N58°41'36"W
N58°41'36"W
112
N58°41'36"W
43
67.10
S31°18'24"ES31°18'24"E
142.50
30.50
112
10
153.60178.60
157.50
127
102
103
104105
.51Ac
72.90
178.60
140.40
140
127
79.60
R=50.2750.27
12
14.50
176PM236-
"A"
"B"
"C"
"D"
6
6
6
142.50
157.50
5'
7
8
9
10
11
12
1
2
3
4
5
6
KARAS COURT
166
166166
166
167
171.65
186.85
172.50
155
50.21
R=40
R=20
R=20
138.60
131.70
127.20
119.17
107.09 114.86
39.50
100.50
S31°18'15"W 140
N31°18'15"E 140
N31°18'15"E
S58°41'45"E
S58°41'45"E
48.76
R=121 175.93
N11°15'W
55.64 66.58
147
125
148.40
174
176.60
120.50
124
153
60.73
33.39 41.26
112.26
120.50
120.50
125.15
86.52
111.04
87.02 137.59
145
118.60
80.11
69.33
38.84
29.89
S22°31'14"W
N31°18'15"E 397.50
135.97 75.88
188.26
R=95
N58°41'45"W
10.02
R=20
20.86
R=20
31.42
31.42
21.40
118
117
116
107
108
109
110
111
112
113
114
115
TRACT 7934B-2001 ROLL-
B
B
B
B
R=1121
R= 1079
R=79
113.22163.85
"B"
25.1025.02
PURPOSES ONLY. NO LIABILITY IS ASSUMED
FOR THE ACCURACY OF THE INFORMATION
NOTE: THIS MAP WAS PREPARED FOR ASSESSMENT
DELINEATED HEREON. ASSESSOR'S PARCELS
OR BUILDING SITE ORDINANCES.
MAY NOT COMPLY WITH LOCAL LOT SPLIT
119
122
133.38
.588Ac
.612Ac
N58°41'36"W
"A"
"B"
7-202PM17 4/11/08
2/6/63
10.37Ac
FM 75-10
9495
7/01/21
MB 273-41 (LAURELWOOD II) 10/17/1983
MB 420-26 6/2/2000
26LSM49
60PM42
70LSM45
123PM49
MB 7-170 7/2/1912
1-3/26/64
12/6/77
7/1/82
8/28/86
8/23/96
3/8/99
.70Ac
N31°18'24"E
147.0
147.0
128.0
128.0
200.0
7
7
7
7
N60°16'W
200.0
200.0
133.38
N29°44'E
N60°16'W121
ACCESS EASE
.57Ac
.57Ac
.58Ac
.46Ac
.46Ac
.46Ac
N29°44'E
DR
DR
.48Ac
.294Ac
.67Ac
.27Ac
.45Ac
.45Ac
.45Ac
131.25
201.25
131.25
99
98
100
31Ac.
.326Ac
ACCESS EASE
RD
.99Ac
1.87Ac
1.85Ac
MT DIABLO UNIFIED SCHOOL DIST
10.36Ac
1
2
3
4
5
6
7
8
126
127
125
128
124
129
123
130
.449Ac
.447Ac
.419Ac
.461Ac
.458Ac
.420Ac
.447Ac
.450Ac
194.50 N58°41'36"W
S58°41'45"E
N31°18'24"E
96.86
100.10
100.10
100.60
100.60
100.10
56.99
139.97(T)
N31°18'24"E
100.90
100.10
56.69 95.96
100.70
100.10
100.90
N58°41'36"W
194.50(T)
194.50(T)
194.50(T)
194.50(T)
137.68
136.49
194.50
72.81(T)
33.5'
EMMET PL
5
(PVT)
C
C
C
C
C-2022 ROLL-TRACT 9495 MB 546-5 (LAUREL PLACE IV) 4/1/21
TR
PVT R/W
71.32(T)
ASSESSOR'S MAP
CONTRA COSTA COUNTY,CALIF.
BOOK PAGE138 12
120
20
19
11
33120
10
13
1"=200'
Sanborn Date : 16/04/1999
PURPOSES ONLY. NO LIABILITY IS ASSUMED
FOR THE ACCURACY OF THE INFORMATION
NOTE: THIS MAP WAS PREPARED FOR ASSESSMENT
DELINEATED HEREON. ASSESSOR'S PARCELS
MAY NOT COMPLY WITH LOCAL LOT SPLIT
OR BUILDING SITE ORDINANCES.
19 18 17 16
05 06 07 08
1415
12
1109
LOT 7LOT 6LOT 5LOT 4LOT 3LOT 2LOT 1
LOT 15 LOT 14 LOT 13 LOT 12 LOT 11 LOT 10 LOT 9
LOT 8
N88^41'40"W
31
6
.
5
3
125.95
16.94
163 162.99 190 163
99.29
63.62 99.65
R=400
23.58
163
163
162.99
190
190 163
163
163
163 169.93
30
90.07
90.07
25
0
.
9
2
163163 190
51,626SF 43,475SF 43,365SF 50,543SF 43,357SF 43,353SF 67,792SF
4.125Ac
48,226SF 44,104SF 44,102SF 51,410SF 44,105SF 44,105SF 45,479SF
RO
A
D
13
NO
R
T
H
GA
T
E
N2
6
^
2
4
'
1
0
"
W
154.38
15.95
N1
8
^
3
4
'
4
0
"
W
N1
^
1
8
'
2
0
"
E
RESTRICTED
DEVELOPMENT AREA
N1
9
^
1
4
'
4
0
"
W
RESTRICTED
DEVELOPMENT AREA
R=
4
1
9
.
3
27
1
.
1
3
N1
^
1
8
'
2
0
"
E
163 173.07 430.05
163 163 260 231.33
1503.67
38
0
.
3
9
N1
^
1
8
'
2
0
"
E
25
5
.
5
8
27
0
.
5
8
26
5
.
9
5
26
5
.
9
8
26
6
.
0
27
0
.
5
8
27
0
.
5
8
27
0
.
5
8
27
0
.
5
8
27
0
.
5
8
26
6
.
0
3
26
6
.
0
8
TRACT 8824
TR
8824
9/23/09
MB 7-153 5/6/1912MT DIABLO BLVD TRACT
MB 509-21 (MERITAGE LANE) 6/24/2009
N88^41'09"W
19
1
.
7
179,686SF
83
MERITAGE LN
N21^13'20"E
14.49
32
34
8
.
5
3
1588.01(T)
N88^41'40"W
20
9
.
2
6
N1
^
1
8
'
2
0
"
E
N1
^
1
8
'
2
0
"
E
N67^58'12"E
59.90
N1
^
1
8
'
2
0
"
E
ASSESSOR'S MAP
CONTRA COSTA COUNTY,CALIF.
BOOK PAGE140 22
100-8
RO SAN MIGUEL
NO. 4 HILL LAND
40 P.M. 241-10-1-75
TRACT 65441986 ROLL-A-M.B. 291-22
172 P.M. 32-8-27-97
179
PB
25
20
21
14
23
220
ACCESS OFF OF MARSHALL DRIVE
BK. 179 PG. 22 POR. LOT 2 TRACT 2079.
02
11
12
13
14
15
16
17
18
SCENIC
EASE.
(.86Ac)
STRUCTURE
SET BACK AREA
(.77Ac)
25' ACCESS
EASE.
(.12Ac)
SCENIC
EASE.
(.61Ac)
TRAIL EASE.
(.11Ac)
(.04
Ac)
(.66Ac)
"A"
"B"
1
23
4
5
6
7.35Ac.
2.345Ac.
2.055Ac.
1.37Ac.
1.38Ac.
.98Ac.
1.01Ac.
.81Ac.
.05Ac.
(.17Ac.)
DED. TO COUNTY
A A
A
A
A
2
2
2
2
04
ARBOL
VIA
LA
CASA
VIA
MARSHALL
DRIVE
TIERRAVERDE CT.(PVT. RD.)
N27°30'E
N.D.
N72°42'35
"W
80
9
.38
158.98
22
5
78
0
183.0
S50
°E
N48
°08
'52"W
16
4
.90
(S28°01'25"W)
374.89
16
5
.0
N29°49'13"E N38°34'56"E
37.50331.39
N50
°00
'W
15
8
.15
N29°49'13"E 248.22
N53°41
'30
"W
18
7
.96
224.12
16
2
.79
N55
°45
'W
17
6
.91
347.86 N28°16'22"E
N26°28'34"E309.39
245.21
152.89
200.29
31
4
.2086
.41
5.12
46.87
N61°43'38"W
36.62
196.67
182.64
60'
25.59
N49°23'12
"W
37
.49
N28°16'22"E
S51
°11'E70
.14
280.58
219
.71
N63°31
'26
"W
N26°20'44"E
280.78
150.91
S50
°36
'E
12
1
.52
R=51
0
33.59
242.63
25
'
R=900
244.25
41.44 R=400
82.29
N21°06'33"E
46.07
R=150
51.06
N40°36'48"E
20'
N49
°23
'12
"W
22
5
N26°19'20"E 868.71
.88Ac.
11-3-97
(5-71)
1"=100'
PURPOSES ONLY. NO LIABILITY IS ASSUMED
FOR THE ACCURACY OF THE INFORMATION
NOTE: THIS MAP WAS PREPARED FOR ASSESSMENT
DELINEATED HEREON. ASSESSOR'S PARCELS
OR BUILDING SITE ORDINANCES.
MAY NOT COMPLY WITH LOCAL LOT SPLIT
AREA
DEVELOPMENT
RESTRICTED
(.91Ac)
220
3-213 P.M. 23 1-18-18
3
3
3
3
"A"
"C"
2.537Ac
"B"
.918Ac
.918Ac
7/2/18
213
PM23
321.11
182.43
203.11
302.89
182.57
182.51
182.59
182.53
22
4
.87
224
.95
N50°36'0"W
N50
°36
'0"W
225
.24
PAUE
PAUE
19
2021
ASSESSOR'S MAP
CONTRA COSTA COUNTY,CALIF.
BOOK PAGE148 17
1
1
1
1
HONEY TRAIL
DEL
HAMBRE
100'
LAS
LAS
JUNTAS
WAY
50
170
18
35
26
40
22
40'
100'
285.6
115'
N57°52'11"E
N56°17'E
115'
115'
100.66R=566.04'
N47°40'49"E
R=405.98
149.06
144.32'76.26
85'
8.44
192.42
125
N82°11'41"W ROBLE
32.00N7°10'E
113.89'
32.08
N8°44'37"E
40'
114.71'
687.82
N89°34'14"W
N32°10'18"W N32°10'18"W250.85
S57°49'42"W
S11°18'53"E
S32°10'18"E
S56°48'24"E
N57°49'42"E
1.19
5.16
4.56
4.95
.96
141.11
N32°10'18"W
N43°35'42"E
6.75
57.66
R=253
N32°10'18"W
401.44
CODE
LINE
STA. L. 795+83
FM. 43-29 7-1-64
170
RANCHO LAS JUNTAS
SUBD. 6982A-1990 ROLL CONDO MB 336-43
7-27-90
1"=100'
1 -
Sanborn Date : 23/04/1999
PURPOSES ONLY. NO LIABILITY IS ASSUMED
FOR THE ACCURACY OF THE INFORMATION
NOTE: THIS MAP WAS PREPARED FOR ASSESSMENT
DELINEATED HEREON. ASSESSOR'S PARCELS
OR BUILDING SITE ORDINANCES.
MAY NOT COMPLY WITH LOCAL LOT SPLIT
LN
JUNTAS WY
A
R
R
B
R
P
S
CT
D
T
2 -
PRO. 95LSM11
217PM14 2-9-21 (CONDO)
2
2
2
2
307.42
N8°44'45"E
258.09
N82°11'10"W
109.44
208.63
S8°44'45"W
320.39 N89°34'6"W
2.366Ac
51
"A"
"A"
7.951Ac
R=412.10
32.85
7/12/21
(CONDO)
217
PM14
ASSESSOR'S MAP
CONTRA COSTA COUNTY,CALIF.
BOOK PAGE148 48
PORS. TR2027 & TR2147, LAS JUNTAS ESTATES, RANCHO LAS JUNTAS
LA
S
JU
N
T
A
S
OAK
ROA
D
OA
K
FREEWAY
AVE.
BUSKIRK
DR
.
WA
Y
N
E
RD.
22
22
25
23
21
14
10
11
R=400
R=20
33.7
R=18
2
N5^18'36"E
31
'
47
'
55
29
2
.
8
N8
9
^
7
'
1
6
"
W
S0^52'44"W
271.53
S0^52'44"W
N8
9
^
7
'
1
6
"
W
281.0
100
'
89.
0
2
N43
^
4
0
'
1
8
"
W
R=30
0
14
7
.
3
6
113.05
N05^21'14"W
N1^23'43"E
S1^23'43"W
3.37
N.
D
.
N.D.
R=400
172.97
257
.
0
1
84.0
3
CODE LINE
R=20
19.95
68.
6
R=1
3
0
38
.
8
5
N5
1
^
5
7
'
4
6
"
E
N43
^
2
1
'
4
0
"
E
80'
R=
1
0
4
0
156
.
1
3
90.
3
3
R=90
84.4
2
7-29-98FM 148-20,22,23
480
1"
=
1
0
0
'
PURPOSES ONLY. NO LIABILITY IS ASSUMED
FOR THE ACCURACY OF THE INFORMATION
NOTE: THIS MAP WAS PREPARED FOR ASSESSMENT
DELINEATED HEREON. ASSESSOR'S PARCELS
MAY NOT COMPLY WITH LOCAL LOT SPLIT
OR BUILDING SITE ORDINANCES.
R=
1
0
7
21
.
6
3
177.
1
3
235.
9
7
229
.
5
9
N.
D
.
4.886Ac
624.89
14
11/16/09
MAP CORRECTION
2.25Ac
.205Ac
ASSESSOR'S MAP
CONTRA COSTA COUNTY,CALIF.
BOOK PAGE159 4
06
36
37
4647
45
03
02
040
100
BK
03
04
48
94
93
87
76
77
86
78
85
73
21 24
37 38 39
828191
72 71
19
CHICAGO
PORT
BATES
32
25
24 12
3
456
7
8
9
10
11
12
"A"
"B""C"
"A""B"
"C"
13
14
17
4
4
4
B
5
5
4
4 4
B
B
1
1
1
1
2
2
2
2
3
BB
3
3
4
GOVERNMENT RANCH
TRACT 7320
TRACT 7048
BK D-87
1-
2-
3-
4-
1320
425.39
361.06N21°09'15"W
7.72
CODE LINE
89
0
425.39 CODE LINE
COD
E LINE
R=1300 430
N84°14'10"W
77.71
.44Ac.
To U.S.A
65347-54
U.S.A.
11060 OR 881
.76AC.R=112'
SEE 159/45
172.06'
202.69'
N20°4'54"W
324.52'
N69°55'6"E
21'
(2.36Ac.)
N25°12'16"E
70
1
.96
102
.98
'
66.62
50
60'
189.77
N3°39'24"E
N80
°32
'23
"E
47
3.89
N79
°23
'53
"W
46
8
.0
N10°34'16"E
E. B. M. U. D.
SEE PG. 34
23
18
N9°30'E
(N9°26'10"E)
1011.42
6.96Ac.
1379.52
N10°35'09"E
(S9°32'39"E)
1285.27
1296.31
99
0
11
44
8
.29
54
54'
.09Ac
"A"
C.C.C.S.D.
15.252Ac.
2,00
5
.37'
47
6.71
10
0
2
.94
N79
°58'04
"E
N10°30'W
1277.12
CODE LINE
11.0'
N79
°30
'E
344.57'
N10°37'22"W332'
N21°38'23"W
30'
360'360'
N9°25'52"W
20
C.C.C.S.D.
166.64'
161.44'
R=532'R=600'
151.8'170'
340'
57.42'304.43'
N75
°38
'51
"E
42
4
.19
'
N20°4'54"W
387.48'COMMERCIAL CIRCLE
10.24'
181.91'
N80
°34'8"E
425
.24
'
R=932'
R=1000'
163.01'162.32'
N9°25'52"W
78'107.89'162.32'
41
2.29
L=31
.42
'
R=20
'
N80°34'08"ER=20
'
L=31.42
'
43
8
.83
'
11.0'
N80°34
'8"E
41
0.1'
174.25
295.08'174.25
174.25
335.62'
N69
°55'6"E
400'
340'
319.74'
378
.49
'
S.D.E.
(1.46Ac.)
501
.2'
113.74'231.41'
N80
°34
'21
"E
244
.23
'
N65°55'6"E
10'
"A"
R=30
51.56
S. E. COR. PCL. 23
84 OR 67
174.78
160.92451.19N18°58'35"W
11.19
199.65
237
.85
152.24S68°50
'45
"W
244.42
S68
°50
'45
"W
249
.99
115.82
S68
°50'45
"W
N68
°50
'45
"E175.25
1.0Ac
58.46
249.99
24
9
.99
174.25
174.25
1.0Ac
10
.18
10 1046.7120
To COUNTY
.011Ac.
N68
°50
'45
"E48.29
1"=40
0'
N10°37'43"W
TRACT 5624
M.B.235-24
2-26-80
76
R=1538.05
S79°30
'W
Sanborn Date : 12/15/1998
68.60
40
.70
NB
.989Ac .964Ac .933Ac
577.90
FM. P.G. 44 & 45
10
11
R=20
N10°35'38"E 491.53
170.98
67.96
R=132
26
1.48
N84°57'33"W
295.86
N80
°34
'8"E
83
8
.89
40.59
329.73
R=116
191.87
N55°27'33"W
41
7
.48
FROM PG 47
F-15
E-15
N10°34'30"E 449.2
PURPOSES ONLY. NO LIABILITY IS ASSUMED
FOR THE ACCURACY OF THE INFORMATION
NOTE: THIS MAP WAS PREPARED FOR ASSESSMENT
DELINEATED HEREON. ASSESSOR'S PARCELS
OR BUILDING SITE ORDINANCES.
MAY NOT COMPLY WITH LOCAL LOT SPLIT
475.12
41.36
229.28
44
9
.72
177
.16
5-
5
5
"A"
"B"
N69
°55
'6"E
N20°4'54"W
N21°9'15"W
S21°9'15"E
S20
°9'49"E
N21°10'W
N80
°5'13
"E
A-
B-
DEAN LESHER
DR
R=20
17.12
R=166
33.0 261.10
N20°2'23"W
45
.93
R=45.93
112.48
45
9.37
188.07
R=234
536.84
79
3
.67
6.549Ac
N84
°58'1"W
R=20
0
R=234
102.43
45.4949.9
285.7
R=375R=307
191.87
351.91
R=90
25.26
040
07/28/14
N20°19'49"W 569.50
95
11/8/1884
MB 336-26 (REVERSION TO ACREAGE) 8/18/1989
MB 353-13 (NORTH POINT BUSINESS PARK) 10/30/1990
6/7/72
6/14/74
12/28/77
3/30/76
12/18/00
55LSM8
57LSM9
60LSM34
63LSM46
180PM7
BP & C RR
SNRR
HWY
TR 5882
9/13/88
MB 325-18
272.35
43.30Ac
73
3
.0
192.53
S9°54'47"E
R=44.5
99.61
19.99
R=20
4.46
9.747Ac
.07Ac
5.736Ac
7.74Ac
2.18Ac
5.0Ac
AV
E
19.09 Ac
3.94Ac
5.65Ac
2.88Ac
3.43Ac
3.63Ac
3.22Ac
2.98Ac
95 2.385Ac
244
.23
68.61
327.96
10
25
0.02
441.72
ASSESSOR’S MAP
CONTRA COSTA COUNTY,CALIF.
BOOK PAGE161 28
ROADMIDHILL
GI
L
D
A
AV
E
.
20
’
R
/
W
20
’
R
/
W
40
.
0
315.97
N89^09’30"E
45
.
0
40
.
0
115.04
N1
^
0
0
’
0
0
"
W
84
.
1
0
111.98
122.00
N88^43’30"E
82
.
0
0
17
6
.
1
0
82
.
0
0
N1
^
0
0
’
W
75
.
0
2
122.00115.04
545.51
298.47
N88^43’30"E
N.
D
.
N.D.
514.57
12
0
.
0
N1
^
0
0
’
W
10 68.0
195.0
"B"
DR
.
RANCHO LAS JUNTAS
1-7/3/68
2-2/24/65
3-11/10/65
9/4/73
6-8-23-76
7-
A-1991 ROLL-TRACT 7322
44
453642
43 40
41
30
03
15
33
07 14
12
13
05
"A""A"
"B"
"A"
280
.22Ac.
"A"
"B"
2
4
7
653
15
37
6 1111
187.99
N89^38’48"W
82
.
7
2
N0
1
^
3
6
’
0
"
E
8.
2
9
’
57.44’
37.97
’
100.11’
N84^31’44"W
N80^19’49"W
N66^4
8
’
4
"
W
N66^4
8
’
4
"
W
N80^19’49"W
53’
35’
96
.
4
6
’
25
.
0
4
’
50
’
97
.
9
’
22
.
8
6
10
2
.
1
4
98’
(N88^50’E)
85’
N0
^
1
7
’
2
0
"
W
437.97’
130.98
N6
^
2
4
’
4
7
"
E
86
.
9
’
N6
^
8
’
4
8
"
W
13
.
5
’
119’
13
0
.
4
1
’
60
’
70
.
4
1
’
40.0
20’
N0
^
3
1
’
1
2
"
E
N67^
4
5
’
5
9
"
E
N83^51
’
1
2
"
E
27’
10’15
’
88.5’
N89^38’48"W
N89^28’48"W
47
.
8
’
104.7
5
’
L=1
1
4
.
3
9
’
24’
R=8
5
’
N77^27’
3
2
"
E
59.64’
9.49’
64.85
N6
^
8
’
4
8
"
W
20
’
R=20’
30.89
’
19
.
1
3
’
11
3
’
N1
2
^
1
6
’
1
7
"
E
N89^38’48"W
487.56
294.55’N7
0
^
5
7
’
3
8
"
E
12
’
11
3
.
0
R=1
7
2
’
L=
1
3
3
.
7
7
’
R=
2
2
8
’
N8
9
^
3
8
’
4
8
"
W
22
.
6
1
19
7
.
1
9
N4
^
4
7
’
E
95
L
S
M
1
8
8-
7
-
9
0
307.44 N88^43’30"E
497.34
N88^43’30"E
200.0
200.0
80
.
0
S1
^
0
0
’
W
N1
^
0
0
’
W
80
.
0
10’
10’
17
0
’
88
0
.
2
8
S0
^
5
0
’
E
N1
^
W
5.0195.0
12
0
.
0
N1
^
0
0
’
W
5.0
127.0
N88^43’30"W
N46^07’53"W-14.11’
34
86
.
6
0
10’
10’
R=10.00 40’
17
6
.
1
5
N1
^
0
0
’
W
N4
^
4
7
’
E
17
3
.
8
2
17
0
.
9
5
’
280
From 161/16 V.P.
11
5
.
1
7
A
A
A
A
DE
D
.
T
O
C
O
.
101.3
4
’
A
6
7
7
7
7
1
6
1
5232
2
6
1
1
2 3 5 5
6
1"=100’
1
Sanborn Date : 14/05/1999
3/5/07
PURPOSES ONLY. NO LIABILITY IS ASSUMED
FOR THE ACCURACY OF THE INFORMATION
NOTE: THIS MAP WAS PREPARED FOR ASSESSMENT
DELINEATED HEREON. ASSESSOR’S PARCELS
MAY NOT COMPLY WITH LOCAL LOT SPLIT
OR BUILDING SITE ORDINANCES.
POR DIVISION "A" ESTATE OF JOHN KELLY
4PM15
33LSM2
38LSM17
29PM45
47PM28
54PM18
5-
1.23Ac
.46Ac
.23Ac
1.87Ac
1.96Ac
1.97Ac
.523Ac
.37Ac
4-20-77
(MIDHILL HEIGHTS)MB 347-1
3.02Ac
.265Ac
.299Ac
.309Ac.252Ac .339Ac
.280Ac
KITTIE LN
.014Ac
58.0
N88^43’30"W
MA
R
I
E
MA
R
T
I
ASSESSOR'S MAP
CONTRA COSTA COUNTY,CALIF.
