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HomeMy WebLinkAboutMINUTES - 04272004 - C10 TO: BOARD OF SUPERVISORS FROM: MAURICE M. SHIU, CHIEF ENGINEER DATE: April 27,20004 SUBJECT: ADOPT the previously certified City of Brentwood Final Environmental Impact Report for the Brentwood Hills Country Club (SCH 91013066) for the purpose of issuing flood control permits and conducting real property transactions in compliance with the California Environmental Quality Act, Brentwood area. (District III) Flood Control Permit 640-99. SPECIFIC REQUEST(S)OR RECONIMENDATION(S)&BACKGROUND AND JUSTIFICATION I. Recommended Action- ADOPT tion:ADOPT the previously certified City of Brentwood Final Environmental Impact Report for the Brentwood Hills Country Club for the purpose of issuing flood control permits, and conducting real property transactions associated with construction of the Deer Ridge Country Club project(Brentwood Hills Country Club) in compliance with the California Environmental Quality Act(the custodian of which is the Community Development Director who is located at 651 Pine Street, Martinez); and FIND based upon the evidence outlined in the FEIR that the potentially significant impacts to Land Use, Agricultural Resources, Traffic and Transportation, Cultural Resources, Water Supply, Wastewater Collection, Treatment and Disposal, Solid Waste Hazardous Conditions, Law Enforcement, Fire Protection and Emergency Services, Schools, Parks and Recreation, Energy Supply and Usage, and Aesthetics and Views are within the jurisdiction of and are the responsibility of the City of Brentwood; and not Contra Costa County; and FIND based upon the evidence outlined in the FEIR that potentially significant impacts to Topography, Geology, Soils and Seismic Hazards, Biological Resources, Air Quality,Noise, and Storm Drainage and Flood Control can be adequately mitigated, and S � Continued on Attachment: v SIGNATURE: _.,.RECOMMENDATION OF COUNTY ADMINISTRATOR ' —RECOMMENDATION OF BOARD COMMITTEE _APPROVE —OTHER SIGNATURE(S): ACTION OF BOARD ON APRIL 2T 2504 APPROVED AS RECOMMENDED XX OTHER VOTE OF SUPERVISORS xx UNANIMOUS(ABSENT NONE ) AYES: NOES: ABSENT: ABSTAIN: I hereby certifv that this is a true and correct G:\CrrpData\EngSvc\ENVIRO\BO\2004\(04-20-04)CEQA-Deer Ridge copy of an action taken and entered on the County Club Adopt EIR Revised.doc minutes of the Board of Supervisors on the Orig.Div: Public Works(R/P) date shown.. Contact: Leigh Chavez,Engineering Services cc: P. ev s,FioodControl Ku E.Kuevor,CAO ATTESTED:_ APRIL 27, 2004 Auditor-Controller JOHN SWEETEN,Clerk of the Board of Community Development Supervisors and County Administrator Construction By ,Deputy SUBJECT: ADOPT the previously certified City of Brentwood Final Environmental Impact Report for the Brentwood Hills Country Club (SCH 91013066) for the purpose of issuing flood control permits and conducting real property transactions in compliance with the California Environmental Quality Act, Brentwood area. (District III)Flood Control Permit 640-99. DATE: April 27, 2004 PAGE: 2 FIND that the City of Brentwood has adopted mitigation measures that substantially lessen the significant impacts of the project as identified in the FEIR, and FIND that those potentially significant impacts identified as unavoidable within the FEIR are within the jurisdiction of and are the responsibility of the City of Brentwood; and not Contra Costa County, and FIND that the real property transactions and issuance of flood control permits necessary to accommodate the project will not cause a significant impact; and DIRECT the Director of Community Development to file a Notice of Determination with the County Clerk; and AUTHORIZE the Chief Engineer to arrange for payment of a$25 fee to Community Development Department for processing, and a$25 fee to the County Clerk for filing of the Notice of Determination; II. Financial IMpoet: There will be no financial impact to the Flood Control District. III. Reasons for Recommendations and Rackground: The project developer plans to implement the Deer Ridge Country Club at Dry Creek Reservoir Project. In order to accommodate development of the project site, the Contra Costa County Flood Control and Water Conservation District plans to conduct multiple real property transactions as well as issue multiple flood control permits. The real property transactions will include acceptance of various access easements, right of way land swaps, quitclaiming of original flowage easements, acceptance of replacement flowage easements, granting of roadway and drainage easements, granting of a Private Strom Drain Easement, and other transactions as necessary. The Flood Control Permits issued by the District will authorize some of the developer's actions associated with the project including providing alternate access to the District's Dry Creek Reservoir Facility, construction of roads and associated facilities, construction of publicly and privately maintained drainage systems, construction of headwalls associated with roadway embankments and culverts, and desalting of the District's equalizer channel (desalting of the channel is being required by the California Department of Fish and Game). The City of Brentwood prepared a Final Environmental Impact Report (FEIR) for the project in May of 1992. Contra Costa County Flood Control and Water Conversation District is adopting the FEIR in order to conduct the real property transactions and issue Flood Control Permits necessary to accommodate the project. No significant impacts are expected as a result of the Flood Control District's real property transactions or permit issuance. As a condition of the District's flood control permits, the developer will be required to obtain all necessary regulatory permits and approvals. SUBJECT: ADOPT the previously certified City of Brentwood Final Environmental Impact Report for the Brentwood Hills Country Club (SCH 91013066) for the purpose of issuing flood control permits and conducting real property transactions in compliance with the California Environmental Quality Act,Brentwood area. (District III)Flood Control Permit 640-99, DATE. April 27, 2004 PAGE: 3 IV. Consequences of Negative Action; Delay in adopting the document will result in an inability to conduct the real property transfers and issue flood control permits to the developer. Contra Costa County Flood Control and Water Conservation District Findings for the Deer Ridge Country Club at Dry Creek Reservoir Project (Brentwood Hills Country Club) The project impacts listed below were identified in the A. G. Spans Brentwood Hill Country Club Environmental Impact Report. Staff from the environmental section at Contra Costa Flood Control and Water Conservation District has reviewed the impacts relative to the permits that will be issued and real property transactions that will be conducted in order to accommodate portions of the project. According to CEQA, a responsible agency has responsibility for mitigating or avoiding only the direct or indirect environmental effects of those parts of the project which it decides to carry out, finance, or approve. Further, the responsible agency must make the findings required by Section 15091 (Findings) for each significant effect of the project and must make the findings in Section 15093 (Statement of Overriding Considerations) if necessary. The District's findings regarding potentially significant impacts related to issuance of flood control permits and conducting real property transactions are located at the end of each section below. This analysis only specifically addresses those potentially significant impacts associated with portions of the project the District will authorize. There are a number of potentially significant impacts associated with the larger Deer Ridge Country Club development project; however, those impacts are in the jurisdiction of and are the responsibility of the City of Brentwood as the Lead Agency. The majority of the Deer Ridge Country Club development project has already been implemented(the golf course has been constructed, the homes are under construction, etc.) Following are Contra Costa County Flood Control and Water Conservation District's Findings pursuant to Section 15091 of CEQA regarding potentially significant project impacts associated with the District's issuance of flood control permits and real property transactions for the Deer Ridge Country Club at Dry Creek Reservoir Project: Land Use There are no potentially significant land use impacts associated with the District's issuance of flood control permits or real property transactions. All potentially significant land use impacts associated with the Brentwood Hills Country Club project are the responsibility of the City of Brentwood as the CEQA Lead Agency. AZricultural Resources There are no potentially significant agricultural resource impacts associated with the District's issuance of flood control permits or real property transactions. All potentially significant agricultural resource impacts associated with the Brentwood Hills Country Club project are the responsibility of the City of Brentwood as the CEQA Lead Agency. Topography, Geology, Soils and Seismic Hazards Impact: surface soils are subject to erosion. Mitigation: Graded slopes shall be hydroseeded and landscaped prior to October 15 of the year following rough grading. All slopes on-site shall be maintained in a vegetated state subsequent to project completion. This mitigation measure will be included as a condition of the flood control permit. District Finding: the mitigation measures adopted by the Lead Agency and incorporated into the flood control permit for the project should mitigate any erosion impacts associated with activities authorized by the District's flood control permits to a less than significant level. Biological Resources Impact: potential loss of valley elderberry longhorn beetles. Mitigation: Before the start of construction, any elderberry plants should be clearly identified; barriers shall be erected no less than six feet outside the drip line and remain in place throughout the construction phase. Suitable barriers could be constructed of TENSAR fencing(four feet high) or similar materials. This measure will be included as a condition of the flood control permit. District Finding: the mitigation measures adopted by the Lead Agency and incorporated into the flood control permit for the project should mitigate any impacts to valley elderberry longhorn beetles associated with activities authorized by the District's flood control permits to a less than significant level. Note: the majority of the project site has been fully developed. As a condition of the flood control permits for work within the District's jurisdiction, the permittee will be required to obtain any necessary regulatory permits from the resource agencies. Traffic and Transportation There are no potentially significant traffic or transportation impacts associated with the District's issuance of flood control permits or real property transactions. All potentially significant traffic and transportation impacts associated with the Brentwood Hills Country Club project are the responsibility of the City of Brentwood as the CEQA Lead Agency. Air Quality Impact: Construction equipment and vehicles will generate dust which will result in locally elevated level of PMto. Mitigation: A construction dust control mitigation plan shall be prepared that specifies the methods of dust control that will be utilized, demonstrates the availability of needed equipment and personnel, and identifies a responsible individual who can authorize implementation of additional measures, if needed. This measure will be included as a condition of the flood control permit. District Finding: measures adopted by the Lead Agency and incorporated into the flood control permit for the project should mitigate any air quality impacts resulting from those activities covered by the flood control permits to a less than significant level. Noise Impact: noise from project construction activities would add to the noise environment in the immediate area. Mitigation: a) construction activities shall take place during daylight hours, b) all construction equipment shall be equipped with effective mufflers, c) stationary equipment and vehicle staging areas shall be located as far as possible from noise-sensitive receivers. This measure will be included as a condition of the flood control permit. District Finding: Mitigation measures adopted by the Lead Agency and incorporated into the flood control permit for the project should mitigate any noise impacts resulting from those activities covered by the flood control permits to a less than significant level. Storm Drainage and Flood Control Impact: Potential pollution of surface water by urban storm runoff Mitigation: The proposed project shall obtain an NPDES construction activity permit and should comply with the specific requirements for nonpoint source discharge in compliance with EPA and Regional Water Quality Control Board requirements. This measure will be included as a condition of the flood control permit. District Finding: Mitigation measures adopted by the Lead Agency and incorporated into the flood control permit for the project should mitigate any storm drainage and flood control impacts resulting from those activities covered by the flood control permits to a less than significant level. Water Supply There are no potentially significant water supply impacts associated with the District's issuance of flood control permits or real property transactions. All potentially significant water supply impacts associated with the Brentwood Hills Country Club project are the responsibility of the City of Brentwood as the CEQA Lead Agency. Wastewater Collection, Treatment and Disposal There are no potentially significant wastewater collection, treatment, and disposal impacts associated with the District's issuance of flood control permits or real property transactions. All potentially significant wastewater collection, treatment and disposal impacts associated with the Brentwood Hills Country Club project are the responsibility of the City of Brentwood as the CEQA Lead Agency. Solid Waste There are no potentially significant solid waste impacts associated with the District's issuance of flood control permits or real property transactions. All potentially significant solid waste impacts associated with the Brentwood Hills Country Club project are the responsibility of the City of Brentwood as the CEQA Lead Agency. Hazardous Conditions There are no potentially significant hazardous conditions impacts associated with the District's issuance of flood control permits or real property transactions. All potentially significant hazardous conditions impacts associated with the Brentwood Hills Country Club project are the responsibility of the City of Brentwood as the CEQA Lead Agency. Law Enforcement There are no potentially significant impacts related to law enforcement associated with the District's issuance of flood control permits or real property transactions. All potentially significant law enforcement impacts associated with the Brentwood Hills Country Club project are the responsibility of the City of Brentwood as the CEQA Lead Agency. Fire Protection and Emer2ency Services There are no potentially significant impacts related to fire protection and emergency services associated with the District's issuance of flood control permits or real property transactions. All potentially significant fire protection and emergency services impacts associated with the Brentwood Hills Country Club project are the responsibility of the City of Brentwood as the CEQA Lead Agency. Schools There are no potentially significant impacts related to schools associated with the District's issuance of flood control permits or real property transactions. All potentially significant impacts to schools associated with the Brentwood Hills Country Club project are the responsibility of the City of Brentwood as the CEQA Lead Agency. Parks and Recreation There are no potentially significant impacts related to parks and recreation associated with the District's issuance of flood control permits or real property transactions. All potentially significant impacts to parks and recreation associated with the Brentwood Hills Country Club project are the responsibility of the City of Brentwood as the CEQA Lead Agency. Energy Supply and Usage There are no potentially significant impacts related to energy supply and usage associated with the District's issuance of flood control permits or real property transactions. All potentially significant impacts to energy supply and usage associated with the Brentwood Hills Country Club project are the responsibility of the City of Brentwood as the CEQA Lead Agency. Aesthetics and Views There are no potentially significant impacts related to aesthetics and views associated with the District's issuance of flood control permits or real property transactions. All potentially significant impacts to aesthetics and views associated with the Brentwood Hills Country Club project are the responsibility of the City of Brentwood as the CEQA Lead Agency. Cultural Resources There are no potentially significant impacts related to cultural resources associated with the District's issuance of flood control permits or real property transactions. All potentially significant impacts to cultural resources associated with the Brentwood Hills Country Club project are the responsibility of the City of Brentwood as the CEQA Lead Agency. The Permittee will be issued a Flood Control Permit with Special Provisions by the District. These Special Provisions will be binding on the Permittee. Therefore, no significant impacts associated with the Flood Control District's real property transactions or issuance flood control permits are expected as a result of the Permittee's actions. Since no significant impacts are expected as a result of the District's real property transactions or issuance of flood control permits, there is no need for the District to adopt a Statement of Overriding Considerations. The Permittee will be responsible for obtaining all necessary regulatory permits associated with work authorized by the flood control permits and road encroachment permits. CALIFORNIA ENVIRONMENTAL QUALITY ACT NOTICE OF DETERMINATION CONTRA COSTA COUNTY COMMUNITY DEVELOPMENT DEPARTMENT 651 PINE STREET 4TH FLOOR NORTH WING, MARTINEZ,CALIFORNIA 94553-0095 Telephone: (925)313-2296 Contact Person: Cece 9ellgren, Environmental Planner Common Name (if any), Location, and Project Description: Deer Ridge Country Club at Dry Creek Reservoir Project. The project developer plans to implement the Deer Ridge Country Club at Dry Creek Reservoir Project. In order to accommodate development of the project site, the Contra Costa County Flood Control and Water Conservation District plans to conduct multiple real property transactions as well as issue multiple flood control permits. The real property transactions will include acceptance of various access easements, right of way land swaps, quitclalming of original flowage easements, acceptance of replacement flowage easements, granting of roadway and drainage easements, granting of a Private Strom Drain Easement, and other transactions as necessary. The Flood Control Permits issued by the District will authorize some of the developer's actions associated with the project including providing alternate access to the District's Dry Creek Reservoir Facility, construction of roads and associated facilities,construction of publicly and privately maintained drainage systems, construction of headwalls associated with roadway embankments and culverts, and desilting of the District's equalizer channel (desilting required by the California Department of Fish and Game). The City of Brentwood prepared a Final Environmental Impact Report(FEIR)for the project in May of 1992.Contra Costa County Flood Control and Water Conversation District is adopting the FEIR in order to conduct the real property transactions, issue road encroachment permits, and issue Flood Control Permits necessary to accommodate the project. No significant impacts are expected as a result of the Flood Control District's real property transactions or permit issuance. Asa condition of the District's flood control permits,the developer will be required to obtain all necessary regulatory permits and approvals. Pursuant to the provisions of the California Environmental Quality Act: { } An Environmental Impact Report was prepared and certified (SCH # } (X ) The Project was encompassed by an Environmental Impact Report previously prepared by the City of Brentwood for the Brentwood Hills Country Club (SCH#91013066). { } A Negative Declaration {}was prepared { } Copies of the record of project approval and the final EIR may be examined at the office of the Contra Costa County Public Works Department. (X ) The Project will not have a significant environmental effect with mitigation measures incorporated. ( } The Project will have a significant environmental effect. ( } Mitigation measures were made a condition of approval of the project. { X ) A statement of overriding considerations is not necessary. (X ) Findings pursuant to Section 15091 of the CEQA Guidelines are included in the District's adoption materials. Date: 13y: Community Development Department Representative 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: X County Clerk-$50 Public Works Department Total I7ue: $50 255 Glacier Drive Total Paid $ Martinez,CA 94553 Attn:Cece Sellgren Receipt#: -- ic GAGrpDatmEngSvc�ENVJR0%F1ood ControASuncat(Deer Ridge)SNOD.doc Contra Costa County Flood Control and Water Conservation District Findings for the Veer Ridge Country Club at Dry Creek.Reservoir Project(Brentwood Hills Country Club) The project impacts listed below were identified in the A. G. Spanos Brentwood Hill Country Club Environmental Impact Report. Staff from the environmental section at Contra Costa Flood Control and Water Conservation District has reviewed the impacts relative to the permits that will be issued and real property transactions that will be conducted in order to accommodate portions of the project. According to CEQA, a responsible agency has responsibility for mitigating or avoiding only the direct or indirect environmental effects of those parts ofthe.project which it decides to carry out, finance, or approve. Further, the responsible agency must make the findings required by Section 15091 (Findings) for each significant effect of the project and must make the findings in Section 15093 (Statement of Overriding Considerations) if necessary. The District's findings regarding potentially significant impacts related to issuance of flood control permits and conducting real property transactions are located at the end of each section below. This analysis only specifically addresses those potentially significant impacts associated with portions of the project the District will authorize. There are a number of potentially significant impacts associated with the larger Deer Ridge Country Club development project; however, those impacts are in the jurisdiction of and are the responsibility of the City of Brentwood as the Lead Agency. The majority of the Deer Ridge Country Club development project has already been implemented(the golf course has been constructed, the homes are under construction, etc.) Following are Contra Costa County Flood Control and Water Conservation District's Findings pursuant to Section 15091 of CEQA regarding potentially significant project impacts associated with the District's issuance of flood control permits and real property transactions for the Deer Ridge Country Club at Dry Creek Reservoir Project: Land Use There are no potentially significant land use impacts associated with the District's issuance of flood control permits or real property transactions. All potentially significant land use impacts associated with the Brentwood Hills Country Club project are the responsibility of the City of Brentwood as the CEQA Lead Agency. Agricultural Resources There are no potentially significant agricultural resource impacts associated with the District's issuance of flood control permits or real property transactions. All potentially significant agricultural resource impacts associated with the Brentwood Hills Country Club project are the responsibility of the City of Brentwood as the CEQA Lead Agency. Topog_raphy, Geology. Soils and Seismic Hazards Impact: surface soils are subject to erosion. Mitigation: Graded slopes shall be hydroseeded and landscaped prior to October 15 of the year following rough grading. All slopes on-site shall be maintained in a vegetated state subsequent to project completion. This mitigation measure will be included as a condition of the flood control permit. District Finding: the mitigation measures adopted by the Lead Agency and incorporated into the flood control permit for the project should mitigate any erosion impacts associated with activities authorized by the District's flood control permits to a less than significant level. Biological Resources Impact: potential loss of valley elderberry longhorn beetles. Mitigation: Before the start of construction, any elderberry plants should be clearly identified; barriers shall be erected no less than six feet outside the drip line and remain in place throughout the construction phase. Suitable barriers could be constructed ofTENSAR fencing(four feet high) or similar materials. This measure will be included as a condition of the flood control permit. District Finding: the mitigation measures adopted by the Lead Agency and incorporated into the flood control permit for the project should mitigate any impacts to valley elderberry longhorn beetles associated with activities authorized by the District's flood control permits to a less than significant level. Note: the majority of the project site has been fully developed. As a condition of the flood control permits for work within the District's jurisdiction, the permittee will be required to obtain any necessary regulatory permits from the resource agencies. Traffic and Transportation There are no potentially significant traffic or transportation impacts associated with the District's issuance of flood control permits or real property transactions. All potentially significant traffic and transportation impacts associated with the Brentwood Hills Country Club project are the responsibility of the City of Brentwood as the CEQA Lead Agency. Air Quality Impact: Construction equipment and vehicles will generate dust which will result in locally elevated level ofPM1o. Mitigation: A construction dust control mitigation plan shall be prepared that specifies the methods of dust control that will be utilized, demonstrates the availability of needed equipment and personnel, and identifies a responsible individual who can authorize implementation of additional measures, if needed. This measure will be included as a condition of theflood control permit. District Finding: measures adopted by the Lead Agency and incorporated into the flood control permit for the project should mitigate any air quality impacts resulting from those activities covered by the flood control permits to a less than significant level. Noise Impact: noise from project construction activities would add to the noise environment in the immediate area. Mitigation: a) construction activities shall take place during daylight hours, b) all construction equipment shall be equipped with effective mufflers, c) stationary equipment and vehicle staging areas shall be located as far as possible from noise-sensitive receivers. This measure will be included as a condition of the flood control permit. District Finding: Mitigation measures adopted by the Lead Agency and incorporated into the flood control permit for the project should mitigate any noise impacts resulting from those activities covered by the flood control permits to a less than significant level. Storm Drainne and Flood Control Impact: Potential pollution of surface water by urban storm runoff .Mitigation: The proposed project shall obtain an NPDES construction activity permit and should comply with the specific requirements for nonpoint source discharge in compliance with EPA and Regional Water Quality Control Board requirements. This measure will be included as a condition of the flood control permit. .District Finding: Mitigation measures adopted by the Lead Agency and incorporated into the flood control permit for the project should mitigate any storm drainage and flood control impacts resulting from those activities covered by the flood control permits to a less than significant level. Water Supply There are no potentially significant water supply impacts associated with the District's issuance of flood control permits or real property transactions. All potentially significant water supply impacts associated with the Brentwood Hills Country Club project are the responsibility of the City of Brentwood as the CEQA Lead Agency. Wastewater Collection. Treatment and Disl)osal There are no potentially significant wastewater collection, treatment, and disposal impacts associated with the,District's issuance of flood control permits or real property transactions. All potentially significant wastewater collection, treatment and disposal impacts associated with the Brentwood Hills Country Club project are the responsibility of the City of Brentwood as the CEQA Lead Agency. Solid Waste There are no potentially significant solid waste impacts associated with the District's issuance of flood control permits or real property transactions. All potentially significant solid waste impacts associated with the Brentwood Hills Country Club project are the responsibility of the City of Brentwood as the CEQA Lead Agency. Hazardous Conditions There are no potentially significant hazardous conditions impacts associated with the District's issuance of flood control permits or real property transactions. All potentially significant hazardous conditions impacts associated with the Brentwood Hills Country Club project are the responsibility of the City of Brentwood as the CEQA Lead Agency. Law Enforcement There are no potentially significant impacts related to law enforcement associated with the District's issuance of flood control permits or real property transactions. All potentially significant law enforcement impacts associated with the Brentwood Hills Country Club project are the responsibility of the City of Brentwood as the CEQA Lead Agency. Fire Protection and Emergency Services There are no potentially significant impacts related to fire protection and emergency services associated with the District's issuance of flood control permits or real property transactions. All potentially significant fire protection and emergency services impacts associated with the Brentwood Hills Country Club project are the responsibility of the City of Brentwood as the CEQA Lead Agency. Schools There are no potentially significant impacts related to schools associated with the.District's issuance of flood control permits or real property transactions. All potentially significant impacts to schools associated with the Brentwood Hills Country Club project are the responsibility of the City of Brentwood as the CEQA Lead Agency. Parrs and Recreation There are no potentially significant impacts related to parks and recreation associated with the District's issuance of flood control permits or real property transactions. All potentially significant impacts to parks and recreation associated with the Brentwood Hills Country Club project are the responsibility of the City of Brentwood as the CEQA Lead Agency. Enemy Supply and [Jsae There are no potentially significant impacts related to energy supply and usage associated with the District's issuance of flood control permits or real property transactions. All potentially significant impacts to energy supply and usage associated with the Brentwood Hills Country Club project are the responsibility of the City of Brentwood as the CEQA Lead Agency. Aesthetics and Views There are no potentially significant impacts related to aesthetics and views associated with the District's issuance of flood control permits or real property transactions. All potentially significant impacts to aesthetics and views associated with the Brentwood Hills Country Club project are the responsibility of the City of Brentwood as the CEQA Lead Agency. Cultural Resources There are no potentially significant impacts related to cultural resources associated with the District's issuance of flood control permits or real property transactions. All potentially significant impacts to cultural resources associated with the Brentwood Hills Country Club project are the responsibility of the City of Brentwood as the CEQA Lead Agency. The Permittee will be issued a Flood Control Permit with Special Provisions by the District. These Special Provisions will be binding on the Permittee. Therefore, no significant impacts associated with the Flood Control District's real property transactions or issuance flood control permits are expected as a result of the Perittee's actions. Since no significant impacts are expected as a result of the District's real property transactions or issuance of flood control permits, there is no need for the District to adopt a Statement of Overriding Considerations. The Permittee will be responsible for obtaining all necessary regulatory permits associated with work authorized by the flood control permits and road encroachment permits. CALIFORNIA ENVIRONMENTAL QUALITY ACT NOTICE OF DETERMINATION CONTRA COSTA COUNTY COMMUNITY DEVELOPMENT DEPARTMENT 651 FINE STREET- 4TH FLUOR NORTH WING MARTINEZ,CALIFORNIA 94553-0095 Telephone: (925)313-2296 Contact Person: Cece Sellgren, Environmental Planner Common Name (if any), Location, and Project Description: Deer Ridge Country Club at Dry Creek Reservoir Project. The project developer plans to implement the Deer Ridge Country Club at Dry Creek Reservoir Project. In order to accommodate development of the project site, the Contra Costa County Flood Control and Water Conservation District pians to conduct multiple real property transactions as well as issue multiple flood control permits. The real property transactions will include acceptance of various access easements, right of way land swaps, quitclaiming of original flowage easements, acceptance of replacement flowage easements, granting of roadway and drainage easements, granting of a Private Strom Drain Easement, and other transactions as necessary. The Flood Control Permits issued by the District will authorize some of the developer's actions associated with the project including providing alternate access to the District's Dry Creek Reservoir Facility, construction of roads and associated facilities, construction of publicly and privately maintained drainage systems, construction of headwalls associated with roadway embankments and culverts, and desilting of the District's equalizer channel (desilting required by the California Department of Fish and Game). The City of Brentwood prepared a Final Environmental Impact Report(FEIR)for the project in May of 1992.Contra Costa County Flood Control and Water Conversation District is adopting the FEIR in order to conduct the real property transactions, issue road encroachment permits, and issue Flood Control Permits necessary to accommodate the project. No significant impacts are expected as a result of the Flood Control District's real property transactions or permit issuance. As a condition of the District's flood control permits,the developer will be required to obtain all necessary regulatory permits and approvals. Pursuant to the provisions of the California Environmental Quality Act: { ) An Environmental Impact Report was prepared and certified {SCH # ) (X ) The Project was encompassed by an Environmental Impact Report previously prepared by the City of Brentwood for the Brentwood Hills Country Club (SCH #91013066). ( ) A Negative Declaration ()was prepared ( ) Copies of the record of project approval and the final EIR may be examined at the office of the Contra Costa County Public Works Department. ( X ) The Project will not have a significant environmental effect with mitigation measures incorporated. ( ) The Project will have a significant environmental effect. { } Mitigation measures were made a condition of approval of the project. ( X ) A statement of overriding considerations is not necessary. {X ) Findings pursuant to Section 15091 of the CEQA Guidelines are included in the District's adoption materials. Date: By: Community Development Department Representative AFFIDAVIT OF FILING AND POSTING I declare that on 1 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: X County Clerk-$50 Public works Department Total Due: $50 255 Glacier Drive Total Paid $ Martinez,CA 94553 Attn:Cece Sellgren Receipt#: tc GAGrpDatz%Er,.gSv6ENV1R0T1aod ControllSuncal(Deer Rldge)\NOD.doc Final Environmental Impact Report Brentwood Hills Country Club State Clearinghouse Number 91013066 City of Brentwood EIR File No. 90-2 ' Prepared for: City of Brentwood 708 Third Street Brentwood, California 94513 (510) 634-6905 Prepared by: Michael Paoli and Associates Environmental, School Facility, and City Planning 600 West Shaw Avenue, Suite 240 Fresno, California 93704 In association with: Donald Ballanti Brown-Buntin Associates, Inc. DKS Associates William P. Jordan, Ph.D. and R. James Brown, Ph.D. May 1992 PREFACE - This document, together with the draft EIR dated February 1992, constitute the final environmental impact report for the Brentwood Hills Country Club. The information presented in this document has been provided in accordance with the requirements of the California Environmental Quality Act (CEQA) Guidelines and includes the following: • Section A is the revised summary .for the EIR. • Section B presents a list of the agencies and individuals who received a copy of the draft EIR for review. • Section C contains the comments that were received from agencies and individuals on the draft EIR and the City of Brentwood's responses to the comments. • Section D contains corrections to the draft EIR. i I f Michael Paoli and Associates i SECTION B NOTIFICATION _ The agencies or individuals listed on the following pages were sent copies of the draft EIR for review. 3 S t i t Michael Paoli and Associates B-1 ABAG Plan & Fro. Re.Sect Brentwood Post office CCC Flood & Water Dist. P.Q. Box 2050 760 F€ret Street 255 Glacier Drive Oakland, CA 94504 Brentwood, CA 44513 Martinez, CA 94553 (415) 464.7937 (415) 634.3148-M. Vilchez (415) 846-4473-Bud Murphy County Health Officer East CC Irrigation Dist. Liberty Union High School 20 Allen Street 626 First Street 850 Second Street Martinez, CA 04333 Brentwood, CA 94513 Brentwood, CA 44513 (415) 37"012 Chuck Hemllton (415) 834-3621-Phil White Pacific Geo & Electric Contra Costa Resource Con. Ba Area Air Quality 800 Second Street SSS2 Clayton Road 934 Ellis Street-Maint. Dept, Antioch, CA 945N Concord, CA 94521 San Francisco, CA 94109 (415) 779-7348-Ms. Peterson (41 S) 682.2286 (415) 771.8000-Hsnry Hilten Brentwood Rec. & Park Dist. Brentwood Elem. School Dist. CCC Planning Department 500 Chestnut Street 250 First Street 661 Bine Street Brentwood, CA 94513 Brentwood, CA 94513 Martinez CA 64553 (415) 834-6191-,James Frank (415) 634-1168-William Bristow (415) 37�-2026-H. Bragdon Brentwood Police Department CC Mosquito Abatement Dist. Pacific Bell 500 Chestnut Street 155 Mason Circle 401 Lennon Lane, Room 20( Brentwood, CA 94513 Concord, CA 94520 Walnut Creek, CA 94598 Attention: Chief Frank Charles Beesley (416) 977.2027-Blil Betz Cal-Trans, District 04 Trl-Delta Transit East Diablo Fire District P.Q. Box 7310 801 Wilbur Avenue P.Q. Box 340 S.F., CA 94120.7310 Antioch, CA 94609 Brentwood, CA 84513 Attn. Dors Steiger (415) 754.8622-Anne Drew (415) 634-3400-Paul Hein City of Antioch CC Water District City of Brentwood P.O. Sox 134 1331 Concord Avenue Engineering Dept. Antioch, CA 94509 Concord, CA 94520 (415) 778.3491 Attention. Dennis Plalla LAFCQ Oakley Water District Televants, Inc. 851 Pine Street 227 Main Street 101 Village Drive Martinez, CA 94553 Oakley, CA 94561 Brentwood, CA 94513 (415) 6464000-0.Mons field Attention. Leonard Celonl (415) 634-3583-D.McNay C Rlvsrvlsw Fire District MTC Dept of Fish & Dame 1600 W. Fourth Street 101 8th Street 7328 Silverado Trail Antioch, CA 54549 Oakland, CA 94607 Yountville, CA (415) 757-1303-Ken Lucjdv (41 S) 484.7820-Susan Pultz Y--_•- 7 - Qtals n1A%*rinnhnjl+ew Sr6t1t4VDC}d l�1BWt3 CCC Public Works 1400 10th Street P.O. Box 517 255 Glacier Dr. Room 121 Brentwood, CA 94$13 Martinez CA 9455' Sacramento, CA 95814 Attn: Dave Roberts SECTION C COMMENTS RECEIVED AND RESPONSES TO' _. COMMENTS This section consists of comments received on the draft EIR from the various interested agencies and individuals and the City of Brentwood's responses to the comments. For easy reference, a table of contents with the page numbers for thij section is included below: Comment/Resyonse Paye Contra Costa Resource Conservation District C- 2 Response C- 4 Contra Costa County Flood Control & Water Conservation District C- 5 Response C- 7 Land Planning Consultants, Inc. (February 26, 1992) C- 8 k Response C-10 Brentwood Union School District (March 10, 1992) C-11 Response C-13 Land Planning Consultants, Inc. (March 18, 1992) C-14 Response C-15 Brentwood Union School District (March 19, 1992) C-16 Response C-18 Michael W. Clark C-19 Response C-21 Contra Costa Mosquito Abatement District C-22 Response C-25 East Contra Costa Historical Society C-26 Response C-27 Brentwood Recreation and Park District C-28 Response C-29 City of Brentwood Public Works Department C-30 Response C-32 California Department of Conservation C-34 Response C-36 Metropolitan Transportation Commission C-40 Response C-42 Joint Exercise of Powers Agency, State Route 4 Bypass Authority C-43 Response C_4( Contra Costa County Community Development Department C-49 Response C-54 McCutchen, Doyle, Brown & Enersen (March 31, I992) C-59 Response C-77 McCutchen, Doyle, Brown &, Enersen (April 7, 1992) C-85 Response C-89 April 7, 1992 Planning Commission Hearing Comments C-91 Response C-92 Michael Paoli and Associates C-1 Year &Joann Landgrnff Brentwood Asscrnbly of God Karl & Gloria Ba.. 3650 Morgan Territory Rd. P.O. Box 665 400 Concord Ave. Gayton, G4 94517 Brentwood, Ca 44513 Brentwood, CA 94513 Donald & Bobby Spiess James & Carol'hams Michael & Joa-,Lru Clark 300 Concord Ave. 254 Concord Ave. 4704 Moorland Brentwood, CA 44513 Brentwood, CA 94513 Midland, Ml 48640 Ed& Starlene Austin Samuel & Gloria Sciabicn Beth Clark 2250 BaLfour ltd. 1396 Madera Way 4006 Cowell Blvd. Brentwood, CA 94513 Millbrae, CA 94030 Davis, CA 45616 Joe Aguilar CalTrans Dist_4 425 Market SL,30th Floor San Francisco.CA 94105 r Contra Costa Resource Conservation District 5552 Clayton Road• Concord, California 94521 Phone {415) 672.6522 March 18, 1992 - MVR 23 Mr. Mark Jackson, Assistant PlannerCITY 0'SRENiyND0D c�WUN1TY DEYELOP}AENT DEPT. Planning Department City of Brentwood 708 Third Street Brentwood, California 94513 Subject: Draft Environmental Impact Report, Brentwood Hills Country Club, SCH# 91013056, City of Brentwood EIR File No. 90-2 Dear Mr. Jackson: The Contra Costa Resource Conservation District has reviewed the above Draft Environmental Impact Report and has the following comments. The two flood control dams located within this development site were constructed by the USDA Soil Conservation Service in 1953. At that time the system of flood control structures for the Marsh-Kellogg Watershed was designed to provide a 50-year level of protection for land under predominantly agricultural usage. Upon completion, responsibility for Ls e maintenance of these structures was transferred to the CCC .Flood Control and Water Conservation District. This proposed project will increase the area of impermeable surface and change the land use from agricul- tural land to residential housing altering both the pattern of runoff and the necessary level of flood protec- 2 tion. The developer of this project should work closely with the CCC Flood Control and Water Conserva- tion District to ensure adequate protection from peak storm discharges and to provide access for the maintenance of flood control strucrires. 3 Several corrections should be made in soil characteristics listed in Table E-1 on page E-5 of the DEIR. The following table contains the necessary corrections: r Symbol Soil Type Shrink/Swell Unified Depth Plasticity Liquid Potential Classification (inches) Index Limit KaC Kimball gravelly clay loam, CL, SC 2 to 97. slopes Pb� Pescadero clay loam Moderate-High CL 0-43 I0-15 25-35 43-66 20-30 35-45 CONSERVATION - DEVELOPMENT - SELF-GOVERNMENT Planning Department March 18, 199 . . City of Brentwood DEIR, Brentwood Hills Country Club -2- Symbol Soil Type Shrink/Swell USCS Depth Plasticity Liquid Potential Classification (inches) Index Limit J. KaE Kimball gravelly clay loam, SC,CL 9 to 30% slopes We appreciate the opportunity to review- this Draft Environmental Impact Report. Please contact our office if we can be of further assistance. i Sincerely, Thomas D. Brumleve President 1 RESPONSES TO CONTRA COSTA RESOURCE CONSERVATION DISTRICT, THOMAS D. BRUMLEVE. LETTER DATED MARCH 18, 1992. Response 1 Informational comment on the flood control structures within the project site is noted. Response 2 The draft EIR states that increased storm runoff from the project area would result from the development of structures, roads, and parking areas which are impervious to water absorption (page J-2). Pursuant to Mitigation Measure 4 on page J-3, the developer will need to work closely with the Flood Control District and the City to be sure that appropriate drainage improvements are provided that ensure that the design capacities of the regional drainage improvements are not exceeded. The Flood Control District will retain its current ownership and easements in the flood control basin areas which will ensure its ability to access these facilities for maintenance. Response 3 The corrections in sail characteristics are noted and are included in the errata section of this final EIR. t C-4 Michael Paoli and Associates o� +`''--'�'�� Contra Costa County J. Michael Watlorc� — FLOOD CONTROL ex oYcio Chie.Engineer Muton F. Kubicek,De Duy crtier •';y oJ. & Yater Conservation District 255 Glacier Drive,Maninez.CA 94553-4897 Telephone:(5 i0)313=2cOC March 16, 1992 FAX:(SiO)313-2333 Mark Jackson Assistant Planner ri City of Brentwood �� VEL pt MUNI D. 703 Third Street C r� Brertirt ood, CA 9451✓ Fii�: 97-10 t Dear Mr. Jackson: We have reviewed the Draft Environmental Impact Report for the proposed A.G. Spanos Brentwood Hill Country Club project, which was received by our office on February 19, 1992, and submit the following comments. All stormwaters entering or originating within the subject property should be conveyed, - (without diversion of the watershed), to the nearest natural watercourse or adequate man- ! made drainage facility. The proposed development is Iocated within the Contra Costa County Flood Control District's Drainage Areas 105 and 106. The applicant should pay the adopted drainage fee 2 for construction of regional drainage facilities. We also recommend that the City of Brentwood collect the additional drainage fee of$0.17 per square foot of impervious surface for construction of subregional drainage facilities. The developer needs to take into consideration both the flows from the primary and emergency spillways from Dry Creek and Deer Creek reservoirs. The developer should be advised to work directly with the Flood Control J'-Jistrict to obtain the specific: design flows ' from these facilities. t The District opposes the developers proposal to construct on-site detention.facilities that are not part of the regional plan. The District could not assure that these facilities would not have a negative impact on the design capacities of the regional ' drainage basin improvements. Finally, the District would like a statement of support from the City of Brentwood indicating that the proposed golf course facility to be constructed within the Dry Creek reservoir basin t is in the best interest of the public and the City of Brentwood. i Mark Jackson City of Brentwood 97-105 Page Two If you have any questions, please call me at 313-2285. Ve truly yours, 1 Phillip Harrington Senior Civil Engineer ! Flood Control Engineering PH:kd c:Jac97105.t3 cc: D. Bryan, City of Brentwood 97-106 r RESPONSES TO CONTRA COSTA COUNTY FLOOD CONTROL AND WATER CONSERVATION DISTRICT, PHU-LIP HARRINGTON. LETTER -.. ., DATED MARCH 16, 1992. - - Responsel. Stormwaters entering or originating within the project site will be conveyed to the nearest natural watercourses and man-made drainage facilities. The southern portion of the site drains to the existing Dry Creek reservoir and the northern,-* portion of the site drains into Deer Creek. In accordance with the tentative map drainage plan, this natural drainage pattern would be maintained in the drainage design of the project. Response 2 Mitigation Measure J,I,g has been added to this final EIR indicating that the Applicant will pay all required drainage improvement fees. i Response 3 Mitigation Measure J,I,h has been added to this final EIR providing that the design of drainage improvements for the project will take into consideration the flows from the primary and emergency spillways from Dry Creek and Deer Creek reservoirs in and that the District will be consulted to obtain necessary information. Response 4 The possible provision of on-site detention in the Deer Creek drainage area of the golf course and for the Concord Avenue area was proposed in order to avoid impacting downstream regional drainage facilities. Mitigation Measure 4 on : page J-3 of the draft EIR allows for the provision of on-site detention facilities and/or other drainage improvements as determined to be necessary by the Flood i Control District and/or the City to insure that the design capacities of the regional drainage improvements are not exceeded. Mitigation Measures J,I,c and J,I,d have been amended such that if on-site facilities are not desired, the Applicant will work with the District to provide other appropriate drainage improvements. i Response 5 { Since the project is under consideration by the City for approval, the City cannot make this statement at this time. However, if the project is approved, which includes portions of the golf course being constructed within the Dry Creel: reservoir basin, the City will find that the project is in the best interest of the public and the City of Brentwood. Michael Paoli and Associates C-7 Land PZannin C INC. 939 AIAIN STREET, SUITE E X PLE,4S,4NTON, C,4 94566, N (415)846-7007 1K FAX: (415)846-5314 February 26 , 1992 C!7 Mark Jackson, Assistant Planner C,,I ;; ?� °t` .__C."`•"'r r;'__ City of Brentwood __ 708 Third Street Brentwood, CA 94513 Re: A.C. Spanos Brentwood Hills` Country Club Dear Mark: In response to the Draft Environmental Impact Report dated February, 1992 , we are providing our comments on behalf of Brentwood Union School District and Liberty Union High School District. The Draft Environmental Impact Report addresses most concerns of both school districts. However, we would like to emphasize those concerns and ask that the following changes and/or additions be incorporated as they relate to this project. The Brentwood Union School District recommends relocating the proposed 10 'net acre school site west of the current location. The -� new location would place the school site at the intersection of two streets which would provide assurance that these streets would furnish access in a timely manner. The Brentwood Union and Liberty Union High School Districts have been working with the city and local developers to formalize an acceptable financing agreement to assist in the funding of new 2 school. facilities . To date the Brentwood agreement has been formalized but not fully executed. However, the Liberty agreement is still outstanding. The districts request that this project be conditioned to participate in the Brentwood Union and Liberty Union High School District's agreements. Lastly, we recommend rewarding the cumulative impact and mitigation measures section to reflect the following. wording: 3 New development would be required to pay school impact fees at rates in effect at the time of permit application. However, current experience with the fee ; system suggests that this -a. source of funds would be insufficient, both in terms of the total amount of funding and the -availability and timing of funds, as new facilities are needed. To help with this situation, the City should suppori school district effor=ts to Cl--..,-- O-L7:. A..__.... Mark Jackson, Assistant Planner February 20' , 1992 Page 2 create additional, funding mechanisms, such as a Mello Roos district, for school construction. Under Ordinance 423 , the city trust make findings that development projects will not generate demand for school services in excess of available classroom capacities in order to approve such developments. To create sufficient capacity, it would be necessary for the project sponsor to participate in Community Facilities Agreements. An adequate financing Urogram would render the impact to schools less than significant . The City could require that this be verified through a "will serve" letter from the affected school districts . In conclusion, the school districts are in accordance with the above comments and would like to see these comments and/or changes reflected in the report. If you have any questions, please contact our office. Sincerely, V� Kimberly Wood District Consultant cc: Doug Adams -- Brentwood Union School District Phil White - Liberty Union High School District i y i 1 c RESPONSES TO LAND PLANNING CONSULTANTS, INC., KIMBERLY WOOD (ACTING ON BEHALF OF THE BRENTWOOD UNION SCHOOL DISTRICT AND LIBERTY UNION HIGH SCHOOL DISTRICT). LETTER DATED FEBRUARY 26, 1992. Response I This comment is consistent with Mitigation Measure C,5 in the summary section of the draft EIR, which recommends shifting the location of the school site west to the northeast corner of 28 Staeet and 4 Drive or to other more appropriate locations within the project. (This mitigation measure has been modified in this final EIR. See responses to Brentwood Union School District, J. Douglas Adams. Letter Dated March 10, 1992). Response 2 Mitigation Measures Q,I,b and Q,1,c in the summary of the draft EIR require that the project be conditioned upon participation in agreements with the Brentwood Union School District and Liberty Union High School District. Response 3 Based upon this comment, the Mitigation Measure Q,2. in the draft EIR has been amended in the final EIR as follows: In approving new development projects, the City shall find, pursuant to Ordinance No. 423 (Section 17.805 of the Zoning Ordinance), that the project will not generate a demand for school services in excess of available classroom facilities. If there is not sufficient capacity, as determined by information supplied to the City by the affected school districts, the new development projects shall be required to participate in Community Facilities Agreements with the affected school districts in order to assure sufficient capacity when the project is constructed. C-10 Michael Paoli and Associates L -NTWOOD UNION SCHOOL . .STRICT BRENTWOOD SCHOOL 250 FIRST STREET GARIN SCHCOL 115'634.3108 6REN7W000.CALIFORNIA 94513 t;5 53s•5�:? 1151534.7168 EDNA HILL SCHOOL FAX:t 15.•634.$533 RCN m-'NN SCHoCL 1151634.3548 March 10 , 1992 �1 Mark Jackson , Assistant Planner City of Brentwood 1992 708 Third Street Brentwood , CA 94513 Ci 'OFBRENTw000 coma UDEV tOPMENT DEQ RE: A.G. Spanos , DEIR Brentwood Hills Country Club Dear Mark: The District and our consultants recently met with Mr. Jim Panagopoulos of A.G. Spanos Company regarding concerns on the pro- posed elementary school site as illustrated on above referenced development proposal . Our concerns are essentially those that were raised in the DEIR for this project including access and cir- culation , grading , size of site , and possible toxic contamination . Mr . Panagopoulos assured the district that A.G. Spanos Company would mitigate these concerns to our satisfaction. in that regard the school district would find the elementary school site accept- able provided A .G. Spanos were to meet the following conditions : 1 . Site Access and Circulation : The proposed site has literally no access through A .G . Spanos property other than a stubbed street . All other streets illustrated are shown half on the school site and half on two adjacent properties not controlled by A.G. Spanos or a part of this development proposal . To our knowledge neither of these properties are proposing any development plans to the city : The state recommends that a school site have at least two access points . For this site to be approved by the district, the district would need assurance that the other half of these two streets be built by someone other than the school district in a timely manner with the construction of the school facility . Otherwise this site would not be acceptable . We request that you condition the approval of this development in a manner that assures the district of the construction of these roadways . 2 . Site Size: The School District requires ten net acres for an elementary school . A portion of this requirement could be jointly used with a park district if the land configuration and park district needs were consistent with the school districts planning for the school facility . We request that you condition the approval of this development to provide a ten net acre usable school site. 3 . site Grading : The proposed site is presently a. hill ranging in elevation Of 140 to 180 .feet . The state will not support excessive costs to modify a school site if other sites exist that would not require such expenditures . Therefore , we ask that the site be graded to the requirements of the district' s architect to make the property usable for a school site . 4 . Toxic : As in all properties under consideration, there exists the possibility of soil toxics . We ask that the developer be responsible for determining the existence of toxics on the property and if removal is recommended that they be respon- sible for that as well . These requests are consistent with as related to LMr. Panagopoulos when he first proposed this project to the district hoard over a year ago. The site as it is proposed without these conditions of approval would be unacceptable to the district for the reasons listed above . If the development approval lists the above re- quested conditions of approval , the site would be acceptable . Thank you for your consideration on this matter . If you have any questions regarding this information, please give me a call or Mr . Laird Neuhart , district consultant, at 846-7007 . Sincerely , `C J . Douglas Adams Superintendent cc: : Laird Neuhart - District Consultant Jim Panagopoulos - A.G . Spanos t RESPONSE TO BRENTWOOD UNION SCHOOL DISTRICT, J. DOUGLAS ADAMS. LETTER DATED MARCH 10, 1992. This letter expresses the Brentwood Union School District's concerns regarding site access and circulation, site size, site grading, and toxic materials and states that the school site shown on the project development plan would be acceptable to the District under certain conditions. The conditions requested by the District have been added as mitigation measures to Impact C,5 in the summary section of this final EIR (replacing the mitigation measure in the draft EIR) and will be made conditions of tentative map approval. The new mitigation measures are as- follows. 5 (a) The Applicant shall provide two points of public street access to the school site prior to the start of school construction. The access shall be provided by fully developed public streets identified as 27 Street and 28 Street on the tentative subdivision map. 5 (b) The Applicant shall grade the school site to the requirement of the District's architect prior to the start of school construction. 5 (c) The Applicant shall provide all testing and studies for toxic materials affecting the school site as needed to satisfy the requirements of the District and the State of California, and for the removal of any toxic materials in accordance with the District and state requirements. If the District or state determine that the existence of any toxic materials cannot be remediated to an acceptable level, the Applicant shall provide within the project site an alternative location for the school acceptable to the District. 5 (d) If the Applicant does not comply with one or more of the above conditions, the Applicant shall provide within the project site an altemative location for the school acceptable to the District. The District's requirement for a 10-net-acre school site is provided for by Mitigation Measure Q,1,a. Michael Paoli and Associates C-13 Land 21anning' ConsuLunts INC. 239 h1,41N STREET, SUITE E ■ PLEA S,4NTON, C,4 94566, (415)895-7007 ■ F,4X:(415)846-5314 np, MAR I � 132 March 18 , 1992 CITY OF BRENTWOOD COMMUMTY OMLDPMENT DEPT. Mark Jackson Assistant Planner Planning Department City of Brentwood 708 Third Street Brentwood, CA 94513 Re: A.G. Spanos Brentwood Hills Country Club Dear,Mark: This. letter is in response to our recent telephone conversation regarding the above referenced project. The Brentwood Union School District recommends relocating the proposed 10 net acre school site west of the current location as indicated in the Environmental Impact Report proposal . The new location would place the school site at the intersection of two streets entirely within the proposed development boundary. This would provide assurance that these streets would furnish access to the school in a timely manner. If you have any questions, please contact our office. Sincerely, r Ji-- Laird Neuhart District Consultant cct Doug Adams - Brentwood Union School District Phil White - Liberty Union High School District Serving Public Agencies RESPONSE TO LAND PLANNING CONSULTANTS, INC., LAIRD NEUHART (ON BEHALF OF THE BRENTWOOD UNION SCHOOL DISTRICT). LETTER DATED MARCH 18, 1992. This comment reflects the recommendation of the draft EIR to shift the location of the school site to the west to the northeast corner of 4 Drive and 28 Street or another appropriate location within the project site. It is the City's understanding that the District will accept the site as shown on the tentative subdivision map subject to the conditions listed in the response to the District's letter of., March 10, 1992. Michael Paoli and Associates C-15 BRENTWOOD UNION SCHOOL DISTRICT SA=NTWOOo SCHOOL 250 FIRST STREET GAR!N SCHOOL 1151631.3109 BRENTWOOD,CALIFORNIA 91513 1151531.5252 115/631.1168 'cDNA HILL SCHOOL FAX;Al 51634-85S3 PON NUNN SCHOOL t;51516.0131 1T51634•35tS March 19 , 1992 2 3 1992 Mark Jackson , Assistant Planner }TY OF SR City of Brentwood Ct�1"��,th€irsDEVEtDPtEt�� Pt 708 Third Street Brentwood , CA 94513 RE: A . G. Spanos , DEIR Brentwood Hills Country Club Dear Mark: Jim ranagopoulos of A .G . Spanos Co . has asked me to consider re- vising two sections of my letter sent to you dated March 10 , 1993 . Specifically, he has asked me to make the following changes : "The proposed site is presently a hill ranging in elevation of 140 to 180 feet . " ( Section 3 of the letter ) Change to "The proposed site is presently rolling terrain and would require grading . " He asked that I delete the following sentence ' in Section 4 : "The site as it is proposed without these conditions of approval would be unacceptable to the district for the reasons listed above . " - He has asked me to add to Section 4 in the place of this deleted sentence : "Additionally, the Department of Education, School Facilities Plan Division have reviewed the proposed ten acre elementary school site and: have found it to be an acceptable site . " ; .I responded to Jim with the following comments : First request : Jim would like reference to the elevation deleted . We used the information from the EIR for the elevation reference . I agree that the terrain is rolling and requires grading . Second request : The site as proposed is unacceptable without the proposed conditions and should be so noted in the .letter . Third request : The Department of Education, School Flan Division has reviewed the site and found it to he accept- able provided the proposed conditions are net. , Thank you for your interest in helping us to locate a suitable site for the school district . We appreciate all the work you have done on our behalf . Please contact me if you have additional questions . Sincerely, J . Douglas Adams Superintendent cc : Jin Panagopoulos Laird Neuhart RESPONSE TO BRENTWOOD UNION SCHOOL DISTRICT, J. DOUGLAS ADAMS, LETTER DATED MARCH 19, 1992. This letter responded to a request by the Applicant to change portions of the District's letter of March 10, 1992. The content of this letter does not affect the EIR or the conditions requested by the District in its March 10, 1992 letter, which have been included in this final EIR as mitigation measures. C-18 Michael Paoli and Associates FEB 2 71992 4704 Moorland CITY tli:EV LOPM�ENT DEPT, COhiMUNiTY DEVELOPMENT Midland. MI 48640 February 24. 1992 Mr. Mark Jackson, Assistant Planner Planning Department City of Brentwood 708 Third Street Brentwood, CA 94513 Dear Mr. Jackson: I appreciate your recent letter (1/27/92) and the copy of the draft Environmental Impact Report on the Brentwood Hills Country Club (BHCC); both documents help me to more clearly understand the developments under way which will impact my property. As I read the EIR it seems to strongly support the arguments that I put forth in my earlier correspondence with Mr. Rowland. namely: 1. The need for the park is generated by the BHCC development; see page R-3, 'The Spa.nos property by itself. with a proposed 1.051 residential units and a population of 3,212, would need 9.6 acres of park land to meet the General Plan standard...Only 1.6 of those acres. however, are on the Spanos property." 2. There are better alternatives for park land on the Spanos property; see pages U-11/12. "Planning a park or open space to incorporate the site, witl'i fencing around the Goal mine site...is consistent with the City and County General Plan goals and policies to preserve areas of historic value...The mining area could be incorporated as past of a park site which could extend west to the top of the knoll 2 L4 preserve a um br of larcre oak trees." In fact. the EIR strongly recommends this action! See Table A-2, Mitigation Measures (page A-15. 1. (e)): "The area on top of the knoll in the southeast portion of the site (P Court and adjacent single family lots as shown on the project land use plan) shall be preserved as open space or, a public park- The park could extend to the east to encompass the old mine site and intervening open space (see mitigation measures in Section U. Cultural Resources). This measure would preserve nine additional oak trees." Also see page V-10, which also recommends this in conjunction withmy recommendation to zone my land SF-5000 (Component 2 of the modifications requested by the Planning Commission): "Implementation of the mitigation measure specified in Sections F and U of providing a park site on the southeast knoll area of the project site (to preserve oak trees and the mine site), however. would allow the park acreage standard to be substantially met.." Finally. it even appears that there are strong advantages to placing the school site inside the Spanos development (see pages C-9. 10. 11, which detail the 4 disadvantages of siting the school near Concord Avenue). i Mr. Mark Jackson February 24, 1992 Page Two {2} In summary, since the EIR gives recommendations that there is a more appropriate pa.rk site on the 5panos property (from both a historical and ecological perspective). I would again strongly request that my property be zoned 5F-5000. This would mean that the BHCC development would fulfill the need for park space itself rather than unfairly 5 taking my property at both a price and tinning over which I would have little or no control. Mr. Jackson, I would appreciate your forwarding these arguments to both the members of the Planning Commission and the City Council as well as LAFCO: or if I must do this, could you please send me the names, addresses, and facsimile numbers of these people so I can correspond directly. Thanks for your help; I hope and trust we can resolve this situation so that I am left with some viable alternatives for my land as we approach retirement. Yours truly, Michael W. Clark t RESPONSES TO MICHAEL W. CLARK. LETTER DATED FEBRUARY 24, 1992. Response 1 Comment reflecting information in the EIR on the amount of parkland needed to serve the Spanos portion of the project site is noted. Response 2 This comment reflects the recommendation of the draft EIR to preserve the coal mine structure site and the adjacent top of the knoll as a park. Response 3 The comment refers to the alternatives section of the draft EIR, which indicates that if Mr. Clark's property were to be zoned SF-5000 and the southeast knoll/mine site area were to be preserved as a park, the park acreage standard .,would be substantially met. However, less park acreage would be provided on the project site under this alternative because the Clark property, at about I I acres, is larger than the southeast knoll/mine site area, which would be 7-8 acres. Response 4 The school site, as shown on the project land use plan, is within the Spanos-owned portion of the project site. The recommendation of the draft EIR is to move the school site further west on the Spanos property or elsewhere within the project site. Response 5 The EIR does not make comparative judgments as to whether areas on the Spanos- owned portion of the project site are more appropriate for a park designation in lieu of Mr. Clark's property. The EIR does provide that if the park site designated on the project land use map cannot be purchased prior to the commencement of Phase 2 of the project, the Applicant shall provide other appropriately situated land for park development. This ensures that the project cannot be substantially developed without the provision of an adequate amount of park acreage. Michael Paoli and Associates C-21 CONTRA COSTA BOARD OF TRUSTEES MOSQUITO ABATEMENT DISTRICT ADMINISTRATIC PRESIDENT 155 MASON CIRCLE MANAGER Ronald wheeler. Ph.D. CONCORD. CA 94520 Charles Jeesley. Ph.D Mortinez (5101' C85-9301 VICE PRESIDENT (BCC) 331-6321 David Jameson, Ph.D. FAX: 685-0286 Danville 5ECRETARY March 20, 1992 Freda EAcksen Pleasant Hill ANTIOCH 2 3 l 992 Charles T. Mazzei Mr. Mark Jackson CITY OF BRENTWOOD 6RENTWOOD Assistant Planner CCLIMUNITf DEVELOPMENT DEPT Vocont Planning Department CLAYTCIN City of Brentwood Jahn Hanley 708 Third Street CONCORD Brentwood, CA 94513 Eorl MortenSon SUBJECT: DRAFT ENVIRONMENTAL IMPACT REPORT BRENTWOOD HILLS Patricia Delta CONTRA elta CO. COUNTRY CLUB Jim Pinckney ur,iliornRass Dear Mr. Jackson: EL CERRITO Dr, Sedgwick Mead We have reviewed the Draft Environmental Impact Report for Brentwood Hills Country Club and we at Contra Costa Mosauito HERCULES Dr, Ninon Kafka Abatement District (CCMAD) would like to express some concerns. Some of the following comments are similar as those LAFAYt'i`,E for the Fairway Palms/Hancock Annex however, others address Man"M;Iby different problems. mORAGA vaunt Whenever golf courses and parks are created, there are going ORiNDA to be water detention basins and possible uses of reclamation Charles Lupsho water within the boundaries of these areas. These detention P,NoLE basins in the project area can cause problems with Culex and vacant Culiseta mosquitoes, and can lead to mosquito problems year round. In addition, Culex tarsalis is a potential vector of PITTSDURG Western Equine Encephalitis and St. Louis Encephalitis. Robert Hussey RICHMOND Any time residential developments are created in previously Vacant unoccupied areas you create problems with urban runoff. The SAN PABLO development of a previous grazing area will increase the vocont monitoring required to avoid the emergence of large numbers of r Aedes mosquitoes. In addition, storm drains . clogged with vocant debris can form pools of water which can lead to Culex pipien mosquitoes within two weeks time. Ultimately, construction of WALNUT CREEK homes will create new potential back yard mosquito breeding Nancy(jrawnfield 7 areas, such as containers and ornamental ponds. ' This will in turn increase thelevelof "service required from CCMAD. Comments to Draft Environmental Impact Report: 1} Section A. SUMMARY: Pg. A-3 describes Public Facilities and Services in the project area. CCMAD is not even mentioned on this list. 2) Section B. PROJECT LOCATION AND DESCRIPTION: Table B-1 on Pg. B-10 makes no mention of CCMAD and the fact that this protect will result in a dramatic increase in the level of services we will provide in the project area.. 3) Section J. STORM DRAINAGE: Whenever new residential developments are created you can experience increased problems with urban runoff in local catch basins and creekbeds. These areas can produce mosquitoes in as little as two weeks . 4 ) Section O -- R. PUBLIC SERVICES . The draft EIR fails to acknowledge the impact on services that will be required from CCMAD because of new development. The construction of 1,-202 new residences as well as a golf course with water detention basins will lead to a significant increase in the level of service required from CCIMAD. 5) Not Listed. HUMAN HEALTH: Nowhere in the Draft E. I.R. is the area of public health addressed. The increase in population in the project area can have a significant impact on Human Health, as the likelihood of being exposed to those mosquitoes that can transmit encephalitis will increase. (as explained previously) . Recommendations: 1) If private recreation areas are created with detention ponds and lakes, the water should be as deep as possible with steep sides to minimize mosquito production. The water level ' should be kept as constant as possible to avoid production of floodwater, Aedes, mosquitoes. Whenever possible, emergent vegetation should be minimized, as this provides a protective and nutritive habitat for immature mosquitoes. 2) Construction of, as well as changes to, existing catch basins and flood control - channels should be completed With 5 attention to the fact that even small pools of standing water can quickly become breeding grounds for mosquitoes. Channels and basins should be as deep as possible and have steep sides to minimize mosquito production. CCMAD should be consulted recxardinc any improvements to these existing drainage ditches or the creation of new ones. 3) If water reclamation alternatives are considered' for recreation areas within the project boundaries, Contra Costa Mosquito Abatement District should be consulted in the design of alternative methods and disbursement sources. Therefore, we at Contra Costa Mosquito Abatement District feel that the public services we will be required to supply to the project area warrant acknowledgement in the appropriate areas mentioned above. In addition, the preceding areas of storm drainage}, public S service and public health should be addressed in the Environmental Impact Report. In closing, this office has the expertise, and should be consulted, regarding mosquito control in the project area. Please call our office should you have any comments or questions. sincerely, Ray WYa etz o l Administrative Assistant CC: Brentwood Hills File RW J w RESPONSES TO CONTRA COSTA MOSQUITO ABATEMENT DISTRICT, RAY WALETZKO. LETTER DATED MARCH 20, 1992. Response I Comments regarding the potential for mosquito problems to develop as a result of the project and the need to increase the level of service provided by the District are noted. Response 2 CCMAD is included in Table A-i in this final EIR. Response 3 CCMAD should have been included in Table B-1 on page B-10 of the draft EIR. This is noted in the errata section of this final EIR. Response 4 Comments regarding the potential mosquito problems related to urban runoff in local catch basins and creel: beds, the need for increased mosquito abatement services, and the potential impact to human health due to mosquitoes that can transmit encephalitis, are noted. There is a potential for some increase in local mosquitoes; however, this is not considered to be a significant environmental impact. As a result of these comments, a new impact related to mosquito abatement has been added to the summary section of this final EIR under storm drainage (Impact J,5). Response 5 These recommendations have been added in the summary section of this final EIR as mitigation measures to Impact J,S. Response 5 Comment noted and addressed by previous responses. i Michael Paoli and Associates C-25 'Tzaet Gvntra C . P.O. Box 2t?-2 BRENTWOOD, CAUFORNIA 9451.3 April 1 , 1492 0 � @ 151 N Mr. Mar{: Jackscrrz, Assistant Planner APR 2 - 1992 Citv of Brentwood 700 Third Street C4TyO BRRENI- Brentwood, CA 94513 CouMUtiflyDEVEtOPMENTDEPT. Re. A. G. Spanos Draft EIR Brentwood Hills Country Club near Mark: In response to the Draft Environmental impact Report, dated February 1Y92, the Gast Centra Costa Historical Goriety submits the following comments regarding the remains of the Brentwood coal mine on the project site. Representitives from the East Centra Costa Historical Society have been given permission by the property owners to visit the site and remove any artifacts it wished for its museum. Six members of the museum exhibit committee visited the site late in 1991 , took pictures, gathered a few artifacts and established an exhibit on the Brentwood Coal Mine in our museum. We wish to thank the property owners for making this opportunity available to us. The Brentwood Coal Mine is important to the history of the Brentwood area as being one of the first industries in the area and directly responsible for the establishment of the town of Brentwood. The town took its name from the mine. Many of the old homes and other buildings in Brentwood were moved into town from the Brerttwood Coal Mine. Our Society' s Board of Directors meet last night to discuss the A.C. Spanos Draft ETR. We agree with the conclusions of the report and have no plans for the site. Should you have any questions, please contact me. I may be reached anytime at 625-42Eeo. Sincerely, f Carolyn L. Sherf y, President RESPONSES TO EAST CONTRA COSTA HISTORICAL SOCIETY, CAROLYN L. SHE—RFY. LETTER DATED APRIL 1, 1992. Response I Comment regarding visitation of the site and collection of artifacts (with the permission of the property owner) is noted. Response 2 ' Comment regarding the importance of the mine to the history of the Brentwood area and its rote in the establishment of the town of Brentwood is noted. This type of information was presented in Section U of the draft EIR. Response 3 This comment indicates that the East Contra Costa Historical Society is in agreement with the conclusions of the draft EIR but has no pians for the site. Michael Paoli and Associates C-27 - - : EDE ALUO RECREATION AND PARK DISTRICT March 30 , 1992 l MAR 3 p S92 Mark Jackson, Assistant Planner CITY OFSRENTWOOD Planning Department COMMUNITY DEVELOPMENT DEPT, City of Brentwood 708 Third Street Brentwood CA 94513 Subject : Draft Environmental Impact Report Brentwood Hills Country Club Dear Mr. Jackson : The Brentwood Recreation & Park District would like to make the following comments regarding the Brentwood Hills Country Club Environmental Impact Draft Report : 1 . Page R-1 , Paragraph 6, the City of Brentwood owns all parks within City Boundaries except Brentwood City Park, located at -� Dainty and Oak Street , which is owned and maintained by The Brentwood Recreation and Park District through county property taxes and augmentation funds . 2 . The BR&PD cannot comment on the 16. 7 acre park site at this time, however we are very interested in participating in it 's development . We hereby request that all current information related to the development of this park be forwarded to us as soon as possible as well as all future plans relating to this park site as they become available. If you should have any questions regarding this letter , feel free to contact me at (510) 634-1044 . Sincerely, Linda L. Cawthorn Office Manager cc: Chief ,lames Frank, City Liaison Officer Gilbert Dominguez , President BR&PD Board of Directors Yim Vogley, Vice-President Gayle Servin , Board Member " Elgin Martin, is Robbie Myers , it 740 6 Third Street • Brentwood, California 94513 • (415) 634-1044 RESPONSES TO BRENTWOOD RECREATION AND PARK .DISTRICT, LINDA L. CAWTHORN. LETTER DATED MARCH 30, 1992. Response I The correction to Page R-I, Paragraph 6 of the draft EIR is noted. The correction will be reflected in the errata section of this final EIR. Response 2 3 Consistent with current practice, the City will coordinate with the District in the planning and development of any paikiand within the project site. 4 i i f i Mchael Paoli and Associates C-29 MEMORANDUM DATE: March 31, 199 d TO: Mark Jackson FROM: Chuck Vosicka CITY y gELOPME O CO#etMUNiT'f DEYELOP�fJZT DEPT. SUBJECT: Draft EIR for A. G. Spanos Brentwood Hills Country Club We have reviewed the draft report and offer the following comments for consideration: 1. As a mitigation, no structures are to be built in areas with less than 100 feet of cover over the suspected mined-out areas in the vicinity of the coal mine. No definition is given as to where these areas are, or to how they are to be located. The club house is specifically identified as being in such an area, and the report calls for "a detailed engineering analysis of soil and subsurface conditions" to be conducted. This analysis needs to be completed to the satisfaction of the City Engineer prior to approval of the final map. 2. The report correctly identifies that two water storage tanks (at two different elevations) will be necessary to provide water service for the project. However, the report is .not clear as to how they will be built. The CIFP currently under consideration will construct only one tank. Unless the improvements to be constructed by the CIFP are expanded to include the second water tank, the other tank will therefore need to be the responsibility of the developer. 3. Any agreement for irrigation water for the golf course (and roadside landscaping?) with the East Contra Costa Irrigation District will need to meet with the approval 3 of the City. 4. This project needs to be responsible for any shortage in funding for maintenance of facilities that are constructed by it. The report points out that there will 4 probably be shortage, but is relying on the City's General Plan update to quantify that shortfall. This detailed information should be presented in this report so that the project's impacts are fully defined. 5 5. All cul-de-sacs need to meet City standards. Memo to Mark Jackson March 31, 1992 Page 2 6. The mitigation measure on page H-8 limiting the speed of construction vehicles to 15 miles per hour is unrealistic and unenforceable. 