BOOK PAGE161 55
550
550
48
0632
28
15
15
RO
AD
M
IDHILL
MIDWAY DRIVE
MIDW
AY FORSYTHIA
W
AY
MEDFORD COURT
TRACT 6959
TRACT 7113
A
AA
A
A
A
01
02
03
04 05
06
07
08
09
10
11
12
13 14
15
16
17
18
19
20 21 22 23 24 25 26 27
28
29
30
31
32
3334
35
36
37
3839
40
41
42
43
1
2
3
4 5
6
7
8
9
10
11
12
1 2
3
4
5
6
7
8 9 10 11 12 13 14
15
16
17
18
19
20
2122
23
24
25
2627
28
29
30
31
N77°05'52"E
138.78
249.14
110.36
36'
100.33
68.17
48'
40'
156.05
S72°21'40"E
8.22
135'
97.70
S89°30'08"E
211.17
120'
76'
76'
135'
N0°29'52"E
N0°29'52"E
77.37
125.0315.68
67'
R=10'
N0°29'52"E
120.25
85'87.39
297.42
18.24
60'
R=10'R=10'100.37
54.87
36.28
N81°38'48"E
128.4626.88
9.52
R=174'
R=226'
56.46
52'
N13°48'56"W
37.49
R=20'
R=20'8.02
7.67
9.52
79.67
164.67
48.77
85'
R=45'35'
35'
20.72
35'
211.98
148.91
111.38
N81°38'48"E
62.20
N61°35'52"E
45'
58.90103.90 56'N60°35'52"E 62.90
110.02
N0°29'52"E
N12°38'23"W
105.72
183.75
N66°21'52"E
50.10
82.57
36.62 131.89
65.37R=72'59.90'
33.50
56'
R=128'
129.16
68'
63.79
139.05
185.94
N0°29'52"E
133.61
63'
63'
N0°39'52"W
12.25
185.76134.25
67.25
60.02
185.02
60'
48.12
R=228
190.64
N89°20'08"W
N89°20'08"W
N89°20'08"W
131.3682.49
14.14
56'
66'
92.49
150.04
N44°04'41"E
117.48
14.14
55'
65.24
65.24
56'
9.2410.24
187.29
321.54
197.48
8.04
42.36
R=172'
R=228'
56.16
64.83
99.38
R=172'
42.36
21.42 104.57
114.55
63.39
76.70
67'
N0°29'52"E
81.77
65'
67.2567'
97'
185.02 185.02N89°20'08"W
SLOPE EASE.
10'
133'
346.86
98'
N1°09'21"W
149.49
N52°34'57"W 116.99
R=25R=25'
18.86 18.86
42.27
30'
32.3731.75
R=45'30'
42.89
209.28 90.30
N78°15'13"WN79°46'25"E
90.02
9.98 97.06
N87°33'14"W
64.02
61'
65.80
97.57
N1°09'21"E
N1°09'21"E
61'
61'
72.82
N0°39'52"W
105.50
57'57'57'57'58'
38'59.90'59.90'59.90'59.90'
N0°39'52"W
105.50
N0°39'52"W
105.50
N0°39'52"W
105.50
N0°39'52"W
105.50
N0°39'52"W
325.90
182.54
52'
14.14
55.83
65.80
143.05
114.55
65.83
70.63
104.54
16.09
48.30
R=45'27.53
47.18
128.99
R=20'31.59
78'
114.48
113.83
52.83
50.46
52'
7.77
8.32 105.63
N88°50'39"W
107'
107'
N1°09'21"E
493.33
61'
N88°50'39"W
N88°50'39"W
56'
78.52
114.85
N31°40'40"E
N67°56'57"E
105.15
105.18
93'
97.24
N0°39'52"W
5.97
1"=100'
130
129.61
134.25
85
60.52 72.05
N78°45'6"W
83.68
66.61
114.87
47
46
45 "A"
"B"
"C"
181PM34
1 1
1 1
FROM PAGE 15
19.38
"A"
66.14
5.76
33.50
N89°20'08"W
A-
N89°20'8"W
N89°20'8"W
N89°20'8"W
N89°20'8"W
N89°20'8"W
N89°20'8"W
N89°20'8"W
N89°20'8"W
N43°9'12"E
S89°30'8"E
13.18
N43°9'12"E
N89°20'8"W
N89°20'8"W
N89°20'8"W
N89°20'8"W
N89°20'8"W
N89°20'8"W
N89°20'8"W
14.14
FM PG 15 7/25/89
MB 332-4 (MIDHILL RIDGE) 3/29/1989
MB 335-40 (WINCHESTER PLACE) 8/8/1989
10/5/20011-
.248Ac
.40Ac
.232Ac
PLACE 100' PG&E EASE
1/22/24
FORSYTHIA
PROVIDENCE
DR
DR
MIDWAY
COURT
PURPOSES ONLY. NO LIABILITY IS ASSUMED
FOR THE ACCURACY OF THE INFORMATION
NOTE: THIS MAP WAS PREPARED FOR ASSESSMENT
DELINEATED HEREON. ASSESSOR'S PARCELS
OR BUILDING SITE ORDINANCES.
MAY NOT COMPLY WITH LOCAL LOT SPLIT
B-POR TR 9545 MB 555-20 (HERITAGE VIEW) 12/14/23
B
B
B
1 2 3 4 5 6 7 8 9 10
11
12
13
14
15
16171819
20
2122232425262728"A""B"
"E"
"G"
"F"
"D"
29303132333435363738
86
85
48 49 50 51 52 53 54 55 56 57
88
767778798081828384
75
58
6259
60 61
63646566678768697071727473
89 90
N89°20'8"W
N89°20'8"W
702.56
45.62 64.88 64.87 74.8
64.88 64.87 74.3465.42
R=25.5
23.06"H"
PUB R/W
DED & ACCEPTED
M
IDHILL
ROAD
91
TR
9545
604.33
603.6N89°20'8"W
96.19
23.06R=25.5
N89°20'8"W
45.71 64.88
10,643SF
30,796SF
6,005SF
6,004SF
6,001SF
6,047SF 6,046SF
6,000SF
64.87 74.34
N89°20'8"W 64.9
64.4
N0°29'52"E
N0°29'52"E
82.38 92.11
92.11
73.76
62.18
82.76
92.5
93.2
92.5
93.2
116.10 65.2
65.2
92.11
65.2
65.2
65.2
65.2
65.2
93.2
92.5
64.9
64.9
64.9
64.9
64.9
64.9
64.4
636.76
46.74
6,006SF 6,006SF 6,006SF
6,006SF 6,006SF
6,928SF
6,919SF 6,003SF
6,002SF 6,002SF
64.4 64.4
64.9
6,003SF 6,003SF
6,002SF
6,003SF 6,003SF 6,003SF
64.9 62.09
64.464.4 32.53 30.15
92.37
90.86
64.9 64.9
64.8664.464.4
93.2
N0°39'52"E
N0°39'52"E
N0°39'52"E
N0°39'52"E
N0°39'52"E
6,045SF6,002SF6,002SF
6,003SF
92.11
N0°35'59"E
N2°43'40"E
N0°35'59"E
N0°35'59"E
N0°35'59"E
N0°35'59"E 65.265.2
N0°35'59"E
92.11
R=181.5
6,006SF 6,001SF
65.2 65.2 65.2 63.4
15.8651.0165.265.2
9,986SF
8,037SF
8,036SF 8,034SF 8,040SF 8,040SF
96.06 64.54 60.06 60.01 60.02 60.06
60.02 58.3660.0152.10
6,756SF
6,754SF
8,586SF
6,744SF
6,371SF
64.02
94.15
112.74
110.78
36.03
42.34
50.56
43.2
R=27.5
106.82
46.05
51.39
28.38
28.79 R=233
46.27
81.15
20.87
R=200
R=214.5
90.23
N2°43'40"E
92.76
121.89
N0°35'59"E
N0°35'59"E
N0°35'59"E133.62
133.85
133.91
133.98 124.05
10.14
N89°20'8"W
6,189SF
40.05
23.21
29.05
25.88
R=85.5
N0°53'W
N4°53'W
86.39
R=31.5
43.62
57.17
54.89
R=64.5
58.01
N4°53'W
N89°20'7"W
N89°20'8"W
N89°24'1"W
N61°45'51"W
80.59
24.85
N0°35'59"W
N0°35'59"W
77.58
39.27
R=25
40.16
N89°24'1"W
N89°24'1"W
33
26.0939.72
R=200
230.49
61.1
N2°54'W
N4°55'18"W
34.19
ECHOLS LN
ECHOLS DR
ECHOLS DR (PVT ST)
(PVT ST)
ECHOLS CT
ASSESSOR'S MAP
CONTRA COSTA COUNTY,CALIF.
BOOK PAGE166 01
TRACT 6475
M.B. 303-46
13866/852 8-28-87
39
31-11
21
24
167
P B
32 02
25
010
365
P B
"A"
"B"
"C"
"D"
11
40
41
14
15
26
32
33
34
02
03
17
18
09
19
29
30
27
"A"
1.029Ac
.856Ac
"B"
"C"
.55Ac
5
52
5
5
4
5
5
5
1
1
.77Ac
B
1
B
"A"
.50Ac
.60Ac
.61Ac
"C"
"B"
3
B
3
3
B
3
ROAD
N54°48'15"E
N46
°44'24"E
186.25108.97
N33°40'E
78.00
139
.36
106
.68
16
40.69
111.16
N27°33
'34"W
59
.04
117.23
N56°17'45"E
241
.69
N34°44'50"W
N34°44'50"W
163.75
S35°25'40"E
203.78
N35°25'40"W
101
.33
77.38
69.14
S32
°40
'50
"E
TO C.C.C0.
DEV. RIGHTS TO C.C. Co
R=520
87.05
39.10
64.99S59°36'30"W
1.59
38
7
.14
81.51
268.94
N74°53'35"E
29.96
N39°57'38"W
R=42
0 188
.56
254
.24
N54°23'55"E
N33°0'53"W
N33°12'34
"W
293.50
(.27Ac.)
(.04Ac)
(.30Ac.)
(.14Ac.)148
.82
322.98
N36°54'32"W
261.43
N57°26'19"W
N57°32'06"E
74
.19
151.37
267
N50°33'E
N54°25'32"E
115.00
165
.47
R=50
0
49.31
129
.69
N44
°54
'E
R=200
25
6
.56
90.12
R=975
.74
193.91
126.68
18
2
.58
N8°28
'42"E
309.12
N66°46'15"E
N65°14'02"E217.64
121.7
N47°39'55"W
145.06100
51.86
N73°25'35"W 112.24
31
N21°5'14"W
168.82
N88°30'48"W
143.53
N88°42'42"E
N0°56'53"W
COD
E LINE
152
.61
R=530
25
5
.62
R=500
.37Ac
69
.29
10
55
43.86
A
A
453.44
N88°36'38"W
N50°50'15"W
N40
°08
'37"E
- 277
.55
160
.24
N25°41'20"E
R=190
119
.36
PARCEL "A"
10.91Ac
R=135176.65
R=95
115.91
R=40
5113.16
R=45'
64
.29
40
9.51
N7°51
'11"E
456.31
491'
(966.55)
850
.65
N13°36'10"W
2.89Ac
(893.72
)
N27
°01'08"W
250.48
N28°05'33"E 36.19
A
A
427.40
N88°36'38"W
POR. LOT 1
A
RO. LAS JUNTAS
RO. CANA
DA DEL HAMBRE (Southern Part)
VA
LLE
Y
REL
IEZ
RANCHO LAS JUNTAS
RANCHO CANADA DEL HAMBRE
29P.M. 141-1974 7-31-73
2-75P.M.26 & 27 4-4-79
3-112 P.M. 7 9-20-84
4-2-10-86
5-80L.S.M.3 6-9-86
TRACT 6475A-1987 ROLL M.B. 303-46"HASLEMERE" CONDO.
SLOPE DED. TO COUN
TY
A
(S15°E)
121 P.M. 7&8
R=100
DEV. RIGHTS
55.78
(S81°32'15"E)
1"=200'
LC 25.00 EASE.
(.12Ac)
(.12Ac)
(.08Ac)
N38°35'07"W
42
TRACT 6844
08-28-02
B-2003 ROLL POR TRACT 6844 M.B. 446-33
B
B
14
13
11
45
2
.11
N17°59
'36"W
98.4
81.8R=60
88.6
68
R=145
158.74
N76°17'29"W
40
R=43
206
.06
N23°17'32"E
N33°4'23"W
R=580
46.16
21.53
MB 446-33
133
.21
R=580
25.86
87.25
82.57
.66Ac
.66Ac
23
0
.32
R=320.00
169.81
125
.19
N41°54'24"W121.17
79.97
N47°06'55"W
18.23
N79°39'43"W
62.65
N47°06'55"W
148.6
PURPOSES ONLY. NO LIABILITY IS ASSUMED
FOR THE ACCURACY OF THE INFORMATION
NOTE: THIS MAP WAS PREPARED FOR ASSESSMENT
DELINEATED HEREON. ASSESSOR'S PARCELS
OR BUILDING SITE ORDINANCES.
MAY NOT COMPLY WITH LOCAL LOT SPLIT
REL
IEZ
VA
LL
E
Y RD
ARB
OR VIEW LN1
2
3
4
5
6
7
8
9
42
43
.421Ac
.328Ac
.524Ac
.90Ac
.85Ac
.698Ac
1.153Ac
.567Ac
.509Ac
N28°04
'54
"W
N32°28'01"W
387.41
S55°42'26"W
N55°25'08"E
N43°09'19"W
137
.77
43.22
113.03
135
.43
S22
°28'39"E
71.51
157.13
108
.12
55.74
91.32
102.28
138.06
R=36.50
33
.02
55.69
52.84
R=39
73.22
143
.67
59
.82
N22
°03
'47
"E
34
7
.62(T)
14
2
.07
14
5
.72
52.07
S60°47'46"E
137.97(T)
S66°43'51"E
180.05(T)
184.87(T)
N76°33'14"E
N34°15'30"W
CODE LINEN61°51'42"W152.05
268.10(T)S65°07'57"E
56.92
N42°56'28
"E
150.34
235
.54
31.28
66
.07
R=180
117
.71
R=75
.99
63
.12
47
.37
26.22
R=165
24.14
S19°14'53"E
C
C
C
C
C
C
C-2015 ROLL TRACT 9174 M.B. 520-1 (ARBOR VIEW ESTATES) 4/18/14
44
45
46
47
48
49
50
326.78
.73Ac
5.720Ac
1.12Ac
1.29Ac
1.35Ac
N58°57'30"E 422
.80
47.00
.591Ac
17.94Ac
17.94Ac
N17°23
'"W 160
.04
S65°00'W 22.60
S14°29'40"W 46.94
S3°51'E 53.91
S40°59'E 44.02
N77°13'38"W 947.31
N10°00
'07"E 45
5
.60
N12
°13'04
"E 82
9
.62
N12°8'51
"E 82
9
.70
B
40.07
N07°34
'45
"E
33
4
.42(T)
N65°21'55"E 190.18
138
.60
N23
°17'32
"E 208.50
10
9
8
N4°29
'55
"E 45
8
.75
19.24
38
6
.81
42.6
56
34
36
N89°33'51"E 27.35
38.61
110.59
S44°38'50"E
7.288Ac
57
"B"
15 58
.633Ac
12
N85°17'59"E 177.77
165
S46°28'41"W
67.44
148.15N62°11'39"W
52
5.06(T)
143
.05
S22
°35
'12"E
S2°28
'30
"W
35
9
.14
107
.60
S14
°26'32
"E
R=101
34.11
77.09
190
.08(T)
24.74
"A"
SCENIC EASEMENT
EASEMENT
SCENIC
EASEMENT
SCENIC
ACCESS
28
EASE ACCESS
EASE
56-58
12/14/17
ASSESSOR'S MAP
CONTRA COSTA COUNTY,CALIF.
BOOK PAGE166 21 TERRACE
277.95
N52°14'13"W
217.95
355.85
221.09
N38°45'15"E
92.44
R=125
95.41
N3°37'W
292.21
196.80
14.82
26.03
103.11
S62°39'E
40.420.79 93.55
6.7
62.87
234.2
25.20
S53°54'E 140.65 25.71
61.2
25.23 S45°34'E 116.5
128
3'
S50°32'E 123.39
127.54
205.14204.58
S39°58'58"W
N40°16'29"E
142.00
213.00
S35°30'W
794.35
771.8
N35°30'E
76.40230.64
N76°02'W
N35°28'E
502.80
88.39
EAST
298.87
39.81
187.1
02 13
A
4
3.66Ac
10
5
210
172.14
S31°41'W
171GLORIA
22
.63Ac
09
06
12
11
24
01
20
210
31-10
BROOKWOOD ACRES
RANCHO CANADA DEL HAMBRE
A-
1"=100'
A
(N)
14
N88°36'38"W
393.88
581.30
N43°54'E
158.58
S51°44'33"E
397.14
400.47
MB 9-217
114.58
N37°40'52"W
204.61
25.23
195.46
187.51
34
16
1.17Ac
1.18Ac
.75Ac
.75Ac
1.29Ac
2.153Ac
.51Ac
50.00 40.00
N87°15'E 70.00 35.00 19.5
N45°21'E 299.79
N49°36'E 379.14
PURPOSES ONLY. NO LIABILITY IS ASSUMED
FOR THE ACCURACY OF THE INFORMATION
NOTE: THIS MAP WAS PREPARED FOR ASSESSMENT
DELINEATED HEREON. ASSESSOR'S PARCELS
OR BUILDING SITE ORDINANCES.
MAY NOT COMPLY WITH LOCAL LOT SPLIT
1
2
4
5
6
7
8
9
N25°38'46"W 415.83
225.18
190.65N45°07'44"E
N46°19'01"E 146.90
N46°00'00"W 239(T)
97.61(T)
141.39
N45°57'04"E 302.09
125.96 N50°55'04"E
N50°55'04"E 288.04
145.87 S46°53'58"E 22.74
15
153.61
83.98
(N45°50'57"W) 129
N44°18'20"W 210.61
(195.00 N40°32'E)
S42°17'03"W 163.07
49.92
S49°14'50"E
158.80
35.71
S40°52'29"E 130.64
133.48(T)
N30°00'00"E 160.44(T)
137.24
N43°00'00"E
37.10
90.90
53.14
107.30
N50°42'51"W 203.22(T)
N46°29'19"W 153.03(T)
N47°55'23"W 212.04(T)
N66°26'53"E 223.89
N28°52'20"E 224.63
05.34=R
17.57
37.53
95.79 E"83'73°24N89.93
36.38
42.16 02.57
5.792=R
92.04
26.401 E"41'32°05N
05.35=R
)T(12.151
31.97
80.27
R=350
127.23(T)
81.73
45.50
121.35
R=439
110.76
123.21
18.2
N41°47'11"E
110.08
30.11
R=305
S42°04'37"W
26
25
24
18
19
20
21
23
.519Ac
.546Ac
.587Ac
.888Ac
1.600Ac
.881Ac
.658Ac
1.430Ac
22
B- 2022 ROLL-TRACT 9429 MB 547-33 (GLORIA TERRACE ESTATES) 6/29/21
B
B
B
B
B
B
B
9429
TR
7/12/21
34
31
THE
NINES
EHT
SENIN
(UTILITY ACCESS EASE.)
(PVT STREET)
)TEERTS TVP(
103.95
N67°00'00"E 128(T)
R=439
90.70
15
78.06
FOR ROADWAY
5' DED. TO COUNTY
.574Ac
)TEERTS TVP(
3
ASSESSOR'S MAP
CONTRA COSTA COUNTY,CALIF.
BOOK PAGE166 24
POR.LOT 1 TRACT 6475 MB 303-46 "HASLEMERE"CONDO.
5-6-12-80
4-9-7-79
3-3-6-73
2-
1-
BROOKWOOD ACRES M.B. 9-217
31-7 & 10
240
21
23
01
39
240
GLORIA
TERRACE
RELIEZ
V
ALLEY
RD.
19
20
21 16
26 32
33
29
3031
22
24 35
34
11
12
05
POR. LOT 1
.95Ac
.938Ac.
.57Ac.
.62Ac.
.54Ac.
.47Ac.
.52Ac.
.59Ac.
.62Ac..48Ac.
.482Ac.
.455Ac..489Ac.
.36Ac..35Ac.
.30Ac.
.33Ac.
"A"
"B"
"C"
"C""B"
"A"
"A"
"C"
1
2 3
A
B
C
D
A
B
D
E
EL
CAJON
A1
15
A
A
A
1
1
3
3
2
2
4
4
4
4
4
5
5
5
191.60
117.0
127.16
20.28
N89°55'35"W
46.02N9°52'E P.G. & E R/W
N.D.
111.99
131.47
124.13
N84°19'30"W N.D.
S7°10'45"W
291.3
113.78
N9°34'E N.D.
N9°52'E
N.D.122.01
129.62
N13°37'02"E
N.D.
128.91
N68°22'02"W
93.17
88.99
45.00
40.94S66°22'02"W 11
N8°32'29"E
13.90
N8°43'16"E
1.77N78°36'41"W100.23
N1°23'49"E N18°37'05"W
221.20
23.95
10.07
114.72
119.72
N20°33'E
N15°E
N.D.
110373
125.59
5
S75°18'E
S67°16'E
S68°56'E
202.8 25.69 S68°56'E
265
27.02 13.6
20.23
86.90
S85°27'E
N69°31'E
163.7
26.03
14.82
35.12
85.60 91.69
N3°37'W
N3°37'W
121.23
376.13 292.21
83
297.92
201.27
42.33
R=175
572.3
92.44
R=125
4
60.25 ?
79.32 ?
163.89
N38°45'15"E
221.09
205.78
213.2
106.50
213.
213.12
EAST
106.62
127.99
255053.99
N88°34'07"W
223.91
192.66
N0°45'45"W
N88°46'10"E
25.00
N1°13'50"W
15.00
37.44R=20
56.64
N71°30'E
N71°30'E
21.00
27.19
96.08
R=20
25.39
25.71
34.16
N1°13'50"W
66.56
25.68
N7°52'30"E
N7°52'30"E
187.34'
EAST
196.49'
94.59
204.24
N68°56'W
WEST
184.00 125.00
80.60
EASTN89°14'15"E
203.95
219.53
(.12Ac.)
RW
PROPOSED 25' EASE.
N0°44'15"W
S83°09'03"E
M.B.-167
1"=100'
49.75S83°39'W
53.70
S32°13'W
91'
25.05
121'
124.90
135.33
135.33
187.34
85'
A-
6-16-65
12-7-65
PURPOSES ONLY. NO LIABILITY IS ASSUMED
FOR THE ACCURACY OF THE INFORMATION
NOTE: THIS MAP WAS PREPARED FOR ASSESSMENT
DELINEATED HEREON. ASSESSOR'S PARCELS
OR BUILDING SITE ORDINANCES.
MAY NOT COMPLY WITH LOCAL LOT SPLIT
WEST
202.41
(N1°15'W)
72.22
S85°27'E
N69°31'E129.82
26.43
33'
N47°15'W
(.056Ac)
(.074Ac)
35LSM18
38LSM38
26PM43
80PM32
86PM42
186.46
160
230.55
S88°18'45"E
(228.9)
177.94
109.72
N0°13'12"E
17.86
N9°19'32"E
143.79
5.14
170.4
"A"
"D"
"C"
"B"
N71°32'0"W133.12
69.75
N35°58'20"E
33.70
50.30
N7°32'E
84
38.60
N65°55'W
213.60175
139.49
N21°55'20"E
25.02
N65°48'58"W
74.69
N67°28'58"W
195.03
N68°W110.58
195.55
50
N0°13'12"E
177.94
39
40
38
37
1.045Ac
.727Ac
.659Ac
.622Ac
5/27/21
217
PM32
6-217PM32 4-28-21
6
6
6
6
R=1243
86.40
ASSESSOR'S MAP
CONTRA COSTA COUNTY,CALIF.
BOOK PAGE169 15
TO CO 6641-56
N56°53'E
N25°31'E
N69°11'42"E
S68°24'E
S48°38'W
S57°30'E
140.3
S38°57'W
161.6
85.8
S26°08'W
352.8 100
TO
COUNTY
3794 OR
145
1-30-61
252.8
S5°18'W
279.5
R=1955.30
N10°54'41"W
S2°00'44"E
S25°26'34"E
137.22
137.58
S11°14'28"W
S32°20'45"W
122.01
N6°33'00"E
116.09
158.33
N13°05'39"E
192.05
S36°58'48"W
N49°33'19"E
98.61
21
150
13
ROAD
HILL
14
PLEASANT
150
20
18
REUSCHE RANCH SUB'N
1"=100'
ROAD
175
PB
1957 R.J.C
SHULGIN
(PVT)
N23°38'32"W 103.30
86.24
N73°49'32"W 105.70
PURPOSES ONLY. NO LIABILITY IS ASSUMED
FOR THE ACCURACY OF THE INFORMATION
NOTE: THIS MAP WAS PREPARED FOR ASSESSMENT
DELINEATED HEREON. ASSESSOR'S PARCELS
OR BUILDING SITE ORDINANCES.