7. Any rerouting of the PG&E/Stanpac and Chevron pipelines alongside public streets 7 or crossing them, will require a special design to avoid conflicts with City udiky lines within those streets. The City Engineer shall approve any such design. i i RESPONSES TO CITY OF BRENTWOOD PUBLIC WORKS DEPARTMENT, CHUCK. VOSICKA. MEMORANDUM DATED MARCH 31, 1992. Response 1 The location of the mining area is shown on Figure E-4 of the draft EIR. According to ENGEO, Inc., no residential lots, as depicted in the tentative subdivision map, are located in an area having less that 100 feet of cover over the mining areas. Regarding the Country Club building, Mitigation Measure E,6,b in the summary has been changed to require that the detailed engineering analysis be completed to the satisfaction of the City Engineer prior to approval of the final subdivision map. Response 2 Mitigation Measure K,l,a has been modified to reflect that only one water storage reservoir will be provided by the CIFP and a new Mitigation Measure K,l,b has been added indicating that unless the CIFP is modified to include the construction of a second reservoir, the second reservoir would be the responsibility of the Applicant. Response 3 Mitigation Measure K,l,b in the draft EIR (which is now K,l,c in the final EIR due to the addition under Response 2, above), has been modified to add that any agreement with ECOID will need to be approved by the City. Response 4 Detailed fiscal analysis of the proposed project is outside the scope of work of the EIR. Based upon the concerns of the Public Works Department during its review of the administrative draft EIR, an impact was added to the draft EIR regarding increased operation and maintenance costs for public improvements needed to serve new development which might not be offset by revenues for new development. Rather than singling out one development and without a substantiating fiscal analysis, the approach taken was to require a comprehensive arfalysis to be conducted as part of the General Plan update process whereby if there was in fact a revenue shortfall from new development, the City could consider establishing a fee structure to cover these costs. Response 5 Mitigation Measure G,2 has been changed to require that the cul-de-sacs meet City ._standards rather than "shortened to be closer to" City standards. C-32 Michael Paoli and Associates Response 6 This mitication measure has been eliminated in the summary section of the final EIR. Response 7 The text of this comment has been added to Mitigation Measure N,4,a. r Michael Paoli and Associates C_33 THE RESOURCES AGENCY OF CALIFORNIA :.alifornia e m o r a n d u m - SI70 Date : March 23 , 1992 Fo Mr. Douglas P. Wheeler secretary for Resources Z6 ��y�sd`J7 5v6iect: Draft Environmental Mr. Mark Jackson Impact Impact Report (DEIR) City of Brentwood a/ for the Brentwood 708 Third Street � Hills Country Club Brentwood, CA 94513 SCH #91013066 From Department of Conservotion---Office of the Director The Department of Conservation, which is responsible for monitoring farmland conversion on a statewide basis has reviewed the City of Brentwood's 'Draft Environmental Impact Report (DEIR) for the project referenced above. The project proposes taking the necessary steps to convert approximately 750 acres, 600 of which is covered under Williamson Act contracts, to residential development. The land is currently being used for grazing and a walnut orchard and is adjacent to additional contracted land. The Draft EIR does mention the need for certain findings to be made in order for a Williamson Act contract to be canceled and cites the farmland conversion as being a significant unavoidable impact. However, the Department is concerned about the impacts of this project on the adjacent agricultural land to the south and northeast of the project site. since development of this project removes 750 acres of land from agricultural production and could have environmental impacts on adjacent agricultural land under Williamson Act contracts, the Department recommends that additional analysis of the . impacts on agricultural and Williamson Act lands be undertaken to identify possible mitigation measures. The Department also recommends that an evaluation of the agricultural character of the project site and an assessment of the types and relative yields of crops grown in the affected areas, or in areas of similar soils under good agricultural 2 management be included in the Final Environmental Impact Report (FEIR) . In addition, an investigation into the agricultural potential of the area's soils, as defined by the Department of Conservation's Important Farmland Designations should be included. The FEIR should address the farmland conversion impacts such as the type, amount and location of farmland conversion that could result from development of the project. Also, the cumulative and growth-inducing impacts on farmland in the surrounding area and adjacent Williamson Act lands should be Assessed along with a discussion of the likelihood of these lands becoming urbanized as a result of the project. m . hne-'+ , e diita X12 ✓Cat h�611i March 23 , 1992 Page Two Some possible mitigation measures which would lessen the farmland conversion impacts include: - Increasing densities or clustering residential units to allow a greater portion of the area to remain in agricultural production. - Protecting other existing farmland of equivalent, or better, quality through planning policy that relies on an active and strategic use of the Williamson Act. Establishing buffers such as setbacks, berms, greenbelts and open-space areas to separate farmland from urban uses. Adopting a farmland protection program that utilizes such Land use planning tools as transfer of development rights, purchase of development rights or conservation easements, and farmland trusts. The Department appreciates the opportunity to comment on the DEIR. We hope that the farmland conversion impacts and the Williamson Act contract issues are given adequate consideration in the FEIR. If I can be of further assistance, please feel free to call me at (916) 322-5873 . i Stephen E. Oliva Er * tonmental Program Coordinator cc: Kenneth E. Trott, Manager Land Conservation Unit Contra Costa Resource Conservation District t r } } i i RESPONSES TO STATE OF CALIFORNIA DEPARTMENT OF CONSERVATION, STEPHEN E. OLIVA. MEMORANDUM DATED MARCH 23, 1992. Response 1 The project will have little or no impact upon the agricultural land to the northeast the project site. The land to the northeast of the project site is within the City's Sphere of Influence and its corporate limits, is designated in the City's existing General .Plan for urban development, is closer than the project site to existing urban infrastructure, and is the subject of a pending development proposal. Therefore, it is unlikely that the project site, most of which is currently outside the City's sphere of influence and not designated for urban development, would have any effect on whether the property to the northeast develops. Land to the south of the project site is used for grazing. It is designated on the Important Farmland Map as Grazing Land and Farmland of Local Importance. As stated in Section Y of the draft EIR (Growth Inducing Impacts), the project may have a growth-inducing effect on the property to the south because the City's Sphere of Influence and corporate limits would be moved immediately adjacent to this property. As stated on pages D-7 and D-8 of the draft EIR, development of the project site could enhance the potential for urbanization of adjacent land to the south by making this property contiguous to development. However, this land is being considered for urban development as part of the City's General Plan update. Therefore, the potential for urbanization of the land to the south of the project site may be more dependent upon policy decisions to be made as part of the pending General Plan update than upon development of the project site. This land is under a Williamson Act contract, which is scheduled to expire in February 1996. Therefore, cancellation of the contract on the project site would not affect eventual cancellation of the contract on the land to the south. .Response 2 Section D of the draft EIR (Agricultural Resources) addressed the agricultural character of the project site and assessed the types and yields of crops grown on the site based upon the actual and historic use of the site, the U.S.D.A. Soil Conservation Service Soil Survey for Contra Costa County and Soil Candidate Listings, the Department of Conservation Important Farmland Designations, and the Contra Costa County Department of Agriculture 1990 Agricultural Report (see pages D-1 through D-4 and D-9 and D-10). Figure D-2 shows the Important Farmland categories for the project site and all land within and immediately adjacent to the Brentwood Planning Area. The vast majority of land within the Brentwood Planning Area is shown as Prime Farmland. As stated in the draft EIR -and-.in Response 1, above, the project will not affect whether the land to the northeast of the site is developed, which is the only intensively cultivated land C-36 Michael Paoli and Associates adjacent to the site. The remaining land adjacent to the site which could be considered affected is rangeland. Thus, an assessment of the types and relative-.. ., yields of crops would not be applicable. Concerning the agricultural potential"6f the site, the EIR indicates that although only the 58-acre walnut orchard qualifies as Prime Farmland due to being irrigated cropland, 180 acres of the site consists of soils listed as candidates for Prime Farmland (see page D-3). Response 3 The draft EIR addressed these items to the extent feasible and practicable in,­ Section D (Agricultural Resources), Section W (Cumulative Impacts), and Section Y (Growth Inducing Impacts). The specific places where these items are discussed are on the bottom of page D-7 and the tap of page D-8, Impact a on page D-12, pages W-1 through W-3, the last paragraph of page Y-1, and the top half of page Y-2. Response 4 Most of the project site is grazing land except for 58 acres of Prime Farmland in the northeast corner of the site. This portion of the site is contiguous to the, City limits, is within the City's Sphere of Influence, and is designated in the existing 4 General Plan for Planned Employment Center uses adjacent to the proposed Delta Expressway. Clustering units on the site or increasing densities so as to avoid this area would leave a small agricultural island surrounded by urban development and is, therefore, not considered to be a viable option. Three alternatives were considered in the EIR which would minimize the loss of grazing land on the site: "Existing General Plan", "No Hillside Development and Reduced Number of Residential Units", and "Alternative Project Location". These alternatives are discussed in Section V of the draft EIR. Response 5 A policy already exists in Contra Costa County which protects agricultural and open space land. Contra Costa County, in 1990, established a 65/35 Land Preservation Standard which limits urban development in the County through the year 2005 to no more than 35 percent of all land in the County and requires at least 65 percent of the land to be preserved for agriculture, open space, wetlands, parks, and other non-urban uses. The County applies the 65/35 standard to all areas of the County, including urban and non-urban uses within City boundaries. An Urban Limit Line, beyond which no urban uses can be designated, has been established by the County to facilitate the enforcement of the 65/35 Land Preservation Standard. The standard protects thousands of acres of grazing land similar to that found on the project site and the prime agricultural core of the County, which is located south and east of Brentwood. The project site is located within the Urban Limit Line, which allows for possible urbanization with the approval of a General Plan amendment. �_ Michael Paoli and Associates C-37 Response 6 The location and design of the project provides for appropriate separation from adjacent agricultural lands. The project site is separated from agricultural lands to the east by the existing Concord Avenue, adjacent to which the proposed Delta Expressway would be built. This land is within the current City limits, is designated in the General Pian for urban development, and is the subject of a pending development proposal. Agricultural land to the south, west, and north is open rangeland. Balfour Road, designated as a thoroughfare in the General Plan, would separate the property from rangeland to the north. The land to the north is also the subject of a pending development proposal. The project site directly abuts rangeland to the south and west. Substantial open space areas ranging from 200 to 400 feet in width are provided along the southern and most of the wester boundary of the site. Response 7 The Contra Costa County General Plan, adopted in January 1991, includes the following implementation measure (8-be) related to transfer/purchase of development rights: Study the impact of adopting Transfer or Purchase of Development Rights (TDR/PDR) programs in priority areas of the County as a means of mitigating development pressures and preserving agricultural land. Conduct a detailed study of transfer/purchase of the development credits approach to determine: (1) the overall feasibility and usefulness in implementing General Plan policy; (2) the specific mechanisms to be utilized; (3) the areas of the County where these mechanisms could be utilized; (4) the organizational and administrative requirements of such a program,including an analysis of the benefits of creating a non-profit land trust to hold agricultural land and easements; (5) the cost of the program to the County and potential revenue sources. Mitigation Measure D,1 has been added to the summary section of this final EFR, which states that the City shall encourage and support the implementation of the C-38 Michael Paoli and Associates County's Agricultural Resource Implementation Measure 8-be related to transfer/purchase of development rights and other policies and implementation measures related to preservation of agricultural land. z i Michael Paoli and Associates C-39 MTC l ' METROPOLITAN mm 3 1 1992 TRANSPORTATION COMMISSION CITY OF BRENTWOOD COMMUNITY OEVE.O?VENT DEPT. Alameda Coup March 30, 1992 _.. FOWA20 R.CAM"ILL Mark Jackson DAM S.W? Planning Department Contra C*%u County City of Brentwood POSEXT I.SCH20DER STretwlit 708 Third Street Chair Brentwood., CA 94513 'APR. o^,� WaAA Count .L.J.. X✓.RLN KUNtE Subject: DEIR, Brentwood Hills Country--Club kapu Count Fuo Nmti San Francisco. Dear Mr. Jackson: Cit and County HAny C.$tin RUSINQtCLUAN This letter includes Metropolitan Transportation Commission San Maim County {MTC} staff comments on the transportation system impact TomNo " analysis in the DEIR for the Brentwood Hills Country Club JAN(SAYEt v*e-Ch.il development. The 751-acre project site is located at the Santa Clara Count southwest corner of Balfour Rd. and Concord Ave., immediatly Roo DittDON southwest of the City of Brentwood. The project would include 1622 dwelling units and 870,000 sq. ft. of commercial and 504-0 County JAMES SMINC office development. Prrt.C.Fcr Amo 1 . . Regional -Roadway impacts The traffic analysis under the AXW6461300( cumulative development scenario shows that the project would Say A+ea Goe**rrx*+4 DtwNNE McKfmt" increase traffic on regional roadways by between 1% and 10% Sl.BayCorur.ation during the P.M. peak hour and that level of service would be E or E for the roadway segments examined with or without the Delta AmcuoJ.SttACVA " Expressway. However, the DEIR notes that this analysis Tragi nd assumes considerable growth in employment in Brentwood. ' "'---'' Should this growth not occur or be delayed, impacts on regional ftmoN W.Knay U4.ovp"nell facilites could be greater due to increased outcommuting of ofTrantooKatioin Brentwood residents. We recommend that the DEIR include a WIU.i M F.°UrUIUA worst case analysis of the regional traffic impacts by assuming " -'Ol =n C that fess employment development will occur. and U&&n r* GoeDON N.MCKAY 2 The cumulative traffic impacT analysis should identify the developments included. E,«uti.�pweCx,r LAwuNeD.° 2. Recommended MitiCtatipns The DEIR notes that the City of Cvputy Eatcu6m Dwtctor 3 Brentwood does not have authority to mitigate regional WilitAm F.HuN JOSEFH P. SORT MFTROCENnIZ • 101 EirKTH STREET - OAKLAND, CA 94607-4700 - 415/464-7700 - FAX 415/464-7848 er or v M r v, u SDC � y t3 tJ t1 Zb �Y1GC3 'ra sr mus G t7 7 cS G G V i r CA tr ':3gC -VIA 0 �"r• �Lam;".. � U �.'"� +Gcd i � �^�, +.�� � G'A SZa� � '.. � "' ow ''"" •fir"'.'r '9 U_t"'s u ". '"a` r'a"'`�U,, � � '% •t� �C,J � Ga � � � c3 t"+1 r �'�'' �� � G a`s. �'' .,e;` '�' •� G � v i r✓ t" r'•� � yrs � G +�. > �00 � r� '�.� ✓ ••�J" +�J✓ es CIS e3 IA rs r v .-- - > o cs c fi 1E IZZ t. el t ;d G .. U cJ w U f r C� ca n rs < U r w V +4t L3 c'j d C3 ✓ v V {3 J t!1 el C: " ? 77 " ' 04 ✓' � r vim. � f "-� C� ±S �'� L) f � Z `�„ U � �'.. oy � tis c 7 x csZI C c� vi 4ti- r ta IP ed tA ca loo a> '� es er• � G �j '� � ��c7 � �j �. U U 3 s r U 1 :Cy t% �e. ✓ '_ N � U•C3� c3 � � 7G �CS t 1 Response 3 The project site plan shows Concord Avenue lining up directly opposite the proposed southbound off-ramp of the Delta Expressway. A traffic signal at this location was assumed and should be able to handle traffic flows. The only other potential conflict to ramps is between the Concord Avenue/Delta Expressway Southbound Off-Ramps intersection with the eastbound-southbound on-ramp. Since this will be a free-flow movement, and westbound to southbound movements will be accommodated on the loop ramp in the northwest quadrant, the close proximity of the two "intersections" should not be a problem. Response 4 City staff are working with the developers on either side of Balfour Road to ensure that adequate separation is maintained between project driveways. Response 5 Comment noted. Response 6 The analysis in the DEIR used the baseline land use forecasts used in the last administrative draft EIR for the Delta. Expressway project, plus additional assumptions regarding cumulative development in Brentwood. The effects of this on the intersection of Balfour Road with the Delta Expressway are discussed in Response 2. Response 7 Mitigation measures to encourage transit are described in the DEIR (Mitigation Measure 2 on page G-26), and the new mitigation measure discussed under Response 2 to the Metropolitan Transportation Commission. Planning for a future rail extension at this site would be premature at this point, other than to provide needed right-of-way in the Delta. Expressway corridor. Response $ Section I of the DEIR calculated the cumulative 65 dB Ldn noise exposure contours for Balfour Road and the Delta Expressway. Mitigation Measure I,l,b requires that a noise standard of 45 dB Ldn be met for noise-sensitive uses located within the 65 dB Lin noise contour. This assures adequate noise mitigation. I Michael Paoli and Associates C-47 Response 9 The DEIR assumed that Concord Avenue would be maintained across (under or over) the Delta Expressway. It is understood that this is part of the current plans for the Delta Expressway. Response 10 Comment noted. Payment of a regional mitigation fee is part of Mitigation Measure 1 on page G-25. C-48 Michael Paoli and Associates Community Contra Harvey of Bra�n pirsctor d! Community t?av+raopment Development Costa Department Courty County Administration Building 651 Fine Street 4th Floor, North Wing Martinez, California 94553.0095 Phone: ry APR 31992 (510) 646-2035 CITY C1F BRSNT't>0ot7 h►iJxi7Y 9EVELOPWHT DEPT March 31, 1992 Mr. Mark Jackson Brentwood Planning Department 708 Third Street Brentwood, CA 94513 Dear Mr. Jackson, Thank you for the opportunity to review the Draft EfR on the A.G. Sparlos Brentwood Hills Country Club project. While the DEIR has much helpful information, there are other areas which require further elaboration. Figure B-3 clearly shows that the property of the Contra Costa County Flood Control and Water Conservation District is surrounded by the p.oject proposal. The site plan on Figure B--4 shows that this proposal would place a private golf course on this publicly owned property. The DErR does not address how a privately owned golf course will integrate this public use of this land. How will the golf course effect the existing public use of this property? What liability, operation and maintenance implications does this have on flood control use of the land? On Page B-8 it states that 4 ponds along the golf course will "provide scenic enhancement to the site as well as collect storm water runoff". Will these be operated by the City or will these be integrated within the Flood control District operation? If that is the intent to utilize the District then Flood Control District minimum standards for basins need to be addressed in the Final EIR. On Page C-6, second paragraph, it states that all but 80 acres of the site are designated Agricultural I.,annds (a designation to preserve agriculture) yet the next paragraph states that this 2 project complies with the County General Plan. This is not correct. It would only be consistent if the County amended it's Plan to show this area for urbanization. The discussion on Table. C-I (Page C-12) on community size references the City policy "establish ultimate expansion levels for urban utilities . . .", but.the response to that policy does not discuss limits on those services but only discuss another growth increment. This project may not comply with that city policy'. Table C-1 on Page C-16 - 3 boundaries under discussion 3 further indicates the project is "not reasonably compact due to the extensive amount of open space ". This should trigger the need for an alternative which clustered the development and provides a buffer to new development to the west and south. Such an alternative needs to be considered for the final EIR. Jackson Letter March 31, 1992 Page Two 4 Page D-3 states a notice of non-renewal has been filed with the City of Brentwood. That must be in error since the site is in the unincorporated area. On Page D-7 under Williamson Act findings it states "that the ability to induce urban development does not appear to be substantial." With the Cowell Ranch to the south and with 5 other development proposals to the north it would appear these findings need to be restated or reanalyzed. On Page F-11 the DEIR states the site appears to be at the northern edge of the San Joaquin kit fox range and on Page F-7 it states this site is within a mile of a confirmed sighting. U.S. Fish 6 and Wildlife and California Fis;i ind Game have indicated to the County that in these cases a 3 to 1 acreage mitigation is required. - The Final EIR needs to verify with those agencies if mitigation is required. If on-site mitigation is necessary, then an alternative which provides that option should be provided. Under the rubric of Traffic and Transportation for Section r-1 of the DEIR, there are general and specific comments to this proposed development. The general comments primarily focus on the analytical approach in determining the developments's impact on the existing level of service (LOS). The approach undertaken in the analysis compares and contrasts existing conditions, currently "on the ground," and existing conditions coupled with the development's conditions. Although this approach has some degree of merit in determining the development's singular share of impacts on the surrounding transportation network, it embraces the development in a vacuum and neglects to consider the ,7 share of impact'in concert with approved developments in the Brentwood area. Referencing Page 3-6 of the Hancock Project Specific Plan1EIR Study, the DEIR stated that 2,259 housing units have been approved. Any approved projects in Brentwood coupled with the 1622 proposed housing units (1202 sf + 318 apartments, 102 townhouses), elementary school, day care center, golf course, neighborhood shopping center, and employment center should all be included in the analysis, along with the most recent CIP. Discussions with the Contra Costa Transportation Authority staff concur that developments within the 19 Contra Costa jurisdictions, exceeding 100 a.m. or p.m. peak hour trips must use the Technical Procedures published by the Transportation Authority as the frame work of analysis. Specific comments are the following: a The DEIR assumes that the 160,100 square foot neighborhood shopping center would have a pass-by rate of o and for am and p.m. respectively. According to the $ ITE Trip Generation Manual, 5th Edition, 1491, the rates range from 20%n - 65% for shopping centers-with 144,000 165,000 square feet having between 6,000 - 85,000 ADT on adjacent streets. The DEIR should substantiate the use of its pass-by rate as indicated, with respect to the pass-by rates in ITE. Jackson Letter March 31, 1992 Page Three. 0 Traffic DistributionlAssignmen t. The DEIR stated on Page G-17 that. ".Distribution of project traffic was estimated with the aid of the regional traffic model (yeas 1988) . . ." The County has undergone modeling efforts in four sub-areas, including East County -- 9 the general location of the subject EIR. The East County model for 1990 is the most current for that area, with current land use assumptions. This model should have been used for the analysis of the subject project. Substantiation is necessary for using-the 1988 outdated model. ' Q According to the interim policies established by the Board of Supervisors, December 12, 1989, regarding routes of regional significance, any development that adversely impacts identified routes of regional significance must be mitigated. The following facilities are necessary for inclusion in the analysis and mitigations to the previous LOS without project related trips: BYRON, HTGHWAY DEER VALLEY ROAD Camino Diablo Lone Tree Way SR 4 North intersection) Ballfour Road SR 4 (South intersection) Marsh Creek Hillcrest Avenue HTLLCREST AVENUE A STREET1LOi�tE TREE WAY SR 4 WB Ramps East 18th Street SR 4 EB Ramps SR.4 WB Ramps Lone Tree Way SR 4 Ela Ramps East Tregallis Tregallis James Donlon Blvd. Hillcrest Avenue STATE ROM 160 Empire Fairview Victory Highway NB Ramps O'Ha.ra Avenue Victory Highway SB Ramps SR 4 (Oakley-Brentwood) Wilbur Ave. NB Ramps Wilbur Ave. SB Ramps MARSH CREEK RD.-CAMINO DIABLO WALNT.I'T AVENUE-VASCO ROAT3 Kirker Pass Marsh Creek Road -Balfour Road Walnut Blvd. Marsh, Creek Road ' Camino Diablo Jackson Letter -.. March 31, 1992 Page Four STATERO= 4 SomersvWe Rd. EB Ramps Somersville Rd. WB Ramps Contra Loma EB Ramps Contra Loma WB Ramps Lane Tree Rd. EB Ramps Lone Tree Rd, WB Ramps Hillcrest Ave. EB Ramps Hillcrest Ave. WB Ramps STATE ROUTE 4 (Mon-Freewav) State Route 160 NB Ramps Byron Highway (South) Sycamore Avenue State Route 160 SB Ramps Second Neroly Road Dainty Big Break Road Oak Street Oakley Road Balfour Road Cypress Road Sellers Delta Road Byron Highway (North) Lone Tree Way Marsh Creek West Sand Creek The statement on G-51 that: "... there lacks an existence of mechanisms for Brentwood ..." to mitigate project impacts in neighboring or regional jurisdictions is insufficient. 0 Revisions to the site plan may be warranted that would provide a grid system of streets on the west side of the Delta Expressway for alternative north/south and east/west routes, relieving some burden on the freeway - arterial network. At a minimum, the developers should consider modifying the site plan to accommodate (or feed into) the eventual 12 e extension of Hillcrest Avenue south to Balfour. Additional consideration should be given, however, to have a grid network of minor collector streets to provide additional circulation beyond the freeway arterial network. A grid network also gives additional flexibility for providing bus transit service to the area. ti on page G-25 and G-55, regarding;project impacts and transit mitigation measures, the DEIR states that the applicant would provide "... right-of-way for bus turn outs fronting the project site on Balfour Road and ... bus shelters." This provision is insufficient 13 - because these shelters would still be beyond walking distance of residential and employment concentrations of the development site. These transit provisions, moreover, Jackson Letter March 31, 1992 Page Five should be internal to the site, (in conjunction with the previous comment above), around and near residential and commercial concentrations, thereby increasing the likelihood of transit passenger boarding/alighting within the development site. A discussion in the transportation section should include Transportation Demand Management measures, advocated by the Bay Area Air Quality Management. These discussions should also include tying into the existing bicycle path system; providing 14 bicycle racks where appropriate; and other similar measures that reduce single occupancy vehicles during peak yours in achieving 1.5 AVR. Responsibility of the latter should be identified, along with achievable goals and objectives. On Page K-1 it states the potential to get Contra Costa Water District water might be possible in the future from Las Vaqueros reservoir sources. It is my understanding that Los Vaqueros 15 Reservoir water will be limited to serving the areas within the District and within Antioch and Oakley spheres of influence and won't be available for other new areas. What source of water is proposed to be utilizers for CCWD to serve this area? 16 On Page K-3 mitigation measure. (4) on water conservation is very loosely written and needs to be made more specific to be implementable. On Page P-1 it states that fire protection response times exceed District response times. How does this relate to the City growth Management Standards and potential project approval? With the City rapidly growing, what mitigation measures can be suggested to fund an urban level paid 17 fir fighting force rather than reliance.on volunteers. Can a special fee zone be established to fund permanent staff for the proposed additional 6,800 homes being considered by the city? Mitigation Measure. on Page P-2 on financing a new fire station is too vaguely worded to assure a new fire facility. A new station and new equipment is the minimum that should be required for this project. 18 How this project meets the growth management requirements of Measure C needs to be addressed for each urban service. If I can help interpret these comments feel free to call me at (510) 646-2035. Sincerely yours, James W. Cutler Assistant Director of 'Comprehensive Planning JWC/ml L-jwc/jackson.ltr RESPONSES TO CONTRA COSTA COUNTY COMMUNITY DEVELOPMENT DEPARTMENT, JAMES W. CUTLER. LETTER DATED MARCH 31, 1992. Response I The golf course, which is an open space use, will not interfere with the flood control function of this land and the Flood Control District has not indicated any objection to golf course use of its property. In order for the project to use the Flood control District land, a lease agreement will need to be executed between the District and the Applicant. Mitigation Measure J,l,e provides that no buildings, roadways, or other structures which might interfere with the flood control function of the existing detention basins, as determined by the City and the Flood Control District, will be located in the flood control easement or basin. The Applicant will be responsible for the operation and maintenance of the golf course and the Flood Control District will have access to its land for flood-control-related operation and maintenance. Liability is not an.environmental issue and will be worked out through an agreement between the Applicant and the District. As a private golf course, the golf course water features would be operated and maintained by the Applicant. Public storm drainage would not be diverted into private ponds. If the course were to become a municipal course, the City would be responsible for the water features. Response 2 The third paragraph on page C-6 of the draft EIR does not state that the project complies with the County General Plan. It states that "an evaluation of the project's consistency with the applicable land use policies of the Contra Costa County General Plan is presented under Impact h in this section". The discussion under Impact h concludes that the project is consistent with most of the applicable land use policies of the County General Plan but is inconsistent with policies related to infilling of already developed areas, preserving and buffering of agricultural land and open space, hillsides and ridgelines, and protecting prime agricultural land. Response 3 11 .The way that the City establishes ultimate expansion levels for urban services is primarily through the establishment of Capital Improvement Financing Programs. This project has agreed to participate is such a program. The proposed project design provides substantial open space areas ranging from 200 to 400 feet in width along the southern boundary.and most of the western boundary of the site. (A substantial portion of;the western open space buffer consists of the relocated power line easement.) Additionally, three alternatives were considered in the EIR .whfich would act to buffer adjacent lard to the south and west: "Existing General C-54 Michael Paoli and Associates Plan" and "No Hillside Development and Reduced Number of Residential Units„ and "Alterative Project Location". These alternatives are discussed in Section.V` of the draft EIR. Response 4 This sentence is in error and should state that a Notice of Non-Renewal has been filed with Contra Costa County. This error is noted in the errata section of this final EIR. Response 5 As stated in Section Y of the draft EIR (Growth Inducing Impacts), the project may have a growth-inducing effect on the property to the south because the City's Sphere of Influence and corporate limits would be moved immediately adjacent to this property. As stated on pages D-7 and D-8 of the draft EIR, development of the project site could enhance the potential for urbanization of adjacent land to the south by making this property contiguous to development. However, this land is being considered for urban development as part of the City's General Plan update. Therefore, the potential for urbanization of the land to the south of the project site may be more dependent upon policy decisions to be made as part of the pending General PIan update than upon development of the project site. This land is under a Williamson Act contract, which is scheduled to expire in February 1995. Therefore, cancellation of the contract on the project site would not affect eventual cancellation of the contract on the land to the south. The land to the north of the project site (Hancock property) is the subject of its own development proposal for which a draft EIR has been prepared. This land is also being considered for potential urban development as part of the City's General Plan update. Given these factors, the policy decision as to whether the property to the north is to be designated for urban development is not dependent upon whether the proposed project is approved. Response 6 The draft EIR concluded that the impact upon the kit fox and kit fox habitat was Tess than significant. The draft EIR was distributed to the California Department of Fish and Game and no comments were received. Response 7 There are many ways to analyze a project's transportation impacts. Several months of discussions were held between the consultants and City staff regarding the most effective approach. Since there were several large projects being studied at once, it was determined that a shorter term existing plus approved projects scenario would be just as unrealistic as any other. As a result, it was decided to Michael Paoli and Associates C-55 study the effect of each project on existing conditions, and then test to make sure that the whole system, at buildout of the City, worked. Response 8 As noted in the comment, the data on pass-by traffic assumptions varies widely from location to location. It is up to the analysts to use their judgment about appropriate rates. Considering the proximity of the neighborhood shopping center to housing, the rates shown were considered conservative (i.e., on the low side). Response 9 The new traffic model referenced in this comment was not available at the time this study was done and is,still not completely developed. Response 10 Impacts.and mitigation measures for a selected group of regional roadways are discussed on pages G-49 through G-51 of the D1=IR. It was found that mitigation of these facilities would need to be a regional effort. The additional level of detail requested in this comment would not substantially change these findings. Response 11 The mechanisms to deal with regional transportation mitigation are currently under discussion by the TRANSPLAN committee through its Action Plan process. The statement on page G-51 is an accurate representation of current conditions. Response 12 The proposed project includes a centrally located golf course which, combined with the terrain, would make a grid street system impractical. Currently, no development is designated in the General Plan west or south of the project site. However, development is being considered for these areas as part of the General Plan update. The project development plan provides sufficient opportunity for potential collector street connections to the west and south should development be approved in these areas. r Response 13 Comment noted. A mitigation measure is included in the DEIR for the Applicant to coordinate with area transit agencies and the City to extend existing transit routes to the project site (Mitigation Measure G,4,b). This measure has been .revised in the final EIR to require the transit routes be extended to and within the ., project site. C-56 Michael Paoli and Associates Response 14 See Response 2 to Metropolitan Transportation Commission. - Response 15 Page K-1 of the draft EIR states that the City has entered into an agreement with the Contra Costa Nater District to obtain water from the Randall-Bold Treatment Plant. It does not mention the Las Vaqueros Reservoir. Groundwater is the,. primary source of water to be used to supply the project area. However, the ability to obtain CC'WD water provides a reliable future supply of water in addition°to groundwater. Response I6 In response to this comment, Mitigation Measure K,I,d in the draft EIR (now K,I,e in this final EIR) has been amended as follows: The Applicant shall prepare and submit to the City a detailed water conservation program for the project which shall include but not be limited to the following items: • Drought-resistant trees, shrubs, and ground cover shall be used in all areas of the project site proposed for landscaping whenever possible. A landscaping plan which delineates the types and locations of drought-resistant trees, shrubs, and ground cover shall be submitted. • Drip irrigation shall be used to the extent feasible and shall be shown on the landscaping plan. = Low-flow toilets and shower heads shall be installed in all dwelling units. • A water-management plan for the golf course shall be prepared and submitted that sets forth the water conservation techniques that will be used in the management and operation of the golf course. Response 17 The construction and staffing of a new fire station on Fairview Avenue, south of Balfour Road, is required as part of the Brentwood Lakes development immediately east of the project site. Once this station is completed, the project site would be adequately served. The new fire station is likely to be constructed prior to the beginning of construction of the proposed project, if approved. However, if Michael Paoli and Associates C-57 the fire station is for any reason not constructed in a timely manner in relation to the proposed project, Mitigation Measure P,l,a provides for appropriate fire protection facilities on the project site as determined by the East Diablo Fire Protection District. The wording of the measure is intended to allow flexibility such that a temporary fire station could be provided on the site if the planned station in the Brentwood Lakes development is delayed beyond the start of construction of the proposed project, if approved. With respect to the long-term future outlook for fire protection for the Brentwood area, this is being addressed by EDFPD Master Plan being developed by the District. Mitigation Measure P,3,a states that future development in the City of Brentwood shall be subject to the provisions and standards of the EDFPD Master Plan. Response 18 In order for the City to receive funding under the 1988 Measure C, it must have a Growth Management EIement in its General Plan. The City's current General Plan does not have such an element but one will be included in the City's updated General Plan. As such, the City has not formally adopted specific performance standards for services but does have development fees and capital improvement financing program requirements to insure the provision of adequate infrastructure and facilities for new development, including the proposed project. C-58 Michael Paoli and Associates MCCUTCHEN, DOYL.E, BROWN S. ENERSEN SAN FRANCISCO couN5ELORS AT LAW >~A swrN G'0+�. DC LOS AN('iCLC3 1331 NOPTH CALIFOPNIA BOULEVARD CA-Cl SAN JOSC POST OFFICE BOX V _ wALNUt tACCK WALNUT CFiE CK, CALIFORNIA D1596 A1ry1,,.rr0 orr,CC TELEPHONE (5iO) 937-45000 DAN0.0. FACSIMILE (510) 975-5390 March 31 , 1992 DIwCCT o!AL NU..4CA y{510) 975-5378 r VIA FACSIMILE Mark Jackson rAPR Planning Department City of Brentwood 708 - 3rd Street Brentwood, CA 94513 Draft Environmental impact Report Brentwood Hills Country Club City of Brentwood EIR File No. 90 -2 Our .File No. 72748-002 Dear Mr . Jackson: We represent A. G. Spanos Land Company in connection with the Brentwood Hills Country Club proposal currently under ccnsideration by the City of Brentwood ( "Project" ) . We have reviewed the February 1992 draft Environmental Impact Report ( "EIR" ) , and have the comments listed below. Please note that where a recommended change is made to the text of the EIR, a corresponding change may be appropriate in the EIR Summary, analyses. of Project alternatives, the relationship between short--term uses and long-term productivity/cumulative impacts, significant irreversible environmental changes , and growth-inducing impacts (Sections V, W, X and Y of the EIR) . We have tried to identify where corresponding changes will be needed. However , your consultant should run an independent check to insure internal consistency. Y . GSL COMMENTS Comment 1 : The applicant ' s name, A. G. Spanos, has been deleted from the name of the project . The current name is ........... ....... ...... ................. ............. Mark Jackson March 31 , 1992 Page 2 "Brentwood Hills Country Club. " The words _EIR' s references to the Project Name should be modified accordingly. Comm-ent 2: The EIR indicates on pages A-5 , A-14 , A-53 , C-11 , F-10 through F-11 , V-6 , V-8 , V-9 , V-11 , V-13 , and X-1 , that the Project ' s impacts on oak trees will be significant and unavoidable . This assessment overstates the level of the impact after the implementation of mitigation measures . The Project calls for the removal of 21 oak trees, which will be replaced at a ratio of 3 : 1 . This high ratio of replacement with healthy young trees will more than offset the loss of food, shelter, roots and nest sites associated with mature oaks . See Comments 35 and 36 . The EIR should be , modified to reflect that the Project ' s impact on oak trees is significant, but will be reduced to insignificance through the imposition of these measures . Comment 3 : The EIR indicates on pages A-5, A-16, A-53 , C-11 , C-18 , T-1 through T-2, V-6, V-8 , V-9 , V-11 , V-13 , and X-1 , that the Project will have a significant and unavoidable visual impact because of the proposed alteration of the Project site. This characterization should be expanded as 3 indicated below in the section-by-section analysis to reflect that the characterization of a visual change as adverse or beneficial is a subjective issue. See particularly Comments 45 and 46 . Ultimately, only the City Council , as lead agency, can determine whether to characterize a visual change as significantly adverse, insignificantly advetse, , beneficial or neutral. . SECTION-BY-SECTION ANALYSIw Section A: Summary. Comment 4 (Page A-4 ) : The significance of the potential inconsistencies with the Brentwood General Plan land use policies relating to purported significant and unavoidable ,.. impacts from the loss and endangerment of oak trees and the alteration of hill topography is overstated. The loss and endangerment of oak trees is a mitigable impact, and the significance of the alteration of hill topography is subjective, as explained in Comments 2, 3, 35, 36, 45 and 46. Accordingly, the following text should be addedafterthe discussion of Impact 6: " (not potentially significant) . " The discussion under the heading "Reducible To -- --_ fT�significance" should be replaced by the following text : Mark Jackson March 31 , 1992 Page 3 f The mitigation measures described in Sections P and N will reduce to insignificance the impacts related to oak i trees and potential hazards . The mitigation measures described in Section T will insure that the project is an aesthetically , pleasing development , thus it may be determined that the residual visual impact is insignificant . However , this is a subjective issue, and some may find the change to the existing vistas both significant and adverse even after the imposition of mitigation measures . Lastly, it should be noted that inconsistencies with general plans or other land use regulations are not in themselves environmental impacts, but are rather legal and policy considerations .: Comment 5 (Page A-5) : As. discussed in further detail in Comment 25, "the mitigation measures. relating to the elementary school site should be expanded. The elementary school site is not a significant impact . Accordingly, the following should be added to the end of the description of Impact 5 : " (not potentially significant) . " 5 The first sentence of the discussion of Mitigation Measure 5 should be replaced with the following text : None required. However , if access to the current site cannot be secured, the school site could be moved to a location that is wholly accessible within the Spanos site. Comment 6 (Page A-6) : As explained in Comment 41 , Mitigation Measure 3(f) should be replaced by the following: Access for maintenance of the towers and conductors shall be provided. Measure 3(g) should be replaced by the following: Protection for tower footings shall be provided. 7Comment 7 (Page A-10) : In Mitigation Measure 5(a) , line 5, the EIR should state that cut material will be taken ..............................................-.................... Mark Jackson March 31 , 1992 Page 4 from within the Project site, rather than from the tops of ridges . Comment 8 (Page A-14 ) : As discussed in Comment 2, the project ' s impacts relating to oak trees are reducible to insignificance by the imposition of the mitigation measures described in the EIR. Accordingly, the "no" under the heading reducible to insignificance" should be changed to a "yes . " Comment 9 According to the text of the EIR, the lack of a second access to the country club does not require mitigation measures. See pages G-22 through G-23 . Accordingly, the following text should be added to the discussion of Impact 2 : ( lack of emergency access to the country club is not considered potentially significant) . Comment 10 (Page A-24 ) : Mitigation Measure 1(a) 10 should reflect that the sound wall will be located 60 feet fror, the roadway center line. Comment 11 (Page A-29) : Mitigation Measure 1(a) indicates that two new water reservoirs will be constructed, which maybe more than required. Accordingly, the words "two 11 new water storage reservoirs" in the first bullet of the mitigation measure should be replaced with the words "at least one new water storage reservoir . " Comment 12 (Page A-30) : With respect to Mitigation Measure 1( a) , fourth bullet, the size of pipelines needed to extend the distribution system has not been determined. Accordingly, the words "24-inch" should be deleted. The language of the next bullet should be replaced by the following item: Participation in a city-wide fee for connecting the City' s water system to the 12 Randall-Bold Treatment Plant if necessary. Mitigation Measure 1(c) should be rewritten to read as follows : A new distribution conduit will be installed as required by the ECCID to replace the Mark Jackson March 31 , 1992 pacre 5 .. existing concrete ditch which now forms the _ eastern boundary of the Spanos site . Comment 13 (page A-31) : There is a typographical 13 error in the last sentence of Mitigation Measure 3 , „structure is misspelled. Comment 14 (page A-32) : There is a typographical 14 error in the discussion of Mitigation Measure 3 . "Structure" is misspelled. Comment 15 (Page A-37) : Mitigation Measure (a) should 15 be revised to provide that the pipelines shall be rerouted to minimize passage under residential lots or paved street rights—of—way in residential areas . Comment 16 (Page A-41) : In Mitigation Measure 1(c) , fourth line from the bottom; the following text should be 16 inserted after the words "community facilities district„ : "or other appropriate funding vehicles" . Comment 17 (Page A-46) : As explained in Comment 3 and Comments 43 and 44 , the significant and unavoidable character of the project ' s impact on scenic vistas cannot be determined in the EIR. Accordingly, the word "no" under the heading 17 "Reducible to Insignificance" should be replaced with the following language: This is a subjective question that must' be answered by the City Council as lead agency. Comment 18 (page A-47) : The impacts of cumulative development are similarly subjective. Accordingly, the. "n©" under the heading "reducible to insignificance" should be 18 replaced with the following language: This is a subjective question that must be determined by the City Council as lead agency. Comment 19 (page A-53) : Under the heading of Fsignificant' and unavoidable impacts , " the impact on oak trees should be deleted. ; As explained in Comments 2 , 35 and 36 , this 19 impact can be reduced to insignificance. The visual impact should be moved from the significant and unavoidable category down to the next category, "Unresolved Or Controversial Issues . " As explained in Comments 3 , 45 and 46 , the nature of .............. ......-...... .........-..... Mark Jackson March 31 , 1992 Page 6 this impact is subjective . The reference to the loss of the Brentwood Coal Mine site should be deleted, for the reasons explained in Comment 47; there is no substantial basis for concluding that the loss of this site would be significant . Comment 20 (Page A-55) : The EIR characterizes the No Hillside Development and Reduced Number of Residential F Units alternative as able to attain the- basic objectives of the project . This is inconsistent with the description of the alternative beginning on page V-8, which indicates that this alternative would accommodate at most 866 single-family units, 756 units less than the Project. To reflect this difference, the following text should be substituted for the first sentence of the first full paragraph: 20 Of the first three alternatives, only the No Hillside illside Development and Reduced Number of Residential Units . alternative involves a development of thL, basic scope and nature as the proposed Project . However, this alternative reduces project impacts only at the sacrifice of at least 336 single-family units . One variation of this alternative also sacrifices the golf course. Section C: Land Use. Comment 21 (Page C-:1 ) : The third full paragraph should be replaced with the following text : The City of Brentwood is currently updating its General Plan. The updated General Plan 21 will provide for growth within the Brentwood planning. area up to the year 2020. The- population projections for this period are L between 73 , 000 and 107, 000 . Comment 22 (C-4) : The first sentence of the second . paragraph under the heading "surrounding land uses" should be 22 replaced by the following text : "The nearest urban development, the Apple Hill Project, is about one-quarter mile away. .. Comment 23 (Page C-6) : The following sentence should 23 be added to the second full paragraph: "The Project is within the County' s Urban Limit Line . " Mark Jackson March 31 , 1992 Page 7 Comment 24 (Page C-7) : The following sentence should be added to the paragraph which ends at the trip of page C-7 : The significance of this increase must be evaluated in light of the anticipated 24 cumulative growth in the Brentwood area to between 73 ,000 and 107 ,000 by the year 2020 . Even under ABAG' s conservative 1989 projections , the City' s population is expected to increase by 344 percent by the year 2005 . Comment 25 (Partes C--9 through C-11) : ' -11) : . The location of the school site will only pose a problem if the access thereto c&nnot be obtained. Accordingly, the mitigation measure for 25 Impact e should be expanded to 'recommend as an alternative requirement that, prior to commencing construction, the applicant demonstrate the ability to provide- access to the currently proposed site. Comment 26 (Page C-10 ) : The following sentence should be added to the first full paragraph: 26 The visual significance of the loss of the j hill is a subjective issue to be resolved by J the City Council as lead agency. Comment 27 (Page C-11 ) : The EIR concludes that there is a significant and unavoidable impact relating to consistency with the Brentwood General Plan, because of the Project ' s impacts on oak trees and hill topography. However, as explained in Comments 2, 3 , 34 , 35, 43 and 44 , these impacts are not significant and unavoidable. Accordingly, the discussion under the heading "Level of Significance" should be replaced by the following text : The Project ' s impact on oak .trees will be 27 lessened to a level of insignificance by the mitigation measures recommended in Section F. The potential hazards related to the Project will be reduced to insignificance by the mitigation measures recommended in Section N. The mitigation measures recommended for the alteration of hill topography will substantially reduce visual impacts . Whether the remaining visual impact will be both significant and ..............-.........-.... ................. ...... Mark Jackson March 31 , 1992 Page 8 adverse is a subjective question. The project will be carefully designed with respect to visual effect, and many viewers will find it aesthetically pleasing. Nevertheless , the change may be considered a 27 significant and unavoidable impact to persons who enjoy the current view, Ultimately, the significance and adverse character of this change must be decided by L the City Council as lead agency. Ccrxnent 28 (Page C-18) : The discussion of Residential Policy I should be replaced with the following text : The project will result in the removal and potential endangerment of oak trees . The loss will be mitigated to insignificance by replacement at a ratio of 3 to 1 . Threatened trees will be protected by the measures described in Section F. The potential hazards related to the project 28 will be mitigated to insignificance by the measures described in Section N. The effect of the alterations to the topography of the hills is a subjective issue and some may consider the change a significant and an /. unavoidable visual impact. However, the mitigation measures described in Section T will insure the creation of an attractively designed project , which many will find L visually pleasing. Comment 29 (Page C-19) : The EIR indicates that there is a possible inconsistency with Objective 5 .3 of the preliminary Land Use Element of the updated General Plan. This conclusion is based on the Project ' s impact on oak trees and visual resources . As explained in Comments 2, 35 and 36, the .,oak tree impact will not be significant after the imposition of .,. mitigation measures . As explained in Comments 3, 45and46 , the significant and adverse character of the Project ' s visual 29 impacts is a subjective issue. Accordingly, the last paragraph of the discussion of Impact q should be replaced with the following text: The loss' and potential endangerment of oak trees on the project site will be reduced to insignificance by the imposition of Mark Jackson March 31 , 1992 Page 9 mitigation measures recommended in Section F. The mitigation measures recommended in Section T will substantially reduce the project ' s visual impact ' associated with the alterations to the hilltop areas . However , whether this impact 29 will remain significant and adverse is a y subjective issue, to be decided by the City Council as lead agency. In this context , it should also be noted that the goals and objectives in the General Plan are policy guidelines, rather than strict and specific Drohibitions or mandates . The extent to which any development proposal furthers or is inconsistent with a goal or objective is a policy decision, thus within the L jurisdiction of the City Council . Comment 30 (Page C-21 ) : The following sentence should be added to the second paragraph of the discussion of 30 Policy 3-12 : "The significant and adverse character of this change is a subjective issue, thus must be determined by- the City Council as lead agency. " Comment 31 (Page C-24 ) : The City' s CIFP program promotes the planning goals of Government Code section 55377 by providing for the creation and improvement of infrastructure to accommodate anticipated growth. Accordingly, the discussion of the project ' s consistency with Government Code section 56377(b) should be clarified by replacing the paragraph which begins at the bottom of the page and continues at the top of page C-25 with the following text: In certain respects , the proposed Project may appear inconsistent with Section 56377(b) . The policy directs LAFCO 31 to encourage development of existing open space land for non open space uses that is outside existing City limits and for the most part outside the City' s sphere of influence. However , the City requires that all projects of this nature participate in a capital improvement financing program ( „CIFP" ) . These programs effectively provide for the phasing of development as necessary for its services or financed E unable to be provided. This project is Mark Jackson March 31, 1992 Page 10 within CIFP 91-1 , which is the third CIFP to be established. The projects within the first and second CIFPs are within the City limits and will likely be constructed prior 31 to those projects in the third CIFP. The CIFP requirement thus encourages the development of Land within the existing City limits and sphere of influence prior to development of lands lying outside. Section D: Agricultural .Resources. Comment 32 (Page D-6) : The last sentence of the discussion of finding A should be replaced with the following text : The updated General Plan is intended to 32 provided for growth within the Brentwood planning area to the year 2020, and estimates an ultimate buildout population of between 73, 000 and 107,000 . If these projections are accurate, the project will be required to fulfill housing needs in the Brentwood area. Comment 3 (Pages D-9 through D-10) : The DEIR concludes that the economic loss of agricultural products produced on the site is 'a significant and unavoidable impact . The lost value is estimated to be X143 , 484 . The EIR does not consider the economic value that will result from the develonment of the project, which more than outweigh this amount . The Project will result in the creation of 33 1,622 homes, as well as office and commercial space, a golf course and other amenities . At present, the price of a new home in a standard subdivision in the area ( i .e. , a development . without substantial amenities) is in the mid-$100 ,000s . The Project ' s units will be more valuable than this because of the Project 's amenities and commercial component. Based on the foregoing facts, the EIR should reflect that the Project will result in a' net economic benefit . Comment 34 (Passe D-12) : The EIR concludes that there 34, will be significant cumulative impacts from the conversion of Mark Jackson March 31 , 1992 Page 11 agricultural lands . This should be expanded by substituting the following text for the discussion of Impact a : Full development of the Brentwood General Plan and the projects considered in the cumulative analysis would result in the development of about 9 , 800 acres, a substantial portion of which is used for agricultural purposes and designated as 34 prime farmland on the Contra Costa County Important Farmland Series Map (Department of e Conservation, 1990) . This is considered to be a significant unavoidable adverse impact . However, the Project itself entails the conversion of only 693 acres of grazing land, i . e. , non--prime land, and 58 acres of prime farmland. Accordingly, the Project ' s • incremental contribution to the cumulative impact is relatively small . The cumulative conversion of agricultural land to urban uses would remain a significant impact with or without the Project . Section F: Biological Resources. Comment 35 (Pages F-10 through F-11) : As noted in the EIR, the project involves the removal of 21 oak trees . Fifty-four additional oak trees will be incorporated into residential lots and streets; the EIR classifies these 54 trees as "endangered. " Contrary to the representations of the EIR, it is possible to mitigate the potential impact upon trees to insignificance . The planting of three trees for each one 35 removed will avoid or reduce to insignificance the diminished amount of food, shelter, roots and nest sites represented by the oaks . The 54 trees that are characterized as endangered will be protected by mitigation measures {1} through (3) , described on page F--10 . See attached letter from James Gibson of Huffman & Associates . Accordingly, the discussion under the heading "level of significance" on page F-11 should be replaced with the following text: The above mitigation measures will reduce the impact to a level of insignificance. Comment 36 (Page F--13 ) : The EIR concludes that the 36 ' cumulative impact on the loss of biotic resources will be significant and unavoidable, because of the conversion of ................. ....... .................................... .......................... Mark Jackson March 31 , 1992 Page 12 9 , 800 acres of 4 mostly agricultural or open space to urban development . The Project represents only 751 acres of this 9 , 800-acre total . Accordingly, the following text should be added to the discussion of impact A: It should be noted that the project 36 currently under consideration involves only 751 acres, a small increment of the 9 ,800 acres that will ultimately be converted to urban development . . Accordingly, this cumulative impact will be significant whether or not the project is approved. Section G: Traffic and Transportation. Comment 37 (Paces G-49 through G-51) : The EIR indicates that cumulative development will significantly impact regional roadways . According to Table G-10, the Project will contribute only a small component of anticipated cumulative traffic increases . Accordingly, the following languageshould be added to the end of the discussion of impact B at the top 044 page G-51 : As illustrated in Table G-10, the project is 37 expected to contribute as little as j-1 percent, and no more than 8 percent to cumulative traffic on regional highways . Accordingly, this cumulative impact will be significant whether or not the project is developed. Section K: Water Supply. Comment 38 (Paqe K-3) : The number of water storage F facilities required by the Project cannot be determined at this time. This issue will be determined through the CIFP. -Accordingly, the words "two reservoirs" in the first bullet of . Mitigation Measure ( 1) should be changed to "at least one reservoir" . 38 The size of pipeline needed to extend the Balfour Road main distribution system is also unknown, thus, the words "24-inch" should be del:eted from'-the second bullet of the mitigation measure. Lastly, Mitigation Measure (3) should be revised as follows : Mark Jackson March 31 , 1992 Page 13 _ A new distribution conduit will be installed as required by the ECCID to replace the existing concrete ditch which now farms the eastern boundary of the Spanos site. Section N: Hazardous Conditions . Comment 39 (Page N-1) : The first paragraph of the discussion of electric transmission lines overstates the number 39 of lines crossing the Project . There is only one set of 230 kilowatt electric transmission lines . Comment 40 (Page N-9) : . Mitigation Measure ( 6) . and ( 7) go beyond the needs of the Project . Measure (6) should be replaced with the following: Access for maintenance of the towers and 40 conductors shall be provided. Measure (7) should be replaced with the following: Protection for tower footings shall be provided . Comment 41 (Page N-10 ) : The discussion of Mitigation Measure ( 1) should be clarified to read as follows : Re-route the PG&E/StanPac and Chevron �1 pipelines so as to minimize placement ,of pipes under residential lets or paved street rights-of-way in residential areas (perpendicular crossing of streets is preferable) . Section P: Fire Protection and Ernergency Services. _Comment 42 (Page P-3) : As 'noted in Comment 32, the amount of reservoir storage that will be required to serve the project is not known at this time. This amount will be determined through the CIFP process . Accordingly, the sentence under the heading "Level of Significance" should be revised to 42 read as follows: This impact is not considered to be potentially significant as Long as the mitigation measures in Section K, which would provide for one or more higher ................................................................... ................................................. Mark Jackson March 31 , 1992 Page 14 elevation water storage reservoirs rs to serve the project area, are implemented. Section R: Parks and Recreation. Comment 43 (Page R-3 ) : The reference to the Quimby 43 Act in the discussion of the mitigation measure for Impact A should include the legal citation for 'IV-,,he Act, Goverment Code Section 66577 . Comment 44 (Page R-4 ) : The discussion of Mitigation Measure ( 1) should be clarified as follows: The City of Brentwood shall continue to require park dedications and/or fees as a 44 condition of developmental approvals, as authorized by the Quimby Act, Goverment L Code Section 66477 . Section T: Aesthetics and views . Comment 45 (Page T-2) : The project involves the. development of some low-lying hillsides . However, the dominant F visual features, Mount Diablo and other major ridges to the west, will not be affected and will visually dwarf the develo'Dment . Further, as no-Led in Comment 3, the question of whether the project will have a significant and unavoidable adverse visual impact is a decision to be made by the City Council as lead agency. Accordingly, the discussion under the heading "Level of Significance" should be expanded as follows : The design measures incorporated in the project Master Plan and Grading Plan will 45 ensure the development of an attractive, open environment . The predominant visual features, the view of Mount Diablo and other ridges to the west , will not be affected by the project . However , the project will entail an irreversible and substantial change in the visual character of the site, resulting from the conversion of the site from open space to urban uses, and the alterations to hillsides and ridge tops . The adverse nature of this change is a subjective issue. Many viewers may find that the new character of the site, although changed, is substantially as attractive as Mark Jackson March 31 , 1992 Page 15 before . To others, the change may be considered a significant adverse impact .notwithstanding the implementation of the mitigation measures . As lead agency, the City Council must determined whether this impact is considered significant and adverse after mitigation. 3 Comment 46 (Page T-5) : The significant and adverse character of the visual impact of cumulative development is similarly subjective . Accordingly, the discussion under the heading "Level of Significance" should be revised to read as follows : Appropriate design measures incorporated in individual projects should result in the development of an attractive urban 46 environment . Many viewers may find this environment as attractive, although different , as before the develonment .. However , others may find the change to the existing scene is significantly and unavoidably adverse. As this is a subjective matter, the significant and adverse character of the alteration of the 1 project site is for the determination of the City Council as lead agency. Section U: Cultural Resources. Comment 47 (Pages U-1 through U-13) : The EIR concludes that loss or damage to the Brentwood Coal Mine site would be a significant impact . One basis for this conclusion is that the engine platform is the last surviving resource of its type . This is inconsistent with the text of the EIR. on pages U-4 through U-5, which note that there are similar structures at Somerville and Nortonville. Accordingly, the EIR should clarify that the removal of the platform would not mean the loss of a unique artifact . 47 Another basis for the conclusion of significance is. the association of the mine with the founding of Brentwood. The site was part of the Rancho de los Meganos , the northwest corner of which was sold to become the original town site . However , the mere fact that this site and the coal mine town site were at one time owned by the same person does not indicate that the mine itself was critical to the town ' s ...................-........... ............. ......-...... ...... Mark Jackson March 31 , 1992 Page 16 founding. The principal mine in the region, the Black Diamond Mines , is already preserved in a National Register historic district . 47 Given that the"most important mine in the vicinity is preserved, there is little or no basis to conclude that the remaining artifacts from the Brentwood mine are of significant importance. Accordingly, we recommend that the text under the heading "Level of Significance" on page U-13 be revised to read as follows) : "This impact is not considered significant. " The last sentence under the discussion of Impact A on page U-11 should be deleted. Section V: Alternatives to the Prop - �osed Projtqt . Comment 48 (Page .V-5) : To clarify the Project ' s relationship to existing utilities and infrastructure, the F following text should be substituted for the last sentence of the sixth bullet : 48 The project site is close to areas currently served by utilities and other infrastructure. Accordingly, development of this site will entail a logical extension of those utilities and infrastructure . . Section Y: Growth-Inducing Impacts . Comment 49 (P4cie Y-1 ) : The last sentence under the leading "Public Land Use Policy Considerations" should be 49 clarified to read as follows : "The Project site does, however , abut the city limits along a portion of its northeastern boundaries . " Appendix 2: Sources Consulted. 50 Comment 50: The bibliography should include Land .Manning Consultants, Brentwood Unified School District, and A.G. Soanos Land Development Company. Mark Jackson March 31 , 1992 Page 17 Thank you for the opportunity to comment or. this draft EIR. If you have any questions , please do not hesitate to call Daniel J. Curtin, Jr . or me . Very truly yours , McCUTCHEN, DOYLE, BROWN & ENERSEN By Ann R. Danforth 5097g Enclosures cc : James panagopoulos (by facsimile) Donn C. Reiners William Barbour (by facsimile) James Stedman Daniel J. Curtin, Jr . 1 ti ............... ................ ................ fM-FFM--',,-N & ASSOCLALTES, LNG Wetlan& Rev?tory CazsulLT= C-x 96rs 63 .24a(54 Y.P—rch 20, m.r. ri= A, G. Spa= 134-i West Robinwood DdVa stock-xr. C.Piffo.-niz 95207 Subject= Draft F=vjro=e.=taJ Im-pad Report :Breatwcod MDs Country Com, Bre=twoocl, Cafforxda Dc2,-Mr. P—z--X-ZOp-Ou-1OS: I hzve reg-iewed tL,_- sectioa of tht ER ad&ress�gr iTapa-c.-s a2d r-mitisat- oal At your itq=.st, to cal- -.tc:s on the project sitr-- .dgzEoa =ersuz--z Lde-itilded in the MR, induding Or 0 Oa a tbz-- to -e2suras C�a- 4 ltd xazio (5- or 15- tetra. cort=- =stock), 0 lczd z-aczciez. I bz-,;,-- this =t=zat on =Y C;"'7 zrd County m wb:C7 agir- r, --ci have zo-arnvcd development projects sucil-miti--,='o- If You have zny v�don-s, pleas- coa=t=I-- at (916) 732-2050- S i'l=-rl 7, Tames C. Grosm Senior Vice P.-esidcat Huffirnan Asss-xiates, Inc. YCG:bjs L-i—,- CX--,-sa;ft I x L=i�.CA 4-(' S (:Is) ca--)47:�-=6 5,469 23-d-P=KL.N--i' RESPONSES TO McCUTCHEN, DOYLE, BROWN & ENERSEN, ANN R. DANFORTH. LETTER DATED MARCH 31, 199?. - Response 1 Comment noted. The Applicant's name has been deleted from the project name. Response 2 .r City staff has taken the position that the project's impacts on oak trees can be mitigated to a less than significant level if Mitigation Measures F,I,a through F,I,e are adopted and provided each oak tree removed is replaced with a 4$-inch box blue oak tree with a canopy width of 7-8 feet and a height of 14-16 feet at locations to be approved by the City. Mitigation Measure F,I,f has, therefore, been added to this final EIR requiring the 48-inch box trees. Response 3 The draft EIR states clearly in Section T, page T-1, that aesthetics/visual impacts is a subjective issue. The Planning Commission and City Council are currently developing hillside grading standards for development in the hills west of Brentwood. These standards, once developed, would be incorporated into the PD regulations for the project site. The standards will reflect the aesthetic standards of the community and, therefore, once applied to the project would Iessen the potential visual/aesthetic impact related to hillside development to a level of insignificance. Mitigation Measure T,I ,c reflecting the development and application of hillside grading standards has been added to the summary section of this final EIR. Response 4 With the addition of Mitigation Measures F,I,f and T,I,c, the loss and endangerment of oak trees and the alteration of hillside topography can be mitigated to a less than significant level. Section 15125 of the State CEQA Guidelines states that an EIR "shall discuss any inconsistencies between the proposed project and applicable general plans and regional plans". Appendix G of the Guidelines states that a project will normally have a significant effect on the environment if it will "Conflict with adopted environmental plans and goals of the community where it is located." Response 5 Based upon the discussion on pages C-9 through C-1 I of the draft EIR, the location of the elementary school site is a potentially significant impact. Based Michael Paoli and Associates C-77 ...................... ............... .......................... ............. upon response letters from the Brentwood Union School District, Mitigation Measures 5,a through 5,d have been added to this final EIR. Response 6 Mitigation Measure N,3,f has been reworded in the final EIR as follows: Access for maintenance of the towers and conductors shall be provided in accordance with Public Utilities Commission and PG&E requirements. Mitigation MeAsure.N,3,cy has also been modified as follows: Protection for tower footings shall be provided in accordance with Public Utilities Commission and PG&E requirements. Response 7 Substantial grading of the hilltop areas is proposed. Therefore, it is likely that if cut materials are used to stabilize slopes, some will originate from these hilltop areas. Response 8 With the addition of Mitigation Measure F,I,e (see Response 2), the "no" under the heading "Reducible to Insignificance" has been changed to a "yes" in this final EIR. Response 9 The suggested text has been added to Impact G,2 in this final EIR. Response 10 Seventy feet from the roadway centerline is the correct distance for the sound wall. However, any residential structure would need to be 20 feet from the sound wall, phich would place the residential structure 90 feet from the roadway centerline. ."Mitigation Measure 1,1,a has been modified accordingly in this final EIR. Response I I The City Public Works Department has indicated that two new water storage reservoirs are needed. (Refer also to Response 2 to City of Brentwood Public Works Memorandum dated March 31, 1992.) C-78 Michael Paoli and Associates Response 12 Regarding the fourth and fifth bullets under Mitigation Measure KK,I,a, the Public Works Department did not take exception with the wording of these items in its comments on the draft EIR. For Mitigation Measure K,l,e in the draft EIR (which has been renumbered to Mitigation Measure K,I,d in this final EIR), the words "westerly on Balfour Road„ have been replaced by "as required by ECOID". J. Response 13 This has been corrected in this final EIR and is noted in the errata section of this document. Response 14 This has been corrected in this final EIR and is noted in the errata section of this document. Response 15 City staff concurs with the wording of Mitigation Measure N,4,a with the addition of language as noted in Response 7 to the Brentwood Public Works Department Memorandum dated March 31, 1992. Response 16 Since Mitigation Measure Q,l ,c is structured around the establishment of a Community Facilities District, adding the language "or other appropriate funding vehicles" appears inappropriate. 1 Response 17 See Response 3. Response 18 See Response 3. Response 19 The impact on oak trees has been deleted as a significant unavoidable impact with the addition of Mitigation Measure F,I,e (see Response 2). The aesthetic/visual impact item has not been removed as a significant unavoidable impact (see i Response 3). The loss of the coal mine has been removed from the list of Michael Paoli and Associates C_79 significant unavoidable impacts---not because its loss would not be significant, but because its loss is not unavoidable with the implementation of Mitigation Measures U,l,a through U,l,d (see Response 47). Response 20 The No Hillside Development and Reduced Number of Dwelling Units alternative would allow for 866 single family units on the Spanos-owned portion of the project site as opposed to the 1,051 single family units proposed for the Spanos- owned portion of the site under the proposed project. This amounts to a difference of 185 single family units. The PEC area designated in the General Plan for the northeast corner of.the site was assumed to include 353 multiple family units. Therefore, the total number of units included in Variation A of this alternative is 1,219, as opposed to 1,622 for the proposed project. This is a reduction of 402 units and not 756 units as stated in the comment. In order to clarify the number of units allowed by this alternative, additional explanatory text has been added to the bulleted description of the alternative in the summary. Response 21 No changes to this text are considered to be necessary because it reflects Goal 1 and Objective 1.1 of the preliminary General Plan update Iand use element (see Appendix C-1 of the draft EIR). Response 22 According to.City staff, the Apple Hill development is one-half mile from the project site. Response 23 The project site is within the County's Urban Limit Line. This is stated on page Y-2 of the draft EIR. Response 24 The text of the subject paragraph is accurate and appropriate as printed and does ..not require any qualification. The potential buildout population of the General Plan update is previously mentioned on page C-1. Response 25 See Response 5. C_gp Michael Paoli and Associates Response 26 See Response 3. Response 27 See Response 4. Response 28 s No changes to the discussion of Residential Policy I on page C-IS are necessary. However, with the addition of Mitigation Measures F,l,f and T,I,c related to oak trees and the alteration of hill topography, the impacts causing the project to be potentially inconsistent with the General Plan policy can be reduced to a level of insignificance. Inconsistency with the policy is, therefore, not considered to be a significant unavoidable impact and the IIR summary has been changed accordingly. Response 29 Due to the potential loss and potential endangerment of oak trees on the project site and the substantial development and grading of the hilltop areas, the project was considered to be potentially inconsistent with objective 5.3. However, with the addition of Mitigation Measures F,I,f and T,I,c and since the Brentwood General Plan update is preliminary and unadopted, this impact is not considered significant. Response 30 See Response 3. Response 31 The text in question accurately and adequately describes the relationship of the project to Government Code Section 56377(b). Response 32 The following sentence can be added to the subject paragraph: In order for the City of Brentwood to reach a population of between 73,000 and 107,000, it is likely that the project would be built. Michael Paoli and Associates C-8I Response 33 The purpose of Section D in the draft EIR is to evaluate the project's impacts on agricultural resources and not to conduct an overall cost-benefit analysis of the project. Development of the project will result in a net loss in agricultural production in Contra Costa County and in the economic value of this production. Response 34 The suggested text understates the incremental impact of the project. While the cumulative conversion of agricultural land would remain significant without the project, the proposed project, with 751 acres, involves a considerable amount of land and, on an incremental basis, adds significantly to this impact. Response 35 See Response 2. Response 36 The suggested text understates the incremental impact of the project. While the cumulative loss of biotic resources would remain significant without the project, the proposed project, with 751 acres, involves a considerable amount of land and, on an incremental basis, adds significantly to this impact. Response 37 The suggested text understates the incremental impact of the project. While the cumulative traffic impact on regional roadways would remain significant without the project, the proposed project would contribute up to 8 percent additional traffic on the roadways, which adds significantly to the cumulative conditions. Response 38 See Responses 1 I and 12. Response 39 According to PG&E, there is one line of towers on the project site carrying 230 kV on each of two circuits. Each circuit is composed on three wires. Therefore, the towers carry two sets of wires and each set carries 230 M Response 40 ;. -See Response 6. C-82 Michael Paoli and Associates -_ ___ - Response 41 See Response 15. Response 42 See Response 1 I. Response 43 3 The reference to .Section 66577 is noted and has been added to Mitigation Measure R,2,a in the summary section of this final EIR. Response 44 See Response 43. Response 45 See Response 3. It is noted that the major ridges and Mount Diablo are significant visual features in the area. However, the lower-lying hillsides on the project site are also visually very evident from Brentwood and the surrounding area, and the alterations that will occur to these hills with development of the project will also be very evident. Response 46 See Response 3. Response 47 No comparable resources were identified in Contra Costa County or California during the consultation and historical research process. The partial remains of a sandstone engine platform and a collapsed red brick engine platform in the Black .Diamond Mines District were cited as the only known resources of this type. The Brentwood Mine engine platform is the last surviving and best example of its type based on this research. Its integrity, workmanship, materials, and associated mine shaft features and artifacts contribute to the importance of the historic coal mining theme identified as nationally important by the acceptance of the Black Diamond Mines District. In '1871, James T. Sanford purchased the 13,316-acre land grant called Rancho Los Meganos established by pioneer John Marsh in 1937. The Brentwood Coal Company was formed by a group of investors a year after the property was purchased. Expensive improvements at the mine indicate that coal was the primary investment opportunity on the property. Sanford sold the northeast corner Michael Paoli and Associates C-83 of the huge estate to the San Pablo and Tulare Railroad Company in 1877. This became the townsite for the City of Brentwood. The importance of the coal industry to the development of the area is recognized in the historical literature, and by the current President and Board of Directors of the East Contra Costa Historical Society (Sherfy, pees. comm., 1992). Coal minim attracted settlers to the area and led to the development of the railroads and nearby towns. The Black Diamond Mines District contains an estimated four-fifths of the largest coal mining area in California. over the years, fires, resettlement, sand minim, ranching activities, and vandalism have destroyed most of the buildings and structures associated with the mines and mining towns in this area. According to the National Register nomination for the district, "most of the district's [extant] features are underground, in the form of mining excavations" (Praetzellis, 1989). As visible, above ground coal mining structures, the Brentwood site's engine platform with its sandstone masonry, anchor bolts, and associated Cornish pump foundation, are important resources that contribute to the National Register coal mining theme. The recently vandalized round sandstone feature adjacent to the engine platform may have been a foundation for the engine smoke stack. Subsurface archaeological resources on the site, including structural features in the mine shaft and domestic artifactual remains, may provide important information about how the mine was constructed and who worked there. Considering the relatively undisturbed condition of the mine site and its potential contribution to the social history of East Contra Costa County, loss of this resource would be a significant adverse impact as defined by Appendix K of the California Environmental Quality Act Guidelines. Response 48 t. The purpose of the sixth bullet is to indicate that the City has identified the site for potential future annexation and in order to annex the site, extension of urban services to the site should be feasible. Any further modification to the text is unnecessary. Response 49 Clarification noted. r .'Response 50 The Brentwood Union School District and Land Planning Consultants are already listed under Schools in Appendix 2. The A. G. Spanos Land Development Company should,have been included in the Sources Consulted and is so noted in the errata section of this final EIR. C_84 Michael Paoli and Associates MCCU'f CHEN, DOYL,E, BROWN & BNBRSEN SAN rXIANCISCO COUNSELORS AT LAW w43x.INGT LOS ANCrLES 1331 NORTH CALIFORNIA 8oyLEVAR0 SAN JOSE POST OFFICE Box v WALNUT +rrlL l+fCa'j orr,Cr WALNUT CREEK CREEK, CALICO RNIA 9aSG16 TELEPHONE (SIC) 437.6000 ft•r.KO. FACSIMILE (510) 975.5390 April 7 , 1992 DIRECT W.L V_&C" HAND DELIVERED Planning Commission City of Brentwood City Hall 708 Third Street Brentwood., CA 94513 Brentwood Hills Country Club Draft Environmental Impact Report Our File No . 72748-002 Gentlemen: We represent A.G. Spanos Land Company in connection with the Brentwood Hills Country" Club proposal currently under consideration by the City. We have submitted a detailed set of comments on the draft EIR to City staff and will not repeat those comments here. There are, however, several additional paints that we wish to highlight in connection with tonight ' s hearing. A. Municipal Golf Course. As the EIR describes in detail, the Project is a mixed-use development , with residential, recreational , and commercial/Planned Employment Center uses, The Project ' s physical components have not changed since the preparation of the draft SIR, but there is one new development that may merit mention in the final EIR -- the current joint efforts by the City and Spanos to develop the Project ' s golf course as a City-owned amenity. We note that the municipal golf course would be a benefit to the City without any environmental downside . In fact, it may ease some concerns that have been raised . For example, there have been concerns relating to private ownership Planning Commission City of Brentwood April 7 , 1992 Page 2 of the facility because of the detention basins proposed to be -� located on site. Conveyance of the golf course land to the City would completely avoid any conflict between private L maintenance of the land and the public flood control functions . B . Conversion of Vacant Land. The EIR identifies the conversion of vacant land to urban uses as a significant impact . However, the City' s General Plan contemplates such conversion in its land use planning. The Project will also advance and implement the City' s Planned Employment Center goals , objectives and policies . C. Public Infrastructure. The EIR discusses the anticipated infrastructure needs of the region at some length. Mitigation measures proposed for this Project include traffic impact fees, limited traffic studies during the implementation of the Project and construction of water storage and wastewater treatment facilities . However , the EIR should clarify that the City' s Capital Tmprovement Financing Program is the appropriate and exclusive mechanism to determine the level of improvements that will be required and to impose fees to fund those improvements . Traffic mitigation fees are governed by the CIFP and the July' 27, 1989 Brentwood Capital Improvement Costs and Basis of Development Fees . Pursuant to City ordinance, the City shall initiate the improvements anticipated by the CIFP, receiving mitigation fees from developers at the time of issuance of building permits . Spanos will pay its share of the cost as building permits for each phase of the Project are issued, as provided by City ordinance . No further studies or fees are appropriate or authorized. Water storage and wastewater facilities must also be covered by a CIFP under municipal law. Prior to approval of ..the final map, the City shall determine and design. the .necessary water storage facilities , design the Project ' s wastewater treatment facilities and secure funding for these improvements . water storage and transmission and wastewater treatment facilities are to be installed prior to issuance of certificates of.occupancy. Planning Commission City of Brentwood April 7 , 1992 page 3 D. School Site. The EIR identifies a potential impact relating to lack of adequate access to the proposed school site and recommends that the site be moved to the west . The project applications contemplate that the EIR' s proposed school site be subdivided into several single-family lots . We understand that the City wishes to ensure adequate access to the school ; however , it is not necessary to move the site at this time. ' "We propose that the tentative map be approved with the school, site as originally proposed, subject to the condition that the developer establish to the satisfaction of the Brentwood Unified School District that the site is accessible by two full streets prior to recordation of the final map and subject to the further condition that if the developer does not establish this access , the school site shall be relocated as recommended in the draft EIR. We have submitted this proposal to the District for its consideration ( see attached letter to Mr . J . Douglas Adams) . E. Electromagnetic Fields , CThe EIR recommends that the Final Subdivision Report include statements regarding potential hazards associated with electromagnetic fields from high voltage transmission lines . There is no authority or need for such a requirement . As the EIR relates, the original study indicating a possible health risk from electromagnetic fields has been discredited, and attempts to duplicate that study have had mixed results . The State of California does not regulate land uses near high voltage lines except with respect to schools . Based on all of the foregoing, we oppose the proposed mitigation measure. If the City has particular concerns regarding electromagnetic fields, we recommend that a condition be imposed that in the event the State adopts standards governing human exposure to high voltage transmission lines , purchasers of all lots within the scope of said standards shall be informed of the presence of the transmission lines and the ongoing research regarding the health effects of those lines . F. Acoustical Design. The EIR indicates a potential noise impact on 1 residential units located near Balfour Road, Concord Avenue and Planning Commission City of Brentwood April 7 , 1592 Page 4 the proposed Delta Expressway. Prior to the issuance of building permits, the developer will submit to the Planning Director an acoustical analysis demonstrating that the residential units adjacent to these roadways have been designed to meet the recommended interior noise level for residential units of 45 dBA ldn. We thank you for the opportunity to comment on the draft ETR, and welcome any questions you may have on the above issues, or any other matters relating to the Brentwood Hills Country Club. Very truly yours, McCUTCHEN, DOY"LE, BROWN & ENERSEN $y "...-- Ann R. Danforth ARM 6626g Enclosure cc: James Panagopoulos (w/enol . ) William Barbour (w/enol . ) Daniel J. Curtin, Jr . (w/enol . ) r RESPONSES TO McCUTCHEN, DOYLE, BROWN 8: ENERSEN, ANN R. DANFORTH. LETTER DATED APRIL 7, 1992. - Response 1 The current joint efforts by the City and Spanos to develop the project's golf course as a City-owned facility are noted. Although City ownership of the golf course would not change any environmental impacts of the project, it would, as.-.' noted in the comment, avoid any conflict between private maintenance of the lana and public flood control functions. Response 2 The City's adopted General Plan contemplates the conversion of only 80 acres of the 751 -acre project site to urban uses. The City's preliminary General Plan update contemplates the conversion of the entire site to urban uses; however, this plan has not been adopted. The draft EIR, in Table C-1, indicates that the project is consistent with current general plan policies related to Planned Employment Centers. Response 3 For the most part, the Capital Improvement Financing Program is the appropriate vehicle for assuring that improvements related to water storage, wastewater treatment, and traffic are provided and financed to accommodate new development. However, with respect to water supply, the Public Forks Department has indicated that two water storage reservoirs are necessary to adequately serve the site and that only one is provided in the C'IFP in which the Applicant has agreed to participate. Therefore, a new Mitigation Measure K,1,b has been added indicating that unless the CIFP is modified to include the construction of the second reservoir, the second reservoir would be the responsibility of the Applicant (see Response 2 to the Brentwood Public Works Department Memorandum dated March 31, 1992). Mitigation for the potential traffic impacts of a project of this magnitude is complex and involves not only dealing with local impacts but also cumulative and regional impacts. Some of the cumulative impact mitigation measures are not provided for in the CIFP. No financing mechanism has been established for regional transportation improvements and the mitigation measures in the EIR are intended to assure that the project participates in the funding of such improvements. Without developer participation in these improvements, such as the Delta Expressway and the widening of Highway 4, these facilities cannot be constructed. Michael Paoli and Associates C-89 The requirement to do limited traffic studies as each phase of the project is developed is intended to identify the specific mitigation measures needed at a particular point in time. A project of thismagnitude will be phased over a number of years and the improvements that are in place at a particular point in time will vary depending on the status of various other developments in the area. The studies will help to identify only the measures needed at the time and thus will provide for efficient ,timing of improvements. No new improvements would be required as a result of the studies. Response 4 See Response 5 to the March 31, 1992, letter from McCutchen, Doyle, Brown & Enersen. Response 5 The City has the authority to require the subject mitigation measure, and the need is based on a policy of "prudent avoidance" as stated in the draft EIR (page N-2) and the obligation of the City to inform residents of a potential hazard that has been receiving considerable, recent public and scientific attention. The draft EIR does not state that the orivinal study indicating a possible health risk from electromagnetic fields has been discredited. Instead, it states "the results of this study have been questioned because of possible problems with its design" The mitigation measure proposed in the EIR is appropriate. It will ensure that prospective purchasers of lots in areas affected by the transmission limes are made aware of any potential health effects of electromagnetic radiation before they buy a lot. The information would be developed by the Applicant, in conjunction with a qualified consultant, PG&E, and the City. Under the alternative mitigation measure proposed by the respondent, depending on if and when the state adopts standards, lot purchasers may not be informed of any potential health hazards until after they own and reside on an affected lot. Response 6 r -this response is consistent with Mitigation Measure 2, on page 1-12 of the draft EIR. C-90 Michael Paoli and Associates __. Plann.im- Commission Minutes ril 7, 199" The Pub'Iic Hearing was opened at 9:35 p.m. Jim Panagopoulos of A. G. Spanos provided a presentation regarding the history of the property and the project, noted monies paid into the CIFP, to Brentwood Union School District,, and to East Contra Costa Irrigation District. 2 Don Reiners, Land Planner representing A. G. Spanos, provided a presentation reviewing maps, explaining the project's skyline, foothills,and planned grading concept. Tom Rogers, of Griffith Lane, commended Spanos' land offer to the City of Brentwood for a golf course and noted the positive impacts of this project.. s 4 Bill Bristow, ex-superintendent of Brentwood Union School District, noted concerns regarding adequate accessibility to the school site. , 5 Jim Panagopoulos stated that a condition can be placed on his project requiring two major access paints to the school district_ Ann Danforth, representing the.applicant,addressed the issue regarding the loss of the oak trees, fi and indicated that it should not be shown as a significant loss. Nis. Danforth also noted a letter which stated that EIR contained standard mitigation measures. Ms. Danforth objected to the additional mitigation measures imposed by Staff. 7 .Harry Green of Brentwood noted the Historical Society viewed the site, and had gathered items for an exhibit at the museum. The Public Hearing on the draft EIR was closed at 10:42 p.m. The Planning Commission commented on the draft EIR and asked the following questions: 8 -Noted the cancellation of the Williamson Act contract and requested this be further clarified in the EIR regarding how the cancellation works and where the money goes upon cancellation. 5 -Requested clarification regarding the elimination and addition of the oak:trees. 1 G -Requested the Deer Valley Road improvements be addressed. 11 -Noted J.2 increased storm drainage run off, and requested that trash run off be addressed as mitigation for maintenance. 12 -Stated concern regarding financial impact for any additional golf courses in Brentwood. 13 -Requested clarification regarding building and access to the coal mines. 14 -Inquirers regarding the refuge dump near the gun club. 15 -Discussed the proposed location of the transmission towers and lines. 16 -Discussed maintenance access roads 17 -Noted lack of parklands M/S/CJU Lawreno-t(Ni eff to continue the Public Hearing on the annexation, general plan and sphere of influence amendments, and rezoning to the May 19, 1992 Planning Commission meeting. ........ ... RESPONSES TO COMMENTS AT THE BRENTWOOD PLANNING CONLMISSION PUBLIC HEARING HELD ON APRIL 7, 1992. Response 1 Mr. Panagopoulos' presentation is noted. No further response is required. Response 2 Mr. Reiners' Presentation is noted. No further response is required. Response 3 Mr. Rogers' comments regarding the positive aspects of a municipal golf course on the project site are noted. Response 4 See response to Brentwood Union School District letter dated March 10, 1992. Response 5 See response to Brentwood Union School District letter dated March 10, 1992, Response 6 See Response 2 to McCutchen, Doyle, Brown & Enerson (Ann Danforth's) March 31, 1992 letter. Response. 7 See responses to the East Contra Costa Historical Society letter dated April 1, 1992. Response 8 r •'-An explanation of how the Williamson Act works, from the .1990-91 Williamson Act Status Report, California Department of Conservation, March 1992, is attached. Response 9 See Response 2 to McCutchen, Doyle, Brown & Enerson (Ann Danforth's) : . March 31, 1992 letter. C-92 Michael Paoli and Associates transportation system impacts. However, MTC staff finds that there are a number of very affective mitigation measures that the City could _ implement. The goal of these measures should be to reduce traffic volume impacts to no more that a few percentage points of cumulative traffic volume. In view of the substantial traffic impacts of this project, we recommend that the EIR consider them. They are: 3 • Downscaling the project; • Jobs/housing balance measures, such as timing job and residegtial development to maintain a balance and ensuring that housing is affordable to project worker, • Transit service links to planned and existing regional transit systems including BART; • Transportation Demand Management Programs to encourage ridesharing and heavy use of transit service; and • Developer contributions towards the funding of regional transportation system improvements Thank you for the opportunity to comment on this Draft EIR, We look forward to receiving the final document. Sincerely, Susan Pultz Environmental Review Officer cc: Commissioners Weir, Schroder, and McKenna; ABAG Clearinghouse; Caltrans; BAAQMD ... .................................. RESPONSES TO METROPOLITAN TRANSPORTATION COMMISSION, SUSAN PULTZ. LETTER DATED MARCH 30, 1992. Response 1 The cumulative analysis discusses the impact on regional roadways, many of which cannot be mitigated without additional regional efforts that are now underway. The DEIR does indicate the potential for greater impacts if the growth projections are not realized in the employment sector. Further qualification of deterioration of traffic service levels on regional roadways would not provide significant additional information to warrant the level of effort that would be required. Response 2 The development assumptions used in the cumulative traffic impact analysis are discussed on page G-26 and in Section W of the draft EIR (Cumulative Impacts). Response 3 Several of the mitigation measures suggested in this comment are included in the DEIR: • Payment of regional mitigation fees when they are implemented (Mitigation Measure 1, page G-25); • -Coordination with area transit agencies and the City to extend existing transit routes to the project site (Mitigation Measure 2 on page G-26). The following mitigation measure (G,3,c) has been added to the summary section of this final EIR to alleviate regional impacts: • The Planned Employment Center area shall have a Transportation Demand Management (TDM) program and a coordinator which will provide information on transit and help set up ridesharing arrangements. This system should have achievable goals and objectives consistent with future ordinances the City may implement. C-42 Michael Paoli and Associates Joint Exercise of Powers Agency BYPASS AUTHOPITY _ X> City of'k-'loch City of Brentwood County' of Cry~L Costa March 25, 1992 ' 2 7 192 Mark Jackson Planning Department s cis Of aRL 708 Third Street OPMEN i�ui�uat�r p�,,,�ae~riENT a21. Brentwood, CA 94513 File: Review:Brentwood Dear Mr. Jackson: We have reviewed the Brentwood Hills Country Club/Spanos Draft Environmental Impact Report (DEIR) and have the following comments and concerns: 1. Balfour Road is one of the four proposed east-west connectors for the Delta Expressway and will be a major access point to the Delta Expressway. Therefore, .� impacts and mitigations should be carefully addressed. Right of way for the ultimate configuration of six lanes should be provided to assure adequate capacity for proposed development. Access should be limited to a minimum of 800 foot intervals to assure that weaving and merging of traffic is minimized and that traffic signal timing is optimum. 2. The preferred alternative for the Delta Expressway/Balfour Road interchange is a partial cloverleaf configuration, which was approved by the Planning Commission with the Blackhawk Nunn Project. However, Figures B-5 and B-6 in the DEIR show a diamond interchange. Although traffic volumes projected for years 2005 and 2010 can be adequately accommodated with a tight diamond interchange, changes in the general plan contemplated for this area, such as this project, the A.C. Spanos project, and other land use changes, which may include commercial and office development, will warrant a higher capacity interchange such as a partial cloverleaf interchange. The Technical Advisory Committee to the State Route 4 Bypass Authority has recommended setting aside right of way for this future interchange configuration to allow for construction in the future with a minimum amount of disruption to the existing land uses. Also, this will eliminate significantly higher costs of relocation and acquisition in the future. t 3. The New Concord Avenue alignment shown on Figure B-5 is located unacceptably close to the Delta Expressway ramps. The. City of Brentwood General Flan specifically states that no thoroughfare intersection shall be closer than 1,000 feet to.a freeway rir/off ramp. This is a significant impact that could affect capacity and circulation on Balfour Road, at the Delta Expressway ramps, and to the 'project site. Therefore, this impact should be mitigated by modifying the site plan so that all intersections are at least 1,000 feet from the proposed delta Expressway loop ramps. stall'.• Board of Directors: Ex Drnio: Contra costa court, Torn T'orakson, Chairman City of Livermore 255 Glacier©rive Barra Guise Alameda County Marenez, CA 94553 I—IV If,,, r`rnlr� r`nr+� iJJ }a�!.7LC'T1r'_; MIfC}1;1'27.13 FP Mr. Mark Jackson March 25, 1992 Page 2 4. All project driveways and intersections on Balfour Road should be coordinated and 4 aligned with intersections accessing the Hancock/Fairway Palms Project to keep median openings and conflicts to a minimum. 5. Most of the widening of Ba€four Road should occur on the south side. The Santa 5 Fe-Pacific compressor station will make it infeasible to widen on the north side of Balfour Road. The widening of Balfour Road should be coordinated with the Blackhawk Nunn and Hancock Projects. The Authority staff will provide the proposed alignment through the interchange area. 6. The DEIR states that this project will generate 2,944 trips during the p.m. peak hour. However, the Delta Expressway Environmental Impact Report did not consider these additional trips when planning for capacity related improvements associated with the Delta Expressway. Therefore, the project sponsor should add 6 cumulative traffic impacts to, the Delta Expressway DEIR baseline traffic data and should determine if the additional traffic from this project will warrant capacity related mitigations, in addition to those proposed for the Delta Expressway. Also, regional traffic impact fees should be collected to fund capacity improvements needed as a result of this project. See Comment 10 below. 7. The DES describes available transit service as either very limited or not available. 7 The proposed Delta Expressway alignment has reserved right of way in the median for future transit. How would the project sponsor encourage transit in this corridor? 8 The noise abatement measures proposed in Section € of the DEIR for noise impacts associated with cumulative traffic from the ultimate alignments of Balfour 8 Road and the Delta Expressway may not be adequate. The project sponsor should provide adequate noise abatement measures with the Spanos Project for the cumulative traffic on the Delta Expressway and Balfour Road. 9 9. tTo provide local circulation, the DEIR should analyze the need for an overpass or underpass crossing of the Delta Expressway between Balfour Road and Marsh Creek Road. 10. The State Route 4 Bypass Authority has recommended that the City of Brentwood, the City of Antioch, and the County adapt auniform development fee to finance the Delta Expresses y construction. Without this fee and the revenue it generates, lo the Delta Expressway cannot be built. if new development does not contribute to the Delta Expressway, the impacts of regional traffic cannot be mitigated and the Cities` and County's General Plans cannot be implemented. The development should be required, as a condition of approval, to mitigate regional impacts by Mr. Mark .Jackson March 25, 1992 = Page 3 paying the interim regional impact fee. The developer should also, when entering into a development agreement, be required to pay the proposed mitigation fee for the construction of the Delta Expressway. r If you have any questions regarding these comments, please contact me at (510) 313- 2382. Very truly yours, c.� Lowell Tunison Senior Civil Engineer Major Projects LT:TR:,peo c:.Jackson.t3 cc: M. shiu, Road Engineering C. Bailey, Major Projects J. Cutler, Community Development i r 4 RESPONSES TO JOINT EXERCISE, F POWERS AGENCY, STATE ROUTE 4 BYPASS AUTHORITY, LOWELL TUNISON. LETTER DATED MARCH 25, 1992. Response 1 It is understood that the preferred configuration for the east-west connector for the proposed Delta Expressway is now Marsh Creek Road. This assumption was used in the analysis. A new mitigation measure (G,5,b) has been added in the final EIR: • Balfour Road shall have adequate right-of-way for six travel lanes between the east side and west side ramps to the Deity Expressway. Access to Balfour Road in the vicinity of the Delta Expressway is not expected to be a problem (see Response 3, below). Response 2 Comment noted. Since this report was finished, additional analysis was done relative to interchange configurations of Delta Expressway and Balfour Road. First of all, an analysis of the Delta Express waylBalfour Road intersection as an at-grade intersection was inadvertently omitted. This description is consistent with the proposed project as currently defined by the SR 4 Bypass Authority. This analysis showed that the at-grade intersection would be insufficient to handle the projected volumes; the levels of service would be: • A.M. Peak Hour: V/C = 1.14; LOS = F • P.M. Peak Hour: V/C = 1.46; LOS = F This could be adequately mitigated by a diamond interchange configuration, as analyzed in the DEIR. Ultimately, a partial cloverleaf interchange will probably be needed at this location. The following mitigation measure (G,6,c) has been added to the final EIR: • The Applicant shall contribute to the cost of constructing a grade-separated interchange at the Delta Expressway and Balfour Road interchange. This funding should be accomplished through inclusion of this interchange in the regional mitigation fee now under consideration in East County. C-46 Michael Paoli and Associates Response 10 In response to this comment, the impacts on Deer Valley .Road were calculated. It was found that the rural roadway LOS on this route would be as follows under cumulative development conditions: • With Delta Expressway: A.M. Peak Hour: LOS C P.M. Peak Dour: LOS D ' Without Delta Expressway: A.M. Peak Hour: LOSE P.M. Peak Hour: LCIS E Details of the regional route level of service analysis are included in the appendix on file with the City of Brentwood Community Development Department. I It is reasonable to conclude that the LOS E and LOS F conditions on Deer Valley Road and Marsh Creek Road, rural, winding, two-lane roadways with inadequate shoulders could create an additional safety hazard, as well as additional wear and tear on the facility. Mitigation on these regional routes will emerge from regional study efforts now underway in east county. Response l l This is not expected to be a significant problem and will be handled through routine maintenance of the flood control facilities and golf course. Response 12 The financial impacts of golf courses in Brentwood is not an environmental issue and was, therefore, not discussed in the E1R. Response 13 Residential lots will not be permitted in areas where there is not at least 100 feet of soil cover over any suspected mined-out areas (Impact E,6 and Mitigation Measures E,6,a through E,6,d pertain to the mining area). If the engine platform structure and vertical mine shaft area are preserved as part of a public open space area, as recommended in Mitigation Measures U,1,a through U,1,d, the area shown in Figure U-6 in the draft EIR would be fenced off to prevent direct public access and a nondestructive mine-closing device would be installed in the mine shaft for public safety. Michael Paoli and Associates C-93 Response 14 The gun club and the old landfill site associated with it is outside the project site east of Concord Avenue. Response 15 The transmission towers and power lines are proposed to be relocated in the northwest portion of the project site as depicted on Figure B-4 in the draft EIR. The power lines and towers would be relocated such that the easement would abut the northern one-half of the westerly property line. The relocated easement would then angle to the east and connect to the existing alignment. Response 16 See Response 6 to McCutchen, Doyle, Brown & Enerson (Ann Danforth's) March 31, 1992 letter. Response 17 The provision of parkland is discussed Section R of the draft EIR. See also the responses to the letter from Michael W. Clark: dated February 24, 1992. C-94 Michael Paoli and Associates SECTION D DRAFT EIR ERRATA This section presents corrections to the draft EIR. This section constitutes an addendum to the EIR pursuant to Section 15164 of the State CEQAGuidelines and does not raise any new significant environmental effects. 1. Table A-1, Page A-3, Public Facilities and Services, is amended to include the following. Mos�c uito Abatement: 'Contra Costa Mosquito Abatement District 2. . Table B-1, Page B-10, is revised to insert the following: Mosquito Abatement Contra Costa Mosquito Abatement District 3. Table E-1 , Page E-5, is corrected for the soil types listed below to read as follows. Symbol Shrink/Swell USCS Plasticity Liquid Depth to Potential Classification Index Limit Bedrock (ft) KaC Moderate-High CL, SC 10-35 25-50 >5 Pb Moderate-High CL 10-15 25-35 0-43 20-30 35-45 43-66 Ka.E Moderate-High SC, CL 10-35 25-50 >5 4. Pa ae R-1, Paragraph 6, first sentence is replaced to read as follows: The City of Brentwood owns all parks within City boundaries except Brentwood City Park, located at Dainty and Oak Streets, which is owned and maintained by the Brentwood Recreation and Park District through County property taxes and augmentation funds. 5. Figure D-2, Page D-4, has been revised to correct an error in the scale. The revised figure is included at the end of this section. Michael Paoli and Associates D-1 6. Page D-3, last paragraph, first sentence is revised to read as follows: A Notice of Non-Renewal of the contract holding the Spanos site has been filed with Contra Costa County, and the contract is due to expire in February 1999. 7. Table A-2, Page'A-31, Impact K, mitigation measure 3, last sentence, is revised to read as follows. Based upon this analysis, the City shall consider establishing a fee structure to cover these costs. S. Table A-2, Page A-32, Impact L, mitigation measure 3, last sentence, is revised to read as follows: Based upon this analysis, the City shall consider establishing a fee structure to cover these costs. 9. Appendix 2, Page 9, is revised to add the following: PROJECT LOCATION AND DESCRIPTION A. G. Spanos Land Development Company D-2 Michael Paoli and Associates HO'W' THE 'W'ILLIAMSON ACT PROGRAM WORKS At the heart of the program is the with a county or city government, usually relationship between the landowner and with the planning department. Assuming the county or city govemment. They are the parcel's eligibility (see below), the joined together in a contract which each application is routinely processed and agrees to give up specific benefits in return approved. The contract signed by the for mutual gain. The landowner forgoes landowner and the local government has ' the possibility of development, or conver- an initial term of 10 years, with renewal sion of property into non-agriculture or non- occurring automatically each year. open space uses during the term of the (County governments can establish initial contract, in return for lower property taxes. contract terms for longer periods of time; The local government forgoes a portion of several use 20-year terms.) Since a its property tax revenues in return for the contract is attached to the land, it isnot planning and land use advantages implicit affected by the transfer of parcel owner- in retaining rural land in agricultural or ship. other open space use. Both local government and the Eligibility landowner are voluntary participants. Whether or not to enroll in the Williamson All agricultural acreage in Califor- Act program is a decision for the county nia--whether devoted to crops or grazing board of supervisors or the city council. animals—is eligible for Williamson Act Once a program is in place in a commu- coverage. Contracts can also be extended nity, agricultural landowners have the to non-agriculture "open space'lands, a option to enroll. category which includes scenic highway corridors,wi€d€de habitats,wetlands, sant Generally, it is easier to enroll land ponds, and recreational lands, into the Williamson Act than to withdraw it from contractual agreement. State law The other major statewide eligibility (Government Code Chapter 7, Revenue requirements concern location within an and Taxation Code Sections 421 through agricultural preserve (see below) and ' 530.5) specifies the requirements and minimum parcel size. With the intention of procedures for these and other aspects of keeping Williamson Act panels large the program. Following is an expanded enough to maintain agriculture operations, description of the major features of the state policy now calls for a 10-acre mini- program. mum for prime land and 40 acres for nonprime acreage. Local governments can and do impose additional requirements on Gettincy Into the program the acceptance and retention of contracts, including larger minimum parcel sizes and An interested landowner files an other standards for the agricultural use of application for a Williamson Act contract properties. ti ........................... .............................. ........................... ...... Land Classifications Preferential Assessment Participating acreage is classified For property tax purposes, into three land use categories: urban Williamson Act parcels are assessed pnme,other prime, and nonprime. While according to the income produced by the these classifications have no bearing on land, not according to the market value contract eligibility, they are the basis for the approach(adjusted since 1979 according allocation of state subventions to local to Proposition 13 restrictions) employed for governments with Williamson Act parcels, most other types of properly in California. More generally,the classifications provide Specifically, county assessors use an a means for tracking trends in the income capitalization method to determine program*s acreage. The primeinonprime the value of contracted land. This method difference is a standard distinction based takes into account a standard interest rate, on the relative capability of a parcel for a risk factor, and the property lax rate, as growing crops and supporting grazing well as net income. Preferential assess- animals. The urtan prime category ment in this manner requires the assessors includes parcels located within three miles to ignore comparable sales data(now of cities of 25,000 population or more adjusted according to a base year) as the (15,000-25,000 in some cases). basis for valuing Williamson Act property. In nearly all cases, the income Aaricultural Preserves capitalization approach produces a lower assessed valuation for a parcel—and Location within an agricultural hence a smaller property tax payment preserve is a.major requirement for the than an assessment that takes into ac- enrollment and retention of Williamson Act count the market value. For some con- parcels. Either the preserve already exists tracted parcels, however,the Williamson or is created by the local government at the Act value is higher than the updated base time the contract is approved. With a year value required under Proposition 13. minimum size of 100 acres (or more Since 1979, assessors have been required according to local govemment standards), to apply the lower of the two assessments. a single preserve may contain more than one contracted parcel as well as non- contracted land. The preserve requirement Withdrawing From the is intended to serve a planning and land Program use purpose—to concentrate participating parcels in areas reserved for agriculture Terminating a contract is more and thus protect them from other uses. ' complex than enrolling in one. The 10- Many counties have supported this,objet- year-contracts are automatically renewed five by making exclusive or other agricul- every year. Stopping this process requires tural zoning coincide with the preserves. deliberate action, by either the landowner or local government to amend the original contract. The four methods for removing a Consistency means that: 1) an parcel from Williamson Act coverage are: attemative use is specified which is consis- 1) nonrenewal; 2) cancellation; 3) city tent with local general plans; 2) the annexation under certain conditions; and removal of adjacent lands from agriculture 4) eminent domain. Most terminations are is not likely to result; 3) discontiguous accomplished through nonrenewal. urban development will not result; and 4) there is no nearby non-contracted land available for the attemative use. Nonrenewal A landowner with an approved Either party to the contract—the cancellation pays a penalty equal to 12.5% landowner or the local government--can of the current market value of the land. initiate such an action by filing a notice of Penalty payments are deposited into the nonrenewal. The notice institutes a 9-year State's General Fund. Cancellations phase out of the contract over its remaining undergo a two-step process in which a life. Conversion of the land to a non- tentative approval by a governing board is agricultural use is delayed until the end of followed within a year by a final.approval. the phase out, while the assessment is The one-year interval allows for obtaining gradually increased from the Williamson the necessary permits for the alternative Act use value level to full market value. use. Without such permits and the pay- The state subvention entitlement for the ment of the penalty,the final approval is acreage represented by a nonrenewed denied. (State review and approval is not parcel ceases at the time notice is given, required for processing a cancellation, as is required for removal of parcels from the Timber Production Zone Program.) Cancellation State law limits circumstances City Protest and Annexation under which cancellation can take place. Cancellation is to be used only for"exiraor- Under certain circumstances, dinary"circumstances, Caldomia courts annexation of a Williamson AC parcel by a have ruled. As compared to the phase out city automatically results in a termination of of a nonrenewal, a cancellation results in the contract without penalty. This applies immediate termination of a contract. Only to a parcel which, at the time of enrollment the landowner can apply for a cancellation, in the program,was located within one mile and only the governing board of a local of the city's boundary and with a contract government county board of supervisors which had been protested by the city at or city council—can approve such a that time. Contracts on other parcels request. To do so, the board has to continue in force at the time of annexation. conduct a hearing on the request and Since January 1, 1991, new city protests of make certain findings. The board must find contracts have not been possible because that a specific cancellation would either be of an amendment to the Williamson Act consistent with the intent of the Williamson Act or would be in the public interest. ............................ ......................................... Eminent Domain acre for prime agriculture land within three miles of incorporated cities of Contracts are also terminated specified sizes ("urban prime` , when parcels are acquired by state or local government agencies for public improve- . One dollar($1) per acre for all other ments. Removal from Williamson Act and prime agriculture land-,and agricultural preserve status is immediate, either for all or part of a parcel,depending 0 Forty cents ($0.40) per acre for all land, on how much of the land is taken for the other than prime agricultural land,which public purpose. State law attempts to limit is devoted to open-space uses of such removals by denying the location of statewide significance ('nonprime' . public improvements in agricultural pre- serves based primarily on lower land costs Prime agricultural land is defined and if other lands provide feasible loca- by the Act as land having good soil charac- tions. teristics for agriculture or supporting high levels of agricultural production according to economic criteria., Open space of State Subventions statewide significance is defined in the Govemment Code as land which consti- In partial compensation for the totes a resource whose preservation is of foregone property tax revenues resulting more than local importance for ecological, from reduced assessmems on contracted economic,educational,or other purposes. lands,the state annually pays a subvention Much of the open space,or nonprime, to all participating counties and cities. lands under Williamson Act contract are Funds are allocated according to the grazing and watershed lands. acreage in urban prime, other prime, and nonprime classifications. The payments are based on annual reports of enrolled acreage filed by local governments with the Stale Department of Conservation. Counties and cities do not receive subventions for land under contract which is undergoing nonrenewal,or whose value ...Is as high,or higher, under the Williamson Act than it would be K it were unrestricted by contract, and therefore assessed at the Proposition 13 value. Since 1976, Open Space ' Subvention entitlement rates have been fixed at: • Five dollars (SS) to eight dollars ($8) per L t i err tz p , �. •. �:� d , rte. �s �J` r\/ •:. .� ` �� '; �' ` 1ry..:'''l.e1t,.,iJ..� I:.''/ t'`�',�)�'i�,,'/�,+J„`,,.+/`il�.�•/ � \y i• S ��� ..��`/J� if,,•. f/•,,, t�•` � �j�.a'o J�''\� /�'��\`t' �z: /``,,, �' '7\ \ -` .'t'\ ,\ J• ,i f '�j✓✓.y J s,J t>,i t t 4��,,, 1 f J`,s J :. /_.��/r ./IBJ j�/!`/r\, /j\/ �' \y \ \ \ t \ \ J•'-�\' J :. �J� f F V /\/ \y j ♦r\ y\/C�/% r /\J\' r�\gid.\ t {� \ \ \ ` i ...a. ,;`j 1�'� 1 y`J 1•. 1„,.`J I i 1,./1 i � �.d�y`.'1'.+i 1 � r`/J 'rl�.,''J.,,././,,,, J., .•. .t. Lee •f1'• O \ `.\ �\'•J\"'r -J\'"•/ „"/ ,,,,./,�•'';,+'/ ,\s' I.y r f s t s 1,,:`/t � i 1,...,. t •.j'� r:".. ✓J.✓i��I\/J\� k\ j\�f\JV rte7,7 1J� /\•moi\;r\�� \J\• \ .,•./ ,+"/,t 1ti� �.. J\�\..Jt.•/ �!'ia�,f.' �' t/.`,1�,.``/w,,/ .�r`i.j"` \� /tom✓J:.✓/\� \//\/ 3. Dj � Brentwood 4 D --. - t Balfour Rd. s \ y\ 1 trIA1��` A, X 5 ' J / J ✓ 9 "C-'\ J \.+J`.+. y �7�,,•/ •' l J t J f..•J 1 r� �" • .t>_.�' '' Ci � 1 :• e.''.l�•:.'`�1:..`T 3 J� 3 /J'.\•„/I`i J„\, „\�.+ �...'/`�/,\ r Project Area LL �+ L Planning Area Boundary L , Prime Farmland Grazing Land Farmland of ' Urban and Statewide Importance Built-up Land L SCALE: Unique Farmland Other Land Farmland of .+' Q 1 utile L Local Importance Source: Dept. of Conservation Base Map 6/90 Michael Paoli PRIME FARMLAND IN and FIGURE D-2 Associates THE BRENTWOOD AREA TABLE OF CONTENTS Page SECTION A SUMMARY A - I SECTION B NOTIFICATION B - I SECTION C COMMENTS RECEIVED AND RESPONSES TO COivS:4ENTS Contra Costa Resource Conservation District C - 2 Response C - 4 Contra Costa County Flood Control & Water Conservation District C - 5 Response C - 7 Land Planning Consultants, Inc. (February 26, 1992) C. - 8 Response C' - 10 Brentwood Union School District (March 10, 1992) C - 1 I Response C - 13 Land Planning Consultants, Inc. (March 18, 1992) C - 14 Response C - 15 Brentwood Union School District (March 19, 1992) C - 16 Response C - 18 Michael W. Clark C - 19 Response C - 21 Contra Costa Mosquito Abatement District C - 22 Response C - 25 East Contra Costa Historical Society C - 26 Response C - 27 Brentwood Recreation and Park District C - 28 Response C - 29 City of Brentwood Public Works Department C - 30 Response C - 32 California Department of Conservation C - 34 Response C - 36 Metropolitan Transportation Commission C - 40 Response C - 42 Joint Exercise of Powers Agency, State Route 4 Bypass Authority C - 43 Response C - 46 Contra Costa County Community Development Department C - 49 r Response C - 54 McCutchen, Doyle, Brown & E.nersen (March 31, 1992) C - 59 Response C - 77 f t Michael Paoli and Associates u .........................I....................................................... ........................................ .............. .................................................. McCutchen, Doyle, Brown & Enersen (April 7, 1992) C - 85 Response C - 89 April 7, 1992 Planning, Commission Hearing Comments C - 91 Response C - 92 SECTION D DRAFT EIR ERRATA D - I Michael Paoli and Associates SECTIO' A SUMMARY _ Tables A-1 and A-2 constitute the revised Summary section of this EIR. The revisions are shown in italics. Table A-1 provides a summary description of the proposed project in outline. ` form. Project maps are included for reference. ' Table A-2 summarizes the potential adverse environmental impacts associated with the project, lists the measures that have been identified to mitigate the impacts, indicates whether the impacts can be mitigated to a level of insignificance, identifies the agency or agencies responsible for implementation of the mitigation measures, and specifies how the measures will be implemented and monitored. Table A-2 also includes a summary of the significant unavoidable impacts, a summary of unresolved or controversial issues associated with the project, and a summary of the project alternatives. Michael Paoli and Associates A-1 TABLE A-1 SUMMARY PROJECT DESCRIPTIONT Name of Prom: A. G. Spanes'Brentwood Hills Country Club State Clearinghouse Number: 91013066 tv of Brentwood EIR .File Number: 90-2 € Name of Annlirant: ' A. G. Spanos Land Company, Inc. Lead Apencv: City of Brentwood Responsible Anencies: Contra Costa County Local Agency Formation Commission WCO} State of California Department of Fish and Game Contra Costa County Flood Control and Water Conservation District East Contra Costa Irrigation District Brentwood Recreation and Park D=-ict ,Locator of Project Southwest corner of Balfour Road and Concord Avenue, immediately southwest of Brentwood, California Area of Proiect Site: W.7 acres A-2 Michael Paoli and Associates ProPosed LandUses: Land 11sc Acres No. of Units SQ- Footage Neighborhood Commercial 14.7 160,100 Planned Employment Center 54.4 710,900 Cluster Residential 31.2 420 Single Family Residential 277.4 1,202 School Site 10.0 Park Site 16.7 Day Care Center 1.5 Golf Course 211.0 ' Open Space 85.2 Urban Reserve 36.$ Streets and Interchange TOTAL: 750.7 1,622 871,000 P'agulation and Employment: Estimated Papulation: 4,957 Estimated Employment: 1,456 Public Facilities and Services: Potable Waren: City of Brentwood Irrigation Water: East Contra Costa Irrigation District Wastcwater: City of Brentwood Mood Control and Drainage: Contra Costa County Flood Control and Water Conservation District and City of Brentwood Solid Waste: Brentwood Disposal Service Law Enforcement: Brentwood Police Department Fire Prorecdon/Emeragencv Services: East Diablo Fire Protection District sm : Liberty Union High School District Brentwood Union School District Parks and Recreation: Brentwood Recreation and Park District Z' : Contra Costa County Public Library Electricity and gas: Pacific Gas and Electric Company el h ne: Pacific Bell S=ets: City of Brentwood . Wsauuiro Af atement. Contra Costa Mosquito Abatement District Recuired Permits and Ag roval.s: General Plan Amendment Zone Reclassification Preliminary and Final Development Plans Vesting Tentative Map Use Permit for Country Club Development Agreement Annexation Application 89-4 Capital ImprovementFinancing Program Cancellation of Agricultural Preserve Contract No. 12-76 Michael Paoli and Associates A-3 ................. ............. ............ .................................................... ............. • LONE TREE WAY­ I LONE way Gregory Lf%. > G,*A1 5t.< .._!Lo MOKELMUNE ACLTpUCMxsnasgta }t/ s t A: Crtlh seek PC Smd cret 041 X 700D .1K BREN7,A r A In San Jose A" 1, W"', —0, 5 4'1,07t7�'IoroC try, `f%5 1�*4 Brentwood City Lirnuts 'art mrwood Dainty C', PROJE( > SITELL N Iff, no BALFOUR SAI :OUR —ROAD V ta.c A,�d A4.40's Rg,8 Conlune It Avenue ', wt cost At D Avenue Eureka Avenue ' Payne Avenue pavne Avenue Co,,cord AveIve Concord Affm.. rax. 1/2 Mile Mich6el Paoli . 1: and GENERAL LOCATION Associates JA of SI- r r I l.P 4 ( is 9•j 4 ` , - ' Li {L '� ( 4 �, L • i : i 6 0 'l�rr t y .2 r 4 t i t c7Sj �� 2 { e" 1 4 • d � � � � � y � rr � 4 e � L110 2 Z � o * t S m` of : � * � � � 0 � • ! s1i � 11 1�- 3y Yv^""""0 �V+ Y ti .i '+ ,f� �. i!' `^ry J ..�, Hsi P`�vYJ ''3`•' i 7� � }! �✓ r�.rt.V"�`4t }` '' i•4 •�S�dJ '�; r {'�i�Y Off'°"� ' `..�.�r ��,1 �jti''�'�a��. �{ �,�,..'' h.:,rrl�'• A. �+/..�. ..r� t� ct�� Y � �t� �` �i', • ✓j tyr...rJ n„✓ tr• ��.jr={}+. r1''�'t '.,r ' •' '�. � 5a5•t :,f,5 yry, ✓•$, "��' ���!1.]��1�` i "`L/� +,.+"'..• i•i i;�y � at'},.J� .�✓ �.i ` t'+'.,+� `'.0_- 5.1{i��' * •i'+as` .'x ���f 4 ,.,..f '4 t 'v' r.i a y i�, ,t �i ` g• 1. i \4s.c r .r `� �"`.'.Y. iy+•:.• t 1 �'"r'�'. �5 y L .{' � i 4 r5 •� � � ,fit. • t Q��ff�j, 1a ¢ � ,. "" '"•;j;i� ;.� .r��J, j `�a�a *•','+r ...1 `p:s r �'I,« .r it •{�` ,Y .,4/+ {.. -� t ati V Y •,••'{..vy,✓I iwr-"1".•I 'i fy t � � fid' •„`'' t EXISTING SPHPS OF INFLUENCE B oncord q Co IRoad a ! t / r r f i f ✓ 1!y , r ✓ J Avenue Area ea EXIST ING TTTTT J J \ 4 R \ \ R i� `J�r RO\r\f Rf\t\1\/\t\f\rR�R,\J\✓�j i� JRA f fRl\!\/R \ \ ♦ \ \ / fR\(I r f r r . \ \ \ R R R \ter t\�,.\.,✓`�,:i }TTT \ \ \tR J\l\J ! J ♦ J A i \' !`j�,\✓\f CITY LIMIT i i JRJRf\f\ ♦ �i ! �T10S Site \f\l ♦ r f f J t�f \ 111 \ \ ♦ ♦ \ ! J �� \ \fRfRr\�RyRJ r J f R ♦ +C ♦ ♦ R R \ �t � \ ,4f\✓\ f.kr♦tie .��'+ p� e 'i� owned by Contra =° f r4 c Concord Flood Control and Wa :l Conservation District Avenue r� Area •� J r iR�..a 1�1I vr.r\r\JRr.raf\rR �� R `'RJ+tRf�fRr fRr\♦t}{i •. t'\r\tRfRf\/4f1!\t\!\J�f\♦\t f ♦ i �.f\f\fii`.\ f\I4IR/�!\/4l\t\r R'♦ �� � \ tiwr'� r\i\J'R✓R✓ f'�fR`I`l�f�t\r,J\l.. Brio V*alley Project Area Boundary t i •� I x� � 1tE3' � i Michael Paoli PR�3JECY LOCATION and Associates BALFOUR ROAD UMD ©s -7nN GOLF ULD , _ s r.t. tCC 0 2:C a�C COUR UMD NC � � }>> CIS m ULD } aS, 1 UHD PEC t PR I ! i i � ULD GC \ � � os W 0 1� �- r ! - `` 1ifs J \ULD s 33 1 a '�,�,• us -� fir` +� PF D x Os Il Ii W ULLD - --'"� \` \ S I .< ULD �A ! �` j \ � ULD 1� I •©s os i ULD CSS � GC ULLD GOLF COURSE ! \ PEC I ,. CIS os ULD\ 110 j ULD �/ � ULD os GOLF COURSE / ULD � Ds! �,�._,,• J ULD / as / os" UR os GOLF COURSE ULLD F3ICoN1Es LEGEND ACRES � ULLD URBAN LOW-LOW 25,8=AC ULD URBAN LOW 226.0=AC UMD URBAN MOCERATE 36.9`AC UHD URBAN !UGH 19.9=AC Ds NC NEIGHBORHOOD COMMERCIAL 14.7=AC PEC PLANNED EMPLOYMENT CENTER 54.4=AC PF PUBLIC FACILITY ow cAm) 1.5=AC S SCHOOL 10.0=AG OS OPEN:SPACE - 296.2=AC PR PARKIRECREATION 16.7=AC UR URBAN RESERVE 36.13®AC ROADS 1 1.8_AC TOTAL 750.7=AC GENERAL PLAN LAND RVINERS USE CATEGORIES ���'� C�L�C�I�3INC SEPTEMBER 1991 A. G. SPANOS COMPANY INC. 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City of Brentwood EIR File No. 90-2 Prepared for: City of Brentwood 708 Third Street Brentwood, California 94513 (510) 634-6905 Prepared by: Michael Paoli and Associates Environmental, School Facility, and City Planning 600 West Shaw Avenue, Suite 240 Fresno, Califomia' 93704 (209) 224-4806 In association with: Donald Ballanti Brown-Buntin Associates, Inc. DKS Associates William P. Jordan, Ph.D. and R. James .Brown, Ph.D. February 1992 PREFACE This EIR presents a comprehensive assessment of the potential environmental impacts of the proposed A. G. Spanos Brentwood Hills Country Club,project. The EIR is divided into 25 sections, each of which presents information that is required or may be included in an EIR under the California Environmental Quality Act (CEQA) Guidelines. Section A presents a summary of the findings of the EIR. Section B provides a description of the project and its location. Sections C through U present the existing setting, potential impacts, and recommended mitigation measures for the project. Section V discusses alternatives to the project. Section W addresses cumulative impacts and the relationship between short-term uses and long-term productivity. Section X identifies the significant irreversible environmental changes associated with the project. Finally, in Section Y, the growth-inducing impacts of the project are described. There are eight appendices to the EIR.. Appendices C-1 through U-1 provide background or technical information for resources and conditions that are addressed in the ETR. Appendix I lists the consultants who prepared the EIR, and Appendix 2 lists the sources that were consulted in the preparation process. Michael Paoli and Associates i TABLE OF CONTENTS Page SECTION A SUMMARY A 1 SECTION B - PROJECT LOCATION AND DESCRIPTION Project Location B - I Project Description B - 1 Project Phasing B - 11 Intended Uses of EIR B - I 1 SECTION C LAND USE SETTING, IMPACTS, AND MITIGATION MEASURES Setting C - 1 Project Impacts and Mitigation Measures C - 6 Cumulative Impacts and Mitigation Measures C - 27 SECTION D AGRICULTURAL RESOURCES SETTING, IMPACTS, AND MITIGATION MEASURES Setting D - 1 Williamson Act Contract Cancellation Findings Discussion D - 6 Project Impacts and Mitigation Measures D - 9 Cumulative Impacts and Mitigation Measures D - 12 SECTION E TOPOGRAPHY, GEOLOGY, SOILS, AND SEISMIC HAZARDS SETTING, IMPAC'T'S, AND MITIGATION MEASURES Setting E - 1 Project Impacts and Mitigation Measures E - 8 Cumulative Impacts and Mitigation Measures E - 18 SECTION F BIOLOGICAL RESOURCES SETTING, IMPACTS, AND MITIGATION MEASURES Setting F - 1 Project Impacts and Mitigation Measures F - 10 Cumulative Impacts and Mitigation Measures F - 13 Michael Paoli and Associates SECTION G TRAFFIC AND TRANSPORTATION SETTING, IMPAC'T'S, AND MITIGATION MEASURES Setting G - 1 Project Impacts and Mitigation Measures G - 13 Cumulative Impacts and Mitigation Measures G 26 SECTION H.. AIR QUALITY. SETTING, IMPACTS, AND MITIGATION MEASURES Setting H - 1 Project Impacts and Mitigation Measures H - 6 Cumulative Impacts and Mitigation Measures H - 13 SECTION I NOISE SETTING, IMPACTS, AND MITIGATION MEASURES Setting Project Impacts and Mitigation Measures I - 5 Cumulative Impacts and Mitigation Measures I 13 SECTION J STORM DRAINAGE AND FLOOD CONTROL SETTING, IMPACTS, AND MI'TIGATIO'N MEASURES - Setting J - I Project Impacts and Mitigation Measures J - 2 Cumulative Impacts and Mitigation Measures J - 5 SECTION K WATER SUPPLY SETTING, IMPACTS, AND MITIGATION MEASURES Setting K - 1 Project Impacts and Mitigation Measures K - 2 Cumulative Impacts and Mitigation Measures K - 3 SECTION L WASTEWATER COLLECTION, TREATMENT, AND DISPOSAL SETTING, IMPACTS, AND MITIGATION MEASURES Setting L - 1 Project Impacts and Mitigation Measures L - 2 Cumulative Impacts and Mitigation Measures L - 3 Michael Paoli and Associates iii ....................................... t , SECTION M SOLID 'WASTE SETTING, IMPACTS, AND MITIGATION MEASURES Setting M - I Project Impacts and Mitigation Measures M - I Cumulative Impacts and Mitigation Measures M _ 3 SECTION N HAZARDOUS CONDITIONS SETTINGS, IMPACTS, AND MITIGATION MEASURES Setting N - 1 Project Impacts and Mitigation Measures N - 7 Cumulative Impacts and Mitigation Measures N - 11 SECTION O LAW ENFORCEMENT SETTING, IMPACTS, AND MITIGATION I41EASURES Setting O " ` I Project Impacts and Mitigation Measures O - 1 Cumulative Impacts and Mitigation Measures 0 - 2 SECTION P FIRE PROTECTION AND EMERGENCY SERVICES SETTING, IMPACTS, AND MITIGATION MEASURES Setting P - 1 Project Impacts and Mitigation Measures P - 2 Cumulative Impacts and Mitigation Measures P - 3 SEC'T'ION Q SCHOOLS SETTING, IMPACTS, AND MITIGATION MEASURES Setting Q - 1 Project Impacts and Mitigation Measures Q - 2 Cumulative Impacts and Mitigation .Measures Q - 4 SECTION R PARKS AND RECREATION SETTING, IMPACTS, AND MITIGATION MEASURES Setting R a I Project Impacts and Mitigation Measures R - 2 Cumulative Impacts and Mitigation Measures R o 3 Michael Paoli and Associates iv SECTION S ENERGY SUPPLY AND USAGE SETTING, IMPACTS, AND MITIG,A.TION MEASURES Setting S - 1 Project Impacts and Mitigation Measures S - I Cumulative Impacts and Mitigation Measures S 4 SECTION T . AESTHETICS AND VIEWS SETTING, IMPACTS, AND MITIGATION MEASURES Setting T - 1 Project Impacts and Mitigation Measures T - I Cumulative Impacts and Mitigation Measures T - 5 SECTION U CULTURAL RESOURCES SETTING, IMPACTS, AND MITIGATION MEASURES Setting U - I Project Impacts and Mitigation Measures U - I 1 Cumulative Impacts and Mitigation Measures U - 15 SECTION V ALTERNATIVES TO THE PROPOSED PROJECT General V I Description of Specific Alternatives V - 6 Identification of Environmentally Superior Alternative V - 14 SECTION W RELATIONSHIP BETWEEN SHORT-TERM USES AND LONG-TERM PRODUCTIVITY/ CUMULA'T'IVE IMPACTS Introduction W - I Cumulative Development Scenario W - I Summary of Significant Cumulative Impacts W - 3 SECTION X SIGNIFICANT IRREVERSIBLE ENVIRON- MENTAL CHANGES X - 1 SECTION Y GROWTH-INDUCING IMPACTS Introduction Y - I Public Land Use Policy Considerations Y - I Availability of Urban Services/Infrastructure Y - 2 Geographic/Environmental Constraints Y - 3 Economic Growth in the Community Y - 3 Michael Paoli and Associates v ...................................................................................... APPENDIX C-1 PRELIMINARY LAND USE ELEMENT OF THE BRENTWOOD GENERAL PLAN UPDATE APPENDIX Fil REPRESENTATIVE BIOTA APPENDIX H-I AIR QUALITY MODELS APPENDIX I-I ACOUSTICAL TERMINOLOGY APPENDIX I-2 FHWA HIGHWAY TRAFFIC NOISE PREDICTION MODEL INPUTS APPENDIX U-1 GOODYEAR'S SECOND REPORT APPENDIX 1 AUTHORS OF THE EIR APPENDIX 2 SOURCES CONSULTED Michael Paoli and Associates vi 3 ' 1 LIST OF FIGURES Page FIGURE B-1 REGIONAL LOCATION B 2 FIGURE B-2 GENERAL LOCATION B - 3 FIGURE B-3 PROTECT LOCATION B - 4 FIGURE B-4 PLANNED DEVELOPMENT LAND USE PLAN JULY 1991 B - 5 FIGURE B-5 GENERAL PLAN LAND USE CATEGORIES SEPTEMBER 1991 B - 6 FIGURE B-6 PLANNED DEVELOPMENT PROJECT PHASING (ESTI.MATED) JULY 1991 B - 12 FIGURE C-I EXISTING LAND USE C - 3 FIGURE D-1 TYPES OF SOIL ON PROJECT SITE D - 2 FIGURE D-2 PRIME FARMLAND IN THE BRENTWOOD AREA D - 4 FIGURE D-3 LANDS HELD IN AGRICULTURAL CONTRAC'T'S D - 5 FIGURE E-1 PLANNED DEVELOPMENT TOPOGRAPHY/ PHOTOGRAPHY JULY 1991 E - 2 FIGURE E-2 GEOLOGY MAP E - 4 FIGURE E-3 REGIONAL FAULTING AND SEISMICITY E - 7 FIGURE E-4 LOCATION OF MINING AREAS E - 16 FIGURE F-1 BIOLOGICAL RESOURCES F - 5 Michael Paoli and Associates vii FIGURE G-1 REGIONAL ROAD NETWORK. - G - 2 FIGURE G-2 STUDY INTERSECTIONS G - 6 FIGURE G-3 PEAK HOUR TRAFFIC VOLUMES EXISTING CONDITIONS G - 7 FIGURE G-4 TRIP DISTRIBUTION PERCENTAGES G - 18 FIGURE G-5 PEATY HOUR TRAFFIC VOLUMES EXISTING PLUS PROJECT G - 19 FIGURE G-6 FUTURE ROADWAY IMPROVEMENTS G - 28 FIGURE G-7 2005 CUMULATIVE WITHOUT DELTA EXPRESSWAY G - 30 FIGURE G-8 2005 CUMULATIVE WITH DELTA EXPRESSWAY G - 31 FIGURE 1-1 PROTECT SITE I - 2 FIGURE 1-2 HOURLY NOISE LEVELS OCTOBER 24-25, 1991 I - 3 FIGURE I-3 LAND USE COMPATIBILITY FOR COMMUNI'T'Y NOISE ENVIRONMENTS I - 7 FIGURE I-4 EXISTING PLUS PROJECT NOISE EXPOSURE CONTOURS I - 10 FIGURE I-5 EXISTING PLUS PROJECT NOISE EXPOSURE CONTOURS I - 11 FIGURE I-6 CUMULATIVE NOISE EXPOSURE CONTOURS WITHOUT DELTA EXPRESSWAY T - 14 FIGURE 1-7 CUMULATIVE NOISE EXPOSURE CONTOURS WITHOUT DELTA EXPRESSWAY I - 15 F Michael Paoli and Associates viii FIGURE I-8 CUMULATIVE NOISE EXPOSURE CONTOURS WITH DELTA EXPRESSWAY 1 - 17 FIGURE I-9 CUMULATIVE NOISE EXPOSURE CONTOURS WITH DELTA EXPRESSWAY 1 - 18 FIGURE T-I PROJECT SITE SELECTED VIEWS T - 6 FIGURE T-2 PROJECT SITE SELECTED VIEWS T - 7 FIGURE T-3 TENTATIVE SUBDIVISION MAP GRADING AND DRAINAGE PLAN (NORTH) JULY 1991 T - 3 FIGURE T-4 TENTATIVE SUBDIVISION MAP GRADING AND DRAINAGE PLAN (SOUTH) JULY 1991 T - 4 FIGURE U-I CULTURAL RESOURCES LOCATIONS WITHIN PROJECT AREA U - 2 FIGURE U-2 BLACK DIAMOND MINE ENGINE PLATFORM U - 6 FIGURE U-3 DIAGRAM OF A CORNISH PUMP WORKS U - 7 FIGURE U-4 VIEWS OF BRENTWOOD COAL MINE SITE CA-CCO-480H U - 17 FIGURE U-5 VIEWS OF THE BRICK AND CONCRETE FEATURE, CA-CCO-61 I H-A U - 18 FIGURE U-6 CA-CCO-480H SITE BOUNDARY U - 12 FIGURE V-I MODIFICATIONS REQUESTED BY THE PLANNING COMMISSION V 3 FIGURE V-2 ALTERNATIVE SITE SELECTION V - 4 Michael Paoli and Associates ix FIGURE W-I MAJOR PROJECTS INCLUDED IN CUMULATIVE SCENARIO W - 2 Michael Paoli and Associates x LIST OF TABLES Page TABLE A-1 SUMARY PROJECT DESCRIPTION A - 2 TABLE A-2- SUMMARY OF IMPACTS AND MITIGATION MEASURES A - 4 TABLE B-1 PUBLIC UTILITIES AND SERVICES B - 10 TABLE C-1 PROJECT CONSISTENCY WITH APPLICABLE BRENTWOOD GENERAL PLAN LAND USE POLICIES- C - 12 TABLE C-2 PROJECT CONSISTENCY WITH APPLICABLE CONTRA COSTA COUNTY GENERAL PLAN LAND USE POLICIES C - 20 TABLE E-1 ESTIMATED SOIL PROPERTIES FOR SOILS LIKELY TO BE EXCAVATED AT THE PROJECT SITE E - 5 TABLE E-2 ACTIVE AND POTENTIALLY ACTIVE FAULTS MOST LIKELY TO AFFECT THE PROTECT AREA E - 9 TABLE E-3 PROBABILITY OF EXCEEDANCE FOR. MAGNITUDE E - 10 TABLE G-1 LEVET,.. OF SERVICE DEFINITIONS SIGNALIZED INTERSECTIONS G - 8 TABLE G-2 LEVEL OF SERVICE CRITERIA UNSIGNALI.ZED INTERSECTIONS G - 10 TABLE G-3 INTERSECTION V/C RATIOS AND LOS EXISTING CONDITIONS G - 11 TABLE G-4 ESTIMATED TRIP GENERATION BRENTWOOD COUNTRY CLUB G - 15 Michael Paoli and Associates xi .... ........................ TABLE G-5 INTERSECTION VIC RATIOS AND--LOS EXISTING PLUS PROJECT CONDITIONS G - 20 TABLE G-6 TRAFFIC IMPACT ON REGIONAL ROUTES EXISTING PLUS PROTECT G - 24 TABLE G-7 • LOS SUMMARY CUMULATIVE SCENARIOS G - 32 TABLE G-8 INTERSECTION VIC RATIOS AND LOS EXISTING PLUS PROJECT CONDITIONS WITH INUTICATIONS G - 34 TABLE G-9 LOS SUMMARY - CUMULATIVE SCENARIOS EFFECT OF MITIGATIONS WITH AND WITHOUT-DELTA EXPRESSWAY G - 35 TABLE G-10 REGIONAL HIGHWAY TRAFFIC LEVEL COMPARISON WITH AND WITHOUT DELTA EXPRESSWAY - PM PEAK HOUR G - 50 TABLE H-1 FEDERAL AND STATE AMBIENT AIR QUALITY STANDARDS H - 2 TABLE H-2 AIR QUALITY DATA FOR PITTSBURG AND BETHEL ISLAND 1988-1990 H - 4 TABLE H-3 EMISSION RATES FOR. DIESEL- POWERED CONSTRUCTION EQUIPMENT H - 7 TABLE H-4 WORST CASE CARBON MONOXIDE CONCENTRATIONS, IN PPM H - 10 TABLE H-5 PROJECT-RELATED REGIONAL EMISSIONS IN POUNDS PER DAY H - 12 TABLE I-1 SUMMARY OF MEASURED AMBIENT NOISE LEVELS I - I TABLE I-2 COMPARISON OF FHWA MODEL TO MEASURED NOISE LEVELS I - 4 TABLE I-3 :EXISTING TRAFFIC NOISE LEVELS I - 5 Michael Paoli and Associates xii TABLE 1-4 CITY OF BRENTWOOD CURRENT- NOISE LEVEL STANDARDS I - 6 TABLE 1-5 SUBJECTIVE REACTION TO CHANGES IN NOISE LEVELS OF SIMILAR SOURCES I - - 8 TABLE 1-6 FUTURE TRAFFIC NOISE LEVELS I - 9 TABLE 1-7 CONSTRUCTION EQUIPMENT NOISE I - 13 TABLE M-1 SOLID WASTE GENERATION FACTORS FOR CONTRA COSTA COUNTY M - 2 TABLE Q-1 BRENTWOOD UNION AND LMERTY UNION HIGH SCHOOL DISTRICTS CAPACITIES AND ENROLLMENTS AS OF OCTOBER 1991 Q - 3 TABLE Q-2 TOTAL STUDENTS GENERATED BY PROJECT Q - 3 TABLE S-1 ENERGY DEMAND S - 2 Michael Paoli and Associates xiii ....................................................................................................................................... SECTION A SUMMARY Tables A-1 and A-2 constitute the summary section of this FIR. Table A-1 provides a summary description of the proposed project .in outline form. Table A-2 summarizes the potential adverse environmental impacts associated with the project, the measures that have been, identified to mitigate the impacts, and whether the impacts can'be mitigated to a level of insignificance. Table A-2 also includes a summary of the significant unavoidable impacts, a summary of unresolved or controversial issues associated with the project, and a summary of the project alternatives. Michael Paoli and Associates A-1 TABLE A-I SUMMARY PROJECT DESCRIPTION Name of Project: A. G. Spanos Brentwood Hills Country Club State...Clea 'jug o Number: 91013066 City of Brentwood ETR File-Number: 90-2 ame of Applicant: A. G. Spanos Land Company, Inc. Lead Agency: City of Brentwood Responsible Agencies: Contra Costa County Local Agency Formation Commission (LAFCO) State of California Department of Fish and Game Contra Costa County Flood Control and Water Conservation District East Contra Costa Irrigation District Brentwood Recreation and Park District Location __of_Proj ecct: Southwest corner of Balfour Road and Concord Avenue, immediately southwest of Brentwood, California Area of Project Site,: 750.7 acres A-2 Michael Paoli and Associates Llys iib, of j. nits , Foo a Neighborhood Commercial 14.7 160,100 Planned.Employment Center 54,4 710,900 Cluster Residential 31.2 420 Single Family Residential 277.4 1,202 School Site 10.0 Park Site - 16.7 :Day Care Center 1.5 Golf Course 211.0 Open Space 85.2 Urban Reserve 36.8 Streets and Interchange 11-S TOTAL: 750.7 1,622 871,000 Population and EMDJOYment: Estimated Population: 4,957 Estimated Employment: 1,456 Public Facilities ajid S .tvi .est Pot le Water: City of Brentwood Irn ation Water: East Contra Costa Irrigation District Wa t�ewater: City of Brentwood Flood Control and Drainaze: Contra Costa County Flood Control and Water Conservation District and City of Brentwood Solid Waste: Brentwood Disposal Service wnforcement: Brentwood Police Department Fire Pro ection .rgepc�L Servicee: East Diablo Fire Protection District Schools: Liberty Union High School District Brentwood Union School District Parks and Regrea 'on: Brentwood Recreation and Park District I rrr : Contra Costa County Public Library EIr,cmcit.y-and .,as,: Pacific Cas and Electric Company 'l'eleohone: Pacific Bell streets: City of Brentwood Rul#i ..Pej: i :s and. A rp ovals= General Plan Amendment Zone Reclassification Preliminary and Final Development Plans Vesting 'Tentative Map Use Permit for Country Club Development Agreement Annexation Application 89-4 Capital Improvement Financing Program Cancellation of Agricultural Preserve Contract No. 12-76 N ichael Paoli and Associates A-3 SECTION B PROJECT LOCATION AND DESCRIPTION 1 . PROTECT LOCATION The project site is composed of 751 acres located at the southwest corner of Balfour Road and Concord Avenue, immediately southwest of the City of Brentwood, Contra Costa County, California (see Figures B-1 and B-2). Brentwood, located along State Highway 4 in the eastern portion of Contra Costa County, has an estimated population of 8,255 (State Dept. of Finance, 1991). Portions of the east and north boundaries of the project site are adjacent to the current City limits. Approximately 577 acres of the 751-acre project site are owned by the Applicant, A. G. Spanos Land Company, Inc. (see Figure B-3). The remaining 174 acres within the project area are under separate ownership, including 144 acres located between the Spanos property and Concord Avenue and about 30 acres which are owned by the Contra Costa County Flood Control and Water Conservation District. Although not owned by the A. G. Spanos Land Company, this land has been included in the land use plan to demonstrate a potential integrated master plan for the entire project area.B-1 The location of the project site can be described further as Section 22 and a portion of the north half of Section 27 (part of the Los Meganos land grant) of Township 1, Range 2 East on the 7.5' Brentwood, California United States Geological Survey map (1978). 2 . PROTECT DESCRIPTION a. General The 751-acre project site will include residential, commercial, educational, and open space uses (see Figures B-4 and B-5). Approximately 313 acres (42 percent) of the project site will be in open space (golf course, open space, parks); 309 acres (41 percent) in low, medium, and high density residential uses; 69 acres (9 percent) in commercial or office uses; 37 acres (5 percent) in urban reserve; 11.5 acres (less than 2 percent) in educational use (school and day care center); and 12 acres (less than 2 percent) in major streets and interchanges. Open space and residential uses will occupy 622 acres, or B-1For purposes of clarity, the 577 acres encompassing the Spanos project will be referred to as the ,Spanos site", the additional acres that are being included in the project, excepting the Flood Control District property, will be referred to as the "Concord Avenue.area", and the total of 751 acres that will be addressed in this draft EIR will be referred to as the"project site"or"project area". All of the project site is proposed for annexation by the City of Brentwood except for the 37-acre portion of the project site proposed to be designated as Urban Reserve. Michael Paoli and Associates g_1 TOla6 NORTH TO REDOING TO SACRAMENTO i0# TO NAPA #{ YwwMw S¢x L , Solana County fiMiW •iwiwi TO NOVATO fx�``4+/'" w�i9?��4#s' x��� 'M•i�iiw�► TO 1.00t pit t SAN RAPAELBREMWOOD i'Marnf irw .. �wwiwi,ht apa��3 aw.i" «,,,arra WMar Gw.w TO STOCKTON t } Contra Corm County �i.. ••i,w+iwni i'{b jaow.w a..ia ### fi fn A— TO SAN xs PRANC1SCO !SF "' TO STOCKTON v�rti� � ..�' 'r �f 6rMN jliiw�wrR ��Y Alameds County . it ix Aiy. TOSAP# MATEO t 4,{ i g� ? TO MENLO PARK a TO SAN JOSE „ + Source: C.mgj!CgS.a County-Gengm 'lt n I M-2005 t Michael Paoli and REGIONAL. LOCATION FIGURE B-1 Associates ..m LONE TREE I'' WAY I LONE r TREE I WAY15 11 _v l )J,•k� V ?. ( cc k j Sun' r v' k w 1$V- L � t ! # tfKI K, , Srt t Z cs k ,k tit vZ. C11 MNERad 1t I :'r I+� �)y StL.',5�'? J+•:(.'' 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'�`��Sp6 tt1n.V'tl, �+/{ 1!•E` 1 - _J tls 9 ♦ 9 y Y1 }} rv�� wavu+ ,vr a'ts G ntre-t•dlyd; Dalnt a ""`°` i"' {owTIwr ' Avenue iad *� 'Bnnrnoed 1 v µ3 da =50r. 1\ t Oak i�� \t C• /Z O C.�rv1�` ate. 4wvMrry I m YtL YQNI Nftl h� a.C'irov riNf t w 'C 3 a ttwM.". +Q i/R.r LLtal.iCM06i, PROJECT as ,.._�'_) i c>.rwoao 1 V 3 1 1J I g,' iWl DI. ate( CX "p. ♦ ` YMl a"DISI d/, � • tdL �/ 0 \ PadN'tyfaan' ha Pari y�' f�OAa1N SCHOOL SALFOURL', ROAD $$ �c BALFOUR ROAD a c Y Madrana` non AiaNt K w1a Prean LVe. tlr4imm . r afy+ll ! � ""• ` 3uDd.Ad.8 y Continenle I Avenue ( �'// J;Car COA rld Ca1ra K 1 /} 1rrt8eNan IIutrter N_ r—_— :YI '•t• k Eurmkt Avenue Eureka - Avanut t 1 E ..�.�. Payne Avenua Payne 'Avenue riones Concord Avenue Canard Avenue 1" =Approx. 1/2 ivl.ile Michael Paoli and GENERAL LOCATION FIGURE B-2 Associates ............................ t AL EXISTING SPHERE � GP INFLUENCE . �,,-�'�`.`.. ►'.J_--- - Balfb a 1L r♦iii\ ti4��/it\r\✓\tYl�f ConcorP��^y!�fY (`fit \ 1 \ ♦„i J\r♦rY,♦f♦,iti/"y f l;.= J`r`>hi♦,♦�ilhtilif`fir`f`! Avenue t\r♦i♦+♦�r ! �rh/h \ ♦ \ \ i i Y \ \ i i ✓\' '» Area YtJ♦ �`�`�\yY,h�♦��jit � iri/\tip f♦+hrilirh!\ti/h/i+\fi! \ 'Y!♦fh!'","'�!♦!"`f�t�/♦r\li+hiif~+\+ ♦ \ ♦ ♦ \ ♦ \ h \ i i 4 i \ ♦ w Y \ ♦ h h i \ \ \ \ 1 \ \' '\ \ R �Y>♦il i , t t f> / ! i i „ r i t • ``i i%>y+ ♦, i\th ih>\+,t +h+♦+irir��. ( ✓i>`i\i\✓\>♦. ♦ ! ♦i\✓\+ii'l ri fi Jlli✓ R EXISTING 4 ♦ \ i \ \ t • `:`�` ' ` CITY LIMIT R 4 i ♦/i! ,'ano ifh/i/i/\ i14f 4f/+�t 't R� ?.J� III N11 i i hfi i / 'tt.t;t=ttt,.at. i is,�✓♦r}c • tai tiF IIt � sltfi i ♦ \ \�t • ed b Contra Costa ern Y r Cuter , CQnco Flood Control. and i District Avenue • Conservation Area R t t -t taa= t ti:i`iiii=t?:Y ltt t(St♦ h+\+♦ . i Irt - tt..,t°t;4 P a a't -•trt�M J i ! ! f ! - +r� yy��...ii i11i1�'�'ai I'+lr ii'�r {t°t.; inti \ h ♦ i ♦ ♦ \ ! , T♦>`Jh!\/\>\,if♦J\1�l�tt,,,e.�/ilhllrilil ii ! /i/ /\i'4/,ri!`J R 4 Ito i `/hI♦,hJ♦!`r`/\!`>\f` ✓♦tiJ'i/hr♦�\l`i♦i\!\,h/hlir ✓ / * • , R R • 'Y /1#✓ ,i,�l+f«�`+�+i i 00 R * t ' Briones,Va Project Area Boundary R t lit 1000, 40 Michael Paoli PROJECT LOCATION FIGURE 8-3 a and Associates t � a�y.;. .. o ` � ,....,._�,%-.+�r�l.�... �+',;'.arra •• rMycr �--.^`=`� 'Jct !�• - _.i1E E •^ •`� -lc, '`� ♦�.\ �:y�,ty ',•�.".v � ,i k t , f Y 1 , f 1` �..•�/� y �7µ •�y � � i . •,y •.� TY `;-'. �.',oQ at .\y-!4 .t. t ',., t �;'�/ �:+-�� Idi`y �1,,J. �'�' fol r 1 i.-, ! �••1 ... RR `il(J , \10,t,ta. �. t Aft .! �.'�(�.�.,{ .u��' `.� +,� r .('J`h1 ...1 .• � 1.: 1 t+i" ��. ��V` , "'.�T.{ 1' j` '4'1 1 ��/> t 1 l�`` 0 � �t,�>�'iti ,'� ��I Opti"'" � Idf� � ���:"'� ��1 '�� �J• •Z,•`s 1 to t 'i .{{+��, n,.ti v �1 r+ 1 ��. + �r ,i�i'f I � •�.:,1./ •� ' -- "'• „^Y,r YG �.��?•� ! �� '�, '..L ,'fit •'•p4. ,��j' �i, �i 5.41'fl L'7Cs� '; �!�i { `. �+ �, n ��•' I I { y i it i � , �' ot rrr r � � � .� , .t a '�'"''••� �-••�^- ' 1 n, `, , � :� : m < m V LJLi�I !fix f � .J LjU �y.�l��• � � ,� M � iii � � � * � � � � m �- ! f 3 R a 1z c m of �r r r i I m ` > D � LQJ n TIM##lrxfx i r (gip �" YIvai; x an 4„Im a is s_ •: r:a D 4 e •� � ItC i St i i fit a { e r iI rii a 12 ii k fi k k k i BALFOUR ROAD _ ULD SCALE N FEET as a xao wo GOLF NC COURSE UMDE,, Zos' JIM ULD UHD PEC i I � os � PR j ULD GCS CSS0 Ila / •' t7 L� 11 a � �. I ULD ULLD ` ULD d5 os as ULC? ,,."'� GC JILL I7 GOLF COURSE � � � N os` � � U �` � � � LD aCL U � ' {' ULD a os GOLF COURSE � ULD`"` •., ,�' ULD CS ULD os cis � .��..��... ..�--�' ,�'` .�-� UIQ ` os GOLF COURSE ` yo b, ULLD URBAN LOW-LOW 25.8_AC t ULD URBAN LOW 226.OtAC / UNID URBAN MODERATE Xg=AC UHD URBAN NIGH 19.9tAC NC NEIGHBORHOOD COMMERCIAL 14.7=AC Cls PEC PLANNED EMPLOYMENT CENTER 54AtAC PF PUBLIC FACILITY (CAY ) 1.5tAC S SCHOOL 10.0=AC OS OPEN SPACE 296.2�-AC PR PARK/RECREATION 16.7:tAC UR URBAN RESERVE 36.8=ACI " Ll" ROADS 11.8�AC TOTAL 750.7=AC GENERAL PLAN LAN 0 REINERS USE CA"TEC30RIES _ INC SEPTEMBER 1001A. Q. SPANOS COMPANY INC. :»n. .u;.:.�:. CITY Of BRENTWOOD,CALIFORNIA 89.26 83 percent, of the site. The proposed golf course will be the major open space feature and will be the focal point of many of the residences. There will be a total of 1,622 residential units within the project area. Residential development will range in density from 3 to 16 units per acre. The overall density for the 309 acres designated for residential use will be 5.3.units per acre and for the entire 751-acre project site, 2.2 units per acre. Access to the project will be from Balfour Road and a new Concord Avenue road alignment west of, and parallel�to, the existing alignment. The project site _ has approximately one mile of street frontage on both Balfour Road and Concord . Avenue. The proposed Delta Expressway will parallel the east side of existing Concord Avenue and will have an interchange at Balfour Road. b. Residential Areas (1) Detached Single Family Units on Individual Lots The Land Use Plan (Figure B-4) encompasses the development of 1,202 single family dwelling units on lots ranging in size from 4,000 to 10,000 square feet. The lots are generally arranged in groupings of similar lot size, separated from other single family residential areas by the golf course or other open space features. The groupings of single family lots in the southern portion of the site are generally located on hilltop areas while the golf course will occupy lower areas between the hills. Primary access to the western residential portion of the project, which includes single family residences and the golf course, will be provided from Balfour Road. The main entrance to the project site will be via a north-south road which intersects Balfour Road in the center of the project's northern boundary. This road leads to the country club. An internal circulation system will connect this road to the various single family residential groupings. Within these residential areas, two-lane, curvilinear roads and cul-de-sacs will provide direct residential access. Primary access to the northeast section of the project, which contains commercial uses, cluster residential units, and the school site, will be provided by Concord Avenue along its new right-of-way. The western residential and eastern mixed- use portions of the project will be connected by a divided, two-lane road running east-west about 1,000 feet south of and parallel to Balfour Road. The proposed Delta Expressway will pass along the eastern edge of the project, immediately east of the existing Concord Avenue alignment. The Delta Expressway is planned to have an interchange at Balfour Road. Michael Paoli and Associates B-7 (2) Muster Residential Units/Low Density The 102 low density cluster residential units planrfed' for the project site are located within the Concord Avenue area outside the boundaries of the Spanos site, They are located in the northeast area of the project site between a cluster of single family residential units to the west and a neighborhood commercial center to the east. The low density cluster residential units encompass a total of 11.3 acres at a density of 9 dwelling units per acre. These units may be built as condominiums. Access to the low density cluster residential units will be provided from a two- . lane street which will connect Concord Avenue with the main project access drive. The units may also be accessed from Balfour Road. (3) Cluster Residential Units/High Density In the northeast section of the site, 318 high density cluster residential units will be located on 19.9 acres of land. The residential density within this portion of the project will be 16 dwelling units per acre. Access to the high density cluster residences will be provided by Concord Avenue and two other streets connecting to Concord Avenue. The high density cluster units will be located adjacent to neighborhood and planned employment commercial center areas (to the north and east), a park site (to the west), and a school (to the south). C. Country Club and Golf Course The ,project includes a country-club and a 211-acre golf course as an integral open space and recreational feature for the site. The country club will provide such facilities as a restaurant, bar, and pro shop. Many of the single family residences will be located either on, or within view of, the golf course. The golf course will be privately owned but open to the public. Four ponds located along the golf course are intended to provide scenic enhancement to the site, as well as collect storm water runoff. Water for irrigating the golf course and filling the ponds is proposed to be obtained from the East Contra Costa Irrigation District. d. School Site and Day-Care Center A school (10 net acres) and day-care facility (1.5 acres) are proposed for an area located in the northeast section of the project site. Access to the school site will be provided by Concord Avenue, as well as from a road extending from Concord Avenue along the school's northeast boundary. In addition, a two-lane road will provide access to the school from nearby residences along the school's southern boundary. B-8 Michael Paoli and Associates e. Park Site A public park site is proposed for an area of 16.7 acres located in the northeast section of the project area. All but about 1.6 acres of the proposed park is located outside of the Spanos site. The park will be accessed from two roads connecting it with Concord Avenue and the western residential portion of the project. The park site will be set aside for acquisition or dedication by the City of Brentwood and maintained by the Brentwood Recreation and Park District. f. Neighborhood Shopping Center and planned Employment Center a (1) Neighborhood Shopping Center A neighborhood shopping center is planned for a 14.7-acre parcel at the southwest corner of Balfour Road and the new Concord Avenue alignment. The neighborhood shopping center will provide basic commercial services to residents of the Brentwood Country Club, as well as to nearby residents. Approximately 160,100 square feet of building area is contemplated for the neighborhood shopping center. (2) Planned Employment Center A total of 54.4 acres in the Concord Avenue area are designated by the land use plan for development as a planned employment center. This land is located along the entire eastern edge of the project site adjacent to the proposed Delta Expressway. The center will include research and development, office, light industrial, and supplemental commercial uses at a floor area ratio (EAR) of 0.30. Approximately 710,1300 square feet of building area are proposed for the planned employment center. The intent of the planned employment center is to provide an employment-intensive land use which will attract local residents, thereby improving the jobs/housing balance in the Brentwood area. g , Public Utilities and Services It is proposed that public utilities and services for the project will be provided by the agencies listed on Table B-1. h. Relocation of Electric Transmission Lines and Underground Pipelines A set of 230 kV overhead electric transmission lines and four underground pipelines (three natural gas and one petroleum) pass through the property on easements of various widths generally in a northwest to southeast direction. The 230 kV electric transmission lines, and the towers that suspend them, are protected by a 205-foot-wide easement. In the northwest portion of the site, the towers and easement are proposed to be relocated such that the easement would Michael Paoli and Associates B-9 TABLE B•I PUBLIC UTILITIES AND SERVICES Utility or Service - ,Agency _ Potable Water City of Brentwood Irrigation Water East Contra Costa Irrigation District Wastewater City of Brentwood Flood Control and Drainage Centra Costa County Flood Control and Water Conservation District and Cit of Brentwood Solid Waste Brentwood Disposal Service Law Enforcement C#y of Brentwood Police Department :Fire Protection/Emergency Protection/EmergencyServices East Diablo Eire Protection District Schools Liberty Union High School District Brentwood Union School District Parks and Recreation Brentwood Recreation and Park District Librgy Contra Costa County Public Library Electricity and Cas Pacific Gas and Electric Company Tele hone Pacific Bell- Streets ellStreets City of Brentwood B-IO Michael Paoli and Associates abut the western properly line and then extend east back to the existing easement in the west central portion of the site. The underground pipelines are proposed to be relocated such that they do not pass under the proposed residential tots, except in the northwest portion of the site where they are proposed to pass along residential side lot lines. These facilities and the potential impacts associated with them are described in Section N, Hazardous Conditions. 3 . PROJECT PHASING The project site is planned to be built in five phases (see Figure B-6). In the first phase, Balfour Road will be widened and the main entry road to the country club will be built, as will three residential access roads. The golf course and approximately 488 single family residences in the northwest portion of the site will be built with this phase. In phase two, the school and park sites will become available for improvement, a residential road in the southeast portion of the site will be built, and approximately 294 homes will be constructed in the eastern portion of the site. In the third phase, several roads will be completed and approximately 306 residences constructed in the southwest portion of the site. Phases four and five will concentrate on development in the Concord Avenue area of the project site, including the construction of cluster residential housing and neighborhood commercial and planned employment centers. The above phasing plan is only a projection. The. actual construction of the project may differ. Except as otherwise noted in this EIR., variations in the timing of construction are not expected to affect the significance of project impacts. 4 . INTENDED USES OF FIR a. Lead Agency - City of Brentwood The City of Brentwood is the Lead Agency for the project and must review and approve the following applications before the project can be developed; • General Plan Amendment Application No. 89-3, to change the designation of the annexation area from AC, Agricultural Conservation, and PEC, Planned Development Center, to Planned Development, to allow development in accordance with the land use plan shown on Figure B-4 and the General Plan land use designations shown on Figure B-5. • Prezoning Application No. 89-9, to prezone the annexation area to PD, Planned Development as shown on Figure B-4. • Preliminary and final development plans. N/tichael Paoli and Associates g_I I nAv I j IWO AALW%O*00"AXIN 4 If low us p. %ail b fill 11 1 yy.1 lit no goot! U-1>Z, LU !!I %bill 7 YY i YYY i 41 H to On Z Z all 0' 'A iN 4 u all .FJ ,;, ------------ z 'SAW 0 4M pill cu Ar 4�. cx;D tA ry .01 Zi I • Testing tentative map application to subdivide the project site in accordance with the Planned Development hgeneral plan and zoning designations. • Use permit for country club (restaurant, bar, pro shop). • Development Agreement. • Annexation Application No. 89-4, to amend the Sphere of Influence of the City of Brentwood and annex the area to the City. • Capital Improvement Financing Program (CIFP 91-1) pursuant to the City's phased development plans. • The project site is subject to Agricultural Preserve Contract No. 12-76, established by Contra Costa Board of Supervisors Resolution No. 76/144, A Notice of Nonrenewal of the contract was filed with Contra Costa County on November 27, 1989, by the property owner, A. G. Spanos Construction, Inc., and accepted by the County on December 6, 1989. The contract will have to be cancelled by the City before the project can be developed. b. Responsible Agency - Contra Costa County Local Agency Formation Commission (LAFCO) The amendment of the Spheres of Influence of the City of Brentwood and other applicable service providers to encompass the project site and the annexation of the site to the City of Brentwood and such service providers would be subject to review and approval by the Contra Costa County LAFCO; therefore, LAFCO would be a Responsible Agency for the project. C. Other Responsible Agencies • State of California Department of Fish and Game - Section 1603 Streambed Alteration Agreement. • Contra Costa County Flood Control District. Approval to use flood control basin for golf course. • East Contra Costa Irrigation District. Annexation to District. • Brentwood Recreation and Park District. Annexation to District. • California Public Utilities Commission and Pacific Gas and Electric Company. Relocation of overhead electric transmission lines and underground natural gas and petroleum pipelines. Michael Paoli and Associates B-13 ............................... • Other approvals and entitlements as may be necessary from local, state, and federal agencies. B-14 Michael Paoli and Associates ,•f l SECTION C LAND USE SETTING, IMPACTS, AND MITIGATION MEASURES 1 . SETTING a. Regional Land Use and Urban Growth The City of Brentwood, situated in eastern Contra Costa County, is on the edge of rapidly expanding urban growth in the San Francisco Bay area. Although still a small, largely agriculturally-oriented community, Brentwood is experiencing substantial development pressure. This pressure stems mainly from rapid economic and job growth that occurred in central Contra Costa County (Concord, San Ramon, Walnut Creek) in the 1980s. The relocation of office- related employment, primarily from San Francisco, to central Contra Costa County, added more than 42,000 jobs to the County between 1985 and 1987. As land for residential development has become more scarce and expensive in central Contra Costa County and the San Francisco Bay area in general, demand for affordable housing has spilled over to the east county, especially the Antioch and Brentwood areas. In 1948, when Brentwood was incorporated, the City had a population of 1,805. By 1977, the City had grown to 3,800 persons and, by 1990, the population had reached 7,060 (Planning Center, 1991). As of January 1991, the City of Brentwood had a population of 8,255 (Department of Finance, 1991). By the year 2005, the City's population is expected to reach 28,400, an increase of 344 percent over the 1991 population (ABAG, 1989). The City of Brentwood is in the process of updating its General Plan. The updated General Plan is intended to provide for growth within the Brentwood Planning area to the year 2020 and a buildout population of between 73,000 and 107,000. The number of jobs in Brentwood is expected to increase from 2,220 in 1990 to 4,450 in 2005 (ABAG, 1989). This 200-percent increase is substantially less than the projected 344 percent population increase, and indicates that Brentwood will increasingly become a bedroom community for Central Contra Costa County and other areas. In .Tune 1991, the City of Brentwood had 3,041 dwelling units remaining to be built within approved residential projects and another 1,132 residential units pending approval within the City limits. The majority of these projects are located west of downtown and east or northeast of the project site. There were Michael Paoli and Associates C-1 an additional 2,278 acres awaiting annexation (including the proposed project), which could ultimately accommodate an additional 6,839 dwelling units (City of Brentwood, 1991). b. Project Site Land Uses Existing land uses on the project site and surrounding area are shown on Figure C-1. The 577-acre Spanos site is open range land, and the primary historical use of the site has been cattle grazing. Improvements on the Spanos site are limited to the following: k • Three natural gas lines and one petroleum pipeline pass underground through the Spanos site. The pipelines are owned and operated_ by Chevron fail Company, PG&E, and Stanpac. (See Section N for further ; information on the pipelines.) • Two sets of PG&E 230 kV electric transmission lines are strung on one set of towers across the western portion of the Spanos site. The towers are within an easement 205 feet in width. (See Section N for further information on the transmission lines.) • Remnants of an old homesite are present in the east-central portion of the Spanos site. • Remnants of an old coal mining operation are present in the southeast portion of the Spanos site in the farm of foundations and subsurface pits and shafts. (See Section U for further information on the coal mining operation.) • A small, concrete-lined irrigation ditch extends along the eastern edge of the Spanos site. The ditch is owned and operated by the East Contra Costa County Irrigation District. The 174-acre Concord Avenue area is primarily open agricultural land, including grazing land and orchards. Improvements within the Concord Avenue area include the following: • A residence and several farm-related structures are located on an 1 I-acre parcel fronting on Balfour Road. • A 58-acre walnut orchard is located at the southwest corner of Balfour Road and Concord Avenue. • Two residences, each with several farm-related structures, are located on separate parcels fronting on Concord Avenue. C-2 Michael Paoli and Associates Y �✓ 4"1,� a r { t r r a : q :•: S•1;:.:• r,.{? ::•vr:!y.''.:v.::'iat.::.::i?{:v ti;:1.::•} .;r,:t..;::.:4:.:. } d•:.,rb+)y .:•1.+•,.�''YS:'t•%4r"r„ :. r.:i•;ir?i?S;`;>v;?,;;' \�, '',�*�.,.�c"'� `r'`,h k'�.Y r.t x r�".�r`� '`��. �.s�r�'+&F,•�'�'�,�`'�� {$�r,t f r 1 : -} •..-�.,.,.,' � t�# \ :,,/"',..�. 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Jr��:M�''�.y m..�:ti:::;t•"h}::{:.,.�, � 1V ' N � � t � `'` t ..Y•':'r-:•{:;;:i�?':: ?�ii:; •� �.�:t"`�<{;�� '�h;�'%t��;�'`'•�'..� ''t 'at• 3.3; 4 LL, GTS +t fft,.r ,Sre:c•'z.ra x, } `, ��nfis' ,✓ m 1r--"' � ..... + t� N Ft f}r ryknm4.✓,t,,,.:., �! ��)f,�, k s m /jp 4� '.•,.., $i'rt fiS'�•Jr..•.,i'°?v�`4 tv "t ,;;'{ 7rifFb+'i'''$:.,;.\:;.`n:::$ ;';:5'kr' `�--••.._/ jff��\tom },\ r _.s (\'\�\\ ; ✓ I ZS T {}Vr, a t � _. ��,y`::y "--._... � � .� i t � fir•::�°" .,,,,�,., y.^-.'•_�1 �'"`J t k ,� `` �156 11 �{w $ ' i MW low �.40'► Gas` .FUmping Station Ww Cropland .} P 4 Remains of Abandoned Farmhouse ..tt `�. •�. Rangeland " . Residence/Farm Building . 230 Iry Electric Transmission Line Former Mining Area Underground Pipeline Easement . � . , t,r . . . . . Residential Area > Flood Control Dam' lam 1 Brentwood Gun Club •._• _•, , Fled Control Property 2 Storage Building 00•r Project Site Boundary 3 Abandoned Cattle Operation 1" r Approx, 1J3 M.le Michael Paoli and EXISTING LAND USE FIGURE C-1 Associates • A vacant storage building is located along Concord Avenue, near the south end of the Concord Avenue area. • A flood control channel with two earth darns is located in the southeast quadrant of the project site. The flood control channel and darns are operated and maintained by the Contra Costa County Flood Control District. The dams and portions of the channel are on land owned by-the district; the remainder of the channel is within.a flood control easement. c. Surrounding Land Uses The project site is in a rural setting, with range land to the south and west and crop and range land to the north and east. Development in the immediate area is limited to the Brentwood Gun Club located east of the site and Concord Avenue, and remnants of a cattle operation located west of the site. The nearest existing urban development is about three-quarters of a mile east of the project site, between Fairview and Minnesota Avenues, in the City of Brentwood. Downtown Brentwood is about two miles east-northeast of the site. r The City is processing proposals for large-scale development projects on the land immediately north, northeast, and east of the project site. The 433-acre Hancock project is proposed for development north of the project site, and the 369-acre Blackhawk/Nunn project (Brentwood Lakes) is proposed for development east and northeast of the site. The two projects would have a total of 1,966 residential units, together with commercial and other uses. (See Section W for additional information on the location and composition of the projects.) d. Public Land Use Plans (1) 1983 Brentwood General Plan All but the southern 100 acres of the project site is within the 11,134-acre Brentwood General Plan area. The General Plan area covers all land within the City of Brentwood as well as unincorporated land outside the City that has been determined by Brentwood to bear a relation to its planning efforts. Although the vast majority of the project site is within the General Plan area, all but the northeastern 84 acres is outside the City's Sphere of Influence. The Brentwood General Plans consists of eight elements: Land Use, Circulation, Master Facilities, Dousing, Conservation and Open Space, Seismic Safety, Noise, and Safety. The first three elements were adopted in 1983, while the latter four were adapted in 1978. The Housing Element was recently updated and adopted in 1991. A comprehensive update of the General .Plan is underway and is expected to be completed in late 1992. C-4 Michael Paoli and Associates The Brentwood General Plan designates all but 80 acres of the project site for "AC" Agricultural Conservation use. The 80 acres in the northeast corner of the site are designated "PEC", Planned Employment Center, in order to provide job-generating uses adjacent to the future Delta Expressway. The intent of the PEC designation is to provide for an integrated pattern of industrial parks; business and research parks; large, individual corporate establishments; professional and administrative offices; and commercial activities, in conjunction with residential uses to provide for the housing needs of the employees in the PEC. Each PEC must designate at least 51 percent of the total land area for employment-generating uses. An evaluation of the project's consistency with the applicable land use policies of the Brentwood General Plan is presented under Impact f in this section. (2) Brentwood General Plan Update The City of Brentwood is in the process of updating its General Plan. A preliminary version of the Land Use Element was endorsed for further analysis by the City Council in December 1991 and an EIR for the plan is being prepared. The update of the plan is expected to be completed in late 1992. The plan provides for a buildout population of between 73,000 and 107,000 in the year 2020, which is substantially greater than the 50,000 buildout population ' anticipated in the existing General Plan. The preliminary land use plan map designates the project site as Special Planning Area "E". This area is described as having a maximum of 1,428 units (1,785 units with a golf course) and would include a mix of housing types, business park and neighborhood commercial uses, an elementary school, and substantial open space. The preliminary land use map designates property to the west and south of the project site (Special Planning Areas "D" and "H") for potential development at a maximum density of two units per acre. Special Planning Area "C", to the north of the project site, is designated for a maximum of 982 dwelling units (1,165 units with a golf course) and would include a mix of housing types, office and business park uses, an intermediate school, and substantial open space. An evaluation of the project's consistency with the applicable Land Use Element goals and policies of the preliminary Brentwood General Plan update is presented under Impact g in this section. (3) Contra Costa County General Plan The Contra Costa County General Plan, adopted in January 1991, includes the following elements: Land Use, Growth Management, Transportation and Circulation, Housing, Public Facilities/Services, Conservation, Open Space, Safety, and Noise. The Growth Management Element of the plan was developed Michael Paoli and Associates C-5 based upon the provisions of the 1988 Measure C approved by County voters. This measure added one-half cent to the County sales tax to fund needed transportation improvements. In order for the C6bnty or a municipality to receive street maintenance and improvement funds under Measure C, it must have adopted a Growth Management Element in its general plan. The measure established specific level of service standards for street intersections and provided that additional standards for sewer, water, storm drainage, police, fire, and parks must be included in local general plans. In 1990, another Measure C was approved by County voters which established the 65/35 Land Preservation Standard. This standard was adopted in the County General Plan and limits urban development in the County through the year 2005 to no more than 35 percent of all land in the County and requires at least 65 percent of the land to be preserved for agriculture, open space, wetlands, parks, and other non-urban uses, The County applies the 65/35 standard to all areas of the County, including.urban and non-urban uses within City boundaries. An Urban Limit Line, beyond which no urban uses can be designated, has been established by the County to facilitate the enforcement of the 65/35 Land Preservation Standard. All but the northeastern 80 acres of the project site is designated "AL Agricultural Lands, by the Contra Costa County General Plan. The purpose of the agricultural lands designation is to preserve and protect lands capable of and generally used for the production of food, fiber, and plant materials. The northeastern 80 acres of the project site is designated for "BP" Business Park uses. This designation allows a mix of commercial, office, and light industrial uses, which, by the high quality of their development and the nature of their operations, demonstrate compatibility with adjacent commercial and residential uses. An evaluation of the project's consistency with the applicable land use policies of the Contra Costa County General Plan is presented under Impact h in this section. 