MAY NOT COMPLY WITH LOCAL LOT SPLIT
53.57
N88°13'32"W
N85°11'32"W 360.00
N88°11'31"W 172.00
N88°11'32"W 175.00
N87°41'08"W 110.06
N88°21'34"W 119.57
S03°10'E
N31°14'32"W 150.60
23.27
N56°44'19"E 159.52
N38°14'01"W 187.35
N22°08'16"W 143.67
N43°48'28"E 149.18
N67°20'28"E 119.90
N62°53'24"W83.00
N01°20'58"E 110.25
N07°47'58"E 101.30
N52°42'02"W 141.49
N32°24'02"W 315.02
N44°03'32"W
N73°33'32"W 134.90
N41°28'32"W 105.80
N67°52'32"W
56.22
107.6(T)
N30°59'45"E
81.92
55.30
N51°29'27"E 167.26
N09°10'58"E 87.13
N23°04'21"E 39.34
80.28
47.93
N23°17'32"E
N02°18'21"E 174.41
N00°20'36"E 89.83
N10°11'03"W 170.55
39.42
N20°19'09"E
38.69
N16°53'37"W 111.96
31.35
R=100
20
08
09
5.63Ac
N88°32'32"W 432.60
4
3 2
1
13
12 16
15
140.01
101.56
N88°55'51"W 271.79(T)
N87°24'13"E 327.21(T)
204.45
67.09
83.51
N88°04'37"W 181.03(T)
146.94(T)
25' PRIVATE R/W
WAY
DIABLO VISTA
82.62
176.89
TRACT 9442
MB 8-187 10/15/1915
A- 2021 ROLL-MB 544-11 (LAFAYETTE OAKS - PHASE 1) 11/2/20
WITH TR-9442
NOT INCLUDED
A
A
A
82.40
189.39
121.83
205.38
118.47 1.10
EASE.
SCENIC
EASE.
SCENIC
15
159.41
228.15(T)
142.36 S1°04'09"W
1.170Ac1.150Ac
1.275Ac
1.006Ac
S88°08'51"E 118.78
N78°45'38"W
1.110Ac
7/26/22
65.57
N50°15'5"W 102.63
307.13(T)
N01°36'57"E
266.45(T)
N88°55'51"W
S01°30'41"W
82.63
26.65
44.16
S51°57'26"E
N88°55'51"W
318.34(T)
S25°08'54"W
88.89
130.22(T)
41.33
47.97
68.86
R=50
R=50
32.15 158.78
78.67
50.60 35.15
86.70R=100 N80°48'19"W
47.45
N31°8'56"E
74.60(T)
N89°04'35"W 187.18(T)
N16°21'59"E
154.28
S58°46'2"E
9.71
85.82
N58°54'32"W 187(T)
101.18
N23°38'32"W
17.06
N38°14'1"W
10.47
N0°16'19"E
91
3.87S89°3'22"E
8.18N10°11'3"W
N2°34'11"W
21.68
60.37
19
18
17
22
21
"4"
"3"
"2"
"1"
"6"
"5"
.931Ac
.950Ac
.992Ac
EASE.
SCENIC
EASE.
SCENIC
EASE.
SCENIC
EASE.
SCENIC
EASE.
SCENIC
EASE.
SCENIC
SCENIC EASE.
SCENIC EASE.
TRACT 9590B- 2023 ROLL-MB 551-09 (LAFAYETTE OAKS - PHASE 2) 7/20/22
TR
9590
B
B
B
B
B
B
1.012Ac
1.194Ac
1.047Ac
PURPOSES ONLY. NO LIABILITY IS ASSUMED
FOR THE ACCURACY OF THE INFORMATION
NOTE: THIS MAP WAS PREPARED FOR ASSESSMENT
DELINEATED HEREON. ASSESSOR'S PARCELS
OR BUILDING SITE ORDINANCES.
MAY NOT COMPLY WITH LOCAL LOT SPLIT
1"=50'
16
FM. PG. 1 7-2-23
ASSESSOR'S MAP
CONTRA COSTA COUNTY,CALIF.
BOOK PAGE172 34
POR TR 95592023 ROLL-M.B. 552-35 (OAK GROVE TOWNHOME)
JONES RD
OAK CIR
01
CONDO PLANS: 23029/672-77 3/30/23
47.34
113.03
N14°40'E
143.93
N35°10'28"W
94.33
R=270
165.06
55
60
20
40.02
R=330
137.28
OAK
140.48
N82°6'39"W
RD
103.98
90.36
90.07
R=499.5R=520.5
23.18
36.93
S8°46'44"W
S8°46'44"W
N0°18'15"E
146.05
144.5
32.53
44.11
45.962155.92
83.16
91.61
N32°54'55"E
22.63
27.6
21.06
65.78
37.57
63.13
34.16
20.43
35
15
1
2
14
13
C
E
F
D
02
03
04
05
06
07
08
09
24
17
18
19
20
21
22
23
47
48
49
50
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
PRIVATE STREET PARCEL)
(SEE APN 172-010-064
01
11,263SF
10
14,582SF
8,834SF 19
9,553SF
26
32
8,534SF
36
7,695SF
18
17
16
15
14
13
12
11
25
24
23
22
21
20
27
28
29
30
31
35
37
34
33
38
39
40
340
N23°2'36"E
N89°41'45"W
136.78
N81°13'16"W
R=186.5
50.19
N84°41'12"W
15.05
N84°41'12"W
24.04
R=14.5
N32°54'55"E
28.21R=14.5 R=513.5
21.5
N5°18'48"E
N0°18'15"E
133.85
N0°18'15"E
N0°18'15"E
144.5
148.88
21.51
R=14.5
32.56
R=263.5
4.81
S8°46'44"W
68.37
57.84
167.65
R=14.5
R=14.5
25.55
4.56
19.24
R=35.5
R=14.5
7.86
11.31
3.19
R=14.5
19.71
01
PURPOSES ONLY. NO LIABILITY IS ASSUMED
FOR THE ACCURACY OF THE INFORMATION
NOTE: THIS MAP WAS PREPARED FOR ASSESSMENT
DELINEATED HEREON. ASSESSOR'S PARCELS
OR BUILDING SITE ORDINANCES.
MAY NOT COMPLY WITH LOCAL LOT SPLIT
3
1"=50'
4
11
12
18
17
19
FM. PG. 1 7-2-23
ASSESSOR'S MAP
CONTRA COSTA COUNTY,CALIF.
BOOK PAGE172 35
POR TR 95592023 ROLL-M.B. 552-35 (OAK GROVE TOWNHOME)
JONES RD
OAK CIR
OAK CIR
OAK RD
OAK CIR
OAK CIR
36
01
N8°46'44"E
315.63(T)
N88°52'21"W
CONDO PLAN: 23005/084-331 1/19/23
CONDO PLANS: 23003/326-331 1/12/23
1
2
3
4
5
6
7
8
01
02
03
04
05
06
07
08
10
11
12
13
14
15
16
17
9
10
11
12
13
14
15
16
97
98
99
100
101
102
117118119120121122123124125
103 104 105 106
107 108
109 110 111
112
113
114
115
116
51
52
53
54
55
56
24
09
18
23
22
21
20
19
25
48
47
46
45
44
43
58
495051525354555657
26
27
32
31 33 34 35
30
29
28
4140393837
36
42
PRIVATE STREET PARCEL)
(SEE APN 172-010-064
8,675SF
9,478SF
9,870SF
9,924SF
12,607SF
.484Ac
7,389SF
337.79
N88°52'21"W
105.33
114.69
39.94
R=2970
164.52
32.62
N0°12'1"E
R=14.5
17.88
10.1317.65R=14.5
N89°47'59"W
31.2412.77
R=39.5
10.71
27.67
R=14.5
N20°28'7"E
118.7
N23°2'36"E
93.72
57.8
62.63
N67°43'15"W
N88°52'21"W
50.18
17.61
35.6
17.98
19.3
17.25R=14.5
N20°28'7"E
51.64
R=499.5
21.8
N22°58'8"E
68.89 59.29
N5°18'48"E
63.13
W
N65°49'10"
N21°47'36"E
45.06
44.76
41.01
N21°50'1"E
2.17
N84°41'12"W
N84°41'12"W
208.81
175.14
227.66
33.54
R=236.5
14.34
N8°46'21"E
82.74
59.25
141.99
41.76
32.53
N81°13'16"W
R=36.5
R=14.5
15.33
18.74
N8°46'21"E
134.2
57.83N81°13'16"W
151.54
N8°46'44"E
20.84R-14.5
R=213.5
23.34
N8°46'21"E
110.94
23.18R-14.5
350
PURPOSES ONLY. NO LIABILITY IS ASSUMED
FOR THE ACCURACY OF THE INFORMATION
NOTE: THIS MAP WAS PREPARED FOR ASSESSMENT
DELINEATED HEREON. ASSESSOR'S PARCELS
OR BUILDING SITE ORDINANCES.
MAY NOT COMPLY WITH LOCAL LOT SPLIT
1"=50'
10
FM. PG. 1 7-2-23
ASSESSOR'S MAP
CONTRA COSTA COUNTY,CALIF.
BOOK PAGE172 36
POR TR 95592023 ROLL-M.B. 552-35 (OAK GROVE TOWNHOME)
JONES RD
OAK CIR
OAK RD
OAK CIR
OAK CIR
26
01
N8°46'44"E
315.63(T)
N88°52'21"W
CONDO PLAN: 23005/084-331 1/19/23
CONDO PLANS: 23003/326-331 1/12/23
35
9 8
7
5
11,086SF
PRIVATE STREET PARCEL)
(SEE APN 172-010-064
38
89
90
91
92
93
94
95
96
46
45
44
43
42
41
40
39
83
84
85
86
87
88
31 9,624SF
24 8,988SF
77
78
79
80
81
82
37
36
35
34
33
32 30
29
28
27
26
25
71
72
73
74
75
76 23
22
21
18
19
20
10,282SF
17
9,539SF09
64
65
66
67
68
69
70
10
11
12
13
14
15
16
9,539SF01
57
58
59
60
61
62
63 08
07
06
05
04
03
02
360
N81°13'16"W
57.83
N88°52'21"W
68.5 36.48 24.71R=14.5
6R=14.5
22.78
N8°46'44"E
143.79
N3°42'35"E
137.58
21.5
17.74
144.44
N1°7'39"E
N88°52'21"W 58.3521.1955.6559.06
426.03
2156.8360.832172.12
N4°50'49"E
109.72
9.36
N0°12'1"E
32.62
N1°7'39"E
N1°7'39"E
N1°7'39"E
N1°7'39"E
N88°52'21"W
44.15 46.33 42.3322.78
R=14.5
17.88R=14.5
10.13 22.78
R=14.5
144.44
144.44
158.94
R=14.5
22.78
144.44
N8°46'44"E
173.66
181.43
ASSESSOR'S MAP
CONTRA COSTA COUNTY,CALIF.
BOOK PAGE180 13
17
12
12
12 37
15
131
131
11
182
09
182
08
182
NORRIS ADD'N TO WALNUT HEIGHTS
TRACT 2621
TRACT 3121
A-
B-
C-
M.B. 7-174
(POLLY ACRES) M.B. 70-13
M.B.93-46
HU
N
TING
TO
N
W
AY
VALLECITO LANE
MOU
N
TAIN
VIEW
MYNA
H
NATO
M
A
PALMER
GREEN
OAKS
A
A C
A
A
C
C A A B
B
B
A
CC
A
C
B
36
05
06
07
14
15
02
10
16 12
13
17
03
21
22
23
24
2526
27
28
2930
31
34
35
1
2
3
4
5
6
7 8 9
1
2
3
4
5
6
7
8
9
19
18
.95Ac.
.69Ac.
.33Ac.
.33Ac.
.355Ac.
.355Ac.
N57°36'04"W
N58°33'W
25'
10
0.95
155.0
10
0
20
0
.0
359.82
179.82
198
.33
10.4N57°36'04"W
N12°41'50"W
N28
°57
'10
"E
10
4
.77
S57°57'04"E
N32
°02'56
"E
10
0
155
10
0
155 102.89
125.21
25
20
1
.10
(R)
70
.25
R=150
185.3566.88
132.68
48
.22
72
.11
76.36
120
78
.98
125125.21
119.50
119
.50
269.75
N31°06'E
S32°02
'56
"W
N57°57'04"W
N32
°02'56
"E N32
°02
'56
"E
N32°02
'56"E
10
0
.25
31.4231.42R=20 R=20
30'
25
'
50'
105105.21
438.07
100
31.42R=20
96
120
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10
0.25
78.20
225.0 92.96 35
21
1
.45
443.51
443
.35
18
0
18.24
(R)
84.14
R=42
45
.01
17.5
R=28
R=28
25.11
32.99 61.84
147.41
R=100
113.35
N20°50'40"W
N57°51'04"W
N88°09'46"W
N58°48'W
156.11
OLD LOT COR.
N32°02'56
"E
N32°02
'56
"E
N34°32'30"W
N70°31'04"W
61.99
45
N57°57'04"W
N58°54'W
20079
150
150
20
0
15
0
77
100
116
N32°02'56"E
N31
°06
'E
N31°06
'E
N57°57'04"W
N57°57'04"W
N57°57'04"W
7.14 25
150
25
S58°54'E
92.96 25 30
400.0
100
N57°57'04"W
100 41.72 37.42
R=40
120.97
25
'
200
100
15
0
15
0
183
.17
138
.54
225
.01
50
'
31.42
R=20
122
.67
27.67
S24°13'W
S33
°48'40"W
N32°02
'56
"E
N68°26'56"E
N68
°46
'E215
.47
70
.48
R=20
31.42
101.60
25.33
9.66
R=20
86.47
N21°33'04"W
33.17
143
.67 81.32
159.98
N68°26'56
"E
N29°16'21"W
N48°08'27"W
103.81
172.41
123.18
80
147
.64
67.64
N72°08
'E
S63°56'45
"W
396.91
N31
°30
'11"E
81
.22
50.08
165.10
400.0
(R)
140.19106
N57°52'04"W
N5°57
'40
"E
N12
°44
'E
40
'59.79
R=42 45
.81
17.45
N58°27'04"W
N61°29
'37
"E
19.39R=20 58.97
OLD LOT COR.
3-31-77 E. F. H.
1"=100'
Sanborn Date : 26/03/1999
.425Ac
181.32
83.23
163.39
S68
°26
'56
"W
N58°27'4"W
(N59°26'45"W)
7/25/17
PURPOSES ONLY. NO LIABILITY IS ASSUMED
FOR THE ACCURACY OF THE INFORMATION
NOTE: THIS MAP WAS PREPARED FOR ASSESSMENT
DELINEATED HEREON. ASSESSOR'S PARCELS
OR BUILDING SITE ORDINANCES.
MAY NOT COMPLY WITH LOCAL LOT SPLIT
A
192.99
188.61
DEV AREA
RESTRICTED
PAE
358.44
1-212PM7 1-5-17
1
1
1
1
97
.10
N31
°58'3"E
18.78
"B""A"
BLVD
37
.423Ac
36,37
CT
PARR
O
T
CT
C
T
RD
CT
ASSESSOR'S MAP
CONTRA COSTA COUNTY,CALIF.
BOOK PAGE184 10
GOODMAN TRACT
09
11
19
21
08
100
OL
Y
M
P
I
C
STA
T
E
52
30
28
R=
1
3
5
8
27.30
136.30
S77^51'
W
N3
7
^
0
3
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2
2
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E
17
4
.
5
3
12
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3
0
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3
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22
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8
3
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2
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9
2
62
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9
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^
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7
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4
5
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W
80
.
1
6
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29.68 S76^54
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0
8
"
E
136.23
72.
7
4
S63^
0
3
'
5
2
"
E
31
1"=100'
CODE LI
N
E
PURPOSES ONLY. NO LIABILITY IS ASSUMED
FOR THE ACCURACY OF THE INFORMATION
NOTE: THIS MAP WAS PREPARED FOR ASSESSMENT
DELINEATED HEREON. ASSESSOR'S PARCELS
MAY NOT COMPLY WITH LOCAL LOT SPLIT
OR BUILDING SITE ORDINANCES.
100
30
5
.
0
1
1
2
3
4
5
6
7 8
9
10
11
12
13
14
15
16
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^
4
1
'
3
6
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W
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^
2
3
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2
3
"
W
105
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7
7
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13
4
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7
4
29
.
2
4
87.7
9
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5
5
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R=56.50
38.4
1
38
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2
40.
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3
117
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4
7
101.76
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92
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182
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9
6
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1
18.9
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4
8
26
.
7
0
34
35
36
49
48
47
46
44
43
42
4140
39
38
37
6,217SF
4,343SF
6,971SF
7,578SF
5,083SF
7,514SF
8,061SF
8,090SF
6,787SF
7,864SF
7,187SF
11,496SF
13,993SF
13,573SF
7,349SF
9,129SF
57.
3
1
39
.
3
0
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4
1
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1
7
4
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9
6
51.56
37.69
67.8
2
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2
9
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5
14
1
.
1
6
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0
5
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5
8
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14
6
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7
9
169
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4
1
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TRACT 8939
40
71 .5724.3
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21.43 19.96
29.5
0
30.6
6
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FM 20-38, 49-10 12/16/63
PAU
L
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O
N
L
N
A
A UMT
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I
L
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N
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8
^
2
3
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3
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A
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26.7
0
18
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5
9
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8
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5
7
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1
4
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15
3
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17
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3
9
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183
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3
5
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3
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22
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3
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W
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22
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5
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162
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9
1
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3
6
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4
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86.3
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3
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7
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3
6
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7
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5
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0
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1.07
6.26
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32.50
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2
6
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6
9
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4
5
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51
45
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MOST ELY COR
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50
51
53
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"B"
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59.6
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67.9
2
35.6
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1
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2
5
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1
5
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23
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9
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3
7
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3
6
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4
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6
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21.98
34
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0
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24.1
2
79
.
1
3
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7
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4
5
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5
4
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14.8
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4
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.
9
7
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202
12/15/08
MB 506-1 10/19/2007
6/16/2008202PM46
MB 16-354 7/1/1918
A-
N71^1
7
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1
9
"
E
50.51
40.
7
9
10
1
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6
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2
9
R=40
34.96 45.4
8
R=30
0
N64^
1
0
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9
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W
5.91
44.8
9
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8
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0
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6
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78
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77
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23
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2
8
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8
32
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2
6
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0
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1
3
5
8
R=
1
6
5
1
.
4
9
31
8
.
0
2
.94Ac
ASSESSOR'S MAP
CONTRA COSTA COUNTY,CALIF.
BOOK PAGE184 45
FLORALAND TRACT
BOU
L
E
V
A
R
D
WA
Y
BOULEVARD WAY
KIN
N
E
Y
WA
R
R
E
N
185
P.B.
13
15
1-31-64
25
24
20 21
2223
11
36
38
10
08
09
25
31
26
344.76
N.D.
S1^34'42"W
18.95
72
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4
6
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8
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2
5
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8
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58
.
9
4
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16
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2
3
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9
177.93'
N1^33'W
23
4
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8
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10
6
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2
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10
6
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3
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8
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128.62'
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11
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2
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73
.
4
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9
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5
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119.37'
S1^33'E
169.47'
184.53'
100'84.53'
80
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73
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4
7
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10
3
.
7
1
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75
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11
3
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=
1
0
0
'
PURPOSES ONLY. NO LIABILITY IS ASSUMED
FOR THE ACCURACY OF THE INFORMATION
NOTE: THIS MAP WAS PREPARED FOR ASSESSMENT
DELINEATED HEREON. ASSESSOR'S PARCELS
MAY NOT COMPLY WITH LOCAL LOT SPLIT
OR BUILDING SITE ORDINANCES.
WHITE HORSE
N0^0'40"E
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8
^
2
4
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8
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140
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4
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12
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135.56
164.83
81
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4
13
0
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5
117.24N0^11'20"E
"A"
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41
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9
5
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450
9/20/12
FM 49-20,21
207
PM26
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1.513Ac
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30 20.44Ac
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30.62
30.62
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2
5
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8
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9
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N0^11'20"E
49.31
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8
^
4
3
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2
4
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E
133.21'S0^5'48"E
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0
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8
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T
S
T
SARANAP AVE
DR
RD
39
40
CODE LINE
CODE LINE
221.24
327.99
.718Ac
1.49Ac
.919Ac
590
PURPOSES ONLY. NO LIABILITY IS ASSUMED
FOR THE ACCURACY OF THE INFORMATION
NOTE: THIS MAP WAS PREPARED FOR ASSESSMENT
DELINEATED HEREON. ASSESSOR'S PARCELS
OR BUILDING SITE ORDINANCES.
MAY NOT COMPLY WITH LOCAL LOT SPLIT
39.03
.610Ac
"B"
"C"
"A"
.298Ac
.301Ac
BLVD
WESTBOROUGH LN
N30°20'38"E
185.01'
26.5
52'
43.5
18
14.5
90'
40.55
39.5
18
142.34
43.58
14.5
72.25
18.14
12
8.91
13.93
17.5
21'
239.67'
N59°39'22"E
46.97
39.8
7.92
48.77
14.5
17.5
30.63
30.63
R=19.5
R=19.5
118.55
N59°39'22"E
N59°39'22"E
01
02
03
04
05
06
07
08
09
10
11
12
13
14
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
250
TICE
VALLEY
31
189
P.B.
2018 ROLL-TRACT 9376 M.B. 528-1 (WESTBOROUGH)
FM. PG. 31 06-16-17
ASSESSOR'S MAP
CONTRA COSTA COUNTY,CALIF.
BOOK PAGE184 59
1"=50'
N59°39'22"E
R=558.04
21.41
22.75
N18°51'38"W
N18°51'38"W
N30°20'38"E
14.5
14.5
R=90.5
N59°39'22"E
N59°39'22"E
7/6/16518 CONDO PLAN 16132/
ASSESSOR'S MAP
CONTRA COSTA COUNTY,CALIF.
BOOK PAGE185 22
80-46
189
P B
238
P B
220
23
24
25
21
SUN VALLEY ORCHARDS A M B 31-6
RANCHO SAN RAMON
1 -RECORD OF SURVEY
7PM182-1969-
FREEMAN
ROAD
SACRAMENTO
OLYMPIC BLVD
NEWELL AVE
NORTHERN
220
101112
13
14
15
16
17
18
19
20
21
27 28 29
30
31
08
07
01
02
03 04
05
06
1 2 3 4 5 6
7
8
9101112131415
16
FREEMAN
COURT
A
B C
A
B
A
1
1
A
22
2
2
A
111.63
S67°19'35"W
81.70
228.01
34.68
187.04
N5°29'20"W
N10°57'W
N24°03'50"E
159.48
294.13 333.93
310.29
150.81
67.01
S4°44'E
S65°44'E
.87
106.13
S83°45'E34.86
45.85
80.70 85.42N46°22'E
248.59
66.50
R=325
R=275
56.27 20
20
120
120
S79°03'W
66.29
N14°40'20"W
N79°03'E
120
215
120 103
215 97
S10°57'W
120
539.41
39.41 24.89
R=40
47.43
R=40
N10°57'W
645.62
134.62 48
114.89
243.85
73
N79°03'E
128.06
N21°19'25"E
243.38
442.57
200N79°03'E
40.30
20' RD R/W
R=40
24.89
39.41
208.70
147.42
N10°57'W
94.14
101.70
N64°19'E
N57°28'30"E42.21
N20°30'40"W
104.40
21.80
73.29
23.14
79.01
N10°57'W
N69°36'55"E
N47°46'E
96.43
S20°23'E
133.00
38.42 47.78
86.20N82°27'30"E
1
1
To COUNTY
3647 OR 3
6-24-60
TOTAL 5.37Ac.
82.0924.35
20
81.44
N85°02'E
N4°27'30"W
N4°39'W
90.16
101.86
102.50
25
73.01
40
N3°30'19"E
S3°20'W
142.25
N81°35'35"E
36.66
19.62 19.82
N85°54'55"E62.58
82.68
7.81
S89°23'35"E
28.43
90
110
159
87 +-
R=1402.468
28.96
50.22
79.18
S65°39'30"E
N0°54'37"E
118.31
S70°20'35"E
36.66
30
30
50
2.85S79°29'50"W58.59
31.75
50.94
S87°49'10"E
125.8
166
S3°20'W
S17°49'50"W
122.75
164.17
165.18
S30°E
10.77
36.07
R=25
62.32 45.89S72°11'05"E 56.61S84°01'35"E
183.98
139.77
N10°57'W
194.02
207.04
217.88
120 175.45
1"=100' 107
.58
48 L.S.M. 50 7-24-67
Sanborn Date : 31/05/1999
PURPOSES ONLY. NO LIABILITY IS ASSUMED
FOR THE ACCURACY OF THE INFORMATION
NOTE: THIS MAP WAS PREPARED FOR ASSESSMENT
DELINEATED HEREON. ASSESSOR'S PARCELS
OR BUILDING SITE ORDINANCES.