2 . a. Impact Change in project site land use from agricultural to urban uses and resulting population Increase If the project is developed, the use of the project site would change from agricultural to an urban, mixed-use planned community with 1,622 dwelling units, 711,000 square feet of Planned Employment Center development, 160,100 square feet of Neighborhood Commercial uses, an elementary school site, a public park site, and an 18-hole golf course. Full development of the C-6 Michael Paoli and Associates project would generate an additional population in Brentwood of 4,957. This would represent a 60 percent increase over the City's 1991 population of 8,255. The proposed change in land use and resulting increased population would have a number of impacts on local and regional resources and conditions, including agricultural resources; biological resources; traffic and transportation; air quality; noise; storm drainage and flood control; water supply, wastewater collection, treatment, and disposal; solid waste; hazardous conditions; law enforcement; fire protection and emergency services; schools; parks and recreation; energy resources; aesthetics and views; and cultural resources. These impacts are described in the subsequent sections of this EIR. Mitigation Measures Mitigation measures for project-related impacts are presented in the subsequent sections of this EIR. Level of Significance The mitigation measures can reduce many of the impacts to a level of insignificance. However, as. described in the subsequent sections, a number of the impacts cannot be effectively mitigated and, therefore, are considered unavoidable and significant. b. Impact Potential land use conflicts with surrounding agricultural uses The potential for the urban project to conflict with surrounding agricultural uses is evaluated in Section D, Agricultural Resources. Mitigation Measures See Section D. Level of Significance See Section D. c. Impact Potential land use conflicts with planned or proposed adjoining urban uses Most of the land north of the project site, across Balfour Road, is designated by the Brentwood General Plan for Agricultural Conservation use. This land is Michael Paoli and Associates C-7 encompassed by the Hancock development proposal. Just east of the Hancock project site is land designated as a Planned Employment Center, which mirrors the PEC designation on the project site south of Balfour Road. The land east of the project site, across Concord Avenue, is designated for PEC uses (northern portion) and Agricultural Conservation (southern portion). Most of this land is encompassed by the Blackhawk/Nunn development proposal, There should be no land use conflicts between the uses proposed for the project and the urban uses planned or proposed for the land to the north and east. The residential, commercial, and other land uses proposed for the project are similar to those planned or proposed for the nearby land. Moreover, the project will be separated from the land to the north by Balfour Road,which will be developed as a four-lane thoroughfare, and from the land to the east by the proposed Delta Expressway. Mitigation Measures No mitigation measures are required. Level of Significance There are no insignificant or significant impacts. d. Impact Potential land use conflicts within the project site The project appears to be master planned in a manner that will avoid potential internal land use conflicts. The project master plan places the most intensive land 'uses adjacent to the major transportation routes in the northeast portion of the site. The Planned Employment Center abuts the proposed Delta Expressway alignment and the proposed new alignment for Concord Avenue. The neighborhood commercial center is situated on the corner of the new Concord Avenue alignment and Balfour Road. The location of the commercial uses will allow convenient and appropriate access for employees and customers of the uses. The hierarchy of uses includes the high and low density cluster residential areas and the park and school sites. The cluster residential uses provide for a transitional, medium intensity use between the commercial uses and the single family residential areas and school and park sites. The cluster housing areas have access to major streets and are within walking distance of the-employment center and the neighborhood shopping center, as well as the school and park sites. The school and park sites are located between the cluster and single family residential areas, with access provided on local streets. C-g Michael Paoli and Associates The western two-thirds of the project site consists of clusters of residential Iots, ranging in size from 4,000 to 10,000 square feet, interspersed among the golf course and open space features of the project. The only points where commercial and residential uses abut and could conflict are between the neighborhood commercial and the low density cluster residential sites in the northeastern corner of the site and between the PEC area and single family lots in the southeastern portion of the site. One other area of potential conflict is between the country club parking lot and several nearby single family lots in the southeastern portion of the site. The potential for significant conflicts in these areas appears minimal, however, due to provisions of the City's zoning ordinance which require extensive landscaping, screening, and walls, and establish performance standards for all commercial uses. Further, the PD Planned Development Zone proposed for the project will require the establishment of a tailored set of development and performance standards designed to ensure land use compatibility while allowing for design flexibility. Additionally, the site landscaping plan shows landscaping between the PEC area and the single family lots in the southeast area of the site and between the country club parking lot and the adjacent single family lots. Mitigation Measures The proposed project design and landscaping plan and the provisions of the City zoning ordinance will mitigate any potential internal land use conflicts. No additional mitigation measures are required. Level of Significance The potential for internal land use conflicts is not considered significant. e. Impact Inefficient location, configuration, and access for elementary school site An elementary school site is designated for a 14-net-acre parcel in the east- central portion of the project site (see Figure B-4). The irregularly-shaped site is located on a hill with elevations ranging from less than 140 feet at the site edges to over 180 feet at the hill top near the center of the site. The location, configuration, and access for the site may pose problems for the efficient development and operation of the school. The irregular, five-sided shape of the site may pose difficulties for efficiently siting school buildings and athletic fields. Michael Paoli and Associates C-g Substantial grading will be required in order to provide level areas for building paces and athletic fields. The project grading and drainage pian indicates that the hillupon which the site is located will be leveled to accommodate the school. The hill, with a maximum elevation of over 180 feet, will be reduced to a relatively level platform with an elevation of 135-140 feet. While this may facilitate development of the school, it will result in the loss of the hill as a scenic feature of the site. Most students attending the school will come from residential development in the project. The school site, however, is not geographically central to the residential development. This will result in students having to walk longer distances to reach the school and more students having to be transported to school than would occur with a more central location. The off-center location of the school is somewhat mitigated due to residential development surrounding it on three sides, however, the area east of the site and Concord Avenue is proposed for a Planned Employment Center, which will generate no students. Direct access to the school site will be via two local streets located on the north and south sides of the campus. The locations of these streets pose several potential problems. First, in order to effectively use the streets, school loading and parking facilities will have to be developed at opposite sides of the site. This may pose supervision and safety problems, reduce the efficiency of the school design, and increase the cost of school development. Second, the street on the north side of the campus extends through the Concord Avenue area, not the Spanos site. The street would not be available to serve the school until the property owners in the Concord Avenue area decide to develop their property. It would, then, only be available if the property owners develop their property following the design shown on the project master plana Third, the street on the south edge of the site is shown extending just beyond the east boundary of the school site, and then dropping south into presumably a residential area. (The land south of the school is owned by a church and may be developed with a church instead of residential uses.) The northern one-half of the street is on the Spanos site; the southern one-half is in the Concord Avenue area. Based on the location and design of the north and south streets and the land ownership pattern in the area, the only assured access to the school would be on the south edge of the site via a half-width street developed on Spanos property. This street would dead-end near the east boundary of the site. This limited access would not be adequate on a short- or long-term basis for an elementary school. Mitigation Measures The school site shall be moved to a more appropriate location within the Spanos site. One possible location is immediately west of the present location, at the C_10 Michael Paoli and Associates northeast corner of 28 Street and 4 Drive. This would place the school at the intersection of two streets located entirely on the Spanos site, which would assure that more efficient and timely access could be provided. A site at this location could have a more regular configuration, and the extent of grading required may be reduced. Level of Significance Relocation of the school to a more appropriate location such as described above would reduce this impact to a level of insignificance. f. Impact Inconsistencies with Brentwood General Plan land use policies Table C-I lists land use policies of the Brentwood General Plan applicable to the proposed project and discusses the project's consistency with the policies. Based upon the information in Table C-1, the project is consistent with all of the applicable policies except for Residential Development Policy I under Subelement A-4, which states that: Density of residential development shall recognize natural environmental constraints, hazards, traffic and access, necessary public utilities and municipal services, and general neighborhood design. The proposed project will result in the removal and endangerment of oak trees, substantial alterations to the topography of the hills, and will place residents in close proximity to potential hazards (high-voltage power lines and underground pipelines). Mitigation Measures Mitigation measures for the loss and endangerment of oak trees, for the alteration of hill topography, and for potential hazards are discussed in Sections F, T, and N, respectively. An alternative is presented in Section V which would preclude development of the hill areas. Level of Significance The mitigation measures related to the oak trees and alteration of hill topography would not lessen the impacts to a level of insignificance. Therefore, the project's inconsistency with Residential Development Policy I under Subelement A-4 constitutes a significant unavoidable impact. The potential hazards related to the project, however, are not considered to be a significant unavoidable impact. Michael Paoli and Associates C-1 I ......................................................... ...................................................................................................... �k TABLE C-1 PROJECT CONSISTENCY WITH APPLICABLE "t BRENTWOOD GENERAL PLAIN LANA USE POLICIES Policies Consistent Discussion ,,ubr?ement A-2: Comm , ity Qroyt'h a d,D=—d ntt,_3 Balanced Community 1. Growth and development within the Yes A jobs/housing unbalance currently Brentwood Planning Area should exists in Brentwood. The General move the community toward a flan has established a goal of 0.88 balanced community, rather than a jobs per household. The ABAG bedroom community. estimate for the jobsibousing ratio ' for Brentwood in 1990 is 0.57, The proposed project, which would provide 1,45 jobs, would help ¢ Brentwood move toward its goal of becoming a balanced community. Overall Community Size 1. Within the planning boundaries 'Yes The project would add 1,622 established herein, the community dwelling units and 1,455 jobs to the should plan for an ultimate City of Brentwood, Buildout of the residential holding capacity of General .Pian area as currently approximately 15,000 housing units planned would result in the " in order to. development of about 13,000 dwelling units. The addition of the Establish the extent of local project units would result in a total economic growth needed to of 14,622 units, which approximates balance jobs with housing. the 15,000 ultimate housing unit holding.capacity. - Establish ultimate expansion levels_ for urban utilities and As previously mentioned,the project municipal services e.g., sewer, would help Brentwood move toward water, drainage, police and fire its goal of becoming a balanced protection, schools, parks, civic community. The project will center,corporation yard, etc. provide for;the necessary services and utilities through participation in a Capital Improvement Financing Program, an agreement with the Brentwood Union School District, and various other measures. + F C-12 Michael Paoli and Associates TABLE C-1 continued. PROJECT CONSISTENCY WITH APPLICABLE BRENTWOOD GENERAL PLAN LAND USE POLICIES Policies Consistent Discussion 2. It is the City's goal to gradually Yes The density of the residential increase its overall average gross development on the site ranges from residential density for urban 3 units per acre to 16 units per acre, residential development from 5.1 in with an overall density of 5.3 units 1982 to 6.0 in order to move toward per acre on the land to be designated the ultimate residential holding for residential development. capacity target within the planning boundaries and achieve increased efficiency of public utilities. Direction and Phasing of Growth I. Emphasize urban residential growth Yes The project site is located west of in a northerly and westerly direction Downtown and provides 1,456 jobs from the Downtown with defined on site. higher densities around the Downtown to help support Downtown activities, provide housing near employment and balance overall community form. 2. One large employment center should Yes The eastern portion of the project be provided for along the proposed site, adjacent to the proposed Delta Highway 4 Extension to the west of Expressway, is part of a large Downtown and additional Planned Employment Center. employment centers in strategic locations next to the railroad and major roadways in proximity to Downtown. 3. Outward expansion of development Yes The project is participating in a from the Downtown and existing Capital Improvement Financing neighborhoods should be gradual. Program in order to provide services Timing of development must and facilities in an efficient and recognize the pattern of existing timely manner. public utilities and municipal services as well as constraints in public financing. Michael Paoli and Associates C-13 TABLE C-1 continued PROJECT CONSISTENCY WITH APPLICABLE BRENTWOOD GENERAL PLAN LAND USE POLICIES Policies Consistent Discussion Ultimate Urban and City Boundaries 1. It is the goal of Brentwood to Yes Most of the project site is within the establish boundaries and to regulate City's existing General Pian area and overall community development so would be substantially separated that Brentwood shall remain from any adjacent community, physically identifiable from surrounding communities. Industrial (Development 1. As part of an economic development Yes The eastern portion of the project strategy and balanced community site, adjacent to the proposed Delta goal, Brentwood will promote and Expressway, is part of the large otherwise work toward the Planned.Employment Center west of development of three major Planned the Fairview-Balfour intersection. Employment Centers within City boundaries---one south of Downtown, another west of the Fairview-Balfour intersection, and the third just north of Downtown. 3. A larger Planned .Employment Yes The project, through the use of the - Center along.Balfour Road, west of proposed PD zone district, will Fairview Avenue, is a longer-range develop a portion of the Planned candidate for development requiring Employment Center portion of the access to markets to be provided by site in a manner consistent with the the proposed Highway 4 Extension intent of the General flan policy. before reaching full potential. Objectives for this planned center include; • Preparation of a specific plan for the full center to provide for incremental development and compatible interim and long range uses, t • Parcels up to 50 acres or more, n r C-14 Michael Paoli and Associates t 4 } . TABLE C•1 continued r PROJECT CONSISTENCY WITH APPLICABLE BRENTWOOD GENERAL PLAN LAND USE POLICIES Policies Consistent Discussion Some large office buildings; - High performance standards to protect sites from surrounding uses; and f A campus-like atmosphere. Commercial Development 3. New local convenience shopping Yes The neighborhood shopping center centers should be located at the proposed within the project site is to intersections of major streets or be located at the intersection of two highways,where appropriate. thoroughfares; Balfour Road and Concord Avenue. ub�l .rnent A-4: Rg idential and Neigh rbood Development Neighborhood Organization 1. Sj ze-: A neighborhood should Yes The project buildout population normally accommodate from 1,000 would be approximately 5,000, to 3,000 residents. which would approximate the size of two neighborhoods. 2. Atm.: The area of the neighborhood Yes The project site, at 751 acres,has the should be adequate to provide for area of about two neighborhoods the required housing at planned and includes considerably more densities, plus land for school, open space (over 300 acres) than neighborhood shopping and service would be found in most facilities, and open space. Normally neighborhoods. The project also a neighborhood should comprise includes land for a school, park, golf from 200 to 400 acres. course, neighborhood shopping center, and employment-generating uses. :'vbchael Paoli and Associates C-15 TABLE C-1 continued PROJECT CONSISTENCY WITH APPLICABLE BRENTWOOD GENERAL PLAN LAND USE POLICIES Policies Consistent Discussion 3. Bounda : Neighborhood Yes The boundariesofthe project site boundaries may be formed by consist of major trafficways— topographic features such as a Balfour Road-on the north and the drainageway or canal, major proposed Delta Expressway on the trafficways, or planned sections of east—and open space on the west the open space network. Boundaries and south. shall be laid-out so as to encompass a,reasonably compact area capable The project is not reasonably of accommodating the necessary compact due to the extensive neighborhood components in an amount of open space within it, but efficient, harmonious relationship to does accommodate neighborhood each other. components in an efficient, harmonious manner. 4. Nei borhoo Structure: Each Yes The project is comprised of a neighborhood should be composed number of distinct subunits of of subunits of 200 to 300 dwellings, various densities, separated by golf characterized by integrated planning, course and open space features. a reasonable variety of dwelling units, and set off from one mother by landscaping and trees. Through the principle of cluster planning, the net density of the housing subunits can be somewhat increased with the balance of the land area going into open space. 5. Neighborhood Circulation:lation: Neigh- Yes The project site is bounded and not borhoods should be bounded and not penetrated by major traffic routes: penetrated by major traffic routes. Balfour Road, Concord Avenue, and Street systems within neighborhoods the proposed Delta Expressway. shall be designed to provide The internal street system has been convenient, safe vehicular access to master planned to provide dwellings while at the same time convenient access to all units, minimizing auto travel in the Project land uses and the circulation neighborhood. Pedestrian and system have been planned to bicycle path systems should link all minimize motor vehicle trips and to parts of the neighborhood and promote bicycle and pedestrian provide safe and pleasant access travel. Because of the large size of from dwellings to neighborhood. the site and the amount of open schools, parks, shopping and space provided, some of the units in services. As a general rule, no the hill areas are further than three- person should have to walk more quarters of a mile from the school than three-fourths of a mile to reach site, the park site, and the the school, park, or neighborhood neighborhood shopping center. shopping center. C-16 Michael Paoli and Associates -. i Y �. TABLE C-1 continued PROJECT CONSISTENCY WITH APPLICABLE BRENTWOOD GENERAL PLAN LAND USE POLICIES s Policies Consistent Discussion 6. NeighbQrbQod_ Services: Each Yes The proposed project includes an neighborhood shall provide a clementary school site, a park site, neighborhood elementary school, - --and a neighborhood shopping center park, and playground. Park, play- site. The higher density housing on ground, and school may be the site is located immediately integrated into a combined unit, or adjacent to the park site. There is may be provided separately, land in the southeast portion of the depending on neighborhood needs site awned by a church which may and design. Smaller open spaces be developed as a church facility. including tot lots shall be provided The land appears to be appropriately in at least some of the housing located for a church facility in subunits with particular'attendon to relation to other planned uses and is the needs of medium and high on the proposed new alignment of density areas. Shopping facilities Concord Avenue, which would shall be provided in a location provide appropriate traffic access. proximate to each neighborhood or a shopping center for two or more neighborhoods may be provided at a convenient central location at the intersection of the neighborhood borders. Provision of land for churches and other social organizations shall be made in accordance with overall needs. Although there is not expected to be a church in every neighborhood, whenever a church or ether social organization facility is included in a neighborhood, it shall be located in such a way as to minimize disturbance from out-of-neighbor- hood traffic and shall occupy a site sufficiently large to provide off- street parking for the facility, and buffering from adjacent residences. Michael Paoli and Associates C-l? TABLE C-1 continued PROJECT CONSISTENCY WITH APPLICABLE BRENTWOOD GENERA PLA1V LAND USE POLICIES Policies Consistent Discussion 7. Hcs : Each neighborhood Yes The project provides for a wine should include a variety of housing variety of housing types. Single types consistent with the basic family lots range in size from 4,000 harmony of subarea design. square feet to 10,0000 square feet. A Attention shall be given to the substantial number of low and high integration of subarea design themes density cluster housing units will to the end that each total also be provided. neighborhood shall provide a wide choice of dwelling types, sizes, and It is not known if the project will costs. Provision of moderate income provide moderate-income housing housing (consistent with the consistent with the Housing Brentwood Housing Element) shall Element. be a requirement of each neighborhood. Residential Development 1. Density of residential development No The proposed project will result in shall recognize natural the removal and endangerment of environmental constraints, hazards, oak trees, substantial alterations to traffic and access, necessary public the topography of the hills,.and will utilities and.municipal services, and place residents in close proximity to general neighborhood design. potential hazards (high-voltage power lines and underground pipelines). s ; t y C-18 Michael Paoli and Associates t„ g . Impact Inconsistency with preliminary Brentwood General Plan update land use element goals and policies The preliminary Land Use Element goals and objectives of the General.Plan update are included in Appendix C-1. The project appears to be consistent with all applicable goals and objectives except for a possible inconsistency with Objective 5.3: Residential development shall respond to the environmental setting, maintain open space and preserve the existing natural resources. Due to the loss and potential endangerment of oak trees on the project site and the substantial development and grading of the hilltop areas, both of which cannot be mitigated to.a level of insignificance, the project may not be consistent with Objective 5.3 (reer to .Impact f in this section and Sections F and T of this EIR). Mitigation Measures Mitigation measures for the loss and endangerment of oak trees and for the alteration of hill topography are discussed in Sections F and T, respectively. An alternative is presented in Section V which would preclude development of the hill areas. Level of Significance Since the Brentwood General Plan update is preliminary and unadopted, inconsistency with a preliminary Land Use Element policy does not constitute a significant impact. h. Impact Inconsistencies with Contra Costa County General Plan land use policies Table C-2 lists land use policies of the Contra Costa County General Plan and discusses the project's consistency with the policies. Based upon the information presented in Table C-2, the project is consistent with most of the applicable policies; however, it is inconsistent with policies related to infilling of already developed areas, preserving and buffering of agricultural land and open space, hillsides, and ridgelines, and protecting prime agricultural land. Michael Paoli and Associates C_19 . r TABLE C-2 .PROJECT CONSISTENCY WITH APP,LYCABLE CONTRA COSTA COUNTY GENERAL PLAN LAND USE POLICIES Policies Consistent DIscussion Jobs/Housing Balance 3-2. Job infill shall be supported and Yes The jobs/housing ratio in Brentwood stimulated where the jobs/housing is 0.47. The proposed project would ratio shows an overabundance of provide 1,456 jobs, which would housing to jobs. contribute to improvement of the overall jobs/housing imbalance in Brentwood. 3-3. As feasible, areas experiencing rapid Yes Brentwood, is experiencing rapid urban growth shall be developed so urban growth. The proposed as to.provide a balance of new project, with a jobs/housing ratio of residential and employment 0.90, will provide a balance of opportunities. residential and employment opportunities. Growth Management,65/35 Land Plan, and Urban Limit Line 3-6. Development of all urban uses shall Yes The project is participating in a be coordinated with provision of Capital Improvement Financing essential community services or Program and must pay various facilities including, but not limited development fees which will provide to, roads, law enforcement and fire for infrastructure improvements and protection services, schools, paries, services. sanitary facilities, water and flood control. 3-7 The location, timing and extent of Yes (See 3-6 Discussion above) growth shall be guided through capital improvements programming and financing (i.e., a capital improvement program, assessment districts, impact fees, and developer contributions) to prevent infrastructure, facility and service deficiencies. C-20 Michael Paoli and Associates TABLE C-2 continued PROJECT CONSISTENCY WITH APPLICABLE CONTRA COSTA COUNTY GENERAL PLAN LAND USE POLICIES Policies Consistent Discussion 3-8. Infilling of already developed areas No The project does not represent shall be encouraged. Proposals that infilling of already developed areas would prematurely extend nor is it contiguous to existing urban development into areas lacking development. requisite services, facilities and infrastructure shall be'opposed In The project, however, in terms of accommodating new development, infrastructure, would not be able to preference shall generally be given develop prematurely because City to vacant or under-used sites within capital improvement financing and urbanized areas, which have various development fee programs necessary utilities installed with are in place to assure that necessary available remaining capacity, before infrastructure will be in place undeveloped suburban' lands are concurrent with development. utilized. 3-9. Areas not suitable for urban Yes The project site will remain in its development because of the lack of present use until the needed availability of public facilities shall infrastructure is provided pursuant to remain in their present use until the the capital improvement r and needed infrastructure is or can be development fee programs. assured of being provided. 3-11. Urban uses shall be expanded only Yes The project will be within an Urban within an Urban Limit Line where Limit Line, and conflicts between conflicts with the agricultural the project and agricultural uses are economy will be minimal. expected to be minimal (see Section D). 3-12. Preservation and buffering of No Development of the project will agricultural land should be result in the loss• of 751 acres of encouraged as it is critical to agricultural open space land and the maintaining a healthy and wildlife habitat and scenery afforded competitive agricultural economy by this land. Only 58 acres of the and assuring a balance of land uses. site is considered prime farmland. Preservation and conservation of open space, wetlands, parks, The scenery provided by the trills on hillsides and ridgelines should be the site will be substantially altered encouraged as it is crucial to by planned grading of ridgelines and preserve the continued availability hillsides and the development of of unique habitats for wildlife and dwellings on the ridgelines and plants, to protect unique scenery and hillsides. provide a wide range of recreational opportunities for County residents. Nfichael Paoli and Associates C-21 TABLE Cot continued PROJECT CONSISTENCY WITH APPLICABLE CONTRA COSTA COUNTY GENERAL PLAN LAND USE POLICIES Policies Consistent Discussion 3-14. Protect prune productive agricultural No As described under 3-12 above, the land from inappropriate 58 acres of orchards are prune subdivisions. farmland. In general, however, the land in the western portion of the Brentwood planning area is of lesser quality for agricultural use than land in the southern and eastern areas. This is a major factor in encouraging growth in this direction rather than within the County's agricultural core to the south and east of Brentwood. 4 C-22 Michael Paoli and Associates Mitigation Measures No mitigation measures are available for the project's inconsistencies with the specified policies. Level of Significance Because development of the project is contingent upon annexation to the City of Brentwood, the County's policies are relevant for information purposes and do not constitute a significant impact. i. Impact Inconsistencies with Contra Costa County's 1988 Measure C and 1990 Measure C In order for Brentwood to-receive street maintenance and improvement funds under the 1988 Measure C, it must have a growth management element in its general plan. The City's current general plan does not have this element, but one will be incorporated in the updated general plan scheduled for adoption in 1992. Although the City does not have a formal growth management element at this time, it does have various development fees and capital improvement financing programs to insure the provision of adequate infrastructure and facilities for new development, including the proposed project. The proposed project site is within the Urban Limit Line established by Contra Costa County as a result of the 1990 Measure C. Mitigation Measures To achieve full compliance with the 1988 Measure C, the City will incorporate a growth management element in its updated General Plan. Level of Significance The above mitigation measure will eliminate any inconsistencies with the 1988 Measure C. j. Impact Inconsistencies with Government Cade Section 56377 policies and priorities related to open space land Michael Paoli and Associates C-23 In considering the proposed annexation of the project site to the City of Brentwood, the Contra Costa County Local Agency Formation Commission must address the following provisions of Government Code Section 56377: In reviewing and approving or disapproving proposals which could reasonably be expected to induce, facilitate, or lead to the conversion of existing open-space lands to uses other than open- space uses, the [local agency formation] commission shall consider all of the following policies and priorities: (a) Development or use of land for other than open-space uses shall be guided away from existing prune agricultural lands in open-space use toward areas containing nonprime agricultural lands, unless that action would not promote the planned, orderly, efficient development of an area. (b) Development of existing vacant or nonprime agricultural lands for urban uses within the existing jurisdiction of a local agency or within the sphere of influence of a local agency should be encouraged before any proposal is approved which would allow for or lead to the development of existing open-space lands for non- open-space uses which are outside of the existing jurisdiction of the local agency or outside of the existing sphere of influence of the local agency. The proposed annexation of the project site appears to be consistent with Section 56377(a). The Brentwood General Plan encourages growth to occur in a northern and western direction from the downtown area in order to avoid encroaching into the prime agricultural area to the south and east of the City. The area to the south and east is shown as the County's "Agricultural Core" in the Contra Costa County General Plan. Although the project site contains a small amount of Prime Farmland, it is located west of downtown, in an area where most of the land is not classified as Prime Farmland and is mainly used for grazing. On its face, the proposed project appears to be inconsistent with Section 56377(b). Approval of the project would lead to the development of existing open space land for non-open space uses which is outside Brentwood's existing City limits and, for the most part, outside the City's Sphere of Influence. .Due to its fringe-area location, the project does not support the policy of encouraging development of land already within the City and its Sphere of Influence. However, it should be noted that the City requires all projects of this nature to participate in a Capital Improvements Financing Program (CIFP). These programs effectively provide for a phasing of development as necessary services are financed and able to be provided. This project is within CIFP 91-1, which is the third CIFP to be established. The projects within the first and C-24 Michael Paoli and Associates second CIFPs are within the City limits and will likely be constructed prior to those projects in the third CIFP. The CIFP requirement effectively encourages land within the existing City limits and Sphere of Influence to develop prior to land outside the existing City limits and Sphere of Influence. Mitigation Measures No mitigation measures are required. Level of Significance This impact is not potentially significant. k. Impact Inconsistencies with ABAC Regional Plan 1984 policies related to expansion of a jurisdiction's sphere of influence The policies listed by ABAG staff as being applicable to expansion of a jurisdiction's sphere of influence are Policies A.I. and A.$. in the Regional Strategies section of ABAG's Regional Plan 1980. A.I. The Bay Area and its communities should be organized in a City-Centered Region. A.$. Controlled development areas should be located around the urban fringe of each community to provide, if needed, holding zones to permit the orderly extension of urbanization. Land scheduled for early use should be released in units of neighborhood size or larger, and unified planning and design concepts should be applied in order to prevent wasteful, unattractive, and ecologically damaging scattered development. The proposed project site appears to be consistent with Policy A.I. The project is proposed to be developed as part of the City of Brentwood and not as an isolated, unincorporated area. The project appears to be consistent with the first part of Policy A.$, regarding the creation of holding zones to permit the orderly extension of urban development. The reasons for this conclusion are the same as described for Government Code Section 56377(b) in Impact i and are based upon the City's CIFP requirements. The project site has been master planned and would be developed as an integrated unit under a unified planning and design concept. This will avoid wasteful, Michael Paoli and Associates C-25 ............................... unattractive, scattered development and should minimize, to the extent possible, ecological damage. Mitigation Measures { t No mitigation measures are required. Level of Significance This impact is not potentially significant. I. Impact Approval of the project will 'freeze' the land use ordinances, policies, and standards applicable to the project N The project contemplates both a development agreement under Government Code Sections-65864 et seq. and a vesting tentative subdivision map under Government Code Sections 66498.1 through 66498.9. The development agreement would grant the Applicant the right to proceed with development of the project in accordance with the ordinances, policies, and standards in effect at the time of its execution. In return, the City can impose conditions of approval on the project beyond those normally permitted by law. , The vesting tentative map will similarly give the Applicant the.right to proceed under those ordinances, policies, and standards in effect when the map ` application is deemed complete. The City necessarily loses some ability to subsequently modify a project when it ' grants a property owner vested' rights. however, the City has required a development agreement for this and other new development projects in order to impose fees to finance the City's Capital Improvement Financing Program. The project will be governed by the City's new General Plan, once adopted, which ° will 'contain the City's long=term planning and, growth policies, minimizing the practical effects of granting the Applicant vested rights. Mitigation Measures No mitigation measures are required. Level of Significance y This impact is not considered to be potentially significant. : C-26 Michael Paoli and Associates , 3. QUMULAIIVE IMPACTS AND MITIOATION MEASURES a. Impact Cumulative change of 9,800 acres from primarily agricultural uses to urban uses Buildout of the General Pian area in accordance with the cumulative development scenario would result in a change in-land use of about 9,800 acres used primarily for agricultural purposes to urban uses. This change would result in the development of an additional 13,664 dwelling units and a population increase of 41,757. The cumulative change in land use and resulting increased population would impact local and regional resources and conditions, including agricultural resources; biological resources; traffic and transportation; air quality; noise; storm drainage and flood control; water supply; wastewater collection, treatment, and disposal; solid waste; hazardous conditions; law enforcement; fire protection and emergency services; schools; parks and recreation; energy resources, aesthetics and views; and cultural resources. The potential impacts are described in the subsequent sections of this BIR. Mitigation Measures Mitigation measures for the cumulative impacts are set forth in the subsequent sections of this EIR. Level of Significance The mitigation measures can reduce a number of the cumulative impacts to a level of insignificance. However, as described in the subsequent sections, some of the impacts cannot be effectively mitigated and, therefore, are considered unavoidable and significant. Michael Paoli and Associates C-27 SECTION D AGRICULTURAL RESOURCES SETTING, IMPACTS, AND MITIGATION MEASURES I . SEJJT�J a. Current Agricultural Nand Use The project site is currently used as rangeland for grazing cattle, with the exception of 58 acres in the northeast portion of the site that are planted in walnuts. The surrounding land is also agricultural in character. The predominant activity is grazing, with open range to the south, west, and north.. Properties to the east and northeast are planted in orchards and row crops (see Figure C-l in the Land Use.section). b. Soils There are six main soil types within the project area, and four other soil types are also represented in lesser quantities (see Figure D-1). The characteristics of the major soil types as described in the U.S.D.A. Soil Conservation Service, Suit Survey of Centra Costa Courtly, 1977 are listed here: BdE: Briones loamy sand, 5 to 30 percent slopes, U.S. Capability Class V1e-l. Included in this soil unit are small areas of Caviota and San Ysidro foams. This sail is appropriate for range use and homesites. AcF: Altamont-Fontana complex, 30-50 percent slopes, U.S. Capability Class Vle-1. Approximately 15 percent of this complex is composed of foams and clays from the Millsholm, Lode, Capay, and Rincon series. This sail is used mainly for rangeland. RbA: Rincon clay loam, 0 to 2 percent slopes, U.S. Capability Class IIs-3. Included in this soil unit are small areas of Brentwood clay loam, Capay clay, and San Ysidro loam. This soil can be used for irrigated crops. Pb: Pescadero clay loam, U.S. Capability Class lVw-6. Small areas of Clear Lake clay are included in this soil series. This soil is used for pasture and hornesites: CaA: Capay clay, 0 to 2 percent slopes, U.S. Capability Class IIs-5. Included in this soil unit are small areas of Rincon and Michael Paoli and Associates D-i AbD CaA rCaA KaC RbA ■ CaA ■ BdE AbD ■ Pb b A ■ AcF ■ BdE AcF Pb AbE KaE ■ KaC wBdE BdF BdE: Briones loamy sand, 5 to 30 percent slopes AcF: Altamont-Fontana complex, 30-50 percent slopes RbA: Rincon clay loam, 0 to 2 percent slopes Pb: Pescadero clay loam Cak Capay clay, 0 to 2 percent slopes AbD: Altamont clay, 9 to 15 percent slopes AbE: Altamont clay, 15 to 30 percent slopes KaC: Kimball gravelly clay loam, 2 to 9 percent slopes Source: , oil Survey of. KaE: Kimball gravelly clay loam, 9 to 30 percent slopes Conn Cosla County, 1977. BdF: Briones loamy sand, 30 to 50 percent slopes Michael Paoli and TYPES OF SOIL ON PROJECT SITE, FIGURE D-1 Associates ........................... Brentwood clay loam and Marcuse clay. This soil is suitable. for some agricultural crops. AbD: Altamont clay, 9 to 15 percent slopes, U.S. Capability Class VIIe-l. 'This soil unit includes small drainageway areas composed of Capay and Rincon soils. Fontana and Linne sails are also represented. This soil is suitable for range and some grain crops. The U.S.D.A. Soil Conservation Service Sail Candidate Listing for Contra Costa County lists soils that have the potential to qualify as Prime Farmland and Farmland of Statewide Importance. Prime Farmland is land which has the best combination of physical and chemical characteristics for the production of crops. Farmland 'of Statewide Importance describes land other than Prime Farmland which has a good combination of physical and chemical characteristics for the production of crops, For land to offici'ally be classified as Prime Far land or Farmland of Statewide Importance, it must have been used for the production of irrigated crops within the last three years (California Department of Conservation, 1988). Capay, clay and Rincon clay loam are listed in the Steil Candidate .fisting for Contra Costa County as potentially qualifying as Prime Farmland. The northern approximately 180 acres of the site consists of these soils. The 58-acre walnut orchard within this area, since it is irrigated cropland, qualifies as Prime Farmland. The remainder of the land is used for grazing. Altamont Clay, which underlies the proposed school site, is listed as potentially qualifying as Farmland of Statewide importance. This land is not irrigated cropland. Figure'' D-2 shows the Prime Farmland and Farmland of Statewide Importance within the Brentwood Planning Area.. C. Williamson Act Contract Lands The Spanos site is currently held in a Williamson Act contract (see Figure D-3). Land directly south of the project area is also held in a contract which is due to expire in February 1996. A large parcel northwest of the project area is held in a contract for which no notice of non-renewal has been filed. A small parcel east of the project site, but not contiguous with its borders, is also held in a contract. The contract for another small parcel east of the project site expired in February 1991. A Notice of Non-Renewal of the contract holding the Spanos site has been filed with. the City of Brentwood, and the contract is due to expire in February 1999. Should earlier cancellation of the contract become necessary, the law allows for such cancellation, subject to the City of Brentwood masking the findings specified Michael Paoli and Associates D-3 P a#w jt tfi r t iS }4:;.t 'f +'�J ti/t', I f J `\ � t t \ \ - \.-.. } 1y�', 4r:/� ./1 t iJ.` 1 t',�' J,`, �J ,if./,J`/•/ W. \•,: r;. :�/i \/` \ / +C/ �'l•,ti /�•yr,\,'-,r.\ tit /S„„ �•;lr . V. ' N. / � , 1, ; , /. f / :' / Brent L r'. �:� '', ' \-'r{.-, Balfour Rd. .� s ronX� lam " /• y ./ y• i ! >3 MA I Project Area + L U Planning Area Boundary ' } V. Lamv `'�.,•3.X r � Prime Farmland Grazing Land "t" l Farmland of Urban and � Statewide Importance Built-up Land 07 uSQA�� F7Unique Farmland 71 Other Land . Farmland of 0 2 miles L Local Importance —7 Source: Dept. of Conservation Base Map 6/90 Michael Paoli PRIME FARMLAND IN and FIGURE D-2 Associates THE BRENTWOOD AREA ............................... Ste"` ,."ep o + � � � i SpJ��!• 'y y W ,...� � �Li � _ yrs, : � i; x t*'* !� w ��K?"� �''•: •,� ,�,� � c. int ';t:,,t,...�:" .. �_° . � LLI LL CL CL LO co " F'J""r"" �..w.',. "tea.,,R .,_ •:fi'�;;:•: .,.� uj 'p f N •cn 1 ' l \ JR f�'{4•X4 PX4Jb cn yo �', { w 4 a J cy f .' — CL in Subsection 2 and providing that a penalty of 12=J2 percent of the property's fair market value is assessed. 2 . WIL LIAMSQN ACT CONTRAS- rA�'Y ITON FINDINGS DIS!MSSION 2. General In order to allow cancellation of the Williamson Act contract, the City of Brentwood must find either that the cancellation is in the public interest or that it is consistent with the intent of the Williamson Act. The specific findings that must be made pursuant to Section 51282 of the Government Code are listed below, along with a discussion of each relative to the project. b. Public Interest Findings In order for the City of Brentwood to find that cancellation of the contract is in the public interest, it must find that: Finding a: Other public concerns, such as the need for housing, outweigh the objectives of the Williamson Act. Discussion of a: Projections developed by ABAG indicate that the population within Brentwood's Sphere of Influence will increase from 9,300 in 1990 to 28,400 in 2005 (ABAG, 1989). Full development of the General Plan area, excluding the proposed project and other projects not currently designated for urban development, would result in a population of approximately 39,000. Based upon these numbers, the need for housing in the Brentwood area could be accommodated without the proposed project for the foreseeable future. The City of Brentwood is in the process of updating its General Plan. The updated General Plan is intended to provide for growth within the Brentwood Planning area to the year 2020 and a buildout population of between 73,000 and 107,000. Finding b: There are no proximate, non-contracted lands which are both available and suitable for the use proposed for the contracted land, or development of the contracted land would provide more contiguous patterns of urban development than development of proximate non-contracted land. D-6 Michael Paoli and Associates 1 Discussion of b: There are at least 801 acres of proximate, non-contracted land east and north of the project site that could accommodate the uses proposed for the project. This land is the subject of two separate development proposals and is not available for use by the project proponent. The non-contracted land to the west of the site could } potentially accommodate the uses proposed; however, this land is outside the City's existing planning area and Sphere of Influence and development of this land would represent a discontiguous pattern of urban development. c, Williamson Act Consistency Findings In order for the City of Brentwood to find that cancellation of the contract is consistent with the purposes-of the Act, it must find that: Finding a: The cancellation is for land on which a notice of non-renewal has been served pursuant to California Government Code Section 51245. Discussion of a: A Notice of Non-renewal has been served for the subject property in November 1989 pursuant to California Government Code Section 51245. Finding b: Cancellation is not likely to result in the removal of adjacent lands from agricultural use. Discussion of b: The potential of the project to induce urban development on adjacent agricultural land does not appear to be substantial. The land being cultivated for crops east of the site is within the current City limits, is designated for urban development by the General Plan, and is the subject of a pending development proposal. This area could develop prior to the project site. The land to the north of the project site is also the subject of a pending development proposal. Rangeland to the west and south of the site is being considered for urban development as part of the City's General Michael Paoli and Associates D-7 uYR, Plan update. Development of the project site could enhance the potential for urbanization of properties to the south and west by making these properties contiguous to development. The potential for urbanization of the properties to the west and south would appear to be more dependent upon policy decisions to be made as part of the pending General Plan update than upon the development of the project site: Finding c: Cancellation is for an alternative use which is consistent with the applicable provisions of the City or County General Pian. Discussion of c: The City and County General Plans designate most of the project site for agricultural use. The project site proposes an amendment to the Brentwood General Plan to allow for urban development and is under consideration for urban development as part of the City's General Plan update. Finding d: Cancellation will not result in discontiguous patterns of urban development. Discussion of d: The project site is discontiguous from existing urban development. All of the land along Balfour Road between the existing developed portion of the City and the project site, however, is designated for urban development and most of this land is the subject of pending development proposals. Therefore, removal of the contract may not result in a discontiguous pattern of urban development. Finding e: There is no proximate non-contracted land which is both available and suitable for the use proposed for the contracted land, or, that. development of the contracted land would provide more contiguous patterns of urban development than development of.proximate non_ contracted land. Discussion of e: Refer to Discussion of Finding b, Subsection 2, b. , b D-8 Michael Paoli and Associates f 3. PROJECT IMPACTS AND MITIGATIDN MEASURES ` a. Impact Conversion of 693 acres of grazing land and 58 acres of prime farmland to urban and open space uses Development of the project will result in the conversion of 693 acres of grazing land and 58 acres of cropland currently being cultivated for walnuts to urban and open space uses. The walnut orchard is designated Prime Farmland. This is a significant impact. Mitigation Measures No mitigation measures are available. Level of Significance This is a significant-unavoidable impact. b. Impact .Loss of agricultural crops:. walnuts and rangeland for livestock Information provided by the Contra Costa County Department of Agriculture in its 1990 Agricultural .Report provides'a basis for estimating impacts related to the loss of crops and rangeland within the project area. Within Contra Costa County, 1,680 acres of land were cultivated for walnuts in 1990. The loss of the 58 acres on the project site, therefore, would represent a loss of 3.5 percent of the total acreage cultivated for walnuts. By 1990 standards, this represents a lass of 39 tons of walnuts whose value at $944 per ton would equal $36,684. The 'conversion of 593 acres of grazing, 'land on the project site to urban and opera space uses represents a loss of 0.39 percent of the 179,000 acres of rangeland in use in Contra Costa County in 1990. This represents a value of about $14,497, out of the estimated 1990 total gross value of $3,745,000 resulting from rangeland operations within the County in 1990. Information from a report on the Economic Impact of Agricultural Production in Stanislaus County (Sarquis, 1981) can be used to develop an estimate of the total economic value of the production and processing of the agricultural products from the site. The report indicates that the weighted avenge economic multiplier for walnuts is 3.2. Multiplying the total value of the walnuts grown on site, $36,684, by 3.2, results in an economic impact of $117,389. The weighted average multiplier for livestock was listed as 1.8, resulting in an M'chael Paoli and Associates D-9 economic impact of $26,095 for the grazing land. The total economic impact, or loss, for all agricultural products resulting from the.conversion of the project site to urban uses, therefore, would be $143,484. Mitigation Measures No mitigation measures are available. Level of Significance This is a significant unavoidable impact. c. Impact Potential conflicts between urban uses on the project site and adjacent agricultural uses The conversion .of the project site to urban and open space uses could have impacts on surrounding agricultural land related to pesticide use; dust; trespassing, vandalism, and litter; and noise and light. As described below, the potential for these impacts is not significant, primarily because most of the surrounding land is used for grazing, a relatively non-intensive agricultural use. The only intensively farmed land is located east and northeast of the site. This - Mand is planned for urban development, and an application for its development is currently being processed by the City of Brentwood. The existence of a residential project could lead to restrictions on the application of agricultural.pesticides on adjacent farmlands. The term "pesticide" is a general classification that includes fungicides, herbicides, insecticides, and rodenticides. The amended Federal Insecticide, Fungicide and Rodenticide Act of 1972 regulates the formation, registration, labeling, distribution, and use of pesticides in the United States. Pesticides must be labeled according to toxicity Category I, II, III or IV. Category I is the most toxic and Category IV is the . least toxic. Pesticides must also be classified for either general or restricted use. General use classification is allowed when the pesticide will not cause unreasonable adverse effects on the environment. Restricted use classification is required if the pesticide may cause undesirable effects without additional regulatory restrictions. Before restricted pesticides can be used, the applicator is required to obtain a "Restricted Materials Permit" from the Contra Costa County Department of Agriculture. Prior to issuance of a permit, factors such as temperature, wind speed and direction, time of year, and adjacent land uses are considered. The Department of Agriculture requires that pesticides utilized on farmland adjacent to any residential development be applied in such a manner as to confine the substance to the target area. only. Citations for violating this regulation are D-10 Michael Paoli and Associates issued by the Commissioner's office. The most efficient method for Keeping pesticides away from residential developments is caYefully directed spraying that only makes contact with the plant material and does not become windborne. All pesticides, both restricted and unrestricted, are controlled by the Commissioner's office through operator identification numbers and special permits (Stout, 1992). It should also be noted that under the requirements of Section 25249.6 of the Safe Drinking Water and Toxic Enforcement Act of 1986 (Proposition 65), no one can be exposed to a chemical listed in the act without an adequate warning. The liability, or potential, for having to comply with this requirement already exists in the vicinity of the project site as. well as in every other area in California where agricultural and urban uses are in proximity to each other. Restricted pesticides are normally not applied to grazing lands. Pesticides that could be applied to grazing lands include non-restricted herbicides utilized to control weeds, and restricted pesticides such as 2-4-D and grain bait (placed underground and used for rodent control), including Aluminum Phosphide, Zinc Phosphide, and strychnine (Edwards, 1991). Restricted pesticides may be applied to the cropland east and northeast of the project site and Concord Avenue. As previously noted, this land is planned for , urban development and is the subject of pending development applications. Dust from adjacent agricultural activities could create nuisance conditions which lead to complaints from residents. Dust may be generated by a number of agricultural operations, such as discing, plowing, and harvesting. Since most of the land adjacent to the project site is rangeland, and is not normally disced, plowed, or harvested, dust isnot anticipated to be a substantial problem. The potential would exist for residents to trespass, litter, or vandalize nearby agricultural lands. This is a common problem on agricultural lands that are in close proximity to residential subdivisions and results in an economic loss to the farmer. The development is separated from agricultural lands to the east by the existing Concord Avenue, along whose right-of-way the proposed Delta Expressway would be built. As noted previously, this land is within the current City limits and is designated for urban development. Agricultural land to the south, west, and north is open rangeland. Balfour Avenue, designated as a thoroughfare in the General Plan, would separate the property from rangeland to the north. Substantial open space buffer areas are provided along the southern and western boundaries of the site. Therefore, the potential for such nuisances to occur is limited. Agricultural operations can be a source of noise and headlight glare from the operation of tractors and other equipment which may be regarded as an annoyance or distraction by residents of a residential subdivision. Since there is Michael Paoli and Associates D-11 no intensive agriculture adjacent to the planned residential areas of the project site, the potential for noise and glare impacts appears to the minimal. Mitigation Measure All home buyers within the project shall be provided with a "Notice of Agricultural Use" that identifies the possible conflicts between residential and agricultural uses in accordance with City policy. Levet of Significance This impact is not considered to be significant. 4 . C11MUL.ATIVE __IMPACTS AND_MITIGATION _M ASURES a. Impact Cumulative conversion of agricultural land to urban uses Full development of the Brentwood General Plan and the projects considered in the cumulative analysis would result in the development of about 3,800 acres, a substantial portion of which is used for agricultural purposes and designated as Prime Farmland on the Contra Costa County Important Farmland Series Map (Department of Conservation, 1990). - This is considered to be a significant unavoidable adverse impact. Mitigation Measures No mitigation measures are available. Level of Significance This impact is considered to be significant and unavoidable. t , t S D-12 Michael Paoli and Associates 1 SECTION E TOPOGRAPHY, GEOLOGY, SOILS, ANIS SEISMIC HAZARD SETT'I'NG, IMPACTS, AND MITIGATION MEASURES 1 . SE11INQ An initial geologic and soil reconnaissance study was prepared by ENGEO, Inc. for the Applicant in November 1989. Additional studies of the coal mine area, groundwater, liquefaction, and seismic conditions on the Spanos site followed in 1990 and 1991. This section is based on the information, conclusions, and recommendations presented in ENGEO's studies. a. Topography A topographical and aerial view of the site is presented in Figure F-1. The northern portion of the site is characterized by a gently eastward sloping alluvial plain. The central and southern portions of the project site contain ridges with intervening valleys. .Because the geologic structure of Mt. Diablo tends to control the alignment of geologic structures -to the east and northeast of the mountain, including the project site, these ridges and valleys trend northwest and west. Three primary drainage courses lie on the project site: Deer Creek to the north, Dry Creek near the southern property line, and an unnamed tributary drainage course to Dry Creek>,in the central property area. Elevations at the site range from about 125 feet: above mean sea level at the northeast property corner to 375 feet near the southwestern corner of the project site. The highest of the intervening hills on the property rises to approximately 360 feet above mean sea level. b. Geology The bedrock that forms the foundation of the project site has been uplifted by the eastern flank of Mt. Diablo, The bedrock trends to the northwest and is gently dipping to the northeast. Mt. Diablo also affects the trend of fold axis and faults, which is generally northwest-southeast. The northern portion of the property,;characterized by a gently eastward sloping alluvial plain, is underlain by gravel, sand, silt, and clay mantling the bedrock. The hilly central and southern areas are underlain by Tertiary-aged bedrock, including the Domengine sandstone, the Nortonville shale, the Markley ,y2ichael Paoli and Associates _t �^ti i f ! t i t. f 4 t .,ala A 4 � t _ i4,'tp'� ' r.�, `+1 SrR y4.9• g Mq gp P,a s •Fye,.. . ' # «N�" .?d T+ c �w .�11" f��►�,tg,.� j ,Yy... . k 3 rhY�. tit• � n v�;`wi o <... ,a< �'° Ah'4t uN k f fi! �Y R«.^", r%« ,.,,�s ` �i 1�0 � } �! � �ta u' 7�'taset°°' t• t r SECTION V ALTERNATIVES TO THE PROPOSED PROJECT 1 . GENERAL a. Introduction This section addresses five alternatives to the proposed project. Information that is presented for the alternatives includes their location, design, and population characteristics and responses to the following issues from Section 15126 of the State CEQA Guidelines: • Could the alternative feasibly attain the basic objectives of the proposed project? • Is the'.' alternative capable of eliminating the significant adverse environmental effects of the project or of reducing them to a level of insignificance? • Is the alternative environmentally superior to the proposed project? b. Summary of Alternatives Considered The five alternatives considered are summarized below: • Ng Project. The project site would continue to be used for agricultural purposes (grazing land and orchards). • Existing General Plan: The site would be developed in accordance with the existing Brentwood General Plan designations. The site is designated for Agricultural Conservation use except for the northeastern 80 acres, which are designated as a Planned Employment Center. • No Hillside D v 1 n rn r of ResidendalUnits: This alternative has three variations. In all variations, no development would occur on the hill areas above the 200-foot-elevation contour. In Variation A, a golf course and 866 single family residential units would be built on the lower areas. The 80-acre PEC area would be developed as specified in the existing General Plan. Variation B would be the same as Variation A, except the golf course would not be developed. The number of, single family residential units (866) would remain the same. :Michael Paoli and Associates V-1 Variation C would be the same as Variation A, -except only 650 single family residential units would be built on the lower areas along with the golf course. • Modifications Reatfsted by J!Ianning Commission: This alternative has four components which can be incorporated into the project together or separately (see Figure V-1). Component ,1 would reorient -the . . . neighborhood commercial and low density cluster housing land uses shown for the 26-acre area bounded by Balfour Road, (new) Concord Avenue, and the east-west collector street (5 Drive). Neighborhood commercial uses would occupy the northern 14.7 acres and the cluster residential units would occupy the southern 11.3 acres. Component 2 would replace about 1 I acres of the 16.7-acre park site with the SF-5000 designation. Component 3 would designate the 8-acre portion of the Assembly of God property west of new Concord Avenue for church use. Component 4 would realign new Concord Avenue so that it would become a frontage road adjacent to the proposed Delta Expressway. • Alternative Project Location: In this alternative, the 1,051 single family units and 18-hole golf course from the Spanos-owned portion of the project site would be located on about 470 acres southeast of the intersection of Fairview Avenue and the EBMUD Mokelumne Aqueduct, in northwest Brentwood (see Figure V-2). The 80-acre PEC area would remain at the southwest corner of Balfour Road and Concord Avenue. c. Project Objectives (1) City Objectives The following aspects of the project will advance the City's goals and accordingly should be considered the City's objective in evaluating the project: • The project's championship golf course will be a significant recreational opportunity currently unavailable within the City of Brentwood. • The residential component of the project will consist of a variety of housing types. The resulting homes and price ranges will address the needs of first-time, move-up, and estate home buyers. 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Y� •! �':"` *W.tel;�,.•1Y r4��A�lI��' �YCj�w iJ, ! � YE'. 141 ERS ��l 'S ! t, i���, ...... f � ♦4 ;�f y.,�y t! ,lei;� 111..%�. �. 1 4 �+�'.''�,.P ..t �.., 44 \• ptPp•B Ct, 1! . 4q 4Yyc � ""' '��' lr"� „i�•.�j� � —y �, •�:�. \`� S' "t+ sari =1 l..- � ��•+ ;'..` y THE FIGUREEID `S QUEST Michael paoll MODIFICATIONS COMMISSION and PLANNING Associates �� � �• ��� • ••fM1#lf1A.�r.•1.�11�� •i y!� at..+ atc.w •�* •*• �w:• -iii*w!w s R/r'd ��,*M�.lr���r• ,� i�l�l: I w+ •win • _•***•� f+► *, s+i*r«�. •' >: ♦* s • a*•• ••r• r r !r!!y•I.r a« yrr•• • •*wTza/ n•ws < i. •�r^�+. i 1[�•!(.��s ff*•-r N!!N•M«•�!* IJ'+ #jT� i 1* +C � �� **r r• **"^^ *ars• •►r a!s•1'••**:• • f 't• **• w r*s•*«►s s r(+1�r•«*f s• ..w* 1��fit� * ~ t "N`• ! •i!* 4 ! /�r♦�.♦ •ifs*i 4*.1•• **r . to r** A•«i*r*• *s*♦7 r�. •s s �il\/11�'�i�w_^'�R w **•r, r�� F5x /.t�A•s*►r+w!*!*r*�''r••��w��•"•11•r1 rl/��N�Nrr�.�"�'�*�**•sl•��l � * t * •* 1 i# Project .Planned Employment Center V Alternative Site s 00 Areas Proposed for Development • • y Othersf Michael . fI • The project will further the City's pians for Planned Employment Center uses along the Delta Expressway growth corridor, by the development of commercial and office uses. • The creation of jobs in the Planned Employment Center of the project will contribute to an improved balance between jabs and housing. • The project will facilitate the construction of the Delta Expressway, by providing right-of-way dedication, agreements, and construction financing. • The project will generate tax revenues along the Delta Expressway, and the Balfour and Concord Avenue roadways. The golf course, with its clubhouse, restaurant, bar, pro shop, and other facilities will also generate tax revenue for the City. • 'The project design includes a school site, parks, golf course, and other open space areas. • The project site was identified for potential future annexation in the 1988-1989 report by the City to the County and LAFCO, and in the updated report of September .1991. Eventual extension of utilities and other infrastructure to the site appears to be feasible. • The project represents development of land of lesser agricultural value and directs growth away from the agriculturally more valuable land to the east and south of the existing City limits. • The project will assist and facilitate the City's Capital Improvement Financing Program. (2) Applicant Objectives The Applicant has provided the following project objectives: • The project is a high-quality, mixed-use development consisting of commercial, residential, public, and open space uses that will benefit the existing citizens of Brentwood and enhance the general community. Specifically, the project will provide the following: ° A variety of duality recreational activities, including a site consisting of 40 percent open space. An attractively designed project that is harmonious with the existing aesthetic resources. Michael Paoli and Associates V-5 ° The project utilizes and enhances the existing, varied landscape. The distinct slope acrd "character of different portions of the site provide diverse opportunities for the design and selection of housing types, styles, and price .ranges that will be reflected in the proposed residential villages and neighborhoods. The high-quality, mixed-use housing will offer a residential option not presently available in the Brentwood area. The project will provide a harmonious transition to the surrounding property. ° The project will be compatible with the adjacent agricultural and residential uses. ° The project's golf course has been designed to complement and reflect the existing natural terrain of the land. The project site is the only property in the vicinity with the variety of character necessary to achieve all of both the City and the Applicant's goals. 2 . DESCRIPTION OF -SPECIFIC, ALTERNATIVES a. No Project (1) Location, Design, and Population Characteristics Under the No Project alternative, the proposed project site could continue to be used for agricultural purposes (grazing and orchards). There would be no development or resulting population on the site. (2) Attainment of Project Objectives The No Project alternative could not feasibly attain the objectives of the proposed project. (3) Elimination or Reduction of Significant Environmental Effects The significant unavoidable adverse effects of the proposed project would not occur under the No Project alternative. There would be no loss of agricultural land or oaks trees, no impacts on the circulation system, no impacts on air quality, minimal use of nonrenewable energy resources, no change in views, and no loss of historic cultural resources. V-5 Michael Paoli and Associates (4) Environmentally Superior Alternative The No Project alternative is environmentally superior to the proposed project. It completely avoids all impacts associated with the proposed project. b. Existing General Plan (1) Location, Design, and Population Characteristics Linder this alternative, the project site would be developed in accordance with the existing General Plan. Most of the site is currently designated for Agricultural Conservation, except for the northeastern approximately 80 acres, which are designated for Planned Employment Commercial (PEC) uses. According to the General Plan, the PEC designation allows for 51 percent of the land within a PEC area to be developed with employment-generating uses and 49 percent aflhe land to be developed with residential uses. The employment- generating uses within the PEC designation would be developed at an average Floor Area Ratio (FAR) of 0.25. Nonresidential uses within the PEC would include a mixture of research and development, office, light industrial, and related commercial uses. The residential uses would include a variety of housing types having an overall density of nine dwelling units per acre. Using a total PEC area of 80 acres, 40.8 acres (S 1 percent) would be developed with employment-generating uses and 39.2 acres (49-percent) would be developed with residential uses. At an average FAR of 0.25, 444,312 square feet of employment-generating uses could be constructed. At a density of nine units per acre, 353 housing units could be constructed. Eased upon the City of Brentwood's population per household figure of 3.056, the 353 housing units would have a population of 1,078. It is likely that the PEC area would be designed so that the employment- generating nonresidential uses would be located in the eastern portion of the 80 acres, oriented toward the proposed Delta Expressway and .Balfour Road. The residential uses would be located in the western portion of the 80 acres, buffered from the major roadways by the employment-generating uses. The 67.1 acres of the project site designated for Agricultural Conservation use would remain as grazing land. (2) Attainment of Project Objectives The Existing General Plan alternative could not feasibly attain the objectives of the proposed project. Michael Paoli and Associates V-7 (3) Elimination or Reduction of Significant Environmental Effects All but one of the significant unavoidable adverse effects of the proposed project would not occur under the Existing General Plan alternative. Development of the FEC-designated area would result in the loss of 58 acres of orchard land, which is classified as Prime Farmland. However, there would be no loss of.oak trees, as all of the: trees are on the 671 acres designated for Agricultural Conservation use. This alternative would also not result in.a significant change in views. Impacts upon the circulation system and air quality would be reduced to a less than significant level through a reduction in trip generation from 31,200 trips per day to 7,200 trips per day. Use of nonrenewable energy resources would also be substantially lessened. No impacts to historic cultural resources would occur because these resources are not within the PEC area. (4) Environmentally Superior Alternative Because it avoids all but one of the significant environmental effects of the project, the Existing, General Plan alternative is environmentally superior to the proposed project. C. No Hillside Development and Reduced Number of Residential Units (1) Location, Design, and Population Characteristics This alternative has three variations. In Variation A, no development would be allowed on areas above 200 feet in elevation. This would, for the most part, eliminate development on the hillsides and ridge lines. A lesser number of housing units, the golf course, and the PEC area would be built in the relatively flat, lower elevation areas. Subtracting the acreage of the hill areas (about 270 acres) and the 80-acre PEC area from the 750-acre project site would leave approximately 400 acres for residential development and a golf course. The golf course would consume about half of the 400 acres, leaving approximately 200 acres for single family residential development. If the 200 acres were developed at the same single family residential density of the proposed project (excluding open space), 4.33 units per acre, 866 single family residential units could be built. The total number of residential units under 'Variation A, therefore, would be 1,219 (866 single family units plus 353 multiple family units in the PEC area). The buildout population of Variation A, at 3.056 persons per household, would be 3,725. The square footage of the employment-generating uses in the PEC area would be 44.4,312. V-8 Michael Paoli and Associates Variation B of this alternative would be the same Sas Variation A, except that no golf course would be included, as requested for evaluation by City staff. Without the golf course, the residential density of the project would be reduced to 2.17 units per acre but the number of single family units (866) would remain the same. Variation C would be the same as Variation_ A, except that 650 single family units would be built instead of 866. The 650 units represents a 25 percent. reduction in the number of units, as requested for evaluation in this alternative by City staff. The total number of units for Variation C, therefore, would be 1,003 (650 single family and 353 multiple family) with a population of 3,065. (2) Attainment of Project Objectives Variations A and C of this alternative could reasonably attain the objectives of the project. Variation B would not attain the objective of providing golf course recreational opportunities to residents of the project and the public. (3) Elimination or Reduction of Significant Environmental Effects All variations of this alternative could avoid the loss of oak trees on the site and would substantially avoid the change in views caused by the development of hill areas. There would still be a significant loss of agricultural land. Traffic generation would be reduced substantially, however, impacts to regional roadways and regional air quality would remain significant. The loss of nonrenewable energy resources would remain significant. All variations of this alternative could be designed so that the historic cultural resources on the site are preserved. (4) Environmentally Superior Alternative All three variations of this alternative are environmentally superior to the proposed project because they avoid several of the significant impacts of the proposed project. d. Modifications requested By Planning Commission (1) Location, Design and Population Characteristics This alternative has four components which can be incorporated into the project together or separately (see Figure V-1). These components are being considered at the direction of the Brentwood City Planning Commission. Component 1 would reorient the neighborhood commercial and low density cluster housing land uses shown for the 26-acre area bounded by Balfour Road, (new) Concord Avenue, and the east-west collector street (5 Drive). The land Michael Paoli and Associates V_g uses would be reoriented so that the neighborhood commercial area occupies the northern 14.7 acres and the cluster residential area occupies the southern 11.3 acres. This.component would not result in any changes in number of units, population, or commercial square footage. The primary access to the shopping center, as rearranged, would be from Balfour Road rather than Concord Avenue. There would appear to be no significant advantage or disadvantage in orienting the uses either way. Component 2 would replace about 11 acres of the 16.7-acre park site (Clark property and adjacent Spanos remnants) with the SF-5000 designation. Development of this property with single family residences instead of a park would result in an increase of 55 single family units. Replacement of the park site with residences would leave the project site with an inadequate amount of park acreage for its population, based upon General Plan standards (see Section R). Implementation of the mitigation measure specified in Sections F and U of providing a park site on the southeast knoll area of the project site (to preserve oak trees and the mine site), however, would allow the park acreage standard to be substantially met. Component 3 would designate an approximately 8-acre portion of the Assembly of God property west of new Concord Avenue for church use. Development of this property with a church and related facilities instead of SF-6000 single family residences would result in a reduction of 34 single family units. This appears to be an appropriate location. for a church and related facilities because of its location on Concord Avenue and because it can serve as transitional use between adjacent Planned Employment Center uses and single family residential uses. Component 4 would realign new Concord Avenue so that it would become a frontage road adjacent to the proposed Delta Expressway. No appreciable changes in number of units or commercial square footage would result. Extension of the local street which divides the park site and the high density cluster residential area through the PEC area to existing Concord Avenue would provide for adequate access to these uses. If, however, a church and related facilities are placed on the SF-6000 property south of the school site, as proposed in Component 3, access to the church property would appear to be inadequate. The Concord Avenue alignment, as proposed in the project land use plan, provides a separation, or buffer, between the PEC uses and the residential uses to the west. Without Concord Avenue intervening, there would be a direct interface between the PEC area and the high density cluster residential area and between the PEC area and the SF-6000 (Component 3) property. This could lead to potential land use conflicts. V-10 Michael Paoli and Associates ................................................................................ (2) Attainment of Project Objectives Under any or all of the components of this alternative, the objectives of the project could be attained. (3) Elimination or Reduction of Significant Environmental:Effects None of the components of this alternative, taken individually or collectively, would eliminate or avoid the significant environmental effects of the project. (4) Environmentally Superior Alternative This alternative would not be environmentally superior to the proposed project. e. Alternative Project Location (1) Location, Design, and Population Characteristics In order to identify an alternative site for analysis, a scoping process was undertaken to locate undeveloped land within the City's general Plan area which would have the potential to accommodate the project. The specific factors considered were as follows: • Is the acreage of the land sufficient to accommodate the project (at one location or divided among several locations)? • Is it feasible. for the City of Brentwood to annex and provide urban. services to the land? • Is the land within Contra Costa County's 65/35 Land Preservation Standard Urban Limit Line? Can the site logically accommodate the planned uses and attain the basic land use and design objectives of the project? • Is the land proposed for development by others? The City's Planning Area was chosen as a reasonable boundary within which to consider alternative sites. Land outside the Planning Area to the east and south is generally Prime Earrnland and beyond the County's Urban Limit Line. Land to the north of the Planning Area is either developed, broken up into small parcels, or proposed for development either as part of the City of Antioch or on unincorporated County land. West of the Planning Area, sloping terrain becomes prevalent and the land would be further from utilities and infrastructure than the proposed project site. Such land would be likely to result in greater development constraints and environmental problems than the project site. Michael Paoli and Associates 1 Figure V-2 indicates the land within the City's Planning Area that was considered in attempting to identify alternative sites for the project and the one site that was finally identified by the City as being a potentially feasible alternative site for the project. The figure also shows the City's Planning Area and Sphere,of Influence boundaries and areas proposed for development by others, based upon the City's Project Status Report map. The County's.Urban Limit Line generally runs along the City's eastem Sphere of Influence boundary and along its southern Sphere of Influence boundary as far west as Marsh Creek. Almost all of the undeveloped properties of sufficient size to accommodate the project are either proposed for development by others or beyond the Urban Limit Line. The remaining areas are either too small to accommodate the project or are broken up into too many parcels to be feasibly assembled for the project. The area identified as the .alternative site is comprised of about 470 acres generally located southeast of the intersection of Fairview Avenue and the EBMUD Mokelumne Aqueduct (see Figure V-2). This land is designated for Urban Low-Low Density Residential (up to three dwelling units per gross acre) by the Brentwood General Ilan except for the small area west of Fairview Avenue, which is designated for Ranchette-Estate Residential (one dwelling unit per gross acre maximum). All but the portion of'the site located east of the Southern Pacific Railroad is within the City limits. For the alternative site analysis, only the 1,051 residential units and golf course from the Spanos portion of the project site would be developed on the alternative site. The 1,051 single family residential units would be less than the 1,282 units which would be allowed under the existing General Plan designations for the alternative site. The PEC portion of the proposed project would remain at the southeast corner of Balfour Road and Concord Avenue, where it would be developed in accordance with the existing General Plan (444,312 square feet of employment-generating uses and 353 multiple family dwelling units). A PEC area, school site, park site, and neighborhood commercial center were not evaluated on the alternative site because they are no-t designated for the site by the General Pian. (2) Attainment of Project Objectives The alternative site would appear to contain the acreage necessary to accommodate the single family residential and golf course portion of the proposed project. However, the alternative site is split by a railroad, two existing streets, and two planned thoroughfares. This would prevent the alternative site from being feasibly designed as a cohesive residential development with a golf course (see further discussion under Environmentally Superior Alternative below). Additionally, the Planned Employment Center uses V_12 Michael Paoli and Associates would be separated from the residential uses on the alternative site. For these reasons, the alternative site would not attain th6 objectives of the proposed project. (3) Elimination or Reduction of Significant Environmental Effedts The entire 470-acre alter-native site is classified as Prime Farmland according to.. the Contra Costa County Important Farmland Map (Department of Conservation, 1988). In contrast, only 58 acres of the project site are designated as Prime Farmland. Development of the alternative site, therefore, would result in a greater loss of Prime Farmland, According to an EIR completed for the annexation of the majority of the alternative site to the City, development of the alternative site would not result in a significant loss of important vegetation and wildlife habitat (Donaldson Associates, 1.990). The proposed project, in contrast, would result in a significant loss of oak trees. Development of the alternative site with 1,051 dwelling units and an 18-hole golf course would generate approximately 10,700 daily trips. Based upon the annexation EIR and the fact that,the proposed 1,051 units would be less than the 1,282 single family residences allowed. by the General Plan for the alternative site, it is likely that alternative site traffic on the adjacent street system could be. mitigated. However, since significant impacts to regional roadways are predicted with or without the project, cumulative impacts on regional roadways would likely remain significant. Development of the alternative site would result in air pollutant emissions that would exceed the Bay Area Air Quality Management District's threshold of significance for regional emissions. Development of the alternative site instead of the project site would eliminate the significant visual impact resulting from development of the hill areas of the project site, The alternative site is flat agricultural land. The alternative site has been intensively farmed for many years and was not identified as having any significant cultural resources in the annexation ETR. Development of the alternative site would eliminate.the potential loss of the significant historic cultural resources identified on the project site. (4) Environmentally Superior Alternative The alternative site would have advantages over the project site in that it is already designated for development by the General Plan, is substantially within the City limits, and would avoid significant impacts to biological, cultural, and visual resources, Michael Paoli and Associates V-13 The alternative site also has a number of disadvantages. All of the 470-acre alternative site is Prime Farmland, as opposed to 58 acres of the project site. The alternative site is bisected by the Southern Pacific Railroad and crisscrossed by the existing and planned circulation system for the area. The railroad is a significant noise source and there are safety concerns related to the potential for railroad-related accidents. The -site is crossed by two existing north-south streets, Fairview and Minnesota Avenues. These streets are designated as thoroughfares in the General Plan. Additionally, the General Plan shows two future thoroughfare streets passing through portions of the alternative site. The planned extension of Sand Greek Road will pass in an east-west direction through the southern portion of the site and the extension of G'Hara Avenue will pass in a northwest to southeast direction through the portion of the alternative site east of the railroad. These roads will be sources of noise and would constrain site planning for residential uses and a golf course on the site. Based upon the above discussion, the alternative site is not considered to be environmentally superior to the project site. 3 . IDENTIFICATION QE-- ENVII&QNMENTALLY -- SUPER-IO-R ALIERNATIVE The State CEQA Guidelines require that the environmentally superior alternative be identified and that if the No Project alternative is identified as the environmentally superior alternative, a choice among alternatives must be made. Based upon the preceding discussion, the No Project Alternative is clearly the environmentally superior alternative. It is the only alternative that completely avoids all impacts associated with the proposed project. Therefore, a choice among the remaining alternatives must be made. Among the remaining alternatives, the Existing General Plan alternative is superior. It would avoid all of the significant unavoidable impacts of the project except the loss of Prime Farmland. V-14 Michael Paoli and Associates SECTION 'W RELATIONSHIP BETWEEN SHORT-TERM USES AND LONG-TERM PRODU TIVIT"Y/CI.JII VLATIVE IMPACTS 1. . INTRODUCIIQN The cumulative and long-term effects of the project which would adversely affect the state of the environment are discussed in Sections C through U. This section will describe the cumulative development scenario evaluated in the preceding sections and presents a summary of the significant cumulative environmental impacts identified in the sections. 2 . CUM11LATIVE DEVELOPMENT SCENARIO The cumulative development scenario evaluated in the. EIR was formulated by City staff in Spring 1991, and represents an aggregate of buildout projections for all traffic zones within the City's planning area (see Figure W-1). The buildout projections are based upon the following: • For the traffic zones, or portions thereof, in which there was a known development proposal or approved but as yet unconstructed project, the number of residential units and/or nonresidential building square footage of the project or proposal was used. For those areas in which there was no development proposal or approved project, . development in accordance with the designations of the Brentwood General Plan was used. • For developed areas, the existing number of dwelling units and population for 1991 was used. Essentially, the cumulative development scenario approximates the buildout of the existing General Plan as modified by current development proposals. According to California Department of Finance 1991 estimates, the City of Brentwood has 2,788 dwelling units and a population of 8,255. Buildout of the cumulative development scenario would result in the development of an additional 13,664 dwelling units and a population increase of 41,157. (The 1991 Department of Finance population per dwelling unit figure of 3.056 for the City of Brentwood was used to calculate the population). The total number of dwelling units and population at buildout of the cumulative development scenario (adding existing units and population to proposed/planned units and population) would, therefore, be 16,452 dwelling units and 50,012 population. Michael Paoli and Associates W-1 ��smneff. .. ....� .-" ••••i _w.�� ■■:_.�i►�!�r "�_"" ` .amt e 4 � � � �,��Ieiiia 1 R.��■��Y by � .�yff•A.a! •'r n..r � •M. ►yO�wy� wom nPi- �t �',���t .'.�."�-'7elt~s; e.Rt�l■��..♦�``1�'ti�►lgr�"Yt'1C�"r:#!�«�.�".�,R♦� yam} tJ"i��itj��i:7fR.l#1 r I •�,!.:V�w+���1 ,j�v '� 1F �0y. i PROJECT AREA Hancock Project RRRRt e'v's Brentwood Lakes 4GarinRanch f • s : ssa C. .• wf Adjacent Properties Michael Paoli MAJOR PROJECTS . . and CUMULATIVE t • Associates Three major development proposals are included in the cumulative development scenario, in addition to the proposed project: .Hancock, BlackhawklNunn, and Ga.-in Ranch. These projects are either proposed for development on land not currently designated for urban uses in the General Plan (Hancock and eastern half of Gann Ranch) or proposed development that is substantially different from the existing General Plan land use designations for their locations (B1ackhawk/Nunn). The three projects are described below;.the location of each is shown on Figure W-1. The Hancock proposal encompasses 433 acres located across Balfour Road immediately north of the project site, and proposes the development of 926 single family residences, an 18-hole golf course, a shopping center, and a sehooI site. The Hancock property is within the General Plan area and the Sphere of Influence, but is not within the City limits. It is designated by the General Plan for Agricultural Conservation uses. • The Blackhawk/Nunn (Brentwood Lakes) proposal is located on 369 acres east and northeast of the project site and proposes the development of 1,062 residential units and about 516,000 square feet of employment- generating commercial uses. This property is inside the'City limits and designated for Planned Employment Center uses. • The Garin Ranch property comprises 438 acres located generally east of downtown Brentwood, between Balfour Road and Sycamore Avenue. The site would be developed withl 2,226 dwelling units, 12 acres of commercial uses and 8 acres for administrative school facilities, and 58 acres for park and storm drainage facilities. The vast majority of the site is outside the City limits and the eastern approximately one-half of the site is outside the Sphere of Influence. The eastern one-half of the Garin Ranch site is designated by the General Plan for Agricultural Conservation, while the western half is designated primarily for urban residential uses. 3 . SUMMARY OF SIGNIFICANT CUMULATIVE IMPACTS The potential significant adverse effects of the project as they relate to long-term cumulative conditions are summarized below. As noted above, these cumulative impacts are discussed in detail in Sections C through U. These sections also analyze potential mitigation measures for anticipated cumulative impacts. rcultural Resources Full development of the Brentwood General Plan and the projects considered in the cumulative analysis would result in the development of about 9,800 acres, a substantial portion of which is used for agricultural purposes and designated as Prime Farmland on the Centra Costa County Important Farmland Series Map Michael Paoli and Associates W-3 (Department of Conservation, 1990). This is considered to be a significant unavoidable adverse impact (see Section D,-Agricultural Resources). Seismic Hazards The increased population resulting from buildout of the cumulative development scenario will be exposed to potential hazards from seismic activity. The Brentwood area could be impacted.if a large earthquake were to occur on one of _ the active faults of the San Francisco Bay area. Because Brentwood is some distance from the major active faults of the Bay Area, the intensity of groundshaking felt in the Brentwood area would be less than in the Bay Area. Some of the smaller faults that run through the planning area have not been completely mapped and characterized as to their potential activity (see Section E, Topography, Geology, Soils, and Seismic Hazards). Biological Resources Development .cif the proposed project, together with all other projects considered under the cumulative development scenario, will result in the conversion of 9,800 acres of mostly agricultural open space to urban development. This conversion will result in a loss of existing plant communities and wildlife habitat, and the consequent loss or displacement of the wildlife dependent on the habitat. The type and quality of habitat that will be lost and the extent to which wildlife will be lost or displaced cannot be determined without a comprehensive assessment of all land planned for' development. Habitat which is at least minimally suitable for sensitive species, including the San Joaquin kit fox, the valley elderberry long-horned beetle, and the burrowing owl, will be lost. Moreover, there is the potential that additional oak trees will be lost to development (see Section F, Biological Resources). 'T'raffic and Transportation The traffic generated by cumulative development would have significant impacts on up to 33 intersections within Brentwood, upon regional roadways, and upon seven intersections in Antioch (see Section G, Traffic and Transportation). Air Qualit The growth in population and vehicle use that will result from buildout of the Brentwood General Plan area in accordance with the cumulative development scenario will affect the emission of regional pollutants such as reactive organic gases and nitrogen oxides. Current projections are that regional emissions of these pollutants will decrease in the future, despite cumulative growth 'in population and vehicle use, due to regional programs for reducing emissions that are in place or currently being considered. Continued improvement in regional air quality is projected through the year 2000, although attainment of all air W-4 Michael Paoli and Associates quality standards throughout the entire Bay Area Air Basin is not projected by the year 2000 (see Section H, Air Quality). Noise Significant increases in noise on Balfour Road and Concord Avenue would result due to the increase in traffic from cumulative development. Noise from traffic on the future Delta Expressway would also affect the project site (see Section 1, Noise). Public rvices and Facilities Buildout of the cumulative development scenario could significantly impact a number of public services and facilities related to storm drainage, water supply, wastewater collection and treatment, solid waste, law enforcement, fire protection, schools, parks and recreation, and gas and electricity (see Sections J, K, L, M, 0, P, Q, R, and S): Nonrenewable Energy Resources Development resulting from buildout of the Brentwood General Plan area in accordance with the cumulative development scenario would consume substantial amounts of nonrenewable energy resources such as gasoline, diesel fuel, and natural gas (see Section S, Energy Supply and Usage). A�stl�eiics Scenic vistas afforded by the agricultural open space land in the Brentwood General Plan area will be lost as the land is developed with urban uses. Further, views that are aesthetically offensive to some may be created by the development. Cultural Resources Since much of the General Pian area has not been systematically surveyed for cultural resources and since it is likely that previously unrecorded cultural resources exist, cumulative development in this area could adversely affect prehistoric and historic resources or areas with unique cultural values (see Section U, Cultural Resources). Michael Paoli and Associates WW5 SECTION X SIGNIFICANT IRREVERSIBLE ENVIRONMENTAL CHANGES Nonrenewable resources which would be irreversibly used or committed during the initial and continued phases of the project include the following: • the loss of 58 acres of Prime Farmland and 693 acres of grazing land (see Section D); • the loss of oak trees (see Section E); • the use of fossil fuels, such as gasoline, diesel fuel, fuel for electrical power generation, and natural gas (see Section S); • the change in views caused by the grading and development of the hill areas (see Section T); • the use of construction materials (sand, gravel, petroleum-based products, metals, etc.). It is unlikely that the uses proposed for the project would be prone to accidents that would cause irreversible damage to the environment. Michael Paoli and Associates X-1 ....._...._ ..................................................................................................................... SECTION Y GROWTH-INDUCING IMPACTS 1 . INTRQDUCTION The purpose of this section is to evaluate the potential of the project to induce urban growth in its vicinity. The main factors influencing the potential for growth are public land use policy, availability of urban services, and any geographic or environmental constraints to growth in the project vicinity. The potential for the project to induce economic growth in the community is also discussed. 2 . PUBLIC LAND USEPOLICY -CONSTQERATI-ONS All but the . outhern 100 acres of the 751-acre project site is within the Brentwood General Flan area. The General .Plan area covers all land within the Brentwood City limits as well as unincorporated land outside the City that has been determined by Brentwood to bear a relation to its planning efforts. Although the vast majority of the project site is within the General Plan area, only the northeasterly 80 acres are within the City's Sphere of Influence and . none of the site is within the existing City limits. The project site does, however, abut the City limits along a portion of its eastern boundary. The Brentwood General Plan designates all but the northeastern 80 acres of the project site for "AC" Agricultural Conservation use. The 80 acres in the northeast corner of the project site are designated "PEC" Planned Employment Center, in order to provide job-generating uses adjacent to the future .Delta Expressway. Project approval and ultimate development would require an amendment to the General flan to change the land use designation of the site from Agricultural Conservation and Planned Employment Center to various urban designations, an amendment of the Sphere of Influence boundary, and annexation to the City of Brentwood. The act of redesignating the site for urban uses amending the Sphere of Influence to include the site, and annexing the site to the City may have a growth-inducing effect on adjacent properties to the south and west because the Sphere of Influence and City limits would be moved immediately adjacent to these properties. These properties are being considered for urban development as part of the City's General Plan update process. Michael Paoli and Associates Y-1 Properties to the north and east, however, would not likely be affected by changes in the Sphere of Influence and annexation ,of the project site. These properties are the subject of pending development proposals and are already within the City's Sphere of Influence. Land to the east of the site is also partially within the City limits. The project site is proposed to be removed from a Williamson Act contract. Land south of the site is under a contract which will expire in February 1996. Lands to the north, west, and east of the site are not under contract. The absence or pending cancellation of Williamson Act contracts in the project vicinity is a factor which may facilitate growth. The fact that the lands surrounding the site are generally held in large parcels and are not intensively farmed may also facilitate growth in the area. Contra Costa County has established a 65/35 Land Preservation Standard which limits urban development to no more than 35 percent of the land in the County and requires that at least 65 percent of all land in the County be preserved for agriculture, open space, wetlands, parks, and other non-urban uses. The standard is implemented by the County's Urban Limit Line, a boundary beyond which no urban uses can be designated. The proposed project and adjacent lands are within the Urban Limit Line and, therefore, are not an impediment to development in the project vicinity. 3 . , AVAILABILITY OF URBAN SERVICES/INFRASTRUCTURE The urban services and infrastructure that are most fundamental in allowing urban development to take place are water service, sewer service, and street improvements. Without them, urban-level development cannot take place. Water and sewer service are-currently unavailable in the project area. The closest water mains are at the intersection of Fairview Avenue and Dainty Avenue and the intersection of Balfour Road and Minnesota Avenue, approximately one mile east of the site. Major water service improvements will be necessary in order to serve the project, including a new municipal well and two new, higher-elevation storage reservoirs. The nearest wastewater collection line to the project site is east of the intersection of Fairview Avenue and Balfour Road, approximately one-half mile east of the site. This 18-inch line would need to be extended to the project site. Although this line would have the capacity to serve the project site, the wastewater treatment plant does not have the ability to handle the effluent generated by the site and would need to be expanded. The streets adjacent to the project site are two-lane, _rural roadways. As noted in Section G, Traffic and Transportation, a number of street widenings, Y-2 Michael Paoli and Associates improvements, and intersection signalizations will be necessary to accommodate the traffic generated by the project. " Extension of services to the project site and to the Hancock project to the north will be accomplished through the implementation of a Capital`Improvement Financing Program (CIFP). The Applicant, the Hancock project, -Garin Manch, and a number of other projects have agreed to participate in a CIFP (No. 91 -I) to provide the necessary infrastructure improvements to accommodate urban development. The specific type and extent of improvements have' not been determined for the CIFP. The Blackhawk/Nunn project, to the east of the site, is part of an earlier CIFP. Implementation of a CIFP, which would extend services and infrastructure and allow for urban-level development of the project site, could have a growth- inducing effect by making it easier to subsequently extend services to the ram-elands to the west, south, and southeast. However, these lands would not be able to develop unless a new CIFP was formed to include them. 4 . QEQQ ..H1C ENY1RQNMENTAL COISSTRAINTS Geographic and environmental constraints to urban growth can include physical barriers such as a river or water body, floodplains, steep slopes, and nearby environmentally undesirable land uses, such as landfills, heavy industrial areas, railroads, or airports. None of these constraints are apparent in the project vicinity, with the exception of steep slopes. The slopes may or may not constrain development, depending on the extent to which the City will allow grading for roads and lots. It should also be noted that the Davis Fault passes to the west of the project site, and building setbacks from the fault line may be necessary. In addition to inducing urban growth in its vicinity, the project has the potential to induce economic growth in the community. This growth could come from at least two major sources. the temporary and permanent jobs that would be generated by the project and the demand for goods and services that would result from residents of the project. The permanent employment generated by the project, estimated at 1,456 jobs, together with the long-term temporary jobs resulting from construction activity, would represent a major new source of income in the Brentwood area. The project would also generate an additional demand for retail goods and services in the Brentwood area. Some of this demand would not be met by the neighborhood-level shopping center proposed for the project site. For example, the estimated 4,957 residents of the project would generate a relatively significant demand for the comparison shopping opportunities that are typically found at community or regional shopping centers. This demand would not be ?viichae Paoli and Associates Y-3 met on the project site but could be filled by existing or new centers elsewhere in the community. Likewise, the demand for service-oriented businesses, such as plumbers, printers, and automotive repair, would probably not be met on the site but could be filled by existing or new businesses at other locations in Brentwood. The project would be a major source of new housing and employment, Because of the limited amount of retail commercial development that is proposed, however, the project should not be a significant source of competition for existing retail and service centers and may actually enhance the. business of these centers. Y-4 lvi.ichael Pauli and Associates APPENDIX C-1 PRELIMINARY BRENTWOOD GENERAL PLAN UPDA'T'E LAND USE ELEME-NT Growth Strategy Goat 1: Provide for orderly, well-planned and balanced growth within the Brentwood Planning Area to the year 2020. Objective 1.1: Within the planning area, Brentwood should have a,population of 73,000 to 107,000 at buildout. Objcctive 1.2: Create a diverse, self-sufficient community which offers a broad spectrum of job opportunities, housing types, community facilities and corrunercial area. Objective 1.3: .,,.--Manage the creation, location and type of development to ensure that: a) balance between jobs and housing is maintained, (b) adequate public services and facilities are available, (c).housing needs are berg met, and (d) growth occurs in a manner acceptable to the community. Objective 1.4: Maintain City control of development within its planning area by: (a) establishing its Sphere of influence coterminous with the urban boundaries established by the Land Use Map, (b) encourage early annexation of all lands within its Sphere of influence. Objective 1.5: Develop a growth strategy which maintains local autonomy while operates in a regional context. Objective 1.6 The principal means of regulating new development shall be Planned Development Zoning or Specific flans. Comrnuni!y Structure Goal 2: Provide a community structure that clearly identifies the desired development pattern in Brentwood. Objective 2.1: Maintain Brentwood as a free-standing conununity surrounded by foothills, farmland and other open space. Land Use 12/12/91 Objective 2.2: Develop a community structure consisting of the following components: a) Sub-neighborhood b) Neighborhood c) Village d) City Objective 2.3: Protect and enhance the Downtown as the physical focal point of the community and its economic, cultural, and governmental center. Jobs Housing Goal 3: Achieve a jobs housing balance of .88, or 88 jabs for every 100 households. Objective 3.1: Designate the appropriate amount of land area for various employment generating uses. Objective 3.2: Ensure that an adequate inventory of vacant industrial/commercial land is maintained. Objective 3.3: Encourage extension of public utilities to Planned Employment Centers. Residential Development Goal 4: Preserve and enhance the high quality within existing residential areas. Objective 4.1: Support rehabilitation and conservation of existing housing through redevelopment and other housing programs. Objective 4.2: Minimize disruption to existing neighborhoods which may be caused by adjacent new development or major public facilities. Potential Policies Lot sizes xdrhin new develoment shall be compatible with lot silTes in adjacent existing deVelapr»etrt. The zoning ordinance shall be amended to include standards for buffer, areas on lots which contain nvo-stoat divelling units. Land Use 12/12/91 Objective 4.3: Enhance the security of neighborhood`s-through City sponsored programs such as Neighborhood Watch. Objective 4.4: Provide municipal services (sewer, water, drainage, and-roads) to existing residences within the planning area. Potential Policies Require that construction of off and on-site facilities occur concurrent with development to eliminate impacts to facilties and services. Improvement requirements and phasing of improvements shall be clearly specified through the development approval process or development agreemenrts for every project. Objective 4.5.• Establish minimum and maximum.floor area ratios to regulate the intensity of development. Neighborhood Organization Goal 5: Encourage a neighborhood organization that promotes a high quality livill,, environment. Objective 5.1: Promote low density residential adjacent to open space or areas to remain in agricultural use and Iocate higher density residential development bin proximity to activity nodes.. Objective 5.2: Expand the range of single-family housing opportunities to provide for income groups of age categories, including housing suitable and affordable for individuals working in.&entwood. Objective 5.3: Residential development shall respond to the environmental setting, maintain open space and preserves the existing natural resources. Objective 5.4: Provide adequate park, open space and recreational facilities within each neighborhood. Objective 5.5: Provide a diversity of housing types within each neighborhood. Objective 5.5: Provide safe and direct pedestrian linkages between residential areas and school sites, parks and community activity centers. Objective 5.7: Promote centrally located community activity centers within neighborhoods. Land Use 12/12./91 Objective 5.8. Ensure that new sub-neighborhoods are complementary and consistent in character to adjacent existing neighborhoods. While neighborhoods shall be complementary, the design within rcw development should create a distinct character within the neH, neighborhood. Obiective 5.9: Design circulation system which promotes the integrity and quality of residential areas. Land Use 12/1 2/9 .......................................................................................................... COMMUNITY STRUCTURE Catetory No of Population Components Dwetlinp, Size Units Sub-Neighborhood 50-150 140-450 Distinct housing type served by local streets Mini-Parrs Neighborhood 1,500 4,275 Neighborhood park Elementary school Convenience commercial Bounded by arterial streets VLUage 3,040-5,000 8,.5SO-14,250 Intermediate school Commercial center anchored by supermarket Access to arterial street and highways Community facilities, day care centers, churches, clubs, etc. City 20,000 57,000 Community park High school Community and regional commercial Government center Employment uses Land Use 12/12/91 Commercial Development Goal 6: Encourage the development of commercial land uses and, the revitalization of existing uses that strengthen the City's economic Luse and offer a range of commercial enterprises that serve the needs of residential and visitors. Objective 6.1: Retain Downtown as the community's central focal point oriented towards specialty and community shopping; civic and cultural activities. Objective 6.2: Ensure that the mix of uses within the Downtown meets the shopping and service needs of the adjacent neighborhood. Objective 6.3: Limit retail commercial uses along the Delta Expressway to those which serve a regional market. Potential Police: Businesses abutting the Delta Expressway shall provide aesthetically pleasing landscape buffers along the expressway frontage. Objective 6,4: Each village shall provide a shopping center anchored by a supermarket with supporting commercial to meet the shopping and service need of its residents. Objective 6.5: Allow small scale convenient neighborhood commercial uses at major intersections along thoroughfares to serve neighborhoods and reduce 'traffic, air qualiry, and noise impacts. These centers are subject to locational criteria. Potential Policy: Small scale convenient neighborhood commercial shall be in accordance with the following location criteria. a. Site area shall not exceed one acre, b. No other existing or planned commercial area is located within on- half mile of the site. C. Site is located at the intersection of two thoroughfares. d. Commercial use is found compatible with the abutting land uses. e. The adjacent streets can accomodate commercial traffic without causing unacceptable ingestion or safer, hazards. Objective 6.6: Improve the appearance of older cornunercial buildings and assist businesses through redevelopment programs. Objective 6,7. Ensure that commercial projects reflect the City's concern for high quality Land Use 12(12/91 development, ensures the provision of adequate infrastructure and avoid the appearance of strip development. ObjectNe 6.8.' Encourage the development of child care facilities vi thin commercial development to provide a central location for the residents of BeenN,00d to obtain services and com,enience shopping. Objectii,e 6.9.• Establish minimum and maximum floor area ratios to regulate the intensity of development. Land Use 12/12/91 Industrial Develovment Goal 7: Provide for industrial development opportunities to diversify Brentwood's employment lase and provide employment opportunities for City residents and the greater region. Objective 7.1: The development of Planned Employment Centers shall be the principle source of economic development and job creation. Potential Policies: Employment generating uses along the Delta Expressway should have the following characteristics: a) High quality architectural and landscaping.design. b) Average of 20 employees per acre. c) Outdoor storage or activities should not be allowed. Objective 7.2: Encourage new, clean employment-intensive industry to locate in H rent-wood. Objective 7.3: Ensure that high quality industrial site and architectural design is achieved which addresses impacts to adjacent land uses. Objective 7.4: Provide a wide range of industrial uses within the planting area including business parks, light industrial and general industrial. Objective 7.5: Establish minimum and maximum Poor area ratios to regulate the intensity of development. Institutional Land Uses Goal 8: Ensure the opportunity to develop institutional land uses. Objective 8.1: Provide for an adequate amount of institutional land uses to meet the social, economic, cultural, spiritual and education needs of the residents. Land Use 12112/91 Open Space and Agricultural Lands Goal 9: Establish open space areas within and around Brentwood that strengthen the definition or the community and reinforce (lie agricultural character. Objective 9.1: Utilize open space areas to minimize conflicts between adjacent land uses and provide for recreational opportunities within development. Objective 9.2: Establish visual corridors that maintain views of the surrounding countryside and significant natural features and provides viewsheds within developments. Porential Policies: Ensure the maximization of views to parrs and golf courses through the development-revie-w process. Develop height limits along the Delta Expressway to provide views to the Brentwood and the surrounding counrgside. Communities shall not be walled off from arterial and collector roodWays, instead, side-on treatritent shall be utilized. Objective 9.3: Create open space areas in and around the community that preserve natural resources and agricultural lands. Objective 9.4: Maintain prime agricultural lands south of ECCID main channel and east of Sellers Avenue and direct urban growth to the west and the north. Objective 9.5: Establish open space areas 4e-protect the community from risks associated with flooding and other public, health and safety issues. Public Safety C;oaI 10: Locate land uses to ensure the safety or residents in Bren(wood. Objective 10.1: Limit the intensity of development in areas exposed to geologic an/or flood hazards. F:\DATA\P"2r OJDATA\BR.E-OZ'r,OAL.d OSN-V,,DU5G.GLS Land Use 12/12/91 APPENDIX F-1 REPRESENTATIVE BIOTA Representative "Vascular Plants of the A. G. Spanos Planned Residential/Commercial Project and Vicinity, .-Brentwood, C.A. This partial listing is based on April through June 1990 field studies; nomenclature is according to Munz (1959, 1968). FAMILY SCIENTIFIC NAME COMMON NAME Malvaceae Malva neglecta Umbrella mallow Malva nicaeensis Nica's malva Malva parviflora Cheeseweed Geraniaceae Erodium botrys Longbeaked storksbill Erodium circutarium Redstemed storksbill Erodium moschata Musk filaree Cruciferae Brassica nigra Black mustard Capsella bursa-pastoris Shepherd's purse Raphanus sativus Wild radish Sisymbrium officinale Dredge mustard Caryophyllaceae Silene douglasii Douglas' catchfly Stellaria media Chickweed Spergularia macrotheca . Sand spurry Cactaceae Opuntia sp. Prickly pear Polygonaceae Rumex crispus Curly dock Euphorbiaceae Eremocarpus setigerus Turkey mullein Frankeniaceae Frankenia grandifolia Alkali herb Plantaginaceae Plantago lanceolata English plantain Asclepiadaceae Asclepias fascicularis Narrowleafed milkweed Convolvulaceae Convolvulus arvensis Field bindweed Solanaceae Datura meteloides Jimsonweed Solanum xanthi Purple nightshade Hydrophyllaceae Phacelia distans Common phacelia Boraginaceae Amsinckia intermedia Fiddleneck Plagiobothrys nothofulvus Popcorn flower Heliotropum curassavicum Salt heliotrope Scrophulariaceae Orthocarpus densiflorus Owl's clover Urthocarpus purpurascens Owl's clover Labiatae Marrubium vulgare Horehound Stachys bullata Hedge nettle Rosaceae Prunus amygdalus Almond Rubus vitifolius Blackberry Leguminosae Lupinus latifolius Broadleafed lupine Lupinus succulentus Arroyo lupine Medicago polymorpha Bur clover Trifolium sp. Clover Fagaceae Quercus douglasi Blue oak Quercus lobata Valley oak Casuarinaceae Casuarina equisetifolia Beefwood Juglandaceae Jugians rejig x hindsii Black walnut Salicaceae Salix sp. Willow Moraceae Ficus carica Fig Loranthaceae Phorandendron tomentosa Greenleaf mistletoe Meliaceae Melia. azedarach Chinaberry tree Urnbelliferae Conium maculatum Poison hemlock Foeniculum vulgare Fennel Rubiaceae Gallium aparine Bedstraw Caprifoliaceae Sambucus mexicana Elderberry Compositae Achyrachaena mollis Blow wives Agoseris apargioides Mountain dandelion Centaurea solstitialis Star thistle Cynara cardunculus Cardoon Grindelia camporum Creat valley gumplant Lactuca serriola Prickly lettuce Matricaria matricarioides Pineapple weed Senecio vulgaris Common butterweed Silybum marianum Milk thistle Taraxacum offinale Dandelion Xanthium strumarium Cocklebur Typhaceae Typha angustifolia Narrowleaf cattail Amaryllidaceae Brodiaea laza, Grass nuts Brodiaea pulch.ella Blue dicks Cyperaceae Carex sp. Sedge Graminae Anthoxanthum odoratum Sweet vernal grass Avena barbata Slender wild oats Avena fatua Wild eats Bromus mollis Soft brume Distichlis spicata Salt grass Festuca megalurs Foxtai.l grass Hordeum leporinum Hare barley Hordeum stebbensi Stebbens' barley Lolium multiflorum Annual ryegrass Poa pratensis Kentucky bluegrass 2 Representative Animals of the A. G. Spanos Planned Residential/Commercial Project and Vicin-ity, Brentwood, CA. Mammals, birds, reptiles, and amphibians identified either by direct observation or by other sign, March through June 1990. MAMMALS Common ?'lame ,Scientific Name California Ground Squirrel Spermophilus beecheyi Valley Pocket Gopher Thonomys bottae California Vole Microtus californicus Harvest Mouse Reithrodontomys megalotus White-footed Deer Mouse Peromyscus maniculatus House Mouse Mus musculus Ornate Shrew Sorex ornatus Striped Skunk Mephitis mephitis Aubudon's Cottontail Sylvilagus audubonii Black-tailed Jackrabbit Lepus californicus Coyote Canis latrans Cat (feral) Felis domesticus BIRDS Only common names are given for birds. The American Ornithological Convention has adopted standard names; consequently, scientific names are not necessary, Mallard Yellow-billed Magpie Killdeer Homed Lark Great Blue Heron Bank Swallow Great Egret Common Crow Turkey Vulture Scrub Jay American Kestrel Ash-throated Flycatcher Red-tailed Hawk Barn Swallow Black-shouldered Kite American Robin California Quail Savannah Sparrow Mourning Dove Song Sparrow Rock Dove Lark Sparrow Barn Owl Red-winged Blackbird Great-horned Owl Starling Burrowing Owl Brewer's Blackbird Acorn Woodpecker Western Meadowlark Red-shafted Flicker Bullock's Oriole Anna's Hummingbird House Finch Western Flycatcher House Sparrow Western Kingbird 3 ANMLLUBIANS AND REPTILES Bullfrog Rana catesbeiana Pacific Treefrog Hyla regilla Western Fence Lizard Sceloporus occidentalis, Gopher Snake Pitu`ophis melanoleucus 4 APPENDIX H-1 tt AIR QUALITY MODELS A. CALINE-4 MODELING The CALINE-4 model is a fourth-generation line source air quality model that is based on the Gaussian diffusion equation and employs a mixing zone concept to characterize pollutant dispersion over the roadway (California Department of Transportation, 1984). Given source strength, meteorology, site geometry, and site characteristics, the model predicts pollutant concentrations for receptors located within 150 meters of the roadway. The CALINE-4 model allows roadways to be broken into ,multiple links that can vary in traffic volume, emission rates, heighth, width, and other variables. The model's,intersection mode, which distributes emissions along each leg of the intersection for free-flow traffic, idling traffic, and accelerating and decelerating traffic, was employed. The intersection mode extended 250 meters in all directions. Receptors (locations where the model calculates concentrations) were located at a distance of 25 feet from the roadway edge for all four comers of the intersection. The worst case mode of the CALINE-4 model was employed. In this mode the wind direction is varied to determine which wind direction results in the highest concentration for each receptor. Emission factors were derived from the California Air Resources Board ENTFAC-7EP model. Adjustments were made for vehicle mix and hot start/cold start/hot stabilized percentages appropriate to each roadway. Temperature was assumed to be 40°F. The computation of carbon monoxide levels assumed the following worst-case meteorological conditions: Windspeed: I mps Stability: F Category Mixing Height: 1,000 meters Surface Roughness: 100 cm Standard Deviation of Wind Direction: 10 degrees The CALINE-4 model calculates the local contribution of nearby roads to the total concentration. The other contribution is the background level attributed to more distant traffic. The assumed 1-hour background levels were 4.4 PPM in 1991 and 3.1 PPM in 2005. These values were derived from published sources (BAAQMD, 1991). To generate estimates of 8-hour concentrations from the 1-hour CALINE results, a persistence factor of-0.7 was employed. B. URBEMIS-3 MODEL Estimates of regional emissions generated by project traffic were made using a program called URBEMIS-3. URBEMIS-3 estimates the emissions that would result from various land use development projects. Land use projects.can include residential uses such as single family dwelling units, apartments, and condominiums, and nonresidential uses such as shopping centers, office, buildings, and industrial parks. URBEMIS-3 contains default values for much of the information needed to calculate emissions. However, project-specific, user- supplied information can also be used when it is available. The following parameters were used in the regional air quality analysis of the proposed project: -Ambient Temperature: 60'E Trip Lengths., Home-Other: 5.3 miles Home-Mork: 9.6 miles Home-,Shop: 3.7 miles Non-Home Based Work: 8.6 miles Non-Home Based Ikon-Work: 5.6 miles -Year of Analysis: 2000 -Average Speed: 35 miles per hour for all trip types 2 APPENDIX 1-1 ACOUSTICAL TERMINOLOGY AMBIENT NOISE LEVEL: The composite of noise from all sources near and far. In this context, the ambient noise level . constitutes the normal or existing level of environmental noise a a given location. CNEL: Comunity Noise Equivalent Level . The average equivalent sound level during a 24-hour day, obtained after addition of approximately five decibels to sound levels in the evening from 7:00 p.m. to 10:00 p.m. and ten decibels to sound levels in the night before 7:00 a.m. and after 10:00 p.m. DECIBEL, dB: A unit for describing the amplitude of sound, equal to 20 times the logarithm to the base 10 of the ratio of the pressure, which is 20 micropascals (20 micronewtons per square meter) . Ldn: Day-Night Average Sound Level . The average equivalent sound level during a 24-hour day, obtained after addition of ten decibels to sound levels in the night after 10:00 p.m. and before 7:00 a.m. Leq: Equivalent Sound Level . The sound level containing the same total energy as a time varying signal over a given sample period. Leq is typically computed over 1, 8 and 24- hour sample periods . Note: CNEL and Ldn represent daily levels of noise exposure averaged on an annual basis, while Lq represents the average noise exposure for a shorter time period, typically one hour. The maximum sound level recorded during a noise event. Ln: The sound level exceeded "n" percent of the time during a sample interval . Lia equals the level exceeded 10 percent of the time (L.., L50) etc.) [BBA ACOUSTICAL TERMINOLOGY, NOISE EXPOSURE CONTOURS: Lines drawn about a noise source indicating constant levels of noise exposure. CNEL abd ' Ldn contours are frequently utilized to describe community exposure to noise. SEL OR SENEL: Sound Exposure Level or Single Event Noise Exposure Level . The level of noise accumulated during a single noise event, such as an aircraft overflight, with reference to a duration of one second. More specifically, it is the time-intgrated A-weighted squared sound level for a stated time interval or event, based on a reference pressure of 20 micropascals and a reference duration of one second. SOUND LEVEL: The sound pressure level in decibels as measured on a sound level meter using the A-weighting filter network. The A-weighting filter de-emphasizes the very low and very high frequency components of the sound in a manner similar to the response- of the human ear and gives goad correlation with subjective reactions to noise. BBA APPENDIX 1-2 FHWA HIGHWAY TRAFFIC NOISE PREDICTION MODEL INPUTS Day/-Night %n a % Distri- Medium Heavy Speed Distance Scenario/Roadway ADT bution Trucks Trucks (mph) (Feet) Existin East of.Minnesota Avenue 7,160 87113 2.5 1.5 50 75 West of Minnesota Avenue 6,584 87/13 2.5 1.5 50 75 .Existing plus Project i Balfour Road: East of Minnesota Avenue 16,090 87/13 2.5 1.5 40 75 Btw. Minnesota/Concord 15,260 87/13 2.5 1.5 1 54 75 West of Concord Avenue 10,210 87/13 2.5 1.5 50 75 Concord Avenue: 15,170 87/13 2.5 1.5 44 1 75 Cumulative without Delta Expressway Balfour Road: East of Minnesota Avenue 15,140 87/13 2.5 1.5 40 75 Btw. Minnesota/Concord 119,640 1 87/13 2.5 1.5 50 75 West of Concord Avenue 16,274 87/13 2.5 1.5 50 75 Concord Avenue: 116,590] 87/13 2.5 1.5 40 75 Cumulative with Delta Ex resswa Balfour Road: East of Minnesota Avenue 17,230 8.7/13 2.5 1.5 40 75 Btw. Minnesota/Concord 25110 87/13 2.5 1.5- 50 75 West of Concord Avenue 13,240 87/13 2.5 1.5 50 75 Concord Avenue: 17,480 87/13 2.5 1.5 40 75 APPENDIX U-I GOODYEAR`S SECOND REPORT (Taken from The coal mines of the Western Coast of the United States) Rancho Ike Los Meganos On going still further to the east from here, there is for some distance hardly any exposure of the rocks at the surface, and there have never been any hales sunk until we reach the south-east quarter of section 22, and the north-east quarter of section 27, upon the Rancho de Los Meganos, in township 1 north, range 2 east. Here there are known to exist at least three beds of coal of workable thickness associated :with heavy deposits of a good quality of fire-clay. A small shaft in the south part of section 22, known as the "Hoisting Shaft," and eighty-eight feet in depth, shows the following section of the strata, the measurements being vertical, and beginning at the top or mouth of the shaft: Feet Inches Clayand clayey material................................................................... 34 4 Blackclay.................................................. . ........................................ . 14 8 .................... ....................................................................... 2 4 Coil ............ . White clay, hard and somewhat sandy....................................... 4 8 Coal . , .... ............................................................................................. 0 4 Bluefire-clay......................................... ., ........................................ 5 0 Coal ............................ ............................................................................ 3 6 Clay (with three regular coal-seams, about one foot 8 a thickeach)........... .................................................I......................... Coal .......................................................................................................... 7 4 Clay............................ .......... ............................. , .............. .................. 3 4 Coal.......................................................................................................... 1 2 Clay........... ........ .................................................................................... 4 0 There has been mined here, chiefly from the "7 foot" and the "31/2 foot" beds, through shallow slopes and shafts, without the use of other power than that of hand and horse, an aggregate of probably somewhere between five thousand and ten thousand tons of coal, most of which has been used under the bailers at the "Engine Shaft." The general course of 'strike, of the beds here is about N. 720W. .magnetic, and their dip to the north-east, but so far as yet explored somewhat variable in amount, ranging from 160 to 260 at different points. The "Engine Shaft" is sunk at a point about eleven hundred feet north- easterly from the line of outcrop of the beds, is about three hundred and eighty feet deep, and is divided into three compartments, two hoisting and one pumping, each compartment being 8 ft. Y 5, ft. clear inside of timbers. The shaft is well timbered and is a good piece of workmanship. At its bottom there is, a seven-foot bed of coal upon which a gangway was driven west in 1868, to a distance of two hundred and seventy-five feet from the shaft. No gangway was ever driven east from the shaft, and the foot of the shaft itself is in a fault which appears to be an up-throw to the east, of considerable magnitude. Very little coal was ever mined from here, and what was taken out was burned under the boilers at the shaft. The quantity of water to handle here was pretty large, and the shaft was furnished with a Cornish pump, the pumping engine having a 22-inch cylinder with 48-inch stroke, and being geared 4 to 1. The hoisting engine has a 16" X 48".cyl1nder and is geared 3 to 1. It was but a few months after reaching the coal at the foot of this shaft, when, the company which owned the property getting into financial trouble, the work was suspended, and the shaft allowed to fill with water. Since that time it has been once again pumped out, and kept clear of water for a month or two, when, owing to similar causes, it was again allowed to refill. And in this condition it has remained up to the present time, the water standing about forty feet below the mouth of the shaft. It is believed by Mr. R. F. Lord, the engineer in charge of this property since 1871, as well as by Mr. Clarence King, mining geologist, who made a report upon it in 1874, to Mr. S. E. Lyon of New York, that the seven-foot bed at the foot of the engine shaft is entirely a different and separate bed from any of those upon which any mining has been done in the shallow workings near the outcrop, and that the latter beds, denominated by King the "Lord Series," underlie the former, the vertical thickness of the strata between the upper and lower seven- foot beds being supposed to be about one hundred and twenty-five feet. But while this theory is not a ,priori particularly improbable, it is yet far from being proven to be true, and it is based upon facts which, after a recent careful examination of the ground by myself, and with my experience of over nine years of intimate acquaintance with the coal mines of the Mt. Diablo region, i consider to be of very questionable import, and of little value. It would be nothing wonderful if this seven-foot bed at the foot of the engine shaft (whish bed consists, by the way, of three distinct benches of coal, separated from each other by two layers of clay-slate a few 2 inches each in thickness), should eventually turn out to be identical with, and at this depth the only representative..of, the whole series of beds which has been called the "Lord Series." 'But it is a question upon which the paucity and the doubtful significance of existing developments render speculation idle, and which additional underground explorations alone can finally settle. Whatever the fact may prove to be, however, in this respect, there can be no question in any case that the quantity of coal in the Rancho de Los Meganos is great. And, though 1 have never seen any coal in this property which was quite so hard or which would bear handling and transportation so well as the average of the Mt. Diablo coal, nevertheless, as it can be cheaply mined and cheaply sold, there is good reason to believe that it will pay to open up and work this mine, so soon as the property shall be freed from legal complications and a clean title shall be vested in some party who has both the money and the intelligence which it will certainly require to handle it properly. With the Rancho de Los Meganos, the Mt. Diablo coal field may be said to terminate, no explorations to the east or south-east of here having ever developed anything in the shape of coal worth mentioning until we come to another field, viz., 3 APPENDIX 1 r: AUTHORS OF EIR This Draft Environmental Impact Report was prepared for the City of Brentwood by: Michael Paoli and Associates Environmental, School Facility, and City Planning 600 West Shaw Avenue, Suite 240 Fresno, California 93704 (209) 224-4806 • Michael P. Paoli, Project Director • Scott B. Odell, Project Manager • Linda Dick Bissonnette, Cultural Resources Planner • Julie'p-. Hammonds, Planner • Laurie I. Akbar, Report Production Specialist The biological section was prepared by: William P. Jordan, Ph.D. and R. James Brown, Ph.D. University of San Francisco San Francisco, CA 94117 (415) 666-2352 The traffic and transportation section was prepared by: DK.S Associates 1956 Webster Street, Suite 300 Oakland, CA 94512 (415) 763-2061 The air quality section was prepared by: Don Ballanti, Certified Consulting Meteorologist 1424 Scott Street El Cerrito, CA 94530 (415) 234-6087 The noise section was prepared by: Brown-Buntin Associates, Inc. 319 W. School Avenue Visalia, CA 93291 (209) 627-4923 APPENDIX 2 SOURCES CONSULTED ALTERNATIVES Documentation Donaldson Associates, Draft E1R for Minnesota Avenue Annexation. 1990. Personal Communis tion Jackson, Mark, Assistant Planner, City of Brentwood. Letter and telephone communication. October and November 1991. AIR QUALITY Documentation Bay Area Air Quality Management District (BAAQMD). Bay Area '91 Clean Air Plan (CAP). Volume 1. October 1991. Bay Area Air Quality Management District. Air Quality and Urban Development-Guidelines. November 1985 (Revised April,1991). California Air Resources Board. California Air Quality Data Annual Summary. Vols, XX-XXII. 1988-1990. California Department of Transportation. CAL1NE-4--A Dispersion Model for Predicting Air Pollutant Concentrations Near Roadways. Report No. FH-WA/CA/TL-84-15. 1984. U. S. Environmental Protection Agency. Compilation of Air Pollutant Emission Factors, Volume 11: Mobile Sources. AP-42. Fourth Edition. 1985. AGRICULTURAL RESOURCES Documentation Agricultural Preserves, Contra Costa County (map) California, State of, Department of Conservation. Contra Costa County Important Farmland Map. July 1988. California, State of, Department of Conservation, Farmland Mapping and Monitoring Program, Important Farmland Map Categories. 1988. California, State of, Department of Conservation, Farmland Mapping and Monitoring Program. Soil Candidate Listing for Prime Farmland and Farmland of Statewide Importance in Contra Costa County, July 1991. Contra Costa, County of. Contra Costa County General Plan 1990-2005. January 1991. Contra Costa, County of, Department of Agriculture. 1990 Contra Costa County Agricultural Report, The Planning Center. City of Brentwood General P1anlE1R - Existing Condit ionslBaseline Data Report. March 1991. U. S. Department of Agriculture, Soil Conservation Service. Soil Survey of Contra Costa County. September 1977. Personal Communication Stout, Laurie, Agricultural Biologist, Contra Costa County, Department of Agriculture. Telephone communication. August 1991. Edwards, Doug; Fresno County, Department of Agriculture. Telephone communication. August 1991. BIOLOGICAL RESOURCES Documentation Barbour, M. G. and J. Major. Terrestrial Vegetation of California. New York: John Wiley and Son. 1977. Bolsinger, C. L. The Hardwoods of California's Timberlands, Woodlands and Savannas. Forest Service, U. S. Department of Agriculture. Resources Bulletin PNW-RB-148. 1988. Ingles, L. G. Mammals of the Pacific States. Stanford University Press. 1965, Jensen, C. San Joaquin Kit Fox Distribution. U. S. Fish and Wildlife Service, Bureau of Sport Fisheries and Wildlife, Sacramento, California. Special Report. 1972. 2 Laughrin, L. San Joaquin Kit Fox: Its Distribution and Abundance. California Department of Fish and Game. Wildlife Management Branch Administrative Report No, 70-2. 1970. Munn, P. A. A California Flora. Berkeley, California: University-of California Press. 1965. Munn, P. A. Supplement to A California Flora. Berkeley, California: University of California Press. 1968. Niehaus, T. F. and C. L. Ripper. A Field guide to Pacific States Wildflowers. Boston: Boughton Mifflin Company. 1976. Petersen, R. T. A Field Guide to the Western Birds. Boston: Houghton Mifflin Company, 1961.. Smith, J. P. (ed.). Inventory of Rare and Endangered Vascular Plants of California. Special Publication No. I (4th Edition). California Native Plant Society, Berkeley. 1988. Stebbins, R. C. A Field Guide to the Western Reptiles and Amphibians. Boston: Houghton Mifflin Company. 1966. Swick, C. D. Determination of San Joaquin Kit Fox Range in Contra Costa, Alameda, San Joaquin and Tulare Counties. California Department of Fish and Came. Project W-54-R-4. 1973, U. S. Fish and Wildlife Service. guidelines for Preparing Biota Reports, Attachment C. Loose leaf publication. 1988. U. S. Fish and Wildlife Service. Results of Surveys for San Joaquin Kit Fox Conducted in Southeastern Contra Costa County, 1978-1991. 1991. University of California Cooperative Extension. Living Among the Oaks: A Management Guide for Landowners. Berkeley. Undated Publication. WPM Planning Team, Inc. Vegetation and Wildlife Study for the Southwest Brentwood Specific Plan/EIR. 1988. Personal C91mmunication Lehman, B., U. S. Fish and Wildlife Service, Endangered Species Office. Personal. Communication. February and June 1990. Negano, C., U. S. Fish and Wildlife Service, Endangered Species Office. Personal Communication. June 1990. 3 CULTURAL RESOURCES Documentation Antioch Ledger. Antioch Centennial Ledger, 1851-1951. Antioch,'Califomia: Antioch Daily Ledger, Section of Vol. LXXXI, No. 130. 1951. Benham, Calhoun, Brief for John F. Williams on -a motion to dismiss the proceedings in bankruptcy, heard June 17, 1876 in the southern district court of New York. New York: Douglas Taylor Law Book and Job Printer. 1876, Brentwood, City of. Brentwood General Plan. City of Brentwood, Community Development Department. 1983. California Legislature, Appendix to the journals of the Senate and Assembly of the twenty-sixth session of the Legislature of the State of California, Volume IV, Sacramento: State Printing Office. 1885. California, State of, Department of Natural Resources, Division of Mines. California Journal of Mines and Geology. Mines and Mineral Resources of Contra Costa County, prepared by FenelonF. Davis and James W. Vernon. 1951. Califomia State Mining Bureau. Eighth annual report of the state mineralogist for the year ending October 1, 1888. Sacramento: State Printing Office. 1888. Contra Costa, County of, Contra Costa County General Plan, 1990-2005. Martinez: Contra Costa County Community Development Department. 1991. Daily Gazette. Thirteen thousand acres involved in suit filed: Rancho Los Meganos. Martinez: Daily Gazette. June 13, 1908. 1908. Emanuels, George. California's Contra Costa County: an illustrated history. Walnut Creek: Diablo Books. 1989. ENGEO, Incorporated. Report to A. G. Spanos Company, Stockton, California on the additional coal mine exploration for Brentwood golf course development, Brentwood, California. October 15, 1990. (N90-2832-H4). 1990. Francis, J. D. Coal mining—an outmoded Califomia industry. pp. 40-43. [excerpt from a book, circa 19371 (Department of Special Collection, Woodward Collection Pamphlet File, Henry Madden Library, California State University, Fresno). 4 ...................................................................... Goodyear, W. A. Detailed description of the Monte Diablo Coalfield, April 1870 in Qeological 5mey of Califomia- l m I Tht Qoast Ran ges ix. Cambridge, Mass.: John Wilson & Son, University Press, 1882. 1870. Goodyear, W. A. The Coal Mines of the Western Coast of the United States. San Francisco: A. L. Bancroft & Company. 1877. Griffin, A. R., B.A., Ph.D., M.B.I.M. Coalmining. London: Longman Group Limited. 1971. Hughes, David. Welsh People of California, 1849-1906. San Francisco: R. D. Reed, R & E Research Associates (reprint). 1969. Lord, R. F. Reports on the Rancho de Los Meganos and its coal field in Contra Costa County, California. New York: J. Polhemus. 1881. (cited in Napton 1990). Lyman, George D. John Marsh, Pioneer: The Life Story of a `rail-Blazer on Six Frontiers. New York: Charles Scribner's Sans. 1940. Macfarlane, James. Coal Regions of America. New York: Appleton. 1873. McBrien, J. P., Contra Costa County Administrator. National Register of Historic Places inventory---nomination form for the Jahn Marsh Home, Marsh Creek Road, Contra Costa County, California. Prepared for Historic American Building Survey No. 7-14, Ca. 1500; and Western Heritage, Inc. 1971. Napton, L. Kyle, Ph.D. Cultural Resource Investigation of the Proposed Brentwood Country Club EIR, 630 acres in Contra Costa County, California. March 1990. Prepared for Michael Paoli and Associates by California State University, Stanislaus Institute for Archaeological Research. 1990. National Park Service (NPS). History and Prehistory in the National Park System and the National Historic Landmarks Program. Washington, D. C.: History Division, National Park Service. 1987. Oakland Tribune. Eastbay Coal Mines Recall Early Era. Oakland: Oakland Tribune. Sunday, January 21, 1973. Praetzellis, Adrian. National .Register of Historic Places registration form for Black Diamond Mines (Regional Preserve), Somersville Road, Antioch. .Prepared by the Anthropological Studies Center, California State University, Sonoma. May 20, 1989. 5 Purcell, Mae Fisher. History of Contra Costa County. Berkeley: The Gillick Press. 1940. Slocum, W. A. History of Contra Costa County, California including its geography, geology, topography, climatography and description...San Francisco: W. A. Slocum & Co. 1882. Sullivan, Raymond and John Waters. History of Mount Diablo Coalfield, Contra Costa County, California. California Geology. March 1980. Whitney, J. D., State Geologist. Report of progress and synopsis of the field- work from 1860 to 1864 in Geological Survey of California, Geology, Volume 1. Sacramento: State Printing Office. 1865. Young, Otis E., Jr. Black Powder and Hand Steel. Miners and Machines on the Old Western Frontier. Norman: University of Oklahoma Press. 1975. Personal Communis tion Arrendondo, Dorothy, National Register Unit, California Office of Historic Preservation, Sacramento. Bonnickson, Barbara, Brentwood Historical Landmarks Committee. Hardwick, Bonnie, Bancroft Library Manuscripts Department. Jackson, Mark, Assistant Planner, City of Brentwood. Lamb, Sylvia Bender, California Division of Mines & Geology. Maffei, Betty, Contra Costa Historical Society. Napton, L. Kyle. Ph.D., California State University, Stanislaus Institute for Archaeological Research. Parent, Traci, Black Diamond Mines Regional Preserve. Pierce, Rose, East Contra Costa Historical Society. Pombo, Ernest, former property owner, Tracy. Praetzellis, Adrian, Senior Historical Archaeologist, Sonoma State. Stein, Louis, amateur historian, Berkeley. Waters, John, Black Diamond Mines Regional Preserve. 6 Rg42ositorries Visited, Black Diamond Mines Regional Preserve Museum, Antioch, California State Office of Historic Preservation, Sacramento, California State University, Fresno, Henry Fadden Library, including the Special Collections and Map ;Departments. Contra Costa County historical Society, Pleasant Hill. Contra Costa County Recorder's Office, Martinez. East Contra Costa Historical Society Byer Nail House Museum, Brentwood. ENERGY SUPPLY AND USAGE Document4ti&n The Planning Center. City of Brentwood General PlanlEIR - Existing Condit ionslBaseline Data Report. March 1991. .P!,-rsonal omrnunicadon Reid, Lisa, Planner, Pacific Lias and Electric Company. Telephone communication and letter. August-September 1991. Pitman, John, Cas Engineer, Pacific Cas and Electric Company. Telephone communication. November 1991. FIRE PROTECTION AND EMERGENCY SERVICES Doctirnentation The Planning Center. City of Brentwood General PlanlEIR - Existing ConditionslBaseline Data Report. March 1991. Person-al Communication Bolt, Dennis, Vice President, Regional Ambulance Company. Telephone communication. September 1991. Clary, John, Assistant Chief, Brentwood Fire Department. Telephone communication. August 1991. 7 Hine, Paul, Chief, Brentwood Fire Department. Telephone communication. September 1991. HAZARDOUS CONDITIONS Documentation California Public Utilities Commission, in cooperation with the California Department of Health Services. Potential Health Effects of Electric and Magnetic Fields from Electric Power Facilities. Report to the California State Legislature. September 1989. ENGEO. Level One Environmental Site Assessment of the Sciabica Property. March 1990. ENGEO. Level One Environmental Site Assessment of the Spanos Site. June 1989. Leonard, Alvin, Dr., et. a1. Electric and Magnetic Fields: Measurements and Possible Effects on Human .Health. Special Epidemiological Studies Program, California Department of Health Services. 1990. Morgan, Granger, Professor. Electric and Magnetic Fields from 60 Hertz Electric Power: What do we know about possible health risks? Department of Engineering and Public Policy. Carnegie .Mellon University. 1989. Per anal Comm nib to ion Berry, Marc, Associate Distribution Engineer, Pacific Gas and Electric Company. Telephone communication. September 1991. Billow, Pete, Gas Engineer, Pacific Gas and Electric Company, Telephone communication. September 1991. Simpson, Dale, Chairman of the Land Group, Pacific Gas and Electric Company. Telephone communication. October 1991. LAND USE Documentation Association of Bay Area Governments (ABAG). Projections '90. 1989. Association of Bay Area Governments (ABAG). Regional Plan 1980. 1980. 8 Brentwood, City of. Brentwood General Plan. City: of Brentwood, Community Development Department. 1983. Brentwood, City of. Project Status Report. June 1991. Centra Costa, County of. Contra Costa County General Plan .1990-2005. January 1991. The Planning Center. City of Brentwood General PlanlEIR - Existing ConditionslBaseline Data Report. March 1991. Personal Communication Jackson, Mark, Assistant Planner, City of Brentwood. Telephone communication. October and November 1991. Newhart, Laird, Land Planning Consultants. Telephone communication. December 1991. PARKS AND RECREATION DDocUme-ntation Brentwood, City of. Brentwood General Plan. City of Brentwood, Community Development Department. 1983. The Planning Center. City of Brentwood General PlanlEIR - Existing ConditionslBaseline Data Report. March 199 11. LAW ENFORCEMENT Documentation Brentwood, City of. Brentwood General Plan. City of Brentwood, Community Development Department. 1983. The Planning Center. City of Brentwood General PlanlEIR - Existing ConditionslBaseline Data Report. March 1991. Personal Communi ati+ n Frank, James A., Chief of Police, Brentwood Police Department. Telephone communication and letter. August and November, 1991. 9 SCHOOLS Documentation The Planning Center. City of Brentwood General PlanlEIR. - Existing Conditions/Baseline Data Report.. March 1991. Personal ommunication Adams, Doug, Superintendent, Brentwood Union School District. Telephone communication. August 22, 1991. Drake, Darlene, Executive Secretary to the Superintendent. Telephone communication. August 1991. Jackson, Mark, Assistant Planner, City of Brentwood. Telephone communication. January 1992. Newhart, Laird, Land Planning Consultants. Telephone communication and letter. February (in response to NOP on behalf of Liberty Union High and Brentwood Union School Districts), August, and November 1991. SOLID WASTE Documentation The Planning Center. City of Brentwood General PlanlEIR - Existing C'onditionslBasellne Data Report. March 1991. Personal Communication Brennan, Dave, Assistant City Manager, City of Brentwood. Telephone communication. August and September 1991. Garaventa, Sil, Vice President, Concord Disposal Service. Telephone communication. November 1991. Zahn, Charles, Assistant Director of Contra Costa County, Community Development Department. Telephone communication. August 1991. STORM DRAINAGE AND FLOOD CONTROL Documentation Contra Costa County Flood Control and Water Conservation District. Draft Environmental Impact Report for Marsh Creek Regional Drainage Plan. March 1990. 10 Contra Costa County Flood Control and Water Conservation District. Marsh Creek Watershed Hydrology Report, 1989. Personal Communication Kent, Ulf, Contra Costa County Flood Control. and Water Conservation District. Telephone communication. November 1991. Kersevan, Steve, Contra Costa County Flood Control and Water Conservation District. Telephone communication. November 1991. 'T'OPOGRAPHY, GEOLOGY, SOILS, AND SEISMIC HAZARDS ,D gumentation Anderson Geotechnical Consultants, Inc. Geologic Report on the General Plan Update of the-City of Brentwood. December 1990. Contra Costa, County of. Contra Costa County General Plan. Seismic Safety Element. 1986. ENGEO. Additional Coal Mine Exploration. October 1990. ENGEO. Additional Preliminary Geotechnical Exploration for Groundwater and Liquefaction Considerations, October 1990. ENGEO. Coal Mine Exploration Summary. February 1991. ENGEO. Environmental Assessment of the 57.68 Acre Sciabica Parcel. October 1990. ENGEO. Level One Environmental Site Assessment of the Sciabica Property, March 1990. ENGEO. .Level One Environmental Site Assessment of the Spanos Site. June 1989. ENGEO. Seismic Hazard Fault Study. December 1990. ENGEO. Seismic Hazard Fault Study. October 1990, McNutt, Stephen, California Department of Conservation, Division of Mines and Geology. Summary of Damage and Losses Caused by the Loma Prieta Earthquake. 1990. 11 ........................................... ........ .......... United States Department of Agriculture, Soil Conservation Service. Soil Survey of Contra Costa County. 1977. Wesnousky. Earthquakes, Quaternary Faults, and Seismic Hazard in California. Journal of Geophysical Research. Vol. 91, No. B12. TRAFFIC AND TRANSPORTATION Documentation Brentwood, City of. Capital Improvements Facility Plan EIR. Section 4.2. 1988. Contra Costa, County of. Contra Costa County General Plan, 1990-2005, draft, October 1990, and Draft Environmental Impact Report. Institute of Transportation Engineers. Trip Generation. 5th Edition. January 1991, Transportation Research Board. Special Report 209, Highway Capacity Manual. 1985. Transportation Research Board. Transportation Research Circular 212. 1980. Personal Communication Vosicka, Charles, Project Manager, City of Brentwood. Telephone communication. January 1992. WASTEWATER COLLECTION, TREATMENT, AND DISPOSAL Documentation Dewante and Stowall. City of Brentwood Ultimate Sanitary Master Plan. 1989. Nolte and Associates. City of Brentwood Infrastructure Master Plan Wastewater Treatment Final Report. March 1991. The Planning Center. City of Brentwood General PlanlEIR - Existing Co nditio nslBas e line Data Report. March 1991. PersonalCommunication Stedman, James, Stedman and Associates, Inc. Telephone communication. November 1991. 12 ................................................. .... ............................................. Vosicka, Charles, Project Manager, City of Brentwood. Telephone communication. January 1992. WATER SUPPLY Documentation Brentwood, City of. .graft City of Brentwood Water Supply Study. September 1994. The Planning Center. City of Brentwood General PlanlEIR - Existing Conditions/Baseline Data Report. March 1991. Personal Comm!�nication Stedman, .Tames, Stedman and Associates, Inc. Telephone communication. November 1991. Vosicka, Charles, Project, Manager, City of Brentwood. Telephone communication. January 1992. 13 Final Environmental Impact Report Brentwood Hills Country Club State Clearin;house Number 91013066 City of Brentwood EIR File No. 90-2 ' Prepared for: City of Brentwood 708 Third Street Brentwood, California 94513 (510) 634.6905 Prepared by: Michael Paoli and Associates Environmental, School Facility, and City Planning 600 West Shaw Avenue, Suite 240 Fresno, California 93704 In association with: Donald Ballanti Brown-Buntin Associates, Inc. DKS Associates William P. Jordan, Ph.D. and R. James Brown, Ph.D. May 1992 PREFACE This document, together with the draft EIR dated February 1992, constitute the final environmental impact report for the Brentwood Hills Country Club. The information presented in this document has been provided in accordance with the requirements of the California Environmental Quality Act (CEQA) Guidelines and includes the following: • Section A is the revised summary .for the EIR. • Section B presents a list of the agencies and individuals who received a copy of the draft EIR for review. • Section C contains the comments that were received from agencies and individuals on the draft EIR and the City of Brentwood's responses to the comments. • Section D contains corrections to the draft EIR. L Michael Paoli and Associates SECTIO`' B NOTIFICATION The agencies or individuals listed on the following pages were sent copies of the draft EIR for review. k f r t r i l S Michael Paoli and Associates B-1 ABMs Plan & pro. Re.Sect Brentwood Post Office CCC Flood & Water Dist. P.O. Box 2050 760 First Street 255 Glacier Drive Oakland, CA 94604 Brentwood, CA 94513 Martinez, CA 94553 (416) 464.7937 (416) 634.3148-M. Vilchez (415) 1346.4470-Bud Murphy County Health Officer East CC Irrigation Dist. Liberty Union High School 20 Allen Street 626 First Street 850 Second Street Martinez, CA 04663 Brentwood, CA 94513 Brentwood, CA 94513 (416) 374.8012 Chuck Hamilton (413) 634-3521-Phil White Pacific Gas & Electric Contra Costa Resource Con. Bey Area Alr Quality 840 Second Street 5562 Clayton Road 93f? EIIIS Street-Maint. Dept. Antioch, CA 94500 Concord, CA 94521 San Francisco, CA 94109 (415) 779-73413-Ms. Peterson (41S) 6822266 (415) 771-8000-Henry Hllten Brentwood Ree. & Park Dist. Brentwood Elem. School Dlst. CCC Planning Department 600 Chestnut Street 250 First Street 651 Pins Street Brentwood, CA 94513 Brentwood, CA 94513 Martinez CA 94553 (415) 1134-6141-James Frank (415) 6341168-WIlliam Bristow (415) 371.2026-H. Brogdon Brentwood Police Department CC Mosquito Abatement Dist. Pacific Bell 600 Chestnut FStrsst 155 Mason Circle 401 Lennon lane, Room tot Brentwood, CA 94513 Concord, CA 84520 Walnut Creek, CA 94595 Attention: Chief Frank Charles Beesley (416) 977.2027-Bili Betz Cal-Trans, District 04 Trl-Delta Transit East Diablo Fire District P.O. Box 7310 801 Wilbur Avenue P.O. Box 340 8.F., CA 94120.7310 Antioch, CA 94609 Brentwood, CA 94513 Attn: Don Stslger (415) 754.6622-Anne Drew (415) $34-3400-Paul Hein CIty of Antioch CC Water District City of Brentwood P.03. Box 130 1331 Concord Avenue Engineering Dept. Antioch, CA 94509 Concord, CA 94520 (415) 778-3481 Attention. Dennis Plalle LAFCO Oakley Water District Tslsvonts, Inc. 651 Pine Street 227 Main Street 101 Village Drive Martinez, CA 94653 Oakley, CA 94561 Brentwood, CA 94513 (416) 6464090•D.Msnsfleld Attention: Leonard Celonl (415) 634»3683-I3.McNey F Riverview Fire District MTC Dept of Fish & Game 1600 W. Fourth Street 101 8th Street 7329 Sllverado Trail Antioch, CA 94509 Oakland, CA 94607 Yountvllls, CA (416) 757-1303-Ken Lucido (415) 484.7820-Susan Pultz -r.«.... t litwets t!farrlrenhr,teew Brentwood Neale CCC Public Works 1400 10th Street P.O. Box 517 266 Glacier tar. Room 121 Brentwood, CA 94513 :. Martinez CA 94563 Sacramento, CA 95814 Attn: Dave Roberts SECTION C COMMENTS RECEIVED AND RESPONSES TO. COMMENTS This section consists of comments received on the draft FIR from the various interested agencies and individuals and the City of Brentwood's responses to the comments. For easy reference, a table of contents with the pace numbers for thij,. section is included below. Comment/Resuonse a¢e Contra Costa Resource Conservation District C- 2 Response C- 4 Contra Costa County Flood Control &. Water Conservation District C- 5 Response C- 7 Land Planning Consultants, Inc. (February 26, 1992) C- 8 Response C-10 Brentwood Union School District (March 10, 1992) C-1 I Response C-13 Land Planning Consultants, Inc. (March 18, 1992) C-14 Response C-15 Brentwood Union School District (March 19, 1992) C-16 i Response C-18 Michael W. Clark C-19 Response C-21 Contra Costa Mosquito Abatement District C-22 Response C-25 East Contra Costa Historical Society C-26 Response C-27 Brentwood Recreation and Park District C-28 Response C-29 I City of Brentwood Public Works Department C-30 Response C-32 California Department of Conservation C-34 Response C-36 Metropolitan Transportation Commission C-40 Response C-42 Joint Exercise of Powers Agency, State Route 4 Bypass Authority C-43 Response C-46 j Contra Costa County Community Development Department C-49 Response C-54 McCutchen, Doyle, Brown &Enersen (March 31, 1992) C-59 Response C-77 McCutchen, Doyle, Brown & Enersen (April 7, 1992) C-85 Response C-89 April 7, 1992 Planning Commission Hearing Comments C-91 Response C-92 Michael Paoli and Associates C-I Peter &Joann i,andraf Brentwood Assembly of God Kart &Gloria Bar: 3650 Morgan.Territory Rd, P.D. Box 665 400 Concord Ay,— Clayton, CA 94517 Brentwood, Ca 94513 Brentwood, CA 94513 Donald &Bobby Spiess 3annes & Carol Timms Michael&Joanna Clark 300 Concord Ave, 250 Concord Ave. 4704 Moorland Brentwood, CA 94513 Brentwood, CA 94513 Midland, Mt 48640 3 Ed & Starlene Austin Samuel &Gloria Sciabica Be6 Clark 2250 Balfour Rd. 1396 Madera Way 4006 Cowell Blvd. Brentwood, CA 94513 Millbrae, CA 94030 Davis, CA 95615 Joe Aguilar CalTrans Disc.4 425 Market St.,30th Floor San Francisco.CA 94105 f � Contra Costa Resource Conservation District 5552 Clayton Road - Concord, California 94521 -Phone (415) 672.6522 March 18, 1992 � 23S2 Mr. Mark .Jackson, Assistant Planner CC111MUN n x1v�0�,-00���� Planning Department City of Brentwood 708 Third Street Brentwood, California 94513 Subject: Draft Environmental Impact Report, Brentwood Hills Country Club, SCHn 91013066, City of Brentwood EIR File No. 90-2 Dear Mr. Jackson: The Contra Costa Resource Conservation District has reviewed the above Draft Environmental Impact Report and has the following comments. The two flood control darns located within this development site were constructed by the USDA Soil Conservation Service in 1963. At that time the system of flood control structures for the Marsh•Kellocg Watershed was designed to provide a 50-year level of protection for land under predominantly agricultural usage. Upon completion, responsibility for the maintenance of these structures was transferred to the CCC Flood Control and Water Conservation District. This proposed project will increase the area of impermeable surface and change the land use from agricul• Lural land to residential housing altering both the pattern of runoff and the necessary level of flood protea 2 tion. The developer of this project should work closely with the CCC Flood Control and Water Conserva- tion District to ensure adequate protection from peak storm discharges and to provide access for the maintenance of florid controlstrucrires. 3 Several corrections should be made in soil characteristics listed in Table E-I on page E-5 of the DEIR. The following table contains the necessary corrections: Symbol Soil Type Shrink/Swell Unified Depth Plasticity Liquid Potential Classification (inches) Index Limit KaC Kimball gravelly clay loam, CL, SC 2 to 9% slopes ,. Pb� Pescadero clay loam Moderate-High CL 0-43 I0-15 25-35 43-66 20-30 35-45 CONSERVATION • DEVELOPMENT - SELF-GOVERNMENT Planning Department March 18, 1992 Citv of Brentwood DEIR, Brentwood Hills Country Club _2_ Symbol Soil Type Shrink/Swell USCS Depth Plasticity Liquid Potential Classification (inches) Index Limit KaE Kimball gravelly clay loam, SC,CL 9 to 30 p slopes We appreciate the opportunity to review this Draft Environmental Impact Report. Please contact our office if we can be of further assistance. Sincerely, Thomas D. Brumleve President RESPONSES TO CONTRA COSTA RESOURCE CONSERVATION DISTRICT, THOMAS D. BRUMLEVE. LETTER DATED MARCH 18, 1992. Response 1 Informational comment on the flood control structures within the project site is noted. Response 2 The draft ETR states that increased storm runoff from the project area would result from the development of structures, roads, and parking areas which are impervious to water absorption (page J-2). Pursuant to Mitigation Measure 4 on page J-3, the developer will need to work closely with the Flood Control District and the City to be sure that appropriate drainage improvements are provided that ensure that the design capacities of the regional drainage improvements are not exceeded. The Flood Control District will retain its current ownership and easements in the flood control basin areas which will ensure its ability to access these facilities for maintenance. Response 3 The corrections in soil characteristics are noted and are included in the errata section of this final EIR. C-4 Michael Paoli and Associates �• =M" ''� Contra Costa County J. Michael warlord BLOOD CONTROL -- lx��t6i��it£� i - & eater Conservation District Milton F. Kubicek,c+tCuty chsef 255 Glacier Drive.Martine,,CA 9,455-3-4$97 Telephone:.{SFO;3t3=2000 March 16, 1992 FAX:(510)3'3-2333 Mark Jackson Assistant Planner City of Brentwood CtTy of 8Rh t°i°t DEPT 708 Third Streetuxt�t OEYtC Br en`Wood, CA 9451,E Five: 97-105 t Dear Mr. Jackson: We have reviewed the Draft Environmental Impact Report for the proposed A.G. Spanos Brentwood Hill Country Club project, which was received by our office on February 19, 1992, and submit the following comments. All stormwaters entering or originating within the subject property should be conveyed, -� (without diversion of the watershed), to the nearest natural watercourse or adequate man- ; made drainage facility. The proposed development is located within the Contra Costa County Flood Control District's Drainage Areas 105 and 106. The applicant should pay the adopted drainage fee for construction of regional drainage facilities. We also recommend that the City of Brentwood collect the additional drainage fee of$0.17 per square foot of impervious surface for construction of subregional drainage facilities. The developer needs to take into consideration both the flows from the primary and emergency spillways from Dry Creek and Deer Creek reservoirs. The developer should be advised to work directly with the Flood Control District to obtain the specific: design flows ' from these facilities. The District opposes the developers proposal to construct on-site detention facilities that are not part of the regional plan. The District could not assure that these facilities would not ' have a negative impact on the design capacities of the regional ' drainage basin improvements. Finally, the District would like a statement of support from the City of Brentwood indicating 5 that the proposed golf course facility to be constructed within the Dry Creek reservoir basin is in the best interest of the public and the City of Brentwood. Mark Jackson City of Brentwood 97-305 Page Two If you have any questions, please call me at 313-22$5. Very truly yours, Phillip Harrington Senior Civil Engineer i Flood Control Engineering PH:kd c:Jac971 o5.t3 cc: D. Bryan, City at Brentwood 97-106 r RESPONSES TO CONTRA COSTA COUNTY FLOOD CONTROL AND WATER CONSERVATION DISTRICT, PHU-LIP HARRINGTON. LETTER DATED MARCH 16, 1992. ` Response I Stormwaters entering or originating within the project site will be conveyed to the nearest natural watercourses and man-made drainage facilities. The southern portion of the site drains to the existing Dry Creek reservoir and the northern,` portion of the site drains into Deer Creek. In accordance with the tentative map drainage plan, this natural drainage pattern would be maintained in the drainage design of the project. +` Response 2 Mitigation Measure J,I,g has been added to this final EIR indicating that the Applicant will pay all required drainage improvement fees. i Response 3 Mitigation Measure J,I,h has been added to this final EIR providing that the design of drainage improvements for the project will take into consideration the flows from the primary and emergency spillways from Dry Creek and Deer Creek reservoirs in and that the District will be consulted to obtain necessary information. Response 4 The possible provision of on-site detention in the Deer Creek drainage area of the golf course and for the Concord Avenue area was proposed in order to avoid impacting downstream regional drainage facilities. Mitigation Measure 4 on page J-3 of the draft EIR allows for the provision of on-site detention facilities and/or other drainage improvements as determined to be necessary by the Flood Control District and/or the City to insure that the design capacities of the regional drainage improvements are not exceeded. Mitigation Measures J,I,c and J,l,d have been amended such that if on-site facilities are not desired, the Applicant will work with the District to provide other appropriate drainage improvements. Response 5 Since the project is under consideration by the City for approval, the City cannot make this statement at this time. However, if the project is approved, which includes portions of the golf course being constructed within the Dry Creel: reservoir basin, the City will find that the project is in the best interest of the public and the City of Brentwood. Michael Paoli and Associates C-7 ............................._.........................................................................................................................................._.................................................................................. Land Planning Consultant s INC. 239 AlAIN STREET, SUITE E X PLEASANTON, CA 99566, a (415}896-7007 ! F'AX:(415)846-531; February 26 , 2992 M9 8 1992 Mark Jackson, Assistant ?Manner city of Brentwood 708 Third Street Brentwood, CA 94513 Re: A.G. Spanos B,ientwood Hills` Country Club Dear Mark: In response to the Draft Environmental impact Report dated February, 1992 , we are providing our comments on behalf of Brentwood Union School District and Liberty Union High School District. The Draft Environmental Impact Report addresses most concerns of both school districts. However, we would like to emphasize those concerns and ask that the following changes and/or additions be incorporated as they relate to this project. The Brentwood Union School District recommends relocating the or000sed 10 'net acre school site west of the current location. The new location would place the school site at the intersection of two streets which would provide assurance that these streets would furnish access in a timely manner. The Brentwood Union and Liberty Union High School Districts have been working with the city and local, developers to formalize an acceptable financing agreement to assist in the funding of new 2 school facilities. To date the Brentwood agreement has been formalized but not fully executed. However, the Liberty agreement is still outstanding. The districts request that this project be conditioned to participate in the Brentwood Union and Liberty Union High School District's agreements. Lastly, we recommend rewording the cumulative impact and mitigation measures section to reflect the following.wording: New development would be required to pay school impact fees at rates in effect at the time of permit application. However, current experience with the fee ; system suggests that this }. source of funds would be insufficient, both in terms of the total amount of funding and the availability and timing of funds, as new facilities are needed. To help with this situation, the City should suppori school district efforts to Ser-r,;n_a Public ,4,r r;,r L 2NTWOOD UNION SCHOOL . .STRICT BRENTWOOD SCHOOL 2SO FIRST STREET GAAN SCHCOL x15163.:•3408 6AENTWO00,CALIFORNIA 94513 415,535-5252 4151634.1464 EONA HILL SCHOOL FAX:AISS34.8S33 RON MUNN SC`i0CL 4151634.3548 x1 516.0131 March 10 , 1992 _ Mark Jackson , Assistant Planner 1{� City of Brentwood1992 708 Third Street : Brentwood, CA 94513 CIrOFSRENTrrcoo CO b,&UI, OEV,;tOPMENT OZ?L RE: A.G. Spanos , DEIR Brentwood Hills Country Club Dear Mark: The District and our consultants recently met with Mr. Jim Panagopoulos of A.G. Spanos Company regarding concerns on the pro- posed elementary school site as illustrated on above referenced development proposal . Our concerns are essentially those that were raised in the DEIR for this project including access and cir- culation , grading, size of site , and possible toxic contamination . Mr. Panagopoulos assured the district that A .G. Spanos Company would mitigate these concerns to our satisfaction. In that regard the school district would find the elementary school site accent- able provided A .G. Spanos were to meet the following conditions : 1 . Site Access and Circulation: The proposed site has literally no access through A.G. Spanos property other than a stubbed street. All other streets . illustrated are shown half on the school site and half on two adjacent properties not controlled by A.G. Spanos or a part of this development proposal . To our knowledge neither of these properties are proposing any development plans to the city; The state recommends that a school site have at least two access points . For this site to be approved by the district, the district would need assurance that the other half of these two streets be built by someone other than the school district in a timely manner with the construction of the school facility. Otherwise this site would not be acceptable . We request that you condition the approval of this development in a manner that assures the district of the construction of these roadways . 2 . Site Size: The School District requires ten net acres for an elemen,ary school . A portion of this requirement could be jointly used with a park district if the land configuration and park district needs were consistent with the school districts planning for the school facility . We request that you condition the approval of this development to provide a ten net acre usable school site. 3 . Site Grading : The proposed site is presently a. hill ranging in elevation of 140 to 1803 feet . The state will not support excessive costs to modify a school site if other sites exist that would not require such expenditures. Therefore, we ask that the site be graded to the requirements of the district' s architect to make the property usable for a school site . 4 . Toxic: As in all properties under consideration, there exists the possibility of soil toxics . We ask that the developer be responsible for determining the existence of toxics on the property and if removal is recommended that they be respon- sible for that as well . These requests are consistent with as related to Mr. Panagopoulos when he first proposed this project to the district board over a year ago. The site as it is proposed without these conditions of approval would be unacceptable to the district for the reasons listed above . If the development approval lists the above re- quested conditions of approval , the site would be acceptable . Thank you for your consideration on this matter . If you have any questions regarding this information, please give me a call or Mr. Laird Neuhart, district consultant, at 846-7007 . Sincerely, J. Douglas Adams Superintendent cc : Laird Neuhart -- District Consultant Jim Panagopoulos - A.G. Spanos t RESPONSE TO BRENTWOOD UNION SCHOOL DISTRICT, J. DOUGLAS ADAMS. LETTER DATED MARCH 10, 1992. This Ietter expresses the Brentwood Union School District's concerns regarding site access and circulation, site size, site grading, and toxic materials and states that the school site shown on the project development plan would be acceptable to the District under certain conditions. The conditions requested by the District have been added as mitigation measures to Impact C,5 in the summary section of this final EIR (replacing the mitigation measure in the draft EIR) and will be made . conditions of tentative map approval. The new mitigation measures are as- follows. 5 (a) The Applicant shall provide two points of public street access to the school site prior to the start of school construction. The access shall be provided by fully developed public streets identified as 27 Street and 28 Street on the tentative subdivision map. 5 (b) The Applicant shall grade the school site to the requirement of the District's architect prior to the start of school construction. 5 (c) The Applicant shall provide all testing and studies for toxic materials affecting the school site as needed to satisfy the requirements of the District and the State of Califomia, and for the removal of any toxic materials in accordance with the District and state requirements. If the District or state determine that the existence of any toxic materials cannot be remediated to an acceptable level, the Applicant shall provide within the project site an alternative location for the school acceptable to the District. 5 (d) If the Applicant does not comply with one or more of the above conditions, the Applicant shall provide within the project site an altemative location for the school acceptable to the District. The District's requirement for a 10-net-acre school site is provided for by Mitigation Measure Q,1,a. Michael Paoli and Associates C-13 Land 1 tannin Consulcants INC. 239 TWAIN STREET, SUITE E K PLEASr1NT0N Cry 94366, IN (915)846-7007 a Fri X:(915)x"45-531; March 18 , 1992 CITY OF BRENTWOOD CO.MMUNM DEVELOPMENT DEFT Mark Jackson Assistant Planner Planning Department City of Brentwood 708 Third Street Brentwood, CA 94513 Re: A.G. Spanos Brentwood Hills Country Club Dear.Mark: This. letter is in response to our recent telephone conversation regarding the above referenced project. The Brentwood Union School District recommends relocating the proposed 10 net acre school site west of the current location as indicated in the Environmental Impact Report proposal . The new location would place the school site at the intersection of two streets entirely within the proposed development boundary. This would provide assurance that these streets would furnish access to the school in a timely manner. If you have any questions, please contact our office. Sincerely, "ir-- Laird Neuhart District Consultant cc! Doug Adams - Brentwood Union School District Phil White - Liberty Union High School District Serving Public Agencies RESPONSE TO LAND PLANNING CONSULTANTS, INC., LAIRD NEUHART (ON BEHALF OF THE BRENTWOOD UNION SCHOOI! o DISTRICT). LETTER DATED MARCH 18, 1992. This comment reflects the recommendation of the draft EIR to shift the location of the school site to the west to the northeast corner of 4 Drive and 28 Street or another appropriate location within the project site. It is the City's understanding that the District will accept the site as shown on the tentative subdivision map subject to the conditions listed in the response to the District's letter of- March 10, 1992. Michael Paoli and Associates C-15 BRENTWOOD MINION SCHOOL DISTRICT SRENTWOO�J SCHOOL 253 FIRST STREET GARIN SCHOOL 4151634.34 8 SRENTWOOD.CALIFORNIA 94513 415.'634.5252 4151634-1168 EdNA HILL SCHOOL FAX.4 1 51634-8583 RON NUNN SCHOOL 415t516.41 1 1151634.3548 March 19, 1992 W2 E 3 t992] Mark Jackson, Assistant planner CITY QF6RENT .— City of Brentwood t-Kvtul1NI1YDEYEIOPMENTDEPT. 