MAY NOT COMPLY WITH LOCAL LOT SPLIT
.23Ac
.59Ac
.30Ac
.56Ac
.23Ac
.08Ac
.28Ac
12
3
4
5
"A"
"B"
3233
34
35
36
37 38
39
61.11
S58°41'09"W
73.92
R=1402.69154.34
5,576SF
4,577SF
4,186SF
3,193SF
6,050SF
6
10,692Ac
148.41
R=1402.69
6,462SF
B-9547 553-17
1-30-69
B
B
B
B
48.27
53.43
26.9
176.7
50.63
41.5
41
N53°23'20"E
69.94
41.32
14.94 35.85
84.18
80.44
75.32
77.8
105.16
32.63
72.58
72.83
47.82
39.29
1/11/23
TR
9547
24.74
ASSESSOR'S MAP
CONTRA COSTA COUNTY,CALIF.
BOOK PAGE187 18
RANCHO SAN RAMON
N. SEC. 12 T.1S., R.2W., M.D.B.&M.
TRACT 6859
133 P.M. 17
159 P.M.38
1-
A-1988 ROLL-
2-
3-
M.B. 316-30
5-11-88
9-18-92
RECORD OF SURVEY 34 L.S.M.45 6-2-65
RD.
WILSON
SEC. 12
RAN
CHO
SAN
RAMON
LIVORNA
180
192
P.B.
32
19
33
08 22
29
30
23
25
24
06
26
27
28
03
04
19
32
16
20
.50Ac.
.67Ac.
.54Ac.
.486Ac.(T)
.560Ac.
.537Ac.
"A"
"B"
.476Ac.
.84Ac.
"C"
.48Ac.
.57Ac.
0.51Ac.
"A"
"B"0.49Ac.
.62Ac.
.60Ac.
.63Ac.
1
2
3
4
5
10'PVT.ST'RM
DRAIN ESMT.
145'
15
0'
N2°26'18"W
145.00
25
.00
15
0
'
N89
°43
'18
"W
24
0
.00
N89
°43
'18
"W
166.05
N37°13'24"W
10
0.00
N04°33'14"E
131.00
10
0.00
N89°43'18
"W
10.00
N23°05'41"W
47.00
230.00
N5°04'58"E 261.08
149
.61
139.61
N66
°53
'35
"E
31.08
N81
°45
'48
"W
40
'
80.80
25'
R=220
'
112.47
193
.27
25'RDWY. & UTIL. EASE.
67.74'
87.42'
R=140'
(.098Ac.)EASE.
78.19'
86.34'
R=97'
28
.03
S12°30'E
135'
49.31'
85.43R=163
72.33'R=138'
25
124.61
R=81.81
125'
N2°26'18"W 264.58
114.58 45.75
145
'
N87°33'42"E
N0°40'42"E S0°09'E
85'22'
20.46'
19.00
S12°14'E
246.97'
222.28
40
'
22
.37 54.79'
S6°25'E
105.73'
26.46 209.94'
86.29
25'25'
194
.76
'
R=458231.70
37.43
25.25
173.96
N28°20'W S69
°40'W
284.27'
154
.83
.16Ac.
37.13
R=16.31
50'
79.76'S36°27'30"W
164.72
R=155
194.51'
R=130'
R=106.81'
162.69'
22.99
116
.11
S74°15
'50
"W
N7°34'W
164.47'
85
.29
N82
°01
'45
"W
25'S77
°17'50
"E
S1°06'55"E
160.3'
111.00
167
.99'
50.63
N10°06'49"W
25
.24
88.58
N87
°58
'38
"E
146.00
N14°23'34"E148.29N22°28'46"E
83
.14
N88°28'42"E
15
8
.96
27
2
.78
28
8
.16
20
5
.02
187.99
N22°45'37"E
75.00 N75
°36
'26
"W
17
0
.14
23
6
.78'
406.54
(T)
25
7
.28
'
45
.00
N87
°58
'38
"E
35
'22.50
S2°26'18"E
20
3
.07
N88
°28
'42
"E
LAVEROCK
3 3
3
3
3
A
A
2
A 2
2
1
1
1
.17Ac.
10-27-64
1"=100'
2
15' POLE LINE
25' PRIV. ACCESS & UTIL. EASE.
PURPOSES ONLY. NO LIABILITY IS ASSUMED
FOR THE ACCURACY OF THE INFORMATION
NOTE: THIS MAP WAS PREPARED FOR ASSESSMENT
DELINEATED HEREON. ASSESSOR'S PARCELS
OR BUILDING SITE ORDINANCES.
MAY NOT COMPLY WITH LOCAL LOT SPLIT
31
"A"
"B"
"A"
"B"
86.34'
N05°34'34"W
86.64
15
5
.74
N72
°39
'0"E
16
8
.81
87
10'
.472Ac.
.675Ac.
P.A. & U.E.
4-210 P.M.38 2-16-16
4 4
4
4
RD
LN
151.78
8/2/16
210
180 PM38
ASSESSOR'S MAP
CONTRA COSTA COUNTY,CALIF.
BOOK PAGE187 23
14 14
14 14
2 2
6
6 1 1
12
14
114
1414
1414
47
7 4 4
4
3
3 3
33
39
9129111211
12 912
138138
8
1010
8
10
13
11
1310
13
11
20
'
20
'278'
285.94'
151.5'126.50'
15
8
.
9
6
15
8
.
9
6
14
0
.
9
6
EA
S
T
14
0
.
9
6
151.50'
126.5 39
9
.
4
6
N01^00'E
CO
U
R
T
"A""B"18 31
EA
S
T
14
0
.
1
0
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14
0
.
0
149.35
151.50'
18'
10
278.0
S01^00'W
S01^00'W
S8
8
^
2
7
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4
3
"
E
12
2
.
1
0
SA
M
A
N
T
H
A
"B"
"B"
"A"
26
29
32
C 10' SEWER R/WL
"A""B"
"B"14
2
.
7
7
14
0
.
1
7
149.33 128.63
48
'
14
7
.
9
2
EA
S
T
27 28
AP
P
A
L
U
S
A
N32
^
3
2
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1
0
"
W
N1^33'32"E
11
0
.
7
0
25 211.92
236.92
11
2
.
1
0
17
5
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187.67
23
30 "D"
226
.
5
6
WE
S
T
10
0
.
0
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40.0
187.67'
302.78
222.76'
N2^32'27"E LIVORNA
.49Ac.
11
0
.
7
0
11
0
.
7
0
25
25
211.92
211.92
11
0
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7
0
11
0
.
7
0
11
2
.
1
0
236.92
19
8
.
7
4
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108.48'
S1^W
24
3
'
24
3
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26
9
.
2
4
NORTH
N8
8
^
2
7
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5
6
"
W
"A"
"B"
"C"
20
21
22
232
211.96
10
6
.
5
7
10
125
N1^E
108.48'
125
20
202020
20
100
(.04)
HEIGHTS
108.48'
100
(.04)
20
10
NORTH
12
33
EA
S
T
22
7
.
7
1
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14
9
.
1
'
128'
N8
9
^
1
3
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W
S0^09'W 72.62'17
.
0
5
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113.24
S5^31'E
S5^31'E
452'
567.6
R=
5
4
2
10
8
.
6
1
27'
25'
11
1
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25'
11
2
.
5
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44 40'
84'
LI
V
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N
A
SW
C
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1
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C
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7
27'
34
1415
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115.3
9
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5
8
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119.99
43
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4
3
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6
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10
5
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6
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315.93
118.54
135'
N8
8
^
2
8
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5
3
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W
N8
8
^
2
8
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5
3
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W
S8
7
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3
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E
N2^01'07"E
S0^30'W
13
"C""B"
"A"
20
5
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6
0
12
0
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191.19
245
185.90
10
4
.
1
1
N.D.
10
3
.
5
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N8
9
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W
N1^E
S8
9
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S2^37'07"W
S8
4
^
3
4
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0
2
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E
06
85
20
20.02 10
39.98
259.34'
245'
20
'
20
'
R=120
67.02
12
0
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8
^
2
8
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5
3
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E
N2^31'07"E
21
0
23
4
.
7
55
38.
7
2
80.7
1
10
4
.
3
9
82.11
R=180
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8
^
2
8
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5
3
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W
N2^31'7"E N26
^
2
0
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W
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4
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1
1
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E
32.11
N2^31'7"E36
4
.
3
5
39
1
.
1
9
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"A"
"B"
32
33
25'
242.78
214.55
89
.
5
9
12
0
.
2
8
N1^31'07"E
N1^31'07"E
N8
4
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4
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0
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W
27 "C"
SL
O
P
E
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A
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E
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20
1
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7
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20
7
.
7
1
20'
11
127.53
100
110.14120
20
227.5'
241.87'
N2^31'07"E
WE
S
T
N1^E
100
21
0
36
0
.
3
8
15
2
.
6
0
"A"
34 16
100
"B"
99.99
NORTH
100120115
18
0
.
7
0
15
6
.
8
9
15
7
.
0
5
WE
S
T
17
8
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6
9
15
5
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7
0
EA
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T
125
110.02 26
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7
4
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25
99
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2
6
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S
T
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8
6
S6
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109.83
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231
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EA
S
T
17
4
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2
6
17
4
.
2
6
WE
S
T
20
0
20
0
20
0
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10
28 14
A
A
B
"C"
"A""B"
N01^32'10"E
101.39 100.68
N8
8
^
2
3
'
W
N8
8
^
2
1
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3
1
"
W
34
8
.
4
8
25
0
.
3
5
61.67
171.60
N2^30'33"E
29 30
23
12
36.0
1
67.6
5
'
32
.
9
2
35
.
0
0
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WE
S
T
40.01'
17
.
8
5
30.95
S30^
WN30
^
0
0
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E
S7
6
^
5
7
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E
N.
D
.
EA
S
T
29
30
24
45
25
7-19-79
232
TRACT 4982
8-23-78
MB 216-29
6-
44LSM30
7-
8-
9-13-
14-
12-
11-
1"
=
1
0
0
'
1
6
7
12
231
PURPOSES ONLY. NO LIABILITY IS ASSUMED
FOR THE ACCURACY OF THE INFORMATION
NOTE: THIS MAP WAS PREPARED FOR ASSESSMENT
DELINEATED HEREON. ASSESSOR'S PARCELS
MAY NOT COMPLY WITH LOCAL LOT SPLIT
OR BUILDING SITE ORDINANCES.
35
19
2
.
1
0
18
9
.
8
8
127.51
N01^31'07"E
16
5
.
5
0
16
5
.
5
0
S8
5
^
2
5
'
E
15-205PM48
15 15
1515
127.51
PSD
E
A
S
E
5'
SEC 6 & 7 T1S R1W MDB&M
39LSM28 1/9/1966
5PM42
12/12/1968
10/1/1968
3PM22
6PM27 59PM3
48PM43
32PM10
10/28/1977
1/25/1974
10/1/1976
83PM37
115PM3410-
1/8/1980
4/30/1985
ND
2-
3-
4-
4/22/1968
5PM21 9/11/1968
18PM2 8/25/1971
8/25/19
12/23/2010
205
PM48
1/31/11
39.98
N7^00'W
.565Ac
.673Ac .779Ac
.475Ac
.87Ac .83Ac
4.23AC
.484Ac
1.15Ac
.62Ac
.48Ac.559Ac
.442Ac
N2^31'07"E
RD
20
'
A
C
C
E
S
S
E
A
S
E
N8
8
^
2
8
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5
3
"
W
N8
8
^
2
8
'
5
3
"
W
RD
.48Ac
.48Ac .469Ac
.49Ac
.462Ac
.602Ac
.602Ac
.587Ac
.48Ac
1.198Ac
.48Ac
1.44Ac
.609Ac
.60Ac
.55Ac
.571Ac
1.35Ac
1.01Ac
.66Ac
.455Ac
DR
192
PB
14
0
.
1
0
ASSESSOR'S MAP
CONTRA COSTA COUNTY,CALIF.
BOOK PAGE188 23
48-11
24
2122
4344
232
231
232
183
P B
184
P B
WALNUT CREEK PARK
1-
2-
3-
4
44
3
1
1
3
3
3
2
2
2
SOUTH
MAIN ST
RO
A
D
CREEKSIDE DR.
CR
EST
CREST
JOURNEYS
END
13
14
15 12
02
17
05
06
27 19 18
13
12
11
30 03
02
04050623
28
29
3738
35
36
20
22
09
10
11
"D"
"C"
"B""A"
"B"
"A"
"C"
28
27
26
"A"
"D"
"C"
"B"
29
"D"
"C"
"B"
25
"A"
16
TRACT 3320
7-24-68
TRACT 3096
43
5
.1
485.7
N65
°48
'E
N14°44'W
497.6
138
N75°16'E
117.81R=75
20
20
216.12
155
16
2
85
97
16
2
16
2
S75
°16
'W
S75
°16
'W
N75°16'E
16
3
.98
124.76
N14°44'W
20.24
114.16
134.78
S14°44'W
103.38
216.12
93.12
S14°44'E
7
75
S72
°16
'W
75.90
76
(.04
Ac.)
(.04Ac.)
(.02Ac.)
92
.64
209
.94
R=36
5
R=38
5
81.20
32.62
14
2
.85
67
.35
S7°42'W48.58
S14°42'E 101.95
S10°45'27"E
65.63
85
N17°53'W
34.87
40.69
67.91
112.12
S18°21'E
179.94
16
.5
22.10
13
6.72
S14°44'E 215.6
97
99.36
167.89
N66
°20'E
N66
°20'E
47
9.99
10.86
S75
°59
'30"W
114
.37
N26
°11'30
"W
16
.15
507.57
86.51
N10°53'W
18
7
.36
S80
°55
'W
20
71.01
N42°59'W
229.9 65.55
S19°0'30"E
133.05
144
.3
30
40.44
31.48
N76
°45
'30
"E
S76
°45
'30
"W
130.91169.80
S39°09'30"W
N85°54'33"W
S84
°07
'06
"E
100 75
N10°11'30"W
229
.23
119
.69
15
0
'
40.68
130
.34
20
20
10'
172.38
182.48
70.2
116
.80R=73
15.56
50
50
R=260
'
20
'71.38
30
59
.84
5
N78
°22
'11"W
N13°43'24"W
52.54
N15°46'35"W 22.92
N18°29'34"W 68.21
N17°29'31"W
13.37 25.6519
S49°03'E
S74°14
'20
"W
12
3
.98
12
3
.7
193.05
198.92
S40°49'30"E
S39°28'34"E
13
2
.84
N67
°16
'20"E
83'
N12°21'41"W
81.80
58.82
N40°57'W
14.53 N40°57'E
115
S34°06'24"E
144.17
115
135.51
R=749.2 153.4
N41°58'04"E
201
.75
S73°35'W
20
4
.19
N74
°55
'36"E
S56°03'34"E
99.64
19
1.19
21
8
.11
S73
°35'W
N18°00'30"W
37.60
N31°11'46"E
120.77 68.7N22°31'28"W
44.8622.98
S8°49'52"E
S12°03'21"E
19.54
34
.49
N79°10'49"E
22.12
50
50
N23°55'W
To STATE
45796
8-14-57To STATE
3768
R=716.20
58.48
46
.20
88.98
R=1220
10.18 74.78
85.16
116.34
N8°49'52"W
To STATE
2-5-57
7124
R=10
14.23
R=1220 119.19137.67
R=683.25
84.55
64
.71
10
93
.47
18.19
1-21-67
263
.23
N75
°16
'E
36
9
.7
13
7
.77
N82
°45
'16
"E
115
.30
30
R=736.35
107.85
204.45206.4
R=1220.09
R=1017.81
28
.70.10Ac.
5-22-57
To STATE
29461
4380
8
.02Ac.
8-5-57
N23°45'E155
120N34°30'W
53.69
104.21100'
TO STATE
29461
5-22-57
.10AC.
N79
°22
'E
102.49'
N09°19'19"W
10
0
'
10
0
'
10
0
.01
'
80.96'
100.96'
30
N80
°40
'41
"E
N80°40
'41
"E
10
0
.07
100'
102.49'
ARBOL
GRDE.
N80
°40
'41
"E
12
9
.69
'
17
2
.78
'
19
3
.96
N81
°13
'41
"E
83'
104.34'
N40°40'27"W
49
.99
R=10'18.24'
68
.17
120
N42°15'19"W
75.31'
9.66
17.83
R=1170'
N35°22'12"W
S35°55'30"E
195
.9'
N65
°44
'W
S33°51'W
119.04
142.35
130
12
.80 S76
°24
'40"W
18
2.23
264.07S35°20'E
25' R/W
17
.01
N.D.
N5°39'28"W
To STATE
1"=100' PURPOSES ONLY. NO LIABILITY IS ASSUMED
FOR THE ACCURACY OF THE INFORMATION
NOTE: THIS MAP WAS PREPARED FOR ASSESSMENT
DELINEATED HEREON. ASSESSOR'S PARCELS
OR BUILDING SITE ORDINANCES.
MAY NOT COMPLY WITH LOCAL LOT SPLIT
S12°3'21"E
18
"A"
"B"
.88Ac
.552Ac
93.30
111.23
N81
°0'26
"W
51.84
N81°0'26
"W
30
.0
N34°18'24"W
104.42
104
.74
N54
°53
'17"E
5
5
5
5
5
5
4-
5-
N35°17'6"W
57.85
R=75
62
.81
N8°59'34"E
S8°9'W
83
.18
8.03
175
.51
20
5
.35
N54
°51'2"E
N9°19'19"W
N35°49'52'W
192.38
MB 4-84 2/7/1911
C
ASTL
E
HILL
231
47PM1 7/20/1976
8/27/1976
49PM19
81PM34
205PM33 8/20/1010
10/1/1979
10/20/1976
47PM31
.06Ac
.026Ac
.65Ac
.46Ac
.55Ac
.44Ac .34Ac
.49Ac
.62Ac
.22Ac
.26Ac
.28Ac
.23Ac.26Ac
MB 122-5
5.198Ac WOP
.77Ac
.66Ac
.47Ac
.84Ac
176
.0
N34°18'10"E
53.32
N7°26'20"W
N79
°29
'20
"WSTA "A"
MB 92-47
8.80Ac
5-17-63
(SPRR)
.48Ac
.47Ac
.24Ac
.46Ac
.18Ac
.713Ac
.416Ac
.741Ac
.31Ac
.37Ac
.31Ac
.30Ac
.61Ac
.715Ac
.30Ac
.484Ac
AVE
212
PM31
DAN
V
ILLE BLVD
AV
E
DRIVEWAY
EASE
R=71.37
EASE
SEWER
5'
PAUE
PAUE
"C"
6-212PM31 6/27/17
6
6
6S66°52
'30
"W
6
6
6
6
6 101.98
133.14(T)
109.92
55.59
6
"B"
.512Ac
.767Ac
108.49
242
.62
12
0
.82
66
.53
165.66
N15°45'40"W
S74
°14
'20
"W
15
6
.53
96.03
N49
°10'30
"E
8/28/17
42 43
44
74.77
ASSESSOR'S MAP
CONTRA COSTA COUNTY,CALIF.
BOOK PAGE192 24
STATE 2795 OR 247
NW COR. 661 OR 303
N86°19'E
N52°27'E
N57°36'15"E
S67°47'37"W
S74°04'02"W
N69°54'E
NE COR. 85
3
OR 27
6
SE COR. 42
9 D 205
S67°47'37"W
21.33
R=542
150.96
302.65
R=50
97.53
25
25
218.34
R=22
5
60.54
N11°09
'30"W
77
.42
118
.45
N.D.N78°50'30"E
N78°24'30"E
299.33
N.D.
119
.82
N78°24'30"E
300
18
1.9
40
0
.12
15
5
15
5
300
N11°35'30"W
N11°35
'30
"W S78°24'30"W
194
.91
336
.69
304.45
S81°26'E
15.11
(12 L.S.M. 12)
108.88
N74°45'E
90.73
110.00
E.In. 792 OR 190
S15°08'E
25
25
R=43.85
81.49
N31°37
'W
6.44
56
.65
R=100
S0°16
'W
19.92
49
.76
R=50
17.84
S56°45'W
25
46.83
153.81
27.86
79
.12
R=12
5
S13°45
'W 15
0
.44
92.40
31.05
76
.67
60
.18
184.06
185.02
(.25Ac.)
(.21Ac.)
50
' R/W
( 12 L.S.M.12)
(.18Ac.)
SE COR. 1.173
Ac. PAR.
81
6
OR 115
(.23
Ac.)
(.06
4
Ac.)
(.09
Ac.)
(12 L.S.M.12)
25
9
.33
(.05
Ac.)
LN.
LAVEROCK
N86°30'W 263.45
N79°31'24"W 139.57 20.0 S78°24'30"W
169.42
189.42
1764
-OR-206
(.07Ac.)
N13
°14
'44"W
10
6.86
"A""B"
N4°00'W
20
0.00
22
9
.44
N0°28
'E
173
.87
R=1260
31.1
30.4925
.08 62.24 25
172.6
25
25
N78°39'E 38
31.88
36.15
R=527
42.49
130.87
53.5
W. In. 818 OR 115 148.77
187
P.B.
25
26
240
23
300
.15
N7°08
'W
143.07'
N86°11'37"W
(.04Ac.)
173.35
S63°47'W
N68°13'W
25
17
20
14
18
11
05
15 16 22
240
(8-74)
DR.
VERNAL
RANCHO SAN RAMON
1-
1
1
1
1
LIVORNA
RD.
40.47
1"=100'
19
A-TRACT 8549
A
A
A
A
131.23
132.22
16
6
.25
N11°0'24"E
LOT 1LOT 2
21
23
LOT 1
LOT 3
LOT 2
B
B
B
B
B-TRACT 8394 MB 452-24
N67°30'0"E
12 PM 42
MB 451-1
ACC EASE
N78°50'49"EN79°05'05"W
N14
°11'19
"E
N86°03'41"W
N11°09'11"W
(.05AC)
.491Ac
ACC EASE
N11°09'11"W
N78°50'49"E
N11°05
'58
"W
S80°59'41"E
5/14/70
37.96
S35°48
'27"E
95.52
R=42.5
22.77
61
.69
N11°40
'W122.13
133.16
N81°08'41"W
185.64
119
.14
209
FM 5-12
.724Ac
.534Ac
.459Ac
181.70(T)
N67°30'E
73.17
166.54
N8°43'19"W
N11°05'58"W
18.94
.73Ac
116.0
1.253Ac.89Ac
1.07Ac
1.25Ac
.856Ac
.509Ac
1.19Ac
WLY COR 167Ac PCL
249.27
"A"
"B"
24
.952Ac
377.11
197.65
179.52
145
.45
111
.19
190.53
S06°43
'24
"E
N73°59'36"E74.71
2
2
2
2
2
2
2
2-209PM24 4/17/15
SCENIC EASEMENT
SCENIC EASEMENT
35.73
25.25 196.50
48.31
2.54
PURPOSES ONLY. NO LIABILITY IS ASSUMED
FOR THE ACCURACY OF THE INFORMATION
NOTE: THIS MAP WAS PREPARED FOR ASSESSMENT
DELINEATED HEREON. ASSESSOR'S PARCELS
OR BUILDING SITE ORDINANCES.
MAY NOT COMPLY WITH LOCAL LOT SPLIT
1.523Ac
PM24
9/3/15
25' R/W
ASSESSOR'S MAP
CONTRA COSTA COUNTY,CALIF.
BOOK PAGE193 21
A
A
A A
55-8
210
3633
19
20
19
6
62
86
61
37
36
21
0
POR. NE ‚ SEC. 17 T1S R1W MDBM
A-1989 TRACT 7062 M.B.329-5
NO
TE
:
ACTUA
L ROA
D
W
IDTHS UN
K
N
O
W
N
ROA
D
VA
LL
E
Y
STON
E
"B"
"C"
"D"
TRACT 4030
M.B. 133-8
W.O.P.
9-30-70
TRACT 4999
M.B.205-46
12-28-77
TR. 7063
4-13-89
M.B. 332-29
NE COR. 5.29
9
Ac. PAR.
FILE
#3
3
0
0
4
A
1
2
3
4 5
6
7
8 9
14
15
16
13
17
18
19
20 21
22
23
24 25 09
10
06
588.65
N0°38'30"E 874.5'
285.85
2024.22
S0°37'43"E 910.77 194.50
68.34
N89°22'E
100N70°55'E
N35°35'30"E-84.74
R=160
0
23
3
.35
69.47
30
8
.31
532
.87
S73°18
'E
186
.17
R=200
0
169
.68
N67°58
'W
470.71
S72
°00'10
"W
633
N0°07'23"W
177.79
193.0 168.8
13
0
.023
8.0
N0°49'50"E
115
.0
N88°08
'39"E
130.170.0
115
.0
187.71
12
0
.0
116
.57
12
3.0
30.