708 Third Street Brentwood, CA 945i3 RE: A. G. spanos , DEiR Brentwood Hills Country Club Dear Mark: Jin Panagopoulos of A .G. Spanos Co . has asked me to consider re- vising two sections of my letter sent to you dated March 10 , 1992 . Specifically , he has asked me to make the following changes : "The proposed site is presently a hill ranging in elevation of 140 to 180 .feet . " ( Section 3 of the letter) Change to: "The proposed site is presently rolling terrain and would require grading . " He asked that 1 delete the following sentence ' in Section 4 : "The site as it is proposed without these conditions of approval would be unacceptable to the district for the reasons listed above . " . He has asked me to add to Section 4 in the place of this deleted sentence : "Additionally, the Department of Education, School Facilities Plan Division have reviewed the proposed ten acre elementary school site and' have found it to be an acceptable site. " --..I -responded to Jim with the following comments : First request: Jim would like reference to the elevation deleted. we used the information from the E1R for the elevation reference. Z agree that the terrain is rolling and requires grading . Second request : The site as proposed is unacceptable without the proposed conditions and should he so noted in the letter . Third request : The Department of Education , School Plan Division has reviewed the site and found it to be accept- able provided the proposed conditions are met . Thank you for your interest in helping us to locate a suitable site for the school district . We appreciate all the work you have done on our behalf . Tease contact me if you have additional questions. Sincerely, /t A J . Douglas Adams Superintendent cc : Jim Panagopoulos Laird Neuhart i RESPONSE TO BRENTWOOD UNION SCHOOL DISTRICT, J. DOUGLAS ADAMS. LETTER DATED MARCH I9, I992. This Ietter responded to a request by the Applicant to chane portions of the District's letter of March 10, 1992. The content of this letter dues not affect the EIR or the conditions requested by the District in its March 10, 1992 letter, which have been included in this final EIR as mitigation measures. C-18 Michael Paoli and Associates FEB 271992 4704 Moorland CITY Of$RENT'NO0O COMMUNITY DEVELOPMENT DEPT. Midland. MI 48640 February 24. 1992 Mr. Mark Jackson, Assistant Planner Planning Department City of Brentwood 708 Third Street Brentwood, CA 94513 Dear Mr. Jackson: I appreciate your recent letter (1/27/92) and the copy of the draft Environmental Impact Report on the Brentwood Hills Country Club (BHCC): both documents help me to more clearly understand the developments under way which will impact my property. As I read the EIR, it seems to strongly support the arguments that I put forth in my earlier correspondence with Mr. Rowland, namely: 1. The need for the park is generated by the BHCC development: see page R-3. 'The Spanos property by itself, with a proposed 1,051 residential units and a j population of 3,212, would need 9.6 acres of park land to meet the General Plan standard...Only 1.6 of those acres, however, are on the Spanos property." 2. There are better alternatives for park land on the Spanos property: see pages U-11/12, "Planning a park or open space to incorporate the site, with fencing around the coal mine site...is consistent with the City and County General Plan goals and policies to preserve areas of historic value...The mining area could be Incorporated as part of a park site which could extend west to the top of the knoll 2 ]s preserve a rilim bcr of larg: oak In fact, the EIR strongly recommends this action! See Table A-2, Mitigation Measures (page A-15, 1. (e)): 'The area on top of the knoll in the southeast portion of the site (P Court and adjacent single family lots as shown on the project land use plan) shalt be preserved as open space or a public park. The park could extend to the east to encompass the old mine site and intervening open space (see mitigation measures in Section U, Cultural Resources). This measure would preserve nine additional oak trees." Also see page V-10. which also recommends this in conjunction with my recommendation to zone my land SF-5000 (Component 2 of the modifications requested by the Planning Commission): "Implementation of the mitigation 3 measure specified in Sections F and U of providing a park site on the southeast knoll area of the project site (to preserve oak trees and the mine site), however, would allow the park acreage standard to be substantially met." Finally, it even appears that there are strong advantages to placing the school site Inside the Spanos development(see pages C-9. 10, 11.whirh detail the 4 disadvantages of siting the school near Concord Avenue). i Mr. Mark Jackson February 24, 1992 Page Two (2) In summary, since the EIR gives recommendations that there is a more appropriate park site on the Spanos property (!Torn both a historical and ecological perspective). I would again strongly request that my property be zoned SF-5000. This would mean that the BHCC development would fulfill tlhe need for park space Itself rather than unfairly rj taking my property at both a price and timing over which I would have Kittle or no control. Mr. Jackson, I would appreciate your forwarding these arguments to both the members of the Planning Commission and the City Council as well as LAFCO-, or if I must do this, could you please send me the names, addresses, and facsimile numbers of these people so I can correspond directly. Thanks for your help: I hope and trust we can resolve this situation so that I am left with some viable alternatives for my land as we approach retirement. Yours truly. Michael W. Clark RESPONSES TO MICHAEL W. CLARK. LETTER DATED FEBRUARY 24, 1992. Response 1 Comment reflecting information in the EIR on the amount of parkland needed to serve the Spanos portion of the project site is noted. Response 2 This comment reflects the recommendation of the draft EIR to preserve the coal mine structure site and the adjacent top of the knoll as a park. Response 3 The comment refers to the alternatives section of the draft EIR, which indicates that if Mr. Clark's property were to be zoned SF-5000 and the southeast knoll/mine site area were to be preserved as a park, the park acreage standard would be substantially met. However, less park acreage would be provided on the project site under this alternative because the Clark property, at about 11 acres, is larger than the southeast knoll/mine site area, which would be 7-8 acres. Response 4 The school site, as shown on the project land use plan, is within the Spanos-owned portion of the project site. The recommendation of the draft EIR is to move the school site further west on the Spanos property or elsewhere within the project site. Response 5 The EIR does not make comparative judgments as to whether areas on the Spanos- owned portion of the project site are more appropriate for a park designation in lieu of Mr. Clark's property. The EIR does provide that if the park site designated on the project land use map cannot be purchased prior to the commencement of Phase 2 of the project, the Applicant shall provide other appropriately situated land for park development. This ensures that the project cannot be substantially developed without the provision of an adequate amount of park acreage. Michael Paoli and Associates C-21 CONTRA COSTA DC7ARDOFTRUSTEES MOSQUITO ABATEMENT DISTRICT ADMINISTWIc PRESIDENT 155 MASON CIRCLE MANAGER Ronald wheeler, Ph.D. C©NCORO. CA 94,920 Charles Deesley. Ph.D Mortlnez (5101 685-3301 VICE PRESIDENT (600) 331-8321 Devid Jameson, Ph.D. FAX: 685.0266 Danville SECRETARY Freda £ricksen March 2 0, 1992 U Pleasant Hill ��•yy�yy�) ANTIOCH E'1rY1 �:+�C Charles T. Mazzel Mr. Mark Jackson CIi`t OF BRENTWOOD ORENTwOOO Assistant Planner COMMUNITY DEVECORI.iENT DEPT. Vacant Planning Department CLAYTON City of Brentwood John Hanley 708 Third Street CONCORD Brentwood, CA 94513 Earl Mortenson SUBJECT: DRAFT ENVIRONMENTAL IMPACT REPORT BRENTWOOD HILLS CONTRA COSTA CO. COUNTRY CLUB Patricia Della Jim P.nckney William Ross Dear Mr. Jackson: £L CERRlTO Dr. Sedgwick Mead We have reviewed the Draft Environmental Impact Report for HERCULES Brentwood Hills Country Club and we at Centra Costa Mosquito DeRNnon Kafka Abatement District (CCMAD) would like to express some concerns. Some of the following comments are similar as these LAFAYZ E for the Fairway Palms/Hancock Annex however, others address Manly"milby different problems. MORAGA Vacant Whenever golf courses and parks are created, there are going ORINDA to be water detention basins and passible uses of reclamation Charles Lupsho water within the boundaries of these areas. These detention PINCLbasins in the project area can cause problems with Culex and Vacant Culiseta mos uitoes and can lead to mos p year Vacant q mosquito problems round. In addition, Culex tarsalis is a potential vector of PITMURG western Equine Encephalitis and St. Louis Encephalitis. Robert Hussey RICHMOND Any time residential developments are created in previously Vacant unoccupied areas you create problems with urban runoff. The SAN PAOLO development of a previous grazing area will increase the Vacant monitoring required to avoid the emergence of large numbers of Aedes mosquitoes. In addition, storm drains . clogged with SAN RAMC>N vacant debris can form pools of water which can lead to Culex pipien WALNmosquitoes within two weeks time. Ultimately, construction of NonCy oncy3T CREEK D(awnfield homes will Create new potential back yard mosquito breeding areas, such as containers and ornamental ponds. This will in turn increase the level of service required from tCMAD. Comments to Draft Environmental impact Report: j` 1) Section A. S'U'MMARY: Pg. A--3 describes Public 2 Facilities and Services in the project area. CCMAD is not even mentioned on this list. 2) Section B. PROJECT LOCATION AND DESCRIPTION: Table B-1 on Pg. B-10 makes no mention of CCMAD and the fact that this project will result in a dramatic increase in the level of services we will provide in the project area.' = 3) Section J. STORM DRAINAGE: Whenever new residential developments are created you can experience increased problems with urban runoff in local catch basins and creek-beds . These areas can produce mosquitoes in as little as two weeks . 4) Section 0 - R. PUBLIC SERVICES : The draft EIR fails to acknowledge the impact on 'services that will be required from CCMAD because of new development. The construction of 1,-202 new residences as well as a golf course with water detention basins will lead to a significant increase in the level of service required from CC. AD. 5) Not Listed. HUMAN HEALTH: Nowhere in the Draft E. I.R. is the area of public health addressed. The increase in population in the project area can have a significant impact on Human Health, as the likelihood of being exposed to those mosquitoes that can transmit encephalitis will increase. (as explained previously) . Recommendations: 1) If private recreation areas are created with detention ponds and lakes, the water should be as deep as possible with steep sides to minimize mosquito production. The water level ' should be kept as constant as possible to avoid production of floodwater, Aedes, mosquitoes. Whenever possible, emergent vegetation should be minimized, as this provides a protective and nutritive habitat for immature mosquitoes. 2) Construction of, as well as changes to, existing catch basins and flood control - channels should be completed with attention to the fact that even small pools of standing water can quickly become breeding grounds for mosquitoes. Channels and basins should be as deep as possible and have steep sides to minimize mosquito production. CCMAD should be consulted regarding any improvements to these existing drainage ditches or the creation of new ones. 3) if water reclamation alternatives are considered' for recreation areas within the project boundaries, Contra Costa Mosquito Abatement District should be consulted in the design of alternative methods and disbursement sources. Therefore, we at Contra Costa Mosquito Abatement District feel .that the public services we will be required to supply to the project area warrant acknowledgement in the appropriate areas mentioned above. In addition, the preceding areas of storm drainage;, public S service and public health should be addressed in the Environmental Impact Report. in closing, this office has the expertise, and should be consulted, regarding moscruito contrbl in the project area. Please call our office should you have any comments or questions. Sincerely, Ray Wa etz o �- Administrative Assistant CC: Brentwood Hills File RW r RESPONSES TO CONTRA COSTA MOSQUITO ABATEMENT DISTRICT, RAY WALETZKO. LETTER DATED MARCH 20, 1992. Response 1 Comments regarding the potential for mosquito problems to develop as a result of the project and the need to increase the level of service provided by the District are noted. Response 2 CCM-AD is included in Table A-1 in this final EIR. Response 3 CCMAD should have been included in Table B-1 on page B-10 of the draft EIR. This is noted in the errata section of this final EIR. Response 4 Comments regarding the potential mosquito problems related to urban runoff in local catch basins and creek beds, the need for increased mosquito abatement services, and the potential impact to human health due to mosquitoes that can transmit encephalitis, are noted. There is a potential for some increase in local mosquitoes; however, this is not considered to be a significant environmental impact. As a result of these comments, a new impact related to mosquito abatement has been added to the summary section of this final EIR under storm drainage (Impact J,5). Response 5 These recommendations have been added in the summary section of this final EIR as mitigation measures to Impact J,5. Response 6 Comment noted and addressed by previous responses. Michael Paoli and Associates C-25 Wast (�urtfra usfaptsfuriral C~ P.O. Box 2Cr2 BRENTWOOD, CAIJFol3NIA 9451.3 April 1 , 1992 Mr. Marl: Jackson, Assistant Planner APR 2 �- 1992 City of Brentwood 700 Third Street CITY OF 8kEE"Q0D Brentwood, CA 94513 couMUM Y oEVELOOPkiENT DEPT. Re: A. G. Spanos Draft EIR Brentwood Hills Country Club tear Mark: In response to the Draft Environmental Impact Report, dated Fetrruary 199.^-_, the East Contra Costa Historical Soni ety submits the fol 1 ow-i ng comments regarding the remains of the Brentwood coal mine on the project site. Representitives from the East Contra Costa Historical Society have been given permission by the property owners to visit the site and remove any artifacts it wished for its Museum. Six members of the museum exhibit committee visited the site late in 1991 . took pictures, gathered a few artifacts and established an exhibit on the Brenta-Mood Coal Mine in our museum. We wish to thank. the property owners for making this opportunity available to us. The Brentwood Coal Mine is important to the history of the Brentwood area as being one of the first industries in the area and directly responsible for the establishment of the town of Brentwood. The town took its name from the mine. Many of the old homes and other buildings in Brentwood were moved into town from the Brentwood Coal Mine. Our Society' s Board of Directors meet last night to discuss the A.C. Spanos Draft EIR. We agree with the conclusions of the report and have no plans for the site. Should you have any questions, please contact me. I may be reached anytime at 625--4290. Sincerely, / f - Carolyn L. Sher+y, President RESPONSES TO EAST CONTRA COSTA HISTORICAL SOCIETY, CAROLYN L. SHERFY. LETTER DATED APRIL 1, 1992. a Response 1 Comment regarding visitation of the site and collection of artifacts (with the permission of the property owner) is noted. Response 2 Comment regarding the importance of the mine to the history of the Brentwood area and its role in the establishment of the town of Brentwood is noted. This type of information was presented in Section U of the draft EIR. Response 3 This comment indicates that the East Contra Costa Historical Society is in agreement with the conclusions of the draft EIR but has no plans for the site. 1 Michael Paoli and Associates C-27 RECREATION AND PARK DISTRICT March 30 , 1952 MAR 301992 Mark Jackson, Assistant Planner CITY OF BRENTWOOD Planning Department COMMUNITY DEVELOPMENT DEPT. City of Brentwood 708 Third Street Brentwood CA 94513 Subject : Draft Environmental Impact Report Brentwood Hills Country Club Dear Mr. Jackson . The Brentwood Recreation & Park District would like to make the following comments regarding the Brentwood Hills Country Club Environmental Impact Draft' Reporto 1 . Wage R-1, Paragraph 6 , the City of Brentwood owns all parks within City Boundaries except Brentwood City Park, located at -� Dainty and Oak Street , which is owned and maintained by The Brentwood Recreation and Park District through county property taxes and augmentation funds . 2. The BR&PD cannot comment on the 16.7 acre park site at this time, however we are very interested in participating in it 's development . We hereby request that all current information related to the development of this park be forwarded to us as soon as possible as well as all future plans relating to this park site as they become available. If you should have any questions regarding this letter, feel free to contact me at (510) 634-1044. Sincerely, Linda L. Cawthorn Office Manager cc: Chief James Prank, City Liaison Officer Gilbert Dominguez , President BR&PD Board of Directors :Kim Vogley, Vice-President 91 " ` Gayle Servin, Board Member it Elgin Martin, t' It Robbie Myers , it to " 740 B Third Street • Brentwood, California 94513 • (415) 634-1044 RESPONSES TO BRENTWOOD RECREATION AND PARK DISTRICT, LINDA L. CAWTHORN. LETTER DATED MARCH 34, 1992. a Response 1 The correction to Page R-1, Paragraph b of the draft EIR is noted. The correction will be reflected in the errata section of this final EIR. Response 2 J'.; Consistent with current practice, the City will coordinate with the District in the planning and development of any parkland within the project site. i Michael Paoli and Associates C-29 M- EMORAND UM DATE: March 31, 1992 TO: Mark Jackson KAR 3 1 1592 00 FROM: Chuck Vosicka UNI rY a vftopMEN couMu�� tftt DEFT SUBJECT: Draft EIR for A. G. Spanos Brentwood Hills Country Club We have reviewed the draft report and offer the following comments for consideration: 1. As a mitigation, no structures are to be built in areas with less than 100 feet of cover over the suspected mined-out areas in the vicinity of the coal mine. No definition is given as to where these areas are, or to how they are to be located. The club house is specifically identified as being in such an area, and the .report calls for "a detailed engineering analysis of soil and subsurface conditions" to be conducted. This analysis needs to be completed to the satisfaction of the City Engineer prior to approval of the final map. 2. The report correctly identifies that two water storage tanks (at two different elevations) will be necessary to provide water service for the project. .However, 2 the report is .not clear as to how they will be built. The CIFP currently under consideration will construct only one tank. Unless the improvements to be constructed by the CIFP are expanded to include the second water tank, the other tank will therefore need to be the responsibility of the developer. 3. Any agreement for irrigation water for the golf course (and roadside landscaping?) with the East Contra Costa Irrigation District will need to meet with the approval 3 of the City. 4. This project needs to be responsible for any shortage in funding for maintenance of facilities that are constructed by it. The report points out that there will 4 probably be shortage, but is relying on the City's General flan update to quantify that shortfall. This detailed information should be presented in this report so that the project's impacts are fully defined. 5 5. All cul-de-sacs need to meet City standards. Memo to Mark Jackson March 31, 1992 Page 2 6. The mitigation measure on page H_g limiting the speed of construction vehicles to 15 miles per hour is unrealistic and unenforceable. 7. Any rerouting of the PG&E/Stanpac and Chevron pipelines alongside public streets 7 or crossing them, will require a special design to avoid conflicts with City utility lines within those streets. The City Engineer shall approve any such design. i 1 RESPONSES TO CITY OF BRENTWOOD PUBLIC WORKS DEPARTMENT, CHUCK VOSICKA. MEMORANDUM DATED MARCH 31, 1992. Response 1 The location of the mining area is shown on Figure E-4 of the draft EIR. According to ENGEO, Inc., no residential lots, as depicted in the tentative subdivision map, are located in an area having less that 104 feet of cover over the mining areas. Regarding the Country Club building, Mitigation Measure E,6,b in the summary has been changed to require that the detailed engineering analysis be completed to the satisfaction of the City Engineer prior to approval of the final subdivision map. Response 2 Mitigation Measure K,1,a has been modified to reflect that only one water storage reservoir will be provided by the CIFP and a new Mitigation Measure K,1,b has been added indicating that unless the CIFP is modified to include the construction of a second reservoir, the second reservoir would be the responsibility of the Applicant. Response 3 Mitigation Measure K,1,b in the draft EIR (which is now K,l,c in the final EIR due to the addition under Response 2, above), has been modified to add that any agreement with,ECCID will need to be approved by the City. Response 4 Detailed fiscal analysis of the proposed project is outside the scope of work of the EIR. Based upon the concerns of the Public Works Department during its review of the administrative draft EIR, an impact was added to the draft EIR regarding increased operation and maintenance costs for public improvements needed to serve new development which might not be offset by revenues for new development. Rather than singling out one development and without a substantiating fiscal analysis, the approach taken was to require a comprehensive ari`alysis to be conducted as part of the General Plan update process whereby if there was in fact a revenue shortfall from new development, the City could consider establishing a fee structure to cover these costs. Response 5 Mitigation Measure G,2 has been changed to require that the cul-de-sacs meet City -standards rather than "shortened to be closer to" City standards. C-32 Michael Paoli and Associates Response 6 This mitigation measure has been eliminated in the summary section of the final EIR. Response 7 The text of this comment has been added to Mitigation Measure N,4,a. i i Michael Pauli and Associates C-33 'alifornia THE RESOURCES AGENCY OF CALIFORNIA e m o r a n d u m _. To Mr. Douglas P. Wheeler H�,��,j Date March 23 , 1992 Secretary for Resources j subject.. Draft Environmental Mr. Mark Jackson rf 4r� Impact Report (DEIR) City of Brentwood the Brentwood 708 Third Street Hills Country Club Brentwood, CA 94513 BCH #91013066 From Department of Conservation--Office of the Director The Department of Conservation, which is responsible for monitoring farmland conversion on a statewide basis has reviewed the City of Brentwood's Draft Environmental Impact Report (DEIR) for the project referenced above. The project proposes taking the necessary steps to convert approximately 750 acres, 600 of which is covered under Williamson Act contracts, to residential development. The land is currently being used for grazing and a walnut orchard and is adjacent to additional contracted land. The Draft ETR does mention the need for certain findings to be made in order for a Williamson Act contract to be canceled and cites the farmland conversion as being a significant unavoidable impact. However, the Department is concerned about the impacts of this project on the adjacent agricultural land to the south -� and northeast of the project site. Since development of this project removes 7507 acres of land from agricultural production and could have environmental impacts on adjacent agricultural land under Williamson Act contracts, the Department recommends that additional analysis of the impacts on agricultural and Williamson Act lands be undertaken to identify passible mitigation measures. The Department also recommends that an evaluation of the agricultural character of the project site and an assessment of the types and relative yields of crops grown in the affected areas, or in areas of similar soils under good agricultural management be included in the Final Environmental Impact Report (FEIR) . In addition, an investigation into the agricultural potential of the area's soils, as defined by the Department of Conservation's Important Farmland Designations should be included. The FEIR should address the farmland conversion impacts such as *the type, amount and location of farmland conversion that could result from development of the project. Also, the 3 cumulative and growth-inducing impacts on farmland in the surrounding area and adjacent Williamson Act lands should be assessed along with a discussion of the likelihood of these lands becoming urbanized as a result of the project. Mr. F nee.Ler aii" rid. aJd4:h iJi1 March 23 , 1392 Page Two Some possible mitigation measures which would lessen the farmland conversion impacts include: - Increasing densities or clustering residential units to allow a greater portion of the area to remain in agricultural production. - Protecting other existing farmland of equivalent, or better, quality through planning policy that relies on an active and strategic use of the Williamson Act. 6 - Establishing buffers such as setbacks, berms, greenbelts and open-space areas to separate farmland from urban uses. Adopting a farmland protection program that utilizes such land use planning tools as transfer of development rights, purchase of development rights or conservation easements, and farmland trusts. The Department appreciates the opportunity to comment on the DEIR. We hope that the farmland conversion impacts and the Williamson Act contract issues are given adequate consideration in the FEIR. If I can be of further assistance, please feel, free to call me at (916) 322«-5873. j Stephen E. Oliva Er(v�ronmental Program coordinator cc: Kenneth E. Trott, Manager Land Conservation Unit Contra Costa Resource Conservation District t - 1 RESPONSES TO STATE OF CALIFORNIA DEPARTMENT OF CONSERVATION, STEPHEN E. OLIVA. MEMORANDUM DATED MARCH 23, 1992. Response 1 The project will have little or no impact upon the agricultural land to the northeast the project site. The land to the northeast of the project site is within the City's Sphere of Influence and its corporate limits, is designated in the City's existing General Plan for urban development, is closer than the project site to existing urban infrastructure, and is the subject of a pending development proposal. Therefore, it is unlikely that the project site, most of which is currently outside the City's sphere of influence and not designated for urban development, would have any effect on whether the property to the northeast develops. Land to the south of the project site is used for grazing. It is designated on the Important Farmland Map as Grazing Land and Farmland of Local Importance. As stated in Section Y of the draft EIR (Growth Inducing Impacts), the project may have a growth-inducing effect on the property to the south because the City's Sphere of Influence and corporate limits would be moved immediately adjacent to this property. As stated on pages D-7 and D-8 of the draft EIR, development of the project site could enhance the potential for urbanization of adjacent land to the south by malting this property contiguous to development. However, this land is being considered for urban development as part of the City's General Plan update. Therefore, the potential for urbanization of the Iand to the south of the project site may be more dependent upon policy decisions to be made as part of the pending General Plan update than upon development of the project site. This land is under a Williamson Act contract, which is scheduled to expire in February 1996. Therefore, cancellation of the contract on the project site would not affect eventual cancellation of the contract on the land to the south. Response 2 Section D of the draft EIR (Agricultural Resources) addressed the agricultural character of the project site and assessed the types and yields of crops grown on the site based upon the actual and historic use of the site, the U.S.D.A. Soil Conservation Service Soil Survey for Contra Costa County and Soil Candidate Listings, the Department of Conservation Important Farmland Designations, and the Contra Costa County Department of Agriculture 1990 Agricultural Report (see pages D-1 through D-4 and D-9 and D-10). Figure D-2 shows the Important Farmland categories for the project site and all land within and immediately adjacent to the Brentwood Planning Area. The vast majority of land within the Brentwood Planning Area is shown as Prime Farmland. As stated in the draft EIR i and-yin Response 1, above, the project will not affect whether the land to the northeast of the site is developed, which is the only intensively cultivated land C-36 Michael Paoli and Associates adjacent to the site. The remaining land adjacent to the site which could be considered affected is rangeland. Thus, an assessment of the types and relative -.. ., yields of crops would not be applicable. Concerning the agricultural potential"61f the site, the EIR indicates that although only the 58-acre walnut orchard qualifies as Prime Farmland die to being irrigated cropland, 180 acres of the site consists of soils listed as candidates for Prime Farmland (see page D-3). Response 3 The draft EIR addressed these items to the extent feasible and practicable in," Section D (Agricultural Resources), Section W (Cumulative Impacts), and Section Y (Growth Inducing Impacts). The specific places where these items are discussed are on the bottom of page -7 and the top of page D-8, Impact a on page D-12, pages W-1 through W-3, the last paragraph of page Y-1, and the top half of page Y-2. Response 4 Most of the project site is grazing land except for 58 acres of Prime Farmland in the northeast corner of the site.. This portion of the site is contiguous to the City limits, is within the City's Sphere of Influence, and is designated in the existing General Plan for Planned Employment Center uses adjacent to the proposed. Delta Expressway. Clustering units on the site or increasing densities so as to avoid this area would leave a small agricultural island surrounded by urban development and is, therefore, not considered to be a viable option. Three alternatives were considered in the EIR which would minimize the loss of grazing land on the site: "Existing General Plan", "No Hillside Development and Reduced plumber of Residential Units", and "Alternative Project Location". These alternatives are discussed in Section V of the draft EIR. Response 5 A policy already exists in Contra Costa County which protects agricultural and open space land. Contra Costa County, in 1990, established a 65/35 Land Preservation Standard which limits urban development in the County through the year 2005 to no more than 35 percent of all land in the County and requires at least 65 percent of the land to be preserved for agriculture., open space, wetlands, parks, and other non-urban uses. The County applies the 65/35 standard to all areas of the County, including urban and non-urban uses within City boundaries. An Urban Limit Line, beyond which no urban uses can be designated, has been established by the County to facilitate the enforcement of the 65/35 Land 5 Preservation Standard. The standard protects thousands of acnes of grazing land similar to that found on the project site and the prime agricultural core of the County, which is located south and east of Brentwood. The project site is located within the 'urban Limit Line, which allows for possible urbanization with the approval of a General flan amendment. i- Michael Paoli and Associates C-37 Response 6 The location and design of the project provides for appropriate separation from adjacent agricultural lands. The project site is separated from agricultural lands to the east by the existing Concord Avenue, adjacent to which the proposed Delta Expressway would be built. This land is within the current City limits, is designated in the General Plan for urban development, and is the subject of a pending development proposal. Agricultural land to the south, west, and north is open rangeland. Balfour Road, designated as a thoroughfare in the General Plan, would separate the property from rangeland to the north. The land to the north is also the subject of a pending development proposal. The project site directly abuts rangeland to the south and west. Substantial open space areas ranging from 200 to 444 feet in width are provided along the southern and most of the western boundary of the site. Response 7 The Contra Costa County General Plan, adopted in January 1991, includes the following implementation measure (S-be) related to transfer/purchase of development rights: Study the impact of adopting Transfer or Purchase of Development Rights (TDR/PDR) programs in priority areas of the County as a means of mitigating development pressures and preserving agricultural land. Conduct a detailed study of transfer/purchase of the development credits approach to determine. (1) the overall feasibility and usefulness in implementing General Plan policy; (2) the specific mechanisms to be utilized; (3) the areas of the County where these mechanisms could be utilized; (4) the organizational and administrative requirements of r _ such a program, including an analysis of the benefits of creating a non-profit land trust to hold agricultural land and easements, (5) the cost of the program to the County and potential revenue sources. Mitigation Measure D,1 has been added to the summary section of this final EIR, . .which states that the City shall encourage and support the implementation of the C-38 Michael Paoli and Associates County's Agricultural Resource Implementation Measure 8-be related to transfer/purchase of development rights and other policies and implementation measures related to preservation of agricultural land. f r Michael Paoli and Associates C-39 MTC ti METROPOLITAN TRANSPORTATION C O M M 15 5 1 O N CITY Df 69El4iW0tID coimuNin DUEL 0?WNT DEPT. xvmedA County March 30, 1992 EDWARD R.CMtrtfu Mark Jackson DAyto S.KARP Planning Department F : ComrAC041County City of Brentwood Rosexr 1.Scxtooft STM wfm 708 Third Street Chait Brentwood, CA 94513 !APR MAtin County .I•r-+.-. KAnN Kuwxt kagA Caunty I Subject: DEIR, Bre_ n_ twQo Hills_.Countcy Club huo NK*t x,,,;<in<i,c,. Dear Mr. Jackson: City Ana County HARRY C.Bary RUIJNGLICLOA+ This letter includes Metropolitan Transportation Commission UnM4troCounty (MTC) staff comments on the transportation system impact Tom NoLAN analysis in the DEIR for the Brentwood Hills Country Club sAN[BAKfR vcr.Ct„it development. The 751-acre project site is located at the S*nuC13tacounty southwest corner of Balfour Rd. and Concord Ave., immediatly Rao DtttDort southwest of the City of Brentwood. The project would include JA.ma T.sf..t.:,it. 1622 dwelling units and 870,000 sq. ft. of commercial and Souter County JAMES SMINC office development. sono++:Crun, . PrrftC.Foo"Amo 1. Regional Roadway lml2acts The traffic analysis under the ,w«utionof cumulative development scenario shows that the project would a,y Asea 00�u DzAmmt McKGvtw increase traffic on regional roadways by between 1% and 10% S.F.Sayeottevalion during the P.M. peak hour and that level of service would be E or "d C° " F for the roadway segments examined with or without the Delta ANCAtOJ.SMACVSd I Expressway. However, the DEIR notes that this analysis Tra"W .tom d assumes Considerable growth in employment in Brentwood. Hawsift Should this growth not occur or be delayed, impacts on regional PsusroN W.Kfufy Y U.S.Dent facilites could be greater due to increased outcommuting of ofTramww tion Brentwood residents. We recommend that the DEIR include a W».,iAm P.DtmuLsa worst case analysis of the regional traffic impacts by assuming U.S.0epomm" of Housing that less employment development will occur. A-a WWI%C?r.eiopre t CORDON H.MtKAY 2 The cumulative traffic impact analysis should identify the developments included. E:KutiK Dkvcw La :D.°"'t"'s 2. Rommended Mitigation The DEIR notes that the City of Deputy E.Kui;wDwtctw 3 Brentwood does not have authority to mitigate regional Wtuw.t F.Hum JOSEPH P. BORT METROCENTER • 101 EirKni STREET • OAKLokND,CA 946074700 • 415/464-7704 * FAX 416/464-7848 or el 'C � �•'3 C,�, gun G u � � r 3 �s tS'"`" yrs UP,O Gr• � �G�"'GcA y � '� G Off"'td".. ".� � %3 c3 G v �..• w '� � '""'G � ,� G r �'� � � 'of ,""'•'„� r i'.�, u�Cs 'G v ;S W W Bey t, °".• CA �. + C' 'U ,;. o ..�+ y V'„ 'wj• Ll3 �� ✓ 7r W �'� 'esel JS to al or. Cm vi SO el :' °t � �. V oma °, vZ Win✓ G ` Sj " Gj p GW 'j ✓rIy G'G r fs u D G C.G r S �" vt ti"' i.6 �.j � � u � � W � �t �+•� �'�'' ✓ A � r� wC9 ea '� rs' �'�s1,,". �,S 1!' ��i '•� � .� � � y, y� ��, �+ "� "er"�:+ +moi:�'CS�'�'+ ,>j �,":� Lit G .. p r. G ^J "► `r' G cs aria . • u .d. �,:• Sa � G-G •' u r is u C es es L. CS '.w `c+^ i"r �'+t�'' V •�` Y+ "7. v�r� �. •�✓. ty� C� G�`y /•y � ✓ y •-- W 9 � tl� � e'3 '� O '� � G C`,�' `�"r � s-,} '� tom• �•" W w � �„ •,�„', �' G ;,, .:�,,, :'. `� � '� � rs :: � chi V H � � �o �' ��' � �,,,,� �• so of u 01. v W � G ".. ..1 t`Z N'+ � w �'. � •uy W `� tit �J "` G '� N's •• N tz rs CS V 4 oc G ^ EJ .0 > �} O "' Q ',� U C •V Q c3 � GL�- C rsy r Yet •y �C.S,�•G' L" Q � � E �? > y < r t, rd 12, cu rz car '� `" p � `� r�i cr��.• 3 ry ' EE v � v C° tt -'~ ° vC.- ft c•v `s was t, :5 > Oto cr aVr es Q 'C3 bo ti U u H CC 's C C `63 p F:.aS G Ca iK C1 ................................... Response 3 The project site plan shows Concord Avenue lining up directly opposite the proposed southbound off-ramp of the Delta Expressway. A traffic signal at this location was assumed and should be able to handle traffic flows. The only other potential conflict to ramps is between the Concord Avenue/Delta Expressway Southbound Off-Ramps intersection with the eastbound-southbound on-ramp. Since this will be a free-flow movement, and westbound to southbound movements will be accommodated on the loop ramp in the northwest quadrant, the close proximity of the two "intersections" should not be a problem. >` Response 4 City staff are working with the developers on either side of Balfour Road to ensure that adequate separation is maintained between project driveways. Response 5 Comment noted. Response 6 The analysis in the DEIR used the baseline land use forecasts used in the last administrative draft EIR for the Delta. Expressway project, plus additional assumptions regarding cumulative development in Brentwood. The effects of this on the intersection of Balfour Road with the Delta Expressway are discussed in Response 2. Response 7 Mitigation measures to encourage transit are described in the DEIR (Mitigation Measure 2 on page G-26), and the new mitigation measure discussed under Response 2 to the Metropolitan Transportation Commission. Planning for a future rail extension at this site would be premature at this point, other than to provide needed right-of-way in the Delta Expressway corridor. Response 8 Section I of the DEIR calculated the cumulative 65 dB Ldn noise exposure contours for Balfour Road and the Delta Expressway. Mitigation Measure I,l,b requires that a noise standard of 45 dB Ldn be met for noise-sensitive uses located within the 65 dB Ldn noise contour. This assures adequate noise mitigation. Michael Paoli and:Associates C-47 Response 9 The DEIR assumed that Concord Avenue would be maintained across (under or aver) the Delta Expressway. It is understood that this is part of the current plans for the Delta Expressway. Response 10 Comment noted. Payment of a regional mitigation fee is part of Mitigation Measure I on page G-25. C-48 Michael Paoli and Associates ............................... Contra �{arrey E. E3rsgdxsrt community Director of community C*V*tovrr+ent Development { St . Department Ct�n#y County Administration Building 651 Pine Street 4th Floor, North Wing Martinez, California 94553.0095 'L APR 3 1992 Phone: (510) 646-2035 CM of eR::NTWWO COMMuNm oMoPMExT DEPT, March 31, 1992 Mr. Mark Jackson Brentwood Planning Department 708 Third Street Brentwood, CA 94513 Dear Mr. Jackson, Thank you for the opportunity to review the Draft EIR on the A.G. Spanos Brentwood Hills Country Club project. While the DEIR has much helpful information, there are other areas which require further elaboration. Figure B-3 clearly shows that the property of the Contra Costa County Flood Control and Water Conservation District is surrounded by the p.~oject proposal. The site plan on Figure B-4 shows that this proposal would place a private golf course on this publicly owned property. The DEIR does not address how a privately owned golf course will integrate this public use of this land. How will the golf course effect the existing public use of this property? What liability, operation and maintenance implications does this have on flood control use of the land? On Page B-8 it states that 4 ponds along the golf course will "provide scenic enhancement to the site as well as collect storm water runoff". Will these be operated by the City or will these be integrated within the Flood control District operation? If that is the intent to utilize the District then Flood Control District minimum standards for basins need to be addressed in the Final EIR. Can Page C-6, second paragraph, it states that all but 80 acres of the site are designated Agricultural Lands (a designation to preserve agriculture) yet the next paragraph states that this 2 project complies with the County General Plan. This is not correct. It would only be consistent if the County amended it's Plant to show this area for urbanization. The discussion on Table C-1 (Page C-12) on community size references the City policy "establish ultimate expansion levels for urban utilities . . .% but the response to that policy does not discuss limits on those services but only discuss another growth increment. This project may not comply with that city policy. Table C-1 on Page C-16 - 3 boundaries under discussion 3 further .indicates the project is "not reasonably compact due to the extensive amount of open space . .`. This should trigger the need for an alternative which clustered the development and provides a buffer to new development to the west and south. Such an alternative needs to be considered for the final BTR. Jackson Letter March 31, 1992 Page Two 4 Page D-3 states a notice of non-renewal has been filed with the City of Brentwood. That must be in error since the site is in the unincorporated area. Can Page D-7 under Williamson Act findings it states "that the ability to induce urban development does not appear to be substantial * With the Cowell Ranch to the south and with 5 other development proposals to the north it would appear these findings need to be restated or reanalyzed. On Page F-1 1 the DEIR states the site appears to be at the northern edge of the San Joaquin kit fox range and on Page F-7 it states this site is within a mile of a confirmed sighting. U.S. Fish 6 and Wildlife and California Fish and Came have indicated to the County that in these cases a 3 to 1 acreage mitigation is required. - The Final EIR needs to verify with those agencies if mitigation is required. If on-site mitigation is necessary, then an alternative which provides that option should be provided. Under the rubric of Traffic and Transportation for Section G-1 of the DEIR, there are general and specific comments to this proposed development. The general comments primarily focus on the analytical approach in determining the developments's impact on the existing level of service (LOS). The approach undertaken in the analysis compares and contrasts existing conditions, currently "on the ground," and existing conditions coupled with the development's conditions. Although this approach has some degree of merit in determining the development's singular share of impacts on the surrounding transportation network, it embraces the development in a vacuum and neglects to consider the 7 share of impact*in concert with approved developments in the Brentwood area. Referencing Page 3-6 of the Hancock Project Specific PlanfEIR Study, the DEIR stated that 2,259 housing units have been approved. Any approved projects in Brentwood coupled with the 1622 proposed housing units (1202 sf + 318 apartments, 102 townhouses), elementary school, day care center, golf course, neighborhood shopping center, and employment center should all be included in the analysis, along with the most recent CIP. Discussions with the Contra Costa Transportation Authority staff concur that developments within the 19 Contra Costa jurisdictions, exceeding 100 a.m. or p.m. peak hour trips must use the Technical Procedures published by the Transportation Authority as the frame work of analysis. Specific comments are the following: 0 The DEIR assumes that the 160,100 square foot neighborhood shopping center would have a pass-by rate of R89a and 23-9c' for a.m and p.m.,respectively. According to the 8 ITE Trip Generation Manual, 5th Edition, 1991, the rates range from 207 65% for shopping centers with 144,000 166,000 square feet having between 6,000 - 85,000 ADT on adjacent streets. The DEIR should substantiate the use of its pass-by rate as - indicated, with respect to the pass-by rates in ITE. Jackson Letter March 31, 1992 Page Three Traffic Distribution/Assignment. The DETR stated on Page G-17 that: "Distribution of project traffic was estimated with the aid of the regional traffic model (year 1988) . . ." The County has undergone modeling efforts in four sub-areas, including East County -- 9 the general location of the subject EI-R. The East County model for 1990 is the most current for that area, with current land use assumptions. This model should have been used for the analysis of the subject project. Substantiation is necessary for using-the 1988 outdated model. 0 According to the interim policies established by the Board of Supervisors, December 12, 1989, regarding routes of regional significance, any development that adversely impacts identified routes of regional significance must be mitigated. The following facilities are necessary for inclusion in the analysis and mitigations to the previous LOS without project related traps: BYRON HIGHWAY DEER VALLEY ROAD I Camino Diablo Lone Tree Way SR 4 (North intersection) Balfour Road SR 4 (South intersection) Marsh Creek Hillcrest Avenue HILL+CREST AVEN'(JE A.STREET/LDNE TREE WAY SR 4 WB Ramps East 18th Street SR 4 EB Ramps SRA WB Ramps Lone Tree Way SR 4 EB Ramps East Tregallis Tregallis James Donlon Blvd. Hillcrest Avenue SATE ROS 160 Empire Fairview Victory Highway NB Ramps O'Hara Avenue Victory Highway SB Ramps SR 4 (Oakley-Brentwood) Wilbur Ave. NB Ramps Wilbur Ave. SB Ramps M_MARSH CREEK RD.-CAMIN0 DIABLO WALNUT AVENUE-VAC RQAD Kirker Pass Marsh Creek Road Balfour Road 'Walnut Blvd. Marsh Creek Road Camino Diablo Jackson Letter - March 31, 1992 Page Four STATE ROUTE 4 Somerville Rd. EB Ramps Somersville Rd. WB Ramps Conte Loma EB Ramps Contra Loma WB Ramps Lone Tree Rd. EB Ramps Lone Tree Rd. WB Ramps Hillcrest Ave. EB Ramps Hillcrest Ave. WB Ramps STATE ROUTE 4 ("Non-Freeway) State Route 160 NB Ramps Byron Highway (South) Sycamore Avenue State Route 160 SB Ramps Second Neroly Road Dainty Big Break Road Oak Street Oakley Road Balfour Road Cypress Road Sellers Delta Road Byron Highway (North) Lone Tree Way Marsh Creek West Sand Creek . .� The statement on G-51 that: "... there lacks an existence of mechanisms for Brentwood ..." to mitigate project impacts in neighboring or regional jurisdictions is insufficient. C Revisions to the site plan may be warranted that would provide a grid system of streets on the west side of the Delta Expressway for alternative north/south and east/west routes, relieving some burden on the freeway -arterial network. At a minimum, the developers should consider modifying the site plan to accommodate (or feed into) the eventual 12 extension of Hillcrest Avenue south to Balfour. Additional consideration should be given, however, to have a grid network of minor collector streets to provide additional circulation beyond the freeway - arterial. network. A grid network also gives additional flexibility for providing bus transit service to the area. a On page G-25 and G-55, regarding,project impacts and transit mitigation measures, the DEIR states that the applicant would provide "... right-of-way for bus turn outs fronting the project site on Balfour Road and ... bus shelters." This provision is insufficient 13 - because these shelters would still be beyond walking distance of residential and a employment concentrations of the development site. These transit provisions, moreover, Jackson Utter March 31, 1992 Page Five should be internal to the site, (in conjunction with the previous comment above), around and near residential and commercial concentrations, thereby increasing the likelihood of transit passenger boarding/alighting within the development site. 0 A discussion in the transportation section should include Transportation Demand Management measures, advocated by the Bay Area Air Quality Management. These discussions should also include tying into the existing bicycle path system; providing 14 bicycle racks where appropriate; and other similar measures that reduce single occupancy vehicles during peak yours in achieving 1.5 AVR. Responsibility of the latter should be identified, along with achievable goals and objectives. On Page K-1 it states the potential to get Contra Costa Water District water might be possible in the future from Las Vaqueros reservoir sources. It is my understanding that Las Vaqueros 15 Reservoir water will be limited to serving the areas within the District and within Antioch and Oakley spheres of influence and won't be available for other new areas. What source of water is proposed to be utilized for CCWD to serve this area? j 4n Page K-3 mitigation measure(4) on water conservation is very loosely written and needs to 16 be made more specific to be implementable. On Page P-1 it states that fire protection response times exceed District response times. How does this relate to the City growth Management Standards and potential project approval? With the City rapidly growing, what mitigation measures can be suggested to fund an urban level paid 17 fir fighting force rather than reliance. on volunteers. Can a special fee zone be established to fund permanent staff for the proposed additional 6,900 homes being considered by the city? Mitigation Measure on Page P-2 on financing a new fire station is torn vaguely worded to assure a new fire facility. A new station and new equipment is the minimum that should be required for this project. 18 How this project meets the growth management requirements of Measure C needs to be addressed for each urban service. If I can help interpret these comments feel free to call me at (510) 646-2035. i Sincerely yours, J ames W. Cutler Assistant Director of Comprehensive Planning JWC/ml L jwc/jackson.ltr RESPONSES TO CONTRA COSTA COUNTY COMMUNITY DEVELOPMENT DEPARTMENT, JAMES W. CUTLER. LETTER DATED MARCH 31, 1992. Responsel. The golf course, which is an open space use, will not interfere with the flood control function of this land and the Flood Control District has not indicated any objection to golf course use of its property. In order for the project to use the Flood control District land, a lease agreement will need to be executed between the District and the Applicant. Mitigation Measure 3,1,e provides that no buildings, roadways, or other structures which might interfere with the flood control function of the existing detention basins, as determined by the City and the Flood Control District, will be located in the flood control easement or basin. The Applicant will be responsible for the operation and maintenance of the golf course and the Flood Control District will have access to its land for flood-control-related operation and maintenance. Liability is not an.environmental issue and will be worked out through an agreement between the Applicant and the District. As a private golf course, the golf course water features would be operated and maintained by the Applicant. Public storm drainage would not be diverted into private ponds. If the course were to become a municipal course, the City would be responsible for the water features. Response 2 The third paragraph on page C•6 of the draft EIR does not state that the project complies with the County General Plan. It states that "an evaluation of the project's consistency with the applicable land use policies of the Contra Costa County General Plan is presented under Impact h in this section". The discussion under Impact h concludes that the project is consistent with most of the applicable land use policies of the County General Plan but is inconsistent with policies related to infilling of already developed areas, preserving and buffering of agricultural land and open space, hillsides and ridgelines, and protecting prime agricultural land. Response 3 -The way that the City establishes ultimate expansion levels for urban services is primarily through the establishment of Capital Improvement Financing Programs. This project has agreed to participate is such a program. The proposed project design provides substantial open space areas ranging from 200 to 400 feet in width along the southern boundary and most of the western boundary of the site. (A substantial portion of the western open space buffer consists of the relocated power line easement.) Additionally, three alternatives were considered in the EIR : .which would act to buffer adjacent land to the south and west. "Existing General C_54 Michael Paoli and Associates Plan" and "No Hillside Development and Reduced Number of Residential Units" and "Alternative Project Location". These alternatives are discussed in Section Y of the draft EIR. Response 4 This sentence is in error and should state that a Notice of Non-Renewal has been filed with Contra Costa County. This error is noted in the errata section of this final EIR. 3. Response 5 As stated in Section Y of the draft EIR (Growth Inducing Impacts), the project may have a growth-inducing effect on the property to the south because the City's Sphere of Influence and corporate limits would be moved immediately adjacent to this property. As stated on pages D-7 and D-8 of the draft EIR, development of the project site could enhance the potential for urbanization of adjacent land to the south by making this property contiguous to development. However, this land is being considered for urban development as part of the City's General Plan update. Therefore, the potential for urbanization of the land to the south of the project site may be more dependent upon policy decisions to be made as part of the pending General Plan update than upon development of the project site. This land is under a Williamson Act contract, which is scheduled to expire in February I996. Therefore, cancellation of the contract on the project site would not affect eventual cancellation of the contract on the land to the south. The land to the north of the project site (Hancock property) is the subject of its own development proposal for which a draft EIR has been prepared. This land is also being considered for potential urban development as part of the City's General Plan update. Given these factors, the policy decision as to whether the property to the north is to be designated for urban development is not dependent upon whether the proposed project is approved. Response 6 The draft EIR concluded that the impact upon the kit fox and kit fox habitat was less than significant. The draft EIR was distributed to the California Department of Fish and Game and no comments were received. Response 7 There are many ways to analyze a project's transportation impacts. Several months of discussions were held between the consultants and City staff regarding the most effective approach. Since there were several large projects being studied at once, it was determined that a shorter term existing plus approved projects scenario would be just as unrealistic as any other. As a result, it was decided to Michael Paoli and Associates C-55 study the effect of each project on existing conditions, and then test to make sure that the whole system, at buildout of the City, worked. Response 8 As noted in the comment, the data on pass-by traffic assumptions varies widely from location to location. It is up to the analysts to use their judgment about appropriate rates. Considering the proximity of the neighborhood shopping center to housing, the rates shown were considered conservative (i.e., on the low side). Response 9 The new traffic model referenced in this comment was not available at the time this study was done and is,still not completely developed. Response 10 Impacts and mitigation measures for a selected group of regional roadways are discussed on pages G-49 through G-51 of the DEIR. It was found that mitigation of these facilities would need to be a regional effort. The additional level of detail requested in this comment would not substantially change these findings. Response I I The mechanisms to deal with regional transportation mitigation are currently under discussion by the TRANSPLAN committee through its Action Plan process. The statement on page G-51 is an accurate representation of current conditions. Response 12 The proposed project includes a centrally Iocated golf course which, combined with the terrain, would make a grid street system impractical. Currently, no development is designated in the General Plan west or south of the project site. However, development is being considered for these areas as part of the General Plan update. The project development plan provides sufficient opportunity for potential collector street connections to the west and south should development be approved in these areas. { Response 13 Comment noted. A mitigation measure is included in the DEIR for the Applicant to coordinate with area transit agencies and the City to extend existing transit routes to the project site (Mitigation Measure G,4,b). This measure has been revised in the final ETR to require the transit routes be extended to and within the f . project site. C-56 Michael Paoli and Associates Response 14 See Response 2 to Metropolitan Transportation Commission. Response 15 Page K-1 of the draft EIR states that the City has entered into an agreement with the Contra Costa Mater District to obtain water from the Randall-Bold Treatment Plant. It does not mention the Las Vaqueros Reservoir. Groundwater is the.. primary source of water to be used to supply the project area. However, the ability' to obtain CCWD water provides a reliable future supply of water in addition"to groundwater. Response 16 In response to this comment, Mitigation Measure K,I,d in the draft EIR (now K,1,e in this final EIR) has been amended as follows: The Applicant shall prepare and submit to the City a detailed water conservation program for the project which shall include but not be limited to the following items: • Drought-resistant trees, shrubs, and ground cover shall be used in all areas of the project site proposed for landscaping whenever possible. A landscaping plan which delineates the types and locations of drought-resistanE trees, shrubs, and ground cover shall be submitted. • Drip irrigation shall be used to the extent feasible and shall be shown on the landscaping plan. • Low-flow toilets and shower heads shall be installed in all dwelling units. • A water-management plan for the golf course shall be prepared and submitted that sets forth the water conservation techniques that will be used in the management and operation of the golf course. Response 17 The construction and staffing of a new fire station on Fairview Avenue, south of .Balfour Road, is required as part of the Brentwood Lakes development immediately east of the project site. (Ince this station is completed, the project site would be adequately served. The new fire station is likely to be constructed prior to the beginning of construction of the proposed project, if approved. However, if Michael Paoli and Associates C-57 the fire station is for any reason not constructed in a timely manner in relation to the proposed project, Mitigation Measure P,l,a provides for appropriate fire protection facilities on the project site as determined by the East Diablo Fire Protection District. The wording of the measure is intended to allow flexibility such that a temporary fire station could be provided on the site if the planned station in the Brentwood Lakes development is delayed beyond the start of construction of the proposed project, if approved. With respect to the long-term future outlook for fire protection for the Brentwood area, this is being addressed by EDFPD Master Plan being developed by the District. Mitigation Measure P,3,a states that future development in the City of Brentwood shall be subject to the provisions and standards of the EDFPD Master Plan. Response 18 In order for the City to receive funding under the 1988 Measure C, it must have a Growth Management Element in its General Plan. The City's current General Plan does not have such an element but one will be included in the City's updated General Plan. As such, the City has not formally adopted specific performance standards for services but does have development fees and capital improvement financing program requirements to insure the provision of adequate infrastructure and facilities for new development, including the proposed project. C_58 Michael Paoli and Associates MCCUTCHEN, DOYLE, GROWN IS. ENERSEN SAM rA—CISCO COUNSELORS AT LAW w�s..itiCtoN. o C LOS ANGCLCS 1331 NORTM CALWORNIA BOULEVAPO TA dt SAN J05C POST OCFICE 80X V wAtNVT CRCLK WALNUT CREEK. CALIYORNIA $4596 AI'rltrAtt'J OrrICC TELCPMONC (510) 937-aODO pANGrcOK FACSIMILE (SIO) 075-5300 March 31 , 1992 D"MCCT DIAL NV"MtR y(SS©I 975-5376 r VSA FACSIMILE Mark Jackson `APR Planning Department City of Brentwood 708 - 3rd Street Brentwood, CA 94513 Draft Environmental Impact Report Brentwood Hills Country Club City of Brentwood EIR File No. 90--2 Our File No . 72748-002 Dear Mr . Jackson: We represent A. G. Spanos Land Company in connection with the Brentwood Hills Country Club proposal currently under consideration by the City of Brentwood ( "Project" ) . We have reviewed the February 1992 draft Environmental Impact Report ( "EIR" ) , and have the comments listed below. Please note that where a recommended change is made to the text of the EIR, a corresponding change may be appropriate in the ESR Summary, analyses. of Project alternatives, the relationship between short-term uses and long-term productivity/cumulative impacts, significant irreversible environmental changes, and growth-inducing impacts (Sections V, W, X and Y of the ESR) . We have tried to identify where corresponding changes will be needed. However, your consultant should run an independent check to insure internal consistency. I. GENERAL COMMENTS Comment 1 : The applicant ' s name, A. G. Spanos, has '� been deleted from the name of the project . The current name is Mark Jackson March 31 , 1992 Page 2 "Brentwood Hills Country Club. " The words EIR' s references to the Project Name should be modified accordingly. Comment 2: The EIR indicates on pages A-5, A-14 , A-53 , C-11 , F-10 through F-11 , V--6, V-8 , V-9 , V-11 , V-13 , and X-1 , that the Project ' s impacts on oak trees will be significant and unavoidable. This assessment overstates the level of the impact after the implementation of mitigation measures . The Project calls for the removal of 21 oak trees , which will be replaced at a ratio of 3 : 1 . This high ratio of replacement with healthy young trees will more than offset the loss of food, shelter, roots and nest sites associated with mature oaks . See Comments 35 and. 36. The EIR should be . modified to reflect that the Project 's impact on oak trees is significant, but will be reduced to insignificance through the imposition of these measures . Comment 3 : The EIR indicates on pages A-5, A-16, A-53 , C-11 , C-18 , T-1 through T-2, V-6, V-8 , V-9, V-11, V-13, and X-1 , that the Project will have a significant and unavoidable visual impact because of the proposed' alteration of the Project site. This characterization should be expanded as 3 indicated below in the section-by-section analysis to reflect that the characterization of a visual change as adverse or beneficial is a subjective issue. See particularly Comments 45 and 46 . Ultimately, only the City Council, as lead agency, can determine whether to characterize a visual change as significantly adverse, insignificantly adverse, , beneficial or neutral . II . SECTION-BY-SECTION ANALYSIU, Section A: Summary. Comment 4 (Page A-4) : The significance of the potential inconsistencies with the Brentwood General Plan land use policies relating to purported significant and unavoidable ..`impacts from the loss and endangerment of oak trees ,and the alteration of hill topography is overstated. The loss and endangerment of oak trees is a mitigable impact, and the significance of the alteration of hill topography is subjective, as explained in Comments 2, 3, 35, 36, 45 and 46. Accordingly, the fallowing text should be added after the discussion of Impact 6 : "(not potentially significant) . " The discussion under the heading „Reducible To . .._ Insignificance" should be replaced by the following text: Mark Jackson March 31 , 1992 Page 3 } The mitigation measures described in Sections F and N will reduce to insignificance the impacts related to oak trees and potential hazards . The mitigation measures described in Section T will insure 4 that the project is an aesthetically y' pleasing development, thus it may be determined that the residual visual impact is insignificant . However, this is a subjective issue, and some may find the ! change to the existing vistas both significant and adverse even after the imposition of mitigation measures . Lastly, it should be noted that inconsistencies with general plans or other land use regulations are not in themselves environmental impacts, but are rather lural and policy considerations .. Comment 5 (Page A--5) : As. discussed in further detail in Comment 25, ' the mitigatimeasures- relating to the elementary school site should be expanded. The elementary school site is not a significant impact. Accordingly, the following should be added to the end of the description of Impact 5 : " (not potentially significant) . ,. The first sentence of the discussion of Mitigation Measure 5 should be replaced with the following text : None required. However , if access to the current site cannot be secured, the school site could be moved to a location that is wholly accessible within the Spanos site. Comment 6 (Page A-.6) : As explained in Comment 41, Mitigation Measure 3(f) should be replaced by the following: Access for maintenance of the towers and conductors shall be provided. Measure 3(g) should be replaced by the following: Protection for tower footings shall be provided. ? Comment 7 (Page A-10) : In Mitigation Measure 5(a) , line 5, the EIR should state that cut material will be taken Mark Jackson March 31 , 1992 Page 4 7► from within the Project site, rather than from the taps of ridges . Comment 8 (Page A--14 ) : As discussed in Comment 2, the project ' s impacts relating to oak trees are reducible to 8 insignificance by the imposition of the mitigation measures described in the EIR. Accordingly, the "no" under the heading "reducible to insignificance" should be changed to a "yes . " Comment 9 (Page A-16) : According to the text of the EIR, the lack of a second access to the country club does not require mitigation measures. See pages G--22 through G-23 . Accordingly, •the following text should be added to the discussion of Impact 2: ( lack of emergency access to the country club is not considered potentially significant) . Cocrment 1 (Page A-24 ) : Mitigation pleasure 1(a) 10 should reflect that the sound wall will be located 60 feet frog the roadway center line. Comment 11 (Page---A---29) : Mitigation Measure 1(a) indicates that two new water reservoirs will be constructed, which may be more than required. Accordingly, the words "two new water storage reservoirs" in the first bullet of the mitigation measure should be replaced with the words "at least one new water storage reservoir . " Comment 12 (Page A-30) : With respect to Mitigation Measure 1(a) , fourth bullet, the size of pipelines needed to extend the distribution system has not been determined. Accordingly, •the words "24-inch" should be deleted. The language of the next bullet should be replaced by the following item: Participation in a city-wide fee for connecting the City' s water system to the 12 Randall-Bold Treatment Plant if necessary. Mitigation Measure 1(c) should be rewritten to read as follows : A new distribution conduit will be installed as rerruired by the ECCID to replace the Mark Jackson March 31 , 1992 Page 5 existing concrete ditch which now forms the _ eastern boundary of the Spanos site . Comment 13 (Page A-31) : There is a typographical 13 error in the last sentence of Mitigation Measure 3; "structure'. is misspelled. Comment 14 (Paas A-32) : There is a typographical 14 error in the discussion of Mitigation Measure 3 . "Structure" is misspelled. Comment 15 (Page A-37) : Mitigation Measure (a) should 15 be revised to provide that the pipelines shall be rerouted to minimize passage under residential lots or paved street rights--of-way in residential areas . Comment 16 (Page A-41) : In Mitigation Measure 1(c) , fourth line from the bottom; the following text should be 16 inserted after the words "community facilities district" : or other appropriate funding vehicles" . Comment 17 (Page A--46) : As explained in Comment 3 and Comments 43 and 44 , the significant and unavoidable character 4 of the project ' s impact on scenic vistas cannot be determined in the EIR. Accordingly, the word "no" under the heading 17 "Reducible to Insignificance" should be replaced with the following language: This is a subjective question that must' be answered by the City Council as lead agency. Comment 18 (Page A-=47) : The impacts of cumulative development are similarly subjective. Accordingly, the. "no" under the heading "reducible t,o insignificance" should be 18 replaced with the following language: This is a subjective question that must be determined by the City Council as lead agency. Comment 19 (Page A-53) : Under the heading of "significant and unavoidable impacts, " the impact on oak trees should be deleted. As explained in Comments 2, 35 and 36, this 19 impact can be reduced to insignificance. The visual impact should be moved from the significant and unavoidable category down to the next category, "Unresolved Or Controversial Issues . " As explained in Comments 3 , 45 and 46, the nature of Marx Jackson March 31 , 1992 Page 6 this impact is subjective . The reference to the loss of the Brentwood Coal Mine site should be deleted, for the reasons explained in Comment 47,' there is no substantial basis for concluding that the lass of this site would be significant . Comment 2Q (Page A-55) : The EIR characterizes the No Hillside Development and Reduced Number of Residential Units alternative as able to attain the basic objectives of the project . This is inconsistent with the description of the alternative beginning can page V-8, which indicates that this alternative would accommodate at most 866 single-family units, 756 units less than, the Project. To reflect this difference, the following text should be substituted for the first sentence of the first full paragraph: 20 Of the first three alternatives, only the No Hillside Development and Reduced Number of Residential Units alternative involves a development of the basic scope and nature as the proposed Project . However, this alternative reduces project impacts only at the sacrifice of at least 336 single-family units. one variation of this alternative also sacrifices the golf course. Section C: Land Use. ' Comment 21 (Page C-Li) : The third full paragraph should be replaced with the following text : The City of Brentwood is currently updating its General Plan. The updated General Flan will provide for growth within the Brentwood planning. area up to the year 2024. The, papulation projections for this period are between 73,000 and 107,000 . Comment 22 (C-4) : The first sentence of the second . paragraph under the heading "surrounding land uses" should be 22 replaced by the following text: "The nearest urban development, the Apple Hill Project, is about one-quarter mile away. Comment 23 (Page C-6) The following sentence should 23 be added to the second full paragraph: "The Project is within the County' s Urban Limit Line. " Mark Jackson March 31 , 1992 Page 7 — Comment 24 (Page C-7) : The following sentence should be added to the paragraph which ends at the top of page C-7 : The significance of this increase must be evaluated in light of the anticipated 24 cumulative growth in the Brentwood, area to between 73 , 000 and 107, 000 by the year 2020 . Even under ABAG' s conservative 1989 projections, the City' s population is expected to increase by 344 percent by the year 2005. Comment 25 (Pages C-9 through C--11) : . The location of the school site will only pose a problem if the access thereto cannot be obtained. Accordingly, the mitigation measure for 25 Impact e should be expanded to 'recommend as an alternative requirement that, prior to commencing construction, the applicant demonstrate the ability to provide- access to the currently proposed site. Comment 26 (Wage C-10) : The following sentence should be added to the first full paragraph: 26 The visual significance of the loss of the hill is a subjective issue to be resolved by the City Council as lead agency. Comment 27 (Page C-11) : The EIR concludes that there is a significant and unavoidable impact relating to consistency with the Brentwood General Plan, because of the Project ' s impacts on oak trees and hill topography. However, as explained in Comments 2, 3, 34 , 35, 43 and 44 , these impacts are not significant and unavoidable. Accordingly, the discussion under the heading "Level of Significance" should be replaced by the following text: The Project' s impact on oak trees will be 27 lessened to a level of insignificance by the mitigation measures recommended in Section F. .The potential hazards related to the Project will be reduced to insignificance by the mitigation measures recommended in Section N. The mitigation measures recommended for the alteration of hill topography will substantially reduce visual impacts. Whether the remaining visual impact will be both significant and Mark Jackson ~ March 31 , 1992 ?gage 8 adverse is a subjective (Taescion. The project will be carefully designed with respect to visual effect, and many viewers will find it aesthetically pleasing. Nevertheless, the change may be considered a 27 significant and unavoidable impact to persons who enjoy the current view. Ultimately, the significance and adverse character of this change must be decided by the City Council as lead agency. Comment 28 (Paeze C--18) : The discussion of Residential Policy 1 should be replaced with the following text : The project will result in the removal and potential endangerment of oak trees . The loss will be mitigated to insignificance by replacement at a ratio of 3 to 1 . Threatened trees will be protected by the measures described in Section F. The potential hazards related to the project 28 will be mitigated to insignificance by the measures described in Section N. The effect of the alterations to the topography of the hills is a subjective issue and some may consider the change a significant and an unavoidable visual impact. However, the mitigation measures described in Section T will insure the creation of an attractively designed project, which many will find visually pleasing, Comment 29 (Page C-19) : The EIR indicates that there is a possible inconsistency with objective 5.3 of the preliminary Land Use Element of the updated General Plan. This conclusion is based on the Project' s impact on oak trees and visual resources . As explained in Comments 2, 35 and 36, the ,,oak tree impact will not be significant after the imposition of mitigation measures . As explained in Comments 3 , 45 and 46 , the significant andadverse character of the Project ' s visual 29 impacts is a subjective issue. Accordingly, the last paragraph of the discussion of Impact g should be replaced with the following text: The Loss and potential endangerment of oak trees on the project site will be reduced to insignificance by the imposition of Mark Jackson March 31 , 1992 Fuge 9 mitigation measures recommended in Section F. The mitigation measures recommended in Section T will substantially reduce the project ' s visual impact associated with the alterations to the hilltop areas . However, whether this impact 29 will remain significant and adverse is a subjective issue, to be decided by the City Council as .lead agency. In this context, it should also be noted that the goals and objectives in the General Plan are policy guidelines, rather than strict and specific prohibitions or mandates . The extent to which any development proposal furthers or is inconsistent with a goal or objective is a policy decision, thus within the Jurisdiction of the City Council . Comment 30 (Page C-21) : The following sentence should be added to the second paragraph of the discussion of 30 Policy 3--12 : "The significant and adverse character of this change is a subjective issue, thus must be determined by* the City Council as lead agency. " j Comment 31 (Page C-24) : The City' s CUP program promotes the planning goals of Government Code section 56377 by providing for the creation and improvement of infrastructure to accommodate anticipated growth. Accordingly, the discussion of i the project ' s consistency with Government Code section 56377(b) should be clarified by replacing the paragraph which begins at the bottom of the page and continues at the top of page C--25 with the following text: In certain respects , the proposed Project may appear inconsistent with Section 56377(b) . The policy directs LAFC© 31 to encourage development of existing open space land for non open space uses that is outside existing City limits and for the most part outside the City's sphere of . influence. However, the City requires that all projects of this nature participate in a capital improvement financing program ( "CUP" ) . These programs effectively provide for the phasing of development as necessary for its services or financed unable to be provided. This project is Mark Jackson March 31, 1992 Page 10 within CIFP 91-1 , which is the third CIFP to be established. The projects within the first and second CIFPs are within the City limits and will likely be constructed ,prier 31 to those projects in the third CIFP. The CIFP requirement thus encourages the development of land within the existing City limits and sphere of influence prier to development of lands lying outside. Section D: Agricultural Resources. Comment 32 (Page D-6) : The last sentence of the discussion of finding A should be replaced with the following text : The updated General Plan is intended to 32 provided for growth within the Brentwood planning area to the year 2020, and estimates an ultimate buildout population of between 73,000 and 107,000 . If these projections are accurate, the project will be required to fulfill housing needs in the Brentwood area. C6mment 33 .(Pages D-9 throuczh D-10) : The DEIR t concludes that the economic loss of agricultural products produced on the site is 'a significant and unavoidable impact. The lost value is estimated to be $143,484 . The EIR does not consider the economic value that will result from the development of the project, which more than outweigh this amount . The Project will result in the creation of 33 1, 522 homes, as well as office and commercial space, a golf course and other amenities . At present, the price of a new home in a standard subdivision in the area (i .e. , a development C ithout substantial amenities) is in the mid--$100, 000s. The Project ' s units will be more valuable than this because of the Project 's amenities and commercial component. Based on the foregoing facts, the EIR should reflect that the Project will result in a net economic benefit . Comment 34 (Pacfe D-12) The EIR concludes that there .. will be significant cumulative impacts from the conversion of Mark Jackson March 31 , 1992 Page 11 agricultural lands . This should be expanded by substituting the following text for the discussion of Impact a : Full development of the Brentwood General Plan and the projects considered in the cumulative analysis would result in the development of about 9 , 800 acres, a substantial portion of which is used for agricultural purposes and designated as 34 prime farmland on the Contra Costa County Important Farmland. Series Map (Department of conservation, 1990) . This is considered to be a significant unavoidable adverse impact. However, the Project itself entails the conversion of only 693 acres of grazing land, i .e. , non--prime land, and 58 acres of prime farmland. Accordingly, the Project " s .:1 incremental contribution to the cumulative impact is relatively small . The cumulative conversion of agricultural land to urban L uses would remain a significant impact with or without the Project . Section F: Biological Resources. Comment 35 {Pages F-10 through F-11) : As noted in the EIR, the project involves the removal of 21 oak trees . Fifty-four additional oak trees will be incorporated into residential lots and streets, the EIR classifies these 54 trees as "endangered. " Contrary to the representations of the EIR, it is possible to mitigate the potential impact upon trees to insignificance. The planting of three trees for each one 35 removed will avoid or reduce to insignificance the diminished amount of food, shelter, roots and nest sites represented by the oaks . The 54 trees that are characterized as endangered will be protected by mitigation measures (1) through (3) , described on page F-10 . See attached letter from James Gibson of Huffman & Associates. Accordingly, the discussion under the heading "level of significance" on page F-11 should be replaced with the following text: The above mitigation measures will reduce the imrsact to a level of insignificance. Comment 36 (Page F-13) : The EIR concludes that the 36 ' cumulative impact on the loss of biotic resources will be significant and unavoidable, because of the conversion of March Jackson1992 9 2 Page 12 a 9 , 800 acres of mostly agricultural or open space to urban development . The Project represents only 751 acres of this 9, 800-acre total . Accordingly, the fallowing text should be added to the discussion of impact A: It should be noted that the project 36 currently under consideration involves only 751 acres, a small increment of the 9 ,800 acres that will ultimately be converted to urban develoent. . Accordingly, this cumulative impact will be significant whether or not the project is approved. Section G: Traffic and Transportation. Comment 37 (Paces G--49 through G-51) : The EiR indicates that cumulative development will significantly impact regional roadways . According to Table G-10, the Project will contribute only a small component of anticipated cumulative traffic increases. Accordingly, the following language should be added to the end of the discussion of impact B at the top of page G--51 : 37 As illustrated in Table G--10, the project is expected to contribute as little as -I percent, and no more than 8 percent to cumulative traffic on regional highways . Accordingly, this cumulative impact will be significant whether or not the project is developed. Section K. Water Supply- Comment 38 (Page K-31 : The number of water storage facilities required by the Project cannot be determined at this time. This issue will be determined through the CIFP. Accordingly, the wards "two reservoirs" in the first bullet of Mitigation Measure (1) should be changed to "at least one reservoir" . 38 The size of pipeline needed to extend the Balfour Road main distribution system is also unknown, thus, the wards „24--inch" should be deleted from the second bullet of the mitigation measure. Lastly, Mitigation Measure (3) should be revised as follows : Mare Jackson March 31 , 1992 Page 13 A new distribution conduit will be installed as required by the ECCID to replace the existing concrete ditch which now forms the eastern boundary of the Spanos site. Section N: Hazardous Conditions . ?.. Comment 39 (Pane N-1) : The first paragraph of the discussion of electric transmission lines overstates the number 39 of lines crossing the Project. There is only one set of 230 kilowatt electric transmission lines. Comment 44 (Page_N-3}: Mitigation Measure (6) and (7) go beyond the needs of the Project. Measure (6) should be replaced with the following: Access for maintenance of the towers and conductors shall be provided. 40 Measure (7) should be replaced with the following: Protection for tower footings shall be provided. Comment 41 (Pane N-14) : The discussion of Mitigation Measure ( 1) should be clarified to read as follows: Re-route the PG&F/StanPac and Chevron 41 pipelines so as to minimize placement -of pipes under residential lots or paved street rights-of-way in residential areas (perpendicular crossing of streets is preferable) . Section P: Fire Protection and Emergency Services . Corm" ent 42 (Page P-3)_., As noted in Comment 32, the amount of reservoir storage that will be required to serve the project is not known at this time. This amount will be determined through the C1FP process . ,Accordingly, the sentence under the heading "Level, of Significance" should be revised to 42 read as follows: This impact is not considered to be potentiill.y significant as long as the mitigation measures in Section K, which would provide for: one or more higher Mark Jackson. March 31 , 1992 Page 14 elevation water storage reservoirs to serve the project area, are implemented. Section R: Parks and Recreation. Comment 43 (Page R-3) : The reference to the Quimby 43 Act in the discussion of the mitigation measure for Impact A should include the legal citation for the Act, Government Code Section 56577 . Comment 44 (Page R-4) : The discussion of Mitigation Measure ( 1 ) should be clarified as follows: The City of Brentwood shall continue to 44 require park dedications and./or fees as a condition of developmental approvals, as authorized by the Quimby Act , Government L Code Section 65477 . Section T: Aesthetics and Views. Comment 45 (Page T--2) : The project involves the development of some low--lying hillsides . However, the dominant visual features, Mount Diablo and other major ridges to the west, will not be affected and will visually dwarf the development . Further, as noted in Comment 3 , the question of whether the project will have a significant and unavoidable adverse visual impact is a decision to be made by the City Council as lead agency. Accordingly, the discussion under the heading "Level of Significance" should be expanded as follows : The design measures incorporated in the project Master Plan and Grading Plan will 45 ensure the development of an attractive, open environment. The predominant visual features, the view of Mount Diablo and other ridges to the west, will not be affected by { the project . However, the project will entail an irreversible and substantial change in the visual character of the site, resulting from the conversion of the site from open space to urban uses, and the alterations to hillsides and ridge tops . The adverse nature of this change is a subjective issue. Many viewers may find that the new character of the site, although -� changed, is substantially as attractive as Mark Jackson March 31 , 1992 Page 15 before. To others, the change may be considered a significant adverse impact notwithstanding the implementation of the mitigation measures . As lead agency, the City Council must determined whether this impact is considered significant and adverse after mitigation. s Comment 46 (Page T-5) : The significant and adverse character of the visual impact of cumulative development is similarly subjective. Accordingly, the discussion under the heading "Level of Significance" should be revised to read as follows: Appropriate design measures incorporated in individual projects should result in the development of an attractive urban 46 environment . Many viewers may find this ` environment as attractive, althoucxh different , as before the development .. However, others may find the change to the existing scene is significantly and unavoidably adverse. As this is a subjective matter, the significant and adverse character of the alteration of the I project site is for the determination of the L City Council as lead agency. Section U: Cultural Resources. Comment 47 (Pages U-1 through U-13) : The EIR concludes that loss or damage to the Brentwood Coal Mine site would be a significant impact. One basis for this conclusion is that the engine platform is the last surviving resource of its type . This is inconsistent with the text of the EIR on pages U-4 through U-5, which note that there are similar structures at Somerville and Nortonville. Accordingly, the EIR should clarify that the removal of the platform would not mean the loss of a unique artifact . 47 Another basis for the conclusion of significance is. the association of the mine with the founding of Brentwood. The site was part of the Rancho de los Meganos, the northwest corner of which was sold to become the original town site. However, the mere fact that this site and the coal mine town site were at one time owned by the same person does not indicate that the mine itself was critical to the town' s Mark Jackson March 31 , 1992 Page 16 founding. The principal mine in the region, the Black Diamond Mines , is already preserved in a National Register historic district . 