15
.2930
.28
.92
59
.76 41
.79
172.79
14
3
.0
59
.7728.63
39.25
R=45
109.0133.66
115
.0
N76
°39
'03
"WN86
°59
'16
"E
101.43R=372
14
3
.92
10
8
.12
139
.55
5.74
14
3
.92
33.98
R=20
R=20
28
.85
N1°51'21"W
135.07
16
5
.55
74
8.84
N0°50'34"E
442.06
N88
°38
'30
"E
68
9
.74
'
16
9
.70
170
.00
69
6
.31'
288.76
N0°25'49"E
N0°25'49"E
270.07
86
.48
114
.09
N84
°59
'12"E
19
6
.00
N84
°35
'57
"E
24
3.27
31
8
.57
N70
°16'44
"E
128.24 ?
90.13
N24°E
5.51
44.22
237.31
(T)
128.24'
N0°47'12"E R=20
21.47
R=45133.59
N0°50'34"E
76
7
.42
76
7.51
N6°42'W
860.51
1"=20
0
'
25' EASE.
??
?
.58
7-26-89
PURPOSES ONLY. NO LIABILITY IS ASSUMED
FOR THE ACCURACY OF THE INFORMATION
NOTE: THIS MAP WAS PREPARED FOR ASSESSMENT
DELINEATED HEREON. ASSESSOR'S PARCELS
OR BUILDING SITE ORDINANCES.
MAY NOT COMPLY WITH LOCAL LOT SPLIT
.475Ac
OAKS
34
.37
DR
.503Ac .501Ac
.752Ac
29 30 33
34
"A""B""C"
"D"
M
EAD
O
W
GRO
V
E
CT
1 1
1-213PM42 4-10-18
1
1
126.16 125.49135.97 170.74
16
9.24
16
4
.08
179
.38
N84°32'50"W
125.75
53.9560.79
ROYAL
222.84
22.54
4/4/19
1.423Ac
14.31Ac
10.210Ac
1.114Ac
1.278Ac
14
.48
Ac
.60
Ac
26.21Ac
13
.80
Ac
16.85Ac
13
1.02
S87°35'49
"E
63.9
34.37
R=45 39.13
27.1
63.79
38.71
47
.32
N5°27'10"E
33,34
28
29
10
09
14
15
23
24
25
06
19
20
21
31
30
17
37
35
41
40
22
23
34
31
10
38
39
26
45
43
CABALLO
RANCHERO
DRIVE
NUESTRA
A CASA
34
36
38
24
32
33
352
351
50
4.97
N23
°58'48"E
19.26
14
6
.17
212.76
82.24
R=1025
R=975 S74°30'30"E
290
14078.17
340.70
215
.83
20
0
.16
55
6
.16
N78°59'20"W
119.50
N43°08'16"W
32.36 S88°07'46"E
78.68
N4°44'19"W
24.02
N12
°42'42
"E
356.0
31
3
.91
244.39
N81°51'11"W
189.04
N9°19
'56
"E
N81°51'11"W
250
217
339.15247.62
113.74
N17°59
'W
123
.74
45
73
.38
N16°19'03
"W
188.64
229.20
S86°54'15"W
N82°33'35"E
141
.78
324
.11
S70°43'56"W
144
.43
28
1
.43
180.49
18
0
N16°19'05
"W
113.05
N79°03'45"E
168.06
N55°21'22"E
118.50
38.67
N36°00'30"W
17.80
N60°40'45"E
S56
°17'35"E
40
.56
14
6
.19
'
191.58
99
.59
179.25'
N71°43'19"W
205.63
187.61
27.49
21
0
.39
'
25
0
.55
'
N19°41
'07
"E
N20
°49'57
"E
38
6
.58
'
S21
°56'W
20
9
.27
'
49
9
.26
92.70'
209
.27
16
15.81'
R=300174.10
R=350
164.93
70.25
118
.27
S43°50
'57"W
139.41
N74°30'30"W
120.18
173
.09 N29
°31'20
"E
30
2
.79
N19
°22
'01
"E 185
S29°14'50
"W
110
135.19
228.81
59.08
141
.60
S12°51'E S61°11'20"E
276.13
370.77
311.91
149
.84
107.81
S51°00'00"E
258.96
253.82
S69°41'20"E
151
.68
265.54
181.32
210
.44
158
.61
160'
56.69
232.38
S48°E
70
.00
S25°30
'E
157.13R=375R=32
5
158
.87
52.95
30
20.9156.55
N9°12'46"E
32.56
73
.70
76
.55
198.97
R=22
5R=27
5
132.36
88.81
S75°34'45"E
N47°2'40"W
158.36
192.19
287.40
332
.40
381.17
289.64
33.0
303
.61
S51°00'00"E
N51°W
89.92
S56°57'27"W
S49°30
'10"W
170
.52
181.75
161.15
S1°04'48"E
326.58'
236.82
197
.91
N88°55'12"E
N1°04'48"W 98.90
R=175
R=125
70.64 73.70 123.04
221.99N83°22'45"W 131.97R=129.43R=89.4391.19
25.11
21.71
161.40
N13°00
'20"E
N24°57'30"W
178.25
L=22.37'
79
.60
N1°22'18"W
S1°22'18"E
181.79
208.79
27'
S61°01'
278
.78
N57°30'E
59.03
13
3
.83117.48
N28°20'E
90
'
201.39
N52°05'07"E
85'
S9°30'E
95
S12°E
288.42
S36°47'22"E
130
161
.72
19.02 S26°57
'43
"E
55.26
S1°22'18"E
122.18R=207.90
R=227
.90
145
.68
149.59
N58°37'45"W
10
17
"A"
"A"
4 10
10
9
910
"A""B"
18
19
12 12
"A"
"B"
345
5
1
1
"A"
25
'R/W
"B"
12 12 1
1 5
7
3
7
3
"B"
"B"
"A"
"A"
"C"
7
7
7
"B"
3
13
2
"C"
"A"
"A"
7
8
8
8
"B"
6
5 2
1
5
8
6 "A"
SAN
.
ESMT
"B"
20' R/W
(.09Ac.)(.09Ac.)
25'R/W
21
22
20
(.09Ac.)
9
9
"B"
"C"
6
20'EASE
6
"B"
"C"
11
01
11"D"
23
2
2
13
2
24
3
R.J.C. '5955-62, 63
351
352
153PM41
1-
2-
3-
4-
6-
7-
8-
9-
11-
12-
13-
10-
ASSESSOR'S MAP
CONTRA COSTA COUNTY,CALIF.
BOOK PAGE195 35
25
1"=200'
Sanborn Date : 11/06/1999
54
.66
54.78
PURPOSES ONLY. NO LIABILITY IS ASSUMED
FOR THE ACCURACY OF THE INFORMATION
NOTE: THIS MAP WAS PREPARED FOR ASSESSMENT
DELINEATED HEREON. ASSESSOR'S PARCELS
OR BUILDING SITE ORDINANCES.
MAY NOT COMPLY WITH LOCAL LOT SPLIT
50.51
149
.31
.97Ac
153.2479.33
165.37
N79°29'23"W
98.91
S46
°32
'52
"W
15
8
.25
59
.74
67
.36
58
.78
79.02
N37°31'56"W
104
.73
N45
°2'E
31
4/14/08
PAGE 38
5-
N0°32
'E
S-17
10
5.20
S0°27'E
13
13
N57°1'15"E
S56°W
180
N51°W
N39°E
S36°0'30"E
S72°1'W
3.72 342.55(T)
338.83N1°36
'56"W
1.42Ac
FROM
N30°08'03"E
R=105
43.71
66.43
1.13Ac
MT DIABLO ESTATE PARK SUB'N UNIT NO 3
20PM46
25PM40
30PM28
34PM5
49PM39
54PM7
63PM15
77PM16
90PM25
77PM44
20PM8 12/23/71
MB 49-7 12/12/1952
1.14Ac
"A"
"B"
1.91Ac
1.00Ac
1.00Ac
1.14Ac
.92Ac
1.01Ac
1.00Ac
2.02Ac
1.33Ac
1.32Ac
1.08Ac
1.84Ac
45LSM30 11/17/66
"B"
18
"A"
1.34Ac
1.04Ac
1.12Ac
1.08Ac
1.40Ac
1.17Ac
1.13Ac
44
"A"
"B"
N66°14'48"W
14.39
.947Ac
17
4
.13
33
0
.84
45.78
N11°30'37"E
14
14
14
14
14
14-202PM8 3/18/08
5/23/79
6/15/79
10/23/80
8/9/91
2/14/72
12/19/72
2/9/78
10/10/73
6/3/74
11/3/76
4/19/77
N84°30'30"W
1.289Ac
N21°02
'19
"E
153.82
52.0
150.98
159.68 N28
°16'17
"E
330.0
EASE
31'
C
AC
SSE
N61°11'20"W
(N61°20'09"W)
N28°22
'48
"E 21
8
.21
(T)
S20
°41
'25
"W 18
1
.15 109
.69
N28
°22
'48
"E 17
7
.38 146.26
S12°16'54"W
46
47
45.3
1.07Ac
1.01Ac
1.26Ac
.95Ac
1.22Ac
46,47
10/5/15
ASSESSOR'S MAP
CONTRA COSTA COUNTY,CALIF.
BOOK PAGE197 09
42.54
60
30
.
0
4
224.9
4
179.9
4
42.54
1
1
1
1
W.COR.
996 O
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100
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32
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2259
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R
5
8
6
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122.76
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5
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184.
8
81.84
101.78
S47^4
5
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10
10
45.32
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67
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3
2
71
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9
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3
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199.6
1
248.
1
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3
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8
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^
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66
.
6
6
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82.01
N4
6
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68.6
6
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1
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3
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3
2
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88
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5
2
8 8
16
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R
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W
97.9
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4
3
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4
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0
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OV
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R
L
A
P
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1
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9
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W
111.96
22
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7
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5
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N4
6
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3
5
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19
5
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0
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W
113.95
1010
19
5
.
0
4
21
7
.
8
4
100
S46^2
0
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21
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4
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6
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6
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6
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24
4
.
0
2
24
7
.
4
6
46
5
.
3
26
6
.
8
2
06
07
08
20
12
13
14
21
01
02
03
.58Ac.
1.46Ac..55Ac.
.89Ac.
.52Ac.
.50Ac.
5.07Ac.
.70Ac.
.30Ac.
32
6
.
4
7
DANV
I
L
L
E
BLVD
.
WA
Y
N
E
AV
E
.
EL
P
O
R
T
A
L
THIS MAP WILL NOT MATCH
PAGES ACROSS CREEK.
201
P.B.
200
P.B.
090
21
07
RANCHO SAN RAMON
1-12-4-87
090
1/67
1"=1
0
0
'
MOST S
L
Y
.
C
O
R
.
84.28
PURPOSES ONLY. NO LIABILITY IS ASSUMED
FOR THE ACCURACY OF THE INFORMATION
NOTE: THIS MAP WAS PREPARED FOR ASSESSMENT
DELINEATED HEREON. ASSESSOR'S PARCELS
MAY NOT COMPLY WITH LOCAL LOT SPLIT
OR BUILDING SITE ORDINANCES.
N42^1
5
'
W
N0
3
^
5
7
'
W
76
.
1
1
80.28
8
21
8
.
2
0
13
0
.
8
6
1.24Ac.
.85Ac.
43.78N43^
1
8
'
2
3
"
W
32.19
N68^
3
5
'
1
2
"
W
21
3/7/06
FM 6-23
85LSM38
32.19
ASSESSOR'S MAP
CONTRA COSTA COUNTY,CALIF.
BOOK PAGE198 08
2829303132333435363738
ALAMO VILLA SITES
POR. RO. SAN RAMON
ALAMO VILLA ESTATES
A-
B-
M.B. 15-317
M.B. 33-34
B A
A
B
A
SOUTH AVENUE
LA SERENA
LA
SE
R
E
N
A
WA
Y
AVENUE
45689
10 11 12 13 14 15 16
01020304
21
06070809
10 11 12 13
14
15 16 17 18 19 20
01 02
03
04 05 06
07 08 09 10
16
6
.
0
8
17
9
.
6
3
18
1
.
1
8
18
8
.
7
3
19
6
.
2
8
20
9
.
8
2
21
1
.
3
7
21
8
.
3
2
23
4
.
0
1
24
1
.
5
6
25
1
.
4
7
100
S3
9
^
4
7
'
E
100
100.20
95.771298.95
N54^30'E
082
081
R=2
0
R=2
0
79.99 100
N50^11'E
100 110 110
17
8
15
7
.
9
9
5 6 7 8 9
S3
9
^
4
7
'
E
07
05
09
11
12
06
S50^11'W
E C
O
R
.
116
2
O
R
.
2
6
4
110 110
19
8
19
8
TOTAL-1100
110
19
8
19
8
A
B
17
8
110
S3
9
^
4
7
'
E
1' POR. LOT 3
110110220
19
8
19
8
20
3
10
25
110
32.3
77.68
10'
N39^54'W
N50^11'E
80.01R=
2
0
R=
2
0
N3
9
^
4
7
'
W
16
9
.
0
1
20
6
18
3
S3
9
^
4
7
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E
4
6-9
081
082
1"=
1
0
0
'
B. L. 98
110
110
22
"A""B"
207PM111-4-11-12
1
1
1
1
PURPOSES ONLY. NO LIABILITY IS ASSUMED
FOR THE ACCURACY OF THE INFORMATION
NOTE: THIS MAP WAS PREPARED FOR ASSESSMENT
DELINEATED HEREON. ASSESSOR'S PARCELS
MAY NOT COMPLY WITH LOCAL LOT SPLIT
OR BUILDING SITE ORDINANCES.
220
.50Ac .50Ac
15' DEDICATED TO COUNTY110
7/31/12
207
PM11
50
50
ASSESSOR'S MAP
CONTRA COSTA COUNTY,CALIF.
BOOK PAGE198 10
1"=200'
FM. PG.10 03-27-96
100
100
04
888.78
459.21
254.8
103.38
183.99
104.21
115.15
S40°18'10"E
20
N48°18'10"E
N5°32'45"W
S25°54'32"E
N27°6'51"W
N34°43'51"W
75.01N55°49'19"E
N57°0'55"E
1252.38
N37°18'10"W
710.49
N49°41'50"E
19 11
15
18
HEMME AVE
N59°1"30"E
RO SAN RAMON
20
S40°18'10"E
52'
14
2.44
N27°46'56"W
05
.917Ac
1.81Ac10.41
N62°55'22"W280.66
N62°55'22"W289.93
N49°41"50"E
148.68
201.75
129.42
158.18
244.4
184.23
SCENIC EASEMENT
2
21
1
1
1-209P.M.43 8-27-15
"A"
"B"
"C"
24.269Ac
(.237Ac)
(.398Ac)
AYER 2095-157
NW COR
N26°11'48"E
(.03Ac)
(.472Ac)
DEDICATED TO CITY
26' PUBLIC R\W
12/13/21
234.54
282.49
(517.24)
101.75
67.2
16
14
.95Ac
2-2-27-19215P.M.3
S42°44'2"E
132.98
41.2
26'
40'
6.01
20.01
170.65
S49°41'50"W
41.267.2
87.03
N40°18'10"W
2
2
13
.462Ac238.07
N62°55'22"W
343.22
30
1.444Ac
"B"
"A"
15
15,16
PURPOSES ONLY. NO LIABILITY IS ASSUMED
FOR THE ACCURACY OF THE INFORMATION
NOTE: THIS MAP WAS PREPARED FOR ASSESSMENT
DELINEATED HEREON. ASSESSOR'S PARCELS
OR BUILDING SITE ORDINANCES.
MAY NOT COMPLY WITH LOCAL LOT SPLIT
ASSESSOR'S MAP
CONTRA COSTA COUNTY,CALIF.
BOOK PAGE201 01
'586-16
1-16-85
010
POR. RANCHO SAN RAMON
02
197
198
04
010
01
02
03
04
05
06
08
09
10
11
12
13
14
15
16
17
18
CAMILLE
.09Ac.
.04Ac.
.04Ac.
.03Ac.
.07Ac.
.07Ac.
.05Ac.
E. COR. 985 OR 311
MOST NLY. COR.
924 OR 471
.15Ac.
NW LINE 2778 OR 302
PANGBURN
LANE
MOST ELY. COR. 2.39Ac.
PAR. 2322 OR 517
284.74
399.74
POR 872-7-44 J PCL 39
872-7-44 J PCL 38
3.37Ac.
201-010-019
POR 872-7-44 J PCL 37
373.15
60
20 20
118.26
185.15
184.71
N43°40'E
131.01
170.0494
N46°20'W
S47°37'W
94
74.99
S43°40'W
S46°20'E
100.25
73
134.2294
170.04
94
170.04
S46°20'E
20
20
45
149.69 88.95
S47°37'W
25
25
N41°W
ND
ND
ND
S46°11'50"E
ND
136.58N46°20'W
30
30
135.73
ND
160.46
127.06
208 S46°20'E
MOST NLY. COR. 2.28Ac.
S44°12'24"W
S45°37'E
125 ND
86
177.60
S45°37'E
207.20
32.92
22.14
146.82
124.68
S45°37'E 174.06
189.06170.94
S44°30'24"W
189.96 140
N44°23'E
25
25
121194.22
125
S45°37'E
76.85S18°48'30"E 115
208.54
15
80.33107.80 N45°37'W
110
S44°23'W
110
125 N45°37'W
208.54
N44°23'E
174.74
129.66
172.13 208.61
60
DANVILLE
LEONA
N46°20'W
73
100.25
184.71
PAR. 2322 OR 514
Sanborn Date : 11/06/1999
PURPOSES ONLY. NO LIABILITY IS ASSUMED
FOR THE ACCURACY OF THE INFORMATION
NOTE: THIS MAP WAS PREPARED FOR ASSESSMENT
DELINEATED HEREON. ASSESSOR'S PARCELS
OR BUILDING SITE ORDINANCES.
MAY NOT COMPLY WITH LOCAL LOT SPLIT
BLVD
CT
AVE
S
P
R
R
.54Ac
.54Ac
.50Ac
.59Ac
.59Ac
.50Ac
.55Ac
.83Ac
.53Ac
.53Ac
.50Ac
.28Ac
.33Ac
.37Ac
.36Ac
.25Ac
.33Ac
N44°29'8"E
4.34
N47°48'18"W108.49
151.10
259.59
149.75
23
1"=100'
TR
N44°30'E
N45°21'E
190
191.96
86.44209.60
197.32
S48°28'W
188.01
N43°40'E
N44°29'8"E
A-2023 ROLL-
A
5
1
TR 9504 (XAVIER ESTATES)M.B. 551-21
A
6
A
A
A
4
3
2
24
25
26
21
.652Ac
.650Ac .539Ac
.572Ac
.603Ac
XAVIER
CT
(PVT RD)
119.35(T)
N12°8'55"E
129.5(T)
20.86
S67°49'41"E
228.20(T)
8/17/22
9504
22
194.94(T)
S50°376"'W
S44°39'E148.27(T)
152.89(T)
N12°31'46"W
.597Ac
ASSESSOR'S MAP
CONTRA COSTA COUNTY,CALIF.
BOOK PAGE362 23
N42°03'55"E
N.D.
S79°35'25"W
S57°13'45"W
721.96
206.16S74°52'10"W
DRAIN EASE.
40.99
153.46
R=175
143.32
R=225
R=105
91.53
R=155
113.89
S78°10'07"W
339.23
N.D.
N81°03'53"E
30
30
414.89
N71°26'37"E
S60°20'W
N61°33'53"E
583.23
R=470
21.67
S78°31'05"E
185.10
R=20
31.90
R=575
25.04
220.21
R=225
R=20
31.00
125.84
R=625
258.96
R=275
527.48
N78°31'05"E
S78°31'05"E265.73
30'30'
N48°03'53"E
494.14
8.88
N11°23'39"W
95.97
426.62
N87°28'47"E 146.19
S53°46'13"E
192.3
46.11
63.0645.57595.55
N89°36'32"W
S7°38'W
N7°38'E
336.87
705.01
88'
N9°15'53"E
203.19
209.64
30.07
R=20
R=20
60'
165.66
32.76 44.76
N7°38'E
S21°10'33"E
136.95
S66°00'30"E
32.32 86.38
281.71
S73°00'00"E249.39
N61°33'53"E
353.92
318.72
R=270
389.54
R=330
S7°38'W
60.36
31.42
66.02R=20
R=20
66.02
31.42
N82°22'W
N82°22'W
N27°20'W
S31°39'43"W
241.20
N.B.
S63°05'11"W
480.49
R=525
203.66
N72°21'57"W48.22
N30°00'E
249.92247.30
S30°00'E
TIE
N9°15'53"E
110.88S59°15'E
165.00
S39°45'W
209.98
N61°41'15"E
412.42S58°42'45"E
100.20
R=110
STA. POST AT C RD.STA. POST D.S.
564.00
N23°25'35"E
1501.63
23006
07230
14
15
11
12
13
2.963Ac.
.711Ac.
88.90
N71°10'50"E
N41°16'13"W
2-20-73 C.C.
RO. CANADA DEL HAMBRE
1"=200'
358
P.B.
L
FLOOD
ZONE
LINE
FRANKLIN
CANYON
ROAD
TO STATE
664-OR-28
SLOPE EASE. (1.13Ac)
ROAD
HILL
BARRY
1.655 Ac.
1.046 AC.
1.836 AC.
CUMMING'S
SKYWAY
SLOPE EASE. (2.26Ac)
Sanborn Date : 12/22/1998
N63°10'20"E
PURPOSES ONLY. NO LIABILITY IS ASSUMED
FOR THE ACCURACY OF THE INFORMATION
NOTE: THIS MAP WAS PREPARED FOR ASSESSMENT
DELINEATED HEREON. ASSESSOR'S PARCELS
OR BUILDING SITE ORDINANCES.
MAY NOT COMPLY WITH LOCAL LOT SPLIT
16
10.406Ac
5/14/19
16
159
P.B.
378
P.B.
19 21
22
15
010
24
23
09
13
12
11
03
010
02
S.&O. SURVEY NO. 147
POR. RO. LAS JUNTAS
57 L.S.M.8
60 L.S.M.23 & 24
1 -
2 -
6/13/74
2-17-76
N77°56'56"W
176.95
159
.77
990
.16
(27)
S76°08'16"E
790.36
1711.47
N62°00'00"W
29
0
.38
S44
°35
'15"W
N84°44'15"E
448.09
N77°14'31"E
42.95
R=50
76.04
N2°24
'00
"W
18
6
.44
20
0
.21
(560.87)
560.90N59°00'06"W
796.88
(1142.14)
N62°00'00"W
751.77
N89°23'20"E
111
8.91
N0°36
'40
"W
126.98
N84°34'20"E
521.28
S88°08'19"E
31.62
S1°10'04"W
60.17
S1°51'37"W
17.95
R=60
79.47
S75°00'00"E255.00
R=91
165
.75
289
.61
R=159R=208
.91-380.52
N76°47'36"E
326.37
N76°47'36"E
496.69
N76°48'27"E-425'
211.23
124.79'
S68°30'30"E
136.85
112.94
174.88
R=240
R=75
150.19
R=200
211
.38
S37°07'34"E
22.00Ac.
46.991Ac.
N28
°W
125
6
.88
"C"
2 2
2
STATE
N62°W
776.01
838.53
N62°00'00"W
205
.99S47°57'50"E
FREEWAY
(43)
400.13
N63°25'55"W
107
.70
25
'
632.45
N62°00'00"W
R=2125
-337.30
R=2150
25'
R=2125.13
740.11
838
.98
2 119.54
N87°22'45"E
60
1349.015
N76°47'36"E299.39
N76°47'36"E
459.17
2
R=5679.65
R=5779.65
670.81
603.11
R=1066R=1134
525.54
2 118.24S27°48'35"W
200.01120.13
606.95 S70°35'02"E
501.15
S70°35'02"E448.42
L=3.84
196
.39
293.64
136.07
444.86
R=1566
R=1634 328.11
497.50 S46°56'42"E
331.34
2
2
19
8
.37
11°22
'04
"W
2008.29
49.306 Ac.
2008
.29
N54°18'27"W
S54°18'27"E
(71)
S54°17'36"E
RO. LAS JUNTAS
1846.92
283.09
307
.50
771
.01
29.74
N56°17'25"E
N.D.
"B"
2
"B"
N33°42
'35"W
1.45Ac.
2
227.59
N56°17'25"E
2.723Ac.
157
1
.39
"A"
1591.37
2
77.565
148.525Ac.
CODE LINE
N.D.
(40)
S P
R R
SEE 159-31
N70°17'30"E
FM. 109-2
(31)
STATE
68760
12-11-58
7.34Ac.
N64°41'17"W
52.73
989.82(68)
1"=500'
50'R/W FOR SEWER
C.C.C.SAN. DIST.
M/R BELOW 500'
SHELL OIL CO.
2.96Ac.
26
R=684
196.71
N56°17'25"E
.83Ac
602
.26
(.40Ac.)
S56°17'25"W
(46
)
N33°32'32"W
N31°32'22"E
259
.04
2.7643Ac
03
S36°4'53"E
152.46
N36°42'00"W
201
.41N31°32'22"E
36.12
N12°13'27"W
422
.37
N48°29'06"WS33°32'32"E
573.38
N36°42'00"
350
698
.11
712.68
R=1900
(39
)
289.28
N41°51'49"W
S33°24'00"E
R=185
P.O.B.
529.95
N62°W -595.45
533.04
WATERFRONT
ROAD
S86°32'W
93.63 647.25
R=99.5
S87°00'51"E
R=350.32
R=278.33
400
.26
- RO.LAS JUANTAS
BOUN
D
A
RY LINE
SANBON DATE : 12/11/1998
S & O
147
N48°29'06"W
S87°26'30"E
116.49
204.87
N48°35'50"W
R=2125
S78°39'40"W
N83°48'06"W
ASSESSOR'S MAP
BOOK PAGE380 01
35
4.08
N9°35
'20"E
47
3
.30
109.5
100
.62
N56°17'25"E
S24
°16'59"E
N86°59'25"E 36.56
R=616
From page 02
302.27
300
75
3.892Ac
S62°56'5"E
4.417Ac
2.646Ac
569
.42(T)
N57°13'45"E
N56°17'25"E
F-13
E-12,13
PURPOSES ONLY. NO LIABILITY IS ASSUMED
FOR THE ACCURACY OF THE INFORMATION
NOTE: THIS MAP WAS PREPARED FOR ASSESSMENT
DELINEATED HEREON. ASSESSOR'S PARCELS
OR BUILDING SITE ORDINANCES.
MAY NOT COMPLY WITH LOCAL LOT SPLIT
25
27
R=66
6
482.49
R=96
198.17
R=634
286
.88
179
.43
R=128
ASSESSOR'S MAP
CONTRA COSTA COUNTY,CALIF.
BOOK PAGE408 9
04
17
40
33
34
42
06
29
09
16
28
46
36 37
38
12
22
08
13
19
20
090
090
N.D.N.D.
99
N3°00'E
N63°30'E
256.74
97.218
EAST
277.58
N33°00'E
290.40
482.40
N32°28'E
422.40
N.D.
235.34 20259
387
NORTH
WEST
142.30135.28
135.28
226
161
161
N89°56'30"E
387
25
100
100
100
100
30
113.05
113.05
SOUTH
WEST 820.00300
S42°45'W
A-4-2
SOUTH
628.88
699.66
121.31
N75°19'E
R=970
30
187.13
272.26
N75°19'E
R=50
45
N13°35'25"W
578.04
S76°24'35"W
N76°24'35"W
75
75
N75°20'E
R=50
65.67
162.60
374.02
25'
48'
SOUTH 25.61
25.61
30
N.D.
225.95
26.74
S88°51'29"W
S73°51'39"W87.42
N73°51'20"E
178.81
R=634.58
R=774.58
206.16
S1°09'30"W
273.29
S87°W
77'
270.16
247.63
78.30
S5°29'W
41.05
6'
R=700
242.11
R=800
75'
75'
1"=200'
FM. 1/30-31 5-14-59 G.C.C.
PARR
BLVD.
G
O
O
DRIC
K
AV
E.
1
17 24
LOT 201
"B"
1
"A"
1
1
"C"
SAN PABLO RANCHO
SEC 35 T2N R5W MDBM
61L.S.M.2 6-16-761-
SAN PABLO RANCHO
25
ST.
3RD SAN
CREEK
628.88
10
41
562.782(TOTAL)
N44°13'28"E
N44°13'28"E
N1°2'37"E 406.98
N.D.
N.D.
N.D.
558.65
N89°0'53"W 396.35
14.07
N89°0'53"W
56.7
S25°42'W
ND
S48°24'W
276.69
23.34
RICHMOND PARKWAY
PABLO
PARKWAY
RICHMOND
FM PG 13
617.42
316.80
S1°2'18"W
387
165 165
222
300.62 316.80
43
PURPOSES ONLY. NO LIABILITY IS ASSUMED
FOR THE ACCURACY OF THE INFORMATION
NOTE: THIS MAP WAS PREPARED FOR ASSESSMENT
DELINEATED HEREON. ASSESSOR'S PARCELS
OR BUILDING SITE ORDINANCES.
MAY NOT COMPLY WITH LOCAL LOT SPLIT
35
N89°56'30"E200
200
2.0
78.16
S62°6'29"W102.70
197.16
S73°51'39"W
DED.TO COUNTY
03-0597799
12/10/03
45
176.90S65°33'12"W
S1°3'12"W
550.02
627
693
NORTH
47
185.16
183.68
N1°3'29"E
518.88
N76°24'15"E 25
91.43
589.09
40.79
35
R=1215.91
2.0
70.34
R=1213.91
87.99
N1°3'29"E
30.95
114.80
N1°3'29"E 104.37 70.21S88°56'31"E
N3°45'7"E
18.92
N44°12'52"E
736.49
N53°24'47"E
68.88
16.50
17.11
N02°24'15"E
N44°13'28"E763.92(T)N89°0'53"W
8.84Ac
10/10/17
.69Ac
2.19Ac
FROM PAGE 19
N01°01'59"E 1320.64
N88°56'48"W 410.00
1.00Ac
2.07Ac
1.077Ac
1.917Ac
1.97Ac
.50Ac
4.289Ac
1.74Ac
1.20Ac
1.00Ac
10.112Ac
.26Ac
.23Ac
9.196Ac
4.666Ac
.335Ac
.436Ac
.995Ac
49
50
N88°58'01"W 532.00
N88°58'05"W 346.00
R=68.00
106.82
N01°01'59"E 180.85
26.82
84.45
R=195.02
N88°58'01"W 316.25
160.29
271.75
N01°01'59"E 436.71
N88°58'01"W 1120.00
N01°01'59"E
N88°58'01"W
160.29
271.75
52,53
N01°01'58"E 236
N01°02'00"E
160.29
100
100
200
19
.46Ac
3.778Ac
S88°56'1"E 352.26
N88°56'01"W 307.82
N01°03'12"E 692.88
N88°56'48"W 250.00
N01°03'12"E 217.80
N01°03'12"E 217.80
100.00
N88°56'48"W
43.9
10.08
N84°17'55"W 235.48
N01°03'12"E 279.81
N88°56'48"W
150.85
R=920.00
345.52
68.63 6.57
53
5215.10
9.56
26.74
R=910.00
9.441Ac
N88°56'W 250.00
FROM PG 13
16.943Ac
ASSESSOR'S MAP
CONTRA COSTA COUNTY,CALIF.
BOOK PAGE409 08
100
25 25
80
27.85 25
27.85 25
100
80
52.85
20
20
SO°04'E
S89°56'W
25
100
100
25 25
S89°56'W
60'
60'
25 27.85
25
125
100
25
70'
60'60'
70'
G
RO
V
E
TRUMAN
FILBERT
60'
60'
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15 16 17
18
19
20
21
22
23
24
25
262728293031323334
18
09
7
561
P.B.
080
080
1-17
NORTH RICHMOND LAND & FERRY CO. TRACT NO. 2
69
1"=50'
1961 ROLL
02
05 06
07 08 09 10
12
25
19
21
22
23
Sanborn Date : 01/15/1999
PURPOSES ONLY. NO LIABILITY IS ASSUMED
FOR THE ACCURACY OF THE INFORMATION
NOTE: THIS MAP WAS PREPARED FOR ASSESSMENT
DELINEATED HEREON. ASSESSOR'S PARCELS
OR BUILDING SITE ORDINANCES.
MAY NOT COMPLY WITH LOCAL LOT SPLIT
24
C
HESLEY
MB 5-124
3RD ST
AV
E
ST
ST
AV
E
36.54
25
50.07(T)
S89°59'40"W
S0°1'00'E367.22(T)
27
7/2/18
99.98
"A"
.687Ac
"B"
.687Ac
88.44
28 50.06
50.03
230.72
367.22
50.01
1
1-
1
2/26/18213PM31
1 1
1
1
213
PM31
ASSESSOR'S MAP
CONTRA COSTA COUNTY,CALIF.
BOOK PAGE420 08
NORTH RICHMOND
HILL
C
R
E
S
T
ROAD
CE
R
R
I
T
O
RO
A
D
TRACT 4281
MB 168-22
5554
53
10
07
09
23
20
080
080
FM 3/58
30
30
S77^30'W
R=170
74.18
222.5'
S53^
2
9
'
4
5
"
W
158 100
'S39
^
4
5
'
W
105
.
1
7
R=1
8
0
S3
^
0
0
'
E
97
.
3
5
S2
0
^
0
1
'
0
7
"
W
36
.
6
4
27.
1
1
R=
1
2
0
48
S2
6
^
3
0
'
W
36
.
7
6
49.1
1
R=90'
107.51
66'S49^
3
0
'
W
N80^
W
193.8
0
TO C
O
N
T
R
A
C
O
S
T
A
C
O
U
N
T
Y
2470
O
R
4
3
2
35
.
1
6
N.D.
N.D.
N.D.N1
3
^
1
0
'
W
N.
D
.
20
0
'
N.
D
.
N1
3
^
1
0
'
W
60'
N.D
N.D.65
S68^49'E
7.61
7.61N80^
W
65.26
5.
8
2
82
11.8 S76^W
12
0
86 89.14
175.14S76^30'11"W
19
.
2
80
.
2
2
S1
3
^
3
9
'
1
2
"
E
10
0
19.78
50'
R=20
26.92
71.57
11
8
.
4
1
N1
2
^
3
0
'
5
1
"
W
200'
16.32
85
30
.
7
11
9
.
3
S1
5
^
3
0
'
W
54
.
5
8
65.2
8
'
100'
11
6
.
8
5
12
8
.
4
9
18
3
.
0
2
83.80
S57^4
4
'
4
0
"
W
108.7
7
80
N3
2
^
1
5
'
2
0
"
W
10
0
100'
N76^E
25
.
1
0
12
5
.
3
5
106.1
4S58^
5
8
'
0
6
"
W
56
.
5
3
S2
3
^
E
80
80
.
3
6
N3
6
^
2
9
'
0
2
"
W
98.50N58^5
8
'
0
6
"
E
18
.
8
9
80
N55
^
4
6
'
5
4
"
W
63
.
5
3
N.D
.316
.
4
6
'
325
234
.
5
4
S33
^
1
6
'
W
72
.
1
0
19
8
.
3
5
'
10
7
.
9
16
7
.
0
8
'
S4
^
1
5
'
W
195.6
N.
D
.
N1
3
^
1
0
'
W
N.
D
.
63
9
.
7
N68^49'E
366.6
S1
3
^
1
0
'
E
N.E.CO
R
1
9
5
1
O
R
2
6
9
10-
5
-
7
3
56
1
.
5
5
S1
3
^
2
4
'
1
5
"
E
N.
D
.
27
26
03
04
05 06
09
10
25
20
VAC
A
T
E
D
706
3
O
R
9
1
6
123
1"=100
'
S74
^
5
0
'
E
PURPOSES ONLY. NO LIABILITY IS ASSUMED
FOR THE ACCURACY OF THE INFORMATION
NOTE: THIS MAP WAS PREPARED FOR ASSESSMENT
DELINEATED HEREON. ASSESSOR'S PARCELS
MAY NOT COMPLY WITH LOCAL LOT SPLIT
OR BUILDING SITE ORDINANCES.
MB 1-18 11/2/1908
27
3/4/09
.25Ac
.23Ac.23Ac
.25Ac
4.74Ac
.27Ac
.20Ac
59
3
.
9
80
4
.
7
0
.
5.26Ac
S1
3
^
1
0
'
E
366.6
419
PB
4/11/74
10.373Ac
63
7
.
1
9
ASSESSOR'S MAP
CONTRA COSTA COUNTY,CALIF.
BOOK PAGE426 3
FM. 92/7
030
SAN PABLO RO. LINE
13
13
04
02
1-
288
288
119
134
N89°58'W
N89°58'W
N89°58'W
N89°58'W
N89°58'W
134
169
S89°58'E
152.36
144
67.00
67.00
119.00
60.36
60.36
227.36
119
100
100
119
1197.35
75 75
25
50
144
7.36119
70
107.34
24.89
R=40
R=40
R=40
24.89
24.89
R=40
41.36
R=40
24.89
R=40 41.36
107.34
8.43
70
119
39.36
70
70
11939.36
68 68
193.85
52'
12.47 S45°W
100.67
N35°03'46"W
82
95
S45°W
83.25
108.19
302.26
68
52
S0°02'W119
68
6.03
S82°21'50"W
119.83
150 150
60 60
N0°02'E
60 60
119
58.14
3.97
56.03 R=125131.35N89°58'W
62.97
68.59
N85°21'45"E N88°50'E
111.73
53.72
95
167.76
56.26
63.14
46.88
R=20
31.42
S76°51'40"E S61°10'50"E
S76°51'40"E
40
74.65
94.62
R=75
N54°50'40"E N61°10'50"W119.92
30
N28°49'10"E
120.61
R=385
74.78
33.95
94.67
125.95
205.16
S2°14'E
123.24
232.46
272.60
S54°49'55"E
N54°51'50"W
109.22
S13°26'30"W
355.80
45.78
S9°57'30"W
29
39
40
.89Ac.
"A"
1
1
1
134
21
22
A
23
24
25
26
27
28
A
A
A
10
11
12
13
14
15
16
17
18
33
.70Ac.
03
01
02
41
42
31
38
DRIVE
LINDELL
BALMORE
469
470
471
472
473
474
475
476
477478
479
480
481
482
483
484
485
1"=100'
A
70
B B
B
B
B
A-MB 35-10
B- 2008 ROLL-TRACT 8920 MB 505-47 10/5/07
S89°04'57"E
N58°37'30"E180.92
N44°5'45"W 185.49
N0°56'15"E
N45°E 111.05
EL SOBRANTE MANOR UNIT NO 5
POR LOT 248 SAN PABLO RANCHO
4 SEC 28 T2N R4W MDBMPOR SE 1/
97PM1 8/3/81
39
362.49
S36°56'45"E 87.40
S25°16'45"E 135.94
S15°27'31"E 120.62
S07°5'45"E 179.09
PURPOSES ONLY. NO LIABILITY IS ASSUMED
FOR THE ACCURACY OF THE INFORMATION
NOTE: THIS MAP WAS PREPARED FOR ASSESSMENT
DELINEATED HEREON. ASSESSOR'S PARCELS
OR BUILDING SITE ORDINANCES.
MAY NOT COMPLY WITH LOCAL LOT SPLIT
CT.20Ac
115.04
.20Ac
.34Ac
.50Ac
.50Ac
1.0Ac
.25Ac
.69Acc
.18Ac
.27Ac
.17Ac
B- 2016 ROLL-MB 526-1 9/11/15
25
71
5.485Ac
.950Ac
446.10(T)
393.49
197.01(T)
B
11/5/15
TO ACREAGE
REVERSION
70,71
REVERSION TO ACREAGE
ASSESSOR'S MAP
CONTRA COSTA COUNTY,CALIF.
BOOK PAGE430 16
1
1
1
1
1
2/7/66 E.H.
161
162
49.90
92.16
114.45
110.27
107.88N43°54'30"E
N40°05'E
.09Ac
.18Ac
R=20R=35N.D.
15.13
95.76
30
119.07
N42°32'50"E
N48°50'W
131.60
75.48
90.02
131.60
43.02
255.40
N40°05'EN40°05'E N43°14'E
126
N.D.
48.5954.43
82.00
49.8
125 125.440'
31.51R=20
39.02
86.38
60.13140.51
N43°38'E
N48°50'W
.14Ac
.11Ac
96.76513.56
98.48
60.1385.14
50
60.13
15.13
N.D
R=20R=35
SUNNY
ARGYLE
.63Ac
.44Ac
.20Ac
132.81
94.92
57.42
79.08
60
118.62
124.17
148.26
152.27
156.29
S43°31'10"W
"A"
"B"
2
2
2
N49°55'W
N43°38'E
N40°05'E
.18Ac
.20Ac
.17Ac
.18Ac
.18Ac
.19Ac
.19Ac
.20Ac
.21Ac
160.30
164.31
168.33
172.34
60
586.56
N40°05'E
93.47
48.22
9.11 50.08
44.41
110.13
72.61
156
98
77.34
98
77.34
N87°22'W
N40°08'E
N40°08'E
N49°55'W
"A"
"B"
N87°22'W
50'
S49°55'E
N40°08'E
98
98
"C"
77.34
77.34
250
250
580.77
.44Ac
290
300
10
156.26
80.29
N45°51'E
N40°08'E
N40°05'E
N59°18'E
.35Ac
N40°05'E
50'
1.19Ac
15
17
18
19
40
20
SEC. 34
RANCHO LINE
01
02
03
04
05
06
07
07
08
09
10
11
12
13
14
15
16
17
18
19
01
04
31.32R=20
162
06
161
93.29
POR. LOT 248 RO. SAN PABLO
POR. SEC.34 T2N R4W M.D.B.&M.
RECORD OF SURVEY
25 L.S.M. 37
1-
2-1975 1-27-64
1"=100'
41 L.S.M.48 4-20-66
130.53
82
61.43
N30°18'30"W37.75
N3°57'45"E
11.83
TO APN 430-401-020
102.0
HEATH DR920SF
.41Ac
.16Ac
.16Ac
.21Ac
PURPOSES ONLY. NO LIABILITY IS ASSUMED
FOR THE ACCURACY OF THE INFORMATION
NOTE: THIS MAP WAS PREPARED FOR ASSESSMENT
DELINEATED HEREON. ASSESSOR'S PARCELS
OR BUILDING SITE ORDINANCES.
MAY NOT COMPLY WITH LOCAL LOT SPLIT
RD
LN
"4"
"3""2"
"5"
"1"
90
82
70
90
82
76.45
S49°52'0"E
166.45(T)
115.18
60.49
115
115
88.46
108.46
95
94.76
95
47.73A
A
A
A
A
A-
23
2425
28
29
27
26
8,550SF
9,692SF
9,430SF
8,421SF
5,712SF
6,826SF
189.11
8
8
172.14N59°15'0"W
87.99 84.15
9465
5/2/22
TR 9465 MB 550-34 4/27/22
TR
1025 ESCOBAR STREET
MARTINEZ, CA 94553CONTRA COSTA COUNTY
Legislation Details (With Text)
File #: Version:125-383 Name:
Status:Type:Consent Item Passed
File created:In control:1/16/2025 BOARD OF SUPERVISORS
On agenda:Final action:2/4/2025 2/4/2025
Title:Acting as the governing body of the Contra Costa County Flood Control and Water Conservation
District, APPROVE and AUTHORIZE the Chief Engineer, or designee, to execute a contract
amendment with GEI Consultants, INC., effective February 4, 2025, to increase the payment limit by
$1,065,000 to a new payment limit of $2,065,000 and extend the term through September 29, 2027,
for on-call consulting services for professional engineering and technical services related to flood
control facility design, Brentwood area. (100% Flood Control District Funds)
Attachments:
Action ByDate Action ResultVer.Tally
approvedBOARD OF SUPERVISORS2/4/2025 1 Pass
To:The Contra Costa County Flood Control and Water Conservation District Board of Supervisors
From:Warren Lai, Public Works Director/Chief Engineer
Report Title:Contract Amendment with GEI Consultants, INC., Brentwood area.
☒Recommendation of the County Administrator ☐ Recommendation of Board Committee
RECOMMENDATIONS:
Acting as the governing body of the Contra Costa County Flood Control and Water Conservation District
(Flood Control District),APPROVE and AUTHORIZE the Chief Engineer,or designee,to execute a contract
amendment with GEI Consultants,INC.(GEI),effective February 4,2025,to increase the payment limit by
$1,065,000 to a new payment limit of $2,065,000 and extend the term through September 29,2027,for on-call
professional engineering and technical services relating to flood control facility design, Brentwood area.
FISCAL IMPACT:
This contract amendment is funded by 100% Flood Control District Funds. Project No. 7562-6D8492
BACKGROUND:
The Flood Control District,in coordination with the Contra Costa County Public Works Design/Construction
Division,has called upon GEI to design and prepare construction documents for the Lower Sand Creek Basin
(LSCB)Expansion Project.The purpose of the LSCB Expansion Project is to expand LSCB to its “ultimate”
configuration to provide improved flood protection to the Marsh Creek Watershed,Drainage Area 130 in Flood
Control Zone 1.Additionally,the City of Brentwood has begun work on the adjacent Sand Creek Sports Park,
which requires close coordination with the Flood Control District’s LSCB Expansion Project.Therefore,due to
the multifaceted nature of this project,the Flood Control District is increasing the payment limit and extending
the term for a single additional year of its agreement for on-call professional engineering and technical services
relating to flood control facility design.This amendment is necessary to ensure that timely services for design
of the LSCB Expansion Project are delivered in coordination with the City of Brentwood’s sports park project.
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CONSEQUENCE OF NEGATIVE ACTION:
Without the approval of the Board of Supervisors,the Flood Control District will not be able to obtain timely
on-call services for professional engineering and technical services relating to flood control facility design for
the LSCB Expansion Project.
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1025 ESCOBAR STREET
MARTINEZ, CA 94553CONTRA COSTA COUNTY
Legislation Details (With Text)
File #: Version:125-384 Name:
Status:Type:Consent Item Passed
File created:In control:1/15/2025 BOARD OF SUPERVISORS
On agenda:Final action:2/4/2025 2/4/2025
Title:AWARD and AUTHORIZE the Public Works Director, or designee, to execute a construction contract
in the amount of $1,090,000 with American Civil Constructors West Coast LLC for the Pleasant Hill
Road Bridge Over Taylor Boulevard Preventative Maintenance Project, Lafayette area. (43% Highway
Bridge Program Funds, 57% Local Road Funds)
Attachments:1. Attachment A - Valentine Ltr, 2. Attachment B - Decision on Valentine Appeal
Action ByDate Action ResultVer.Tally
approvedBOARD OF SUPERVISORS2/4/2025 1 Pass
To:Board of Supervisors
From:Warren Lai, Public Works Director/Chief Engineer
Report Title:Construction Contract for the Pleasant Hill Road Bridge Over Taylor Boulevard Preventative
Maintenance Project, Lafayette area.
☒Recommendation of the County Administrator ☐ Recommendation of Board Committee
RECOMMENDATIONS:
(1)APPROVE plans,specifications,and design for the Pleasant Hill Road Bridge Over Taylor Boulevard
Preventative Maintenance Project,Lafayette area.County Project No.0662-6R4086,Federal Project No.BRLS
-5928(154) (District IV)
(2)DETERMNE that Valentine Corporation (“Valentine”),the lowest monetary bidder,submitted a non-
responsive bid by failing to comply with the requirements of the County’s Disadvantaged Business Enterprise
(“DBE”) Program, as provided in the project specifications; and REJECT the bid on that basis.
(3)DETERMINE that American Civil Constructors West Coast LLC (“American Civil Constructors”),the
second lowest monetary bidder,has complied with the requirements of the County’s DBE Program for this
project,as provided in the project specifications;and FURTHER DETERMINE that American Civil
Constructors has submitted the lowest responsive and responsible bid for this project
(4)AWARD the construction contract for the above project to American Civil Constructors in the listed amount
($1,090,000.00)and the unit prices submitted in the bid,and DIRECT that American Civil Constructors shall
present two good and sufficient surety bonds,as indicated below,and that the Public Works Director,or
designee, shall prepare the contract.
(5)ORDER that,after the contractor has signed the contract and returned it,together with the bonds as noted
below and any required certificates of insurance and other required documents,and the Public Works Director
has reviewed and found them to be sufficient,the Public Works Director,or designee,is authorized to sign the
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contract for this Board.
(6)ORDER that,in accordance with the project specifications and/or upon signature of the contract by the
Public Works Director,or designee,and bid bonds posted by the bidders are to be exonerated and any checks or
cash submitted for security shall be returned.
(7)ORDER that,the Public Works Director,or designee,is authorized to sign any escrow agreements prepared
for this project to permit the direct payment of retentions into escrow or the substitution of securities for
moneys withheld by the County to ensure performance under the contract,pursuant to Public Contract Code
Section 22300.
(8)AUTHORIZE the Public Works Director,or designee,to order changes or additions to the work pursuant to
Public Contract Code section 20142
(9)DELEGATE,pursuant to Public Contract Code Section 4114,to the Public Works Director,or designee,the
Board’s functions under Public Contract Code Sections 4107 and 4110.
(10)DELEGATE,pursuant to Labor Code Section 6705,to the Public Works Director or to any registered civil
or structural engineer employed by the County the authority to accept detailed plans showing the design of
shoring,bracing,sloping,or other provisions to be made for worker protection during trench excavation
covered by that section.
(11)DECLARE that,should the award of the contract to American Civil Constructors be invalidated for any
reason,the Board would not in any event have awarded the contract to any other bidder,but instead would have
exercised its discretion to reject all of the bids received.Nothing in this Board Order shall prevent the Board
from re-awarding the contract to another bidder in cases where the successful bidder establishes a mistake,
refuses to sign the contract,or fails to furnish required bonds or insurance (see Public Contract Code Sections
5100-5107).