47 Given that the'most important mine in the vicinity is preserved, there is little or no basis to conclude that the remaining artifacts from the Brentwood mine are of significant importance . Accordingly, we recommend that the text under the heading "Level of Significance" on page U-13 be revised to read as fellows) : "This impact is not considered significant . " The last sentence under the discussion of impact A on page U--11 should be deleted. Section V: Alternatives to the Proposed Project. Comment 48 (Page .V--5_) : To clarify the Project ' s relationship to existing utilities and infrastructure, the following text should be substituted for the last sentence of the sixth bullet : 48 The project site is close to areas currently served by utilities and other infrastructure. Accordingly, development of this site will entail a logical extension of those utilities and infrastructure . Section Y: Growth--Inducinq_Impacts . Co m.ent 49 (Page Y-1) : The last sentence under the leading "Public Land Use Policy Considerations" should be 49 clarified to read as follows : "The Project site does, however , abut the city limits along a portion of its northeastern boundaries . " Appendix 2: Sources Consulted. 50 Comment 50 : The bibliography should include Land Manning Consultants, Brentwood Unified School District, and A.G. Spanos Land Development Company. Mark Jackson March 31 , 1992 Rage 17 Thank you for the opportunity to comment on this draft EiR. if you have any questions, please do not hesitate to call Daniel J. Curtin, Jr . or me. Very truly yours, s` McCUTCHEN, DOYLE, BROWN & ENERSEN By Ann R. Danforth t 60979 Enclosures cc: James Panagopoulos (by facsimile) Donn C. Reiners William Barbour (by facsimile) James Stedman Daniel J. Curtin, Jr. 1 i r tFPv�...— C7{.. ASSOCIATES, .,.:.�'C 42114 PVQC I=a=-, 4 cwte,CA 9�5 {r.t6? Mn Tim Pa='-'-qPotJoS A. G. Span= 1341 We*t. Robiawood Dt~ve Stcxk� Czlifo.. 95207 Subject: I3raf,,, E=vjro==ta J=pact Report - :Brenfwa, dd MUs Count.�, ClabF $re=twood, C21iforda : it. r. 1z,-cpoulos. At you-' reqUe-st, S have reviewed the saction of tae H. aciar=ing and inid=adca =ease.--s r� to cad. ltrees ou the prciec," site. The =Luigmtloa mw-si,--.,s ide—itif-Led ia the EM, in-4udk thl e of teaks oa a to one xado (5- cr 15-gam cctt cr sto ic), � tical of rte«ssres ci;s{.a adect:�.: by lc� Ie2d agcacies. I base. this stes.,� on my ir�; siz-tm=t with Cit?zzli Co=tY a-ep ics wbiub have apar vcd dcvelopm=tproj=ts with sach-mitr.=zdo-,L If you h ve any cue�nns, pL s4 coat me at (9?6) 732-2050_ Sin==Ty' . -. . ,4 . . Tames C. Gioson. Senior Vice Prtsidzat Huffman & Associates, Inc. 3CG.bjs i 9 Ces s, z.Z4--,Cir–"Saar ttC L=s�.CA t::57 r CU.)9:s-zoo6 r Wvs„,x=*.N-V th- L---Ml(SMI s o- RESPONSES TO McCUTCHEN, DOYLE, BROWN & ENERSEN, ANN R. DANFORTH. LETTER DATED MARCH 31, 1992. Response l Comment noted. The Applicant's name has been deleted from the project name. Response 2 City staff has taken the position that the project's impacts on oak trees can be mitigated to a less than significant level if Mitigation Measures F,l,a through F,1,e are adopted and provided each oak tree removed is replaced with a 48-inch box blue oak tree with a canopy width of 7-8 feet and a height of 14-16 feet at locations to be approved by the City. Mitigation Measure F,l,f has, therefore, been added to this final EIR requiring the 48-inch box trees. Response 3 r The draft EIR states clearly in Section T, page T-1, that aesthetics/visual impacts is a subjective issue. The Planning Commission and City Council are currently developing hillside grading standards for development in the hills west of Brentwood. These standards, once developed, would be incorporated into the PD regulations for the project site. The standards will reflect the aesthetic standards of the community and, therefore, once applied to the project would lessen the potential visual/aesthetic impact related to hillside development to a level of insignificance. Mitigation Measure T,l,c reflecting the development and application of hillside grading standards has been added to the summary section of this final EIR. Response 4 With the addition of Mitigation Measures F,I,f and T,I,c, the loss and endangerment of oak trees and the alteration of hillside topography can be mirigated to a less than significant level. Section 15125 of the State CEQA Guidelines states that an EIR "shall discuss any ! inconsistencies between the proposed project and applicable general plans and regional plans". Appendix G of the Guidelines states that a project will normally have a significant effect on the environment if it will "Conflict with adopted environmental plans and goals of the community where it is located.," Response 5 Based upon the discussion on pages C-9 through C-11 of the draft EIR, the location of the elementary school site is a potentially significant impact. Based Michael Paoli and Associates C-77 ............. upon response letters from the Brentwood Union School District, Mitigation Measures 5,a through 5,d have been added to this final EIR. Response 6 Mitigation Measure N,3,f has been reworded in the final EIR as follows: Access for maintenance of the towers and conductors shall be provided in accordance with Public Utilities Commission and PG&E requirements. Mitigation Measure N,3,g has also been modified as follows: Protection for tower footings shall be provided in accordance with Public Utilities Commission and PG&E requirements. Response 7 Substantial grading of the hilltop areas is proposed. Therefore, it is likely that if cut materials are used to stabilize slopes, some will originate from these hilltop areas. Response With the addition of Mitigation Measure F,I,e (see Response 2), the "no" under the heading "Reducible to Insignificance" has been changed to a "yes" in this final EIR. Response 9 The suggested text has been added to Impact G,2 in this final EIR. Response 10 Seventy feet from the roadway centerline is the correct distance for the sound wall. However, any residential structure would need to be 20 feet from the sound wall, phich would place the residential structure 90 feet from the roadway centerline. .-Mitigation Measure 1,1,a has been modified accordingly in this final EIR. Response I I The City Public Works Department has indicated that two new water storage reservoirs are needed. (Refer also to Response 2 to City of Brentwood Public Works Memorandum dated March 31, 1992.) C-78 Michael Paoli and Associates Response 12 Regarding the fourth and fifth gullets under Mitigation Measure K,1,a, the Public Works Department did not take exception with the wording of these items in its comments on the draft EIR. For Mitigation Measure K,l,c in the draft EIR (which has been renumbered to Mitigation Measure K,l,d in this final EIR), the words "westerly on Balfour Road" have been replaced by "as required by ECOID". s Response 13 This has been corrected in this final EIR and is noted in the errata section of this document. Response 14 This has been corrected in this final EIR and is noted in the errata section of this document. Response 15 City staff concurs with the wording of Mitigation Measure N,4,a with the addition of language as noted in Response 7 to the Brentwood Public Works Department Memorandum dated March 31, 1992. Response 16 Since Mitigation Measure Q,I,c is structured around the establishment of a Community Facilities District, adding the language "or other appropriate funding vehicles" appears inappropriate. Response 17 See Response 3. Response. 18 i See Response 3. Response 19 The impact on oak trees has been deleted as a significant unavoidable impact with the addition of Mitigation Measure F,l,e (see Response 2). The aesthetic/visual impact item has not been removed as a significant unavoidable impact (see Response 3). The loss of the coal mine has been removed from the list of Michael Paoli and Associates C-79 significant unavoidable impacts—not because its loss would not be significant, but because its loss is not unavoidable with the implementation of Mitigation Measures U,l,a through U,l,d (see Response 47). Response 20 The No Hillside Development and Reduced Number of Dwelling Units alternative would allow for 866 single family units on the Spanos-owned portion of the project site as opposed to the 1,051 single family units proposed for the Spanos- owned portion of the site under the proposed project. This amounts to a difference of 185 single family units. The PEC area designated in the General Plan for the northeast corner of the site was assumed to include 353 multiple family units. Therefore, the total number of units included in Variation A of this alternative is 1,219, as opposed to 1,622 for the proposed project. This is a reduction of 402 units and not 756 units as stated in the comment. In order to clarify the number of units allowed by this alternative, additional explanatory text has been added to the bulleted description of the alternative in the summary. Response 21 No changes to this text are considered to be necessary because it reflects Goal l and Objective 1.1 of the preliminary General Plan update land use element (see Appendix C-1 of the draft EIR). Response 22 According to.City staff, the Apple Hill development is one-half mile from the project site. Response 23 The project site is within the County's Urban Limit Line. This is stated on page Y-2 of the draft EIR. Response 24 The text of the subject paragraph is accurate and appropriate as printed and does .-not require any qualification. The potential buildout population of the General Plan update is previously mentioned on page C-1. Response 25 See Response 5. C-80 Michael Paoli and Associates Response 26 See Response 3. Response 27 See Response 4. Response 28 No chances to the discussion of Residential Policy 1 on page C-18 are necessary. However, with the addition of Mitigation Measures F,1,f and T,I,c related to oat: trees and the alteration of hill topography, the impacts causing the project to be potentially inconsistent with the General Plan policy can be reduced to a level of insignificance. Inconsistency with the policy is, therefore, not considered to be a significant unavoidable impact and the EIR summary has been changed accordingly. Response 29 Due to the potential loss and potential endangerment of oak trees on the project site and the substantial development and grading of the hilltop areas, the project was considered to be potentially inconsistent with objective 5.3. However, with the addition of Mitigation Measures F,I,f and T,l,c and since the Brentwood General Plain update is preliminary and unadopted, this impact is not considered significant. Response 30 See Response 3. Response 31 The text in question accurately and adequately describes the relationship of the project to Government Code Section 56377(b). Response 32 The following sentence can be added to the subject paragraph: In order for the City of Brentwood to reach a papulation of between 73,000 and 107,000, it is likely that the project would be built. Michael Paoli and Associates C-81 Response 33 The purpose of Section D in the draft EIR is to evaluate the project's impacts on agricultural resources and not to conduct an overall cost-benefit analysis of the project. Development of the project will result in a net loss in agricultural production in Contra Costa County and in the economic value of this production. Response 34 The suggested text understates the incremental impact of the project. White the cumulative conversion of agricultural land would remain significant without the project, the proposed project, with 751 acres, involves a considerable amount of land and, on an incremental basis,adds significantly to this impact. Response 35 See Response 2. Response 36 The suggested text understates the incremental impact of the project. tiVhile the cumulative loss of biotic resources would remain significant without the project, the proposed project, with 751 acres, involves a considerable amount of land and, on an incremental basis, adds significantly to this impact. Response 37 The suggested text understates the incremental impact of the project. While the cumulative traffic impact on regional roadways would remain significant without the project, the proposed project would contribute up to 8 percent additional traffic on the roadways, which adds significantly to the cumulative conditions. Response 38 See Responses 11 and 12. Response 39 According to PG&E, there is one line of towers on the project site carrying 230 kV on each of two circuits. Each circuit is composed on three wires. Therefore, the towers carry two sets of wires and each set carries 230 kV. Response 40 See Response 6. C-$2 Michael Paoli and Associates Response 41 See Response 15. Response 42 See Response 11. Response 43 The reference to Section 66577 is noted and has been added to Mitigation Measure R,2,a in the summary section of this final EIR. Response 44 See Response 43. Response 45 See Response 3. It is noted that the major ridges and Mount Diablo are significant visual features in the area. However, the lower-lying hillsides on the project site are also visually very evident from Brentwood and the surrounding area, and the alterations that will occur to these hills with development of the project will also be very evident. Response 46 See Response 3. Response 47 No comparable resources were identified in Contra Costa County or California during the consultation and historical research process. The partial remains of a sandstone engine platform and a collapsed red brick engine platform in the Black Diamond Mines District were cited as the only known resources of this type. The Brentwood Mine engine platform is the last surviving and best example of its type based on this research. Its integrity, workmanship, materials, and associated mine shaft features and artifacts contribute to the importance of the historic coal mining theme identified as nationally important by the acceptance of the Black Diamond Mines District. In 1871, lames T. Sanford purchased the 13,316-acre land grant called Rancho Los Meganos established by pioneer John Marsh in 1837. The Brentwood Coal Company was formed by a group of investors a year after the property was purchased. Expensive improvements at the mine indicate that coal was the primary investment opportunity on the property. Sanford sold the northeast corner Michael Paoli and Associates C-83 of the huge estate to the San Pablo and Tulare Railroad Company in 1877. This became the townsite for the City of Brentwood. The importance of the coal industry to the development of the area is recognized in the historical literature, and by the current President and Board of Directors of the East Contra Costa Historical Society (Sherfy, pers. comm., 1992). Coal mining attracted settlers to the area and led to the development of the railroads and nearby towns. The Black Diamond Mines District contains an estimated four-fifths of the largest coal mining area in California. Over the years, fires, resettlement, sand mining, ranching activities, and vandalism have destroyed most of the buildings and structures associated with the mines and mining towns in this area. According to the National Register nomination for the district, „most of the district's [extant] features are underground, in the form of mining excavations" (Praetzellis, 1989). As visible, above ground coal mining structures, the Brentwood site's engine platform with its sandstone masonry, anchor bolts, and associated Cornish pump foundation, are important resources that contribute to the National Register coal mining theme. The recently vandalized round sandstone feature adjacent to the engine platform may have been a foundation for the engine smoke stack. Subsurface archaeological resources on the site, including structural features in the mine shaft and domestic artifactual remains, may provide important information about how the mine was constructed and who worked there. Considering the relatively undisturbed condition of the mine site and its potential contribution to the social history of East Contra Costa County, loss of this resource would be a significant adverse impact as defined by Appendix K of the California Environmental Quality Act Guidelines. Response 48 The purpose of the sixth bullet is to indicate that the City has identified the site for potential future annexation and in order to annex the site, extension of urban services to the site should be feasible. Any further modification to the text is unnecessary. Response 49 Clarification noted. le •'Response 50 The Brentwood Union School District and Land Planning Consultants are already listed under Schools in Appendix 2. The A. G. Spanos Land Development Company should have been included in the Sources Consulted and is so noted in the errata section of this final E1R. C-84 Michael Paoli and Associates MCCUTCHEN, DOYLE, BROWN 6 ENERSEN SAN rRANCtSCO COUNSELORS AT LAW wAswINGr ON. OC LOS ANCCLCS 1331 NORTH C.ALIrORWA BOULCVARO SAN JOSE POST OFrICE SOx V WALNUT CRCCK WALNUT CRECK, CALIr0 Rft1A 04596 ArrILIArCO OrIlCC TELEPHONE (510) 937.6000 4ANG40X rACSIMILE (510) 975-5390 April 7 , 1992 014rCT DIAL «V-Oco HAND DELIVERED Planning Commission City of Brentwood City Hail 708 Third Street Brentwood, CA 94513 Brentwood Hills Country Club Draft Environmental Impact Report Our File No . 72748-002 Gentlemen: We represent A.C. Spanos Land Company in connection with the Brentwood Hills Country Club proposal currently under consideration by the City. We have submitted a detailed set of comments on the draft EIR to City staff and will not repeat these comments here. There are, however, several additional points that we wish to highlight in connection with tonight' s Rearing. A. Municipal Golf Course. As the EIR describes in detail, the Project is a mixed-use development, with residential, recreational , and commercial/Planned Employment Center uses. The .Project ' s physical components have not changed since the preparation of the draft EIR, but there is one new development that may merit mention in the final E"R -- the current joint efforts by the City and Spanos to develop the Project' s golf course as a City-owned amenity. We note that the municipal golf course would be a benefit to the City without any environmental downside. In fact, it may ease some concerns that have been raised. For example, there have been concerns relating to private ownership Planning Conmission City of Brentwood April 7 , 1992 Page 2 of the facility because of the detention basins proposed to be located on site. Conveyance of the golf course land to the City would completely avoid any conflict between private maintenance of the land and the public flood control functions . B . Conversion of Vacant Land. The EIR identifies the conversion of vacant land to urban uses as a significant impact. However , the City' s General Plan contemplates such conversion in its land use planning. The Project will also advance and implement the City' s Planned Employment Center goals, objectives and policies . C. Public Infrastructure. The EIR discusses the anticipated infrastructure needs of the region at some length. Mitigation measures proposed for this Project include traffic impact fees, limited traffic studies during the implementation of the Project and construction of water storage and wastewater treatment facilities . However , the EIR should clarify that the City' s Capital improvement Financing Program is the appropriate and exclusive mechanism to determine the level of improvements that will be required and to impose fees to fund those improvements . Traffic mitigation fees are governed by the CIFP and the July` 27, 1989 Brentwood Capital Improvement Costs and Basis of Development Fees. Pursuant to City ordinance, the City shall initiate the improvements anticipated by the CIFP, receiving mitigation fees from developers at the time of issuance of building permits . Spanos will pay its share of the cost as building permits for each phase of the Project are issued, as provided by City ordinance. No further studies or fees are appropriate or authorized. Water storage and wastewater facilities must also be covered by a CIFP under municipal law. Prior to approval of "the final map, the City shall determine and design the necessary water stor-age facilities, design the Project ' s wastewater treatment facilities and secure funding for these improvements . Water storage and transmission and wastewater treatment facilities are to be installed prior to issuance of certificates of occupancy. punning Commission City of Brentwood April 7 , 1992 Page 3 D. School Site. The EIR identifies a potential impact relating to lack of adequate access to the proposed school site and recommends that the site be moved to the west . The Project applications* contemplate that the EIR' s proposed school site be subdivided into several single-family lots . We understand that the City wishes to ensure adequate access to the school ; however , it is not necessary to move the site at this time. ' We propose that the tentative map be approved with the school site as originally proposed, subject to the condition that the developer establish to the satisfaction of the Brentwood Unified School District that the site is accessible by two full streets prior to recordation of the final map and subject to the further condition that if the developer does not establish this access , the school site shall be relocated as recommended in the draft EIR. We have submitted this proposal to the District for its consideration (see attached letter to Mr . J . Douglas Adams) . E. Electromagnetic Fields . The EIR recommends that the Final Subdivision Report include statements regarding potential hazards associated-with electromagnetic fields from high voltage transmission lines . There is no authority or need for such a requirement . As the EIR relates, the original study indicating a possible health risk from electromagnetic fields has been discredited, and attempts to duplicate that study have had mixed results . The State of California does not regulate land uses near high voltage lines except with respect to schools . Based on all of the foregoing, we oppose the proposed mitigation measure. If the City has particular concerns regarding electromagnetic fields, we recommend that a condition be imposed that in the event the State adopts standards governing human exposure to high voltage transmission lines, purchasers of all lots within the scope of said standards shall be informed of the presence of the transmission lines and the ongoing research regarding the health effects of those lines . F. Acoustical Desicn. The EIR indicates a potential noise impact on residential units located near Balfour Road, Concord Avenue and Planning Commission _ City of Brentwood Argil 7 , 1992 Pace 4 the proposed Delta Expressway. Prior to the issuance of building permits , the developer will submit to the Planning Director an acoustical analysis demonstrating that the residential units adjacent to these roadways have been designed to meet the recommended interior noise level for residential units of 45 dBA ldn. We thank you for the opportunity to comment on the draft EIR, and welcome any questions you may have on the above issues , or any other matters relating to the Brentwood Hills Country Club. Very truly yours, McCUTCHEN, DOYLE, BROWN & ENERSEN By Ann R. Danforth Aaoio 65269 Enclosure cc: James Panagopoulos (w/encl . ) William Barbour (w/enol . ) Daniel J. Curtin, Jr . (w/enol . ) RESPONSES TO McCUTCHEN, DOYLE, BROWN & ENER.SEN, Anti R. DANFORTH. LETTER DATED APRIL 7, 1992. Response 1 The current joint efforts by the City and Spanos to develop the project's golf course as a City-owned facility are noted. Although City ownership of the golf course would not change any environmental impacts of the project, it would, as..' noted in the comment, avoid any conflict between private maintenance of the land and public flood control functions. Response 2 The City's adopted General Plan contemplates the conversion of only 80 acres of the 751-acre project site to urban cues. The City's preliminary General Plan update contemplates the conversion of the entire site to urban uses; however, this plan has not been adopted. The draft EIR, in Table C-1, indicates that the project is consistent with current general plan policies related to Planned Employment Centers. Response 3 For the most part, the Capital Improvement Financing Program is the appropriate vehicle for assuring that improvements related to water storage, wastewater treatment, and traffic are provided and financed to accommodate new development. However, with respect to water supply, the Public Works Department has indicated that two water storage reservoirs are necessary to adequately serve the site and that only one is provided in the C1FP in which the Applicant has agreed to participate. Therefore, a new Mitigation Measure K,I,b has been added indicating that unless the CIFP is modified to include the construction of the second reservoir, the second reservoir would be the responsibility of the Applicant (see Response 2 to the Brentwood Public Works Department Memorandum dated March 31, 1992). Mitigation for the potential traffic impacts of a project of this magnitude is complex and involves not only dealing with local impacts but also cumulative and regional impacts. Some of the cumulative impact mitigation measures are not provided for in the CIFP. No financing mechanism has been established for regional transportation improvements and the mitigation measures in the EIR are intended to assure that the project participates in the funding of such improvements. Without developer participation in these improvements, such as the Delta Expressway and the widening of Highway 4, these facilities cannot be constructed. r Michael Paoli and Associates C-89 The requirement to do limited traffic studies as each phase of the project is developed is intended to identify the specific mitigation measures needed at a particular point in time. A project of this magnitude will be phased over a number of years and the improvements that are in place at a particular point in time will vary depending on the status of various other developments in the area. The studies will help to identify only the measures needed at the time and thus will provide for efficient timing of improvements. No new improvements would be required as a result of the studies. Response 4 See Response 5 to the March 31, 1992, letter from McCutchen, Doyle, Brown & Enersen. Response 5 The City has the authority to require the subject mitigation measure, and the need is based on a policy of "prudent avoidance" as stated in the draft EIR (page N-2) and the obligation of the City to inform residents of a potential hazard that has been receiving considerable, recent public and scientific attention. The draft EIR does not state that the original study indicating a possible health risk from electromagnetic fields has been discredited. Instead, it states "the results of this study have been questioned because of possible problems with its design". The mitigation measure proposed in the EIR is appropriate. It will ensure that prospective purchasers of lots in areas affected by the transmission lines are made aware of any potential health effects of electromagnetic radiation before they buy a lot. The information would be developed by the applicant, in conjunction with a qualified consultant, PG&E, and the City. Under the alternative mitigation measure proposed by the respondent, depending on if and when the :state adopts standards, lot purchasers may not be informed of any potential health hazards until after they own and reside on an affected lot. Response 6 r This response is consistent with Mitigation Measure 2, on page 1-12 of the draft EIR, C-90 Michael Paoli and Associates Plannin.v Commission Minutes ril 7, 1732 The Public Hearing was opened at 9:35 p.m. ,1 Jim Panagopoulos of A. G. Spanos provided a presentation regarding the history of the property. and the project, noted monies paid into the CIFP, to Brentwood Union School District,and to East Contra Costa Irrigation District.. Don Reiners, Land Planner representing A. G. Spanos, provided a presentation reviewing maps, explaining the project's skyline, foothills,and planned grading concept. 3 Tom Rogers,of Griffith Lane,commended Spanos' land offer to the City of Brentwood for a golf course and noted the positive impacts of this project. 4 Bill Bristow, ex-superintendent of Brentwood Union School District, noted concerns regarding adequate accessibility to the school site. , 5 Jim Panagopoulos stated that a condition can be placed on his project requiring two major access points to the school district. Ann Danforth,representing the applicant,addressed the issue regarding the loss of the oak trees, fi and indicated that it should not be shown as a significant loss. Ms. Danforth also noted a letter which stated that EIR contained standard mitigation measures. Ms. Danforth objected to the additional mitigation measures imposed by Staff. 7 Harry Breen of Brentwood noted the Historical Society viewed the site, and had gathered items for an exhibit at the museum. The Public Hearing on the draft EIR was closed at 10:02 p.m. The Planning Commission commented on the draft EIR and asked the following questions: 8 -Noted the cancellation of the Williamson Act contract and requested this be further clarified in the EIR regarding how the cancellation works and where the money goes upon cancellation. 9 -Requested clarification regarding the elimination and addition of the oak trees. 10. -Requested the Deer Valley Road improvements be addressed. 11 -Noted J.2 increased storm drainage run off, and requested that trash run off be addressed as mitigation for maintenance. 12 -Stated concern regarding financial impact for any additional golf courses in Brentwood. 13 -Requested clarification regarding building and access to the coal mines. 14 -Inquired regarding the refuge dump near the gun club. 15 -Discussed the proposed location of the transmission towers and lines. 16 -Discussed maintenance access roads 17 -Noted lack of parklands M/StCtU Lawrence/Neff to continue the Public Hearing on the annexation,general plan and sphere of influence amendments,and rezoning to the May 19, 1992 Planning Commission meeting. RESPONSES TO COMMENTS AT THE BRENTWOOD PLANNING COMMISSION PUBLIC HEARING HELD ON APRIL 7, 1992. Response l Mr. Panagopoulos' presentation is noted. No further response is required. Response 2 Mr. Reiners' presentation is noted. No further response is required. Response 3 Mr. Rogers' comments regarding the positive aspects of a municipal golf course on the project site are noted. Response 4 See response to Brentwood Union School District letter dated March 10, 1992. Response 5 See response to Brentwood Union School District letter dated March 10, 1992. Response 6 See Response 2 to McCutchen, Doyle, Brown & Enerson (Ann Danforth's) March 31, 1992 letter. Response 7 See responses to the East Contra Costa Historical Society letter dated April 1, 1992. Response 8 • An explanation of how the Williamson Act works, from the 1990-91 Williamson Act Status Report, California Department of Conservation, March 1992, is attached. Response 9 See Response 2 to McCutchen, Doyle, Brown & Enerson (Ann Danforth's) _Match 31, 1992 letter. C-92 Michael Paoli and Associates __ ............................................................................................................................................................................................................................................................................................................................ transportation system impacts. However, MTC staff finds that there are a number of very effective mitigation measures that the City could implement. The goal of these measures should be to reduce traffic volume impacts to no more that a few percentage points of cumulative traffic volume. In view of the substantial traffic impacts of this project, we recommend that the EIR consider them. They are: 3 • Downscaling the project; • Jobs/housing balance measures, such as timing job and resident'i'al development to maintain a balance and ensuring that housing is affordable to project worker; • Transit service links to planned and existing regional transit systems including BART; • Transportation Demand Management Programs to encourage ridesharing and heavy use of transit service; and • Developer contributions towards the funding of regional transportation system improvements Thank you for the opportunity to comment on this Draft EIR, We look forward to receiving the final document. Sincerely, - --- Susan Pultz Environmental Review Officer cc: Commissioners Weir, Schroder, and McKenna; ABAG Clearinghouse; Caltrans; BAAQMD RESPONSES TO METROPOLITAN TRANSPORTATION COMMISSION, SUSAN PULTZ. LE'T'TER. DATED MARCH 34, 1992. Response 1 The cumulative analysis discusses the impact on regional roadways, many of which cannot be mitigated without additional regional efforts that are now underway. The DEIR does indicate the potential for greater impacts if the growth projections are not realized in the employment sector. Further qualification of deterioration of traffic service levels on regional roadways would not provide significant additional information to warrant the level of effort that would be required. Response 2 The development assumptions used in the cumulative traffic impact analysis are discussed on page G-26 and in Section W of the draft EIR (Cumulative Impacts). Response 3 Several of the mitigation measures suggested in this comment are included in the DEIR: • Payment of regional mitigation fees when they are implemented (Mitigation Measure 1, page G-25); • Coordination with area transit agencies and the City to extend existing transit routes to the project site (Mitigation Measure 2 on page G-26). The following mitigation measure (G,3,c) has been added to the summary section of this final EIR to alleviate regional impacts: • The Planned Employment Center area shall have a Transportation Demand Management ('ITDIvf) program and a coordinator which will provide information on transit and help set up ridesharing arrangements. This system should have achievable goals and objectives consistent with future ordinances the City may implement. C-42 Michael Paoli and Associates Joint Exercise of Powers Agency 4 BYPASS AUTH©PITY ` City of Andxh City of Bmn.Wood Cx'nty of Cow-'.'a Comma March 25, 1592 Mark Jackson 2 1 1992 Planning Department 708 Third Street UI or af�Ex�trct� COMMUNITY DMlOPu£Nt DEPT. Brentwood, CA 94513 Pile: Review:Brentwood Dear Mr. Jackson: We have reviewed the Brentwood Hills Country Club/Spanos Draft Environmental Impact Report (DEIR) and have the following comments and concerns: 1. Balfour Road is one of the four proposed east-west connectors for the Delta Expressway and will be a major access point to the Delta Expressway. Therefore, .� impacts and mitigations should be carefully addressed. Right of way for the ultimate configuration of six lanes should be provided to assure adequate capacity for proposed development. Access should be limited to a minimum of 800 foot intervals to assure that weaving and merging of traffic is minimized and that traffic signal timing is optimum. 2. The preferred alternative for the Delta Expressway/Balfour Road interchange is a partial cloverleaf configuration, which was approved by the Planning Commission with the Blackhawk Nunn Project. However, Figures B-5 and B-6 in the DEIR show a diamond interchange. Although traffic volumes projected for years 2005 and 2010 can be adequately accommodated with a tight diamond interchange, . changes in the general plan contemplated for this area, such as this project, the A.G. Spanos project, and other land use changes, which may include commercial and office development, will warrant a higher capacity interchange such as a partial cloverleaf interchange. The Technical Advisory Committee to the State Route 4 Bypass Authority has recommended setting aside right of way for this future interchange configuration to allow for construction in the future with a minimum amount of disruption to the existing land uses. Also, this will eliminate significantly higher costs of relocation and acquisition in the future. 3. The New Concord Avenue alignment shown on Figure B-5 is located unacceptably close to the Delta Expressway ramps. The City of Brentwood General Plan specifically states that no thoroughfare intersection shall be closer than 1,000 feet to a freeway onloff ramp. This is a significant impact that could affect capacity and circulation on Balfour Road, at the Delta Expressway ramps, and to the project l site. Therefore, this impact should be mitigated by modifying the site plan so that all intersections are at least 1,000 feet from the proposed Delta Expressway loop ramps. stat: Board of Dir =rs. Ex Officio: Contra Costa County Tom Torfakson,Chairman City of Lavenmre 255 GA3cfer Drive Badkira Guise Alameda County Martinez, CA 94553 fn-I Var?" 1'rr*l_ /"`nr!p W�0=1. l iq-')1PI Mr. Mark Jackson March 25, 1992 Page 2 4. All project driveways and intersections on Balfour Road should be coordinated and 4 aligned with intersections accessing the Hancock/Fairway Palms Project to keep median openings and conflicts to a minimum. 5. Most of the widening of Balfour Road should occur on the south side. The Santa 5 1~e-Pacific compressor station will make it infeasible to widen on the north side of Balfour Road. The widening of Balfour Road should be coordinated with the Bladkhawk Nunn and Hancock Projects. The Authority staff will provide the proposed alignment through the interchange area. 6. The DEIR states that this project will generate 2,904 trips during the p.m. peak hour. However, the Delta Expressway Environmental Impact Report did not consider these additional trips when planning for capacity related improvements associated with the Delta Expressway. Therefore, the project sponsor should add cumulative traffic impacts to the Delta Expressway DEIR baseline traffic data and should determine if the additional traffic from this project will warrant capacity related mitigations, in addition to those proposed for the Delta Expressway. Also, regional traffic impact fees should be collected to fund capacity improvements needed as a result of this project. See Comment 10 below. 7. The DEIR describes available transit service as either very limited or not available. 7 The proposed Delta Expressway alignment has reserved right of way in the median for future transit. How would the project sponsor encourage transit in this corridor? 8. The noise abatement measures proposed in Section I of the DEIR for noise impacts associated with cumulative traffic from the ultimate alignments of Balfour 8 Road and the Delta Expressway may not be adequate. The project sponsor should provide adequate noise'abatement measures with the Spanos Project for the cumulative traffic on the Delta Expressway and Balfour Road. 9 9. .To provide local circulation, the DEIR should analyze the need for an overpass or underpass crossing of the Delta Expressway between Balfour Read and Marsh Creek Road. 10. The State Route 4 Bypass Authority has recommended that the City of Brentwood, the City of Antioch, and the County adopt a uniform development fee to finance the Delta Expressway construction. Without this fee and the revenue it generates, 10 the Delta Expressway cannot be built. If new development does not contribute to the Delta Expressway, the impacts of regional traffic cannot be mitigated and the Cities' and County's General Plans cannot be implemented. The development should be required, as a condition of approval, to mitigate regional impacts by Mr. Mark Jackson March 25, 1992 Page 3 paying the interim regional impact fee. The developer should also, when entering into a development agreement, be required to pay the proposed mitigation fee for the construction of the Delta Expressway. If you have any questions regarding these comments, please contact me at (510) 313- 2382. Very truly yours, Lowell Tunison Senior Civil Engineer Major Projects LT:7R:peo c.secksan.13 cc. M. Shiu, Road Engineering C. Bailey, Major Projects J. Cutler, Community Development I I� RESPONSES TO JOINT EXERCISE F POWERS AGENCY, STATE ROUTE 4 BYPASS AUTHORITY, LOWELL TUNISON. LETTER DATED MARCH 25, 1992. Response 1 It is understood that the preferred configuration for the east-west connector for the proposed Delta Expressway is now Marsh Creek Road. This assumption was used in the analysis. A new mitigation measure (G,5,b) has been added in the final EIR. • Balfour Road shall have adequate right-of-way for six travel lanes between the east side and west side ramps to the Delta Expressway. Access to Balfour Road in the vicinity of the Delta Expressway is not expected to be a problem (see Response 3, below). Response 2 Comment noted. Since this report was finished, additional analysis was done relative to interchange configurations of Delta Expressway and Balfour Road. First of all, an analysis of the Delta Expressway/Balfour Road intersection as an at-grade intersection was inadvertently ornitted. This description is consistent with the proposed project as currently defined by the SR 4 Bypass Authority. This analysis showed that the at-grade intersection would be insufficient to handle the projected volumes; the levels of service would be. • A.M. Peak Hour: V/C = 1.14; LOS F • P.M. Peak Hour: V/C = 1.46; LOS F This could be adequately mitigated by a diamond interchange configuration, as analyzed in the DEIR. Ultimately, a partial cloverleaf interchange will probably be needed at this Iocation. The following mitigation measure (G,6,c) has been added to the final EIR: • The Applicant shall contribute to the cost of constructing a grade-separated interchange at the Delta Expressway and Balfour Road interchange. This funding should be accomplished through inclusion of this interchange in the regional mitigation fee now under consideration in East County. C-46 Michael Paoli and Associates Response 10 In response to this comment, the impacts on Deer Valley Road were calculated. It was found that the rural roadway LCIS on this route would be as follows under cumulative development conditions: • With Delta Expressway: A.M. Peal: Hour: LOS C P.M. Peak Hour: LOS D ' • Without Delta Expressway: A.M. Peak Hour: LOSE P.M. Peal: Hour: LOS E Details of the regional route level of service analysis are included in the appendix on file with the City of Brentwood Community Development Department. .r It is reasonable to conclude that the LOS E and LOS F conditions on Deer Valley Road and Marsh Creel: Road, rural, winding, two-lane roadways with inadequate shoulders could create an additional safety hazard, as well as additional wear and tear on the facility. Mitigation on these regional routes will emerge from regional study efforts now underway in east county. Response i I This is not expected to be a significant problem and will be handled through routine maintenance of the flood control facilities and golf course. Response 12 The financial impacts of golf courses in Brentwood is not an environmental issue and was, therefore, not discussed in the EIR. Response 13 Residential lots will not be permitted in areas where there is not at least 100 feet of soil cover over any suspected mined-out areas (Impact E,6 and Mitigation Measures E,6,a through E,6,d pertain to the mining area). If the engine platform structure and vertical mine shaft area are preserved as part of a public open space area, as recommended in Mitigation Measures U,1,a through 'U.l,d, the area shown in Figure U-6 in the draft EIR would be fenced off to prevent direct public access and a nondestructive mine-closing device would be installed in the mine shaft for public safety. Michael Paoli and Associates C-93 Response 14 The gun club and the old landfill site associated with it is outside the project site east of Concord Avenue. Response 15 The transmission towers and power lines are proposed to be relocated in the northwest portion of the project site as depicted on Figure B-4 in the draft EIR. The power lines and towers would be relocated such that the easement would abut the northern one-half of the westerly property line. The reheated easement would then angle to the east and connect to the existing alignment. Response 16 See Response 6 to McCutchen, Doyle, Brown & Enerson (Ann Danforth's) March 31, 1992 letter. Response 17 The provision of parkland is discussed Section R of the draft EIR. See also the responses to the letter from Michael W. Clark dated February 24, 1992. C-94 Michael Paoli and Associates SECTION' D DRAFT EIR ERRATA This section presents corrections to the draft EIR. This section constitutes an addendum to the EIR pursuant to Section 15164 of the Mate CEQA Guidelines and does not raise any new significant environmental effects. 3.. 1. Table-A-1, Page A-3, Public Facilities and Services, is amended to include the following: Mosquito Abatement: Contra Costa Mosquito Abatement District 2. . Ta le B-l, Page B-10, is revised to insert the following: Mosquito Abatement Contra Costa Mos uito Abatement District 3. Table E-1 , Page E-5, is corrected for the soil types listed below to read as follows: Symbol Shrink-/Swell USCF Plasticity Liquid Depth to Potential Classification Index Limit Bedrock (ft) KaC Moderate-High CL, SC 10-35 25-50 >5 Pb Moderate-High C. 10-15 25-35 0-43 20-30 35-45 43-66 KaE Moderate-Hitch SC, CL 10-35 25-50 >5 4. Pane R-1, Paragraph 6, first sentence is replaced to read as follows: The City of Brentwood awns all parks within City boundaries except Brentwood City .Park, located at Dainty and Oak Streets, which is owned and maintained by the Brentwood Recreation and Park .District through County property taxes and augmentation funds. 5. Fieure. D-2, Page D-4, has been revised to correct an error in the scale. The revised figure is included at the end of this section. Michael Paoli and.Associates D-1 6. Paze D- , last paragraph, first sentence is revised to read as follows: A Notice of Non-Renewal of the contract holding the Spanos site has been filed with Contra Costa County, and the contract is due to expire in February 1999. 7. Table A-2, Page A-31, Impact K, mitigation measure 3, last sentence, is revised to read as follows: Based upon this analysis, the City shall consider establishing a fee structure to cover these costs. 8. Table A-2, Page A-32, Impact L, mitigation measure 3, last sentence, is revised to read as follows: Based upon this analysis, the City shall consider establishing a fee structure to cover these costs. 9. Appendix 2, Page 9, is revised to add the following: PROJECT LOCATION AND DESCRIPTION A. G. Spanos Land Development Company r D-2 Michael Paoli and Associates HOW THE WILLIA.MSON ACT PROGRAM WORKS At the heart of the program is the with a county or city government, usually relationship between the landowner and with the planning department. Assuming the county or city government. They are the parcel's eligibility (see below), the joined together in a contract which each application is routinely processed and agrees to give up specific benefits in return approved. The contract signed by the for mutual gain. The landowner forgoes landowner and the local government has ' the possibility of development, or conver- an initial term of 10 years, with renewal sion of property into non-agriculture or non- occurring automatically each year. open space uses during the term of the {County governments can establish initial contract, in return for lower property taxes. contract terms for longer periods of time; The local government forgoes a portion of several use 20-year terms.} Since a its property tax revenues in return for the contract is attached to the land, it is not planning and land use advantages implicit affected by the transfer of parcel owner- in retaining rural land in agricultural or ship. other open space use. Both local government and the Eligibility landowner are voluntary participants. Whether or not to enroll in the Williamson All agricultural acreage in Califor- Act program is a decision for the county nia—whether devoted to crops or grazing board of supervisors or the city council. animals---is eligible for Williamson Act Once a program is in place in a commu- coverage. Contracts can also be extended pity, agricultural landowners have the to non-agriculture °open space`lands, a option to enroll. category which includes scenic highway corridors,wildlife habitats,wetlands, salt Generally, it is easier to enroll land ponds, and recreational lands. into the Williamson Act than to withdraw it from contractual agreement. State law {Government Code Chapter 7, revenue The other major statewide eligibility requirements concern location within an and Taxation Code Sections 421 through agricultural preserve (see below)and ` 530.5} specifies the requirements and minimum parcel size. With the intention of procedures for these and ether aspects of keeping Williamson Act parcels large the program. Following is an expanded enough to maintain agricul#ure operations, description of the major features of the state policy now calls for a 10-acre mini- program. mum for prime land and 40 acres for nonprime acreage. Local governments can and do impose additional requirements on Getting Into the Program the acceptance and retention of contracts, including larger minimum parcel sizes and An interested landowner files an other standards for the agricultural use of application for a Williamson Act contract properties. .................... .............. Land Classifications Preferential Assessment Participating acreage is classified For property tax purposes, into three land use categories: urban Williamson Act parcels are assessed prime,other prime, and nonprime. While according to the income produced by the these classifications have no bearing on land, not according to the market value contract eligibility, they are the basis for the approach(adjusted since 1979 according allocation of state subventions to local to Proposition 13 restrictions) employed for governments with Williamson Act parcels. most other types of property in California. More generally, the classifications provide Specifically, county assessors use an a means for tracking trends in the income capitalization method to determine program's acreage. The pdmeinonprime the value of contracted land. This method difference is a standard distinction based takes into account a standard interest rate, on the relative capability of a parcel for a risk factor, and the property tax rate, as growing crops and supporting grazing well as net income. Preferential assess- animals. The urban prime category ment in this manner requires the assessors includes parcels located within three miles to ignore comparable sales data(now of cities of 25,000 population or more adjusted according to a base year) as the (15,000-25,000 in some cases), basis for valuing Williamson Act property. In nearly all cases, the income Agricultural Preserves capitalization approach produces a lower assessed valuation for a parcel—and Location within an agricultural hence a smaller property tax payment— preserve is a major requirement for the than an assessment that takes into ac- enrollment and retention of Williamson Act count the market value. For some con- parcels. Either the preserve already exists tracted parcels, however,the Williamson or is created by the local government at the Act value is higher than the updated base time the contract is approved. With a year value required under Proposition 13. minimum size of 100 acres(or more Since 1979, assessors have been required according to local govemment standards), to apply the lower of the two assessments. a single preserve may contain more than one contracted parcel as well as non- contracted land. The preserve requirement Withdrawing From the is intended to serve a planning and land Program use purpose—to concentrate participating parcels in areas reserved for agriculture Terminating a contract is more and thus protect them from other uses. complex than enrolling in one. The 10- Many counties have supported this objec- year contracts are automatically renewed tive by making exclusive or other agricul- every year. Stopping this process requires tu rat zoning coincide with the preserves. deliberate action, by either the landowner t or local government to amend the original contract. The four methods for removing a Consistency means that. ') an - parcel from Williamson Act coverage are: alternative use is specified which is consis- t) nonrenewal; 2) cancellation; 3) city tern with local general plans; 2)the annexation under certain conditions; and removal of adjacent lands from agriculture 4) eminent domain. Most terminations are is not likely to result; 3) discontiguous accomplished through nonrenewal. urban development will not result; and 4) there is no nearby non-contracted land available for the afternative use. Nonrenewal A landowner with an approved Either party to the contract—the cancellation pays a penalty equal to 12.5% landowner or the local government can of the current market value of the land. initiate such an action by filing a notice of Penalty payments are deposited into the nonrenewal. The notice institutes a 9-year State's General Fund. Cancellations phase out of the contract over its remaining undergo a two-step process in which a life. Conversion of the land to a non- tentative approval by a governing board is agricultural use is delayed until the end of followed within a year by a final approval. the phase out, while the assessment is The one-year interval allows for obtaining gradually increased from the Williamson the necessary permits for the aftemative Act use value level to full market value. use. Without such pemuts and the pay- The state subvention entitlement for the ment of the penalty, the final approval is acreage represented by a nonrenewed denied. (State review and approval is not parcel ceases at the time notice is given. required for processing a cancellation, as is required for removal of parcels from the Timber Production Zone Program.) Cancellation State law limits circumstances City Protest and Annexation under which cancellation can take place. Cancellation is to be used only for"extraor- Under certain circumstances, dinary"circumstances,California courts annexation of a Williamson Act parcel by a have ruled. As compared to the phase out city automatically results in a termination of of a nonrenewal, a cancellation results in the contract without penalty. This applies immediate termination of a contract. Only to a parcel which,at the time of enrollment the landowner can apply for a cancellation, in the program,was located within one mile and only the governing board of a local of the city's boundary and with a contract government---county board of supervisors which had been protested by the city at or city council—can approve such a that time. Contracts on other parcels request. To do so,the board has to continue in force at the time of annexation. conduct a hearing on the request and Since January 1, 1991, new city protests of make certain findings. The board must find contracts have not been possible because that a specific cancellation would either be of an amendment to the Williamson Act. consistent with the intent of the Williamson Act or would be in the public interest. Eminent Domain acre for prime agriculture land within three miles of incorporated cities of Contracts are also terminated specified sizes ("urban prime"; when parcels are acquired by state or local government agencies for public improve- • One dollar($1) per acre for all other ments. Removal from Williamson Act and prime agriculture land.and agricultural preserve status is immediate, either for all or pari of a parcel,depending • Forty cents($0.40) per acre for all land, on how much of the land is taken for the ether than prime agricultural land,which public purpose. State law attempts to limit is devoted to open-space uses of such removals by denying the location of statewide significance ("nonprimel. public improvements in agricultural pre- serves based primarily on tower land casts Prime agricultural land is defined and if other lands provide feasible loca- by the Act as land having good soil charac- tions. teristics for agriculture or supporting high levels of agricultural production according to economic criteria. Open space of State Subventions statewide signdicance is defined in the Government Code as land which consti- In partial compensation for the tutes a resource whose preservation is of foregone property tax revenues resulting more than local importance for ecological, from reduced assessments on contracted economic,educational,or other purposes. lands,the state annually pays a subvention Much of the open space,or nonprime, lands under Williamson Act contract are to all participating counties and cities. Funds are allocated according to the grazing and watershed lands. acreage in urban prime, other prime, and nonprime classifications. The payments are based on annual reports of enrolled acreage filed by focal governments with the State Department of Conservation. Counties and cities do not receive subventions for land under contract which is undergoing nonrenewal,or whose value .1s as high,or higher, under the Williamson Act than it would be if it were unrestricted by contract, and therefore assessed at the Proposition 13 value. Since 1976, Open Space Subvention entitlement rates have been fixed at. • Five dollars ($5) to eight dollars ($8) per 4. _y i L t. t Lr " 1 � /1,,. , ,F }i /.,,. ----.•E, \ ,fir - •\ ` \ X `ter iiF ;ty/ ,� ,•`� .ti J ! \•�; 1 r S >v1 V- !��i�,'t f 1/„�j l.,r l�r/�. ''!•:, /;,�I ti`�o•� .,, 't I�� f�� i�!� �v i • P �`�,+{ t fir\ ,./\ \, \' \ /\.../\yr•r d/\J , •. .y,,��,,lf;i�,;i�.�t 'y..�#/.\.i/tii� ,��r ,\ �, ,1�,;f\�\�f\� y�! - � •-w�— er/� J` FI\�% I\` \ sr �"/ .��:r � fir°/t r"/ ✓jar/1�s ,� Brentwood Balfour Rd. yw'�f �,./•1,., .,�!\� �c�,,, �y� .\ � 1GJ,� /\y!\sire ,/�s./may f '"+►t 1:1! 1. p f/./! \rr\r \ '!\, \ `i y /ti. / / /. or i. !Project Area .,y fir. �y.( ,,•' 1� ; _ t ,` t..'` tf" t i rl.r/\ �; r � t4 � �' lti7;s}tr/1 `•.y� rl"�l�rr`r!` \ rJ r `. W `• + " -U Planning Area Boundary c ► Prime Farmland Grazing Land Farmland of -�-- Urban and `` Statewide importance wilt-up Land ,S ALE y Unique Farmland Other Land t� Farmland of 1 Emile ED Local Importance Source: Dept.of Conservation Base Map 6/90 • ' Michael Paoli PRIME FARMLAND IN and FIGURE D-2 Associates THE BRENTWOOD AREA TABLE OF CONTENTS Page SECTION A SUTN VMARY A - I SECTION B NOTIFICATION B - 1 SECTION C COMMENTS RECEIVED AND RESPONSES TO COMMENTS Contra Costa Resource Conservation District C - 2 Response C - 4 Contra Costa County Flood Control & Water Conservation District C - 5 Response C - 7 Land Planning Consultants, Inc. (February 26, 1992) C - 8 Response C - 10 Brentwood Union School District (March 10, 1992) C - 11 Response C - 13 Land Planning Consultants, Inc. (March 18, 1992) C - 14 Response C - 15 Brentwood Union School District (March 19, 1992) C - 16 Response C - 18 Michael W. Clary C - 19 Response C - 21 Contra Costa Mosquito Abatement District C - 22 Response C - 25 East Contra Costa Historical Society C - 26 Response C - 27 Brentwood Recreation and Park District C - 28 Response C - 29 City of Brentwood Public Works Department C - 30 Response C - 32 Califomia Department of Conservation C - 34 Response C - 36 Metropolitan Transportation Commission C - 40 Response C - 42 Joint Exercise of Powers Agency, State Route 4 Bypass Authority C - 43 Response C - 46 Contra Costa County Community Development Department C - 49 F Response C - 54 McCutchen, Doyle, Brown & Enersen (March 31, 1992) C - 59 Response C - 77 i_ Michael Paoli and Associates u I McCutchen, Doyle, Brown &, Enersen (April 7, 1992) C - 85 Response W C - 89 April 7, 1992 Planning Commission Hearing Comments C - 91 Response C - 92 SECTION D DRAFT EIR ERRATA D - I Michael Paoli and Associates SECTION A SUMMARY Tables A-1 and A-2 constitute the revised Summary section of this EIR. The revisions are shown in italics. Table A-1 provides a summary description of the proposed project in outline. form. Project maps are included for reference. . ' Table A-2 summarizes the potential adverse environmental impacts associated with the project, lists the measures that have been identified to mitigate the impacts, indicates whether the impacts can be mitigated to a level of insignificance, identifies the agency or agencies responsible for implementation of the mitigation measures, and specifies how the measures will be implemented and monitored. Table A-2 also includes a summary of the significant unavoidable impacts, a summary of unresolved or controversial issues associated with the project, and a summary of the project alternatives. Michael Paoli and Associates A-1 TABLE A-1 SUMMARY PROJECT DESCRIPTION name of Project: A. G. Spanes-Brentwood Hills Country Club Mate Clearinghouse Nt3mttr: 91013466 City of Brentuoj2d EIR .File Number: 90-2 ,?Fame of Annlic nt: A. G. Spanos Land Company, Inc. Uad Agency: City of Brentwood Resnansible Agencies: Contra Costa County Local Agency Formation Commission (LAFCO) State of California Department of Fish and Game Contra Costa County Flood Control and `Nater Conservation District East Contra Costa Irrigation District Brentwood Recreation and Park District Location of Proje-ct: Southwest corner of Balfour Road and Concord Avenue, immediately southwest of Brentwood, California Area of Project Site: 150.7 acres A_2 Michael Paoli and Associates Proposed Land Jse.s: Land s crams No. of Units Q p' ' Neibhborhood Commercial 14.7 160,100 Planned Employment Center 54.4 710,940 Cluster Residential 31.2 4201 Single Family Residential 277.4 1,202 School Site 10.0 Park Site 16.7 Day Care Center 1.5 Golf Course 211.0 Open Space 85.2 Urban Reserve 36.8 Streets and Interchange 11. TOTAL: 750.7 1,61-) 871,000 PQrpplation and Ernployment: Estimated Population: 4,957 Estimated Employment: 1,456 Public Facilities and Services: Potable Fater. City of Brentwood Irrigation Water: East Contra Costa Irrigation District Fast water: City of Brentwood Flood Ci2nLml and Drain ¢e: Contra Costa County Flood Control and Water Conservation District and City of Brentwood Solid Waste: Brentwood Disposal Service Law Enf r m nt: Brentwood Police Department F'irt Protection/Ern reencv Services: East Diablo Fire Protection District b l : Liberty Union High School District Brentwood Union School District P rks and Recr ation: Brentwood Recreation and Park District Lib-raa: Contra Costa County Public Library .ctsicitY and as: Pacific Gas and Electric Company Telephone: Pacific Bell Streets: City of Brentwood . R=uiro Abatement: Contra Costa Mosquito Abatement District Required Permits and AR royals: General Plan Amendment Zone Reclassification Preliminary and Final Development Plans Vesting Tentative Map Use Permit for Country Club Development Agement Annexation Application 89-4 Capital Improvement Financing Program Cancellation of Agricultural Preserve Contract No. 12-76 Michael Paoli and Associates A-3 LONA TREE WAY' ' LONE ; AEE � WAVct 1 I4•„ 13 It I O t _Ij •r �.:t I I c I � $unci hr U �i JCvC',v?� O,•, it i; w f j' bOKE=WNE A0VEDVCT Gran, t.+r i� �$unse£ Rax I I• _ Mtnnefgia � , Aorlcpt way .. • ! «- !w. 6t. 60. t16 M rsY Sand Creek' �eGCretkAC4 13 71�E M W 0)70?D 4 Oyu E S`r�#C6 � I� t^ I .Q .p •unis Dr� k, y tlw� .� I .� Avanue San Jose.- -' :, 'r„ '?a grodet're r Kreger p(jr. F +s I' Aandr-11 Way' t C" '.- .� -4 LIA Oo j ,; C:t . .r Ile. Brentwood City Limits t t. , .. if. � le `•.,��. �LFntrar 9t.d. `b e,rx iC►Cit+ sty,, w (" fi 't �1� C"• t� ,i .�i a •` t . +Or. \\ lorwtta}t++wn�ir�„ a �tr.wv r«etl 9' ••.%, �D��=1�tii.iGrf414L PROJECT 2 a C, '._-..�...j ut rt.S tr.. .yi�,iC lirrEr A.. a.+► ! :,ra..ci r'P .,it ,rrwomw. i st t T✓ _ C ®...o.... ? a .` <' ±, , wa,c+►,etr.ufr, Ptlet;on e: afK•►frt �Y r�OA*w:SCHOOL BALFOUR ROAD ` ;-e 8ALF0t1R ROAD — •eoa C ArWrnan trsa.r H•r.r\D ; MMro+te`� ►trti,f' to 4A r ►rrymf�grfµit _ ..•---'"."""' 3 l moi• sum,Al a > ��i�,,r�. C.Ot3trrttfliQ vv Avenue [ D,ry Cretj � CJ .. ,� 1 !/ •..Egxt Contra Coate w lr.itation patrret - .4 Eureka Avtnut Eureka Avtnut -! Payne ! Avtnut Pavnt Avenue y 4` 8 d aciones . Kone®rd- _ .. .. Avtnut Concord • Avenue r 1,r—= Approx. 1/2 Mle Michael Paoli and GENERAL LOCATION Associates t 5 i! •4��� f �lit,�tr+>as }ri to « mu . 1 o 72 i - ! 74 > n li « + a s � •• y a �� ty} til r 1 t ys �.y � y ., a s tq,���t' �� ''� � ,•. .r � � .r• w\ 4 �ti1! tit Ix 0 �J � *^ h� ,�t���.. i' r.t !v+4, � v"'{r i',y `` ,.•4, �, r it � , .P1t.� yi . . ,�. lin 1 )CO'� i A L,�`` �.ice` ✓ a. ,^ �i tt !"� .+,;���^• f XIS;ING SPHSPS OF INFLUENCE Balfour {Road1.J '�.t����..L.��� ♦/ lV JV I V�f lV tAt\1V,rV J`fj�.t yyy `V/V�V,VI\ \;lVl�`�JV!</V 1V{+�►�� Concord �V \ \ V i V \ ♦ \ \ A V V r <7 Av 4n LiV.Y Area r ! !Vr\r♦r\t♦11V i\/♦/\/♦tE/\!♦/♦1\f 6 y� . yy� \ \1`f`l;IV ♦ \ *� j A _V I\f♦f♦r\r\!<IV!At / J 1 y i J ♦!A!\IV101 d♦I♦r~fVl f ! ! lAJ L.+r i� �\f♦J\ Vf\J\lV fV/ !\rfV tV 1V/\r♦/VYV/ 1V"41 . t!V/AfV V V 4 V f1fV A\J\f\'fV J\f\,rVi�t "l'! •� F i �}.r«'�tV JVr 1 Aj„yrFrV�'\ ♦ { V V `ii M� S.V�irVrV1V ///{}111t...J\I r / ! 11VJ<JV1A1�Vt1l►{. i TTT A V V�V}V jV fV fAr\tAJ { • EXISTING cSIN r G _ Y I.-IMI7 lA1 Vr\t♦ � + �lYir 1 f r�\J4r\f J 1 ^ p�7(�.:7 ♦ « f 1 \ ♦ ♦ ♦}Y! r„w � f♦!r ar r. i owned by Contra Costa '♦rancord c1te Flood Control. and IN Conservation District � "►'" l\ . ►.venue y •�-} Area 4 ,wlfrf rr i•� s\ +.�Aii*11�i�+�It�. '�`fA JA!♦r♦i♦!\r` �4' �, r f r I i r r J � s r J ♦iwr♦fA � �J'/\r\ ; ,���,,.�""' /\JAIA��rA/♦JA/Ar\r\/<i<�,�fA j\�\ f♦j♦r`r\�+\f\rosAiAr< \ A • • •i! iA •i iiiV \ \ ♦ A/ 01 Briox cs V project Area Boundary « t ; N 1000' N i Michael Paoli PRO.�E6T LOCATION and Associates +..fHYi�IMOYMI�� �IIfrY�PIY ��Yif�II�MII11rMIMM /JJ}}} BALFOUR ROAD y� �,i+�.yip�+wrs wry lrrr �w�i r.w rte®.war.awc.i cwrr war �r��s�ort wn.�+nom..ri wars wr�'yya ' '`` UMD os ULDGO I scx"i w�E_ { ill umo COURSE 0S �.�- J UM ULD USD � ��c � � � � o s1 FIR\os 0 cr j ULD G ULD s a °s PF 10 , x o Ns �lr ULLD I ULD A `` � � � ULD . 0s cis IDS j ULD '' GC ULLD GOLF COURSE PEC j in S �j D CSS �/ ,� -. � � ULD� � 0 cl ULD ULD II CL OS ' CALF COURSE ULD , .. ULD pS `I ULD ,US _ � ,�'► UR os GOLF COURSE ULLD --''�` BI IONF-i LEGEND ACRES --`' �- ULLD URBAN LOW-LOW 25.8`AC r ULD URBAN LOW 226.0=AC f umo URBAN MODERATE 36.9=AC UHD URBAN HIGH 19.9=AC NC NEIGHBORHOOD COMMERCIAL 14.7=AC (}S PEC PLANNED EMPLOYMENT CENTER 54.4=AC PF PUBLIC FACILITY ow I t.5_AC S SCHOOL 10.0=AC OS OPEN SPACE. 296.2=AC PR PARK/RECREATION 16.7=AC t UR URBAN RESERVE 36.8=AC ROADS t 1.8=AC TOTAL 750=7-AC GENERAL PLAN LAND � ll � R 9 1 N 9 oo«N c USE CATEGORIES � � � SEPTEMBER 1901 A. 0. SPANDS COMPANY INC. CITY OF BRENTWOOD,CALIFORNIA ee•xs .................. $> ru tit CA < a !! cn tn Cj 0 a E u z E 04 CL 0 cl tn fu N . Jut >, to Q fj CZ u u rz z to ej.= cn.- 44 41 cc ca czxn:3 96 43 :3 ra r= ts . 2 80 80 .; - V >% C to= c cc 4> CL ed to r.6 es 10 Ril cl; 10 10 M V w i1} y�( �.y� w. .,�M5�a,.F�,,w,yi�}►..iV,w�}}J� '�+� �C{.y��1 rL'r r» 4�i+Y y Vr�'�'C's�Y Yw' �.w "'�+� r�,,,�, ttk •V.y �{ � r� VAr V OJ " i� �y"'GS.�. (jlAAzi CIO- a. 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" t 2j: { v ' vi 0 r, S �' 1iC7 C .� its t3 G► ' `" ''rJ � � ✓, Com?�,"'"G �v Q ��, rte. oU Y 7 to � r v+w;a 6Vol i r� v DC7 ' c� e 7 oll �"vs CA CJ`sta F '" iva j wi vs `G• Y "SCS'�'."s' "� et+�`G � ��w-'�� � r°„g a Cj i c o q e a C 21 ej CA 7,v tn ECL U ¢ a'a 3 1yu, ate+ � �. c`1,•� c�6 e� C,�.�'> v �v a 3 '> JL FL " a+. v � "' � r1 � C v � � OYy �,,,a��, as �•�, r S > E ...� is J `y A� �.�` p � � 4•C rt a �`�"`[�..C"� � �y �� �a�y� rt +� z,.�•� �wb C y vu== 3rs � > 1, q uCJ.v� r: i U4 o ~a a C varsa > cz sC�l c`t s SCJ COW ro u es rv- erg 3 IM y v cM�.r�s -Cys tz e>, Jam ' oy.caH zs Cca W`t, c-ov c c t 04 =3 W a� a fj tn L6 C4 ca -- °" 41 5 lull u ul VI. L 4.) o ' .tn.# Q r4- cy oa c res a a5t,?' +� a_. s t atj 03 ej CS. ft ac� c_:= , ea acs tn Bt ej ra 1- 0 hCiC7'E w6wo t� U'u7 CA V < v� a is U a CL. 0 a 1 a v v CIO W C cn c • z 1 N4 W Sr.. /.t C.1 '� •7 �"3 "' GJ':7 C,�"", V �..O.Vs.O'yS V N y�� t1 r. GY w CN cn tt © L"T, O V A C sn.4m cv O O ori U VS tj Zn C1 O < H!.O �A `4 Vi 'L lz (,^) ::.aej CS 4 C3 U w et tA CA G §j j v 6).0 C�3 —0 C4J •O r tt! .�. .�` to n '1. Ilraf� Environmental Impact`: Report A. G. Spanos Brentwood Hills Country Club State Clearinghouse Number 91013066 City of Brentwood EIR File No. 90-2 Prepared for: City of Brentwood 708 Third Street Brentwood, California 94513 (510) 634-6905 Prepared by: Michael Paoli and Associates Environmental, School Facility, and City Planning 600 West Shaw Avenue, Suite 240 Fresno, California' 93704 (209) 224-4806 In association with: Donald Ballanti Brown-Buntin Associates, Inc. DKS Associates William P. Jordan, Ph.D. and R. James brown, Ph.D. February 1992 PREFACE This EIR presents a comprehensive assessment of the potential environmental impacts of the proposed A. G. Spanos Brentwood Hills Country Club,project. The ETR is divided into 25 sections, each of which presents information that is required or may be included in an ETR under the California Environmental Quality Act (CEQA) Guidelines. Section A presents a summary of the findings of the EIR. Section B provides a description of the project and its location. Sections C through U present the existing setting, potential impacts, and recommended mitigation measures for the project. Section V discusses alternatives to the project. Section W addresses cumulative impacts and the relationship between short-term uses and long-term productivity. Section X identifies the significant irreversible environmental changes associated with the project. Finally, in Section Y, the growth-inducing impacts of the project are described. There are eight appendices to the EIR. Appendices C-1 through U-1 provide background or technical information for resources and conditions that are addressed in the EIR. Appendix 1 lists the consultants who prepared the EIR, and Appendix 2 lists the sources that were consulted in the preparation process. Michael Paoli and Associates i TABLE OF CONTENTS Page SECTION A SUMMARY A 1 SECTION B - PROJECT LOCATION AND DESCRIPTION Project Location B - 1 Project Description B - 1 Project Phasing B - 11 Intended Uses of EIR B - 11 SECTION C LAND USE SETTING, IMPACTS, AND MI'T'IGATION MEASURES Setting C - 1 Project Impacts and Mitigation Measures C - 6 Cumulative Impacts and Mitigation Measures C - 27 SECTION D AGRICULTURAL RESOURCES SETTING, IMPACTS, AND MITIGATION MEASURES Setting D - 1 Williamson Act Contract Cancellation Findings Discussion D - 6 Project Impacts and Mitigation Measures D - 9 Cumulative Impacts and Mitigation Measures D - 12 SECTION E TOPOGRAPHY, GEOLOGY, SOILS, AND SEISMIC HAZARDS SETTING, IMPACTS, AND MITIGATION MEASURES Setting E - 1 Project Impacts and Mitigation Measures E - 8 Cumulative Impacts and Mitigation Measures E - 18 SECTION F BIOLOGICAL RESOURCES SETTING, IMPACTS, AND MITIGATION MEASURES Setting F - 1 Project Impacts and Mitigation Measures F - 10 Cumulative Impacts and Mitigation Measures F - 13 Michael Paoli and Associates ii SECTION G TRAFFIC AND TRANSPORTATION SETTING, IMPACTS, AND MITIGATION MEASURES Setting G - 1 Project Impacts and Mitigation Measures G - 13 Cumulative Impacts and Mitigation Measures G 26 SECTION H . AIR QUALITY SETTING, IMPACTS, AND MITIGATION MEASURES Setting H - 1 Project Impacts and Mitigation Measures H - 6 Cumulative Impacts and Mitigation Measures H - 13 SECTION I NOISE SETTING, IMPACTS, AND MITIGATION MEASURES Setting I - 1 Project Impacts and Mitigation Measures I - 5 Cumulative Impacts and Mitigation Measures I - 13 SECTION J STORM DRAINAGE AND FLOOD CONTROL SETTING, IMPACTS, AND MITIGATION MEASURES Setting J - 1 Project Impacts and Mitigation Measures J - 2 Cumulative Impacts and Mitigation Measures J - 5 SECTION K WATER SUPPLY SETTING, IMPACTS, AND MITIGATION MEASURES Setting K - I Project Impacts and Mitigation Measures K - 2 Cumulative Impacts and Mitigation Measures K - 3 SECTION L WASTEWATER COLLECTION, TREATMENT, AND DISPOSAL SETTING, IMPACTS, AND MITIGATION MEASURES Setting L - 1 Project Impacts and Mitigation Measures L - 2 Cumulative Impacts and Mitigation Measures L - 3 Michael Paoli and Associates iii SECTION M SOLID 'WASTE SETTING, IMPACTS, AND MITIGATION MEASURES Setting M - I Project Impacts and Mitigation Measures M - I Cumulative Impacts and Mitigation Measures M -- 3 SECTION N. HAZARDOUS CONDITIONS SETTING, IMPACTS, AND MITIGATION MEASURES Setting N - 1 Project Impacts and Mitigation Measures N - 7 Cumulative Impacts and Mitigation Measures N - 11 SECTION O LAW ENFORCEMENT SET'T'ING, IMPACTS, AND MITIGATION MEASURES Setting Q - 1 Project Impacts and Mitigation Measures O - 1 Cumulative Impacts and Mitigation Measures O - 2 SECTION P FIRE PROTECTION AND EMERGENCY SERVICES SETTING, IMPACTS, AND MITIGATION MEASURES Setting P - I Project Impacts and Mitigation Measures P - 2 Cumulative Impacts and Mitigation Measures P - 3 SECTION Q SCHOOLS SETTING, IMPACTS, AND MITIGATION MEASURES Setting Q - I Project Impacts and Mitigation Measures Q - 2 Cumulative Impacts and Mitigation Measures Q - 4 SECTION R PARKS AND RECREATION SETTING, IMPACTS, AND MITIGATION MEASURES Setting R - I Project Impacts and Mitigation Measures R - 2 Cumulative Impacts and Mitigation Measures R - 3 Michael Paoli and Associates iv SECTION S ENERGY SUPPLY AND USAGE SETTING, IMPACTS, AND MITIGATION MEASURES Setting S - 1 Project Impacts and Mitigation Measures S - 1 Cumulative Impacts and Mitigation Measures S 4 SECTION T,. AESTHETICS AND VIEWS SETTING, IMPACTS, AND MITIGATION .MEASURES Setting T - 1 Project Impacts and Mitigation Measures T - 1 Cumulative Impacts and Mitigation Measures T - 5 SECTION U CULTURAL RESOURCES SETTING, IMPACTS, AND MITIGATION MEASURES Setting U - 1 Project Impacts and Mitigation Measures U - 11 Cumulative Impacts and Mitigation Measures U - 15 SECTION V ALTERNATIVES TO THE PROPOSED PROJECT General V - 1 Description of Specific Alternatives V - 6 Identification of Environmentally Superior Alternative V - 14 SECTION W RELATIONSHIP BETWEEN SHORT-TERM USES AND LONG-TERM PRODUCTIVITY/ CUMULATIVE IMPACTS Introduction W - 1 Cumulative Development Scenario W - 1 Summary of Significant Cumulative Impacts W - 3 SECTION X SIGNIFICANT IRREVERSIBLE ENVIRON- MENTAL CHANGES X - 1 SECTION Y GROWTH-INDUCING IMPACTS Introduction Y - 1 Public Land Use Policy Considerations Y - 1 Availability of Urban Services/Infrastructure Y - 2 Geographic/Environmental Constraints Y - 3 Economic Growth in the Community Y - 3 Michael Paoli and Associates v APPENDIX C-I PRELIMINARY LAND USE ELEMENT OF THE BRENTWOOD GENERAL PLAN UPDATE APPENDIX F-1 REPRESENTATIVE BIOTA APPENDIX H-I AIR QUALITY MODELS r APPENDIX I-1 ACOUSTICAL'T'ERMINOLOGY APPENDIX I-2 FHWA HIGHWAY TRAFFIC NOISE PREDICTION MODEL INPUTS APPENDIX U-1 GOODYEAR'S SECOND REPORT APPENDIX 1 AUTHORS OF THE EIR APPENDIX 2 SOURCES CONSULTED Michael Paoli and Associates vi i LIST OF FIGURES i • Page FIGURE B-1 REGIONAL LOCATION B 2 FIGURE B-2- GENERAL LOCATION B - 3 FIGURE B-3 PROJECT LOCATION B - 4 FIGURE B-4 PLANNED DEVELOPMENT LAND USE PLAN JULY 1991 B - 5 FIGURE B-S GENERAL PLAN LAND USE CATEGORIES SEPTEMBER 1991 B - 6 FIGURE B-6 PLANNED DEVELOPMENT PROJECT PHASING (ESTIMATED) JULY 1991 B - 12 FIGURE C-1 EXISTING LAND USE C - 3 FIGURE D-1 TYPES OF SOIL ON PROJECT SITE D - 2 FIGURE D-2 PRIME FARMLAND IN THE BRENTWOOD AREA D - 4 FIGURE D-3 LANDS HELD IN AGRICULTURAL CONTRACTS D - 5 FIGURE E-1 PLANNED DEVELOPMENT TOPOGRAPHY/ PHOTOGRAPHY JULY 1991 E - 2 FIGURE E-2 GEOLOGY MAP E - 4 FIGURE E-3 REGIONAL FAULTING AND SEISMICITY E - 7 FIGURE E-4 LOCATION OF MINING AREAS E - 16 FIGURE F-1 BIOLOGICAL RESOURCES F - 5 Michael Paoli and Associates vii FIGURE G-1 REGIONAL ROAD NETWORK. G - 2 FIGURE G-2 STUDY INTERSECTIONS G - 6 FIGURE G-3 PEAK, HOUR TRAFFIC VOLUMES EXISTING CONDITIONS G - 7 FIGURE G-4 TRIP DISTRIBUTION PERCENTAGES G - 18 FIGURE G-5 PEAK. HOUR TRAFFIC VOLUMES EXISTING PLUS PROTECT G - 19 FIGURE G-6 FUTURE ROADWAY IMPROVEMENTS G - 28 FIGURE G-7 2005 CUMULATIVE WITHOUT DELTA EXPRESSWAY G - 30 FIGURE G-8 2005 CUMULATIVE WITH DELTA EXPRESSWAY G - 31 FIGURE I-1 PROJECT SITE I - 2 FIGURE I-2 HOURLY NOISE LEVELS OCTOBER 24-25, 1991 I - 3 FIGURE I-3 LAND USE COMPATIBILITY FOR COMMUNITY NOISE ENVIRONMENTS I - 7 FIGURE I-4 EXISTING PLUS PROJECT NOISE EXPOSURE CONTOURS I - 1 D FIGURE I-5 EXISTING PLUS PROJECT NOISE EXPOSURE CONTOURS I - 11 FIGURE I-6 CUMULATIVE NOISE EXPOSURE CONTOURS 'WITHOUT DELTA EXPRESSWAY I - 14 FIGURE I-7 CUMULATIVE NOISE EXPOSURE CONTOURS WITHOUT DELTA EXPRESSWAY I - 15 Michael Paoli and Associates viii FIGURE I-8 CUMULATIVE NOISE EXPOSURE CONTOURS WITH DELTA EXPRESSWAY I - 17 FIGURE I-9 CUMULATIVE NOISE EXPOSURE CONTOURS WITH DELTA EXPRESSWAY I - 18 FIGURE T-1 PROJECT SITE SELECTED VIEWS T - 6 FIGURE T-2 PROJECT SITE SELECTED VIEWS T - 7 FIGURE T-3 TENTATIVE SUBDIVISION MAP GRAVING AND DRAINAGE PLAN (NORTH) JULY 1991 T - 3 FIGURE T-4 TENTATIVE SUBDIVISION MAP GRADING AND DRAINAGE PLAN (SOUTH) JULY 1991 T - 4 FIGURE U-1 CULTURAL RESOURCES LOCATIONS WITHIN PROJECT AREA U - 2 FIGURE U-2 BLACK DIAMOND MINE ENGINE PLATFORM U - 6 FIGURE U-3 DIAGRAM OF A CORNISH PUMP WORKS U - 7 FIGURE U-4 VIEWS OF BRENTWOOD COAL MINE SITE CA-CCO-480H U - 17 FIGURE U-5 VIEWS OF THE BRICK AND CONCRETE FEATURE, CA-CCO-611 H-A U - 18 FIGURE U-6 CA-CCO-480H SITE BOUNDARY U - 12 FIGURE V-1 MODIFICATIONS REQUESTED BY THE PLANNING COMMISSION V 3 FIGURE V-2 ALTERNATIVE SITE SELECTION V - 4 Michael Paoli and Associates ix FIGURE W-1 MAJOR PROJECTS INCLUDED IN CUMULATIVE SCENARIO `Vd - 2 r Michael Paoli and Associates x LIST OF TABLES Page TABLE A-1 SUMMARY PROJECT DESCRIPTION A - 2 TABLE A-2- SUMMARY OF IMPACTS AND MITIGATION MEASURES A - 4 TABLE B-1 PUBLIC UTILITIES AND SERVICES B - 10 TABLE C-1 PROJECT CONSISTENCY WITH APPLICABLE BREN7 WOOD GENERAL PLAN LAND USE POLICIES, C - 12 TABLE C-2 PROJECT CONSISTENCY WITH APPLICABLE CONTRA COSTA COUNTY GENERAL PLAN LAND USE POLICIES C - 20 TABLE E-1 ESTIMATED SOIL PROPERTIES FOR SOILS LILLY TO BE EXCAVATED AT THE PROJECT SITE E - 5 TABLE E-2 ACTIVE AND POTENTIALLY ACTIVE FAULTS MOST LIKELY TO AFFECT THE PROJECT AREA E - 9 TABLE E-3 PROBABILI'T'Y OF EXCEEDANCE FOR MAGNITUDE E - 10 TABLE G-1 LEVEL OF SERVICE DEFINITIONS SIGNALIZED INTERSECTIONS G - g TABLE G-2 LEVEL OF SERVICE CRITERIA UNSIGNALIZED INTERSECTIONS G - 10 TABLE G-3 INTERSECTION V/C RATIOS AND LOS EXISTING CONDITIONS G - 11 TABLE G-4 ESTIMATED TRIP GENERATION BRENTWOOD COUNTRY CLUB G - 15 Michael Paoli and Associates xi TABLE G-S INTERSECTION V/C RATIOS AND LOS EXISTING PLUS PROJECT CONDITIONS G - 20 TABLE G-6 TRAFFIC IMPACT ON REGIONAL ROUTES EXISTING PLUS PROJECT G - 24 TABLE G-7 LOS SUMMARY CUMULATIVE SCENARIOS G - 32 TABLE G-8 INTERSECTION V/C RATIOS AND LOS EXISTING PLUS PROJECT CONDITIONS WITH MITIGATIONS G - 34 TABLE G-9 LOS SUMMARY - CUMULATIVE SCENARIOS EFFECT OF MITIGATIONS WITH AND WITHOUT DELTA EXPRESSWAY G - 35 TABLE G-10 REGIONAL HIGHWAY TRAFFIC LEVEL COMPARISON WITH AND WITHOUT DELTA EXPRESSWAY - PM PEAK HOUR G - 50 TABLE H-1 FEDERAL AND STATE AMBIENT AIR QUALITY STANDARDS H - 2 TABLE H-2 AIR QUALITY DATA FOR PITTSBURG AND BETHEL ISLAND 1988-1990 H - 4 TABLE H-3 EMISSION RATES FOR DIESEL- POWERED CONSTRUCTION EQUIPMENT H - 7 TABLE H-4 WORST CASE CARBON MONOXIDE CONCENTRATIONS, IN PPM H - 10 TABLE H-5 PROJECT-RELATED REGIONAL EMISSIONS IN POUNDS PER DAY H - 12 TABLE I-1 SUMMARY OF MEASURED ANENT NOISE LEVELS I - 1 TABLE I-2 COMPARISON OF FHWA MODEL TO MEASURED NOISE LEVELS I - 4 TABLE I-3 EXISTING TRAFFIC NOISE LEVELS I - 5 Michael Paoli and Associates xii TABLE I-4 CITY OF BRENTWOOD CURRENT NOISE LEVEL STANDARDS I - 6 TABLE I-5 SUBJECTIVE REACTION TO CHANGES IN NOISE LEVELS OF SIMILAR SOURCES I - TABLE I-6 - FUTURE TRAFFIC NOISE LEVELS I - 9 TABLE I-7 CONSTRUCTION EQUIPMENT NOISE I - 13 TABLE M-1 SOLID WASTE GENERATION FACTORS FOR CONTRA COSTA COUNTY M - 2 TABLE Q-1 BRENTWOOD UNION ANIS LIBERTY UNION HIGH SCHOOL DISTRICTS CAPACITIES AND ENROLLMENTS AS OF OCTOBER 1991 Q - 3 TABLE Q-2 TOTAL STUDENTS GENERATED BY PROJECT Q - 3 TABLE S-1 ENERGY DEMAND S - 2 Michael Paoli and Associates xiii SECTION A SUMMARY Tables A-1 and A-2 constitute the summary section of this EIR. Table A-i provides a summary description of the proposed project in outline form. Table A-2 summarizes the potential adverse environmental impacts associated with the project, the measures that have been identified to mitigate the impacts, and whether the impacts can be mitigated to a level of insignificance. Table A-2 also includes a summary of the significant unavoidable impacts, a summary of unresolved or controversial issues associated with the project, and a summary of the project alternatives. Michael Paoli and Associates A-1 TABLE A-1 SUMMARY PROJECT DESCRIPTION Name_gf ftto . A. G. Spanos Brentwood Hills Country Club 91013066 City aL Brentwood ETR Fite Number. 90-2 Name__of Audlican,tt A. G. Spanos Land Company, Inc. Lend Agency: City of Brentwood R.gaI2211sibleAgencies: Contra Costa County Local Agency Formation Commission (LAFCO) State of California Department of Fish and Game Contra Costa County Flood Control and Water Conservation District East Contra Costa Irrigation District Brentwood Recreation and Park District Logatian of Project: Southwest corner of Balfour Road and Concord Avenue, immediately southwest of Brentwood, California Area g[ 1!rg.jet S, it 750.7 acres A-2 Michael Paoli and Associates Pro2osed ..Lang 1ses: Land UsQ Acres No, of Units Sg. Footage Neighborhood Commercial 14.7 160,100 Planned Employment Center 54.4 710,900 Cluster Residential 31.2 420 Single Family Residential 277.4 1,202 School Site 10.0 Park Site - 1.6.7 Day Care Center 1.5 ' Golf Course 211.0 Open Space 85.2 Urban Reserve 36.8 Stm,,.ets and Interchange 11.8 TOTAL: 750.7 1,622 871,000 Powtio13 jUd Emnlovm n : Estimated Population: 4,957 Estimated Employment: 1,456 Public Facilities an Services: Polable Water- City of Brentwood Im ation Nater: East Contra Costa Irrigation District Msmw w: City of Brentwood Flood Control and Dra nate: Contra Costa County Flood Control and Water Conservation District and City of Brentwood Solid Wa : Brentwood Disposal Service Lave En fQrce ,ment: Brentwood Police Department Eire-Protection/rnefgengy Serves: East Diablo Fire Protection District Schools: Liberty Union High School District Brentwood Union School District Park-s-and Recreation: Brentwood Recreation and Park District L Contra Costa County Public Library Electricity and Cas: Pacific Gas and Electric Company IQI=i}on : Pacific Bell Streets- City of Brentwood :wired Permits I d App '.als: General Plan Amendment Zone Reclassification Preliminary and Final Development Plans Vesting Tentative Map Use Permit for Country Club Development Agreement Annexation Application 89-4 Capital Improvement Financing Program Cancellation of Agricultural Preserve Contract No. 12-76 Michael Paoli and Associates A-3 SECTION B PROJECT LOCATION AND DESCRIPTION 1 , pBOJECT �C).. .ATIQ The project site is composed of 751 acres located at the southwest corner of Balfour Road and Concord Avenue, immediately southwest of the City of Brentwood, Contra Costa County, California (see Figures B-1 and B-2). Brentwood, located along State Highway 4 in the eastern portion of Contra Costa County, has an estimated population of 8,255 (State Rept. of Finance, 1991). Portions of the east and north boundaries of the project site are adjacent to the current City limits. Approximately 577 acres of the 751-acre project site are owned by the Applicant, A. G. Spanos Land Company, Inc. (see Figure B-3). The remaining 174 acres within the project area are under separate ownership, including 144 acres located'between the Spanos property and Concord Avenue and about 30 acres which are owned by the Contra Costa County Flood Control and Water Conservation District. Although not owned by the A. G. Spanos Land Company, this land has been included in the land use plan to demonstrate a potential integrated master plan for the entire project area. -1 The location of the project site can be described further as Section 22 and a portion of the north half of Section 27 (part of the Los Meganos land grant) of Township 1, Range 2 Bast on the 7.5' Brentwood, California United States Geological Survey map (1978). 2. a. General The 751.-acre project site will include residential, commercial, educational, and open space uses (see Figures B-4 and B-5). Approximately 313 acres (42 percent) of the project site will be in open space (golf course, open space., parks); 309 acres (41 percent) in low, medium, and high density residential uses, E9 acres (9 percent) in commercial or office uses; 37 acres (5 percent) in urban reserve; 11.5 acres (less than 2 percent) in educational use (school and day care center); and 12 acres (less than 2 percent) in major streets and interchanges. Open space and residential uses will occupy 622 acres, or B'tFor purposes of clarity, the 577 acres encompassing the Spanos project will be referred to as the "Spanos site", the additional acres that are being included in the project, excepting the Flood Control District property, will be,referred to as the"Concord Avenue area",and tate total of 751 acres that will be addressed in this draft EIR will be referred to as the"project site"or"project area". All of the project site is proposed for annexation by the City of Brentwood except for the 37-acre portion of the project site proposed to be designated as Urban Reserve. Michael Paoli and Associates B-1 ,�s►���'M�o Nt'TOeo+14+a WOO jos a Sfl��'�Cous�rl WNW rs�+r " . NM Vaa i i1«+�+uas �n•w..� 'CCI tpo i M q 'FQ llDVla "r' yo** t. S,L tw00i A+ i TO OOD EAK,t�`�A�6 w t drAp to 10 SIX" ��w �;'`. ..a''w`'. � ti3.,;•fir • w c los 'fo 004%.0 rfjkx, 'CO spk JOS, 4 J.0cA.*T- Paoli 'and A 5 oc �5 f'[ftE'E Y ty` 1 y tri S'���' �rt'�i. .i r � F � ,. � � �t v . IE.. - '_ .'� •';t "a 0 rid i` `� y 1= a yt KELUMNB.:A J", � 4 •ty" �.{7M1Tr4.�� uy�oce I i ..� �' ...'�M". ' t 40 '• Y F Y I t� �y11 .� .' k'}� � At;3y-,fix}! }•,.' I � _• yµ �y � �yY ,c,t � ���y�•` 4 1J� T MOODtY6y triEk i-. ,,,..;•, e.. . rj .$est Sit .kr t yU 1 r� T,ntwood Ci4106 irtsr v n ra, r * y�otst t1 .. ,. c r j XrWy •. ,c � tt+■ �� Y�Y ` IAO s d BAIFCJIIF OA Pei A fp .+► 6• venue . l COntra Costa i7 "'Sidle ....+r^ � r E rek: 00 paAvenue a tT ! ne Avenue x... �t • g p iz t ncord male rIGUfe g-2 Michae Paoli GWW'AL OCATIOt' and AS'socleteS EXISTING SPHERE OF INFLUENCE I Balfour Road Jtrt/t ,,tit Jt/tltit/tltV—z ... i ♦ , i ♦ ta ♦ ♦ ♦ ♦ i ♦ Concord * Y ! I ! t # ! Y ! + I ! i�a ♦ v a ♦ v ♦ t ♦ r a t • \!`J`lt J`I`J`J`I\/`,`/\/ " Avenue M Area Q Y� rea • -f`#`1\/\/`I`!\t\!fir /`r G a i t \ ♦ t \ \ \ \ \ \ ♦ i t � • - / J I I / J J I Y f I ! ! J ! I x1 \ \ i \ \ t a a i i ♦ \ t i ♦ a • I t ! I / r ! f / ! r / ! # I / / ♦ �/♦J♦ii. +\res/\JtJ`Itr,JaJt/tltl\Itlt/ # t/\/\!i! tJil/..,,,i,,�Jyyyya.��-l�-,iYtftJiryi.JyiftJtJtrii I / Y I I J ! r i \ \ •� ! I / t ! ! I I 1 I J ! Y ! /l ■ \ l i ♦ i ♦ \ ♦ k \ i i i i VV{{ •i r ! / / Ir / IIr / I ifI / • \iaiii, a , iltr i,i♦i`rai EXISTING • • \J`lop ait "" CITY LIMIT ♦ i t_t ;�nos Side • , ,,�,\....�.,; pt r J i\/iitial\i♦iii\res i.. \ i \ t t a i 4 \ a •� /,lvr ++�trvrart+a be \it!♦rar\I\tt i ll ♦ \ \ ♦ \ \ ' • 4}itis} ti t trtrt /r.s #i I I.flit:till;;}-. t+tivit+t /i V �� f a� if • Oumed by Contra Costa =f= + Flood Control and Water Conservation District Concord t i , + o Avenue iF 9 3 I :ff fiI#ff4t11� t 11--..ss s ssshf a is1rit Area f 111z r ! sv ♦ i � •�' ° jti�f31i1��ti 3# I3 f}t 3J r t • #i!i�I♦ ,,J f� }��t I i�p# 2 ,► Y\ lr r �##��1\rtY*t\rir`!t f♦ r ! I ! J I / / I r if J / 1 I / f f /•I.! I ! i i i a i \ \ \ \ \ \ a \ \ \ i 1 \ i i \ \ a ♦ \ f / J r J J ! I / I / Y i � t,i,,,k+�''�`i t es t a ♦ t t \ \ i i a t \ i \ • • •it *ifir • iitrt+aYiJiY*JiJiri ! • Briones Vi�� t``Ia/\/vrvlaf ytry♦�! s .Project Area Boundary • r low, r i 1► - b Michael Paoli p and PROJECT LOCATION FIGURE B-3 Associates 4 •�� ..: ,r t T �+� �`t� { %* t` j!�, t �� t t t ; ,Yyy+'�^ �� y �att� 'k`�*�..,� } f 'aVtl ,t.w tf pfd+`5'. ..•^' to r• ec � �"'�_+ f.�,�~`�. t R "cX°y a t• psYa Itt lit 90 {.i it � •'t,�;`'�a* }� � } �, :�i i p � A { n r aRKx x It x all, a L '1 galx BAL FOUR ROAD 1tos LtMD SCALE IN WE€' ©� ULD USD WC 100' 0 200' +00' s _ Im It r Ung 1 ULv 1 PEC os�� UHD PR ULD G �1 1I LL! cis n s s 0CL ` •, c'` �'° P s X Jj - UL.LD ULD ULD w asp a res as i t W ULD �.+'' GC ULL GOLF COURSE PEC En Q tis + # Ila ULD �.,� �� ULD � CL CIS GOi CF OURS 1 ULD "`"`►...,.., os f'� M t ULC / os ULD t os .''� .� UR CE GOLF COURSE �,,•' +��`� �d�� ULLD -----�- f 13 LEGEND ULLD URBAN LOW-LOW 25.8tAC ULD URBAN LOW 226.0tAC 1 UMD URBAN MODERATE 36.9tAC U"o URBAN HIGH 19.9 t AC Nc NEIGHBORHOOD COMMERCIAL 14.7tAC CIS PEC PLANNER EMPLOYMENT CENTER 54.4tAC PF PUBLIC FACILITY tsar ) 1.5tAC S SCHOOL 10.OtAC Os OPEN SPACE 296.2tAC PR PARK/RECREATION 16.7tAC a Lift URBAN RESERVE 36.BtAC Figure ure "5 ROADS 11 =A TOTAL 7501tAC op GISNERAL PLAN LAND R91?19RS USE CATEGORIESINC Etl$TlMlt1�t41Y4t A. (3. SPANOG COMPANY INC..