FISCAL IMPACT:
The construction contract and associated fees of this project will be funded by 43% Highway Bridge Program
(federal) Funds and 57% Local Road Funds.
BACKGROUND:
The above project was previously approved by the Board of Supervisors,plans and specifications were filed
with the Board,and bids were invited by the Public Works Director.On October 22,2024,the Public Works
Department received bids from the following contractors:
BIDDER, TOTAL AMOUNT, BOND AMOUNTS
Valentine Corporation, $1,013,369.00
American Civil Constructors West Coast LLC,$1,090,000.00;Payment Bond:$1,090,000.00;Performance
Bond: $1,090,000.00
Kerex Engineering, Inc., $1,189,716.00
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Gordon N. Ball, Inc., $1,252,837.00
This is a federally funded project subject to the County’s Disadvantaged Business Enterprise (DBE)Program’s
goals and requirements,which are mandated by federal law.The Public Works Director has determined that the
lowest monetary bidder,Valentine Corporation,submitted a non-responsive bid by failing to meet the 20%
DBE goal for this project,achieving 12.25%DBE participation,and failing to submit adequate good faith effort
documentation to comply with the DBE requirements.The Public Works Director recommends rejection of the
bid submitted by Valentine.
The second bidder listed above,American Civil Constructors,submitted the lowest responsive and responsible
bid,which is $99,716.00 less than the next lowest bid,and exceeded the DBE goal,achieving DBE
participation of 21.06%.
On November 6,2024 Valentine,the lowest monetary bidder,was notified in writing of the Public Works
Director’s determination of non-compliance with the DBE Program requirements (see Attachment A).On
November 12,2024 Valentine appealed the Public Works Director’s determination.On December 11,2024,an
administrative hearing was held by a three-person panel (Public Works Director and two upper managers)to
consider Valentine’s appeal and to review/reconsider the determination that Valentine had failed to document an
adequate good faith effort to comply with the DBE goal and requirements for this project.On December 18,
2024,after thorough review,including consideration of the DBE participation achieved by other bidders
(American Civil Constructors and Kerex ,21.06%and 48.33%),the panel issued a written decision denying
Valentine’s appeal and upholding the determination that Valentine’s bid was non-responsive for failure to meet
the DBE goal or to submit adequate good faith effort documentation (see Attachment B).
The Public Works Director reports that American Civil Constructors submitted the lowest responsive and
responsible bid,which is $99,716.00 less than the next lowest bid,and exceeded the DBE goal for this project,
achieving DBE participation of 21.06%,and recommends that the construction contract be awarded to
American Civil Constructors; and this Board concurs and so finds.
The Board of Supervisors previously determined that the project is exempt from the California Environmental
Quality Act (CEQA)as a Class 15301(c)Categorical Exemption,and a Notice of Exemption was filed with the
County Clerk on July 31, 2020.
The general prevailing rates of wages,which shall be the minimum rates paid on this project,have been filed
with the Clerk of the Board, and copies will be made available to any party upon request.
CONSEQUENCE OF NEGATIVE ACTION:
Construction of this project would be delayed, and the project might not be built.
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Contra Costa County
Public Works
Department
Warren La i. Director
Deputy Directors
Stephen Kowalewski, Chief
Allison Knapp
Sarah Price
Carrie Ricci
Joe Yee
December 18, 2024
Via Email [bvalentine@valentinecorp.com] and U.S. Mail
Valentine Corporation
Attn: Robert 0. Valentine, P.E., President
111 Pelican Way
San Rafael, CA 94901
RE: Decision on Your Firm's Appeal and DBE Reconsideration Hearing -
Pleasant Hill Rd. Bridge over Taylor Blvd. Preventive Maintenance Project
Project No.: (Fed Aid No. BRLS-5928(154))
The County appreciates your attendance at the hearing on your firm's appeal and the DBE
Reconsideration Hearing for the subject project, which was held on December 11, 2024 before a
Hearing Panel consisting of the Public Works Director and two upper managers (Warren Lai, Joe Yee,
and Jeff Acuff). ,
After further, thorough review of your firm's Good Faith Effort (GFE) and all documentation and
argument presented by your firm, it is the Hearing Panel's determination that your firm failed to
demonstrate an adequate GFE, as required in the project specs and the federal regulations for this
project (see Notice to Bidders and Special Provisions, Sect. 2-1.12B; 49 CFR Part 26, Appendix A).
Specifically, your firm's bid and GFE documentation had the following deficiencies:
(1) The documentation submitted by your firm shows that your first outreach to DBE firms was
on October 14, 2024,-8 days before bid opening, rather than the 10 days required by Sect.
2-1.12B. This was a major failure because late outreach like this provided inadequate notice
to DBEs and deprived them of an adequate opportunity to evaluate interest in the project, to
prepare bids/quotes, and to negotiate bid prices.
(2) Your firm failed to submit a summary sheet, organized by work areas/materials, listing all
bids/quotes received by your firm and the reason(s) for acceptance or non-acceptance of those
bids/quotes.
(3) Your firm failed to submit a copy of all bids/quotes received by your firm.
( 4) Your firm failed to provide an adequate explanation or justification for rejection of the
bids/quotes from QA Constructors and CMC Traffic Control Specialists.
(5) Your firm failed to provide documentation of negotiation in good faith with all interested DBEs.
''Accredited by the American Public Works Association"
255 Glacier Drive • Martinez, CA 94553
TEL: (925) 313-2000 • FAX: (925) 313-2333
www.cccpublicworks.org
Valentine Corporation, Robert 0. Valentine
December 18, 2024
Page 2 of 2
(6) Of 115 DBEs listed in the CUPC for the work areas identified by your firm, and of the 230 DBEs
listed in the CUPC for all areas of work involved in the project, your firm contacted only 63
DBEs (late contact) and failed to follow up adequately with almost half of those.
(7) Your firm failed to submit all required GFE documentation within two business days, as
required by the Special Provisions. Caltrans Exhibit 15-H, which was part of the required GFE
documentation, was submitted but it was not properly filled out and was incomplete, as
detailed above.
In addition, the Panel considered the DBE participation attained by the second and third monetary
bidders (21.06% and 48.33%), which showed that the 20% DBE goal for this project was attainable
and could have also been met by your firm with adequate GFE.
As a result, it is the decision of the Panel that:
(1) Your firm's appeal does not have merit and is denied; and
(2) Upon reconsideration, your firm has failed to show that the determination by Public Works
staff was erroneous or should be reversed.
(3) Your firm has failed to show that your firm's GFE was adequate under the project specs and
federal regulations, which required all reasonable and necessary steps to achieve the DBE
goal, as described more fully in 49 CFR Part 26, Appendix A.
ks Director
WL:AH:ss
\ \pw-data\grpdata\design\PROJECTS\Pleasant Hill Road over Taylor Blvd Bridge Rehabilitation -W04086\CONSTRUCTION\1 -Bid\GFE\Hrg
Decision -PH Road-Final.docx
c: J. Yee, Administration
A. Huerta, Design Construction Division
K. Dahl, Design Construction Division
Ximena Castro, Administration
1025 ESCOBAR STREET
MARTINEZ, CA 94553CONTRA COSTA COUNTY
Legislation Details (With Text)
File #: Version:125-385 Name:
Status:Type:Consent Item Passed
File created:In control:1/15/2025 BOARD OF SUPERVISORS
On agenda:Final action:2/4/2025 2/4/2025
Title:AWARD and AUTHORIZE the Public Works Director, or designee, to execute a construction contract
with E. E. Gilbert Construction, Inc., in the amount of $308,995 for the Tara Hills Curb Ramps on
Shawn Drive Project, Tara Hills area. (89% Local Road Funds, 11% Transportation Development Act
Funds)
Attachments:
Action ByDate Action ResultVer.Tally
approvedBOARD OF SUPERVISORS2/4/2025 1 Pass
To:Board of Supervisors
From:Warren Lai, Public Works Director/Chief Engineer
Report Title:Construction Contract for the Tara Hills Curb Ramps on Shawn Drive.
☒Recommendation of the County Administrator ☐ Recommendation of Board Committee
RECOMMENDATIONS:
(1)APPROVE plans,specifications,and design for the Tara Hills Curb Ramps on Shawn Drive Project.
(County Project No. 0662-6R4079) (District I)
(2)DETERMINE that the bid submitted by E.E.Gilbert Construction,Inc.(“E.E.Gilbert”),has complied
with the requirements of the County’s Outreach Program and has exceeded the Mandatory Subcontracting
Minimum for this project,as provided in the project specifications;and FURTHER DETERMINE that E.E.
Gilbert has submitted the lowest responsive and responsible bid for the project.
(3)AWARD the construction contract for the above project to E.E.Gilbert in the listed amount ($308,995.50)
and the unit prices submitted in the bid,and DIRECT that E.E.Gilbert shall present two good and sufficient
surety bonds, as indicated below, and that the Public Works Director, or designee, shall prepare the contract.
(4)ORDER that,after the contractor has signed the contract and returned it,together with the bonds as noted
below and any required certificates of insurance or other required documents,and the Public Works Director
has reviewed and found them to be sufficient,the Public Works Director,or designee,is authorized to sign the
contract for this Board.
(5)ORDER that,in accordance with the project specifications and/or upon signature of the contract by the
Public Works Director,or designee,bid bonds posted by the bidders are to be exonerated and any checks or
CONTRA COSTA COUNTY Printed on 4/7/2025Page 1 of 3
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cash submitted for security shall be returned.
(6)ORDER that,the Public Works Director,or designee,is authorized to sign any escrow agreements prepared
for this project to permit the direct payment of retentions into escrow or the substitution of securities for
moneys withheld by the County to ensure performance under the contract,pursuant to Public Contract Code
Section 22300.
(7)AUTHORIZE the Public Works Director,or designee,to order changes or additions to the work pursuant to
Public Contract Code section 20142.
(8)DELEGATE,pursuant to Public Contract Code Section 4114,to the Public Works Director,or designee,the
Board’s functions under Public Contract Code Sections 4107 and 4110.
(9)DELEGATE,pursuant to Labor Code Section 6705,to the Public Works Director,or to any registered civil
or structural engineer employed by the County,the authority to accept detailed plans showing the design of
shoring,bracing,sloping,or other provisions to be made for worker protection during trench excavation
covered by that section.
(10)DECLARE that,should the award of the contract to E.E.Gilbert be invalidated for any reason,the Board
would not in any event have awarded the contract to any other bidder,but instead would have exercised its
discretion to reject all of the bids received.Nothing in this Board Order shall prevent the Board from re-
awarding the contract to another bidder in cases where the successful bidder establishes a mistake,refuses to
sign the contract,or fails to furnish required bonds or insurance (see Public Contract Code Sections 5100-
5107).
FISCAL IMPACT:
The Project will be funded 89% Local Road Funds, 11% Transportation Development Act.
BACKGROUND:
The above project was previously approved by the Board of Supervisors,plans and specifications were filed
with the Board,and bids were invited by the Public Works Director.On December 17,2024 the Public Works
Department received bids from the following contractors:
BIDDER, TOTAL AMOUNT, BOND AMOUNTS
E. E. Gilbert Construction, Inc.: $308,995.50; Payment: $308,995.50; Performance: $308,995.50
Rapid Services LLC d/b/a Rapid Grading Services.: $320,000.00.00
FJ & I Engineering, Inc.: $320,700.00
A3 Pipeline: $352,844.00
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W R Forde Associates, Inc.: $358,280.00
Zara Construction Inc.: $368,460.00
Sposeto Engineering Inc.: $372,273.00
FBD Vanguard Construction, Inc.: $384,817.00
Kerex Engineering, Inc.: $394,475.00
Globe Engineering Development: $417,965.00
BNO Builders Inc.: $447,716.50
The Design Build Inc.: $500,549.35
The Public Works Director has reported that E.E.Gilbert documented an adequate good faith effort to comply
with the requirements of the County’s Outreach Program and exceeded the Mandatory Subcontracting
Minimum,and the Public Works Director recommends that the construction contract be awarded to E.E.
Gilbert.
The Public Works Director recommends that the bid submitted by E.E.Gilbert is the lowest responsive and
responsible bid, which is $11,004.50 less than the next lowest bid, and this Board concurs and so finds.
The Board of Supervisors previously determined that the project is exempt from the California Environmental
Quality Act (CEQA)as a Class 1(c)Categorical Exemption,pursuant to Section 15301(c)of the CEQA
Guidelines, and a Notice of Exemption was filed with the County Clerk on February 3, 2021.
The general prevailing rates of wages,which shall be the minimum rates paid on this project,have been filed
with the Clerk of the Board, and copies will be made available to any party upon request.
CONSEQUENCE OF NEGATIVE ACTION:
Construction of the project would be delayed, and the project might not be built.
CONTRA COSTA COUNTY Printed on 4/7/2025Page 3 of 3
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1025 ESCOBAR STREET
MARTINEZ, CA 94553CONTRA COSTA COUNTY
Legislation Details (With Text)
File #: Version:1RES 2025-27 Name:
Status:Type:Consent Resolution Passed
File created:In control:1/29/2025 BOARD OF SUPERVISORS
On agenda:Final action:2/4/2025 2/4/2025
Title:ADOPT Resolution No. 2025-27 accepting as complete the contracted work performed by CWS
Construction Group, Inc. for the Miller Wellness Center – Crisis Stabilization Unit Project, as
recommended by the Public Works Director, Martinez area. (No fiscal impact)
Attachments:1. Resolution of Acceptance NOC (1-29-25 DFS edits), 2. Signed Resolution No. 2025-27.pdf
Action ByDate Action ResultVer.Tally
adoptedBOARD OF SUPERVISORS2/4/2025 1 Pass
To:Board of Supervisors
From:Warren Lai, Public Works Director/Chief Engineer
Report Title:Resolution of Acceptance and Notice of Completion for Miller Wellness Center - Crisis
Stabilization Unit, located at 25 Allen Street, Martinez (WH332D)
☒Recommendation of the County Administrator ☐ Recommendation of Board Committee
RECOMMENDATIONS:
ADOPT Resolution accepting as complete the contracted work performed by CWS Construction Group,Inc.
(CWS),a California Corporation,for the Miller Wellness Center -Crisis Stabilization Unit Project,25 Allen
Street, Martinez.
FISCAL IMPACT:
There is no fiscal impact associated with accepting completion of contracted work.
BACKGROUND:
Contra Costa County contracted with CWS to construct tenant improvements for a Crisis Stabilization Unit at
the Miller Wellness Center, a facility at the Contra Costa Regional Medical Center in Martinez.
The initial contract amount was $1,365,000.Mutually agreed change orders,totaling $284,044.37,brought the
construction contract amount to a final sum of $1,649,044.37.
The Miller Wellness Center -Crisis Stabilization Unit Project was substantially complete on November 10,
2023.
All required permit inspections have been completed and approved.Furthermore,the Public Works
Department has reviewed the work and found it to be complete.Therefore,Contra Costa County Public Works
Department recommends that the Board adopt the resolution accepting the contract work as complete.
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File #:RES 2025-27,Version:1
CONSEQUENCE OF NEGATIVE ACTION:
Accepting the contract as complete is standard procedure and allows for proper closeout of the contract.If the
contract is not accepted as complete,the period for filing stop payment notices and bond claims may be
extended and Contra Costa County will incur additional expenses for extended contract administration.
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1025 ESCOBAR STREET
MARTINEZ, CA 94553CONTRA COSTA COUNTY
Legislation Details (With Text)
File #: Version:125-386 Name:
Status:Type:Consent Item Passed
File created:In control:1/29/2025 BOARD OF SUPERVISORS
On agenda:Final action:2/4/2025 2/4/2025
Title:APPROVE and AUTHORIZE the County Administrator, or designee, to sign final Change Order No. 4
with CWS Construction Group, Inc. in the amount of $123,734 to settle all claims from the Miller
Wellness Center – Crisis Stabilization Unit Project, Martinez area. (100% Mental Health Realignment
Funds)
Attachments:1. Settlement Change Order (2025-1-24) Signed.pdf
Action ByDate Action ResultVer.Tally
approvedBOARD OF SUPERVISORS2/4/2025 1 Pass
To:Board of Supervisors
From:Warren Lai, Public Works Director/Chief Engineer
Report Title:Final Settlement for Miller Wellness Center - Crisis Stabilization Unit Project
☒Recommendation of the County Administrator ☐ Recommendation of Board Committee
RECOMMENDATIONS:
APPROVE and AUTHORIZE the Public Works Director,or designee,to sign final Change Order No.4 with
CWS Construction Group,Inc.(CWS)in the amount of $123,734.49 to settle all claims from the Miller
Wellness Center - Crisis Stabilization Unit Project.
FISCAL IMPACT:
Funds of $123,734.49 for the proposed settlement amount will come from Mental Health Realignment funds
from the Health Services Department.
BACKGROUND:
The Miller Wellness Center -Crisis Stabilization Unit Project was substantially complete on November 10,
2023.The initial contract amount was $1,365,000.Mutually agreed change orders during construction,
totaling $160,309.87,raised the construction contract amount to a sum of $1,525,309.87.During the project
and after its substantial completion,CWS filed construction claims totaling $867,335.These claims consisted
of a variety of issues,including delays allegedly caused by the County,differing site conditions and defective
plans/specifications, extra work ordered by the County, unpaid retention, interest, and attorney’s fees.
In a nonbinding mediation held on January 22,2025,the County and CWS tentatively accepted $123,734.49 as
settlement of all claims and disputes,subject to approval by this Board and the execution of a final change
order.
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CONSEQUENCE OF NEGATIVE ACTION:
Not approving the settlement will expose the County to potential litigation and all the costs and risk associated
with an unknown outcome and could cost the County well in excess of the tentative settlement amount.
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File: 250-2109
October 25, 2022
WH332D
TO:CWS Construction Group, Inc.
1301 Grant Avenue, Suite B
Novato, CA 94945
ADJUSTMENT IN COMPENSATION AT AGREED LUMP SUM PRICE:
$123,734.49
Contract Summary:
1,365,000.00$
160,309.87$
1,525,309.87$
123,734.49$
1,649,044.36$
Effective Date: January 22, 2025
Compensate the Contractor for settlement of all claims relating to alleged delays, disruption, acceleration,
extra expenses, extended overhead, interest, and other impacts on the above project, including without
limitation:
Global Settlement
For settlement of the above claims, the Contractor shall receive and accept an agreed lump sum of
$123,734.49 and a time extension of 77 calendar days. This sum and time extension constitute full and
complete compensation for providing all labor, material, equipment, tools, and incidentals, including all
markups and overhead by reason of this change. By signature below, the Contractor agrees to accept the lump
sum and time extension as full compensation for all direct and indirect costs for the Change Order work and
as full compensation for any effects the change may have on the project in its entirety and/or on time required
to complete the project.
This Change Order is intended to constitute a global settlement of all claims and issues on this project
that have occurred, that have been mentioned in the project records or correspondence, or that could
be asserted by Contractor at any time (“Released Claims”), including without limitation all indirect,
cumulative, or impact costs arising from or related to the Released Claims. In consideration of payment
of the agreed lump sum amount and time extension as specified in this Change Order, the Contractor,
on behalf of itself, its bonding company(ies), subcontractors, and suppliers, agrees to release and
forever discharge the County, its officers, agents, employees, architects, consultants, and attorneys
from any and all claims, actions, liability, or damages arising from or related to the Released Claims.
Nothing in this Change Order shall constitute an admission of liability on the part of County or an
admission or implication of the validity of Contractor's claims.
As a further part of the global settlement:
(a) The County will pay to the Contractor retention in the amount of $76,265.51 in accordance with Section
8(c) of the Construction Agreement dated October 25, 2022; and
(b) The Contractor will dismiss with prejudice the Complaint filed in Contra Costa Superior Court (Case No.
C24-02108) no later than five days after receiving of the settlement and retention payments from the County,
with all parties bearing their own costs and attorney's fees.
The Original Contract Sum was
All items described in Contractor's COR 24 dated 4/21/2023.
All items described in Contractor's COR 53 dated 11/6/2023.
All items described in the RFIs and other documents referred
to in the above CORs.
Item 4-01:
Item 4-02:
Item 4-03:
CHANGE ORDER NO. 4
Contract for
Construction of:
You are hereby directed to make the following changes in this Contract:
Effective Date of
Contract:
Authorization
MILLER WELLNESS CENTER, CRISIS STABILIZATION UNIT, 25 ALLEN
STREET, MARTINEZ, CA
CONTRA COSTA COUNTY
PUBLIC WORKS DEPARTMENT
255 GLACIER DRIVE
MARTINEZ, CALIFORNIA 94553-4825
Net Change by previously approved Change Orders
The Contract Sum before this Change Order was
Contract Sum will be INCREASED by this Change Order
The new Contract Sum, including this Change Order will be
(925) 313-2000 FAX (925) 313-2101
________
Jeffrey K. Acuff Date
Capital Projects Management Division
Division Manager
________By______________________________________
Contra Costa County Date Date
Warren Lai
Public Works Director
Name: Charlie Slack
Title:
CONTRACTOR:
CWS Construction Group, Inc.
The Completion Time will be increased by this Change Order by 77 calendar days from August 25,
2023 to November 10, 2023, the date on which the Contractor completed the work on the project.
Not valid until signed by both the County and the Contractor.By signature below,Contractor indicates
acceptance of price stated herein as full compensation for all direct and indirect costs for all work described
above,and as full compensation for any effects this change may have on the project in its entirety,on the time
required to complete the project, and/or on the cost to Contractor of completing the project.
RECOMMENDED BY:
COUNTY:
By______________________________
1025 ESCOBAR STREET
MARTINEZ, CA 94553CONTRA COSTA COUNTY
Legislation Details (With Text)
File #: Version:125-387 Name:
Status:Type:Consent Item Passed
File created:In control:1/23/2025 BOARD OF SUPERVISORS
On agenda:Final action:2/4/2025 2/4/2025
Title:RECEIVE report concerning the final settlement of James Steward vs. Contra Costa County; and
AUTHORIZE payment from the Workers' Compensation Internal Service Fund in an amount not to
exceed $75,000 as recommended by the Director of Risk Management. (100% Workers'
Compensation Internal Service Fund)
Attachments:
Action ByDate Action ResultVer.Tally
approvedBOARD OF SUPERVISORS2/4/2025 1 Pass
To:Board of Supervisors
From:Karen Caoile, Director of Risk Management
Report Title:Final Settlement of Claim, James Steward vs. Contra Costa County
☒Recommendation of the County Administrator ☐ Recommendation of Board Committee
RECOMMENDATIONS:
RECEIVE this report concerning the final settlement of James Steward and AUTHORIZE payment from the
Workers' Compensation Internal Service Fund in an amount not to exceed $75,000.
FISCAL IMPACT:
Workers' Compensation Internal Service Fund payment of $75,000.
BACKGROUND:
Attorney Mark A. Cartier, defense counsel for the County, has advised the County Administrator that within
authorization an agreement has been reached settling the workers' compensation claim of James Steward v.
Contra Costa County. The Board's January 21, 2025, closed session vote was: Supervisors Gioia, Andersen,
Burgis, Carlson and Scales-Preston - Yes. This action is taken so that the terms of this final settlement and the
earlier January 21, 2025, closed session vote of this Board authorizing its negotiated settlement are known
publicly.
CONSEQUENCE OF NEGATIVE ACTION:
Case will not be settled.
CONTRA COSTA COUNTY Printed on 4/7/2025Page 1 of 2
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1025 ESCOBAR STREET
MARTINEZ, CA 94553CONTRA COSTA COUNTY
Legislation Details (With Text)
File #: Version:125-388 Name:
Status:Type:Consent Item Passed
File created:In control:1/28/2025 BOARD OF SUPERVISORS
On agenda:Final action:2/4/2025 2/4/2025
Title:DENY claims filed by Ricteisha Citizen; John Doe (A.B.); Gamaliel Elizalde; James Hamner; Linnette
Kidd; Kenneth Lightfoot; Vinod Madhara; Pacific Gas and Electric Co.; Alejandro Plascencia; Subro
Claims Inc. obo Geico Ins. aso Fardeen Ahmed Syed; Joseph Sullivan; and The Estate of Linda
Wooldridge by & through Linnette Kidd.
Attachments:
Action ByDate Action ResultVer.Tally
approvedBOARD OF SUPERVISORS2/4/2025 1 Pass
To:Board of Supervisors
From:Monica Nino, County Administrator
Report Title:Claims
☒Recommendation of the County Administrator ☐ Recommendation of Board Committee
RECOMMENDATIONS:
DENY claims filed by Ricteisha Citizen; John Doe (A.B.); Gamaliel Elizalde; James Hamner; Linnette Kidd;
Kenneth Lightfoot; Vinod Madhara; Pacific Gas and Electric Co.; Alejandro Plascencia; Subro Claims Inc. obo
Geico Ins. aso Fardeen Ahmed Syed; Joseph Sullivan; and The Estate of Linda Wooldridge by & through
Linnette Kidd.
FISCAL IMPACT:
No fiscal impact.
BACKGROUND:
Ricteisha Citizen: Property claim for lost money & a lottery ticket in the amount of $290.
John Doe (A.B.): Elder abuse claim for misconduct in the library in an amount to exceed $25,000.
Gamaliel Elizalde: Property claim for lost education credits at Martinez Detention Facility in the amount of
$750,000.
James Hamner: Property claim for missing food items in the amount of $18.70.
Linnette Kidd: wrongful death claim related to dangerous condition in an amount to be determined.
Kenneth Lightfoot: Property claim for missing food items in the amount of $19.15.
Vinod Madhara: Property claim for missing smart watch in the amount of $350.
Pacific Gas and Electric Company: Property claim for damage to gas line in the amount of $3,725.79.
Alejandro Plascencia: Property claim for damage to vehicle in the amount of $3,641.25.
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File #:25-388,Version:1
Subro Claims Inc. on behalf of Geico Ins. aso Fardeen Ahmed Syed: Property claim for damage to vehicle in
the amount of $42,553.40.
Joseph Sullivan: Property claim for missing property in the amount of $29.
The Estate of Linda Wooldridge by & through Linnette Kidd: Wrongful death claim related to dangerous condition in an
amount to be determined.
CONSEQUENCE OF NEGATIVE ACTION:
Not acting on the claims could extend the claimants’ time limits to file actions against the County.
CONTRA COSTA COUNTY Printed on 4/7/2025Page 2 of 2
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1025 ESCOBAR STREET
MARTINEZ, CA 94553CONTRA COSTA COUNTY
Legislation Details (With Text)
File #: Version:125-389 Name:
Status:Type:Consent Item Passed
File created:In control:1/28/2025 BOARD OF SUPERVISORS
On agenda:Final action:2/4/2025 2/4/2025
Title:Acting as the governing board of the Contra Costa County Fire Protection District, DENY claim filed
by Adan Alberto Granados.
Attachments:
Action ByDate Action ResultVer.Tally
approvedBOARD OF SUPERVISORS2/4/2025 1 Pass
To:Board of Supervisors
From:Lewis Broschard, Chief, Contra Costa County Fire Protection District
Report Title:Claims
☒Recommendation of the County Administrator ☐ Recommendation of Board Committee
RECOMMENDATIONS:
Acting as the governing board of the Contra Costa County Fire Protection District, DENY claim filed by Adan
Alberto Granados.
FISCAL IMPACT:
No fiscal impact.
BACKGROUND:
Adan Alberto Granados: Personal injury claim related to vehicle accident in an amount to exceed $100,000.
CONSEQUENCE OF NEGATIVE ACTION:
Not acting on the claims could extend the claimants’ time limits to file actions against the County.
CONTRA COSTA COUNTY Printed on 4/7/2025Page 1 of 1
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1025 ESCOBAR STREET
MARTINEZ, CA 94553CONTRA COSTA COUNTY
Legislation Details (With Text)
File #: Version:125-400 Name:
Status:Type:Consent Item Passed
File created:In control:1/22/2025 BOARD OF SUPERVISORS
On agenda:Final action:2/4/2025 2/4/2025
Title:APPROVE and AUTHORIZE the Purchasing Agent to execute, on behalf of the Sheriff-Coroner, a
purchase order with Magnet Forensics, LLC, in an amount not to exceed $57,110 for the use of the
GrayKey software for digital forensic evidence processes of criminal cases, for the period March 15,
2025 through March 14, 2026. (100% General Fund)
Attachments:
Action ByDate Action ResultVer.Tally
approvedBOARD OF SUPERVISORS2/4/2025 1 Pass
To:Board of Supervisors
From:David O. Livingston, Sheriff-Coroner
Report Title:Magnet Forensics, LLC
☒Recommendation of the County Administrator ☐ Recommendation of Board Committee
RECOMMENDATIONS:
APPROVE and AUTHORIZE the Purchasing Agent, or designee, to execute on behalf of the Sheriff-Coroner, a
purchase order with Magnet Forensics, LLC, for the use of the GrayKey software in the Office of the Sheriff
Investigation Division that processes digital forensic evidence of time sensitive criminal cases, in an amount
not to exceed $57,110, for the period March 15, 2025 through March 14, 2026.
FISCAL IMPACT:
Approval of this request will result in up to $57,110 in contractual service expenditures over a 1-year period
and will be funded 100% by the General Fund.
BACKGROUND:
Magnet Forensics, LLC, a technology company, plays a crucial role in law enforcement operations. Their
software suite enables detectives to conduct more comprehensive and detailed data extraction from mobile
devices. Magnet Forensics software provides detectives at the Office of the Sheriff Investigation Division with
a tool to access and extract encrypted or inaccessible data from mobile devices, which may have evidentiary
value. It also provides a more efficient process and reduces the number of personnel hours required to complete
a similar task. The ability to conduct data extraction in-house simplifies the chain of custody associated with
the device. The increased efficiency helps the detectives gain real-time information associated with their cases.
The End User License Agreement includes limitation of liability and indemnification from the County to
Magnet Forensics, LLC.
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File #:25-400,Version:1
CONSEQUENCE OF NEGATIVE ACTION:
If the Board does not approve, the detectives at the Office of the Sheriff Investigations Division may not be
able to access encrypted or inaccessible data stored within mobile devices and may be required to request
assistance from a limited number of outside agencies that have access to software capable of performing these
tasks. This would impede efficiency and create a backlog of evidence being retained for processing.
CONTRA COSTA COUNTY Printed on 4/7/2025Page 2 of 2
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1025 ESCOBAR STREET
MARTINEZ, CA 94553CONTRA COSTA COUNTY
Legislation Details (With Text)
File #: Version:125-401 Name:
Status:Type:Consent Item Passed
File created:In control:1/23/2025 BOARD OF SUPERVISORS
On agenda:Final action:2/4/2025 2/4/2025
Title:APPROVE and AUTHORIZE the Purchasing Agent to execute, on behalf of the Office of the Sheriff, a
purchase order with SPACEWORX, in an amount not to exceed $10,000 for a Duramate modular
communication booth, for the period November 1, 2024 through October 31, 2025. (100% General
Fund)
Attachments:
Action ByDate Action ResultVer.Tally
approvedBOARD OF SUPERVISORS2/4/2025 1 Pass
To:Board of Supervisors
From:David O. Livingston, Sheriff-Coroner
Report Title:SPACEWORX
☒Recommendation of the County Administrator ☐ Recommendation of Board Committee
RECOMMENDATIONS:
RESCIND prior Board action (24-3472) from October 22, 2024, which approved and authorized the Purchasing
Agent to execute, on behalf of the Office of the Sheriff, a purchase order with SPACEWORX, in an amount not
to exceed $9,009, for a Duramate modular communication booth, for the period November 1, 2024 through
October 31, 2025; and
APPROVE and AUTHORIZE the Purchasing Agent to execute, on behalf of the Office of the Sheriff, a
purchase order with SPACEWORX, in an amount not to exceed $10,000, for a Duramate modular
communication booth, for the period November 1, 2024 through October 31, 2025.
FISCAL IMPACT:
Approval of this request will result in up to $10,000 in contractual service expenditures and will be funded
100% by the General Fund.
BACKGROUND:
SPACEWORX is an industry leader in building correctional facility specific privacy booths that allow for
purposeful and confidential communication for inmates. This allows inmates to have virtual legal counsel visits
and Telehealth appointments for medical and mental health consults, while ensuring confidentiality and
enhanced safety of inmates, staff and the facility.
By obtaining a Duramate modular communication booth for the Marsh Creek Detention Facility, inmates will
CONTRA COSTA COUNTY Printed on 4/7/2025Page 1 of 2
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File #:25-401,Version:1
not have to be transported to other facilities for needed and required mental health care appointments.
Additionally, due to its remote location, the difficulty for legal counsel to drive to see a client will no longer be
an issue with the ability to conduct virtual legal appointments and counsel with complete confidentiality.
This privacy booth is a collaboration between county departments. Both Detention Health and the Public
Defender’s Office have given their support to assist the Sheriff’s Office in alleviating geographical and staffing
issues by providing inmates with virtual and confidential appointments.
This agreement includes a limitation of liability and indemnification from the County to SPACEWORX.
This Board request is to correct the prior action to reflect the correct contract payment limit.
CONSEQUENCE OF NEGATIVE ACTION:
If the Board does not approve, the Office of the Sheriff will lose the ability to provide needed remote mental
health access and appointments to the population of incarcerated people housed at the Marsh Creek Detention
Facility. This will greatly impact their health and safety as they will not have direct access to a mental health
professional when needed. Additionally, private and confidential conversations between inmates and attorneys
via remote capability will be non-existent.
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1025 ESCOBAR STREET
MARTINEZ, CA 94553CONTRA COSTA COUNTY
Legislation Details (With Text)
File #: Version:125-402 Name:
Status:Type:Consent Item Passed
File created:In control:1/23/2025 BOARD OF SUPERVISORS
On agenda:Final action:2/4/2025 2/4/2025
Title:APPROVE and AUTHORIZE the Purchasing Agent to execute, on behalf of the Sheriff-Coroner, a
purchase order amendment with R-Computer, to increase the payment limit by $450,000 to a new
payment limit not to exceed $900,000 for the purchase of computer hardware, peripherals, cameras,
GPS units, and other computer-related equipment and supplies, and to extend the term end date to
June 30, 2027. (100% General Fund)
Attachments:
Action ByDate Action ResultVer.Tally
approvedBOARD OF SUPERVISORS2/4/2025 1 Pass
To:Board of Supervisors
From:David O. Livingston, Sheriff-Coroner
Report Title:R-Computer purchase order amendment
☒Recommendation of the County Administrator ☐ Recommendation of Board Committee
RECOMMENDATIONS:
APPROVE and AUTHORIZE the Purchasing Agent to execute, on behalf of the Sheriff-Coroner, an
amendment to purchase order #F025858, with R-Computer to increase the payment limit amount by $450,000
to a new total payment limit not to exceed $900,000 to provide computer hardware, peripherals, cameras, GPS
units and other computer-related equipment and supplies, and to extend the term end date from June 30, 2025 to
June 30, 2027.
FISCAL IMPACT:
Approval of this request will result in up to $450,000 in expenditures in a 2-year period and will be funded
100% by the General Fund.
BACKGROUND:
With years of experience with the Office of the Sheriff’s unique, public safety-related information technology
(IT), network and mobile data needs, R-Computer consistently supplies the Office of the Sheriff with the
needed computers, electronic equipment and peripherals in a timely manner. R-Computer works with the Office
of the Sheriff IT Division to ensure that the department receives the best product for the best price to match the
department’s needs. R-Computer provides advice and guidance about products and knows the network structure
and the IT needs of the Office of the Sheriff. R-Computer is reliable, dependable, and competitively priced.
CONSEQUENCE OF NEGATIVE ACTION:
CONTRA COSTA COUNTY Printed on 4/7/2025Page 1 of 2
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File #:25-402,Version:1
If the Board does not approve, the Office of the Sheriff would not be able to purchase desktops, laptops,
monitors and other small computer equipment without requesting for individual purchase orders for each item,
which could lead to a delay in the processing of orders, paying higher prices and potentially longer wait times
for delivery of items.
CONTRA COSTA COUNTY Printed on 4/7/2025Page 2 of 2
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1025 ESCOBAR STREET
MARTINEZ, CA 94553CONTRA COSTA COUNTY
Legislation Details (With Text)
File #: Version:125-403 Name:
Status:Type:Consent Item Passed
File created:In control:1/23/2025 BOARD OF SUPERVISORS
On agenda:Final action:2/4/2025 2/4/2025
Title:APPROVE and AUTHORIZE the Purchasing Agent to execute, on behalf of the Sheriff-Coroner, a
purchase order amendment with Caltronics Business Systems, to increase the amount by $201,000 to
a new total not to exceed $400,000, to provide managed print services and multi-function device
leases for the Office of the Sheriff, and to extend the term end date to June 30, 2027. (100% General
Fund)
Attachments:
Action ByDate Action ResultVer.Tally
approvedBOARD OF SUPERVISORS2/4/2025 1 Pass
To:Board of Supervisors
From:David O. Livingston, Sheriff-Coroner
Report Title:Caltronics Business Systems
☒Recommendation of the County Administrator ☐ Recommendation of Board Committee
RECOMMENDATIONS:
APPROVE and AUTHORIZE the Purchasing Agent to execute, on behalf of the Sheriff-Coroner, an
amendment to purchase order #F023686 with Caltronics Business Systems, to increase the amount by $201,000
to a new payment limit not to exceed $400,000, to provide Managed Print Services (MPS) and Multi-Function
Device (MFD) leases for the Office of the Sheriff, and to extend the term end date from December 31, 2024, to
June 30, 2027.
FISCAL IMPACT:
Approval of this request will result in up to $201,000 in expenditures and will be funded 100% by the General
Fund.
BACKGROUND:
Caltronics Business Systems has provided office technology and print solutions to California since 1975.
Caltronics has partnered with the Office of the Sheriff and several other departments in the county to provide
our Managed Print Services (MPS) and Multi-Function Device (MFD) lease for many years. In addition to
purchasing printers, the MPS provides toner replacement, parts and supplies, and maintenance and service of
the print fleet. Caltronics is reliable, dependable and competitively priced.
CONSEQUENCE OF NEGATIVE ACTION:
If the Board does not approve, the Office of the Sheriff would not be able to continue with the Managed Print
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File #:25-403,Version:1
Services, which would result in greater ongoing costs for toner, parts, and repairs. All of the deployed devices
would also no longer be centrally managed, making it more difficult to identify, address and troubleshoot issues
with devices should they arrive.
CONTRA COSTA COUNTY Printed on 4/7/2025Page 2 of 2
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1025 ESCOBAR STREET
MARTINEZ, CA 94553CONTRA COSTA COUNTY
Legislation Details (With Text)
File #: Version:125-409 Name:
Status:Type:Consent Item Passed
File created:In control:1/22/2025 BOARD OF SUPERVISORS
On agenda:Final action:2/4/2025 2/4/2025
Title:APPROVE Budget Amendment No. BDA-25-00009, authorizing new revenue in the amount of
$180,000 from County Law Enforcement Capital Projects (0131) and appropriating it to Sheriff Marine
Patrol (2507) for the repair of the Sheriff's Office STARR I Helicopter turbine. (100% Co Law Enf Cap
Project)
Attachments:1. BDA-25-00009.pdf
Action ByDate Action ResultVer.Tally
approvedBOARD OF SUPERVISORS2/4/2025 1 Pass
To:Board of Supervisors
From:David O. Livingston, Sheriff-Coroner
Report Title:Budget Amendment for Repair of STARR I Helicopter Turbine
☒Recommendation of the County Administrator ☐ Recommendation of Board Committee
RECOMMENDATIONS:
APPROVE Budget Amendment No. BDA-25-00009, authorizing new revenue in the amount of $180,000 from
Fund 105600 (CO Law Enf Cap Proj) Org 0131 and appropriating it to SO Marine Patrol 100300 (GF) Org
2507 for the repair of the SO STARR I Helicopter turbine.
FISCAL IMPACT:
This action increases revenues and appropriations by $180,000 and is funded 100% by Fund 105600 (Co Law
Enf Cap Project).
BACKGROUND:
The mission of the Air Support Unit (ASU) is to enhance the ability of Sheriff's Patrol and Marine Patrol
deputies to protect the lives and property of the community. This mission is accomplished by preventing and
detecting crime, providing aerial support to locate and assist in the apprehension of wanted persons,
infrastructure protection, and conducting search and rescue missions on land and water. Most importantly, these
missions are always conducted safely, efficiently, and effectively.
The Air Support Unit fleet currently consists of two rotary-wing aircraft:
·STARR I, a 1996 Bell 407 helicopter
·STARR III, a 2014 Bell 407GX helicopter
Each Office of the Sheriff’s helicopter has mandatory maintenance approximately every 2,500 flight hours.
This maintenance is completed prior to the actual 2,500 flight hour mark.The ASU’s current operational flight
plan is to fly approximately 3 hours a shift, totaling 12 hours a week, 48 hours a month.
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File #:25-409,Version:1
The Office of the Sheriff’s helicopter, STARR I, needs a turbine repair. The turbine repair was unpredicted in
the scheduling of services for the helicopter and not accounted for in the Air Support Budget.
Without repair,STARR I is not operational,which limits the overall mission of the Air Support Unit.Although
STARR III is operational,there are scheduled maintenances which will require STARR III to be out of service.
Both helicopters out of service,may pose an impact on the community,the Office of the Sheriff,and local law
enforcement agencies, and the rescue of people in distress is unattainable.
CONSEQUENCE OF NEGATIVE ACTION:
Without this repair, STARR1 will not be functional which will affect public safety and support negatively.
CONTRA COSTA COUNTY Printed on 4/7/2025Page 2 of 2
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View Budget Amendment: Budget
Amendment: FY 2024-25 - Operating Budget
on 01/23/2025 : BDA-25-00009
09:06 AM
01/27/2025
Page 1 of 2
Company Contra Costa County
Budget Template Operating Budget : FY 2024-25 Operating Budget
Budget FY 2024-25 Operating Budget
Organizing Dimension Type
Amendment ID BDA-25-00009
Amendment Date 01/23/2025
Description To transfer funds for repair of SO STARR I from Fund 105600 Org 0131 to Fund 100300 Org 2507
Amendment Type Appropriation / Estimated Revenue Adjustment
Balanced Amendment Yes
Entry Type Mid-Year Adjustments
Status In Progress
Budget Amendment Entries
Period *Ledger Account/Summary Home Organization *Cost
Center *Fund Debit Amount Credit Amount Memo Exceptions
FY 2024-25 Year
(FY 2024-25
Operating Budget)
5016:TRANSFERS - GOV/GOV 2500 SHERIFF
CENTRAL ADMIN
(Home Org)
0131 CO
LAW ENF
HLCPTR
CAP-PRJ
105600
CO LAW
ENF CAP
PROJ
$180,000.00 $0.00 to repair STARR I
turbine
Warning : - Home
Org on Budget
Line Not Equal
Initiator's Home
Org
FY 2024-25 Year
(FY 2024-25
Operating Budget)
5011:REIMBURSEMENTS-GOV/GOV 2500 SHERIFF
CENTRAL ADMIN
(Home Org)
0131 CO
LAW ENF
HLCPTR
CAP-PRJ
105600
CO LAW
ENF CAP
PROJ
$0.00 $180,000.00 to repair STARR I
turbine
Warning : - Home
Org on Budget
Line Not Equal
Initiator's Home
Org
FY 2024-25 Year
(FY 2024-25
Operating Budget)
2310:NON CNTY PROF SPCLZD SVCS 2500 SHERIFF
CENTRAL ADMIN
(Home Org)
2507
SHERIFF
MARINE
PATROL
100300
GENERAL
$180,000.00 $0.00 to repair STARR I
turbine
Warning : - Home
Org on Budget
Line Not Equal
Initiator's Home
Org
FY 2024-25 Year
(FY 2024-25
Operating Budget)
9956:TRANSFERS - GOV/GOVERNMENT 2500 SHERIFF
CENTRAL ADMIN
(Home Org)
2507
SHERIFF
MARINE
PATROL
100300
GENERAL
$0.00 $180,000.00 to appropriate
new revenue to
repair STARR I
turbine
Warning : - Home
Org on Budget
Line Not Equal
Initiator's Home
Org
Process History
Process Step Status Completed On Due Date Person (Up to 5)All Persons Comment
Budget Amendment Event Budget Amendment
Event
Step Completed 01/23/2025 12:40:59
PM
01/24/2025 Heike Anderson 1
View Budget Amendment: Budget
Amendment: FY 2024-25 - Operating Budget
on 01/23/2025 : BDA-25-00009
09:06 AM
01/27/2025
Page 2 of 2
Process Step Status Completed On Due Date Person (Up to 5)All Persons Comment
Budget Amendment Event Review Budget
Amendment
Not Required 01/24/2025 0
Budget Amendment Event Approval by
Department Approver –
Budget Amendment
Approved 01/24/2025 05:35:27
PM
Donn David (Department
Approver – Budget
Amendment)
1
Budget Amendment Event Review Budget
Amendment
Awaiting Action 01/24/2025 Analiza Pinlac (Budget
Specialist (Auditor
Office))
3
Xia Zhang (Budget
Specialist (Auditor
Office))
Yesenia Campos (Budget
Specialist (Auditor
Office))
1025 ESCOBAR STREET
MARTINEZ, CA 94553CONTRA COSTA COUNTY
Legislation Details (With Text)
File #: Version:125-404 Name:
Status:Type:Consent Item Passed
File created:In control:1/16/2025 BOARD OF SUPERVISORS
On agenda:Final action:2/4/2025 2/4/2025
Title:ACCEPT the Office of the Sheriff Inmate Welfare Fund (IWF) report, in accordance with Penal Code
Section 4025(e), on the accounting of all IWF receipts and disbursements for Fiscal Year 2023/2024.
(No fiscal impact)
Attachments:1. IWF Rpt. of Receipts Disbursements etc FY 23-24
Action ByDate Action ResultVer.Tally
approvedBOARD OF SUPERVISORS2/4/2025 1 Pass
To:Board of Supervisors
From:David O. Livingston, Sheriff-Coroner
Report Title:Accept the Fiscal Year 2023-2024 Inmate Welfare Fund Expenditure Report
☒Recommendation of the County Administrator ☐ Recommendation of Board Committee
RECOMMENDATIONS:
ACCEPT the Office of the Sheriff Inmate Welfare Fund (IWF) report, in accordance with Penal Code Section
4025(e), illustrating an accounting of all IWF receipts and disbursements for Fiscal Year 2023/2024.
FISCAL IMPACT:
No fiscal impact.
BACKGROUND:
Penal Code Section 4025(e)states that money and property deposited in the Inmate Welfare Fund shall be
expended by the Office of the Sheriff-Coroner primarily for the benefit,education,and welfare of inmates
confined within the jail.Any funds not needed for the welfare of inmates may be expended for the maintenance
of county jail facilities.Maintenance of county jail facilities may include,but is not limited to,the salary and
benefits of personnel used in the programs to benefit the inmates,education,drug and alcohol treatment,
welfare,library,accounting,and other programs deemed appropriate by the Sheriff.An itemized report of these
expenditures shall be submitted annually to the Board of Supervisors.
This fund received the majority of its revenues from inmate telephone commissions and commissary sales.The
Director of Inmate Services,working with the public members of the Inmate Welfare Committee,manages the
delivery of professional services, establishes an annual budget and oversees expenditures for the Sheriff.
The Inmate Welfare Fund continues to provide valuable professional,educational,and recreational services to
persons in custody at the Martinez Detention Facility,West County Detention Facility,and the Marsh Creek
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File #:25-404,Version:1
Detention Facility.
CONSEQUENCE OF NEGATIVE ACTION:
If unapproved, the County will not be in compliance with Penal Code section 4025(e).
CONTRA COSTA COUNTY Printed on 4/7/2025Page 2 of 2
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Inmate Welfare Fund
Statement of Receipts, Disbursements, and Fund Balance
Fiscal Year Ended June 30, 2024
Receipts:
ViaPath Administrative Allowance $ 81,750
Canteen Commissions 955,935
WCDF Inmate Industries 28,445
WCDF Frame Shop 1,546
Investment Interest 00,00
Total Receipts
$1,067,676
Disbursements:
General Expenditures
BART/Bus Tickets 13,750 (AB-109 Funded)
Telerus (Inmate information line) 15,000(AB-109 Funded)
Entertainment (TV, Board Games, Etc.) 39,022(AB-109 Funded)
AB-109 Sub-Total $67,772
Education and Welfare
Bay Area Chaplains Contractual Services $162,917 (AB-109 Funded)
73
Office of Education Contractual Services 220
975,100 (AB-109 Funded)
Arts In Corrections 6,885 (AB-109 Funded)
Library Program 313,362
Inmate Legal Services 16,508 (AB-109 Funded)
MCDF Landscape Program 31,316
WCDF Frame Shop Program 34,633
WCDF Inmate Industries 152,432
Vocational Supplies 48,924 (AB-109 Funded)
AB-109 Sub-Total $1,210,334
IWF Sub-Total $532,036
Other
Staff Salaries/Benefits $244,404
Staff Travel Expenses 0
Communication 3,855
Office Supplies 733
IWF Sub-Total $ 248,992
Total Disbursements, IWF & AB109
1,278,106 (AB-109)
781,028 (IWF)
$2,059,134
Receipts less Disbursements (IWF Only) $ 286,648
Cash & Investments $ 3,379,073
Total $ 3,665,721
Closing Date 12-31-2024