`. f«c±aumaai�.x� CITY CP biRtNTWOOD,CALIs=OXMA sss►-RS 83 percent, of the site. The proposed golf course will be the major open space feature and will be the focal point of many of the residences. There will be a total of 1,622 residential units within the project area. Residential development will range in density from 3 to 16 units per acre. The overall density for the 309 acres designated for residential use will be 5.3.units per acre and for the entire 751-acre project site, 2.2 units per acre. Access to the project will be from Balfour Road and a new Concord Avenue road alignment west of, and parallel,to, the existing alignment. The project site . has approximately one mile of street frontage on both Balfour Road and Concord . Avenue. The proposed Delta Expressway will parallel the east side of existing Concord Avenue and will have an interchange at Balfour Road. b. Residential Areas (1) Detached Single Family Units on Individual Lots The Land Use Plan (Figure B-4) encompasses the development of 1,202 single family dwelling units on lots ranging in size from 4,000 to 10,000 square feet. The lots are generally arranged in groupings of similar lot size, separated from other single family residential areas by the golf course or other open space features. The groupings of single family lots in the southern portion of the site are generally located on hilltop areas while the golf course will occupy lower areas between the hills. Primary access to the western residential portion of the project, which includes single family residences and the golf course, will be provided from Balfour Road. The main entrance to the project site will be via a north-south road which intersects Balfour Road in the center of the project's northern boundary. This road leads to the country club. An internal circulation system will connect this road to the various single family residential groupings. 'Within these residential areas, two-lame, curvilinear roads and cul-de-sacs will provide direct residential access. Primary access to the northeast section of the project, which contains commercial uses, cluster residential units, and the school site, will be provided by Concord Avenue along its new right-of-way. The western residential and eastern mixed- use portions of the project will be connected by a divided, two-lane road running east-west about 1,000 feet south of and parallel to Balfour Road. The proposed Delta Expressway will pass along the eastern edge of the project, immediately east of the existing Concord Avenue alignment. The Delta Expressway is planned to have an interchange at Balfour Road. Michael Paoli and Associates B-7 (2) Cluster Residential Units/Low Density The 102 low density cluster residential units planned for the project site are located within the Concord Avenue area outside the boundaries of the Spanos site. They are located in the northeast area of the project site between a cluster of single family residential units to the west and a neighborhood commercial center to the east. The low density cluster residential units encompass a total of 11.3 acres at a density of 9 dwelling units per acre. These units may be built as condominiums. Access to the low density cluster residential units will be provided from a two- . lane street which will connect Concord Avenue with the main project access drive. The units may also be accessed from Balfour Road. (3) Cluster Residential UnitslHigh Density In the northeast section of the site, 318 high density cluster residential units will be located on 19.9 acres of land. The residential density within this portion of the project will be 16 dwelling units per acre. Access to the high density cluster residences will be provided by Concord Avenue and two other streets connecting to Concord Avenue. The high density cluster units will be located adjacent to neighborhood and planned employment commercial center areas (to the north and east), a park site (to the west), and a school (to the south). c. Country Club and Golf Course The project includes a country club and a 211-acre golf course as an integral open space and recreational feature for the site. The country club will provide such facilities as a restaurant, bar, and pro shop. Many of the single family residences will be located either on, or within view of, the golf course. The golf course will be privately owned but open to the public. Four ponds located along the golf course are intended to provide scenic enhancement to the site, as well as collect storm water runoff. Water for irrigating the golf course and filling the ponds is proposed to be obtained from the East Contra Costa Irrigation District. d. School Site and Day-Care Center A school (10 net acres) and day-care facility (1.5 acres) are proposed for an area located in the northeast section of the project site. Access to the school site will be provided by Concord Avenue, as well as from a road extending from Concord Avenue along the school's northeast boundary. In addition, a two-lane road will provide access to the school from nearby residences along the school's southern boundary. B-8 Michael Paoli and Associates e. Park Site A public park site is proposed for an area of 16.7 acres located in the northeast section of the project area. All but about 1.6 acres of the proposed park is located outside of the Spanos site. The park will be accessed from two roads connecting it with Concord Avenue and the western residential portion of the project. The park site will be set aside for acquisition or dedication by the City of Brentwood and maintained by the Brentwood Recreation and park District. f. Neighborhood Shopping Center and Planned Employment Center (1) Neighborhood Shopping Center A neighborhood shopping center is planned for a 14.7-acre parcel at the southwest corner of Balfour road and the new Concord Avenue alignment. The neighborhood shopping center will provide basic commercial services to residents of the Brentwood Country Club, as well as to nearby residents. Approximately 160,100 square feet of building area is contemplated for the neighborhood shopping center. (2) Planned Employment Center A total of 64.4 acres in the Concord Avenue area are designated by the land use plan for development as a planned employment center. This land is located along the entire eastern edge of the project site adjacent to the proposed Delta Expressway. The center will include research and development, office, light industrial, and supplemental commercial uses at a floor area ratio (FAR) of 0.30. Approximately 710,900 square feet of building area are proposed for the planned employment center. The intent of the planned employment center is to provide an employment-intensive land use which will attract local residents, thereby improving the jobs/housing balance in the Brentwood area. g. Public Utilities and Services It is proposed that public utilities and services for the project will be provided by the agencies listed on Table B-1. h. Relocation of Electric Transmission Lines and Underground Pipelines A set of 230 kV overhead electric transmission lines and four underground pipelines (three natural gas and one petroleum) pass through the property on easements of various widths generally in a northwest to southeast direction. The 230 kV electric transmission lines, and the towers that suspend them, are protected by a 205-foot-wide easement. In the northwest portion of the site, the towers and easement are proposed to be relocated such that the easement would Michael Paoli and Associates B-9 TABLE B-1 PUBLIC UTILITIES AND SERVICES -,Utility or Service A enc Potable Water City of Brentwood Irrigation Water East Contra Costa Irrigation District Wastewater City of Brentwood Flood Control and Drainage Contra Costa County Flood Control and Water Conservation District and City of Brentwood Solid Waste Brentwood Dis osal Service Law Enforcement City of Brentwood Police De artment Fire Protection/Emergency Protection/EmergencyServices I East Diablo Eire Protection District Schools Liberty Union High Schaal District Brentwood Union School District Parks and Recreation Brentwood Recreation and Park District Library Contra CostaCoun Public LibraU Electricity and Gas Pacific Cas and Electric Company Telehone Pacific Bell Streets City of Brentwood B-10 Michael Paoli and Associates abut the western properly line and then extents east back to the existing easement in the west central portion of the site. The underground pipelines are proposed to be relocated such that they do not pass under the proposed residential lots, except in the northwest portion of the site where they are proposed to pass along residential side lot lines. These facilities and the potential impacts associated with them are described in Section N, Hazardous Conditions. 3. I!RQ.TECT EHASJ The project site is planned to be built in five phases (see Figure B-6). In the first phase, Balfour road will be widened and the main entry road to the country club will be built, as will three residential access reads. The golf course and approximately 488 single family residences in the northwest portion of the site will be built with this phase. In phase two, the school and park sites will become available for improvement, a residential road in the southeast portion of the site will be built, and approximately 294 homes will be constructed in the eastern portion of the site. In the third phase, several roads will be completed and approximately 306 residences constructed in the southwest portion of the site. Phases four and five will concentrate on development in the Concord Avenue area of the project site, including the construction of cluster residential housing and neighborhood commercial and planned employment centers. The above phasing plan is only a projection. The actual construction of the project may differ. Except as otherwise noted in this EIR, variations in the timing of construction are not expected to affect the significance of project impacts. 4. TENDEUSES. OF LIE a. Lead Agency • City of Brentwood The City of Brentwood is the Lead Agency for the project and must review and approve the following applications before the project can be developed: • General Plan Amendment Application No. 89-3, to change the designation of the annexation area from AC, Agricultural Conservation, and PEC, Planned Development Center, to Planned Development, to allow development in accordance with the land use plan shown on Figure B-4 and the General Plan land use designations shown on Figure B•5. • Prezoning Application No. 89-9, to prezone the annexation area to PD, Planned Development as shown on Figure B-4. • Preliminary and final development plans. Michael Paoli and Associates B-11 SX MWS .11"k7 AWJM'S OOQM.UMii u rrrrr� ► it 1*4 1 b 1 $ @ Q PT 11-.1 1 lid> a Q .� _. 9 . fit 1 1111 . W� B g. C . Y � I l Is a m Gat 4039 a M _r w 1 ll.K r. 1 . -.yr./' (J •} I'�}"`4 'Y#� �, 1�y,f 1 \` ' {�`' y • .,.t'.� 1 ��`Y ,7`I�1,' , •.,,,: .�,il 7-4 .i. � 'ef t� i �p,, •� iJ s � � I= 1}1 i t', �h ' V^ ./ ' f .11a +!S• ��' �' 41/�' 1 •'y„ IiY.N,;. ;yam." C 1��4� `M Y` ♦1 5�� H � /; ,f' f_�'. �i `k'� 'kf.i �4�,��,iw+: ��,�', , � , e 1� �, �`1- �cry Y`• .. � �, i Y, i ! L ". 'i + vJ' 1 t "v", ': •.f.j t •+j 1, i � •' 't „1 .��.� 1 J�' .3, e • Vesting tentative map application to subdivide the project site in accordance with the Planned Development general plan and zoning designations. • Use permit for country club (restaurant, bar, pro shop). • Development Agreement. • Annexation Application No. 89-4, to amend the Sphere of Influence of the City of Brentwood and annex the area to the City. • Capital Improvement Financing Program (CIFP 91-1) pursuant to the City's phased development plans. • The project site is subject to Agricultural Preserve Contract No. 12-76, established by Contra Costa Board of Supervisors Resolution No. 761144. A Notice of Nonrenewal of the contract was filed with Contra Costa County on November 27, 1989, by the property owner, A. G. Spanos Construction, Inc., and accepted by the County on December 6, 1989. The contract will have to be cancelled by the City before the project can be developed. b. Responsible Agency - Contra Costa County Local Agency Formation Commission (LAFCO) The amendment of the Spheres of Influence of the City of Brentwood and other applicable service providers to encompass the project site and the annexation of the site to the City of Brentwood and such service providers would be subject to review and approval by the Contra Costa County LAFCO-, therefore, LAFCO would be a Responsible Agency for the project. c Other Responsible Agencies • State of California Department of Fish and Came - Section 1603 Streambed Alteration Agreement, Contra Costa County Flood Control District. Approval to use flood control basin for golf course. Fast Contra Costa Irrigation District. Annexation to District. Brentwood Recreation and Park District. Annexation to District. • California Public Utilities Commission and Pacific Cas and Electric Company. Relocation of overhead electric transmission lines and underground natural gas and petroleum pipelines. Michael Paoli and Associates 13-13 • Other approvals and entitlements as may be necessary from local, state, and federal agencies. B-14 Michael Paoli and Associates . t SECTION C LAND USE SETTING, IMPACTS, ANIS MITIGATION MEASURES 1. SETTING a. Regional Land Use and Urban Growth The City of Brentwood, situated in eastern Contra Costa County, is on the edge of rapidly expanding urban growth in the San Francisco Bay area. Although still a small, largely agriculturally-oriented community, Brentwood is experiencing substantial development pressure. This pressure sterns mainly from rapid economic and job growth that occurred in central Contra Costa County (Concord, San Damon, Walnut Greek) in the 1980s. The relocation of office- related employment, primarily from San Francisco, to central Contra Costa County, added more than 42,000 jobs to the County between 1985 and 1987. As land for residential development has become more scarce and expensive in central Contra Costa County and the San Francisco Bay area in general, demand for affordable housing has spilled over to the east county, especially the Antioch and Brentwood areas. In 1948, when Brentwood was incorporated, the City had a population of 1,805. By 1977, the City had grown to 3,804 persons and, by 1990, the population had reached 7,060 (Planning Center, 1991). As of January 1991, the City of Brentwood had a population of 8,255 (Department of Finance, 1991). By the year 2045, the City's population is expected to reach 28,400, an increase of 344 percent over the 1991 population (ABAG, 1989). The City of Brentwood is in the process of updating its General Plan. The updated General Plan is intended to provide for growth within the Brentwood Planning area to the year 2020 and a buildout population of between 73,040 and 147,000. The number of jobs in Brentwood is expected to increase from 2,220 in 1990 to 4,460 in 2045 (ABA( , 1989). This 200-percent increase is substantially less than the projected 344 percent population increase, and indicates that Brentwood will increasingly become a bedroom community for Central Contra Costa County and other areas. In June 1391, the City of Brentwood had 3,041 dwelling units remaining to be built within approved residential projects and another 1,132 residential units pending approval within the City limits. The majority of these projects are located west of downtown and east or northeast of the project site. There were N4ichael Paoli and Associates C-l an additional 2,278 acres awaiting annexation (including the proposed project), which could ultimately accommodate an additional 6,839 dwelling units (City of Brentwood, 1991). b. Project Site Land Uses Existing land uses on the project site and surrounding area are shown on Figure C-i. The 577-acre Spanos site is open range land, and the primary historical use of the site has been cattle grazing. Improvements on the Spanos site are limited to the following: t • Three natural gas lines and one petroleum pipeline pass underground through the Spanos site. The pipelines are owned and operated by Chevron Oil Company, PG&E, and Stanpac. (See Section N for further information on the pipelines.) • Two sets of PG&E 230 kV electric transmission lines are strung on one set of towers across the western portion of the Spanos site. The towers are within an easement 205 feet in width. (See Section N for further information on the transmission lines.) • Remnants of an old homesite are present in the east-central portion of the Spanos site. • Remnants of an old coal mining operation are present in the southeast portion of the Spanos site in the form of foundations and subsurface pits and shafts. (See Section U for further information on the coal mining operation.) • A small, concrete-lined irrigation ditch extends along the eastern edge of the Spanos site. The ditch is owned and operated by the East Contra Costa County Irrigation District. The 174-acre Concord Avenue area is primarily open agricultural land, including grazing land and orchards. Improvements within the Concord Avenue area include the following: • A residence and several farm-related structures are located on an l I-acre parcel fronting on Balfour Road. • A 58-acre walnut orchard is located at the southwest corner of Balfour Road and Concord Avenue. • Two residences, each with several farm-related structures, are located on separate parcels fronting on Concord Avenue. C.2 Michael Paoli and Associates ', { • ra 11 AZ- of " rA' } r • s ` ZOv BAL14 R R •rnr `` * fir: V ley P j \ It f' `f If it t: 360 —'�,..' '.V•- ''_ ---�,,,--mow',\*r ` 1�i•�' 45j: +'«' S} ! i '` � ;AO? mit ✓ �t66 /� $' INS Jap 1� _ / �j,J'"1 j� 4 * f a Gag -Pu,ping n Statio _ r# Cropland A Remains of Abandoned Farmhouse Rangeland " . Residence/Farm Building ._....p.�, 230 Kv Electric Transmission Line Fanner Mining Area ,_,,, Underground Pipeline Easement �--� r • ■ s • . . . . . Residential Area an Flood Control Darn I Brentwood Gun Club •••«••,.. Flood Control Property 2 Storage Building • Project Site Boundary 3 Abandoned Cattle Operation V = Approx. I/3 Mile Michael Paoli and EXISTING LAND USE FIGURE C»1 Associates • A vacant storage building is located along Concord Avenin, near the south end of the Concord Avenue area. • A flood control channel with two earth dams is located in the southeast quadrant of the project site. The flood control channel and dams are , operated and maintained by the Contra Costa County Flood Control District. The dams and portions of the channel are on land owned by-the district; the remainder of the channel is within a flood control easement. c. Surrounding Land Uses The project site is in a rural setting, with range land to the south and west and crap and range land to the north and east. Development in the immediate area is limited to the Brentwood Gun Club located east of the site and Concord Avenue, and remnants of a cattle operation located west of the site. The nearest existing urban development is about three-quarters of a mile east of the project site, between Fairview and Minnesota Avenues, in the City of Brentwood, Downtown Brentwood is about two miles east-northeast of the site. The City is processing proposals for large-scale development projects on the land immediately north, northeast, and east of the project site. The 433-acre Hancock project is proposed for development north of the project site, and the 369-acre Blackhawk/Nunn project (Brentwood Lakes) is proposed for development east and northeast of the site. The two projects would have a total of 1,966 residential units, together with commercial and other uses. (See Section W for additional information on the location and composition of the projects.) d. Public Land Use Plans (1) 1983 Brentwood General Plan All but the southern 100 acres of the project site is within the 11,130-acre Brentwood General Plan area. The General Plan area covers all land within the City of Brentwood as well as unincorporated land outside the City that has been determined by Brentwood to bear a relation to its planning efforts. Although the vast majority of the project site is within the General Plan area, all but the northeastern 80 acres is outside the City's Sphere of Influence. The Brentwood General Phan consists of eight elements: Land Use, Circulation, Master Facilities, Housing, Conservation and Open Space, Seismic Safety, Noise, and Safety. The first three elements were adopted in 1983, while the latter four were adapted in 1978. The Housing Element was recently updated and adapted in 1991. A comprehensive update of the General Plan is underway and is expected to be completed in late 1992. C-4 Michael Paoli and Associates The Brentwood General Plan designates all but 80 acres of the project site for "AC" Agricultural Conservation use. The 80 acres in the northeast corner of the site are designated "PEC", Planned Employment Center, in order to provide job-generating uses adjacent to the future Delta Expressway. The intent of the PEC designation is to provide for an integrated pattern of industrial parks; business and research parks; large, individual corporate establishments; professional and administrative offices; and commercial activities, in conjunction with residential uses to provide for the housing needs of the employees in the PEC. Each PEC mast designate at least 51 percent of the total land area for employment-generating uses. An evaluation of the project's consistency with the applicable land use policies of the Brentwood General Plan is presented under Impact f in this section. (2) Brentwood General Plan Update The City of Brentwood is in the process of updating its General Plan. A preliminary version of the Land Use Element was endorsed for further analysis by the City Council in December 1991 and an EIR for the plan is being prepared. The update of the plan is expected to be completed in late 1992. The plan provides for a buildout population of between 73,000 and 107,000 in the year 2020, which is substantially greater than the 50,000 buildout population anticipated in the existing General Plan. The preliminary land use plan .map designates the project site as Special Planning Area "E". This area is described as having a maximum of 1,428 units (1,785 units with a golf course) and would include a mix of housing types, business park and neighborhood commercial uses, an elementary school, and substantial open space. The preliminary land use map designates property to the west and south of the project site (Special Planning Areas "D" and "H") for potential development at a maximum density of two units per acre. Special Planning Area "C", to the north of the project site, is designated for a maximum of 982 dwelling units (1,165 units with a golf course) and would include a mix of housing types, office and business park uses, an intermediate school, and substantial open space. An evaluation of the project's consistency with the applicable Land Use Element goals and policies of the preliminary Brentwood General Plan update is presented under Impact g in this section. (3) Contra Costa County General Plan The Contra Costa County General Plan, adopted in January 1991, includes the following elements. Land Use, Growth Management, Transportation and Circulation, Housing, Public Facilities/Services, Conservation, Open Space, Safety, and Noise. The Growth Management Element of the plan was developed Michael Paoli and Associates C-5 based upon the provisions of the 1988 Measure C approved by County voters. This measure added one-half cent to the County sales tax to fund needed transportation improvements. In order for the County or a municipality to receive street maintenance and improvement funds under Measure C, it must have adopted a Growth Management Element in its general plan. The measure established specific level of service standards for street intersections and provided that additional standards for sewer, water, storm drainage, police, fire, and parks must be included in local general plans. In 1990, another Measure C was approved by County voters which established the 65/35 Land Preservation Standard. This standard was adopted in the County General Plan and limits urban development in the County through the year 2005 to no more than 35 percent of all land in the County and requires at least 65 percent of the land to be preserved for agriculture, open space, wetlands, parks, and other non-urban uses. The County applies the 55/35 standard to all areas of the County, including urban and non-urban uses within City boundaries. An Urban Limit Line, beyond which no urban uses can be designated, has been established by the County to facilitate the enforcement of the 65/35 Land Preservation Standard. All but the northeastern 80 acres of the project site is designated "AL", Agricultural Lands, by the Contra Costa County General Plan. The purpose of the agricultural lands designation is to preserve and protect lands capable of and generally used for the production of food, fiber, and plant materials. The northeastern 80 acres of the project site is designated for "BP" Business Park uses. This designation allows a mix of commercial, office, and light industrial uses, which, by the high quality of their development and the nature of their operations, demonstrate compatibility with adjacent commercial and residential uses. An evaluation of the project's consistency with the applicable land use policies of the Contra Costa County General Plan is presented under Impact h in this section. 2. EHQ.TECT IMPACTS ;AN12 MITIQATION MEASURES a. Impact Change in project site land use ,from agricultural to urban uses and resulting population increase If the project is developed, the use of the project site would change from agricultural to an urban, mixed-use planned community with 1,622 dwelling units, 711,000 square feet of Planned Employment Center development, 160,100 square feet of Neighborhood Commercial uses, an elementary school site, a public park site, and an 18-hole golf course. Full development of the C-6 Michael Paoli and Associates project would generate an additional population in Brentwood of 4,957. This would represent a 60 percent increase over the City's 1991 papulation of 8,255. The proposed change in land use and resulting increased population would have a number of impacts on local and regional resources and conditions, including agricultural resources; biological resources, traffic and transportation; air quality; noise; storm drainage and flood control, water supply, wastewater collection, treatment, and disposal; solid waste, hazardous conditions; law enforcement; fire protection and emergency services; schools; parks and recreation; energy resources; aesthetics and views; and cultural resources. These impacts are described in the subsequent sections of this EIR. Mitigation Measures Mitigation measures for project-related impacts are presented in the subsequent sections of this EIR. Level of Significance The mitigation measures can reduce many of the impacts to a level of insignificance. However, as described in the subsequent sections, a number of the impacts cannot be effectively mitigated and, therefore, are considered unavoidable and significant. b. Impact Potential land use conflicts with surrounding agricultural uses The potential for the urban project to conflict with surrounding agricultural uses is evaluated in Section D, Agricultural Resources. Mitigation Measures See Section D. Level of Significance See Section D, C. Impact Potential lana use conflicts with planned or proposed adjoining urban uses Most of the land north of the project site, across Balfour Road, is designated by the Brentwood General Plan for Agricultural Conservation use. This land is Michael Paoli and Associates C-7 encompassed by the Hancock development proposal. Just east of the Hancock project site is land designated as a Planned Employment Center, which mirrors the PEC designation on the project site south of Balfour Road. The land east of the project site, across Concord Avenue, is designated for PEC uses (northern portion) and Agricultural Conservation (southern portion). Most of this land is encompassed by the Blackhawk/Nunn development proposal. There should be no land use conflicts between the uses proposed for the project and the urban uses planned or proposed for the land to the north and east. The residential, commercial, and other land uses proposed for the project are similar to those planned or proposed for the nearby land. Moreover, the project will be separated from the land to the north by Balfour Road,which will be developed as a four-lane thoroughfare, and from the land to the east by the proposed Delta Expressway. Mitigation Measures No mitigation measures are required. Level of Significance There are no insignificant or significant impacts. d. Impact Potential land use conflicts within the project site The project appears to be master planned in a manner that will avoid potential internal land use conflicts. The project master plan places the most intensive land uses adjacent to the major transportation routes in the northeast portion of the site. The Planned Employment Center abuts the proposed Delta Expressway alignment and the proposed new alignment for Concord Avenue. The neighborhood commercial center is situated on the corner of the new Concord Avenue alignment and Balfour Road. The location of the commercial uses will allow convenient and appropriate access for employees and customers of the uses. The hierarchy of uses includes the high and low density cluster residential areas and the park and school sites. The cluster residential uses provide for a transitional, medium intensity use between the commercial uses and the single family residential areas and school and park sites. The cluster housing areas have access to major streets and are within walking distance of the employment center and the neighborhood shopping center, as well as the school and park sites. The school and park sites are located between the cluster and single family residential areas, with access provided on local streets. C•8 Michael Paoli and Associates The western two-thirds of the project site consists of clusters of residential lots, ranging in size from 4,000 to 10,000 square feet, interspersed among the golf course and open space features of the project. The only points where commercial and residential uses abut and could conflict are between the neighborhood commercial and the low density cluster residential sites in the northeastern corner of the site and between the PEC area and single family lots in the southeastern portion of the site. One other area of potential conflict is between the country club parking lot and several nearby single family lots in the southeastern portion of the site. The potential for significant conflicts in these areas appears minimal, however, due to provisions of the City's zoning ordinance which require extensive landscaping, screening, and walls, and establish performance standards for all commercial uses. Further, the PD Planned Development Zone proposed for the project will require the establishment of a tailored set of development and performance standards designed to ensure land use compatibility while allowing for design flexibility. Additionally, the site landscaping plan shows landscaping between the PEC area and the single family lots in the southeast area of the site and between the country club parking lot and the adjacent single family lots. Mitigation Measures The proposed project design and landscaping plan and the provisions of the City zoning ordinance will mitigate any potential internal land use conflicts. No additional mitigation measures are required. Level of Significance The potential for internal land use conflicts is not considered significant. e. Impact Inefficient location, configuration, and access for elementary school site An elementary school site is designated for a 10-net-acre parcel in the east- central portion of the project site (see Figure B-4). The irregularly-shaped site is located on a hill with elevations ranging from less than 140 feet at the site edges to over 180 feet at the hill top near the center of the site. The location, configuration, and access for the site may pose problems for the efficient development and operation of the school. The irregular, five-sided shape of the site may pose difficulties for efficiently siting school buildings and athletic fields. Michael Paoli and Associates C-9 Substantial grading will be required in order to provide level areas for building pads and athletic fields. The project grading and drainage plan indicates that the hill upon which the site is located will be leveled to accommodate the school. The hill, with a maximum elevation of over 180 feet, will be reduced to a relatively level platform with an elevation of 135-140 feet. While this may facilitate development of the school, it will result in the loss of the hill as a scenic feature of the site. Most students attending the school will come from residential development in the project. The school site, however, is not geographically central to the residential development. This will result in students having to walk longer distances to reach the school and more students having to be transported to school than would occur with a more central location. The off-center location of the school is somewhat mitigated due to residential development surrounding it on three sides; however, the area east of the site and Concord Avenue is proposed for a Planned Employment Center, which will generate no students. Direct access to the school site will be via two local streets located on the north and south sides of the campus. The locations of these streets pose several potential problems. First, in order to effectively use the streets, school loading and parking facilities will have to be developed at opposite sides of the site. This may pose supervision and safety problems, reduce the efficiency of the school design, and increase the cost of school development. Second, the street on the north side of the campus extends through the Concord Avenue area, not the Spanos site. The street would not be available to serve the school until the property owners in the Concord Avenue area decide to develop their property. It would, then, only be available if the property owners develop . their property following the design shown on the project master plan. Third, the street on the south edge of the site is shown extending just beyond the east boundary of the school site, and then dropping south into presumably a residential area. (The land south of the school is owned by a church and may be developed with a church instead of residential uses.) The northern one-half of the street is on the Spanos site;the southern one-half is in the Concord Avenue area. Based on the location and design of the north and south streets and the land ownership pattern in the area, the only assured access to the school would be on the south edge of the site via a half-width street developed on Spanos property. This street would dead-end near the east boundary of the site. This limited access would not be adequate on a short- or long-term basis for an elementary school. Mitigation Measures The school site shall be moved to a more appropriate location within the Spanos site. One possible location is immediately west of the present Iocation, at the C-10 Michael Paoli and Associates , northeast corner of 28 Street and 4 Drive. This would place the school at the intersection of two streets located entirely on the Spanos site, which would assure that more efficient and timely access could be provided. A site at this location could have a more regular configuration, and the extent of grading required may be reduced. Level of Significance Relocation of the school to a more appropriate location such as described above would reduce this impact to a level of insignificance. f. Impact Inconsistencies with Brentwood General Plan land use policies Table C-I lists land use policies of the Brentwood General Plan applicable to the proposed project and discusses the project's consistency with the policies. Based upon the information in Table C-1, the project is consistent with all of the applicable policies except for Residential Development Policy I under Subelement A-4, which states that: Density of residential development shall recognize natural environmental constraints, hazards, traffic and access, necessary public utilities and municipal services, and general neighborhood design. The proposed project will result in the removal and endangerment of oak gees, substantial alterations to the topography of the hills, and will place residents in close proximity to potential hazards (high-voltage power lines and underground pipelines). Mitigation Measures Mitigation measures for the loss and endangerment of oak trees, for the alteration of hill topography, and for potential hazards are discussed in Sections F, T, and N, respectively. An alternative is presented in Section V which would preclude development of the hill areas. Level of Significance The mitigation measures related to the oak trees and alteration of hill topography would not lessen the impacts to a level of insignificance. Therefore, the project's inconsistency with Residential Development Policy 1 under Subelement A-4 constitutes a significant unavoidable impact. The potential hazards related to the project, however, are not considered to be a significant unavoidable impact. Michael Paoli and Associates C-11 S TABLE C-1 PROJECT CONSISTENCY WITH APPLICABLE BRENMOOD GENERA,PLAN LAND USE POLICIES Policies Consistent Discussion D 1m tA- . CQmm.un1J,y GroWhn 2pt11e,"t Balanced Community 1. Growth and development within the Yes A jobs/housing imbalance currently Brentwood Planning Area should exists in Brentwood. The General move the community toward a Plan has established a goal of 0.88 balanced community, rather than a jobs per household. The ABAG bedroom community. estimate for the jobs/housing ratio ' for Brentwood in 1990 is 0.67. The a proposed pro ect, which would provide 1,45 jobs, would help , Brentwood move toward its goal of becoming a balanced community. e Overall Community Size 1. Within the planning boundaries Yes The project would add 1,622 established herein, the community dwelling units and 1,456 jobs to the should plan for an ultimate City of Brentwood. Buildout of the residential holding capacity of General Plan area as currently approximately 15,000 housing unitsplanned would result in the in order to: development of about 13,000 dwelling units. The addition of the • Establish the extent of local project units would result in a total economic growth needed to of 14,622 units, which approximates balance jobs with housing. the 15,000 ultimate housing unit holding capacity. • Establish ultimate expansion levels for urban utilities and As previously mentioned,the project municipal services e.g., sewer, would help Brentwood move toward water, drainage, police and fire its goal of becoming a balanced protection, schools, paras, civic community. The project will center,corporation yard,etc. provide for'the necessary services and utilities through participation in a Capital improvement Financing Program, an agreement with the Brentwood Union School District, and various other measures. t C-12 Michael Paoli and Associates : TABLE C-1 continued PROJECT CONSISTENCY WITH APPLICABLE BRENTWOOD GENERAL PLAN LAND USE POLICIES Policies Consistent Discussion 2. It is the City's goal to gradually Yes The density of the residential increase its overall average gross development on the site ranges from residential density for urban 3 units per acre to 16 units per acre, residential development from S.l in with an overall density of 5.3 units 1982 to 6.0 in order to move toward per acre on the land to be designated the ultimate residential holding for residential development. capacity target within the planning boundaries and achieve increased efficiency of public utilities. Direction and phasing of Growth 1. Emphasize urban residential growth Yes The project site is located west of in a northerly and westerly direction Downtown and provides 1,455 jabs from the Downtown with defined on site. higher densities around the Downtown to help support Downtown activities, provide housing near employment and balance overall community farm. 2. Eine large employment center should Yes The eastern portion of the project be provided for along the proposed site, adjacent to the proposed Delta Highway 4 Extension to the west of Expressway, is part of a large . Downtown and additional Planned Employment Center. employment centers in strategic locations next to the railroad and major roadways in proximity to Downtown. 3. Outward expansion of development Yes The project is participating in a from the Downtown and existing Capital Improvement Financing neighborhoods should be gradual. Program in order to provide services Timing of development must and facilities in an efficient and recognize the pattern of existing timely manner. public utilities and municipal services as well as constraints in public financing. Michael Paoli and Associates C-13 TABLE C•1 continued PROJECT CONSISTENCY WITH APPLICABLE BRENTWOOD GENERAL PLAN LAND USE POLICIES Policies Consistent Discussion i Ultimate Urban and City Boundaries 1. It is the goal of Brentwood to Yes Most of the project site is within the establish boundaries and to regulate City's existing Cameral Platt area and overall community development so would be substantially separated that Brentwood shall remain from any adjacent community. physically identifiable from surrounding communities. Industrial Development 1. As part of an economic development 'Yes The eastern portion of the project strategy and balanced community site, adjacent to the proposed Delta goal, Brentwood will promote and Expressway, is part of the large otherwise work toward the Planned Employment Center west of development of three major Planned the Fairview-Balfour intersection. Employment Centers within City boundaries---one south of Downtown, another west of the Fairview-Balfour intersection, and the third just north of Downtown. 3. A larger Planned Employment Yes The project, through the use of the ; Center along Balfour Road, west of proposed Ply zone district, will Fairview Avenue, is a longer-range develop a portion of the Planned candidate for development requiring Employment Center portion of the access to markets to be provided by site in a manner consistent with the the proposed Highway 4 Extension intent of the General Plan policy. before reaching full potential, 4 Objectives for this planned center Include: f • Preparation of a specific plan for the full center to provide for incremental development and compatible interim and long range uses; t • Parcels up to 50 acres or more; F C-14 Michael Paoli and Associates f S t- TABLE C-1 continued PROJECT CONSISTENCY WITH APPLICABLE BRENTwoo D GENERAL PLAN LAND USE POLICIES a Policies Consistent Discussion • Some large office buildings, • High performance standards to protect sites from surrounding uses, and • A campus-like atmosphere. Commercial Development 3. New. local convenience shopping Yes The neighborhood shopping center centers should be located at the proposed within the project site is to intersections of major streets or be located at the intersection of two highways,where appropriate. thoroughfares. Balfour Road and Concord Avenue. Sub,�IeMent &A, Residential an 1' ghzhboLb o9 DlyelQuinent Neighborhood Organization 1. &7&: A neighborhood should Yes The project buildout population normally accommodate from 1,1344 would be approximately 5,4010, to 3,000 residents. which would approximate the size of two neighborhoods. 2. A=: The area of the neighborhood Yes The pro'ect site,at 751 acres,has the should be adequate to provide for area o about two neighborhoods the required housing at planned and includes considerably more densities, plus land for school, open space (over 304 acres) than neighborhood shopping and service would be found in most facilities,and open space. Normally neighborhoods. The project also a neighborhood should comprise includes land for a school,park, golf from 200 to 400 acres. course, neighborhood shopping center, and employment-generating uses. Michael Paoli and Associates C-15 TABLE C-I continued PROJECT CONSISTENCY WITH APPLICABLE BRENTWOOD GENERAL PLAN LAND USE POLICIES Policies Consistent Discussion 3. Doun e>: Neighborhood Yes The boundaries of the project site boundaries may be formed by consist of major trafficways-- topographic features such as a Balfour Road-on the north and the drainageway or canal, major proposed Delta Expressway on the trafftcways, or planned sections of east and open space on the west the open space network. Boundaries and south. shall be laid-out so as to encompass a reasonably compact area capable The project is not reasonably of accommodating the necessary compact due to the extensive neighborhood components in an amount of open space within it, but efficient, harmonious relationship to does accommodate neighborhood each other. components in an efficient, harmonious manner. 4. Neighborhood Structure: Each Yes The project is comprised of a neighborhood should be composed number of distinct subunits of of subunits of 200 to 300 dwellings, various densities, separated by golf characterized by integrated planning, course and open space features. a reasonable variety of dwelling units, and set off from one another by landscaping and trees. Through the principle of cluster planning, the net density of the housing subunits can be somewhat increased with the balance of the land area going into open space. 5. DleighbodS}d Cir ala 'ren: Neigh- Yes The project site is bounded and not borhoods should be bounded and not penetrated by major traffic routes: penetrated by major traffic routes. Balfour Road,Concord Avenue,and Street systems within neighborhoods the proposed Delta Expressway. shall be designed to provide The internal street system has been convenient, safe vehicular access to master planned to rovide dwellings while at the same time convenient access to alt units. minimizing auto travel in the Project land uses and the circulation neighborhood. Pedestrian and system have been planned to bicycle path systems should link all minimize motor vehicle trips and to parts of the neighborhood and promote bicycle and pedestrian provide safe and pleasant access travel. Because of the large size of from dwellings to neighborhood the site and the amount of open schools, parks, shopping and space provided, some of the units in services. As a general rule, no the hill areas are further than three. person should have to walk more quarters of a utile from the school than three-fourths of a mile to reach site, the park, site, and the the school, park, or neighborhood neighborhood shopping center. shopping center. C-16 Michael Paoli and Associates W t TABLE C-1 continued PROJECT CONSISTENCY WITH APPLICABLE BRENTWOOD GENERAL PLAN LAND USE POLICIES 4 Policies Consistent Discussion 6. bbgrbQod SrryiQes,. Each Yes The proposed project includes an neighborhood shall provide a elementary school site, a park site, neighborhood elementary school, and a neighborhood shop 91 center park, and playground. Park, play- site. The higher densi lousing on ground, and school may be the site is located Ymrnediately integrated into a combined unit, or adjacent to the park site. There is may be provided separately, land in the southeast portion of the depending on neighborhood needs site owned by a church which may and design. Smaller open spaces be developed as a church facility. including tot lots shall be provided The land appears to be appropriately in at least some of the housing located for a church facility in subunits with particular-attention to relation to other planned uses and is the needs of medium and high on the proposed new alignment of density areas. Shopping facilities Concord Avenue, which would shall be provided in a location provide appropriate traffic access. proximate to each neighborhood or a shopping center for two or more neighborhoods may be provided at a convenient central location at the intersection of the neighborhood borders. Provision of land for churches and other social organizations shall be made in accordance with overall needs. Although there is not expected to be a church in every neighborhood, whenever a church or other social or*anization facility is included in a neighborhood, it shall be located in such a way as to minimize disturbance from out-of-neighbor- hood traffic and shall occupy a site sufficiently large to provide off- street parking for the facility, and buffering from adjacent residences. Michael Paoli and Associates C-17 TABLE C-1 continued PROJECT CONSISTENCY WITH APPLICABLE BRENTWOOD GENERAL PLAN LAND USE POLICIES Policies Consistent Discussion 7. sing: Each neighborhood Yes The project provides for a wide should include a variety of housing variety of housing types. Single types consistent with the basic family lots range in size from 4,000 harmony of subarea design. square feet to 10,000 square feet. A Attention shall be given to the substantial number of low and high integration of subarea design themes density cluster housing units will to the end that each total also be provided. neighborhood shall provide a wide choice of dwelling types, sizes, and It is not known if the project will costs. Provision of moderate income provide moderate-income housing housing (consistent with the consistent with the Housing Brentwood Housing Eluent) shall Element. be a requirement of each neighborhood. Residential Development I. Density of residential development No The proposed project will result in shall recognize natural the removal and endangerment of environmental constraints, hazards, oak trees, substantial alterations to traffic and access, necessary public the topography of the hills, and will utilities and,municipal services, and place residents in closepproximvoity to general neighborhood design. potential hazards (high ltage power litres and underground pipelines). , f'1 C-18 Michael Paoli and Associates <.t s w g. Impact Inconsistency with preliminary Brentwood General Plan update land use element goals and policies The preliminary Land Use Element goals and objectives of the General.Plan update are included in Appendix C-1. The project appears to be consistent with all applicable goals and objectives except for a passible inconsistency with Objective 5.3: Residential development shall respond to the environmental setting, maintain open space and preserve the existing natural resources. Due to the loss and potential endangerment of oak trees on the project site and the substantial development and grading of the hilltop areas, both of which cannot be mitigated to a level of insignificance, the project may not be consistent with Objective 5.3 (refer to.Impact f in this section and Sections F and T of this EIR.). Mitigation Measures Mitigation measures for the loss and endangerment of oak trees and for the alteration of hill topography are discussed in Sections F and T, respectively. An alternative is presented in Section V which would preclude development of the hill areas. Level of Significance Since the Brentwood General Plan update is preliminary and unadopted, inconsistency with a preliminary Land Use Element policy does not constitute a significant impact. h. Impact Inconsistencies with Contra Costa County General Pian land use policies Table C-2 lists land use policies of the Contra Costa County General Plan and discusses the projeefs consistency with the policies. Based upon the information presented in Table C-2, the project is consistent with most of the applicable policies, however, it is inconsistent with policies related to infilling of already developed areas, preserving and buffering of agricultural land and open space, hillsides, and ridgelines, and protecting prime agricultural land. Michael Paoli and Associates C-19 TABLE C-2 PROJECT CONSISTENCY WITH APPLICABLE CONTRA COSTA COUNTY GENERAL PLAN LAND USE POLICIES Policies Consistent Discussion Jobs/Housing Balance a 3-2. Job infill shall be su ported and, Yes The jobs/housing ratio in Brentwood stimulated where the obs/housing is 0.47. The= sed project would ratio shows an overs undance of provide 1,456 jobs, which would housing to jobs. contribute to improvement of the overall jobs/housing imbalance in Brentwood. 3-3. As feasible, areas experiencing rapid Yes Brentwoodis experiencing rapid urban growth shall be developed so urban growth. The proposed as to .provide a balance of new project, with a jobs/housing ratio of residential and employment 0.90, will provide a balance of opportunities. residential and employment opportunities. Growth Management,55/35 Land Plan, and Unbar!Limit Line 3-5. Development of all urban uses shall Yes The project is participating in a be coordinated with provision of Capital Improvement Financing essential community services or Program and must pay various facilities including, but not limited development fees which will provide to, mads, law enforcement and fire for infrastructure Improvements and protection services, achools, parks, services. sanitary facilities, water and flood control. 3-7. The location, timing and extent of Yes (See 3-6 Discussion above) growth shall be guided through capital improvements ,programming and financing (i.e., a capital Improvement program, assessment districts, impact fees, and developer contributions) to prevent Infrastructure, facility and service deficiencies. C-20 Michael Paoli and Associates 1 TABLE C•2 continued PROJECT CONSISTENCY WITH APPLICABLE CONTRA COSTA COUNTY GENERAL PLAN LAND USE POLICIES Policies Consistent Discussion 3-8. Infilling of already developed areas No The project does not represent shall be encouraged. Proposals that infilling of already developed areas would prematurely extend nor its it contiguous to existing urban development into areas lacking development. requisite services, facilities and infrastructure shall be opposed. In The project, however, in terms of accommodating new development, infrastructure, would not be able to preference shall generally be given develop prematurely because City to vacant or under-used sites within capital improvement financing and urbanized areas, which have various development fee programs necessary utilities installed with are in place to assure that necessary available remaining capacity, before infrastructure will be in place undeveloped suburban lands are concurrent with development. utilized. 3-9, Areas not suitable for urban Yes The project site will remain in its development because of the lack of present use until the needed availability of public facilities shall infrastructure is provided pursuant to remain in their present use until the the capital improvement and needed infrastructure is or can be development fee programs. assured of being provided. 3-11, Urban uses shall be expanded only Yes The project will be within an urban within an Urban Limit Line where Limit Line, and conflicts between conflicts with the agricultural the project and agricultural uses are economy will be minimal, expected to be minimal (see Section D). 3-12. Preservation and buffering of No Development of the project will agricultural land should be result in the loss of 751 acres of encouraged as it is critical to agricultural open space land and the maintaining a healthy and wildlife habitat and scenery afforded competitive agricultural economy by this land. Only 58 acres of the and assuring a balance of land uses, site is considered prime farmland. Preservation and conservation of ripen space, wetlands, parks, The scenerypprovided by the hills on hillsides and rid ellnes should be the site will be substantially altered encouraged as it is crucial to by planned grading of ridgetines and preserve the continued availability hillsides and the development of of unique habitats for wildlife and dwellings on the ridgelines and plants,to protect unique scenery and hillsides. provide a wide range of recreational oppominities for County residents. Michael Paoli and Associates C-21 TABLE C-2 continued PROJECT CONSISTENCY WITH APPLICABLE CONTRA COSTA COUNTY GENERA.PLAN LAND USE POLICIES Policies Consistent Discussion 3-14. Protect prime productive agricultural No As described under 3-12 above, the land from inappropriate 58 acres of orchards are prime subdivisions. farmland. In general, however, the land in the western portion of the Brentwood planning area is of lesser quality for agricultural use than land in the southern and eastern areas. This is a maj or factor in encouraging growth in this direction rather than within the County's agricultural core to the south and east of Brentwood. t _ a . x C-22 Michael Paoli and Associates r e Mitigation Measures No mitigation measures are available for the project's inconsistencies with the specified policies. Level of Significance Because development of the project is contingent upon annexation to the City of Brentwood, the County's policies are relevant for information purposes and do not constitute a significant impact. i. Impact Inconsistencies with Contra Costa County's 1988 Measure C and 1990 Measure C In order for Brentwood to.receive street maintenance and improvement funds under the 1988 Measure C, it must have a growth management element in its general, plan:. The City's current general plan does not have this element, but one will be incorporated in the updated general plan scheduled for adoption in 1992. Although the City dries not have a formal growth management element at this time, it does have various development fees and capital improvement financing programs to insure the provision of adequate infrastructure and facilities for new development, including the proposed project. The proposed project site is within the Urban Limit Line established by Contra Costa. County as a result of the 1990 Measure C. Mitigation Measures To achieve full compliance with the 1988 .Measure C, the City will incorporate a growth management element in its updated General Plan. Level of Significance The above mitigation measure will eliminate any inconsistencies with the 1988 Measure C. j. Impact Inconsistencies with Government Code Section 56877 policies and priorities related to open space land Michael Paoli and Associates C-23 In considering the proposed annexation of the project site to the City of Brentwood, the Contra Costa County Local Agency Formation Commission must address the following provisions of Government Code Section 56377: In reviewing and approving or disapproving proposals which could reasonably be expected to induce, facilitate, or lead W the conversion of existing open-space lands to uses other than open- space uses, the (local agency formation) commission shall consider all of the following policies and priorities. (a) Development or use of land for other than open-space uses shall be guided away from existing prime agricultural lands in open-space use toward areas containing nonprime agricultural lands, unless that action would not promote the planned, orderly, efficient development of an area. (b) Development of existing vacant or nonprime agricultural lands for urban uses within the existing jurisdiction of a local agency or within the sphere of influence of a local agency should be encouraged before any proposal is approved which would allow for or lead to the development of existing open-space lands for non- open-space uses which are outside of the existing jurisdiction of the local agency or outside of the existing sphere of influence of the local agency. The proposed annexation of the project site appears to be consistent with Section 56377(a). The Brentwood General Plan encourages growth to occur in a northern and western direction from the downtown area in order to avoid encroaching into the prime agricultural area to the south and east of the City. The area to the south and east is shown as the County's "Agricultural Core" in the Contra Costa County General Plan. Although the project site contains a small amount of Prime Farmland, it is located west of downtown, in an area where most of the land is not classified as Prime Farmland and is mainly used for grazing. On its face, the proposed project appears to be inconsistent with Section 55377(b). Approval of the project would lead to the development of existing open space land for non-open space uses which is outside Brentwood's existing City limits and, for the most part, outside the City's Sphere of Influence. Due to its fringe-area location, the project does not support the policy of encouraging development of land already within the City and its Sphere of Influence. However, it should be noted that the City requires all projects of this nature to participate in a Capital Improvements Financing Program (CIFP). These programs effectively provide for a phasing of development as necessary services are financed and able to be provided. This project is within CIFP 91-1, which is the third CIFP to be established. The projects within the first and C-24 Michael Paoli and Associates M second CIFPs are within the City limits and will likely be constructed prior to these projects in the third CIF'. The CIFP requirement effectively encourages land within the existing City limits and Sphere of Influence to develop prior to land outside the existing City limits and Sphere of Influence. Mitigation Measures No mitigation measures are required. Level of Significance This impact is not potentially significant. k. Impact Inconsistencies with ABAG Regional Ilan 1984 policies related to expansion of a jurisdiction's sphere of influence The policies listed by ABAG staff as being applicable to expansion of a jurisdiction's sphere of influence are Policies A.I. and A.S. in the 'Regional Strategies section of ABAG's Regional flan 1980. A.I. The Bay Area and its communities should be organized in a City-Centered Region. A.S. Controlled development areas should be located around the urban fringe of each community to provide, if needed, holding zones to permit the orderly extension of urbanization. Land scheduled for early use should be released in units of neighborhood size or larger, and unified planning and design concepts should be applied in order to prevent wasteful, unattractive, and ecologically damaging scattered development. The proposed project site appears to be consistent with Policy A.l. The project is proposed to be developed as part of the City of Brentwood and not as an isolated, unincorporated area. The project appears to be consistent with the first part of Policy A.8, regarding the creation of holding zones to permit the orderly extension of urban development. The reasons for this conclusion are the same as described for Government Code Section 56377(b) in Impact i and are based upon the City's CIF'P requirements. The project site has been master planned and would be developed as an integrated unit under a unified planning and design concept. This will avoid wasteful, Michael Paoli and Associates C-25 unattractive, scattered development and should minimize, to the extent possible, ecological darnage. Mitigation Measures ' f No mitigation measures are required. Level of Significance , This impact is not potentially significant. { 1. Impact Approval of the project will 'freeze' the land use ordinances, policies, and standards applicable to the project FV The project contemplates both a development agreement under Government Code Sections.65864 et secs. and a vesting tentative subdivision map under Government Code Sections 66498.1 through 66498.9. The development agreement would grant the Applicant the right to proceed with development of the project in accordance with the ordinances, policies, and standards in effect at the time of its execution. In return, the City can impose conditions of approval on the project beyond those normally permitted by law. , ' The vesting tentative map will similarly give the Applicant theright to proceed under those ordinances, policies, and standards in effect when the map ` application is deemed complete. The City necessarily loses some ability to subsequently modify a project when it grants a property owner vested' rights. However, the City has required a t development agreement for this and other new development projects in order to impose fees to finance the City's Capital Improvement Financing Program. The 4 project will be governed by the City's new General Plan, once adopted, which will contain the City's longterm planning and growth policies, minimizing the practical effects of granting the Applicant vested rights. p h Mitigation Measures No mitigation measures are required. Level of Significance 4 This impact is not considered to be potentially significant. 4 C-26 Michael Paoli and Associates 3. CUMULATIVE IMEACIS AND MUMATION MEASURES a. Impact Cumulative change of 9,810 acres ,from primarily agricultural uses to unbar: uses Buildout of the General Flan area in accordance with the cumulative development scenario would result in-a change in-land use of about 9,800 acres used primarily for agricultural poses to urban uses. This change would result in the development of an additional 13,664 dwelling units and a papulation increase of 41,757. The cumulative change in land use and resulting increased population would impact local and regional resources and conditions, including agricultural resources; biological resources; traffic and transportation; air quality; noise, storm drainage and flood control; water supply; wastewater collection, treatment, and disposal; solid waste, hazardous conditions; law enforcement; fire protection and emergency services; schools; parks and recreation; energy resources; aesthetics and views; and cultural resources. The potential impacts are described in the subsequent sections of this EIR. Mitigation Measures Mitigation measures for the cumulative impacts are set forth in the subsequent sections of this EIR. Level of Significance The mitigation measures can reduce a number of the cumulative impacts to a level of insignificance. However, as described in the subsequent sections, some of the impacts cannot be effectively mitigated and, therefore, are considered unavoidable and significant. Michael Paoli and Associates C-27 SECTION D AGRICULTURAL RESOURCES SETTING, IMPACTS, AND MITIGATION MEASURES 1. SEITINQ a. Current Agricultural Land Use The project site is currently used as rangeland for grazing cattle, with the exception of 58 aures in the northeast portion of the site that are planted in walnuts. The surrounding land is also agricultural in character. The predominant activity is gazing, with open range to the south, west, and north. Properties to the east and northeast are planted in orchards and row crops (see Figure C-1 in the Land Use,section). b. Soils There are six main soil types within the project area, and four other soil types are also represented in lesser quantities (see Figure D-1). The characteristics of the major sail types as described in the U.S.D.A. Soil Conservation Service, Soil Survey of Centra Costa County, 1977 are listed here: BdE: Briones loamy sand, 5 to 30 percent slopes, U.S. Capability Class VIe-1. Included in this soil unit are small areas of Gaviota and San Ysidro foams. This soil is appropriate for range use and homesites. AcF: Altamont-Fontana complex, 30-50 percent slopes, U.S. Capability Class Vle-1. Approximately 15 percent of this complex is composed of loams and clays from the Millsholm, Lodo, Capay, and Rincon series. This soil is used mainly for rangeland. RbA: Rincon clay loam, 0 to 2 percent slopes, U.S. Capability Mass IIs-3. Included in this soil unit are small areas of Brentwood clay loam, Capay clay, and San Ysidro loam. This soil can be used for irrigated crops. Pb: Pescadero clay loam, U.S. Capability Class IVw-6. Small areas of Clear Lake clay are included in this soil series. This sail is used for pasture and homesites. Cak Capay clay, 0 to 2 percent slopes, U.S. Capability Class IIs-5. Included in this soil unit are small areas of Rincon and IN ichael Paoli and Associates D-1 "KaC Rb A. CaA BdE AbD Pb bA Y AcF BdE AcF Pb AbE KaE ' ` • KaC s �BdE .-BdE BdE: Briones loamy sand', 5 to 30 percent slopes Acl~: Altamont-Fontana complex, 30-50 percent slopes RbA: Rincon clay loam, 0 to 2 percent slopes Pb: Pescadero clay loam CaA: Capay clay, 0 to 2 percent slopes ; Ab10: Altamont clay, 9 to 15 percent slopes AbE: Altamont clay, 15 to 30 percent slopes KaC: Kimball gravelly clay loam, 2 to 9 percent slopes Source= SQ91 Suer.&X cif KaE: Kimball gravelly clay loam, 9 to 30 percent slopes onsQ9 Q=, 1977. BdF: Brlones loamy sand, 30 to 50 percent slopes Michael Paoli and TYPES OF BOIL ON PROJECT SITE FIGURE l0-1 Associates Brentwood clay loams and Marcuse clay. This soil is suitable for some agricultural craps. AbD: Altamont clay, 9 to 15 percent slopes, U.S. Capability Mass 'V'IIe-l. This soil unit includes small drainageway areas composed of Capay and Rincon soils. Fontana and Linne soils are also represented. This soil is suitable for range and some grain craps. The U.S.D.A. Soil Conservation Service Soil Candidate Listing for Contra Costa County lists soils that have the potential to qualify as Prime Farmland and Farmland of Statewide Importance. Prime Farmland is land which has the best combination of physical and chemical characteristics for the production of crops. Farmland of Statewide Importance describes land other than Prime Farmland which has a good combination of physical and chemical characteristics for the production of craps. For land to officially be classified as Prime Farmland or Farmland of Statewide Importance, it must have been used for the production of irrigated crops within the last three years (California Department of Conservation, 1988). Capay clay and Rincon clay loam are listed in the Soil Candidate Listing for Contra Costa County as potentially qualifying as Prime Farmland. The northern approximately 180 acres of the site consists of these soils. The 58-acre walnut orchard within this area, since it is irrigated cropland, qualifies as Prime Farmland. The.remainder of the land is used for grazing. Altamont Clay, which underlies the proposed school site, is listed as potentially qualifying as Farmland of Statewide Importance. This land is not irrigated cropland. Figure D-2 shows the Prime Farmland and Farmland of Statewide Importance within the Brentwood Planning Area. C. Williamson Act Contract Lands The Spanos site is currently held in a Williamson Act contract (see Figure D-3). Land directly south of the project area is also held in a contract which is due to expire in February 1996. A large parcel northwest of the project area is held in a contract for which no notice of non-renewal has been filed. A small parcel east of the project site, but not contiguous with its borders, is also held in a contract. The contract for another small parcel east of the project site expired in February 1991. A Notice of Non-Renewal of the contract holding the Spanos site has been filed with the City of Brentwood, and the contract is due to expire in February 1999. Should earlier cancellation of the contract become necessary, the lave allows for such cancellation, subject to the City of Brentwood making the findings specified Michael Paoli and Associates D-3 + dry , § *; t•. '; -• y�j �!� t� 3 icy � ,l • 1� �'!',1�!1 1 t• 1 t ,+ �-„ !,,,4�+1,;,s„t,�r f• t, �.*� .1 � r 31 V Noe I > ` ILI >.1 ! r �•/L•-/1,./1,./1 , J,;/, „ /1>/1 Lady; rl�,•l , ,!\ >� /\ tt:ttt¢ 1►y J}■l�f*/�\/1 Y +'it t 2_�,j� ••' Bre t t[•7(ti,J V t Sit t a• ..•/t Jrmar t,`, F 81four did. k N. Ott project Area F r , s `�! ` %i.� ! . ?” U. . . . �,. Planning Area Boundary LaaQ Fw [ 7G Prime Farmland Grazing Land firs Farmland of Urban and Statewide Importance Built-up Land rT Unique Farmland El tither Land ' ' � �s •.� Farmland of 0 2 miles � FTILocal Importance "."". source: Dept.of Conset'vallon Base Map 6t90 , Michael Paoli PRIME I=ARIVILAND IN and FIGURE D-2 Associates THE BRENTWOOD AREA P� i coLU FIJ „ 4: d�, , as.N,...,... uA. a,,. Y µms, ., t i ........_..._...'.. K"' "C ZX, „� /mow � �'ytr ,.. .. :�•. �r ... Ln cc !5 9 ` �.;,iS..:;,�` .'," 'fit � .;�----# �' ; •.. L' rd� �`.'� h✓ l70! r f J • 4 cjw ♦\ r[ i� ipiNri � t 'y� NNN LU i .. ! �.�•�, '�`�dw 1 4 D JY +.-� jr. � fin. ut :• n .•:d ,v:�.:ti d +rr :s rd rJ.r t 2 � � # s ' ,r r \v. ti{r:"�r 1 rr., ,{J �✓ t /.: ' � r ' d ...�._.._.._,,,�•w r :•. .CJS• * %. �" J.,.,, #f�+"i a y.,,a \,+f. Yil t / 44i wY ....... in Subsection 2 and providing that a penalty of 121/2 percent of the property's fair market value is assessed. 2. WILLIAMSQN ACI CONTRACT --C-ANCELLATIQN a. General In order to allow cancellation of the Williamson Act contract, the City of Brentwood must find either that the cancellation is in the public interest or that it is consistent with the intent of the Williamson Act. The specific findings that must be made pursuant to Section 51282 of the Government Code are listed below, along with a discussion of each relative to the project. b. Public Interest Findings In order for the City of Brentwood to find that cancellation of the contract is in the public interest, it must find that: Finding a: Other public concerns, such as the need for housing, outweigh the objectives of the Williamson Act. Discussion of a: Projections developed by ABACG indicate that the population within Brentwood's Sphere of Influence will increase from 9,300 in 1990 to 28,400 in 2005 (ABAG, 1989). Full development of the General Plan area, excluding the proposed project and other projects not currently designated for urban development, would result in a population of approximately 39,000. Based upon these numbers, the need for housing in the Brentwood area could be accommodated without the proposed project for the foreseeable future. The City of Brentwood is in the process of updating its General Plan. The updated General Plan is intended to provide for growth within the Brentwood planning area to the year 2020 and a buildout population of between 73,000 and 107,000. Finding b: There are no proximate, non-contracted lands which are both available and suitable for the use proposed for the contracted land, or development of the contracted land would provide more contiguous patterns of urban development than development of proximate non-contracted land. D-6 Michael Paoli and Associates C k # . Discussion of b: ` There are at bast 800 acres of proximate, non contracted land east and north of the project site that could accommodate the uses proposed for the project. This land is the subject of two separate development proposals and is not available for use by the project proponent. The non-contracted land to the west of the site could potentially accommodate the uses proposed, however, this land is outside the City's existing planning area and Sphere of Influence and development of this land would represent a discontiguous pattern of urban development, C. Williamson Act Consistency Findings In order for the City of Brentwood to find that cancellation of the contract is consistent with the purposes o the .Act, it must find that: Finding a: The cancellation is for land on which a notice of non-renewal has been served pursuant to California Government Code Section 51245. Discussion of a: A Notice of Non-renewal has been served for the subject property in November 1989 pursuant to California Government Code Section 51245. Finding b: Cancellation is not likely to result in the removal of adjacent lands from agricultural use. Discussion of b. The potential of the project to induce urban development on adjacent agricultural land does not appear to be substantial. The land being cultivated for crops east of the site is within the current City limits, is designated for urban development by the General Plan, and is the subject of a pending development proposal. This area could develop prior to the project site. The land to the north of the project site is also the subject of a pending development proposal. Rangeland to the west and south of the site is being considered for urban development as part of the City's General Michael Paoli and Associates D-7 .waw Plan update. Development of the project site could enhance the potential for urbanization of properties to the south and west by making these properties contiguous to development. The potential for urbanization of the properties to the west and south would appear to be more dependent upon policy decisions to be made as part of the pending General Plan update than upon the development of the project site. Finding c: Cancellation is for an alternative use which is consistent with the applicable provisions of the City or County General Plan, Discussion of c: The City and County general Plans designate .most of the project site for agricultural use. The project site proposes an amendment to the Brentwood General Plan to allow for urban development and is under consideration for urban development as part of the City's General Plan update. Finding d: Cancellation will not result in discontiguous patterns of urban development. Discussion of d. The project site is discontiguous from existing urban development. All of the land along Balfour Road between the existing developed portion of the City and the project site, however, is designated for urban development and most of this land is the subject of pending development proposals. Therefore, removal of the contract may not result in a discontiguous pattern of urban development. Finding e: There is no proximate non-contracted land which is both available and suitable for the use proposed for the contracted land, or, that. development of the contracted land would provide more contiguous patterns of urban development than development of proximate non contracted land, Discussion of e: 4 Refer to Discussion of Finding b, Subsection 2, b. f D-8 Michael Paoli and Associates # R' 4 3• GS PROJECT IMPACIS AND MITIGAITON MEASURE a. Impact Conversion of 693 acres of grazing land and 53 acres .of prime farmland to urban and open space uses Development of the project will result in the conversion of 693 acres of grazing land and 58 acres of cropland currently being cultivated for walnuts to urban and open space uses. The walnut orchard is designated Prime Farmland. This is a significant impact. Mitigation Measures No mitigation measures are available. Level of Significance This is a significant unavoidable impact. b. Impact Loss of agricultural craps:. walnuts and rangeland for livestock Information provided by the Contra Costa County Department of Agriculture in its 1990 Agricultural Deport provides a basis for estimating impacts related to the loss of drops and rangeland within the project area. Within- Centra: Costa County, 1,680 acres of land were cultivated for walnuts in 1990. The loss of the 58 acres on the project site, therefore, would represent a lass of 3.5 percent of the total acreage cultivated for walnuts. By 1990 standards, this represents lass of 39 tons of walnuts whose value at $944 per ton would equal $36,684. The conversion of 693 acres of grazing land on the project site to urban and open space uses represents a lass of 0.39 percent of the 179,000 acres of rangeland in use in Contra Costa County in 1990. This represents a value of about $14,497, out of the estimated 1990 total gross value of $3,746,000 resulting from rangeland operations within the County in 1990. Information from a report on the Economic Impact of Agricultural Production in Stanislaus County (Sarquis, 1981) can be used to develop an estimate of the total economic value of the production and processing of the agricultural products from the site. The report indicates that the weighted average economic multiplier for walnuts is 3.2. Multiplying the total value of the walnuts grown on site, $36,684, by 3.2, results in an economic impact of $117,389. The weighted average multiplier for livestock was listed as 1.8, resulting in an Michael Paoli and Associates D-9 economic impact of $26,095 for the 'grazing land. The total economic impact, or loss, for all agricultural products resulting from the conversion of the project site to urban uses, therefore, would be $143,484. Mitigation Measures No mitigation measures are available. Level of Significance This is a significant unavoidable impact. c. Impact Potential conflicts between urban uses on the project site and adjacent agricultural uses The conversion of the project site to urban and open space uses could have impacts on surrounding agricultural land related to pesticide use; dust; trespassing, vandalism, and litter; and noise and light. As described below, the potential for these impacts is not significant, primarily because most of the surrounding land is used for grazing, a relatively non-intensive agricultural use. The only intensively farmed land is located east and northeast of the site. This land is planned for urban development, and an application for its development is currently being processed by the City of Brentwood. The existence of a residential project could lead to restrictions on the application of agricultural pesticides on adjacent farmlands. The term "pesticide" is a general classification that includes fungicides, herbicides, insecticides, and rodenticides. The amended federal Insecticide, fungicide and Rodenticide Act of 1972 regulates the formation, registration, labeling, distribution, and use of pesticides in the United States, Pesticides must be labeled according to toxicity Category T, II, III or IV. Category I is the most toxic and Category IV is the least toxic. Pesticides must also be classified for either general or restricted use. General use classification is allowed when the pesticide will not cause unreasonable adverse effects on the environment, Restricted use classification is required if the pesticide may cause undesirable effects without additional regulatory restrictions. Before restricted pesticides can be used, the applicator is required to obtain a "Restricted Materials Permit" from the Contra Costa County Department of Agriculture. Prior to issuance of a permit, factors such as temperature, wind speed and direction, time of year, and adjacent land uses are considered. The Department of Agriculture requires that pesticides utilized on farmland adjacent to any residential development be applied in such a manner as to confine the substance to the target area only. Citations for violating this regulation are D-10 Michael Paoli and Associates issued by the Commissioner's office. The most efficient method for keeping pesticides away from residential developments is carefully directed spraying that only makes contact with the plant material and does not become windborne. All pesticides, both restricted and unrestricted, are controlled by the Commissioner's office through operator identification numbers and special permits (Stout, 1991). It should also be noted that under the requirements of Section 25249.6 of the Safe Drinking Water and Toxic Enforcement Act of 1986 (Proposition 65), no one can be exposed to a chemical listed in the act without an adequate warning. The liability, or potential, for having to comply with this requirement already exists in the vicinity of the project site as well as in every ether area in California where agricultural and urban uses are in proximity to each ether. Restricted pesticides are normally not applied to grazing lands. Pesticides that Could be applied to grazing lands include non-restricted herbicides utilized to control weeds, and restricted pesticides such as 2-4_D and grain bait (placed underground and used for rodent control), including Aluminum Phosphide, Zinc Phosphide, and strychnine (Edwards, 1992). Restricted pesticides may be applied to the cropland east and northeast of the project site and Concord Avenue. As previously noted, this land is planned for urban development and is the subject of pending development applications. Dust from adjacent agricultural activities could create nuisance conditions which lead to complaints from residents. Dust may be generated by a number of agricultural operations, such as discing, plowing, and harvesting. Since most of the land adjacent to the project site is rangeland, and is not normally disced, plowed, or harvested, dust is not anticipated to be a substantial problem. The potential would exist for residents to trespass, litter, or vandalize nearby agricultural lands. This is a common problem on agricultural lands that are in close proximity to residential subdivisions and results in an economic loss to the farmer. The development is separated from agricultural lands to the east by the existing Concord Avenue, along whose right-of-way the proposed Delta Expressway would be built. As mated previously, this land is within the current City limits and is designated for urban development. Agricultural land to the south, west, and -north is open rangeland. Balfour Avenue, designated as a thoroughfare in the General Plan, would separate the property from rangeland to the north. Substantial open space buffer areas are provided along the southern and western boundaries of the site. Wherefore, the potential for such nuisances to occur is limited. Agricultural operations can be a source of noise and headlight glare from the operation of tractors and other equipment which may be regarded as an annoyance or distraction by residents of a residential subdivision. Since there is Michael Paoli and Associates D-1 I no intensive agriculture adjacent to the planned residential areas of the project site, the potential for noise and glare impacts appears to be minimal. Mitigation Measure All home buyers within the project shall be provided with a "Notice of Agricultural Use" that identifies the possible conflicts between residential and agricultural uses in accordance with City policy. Level of Significance This impact is not considered to be significant. 4. a. Impact Cumulative conversion of agricultural lanai to urban uses Full development of the Brentwood General Flan and the projects considered in the cumulative analysis would result in the development of about 9,800 acres, a substantial portion of which is used for agricultural purposes and designated as Prime farmland on the Contra Costa County Important Farmland Series Map (Department of Conservation, 1990). This is considered to be a significant unavoidable adverse impact. Mitigation Measures No mitigation measures are available. Level of Significance This impact is considered to be significant and unavoidable. 3 3 U-12 Michael Paoli and Associates 1 a SECTION E TOPOGRAPHY, GEOLOGYo SOILS, AND SEISMIC HAZARDS SETTING, IMPACTS, AND MITIGATION MEASURES 1 . E; :G An initial geologic and soil reconnaissance study was prepared by ENGEO, Inc. for the Applicant in November 1989. Additional studies of the coal mine area, groundwater, liquefaction, and seismic conditions on the Spanos site followed in 1990 and 1991. This section is based on the information, conclusions, and reconunendat ons presented in ENGEO's studies. a. Topography A topographical and aerial view of the site is presented in Figure E-1. The northern portion of the site is characterized by a gently eastward sloping alluvial plain. The central and southern portions of the project site contain ridges with intervening valleys. Because the geologic structure of Mt. Viably tends to control the alignment of geologic structures to the east and northeast of the mountain, including the project site, these ridges and valleys trend northwest and west. Three primary drainage courses lie on the project site: Deer Creek to the north, Dry geek near the southern property line, and an unnamed tributary drainage course to Dry Creek in the central property area. Elevations at the site range from about 125 feet above mean sea level at the northeast property corner to 375 feet near the southwestern corner of the project site. The highest of the intervening hills on the property rises to approximately 360 feet above mean sea level. b. Geology The bedrock that forms the foundation of the project site has been uplifted by the eastern flank of Mt. Diablo. The bedrock trends to the northwest and is gently dipping to the northeast. Mt. Diablo also affects the trend of fold axis and faults, which is generally northwest-southeast. The northern portion of the property, characterized by a gently eastward sloping alluvial plain, is underlain by gravel, sand, silt, and clay mantling the bedrock. The hilly central and southern areas are underlain by Tertiary-aged bedrock, including the Domengine sandstone, the Nortonville shale, the Markley Michael Paoli and Associates E-1 �.rR �f�- .c e .�✓..` Iii ..- . �. � � � � r Y � ' ,t x' f 4.S� •1 e D b n?'E it3C -� A> x t# f� t 1 formation, and the Meganos formation. Colluvial and alluvial deposits mantle t the bedrock in certain locations (see Figure Ew2). i C. Soils Soils on the project site.consist primarily of six sail types: Altamont-Fontana complex, 30 to 50 percent slopes (AcF); Brionos loamy sand, 5 to 30 percent slopes (BdE); Rincon clay loath, Q to 2 percent slopes (RbA); Pescadero clay . loam (Pb); Capay clay, 0 to 2 percent slopes (CaA); Altamont clay 9 to 15 percent (AbD) (U. S. D. A., -1977) (see Figure D-1). A -majority of the project site is covered by the Altamont-Fontana complex (AcF), Briones loamy sand (BdE), or Rincon clay loam (RbA). The Altamont-Fontana complex, 30 to 50 percent slopes (AcF), is generally mapped in the hilly southwestern portion of the project site. It consists of about 50 percent Altamont clay, 35 percent silty clay town, and 15 percent a mixture of clays and loams. This complex is typically well drained and underlain by shale and soft, fine-grained sandstone. Where soils are bare, runoff can be expected to be medium to rapid and the hazard of erosion moderate to high. This complex is classified CL, indicating that it is highly expansive. It has Plasticity Indices ranging from 25 to 30 and Liquid Limits between 40 and 50. Briones loamy sand, 5 to 30 percent dopes (BdE), is generally mapped across the central and eastern portions of the site trending northwest to southeast. These soils are well drained, with medium to rapid runoff and a moderate to high hazard of erosion. Briones loamy sand is non-plastic, with a. low expansion potential (classified SM). Rincon clay loam, 0 to 2 percent slopes (RbA), is snapped across the northern portion of the project site. These soils are formed in alluvial valleys and are well drained. Rincon clay loam is a moderately expansive soil, classified CL. It has Plasticity Indices ranging from 10 to 34 and Liquid Limits from 34 to 40. Small areas of the following soil types are also found on the site: Altamont Clay, 15 to 30 percent slopes (AbE), Kimball gravelly clay loam, 2 to 9 percent (KaC) and 9 to 30 percent slopes (KaE); and Briones loamy sand, 30 to 50 percent slopes (BdF). The estimated sail properties of the remaining site soils are summarized on Table E-1. Michael Paoli and Assotes E-3 __ �rr= 15 f t ( SC3tfrw'RN PORTION O'C •} #+Wi �. + r 31(" ALQUISr-PPtOLO ZONE ALONG DAVIS )rAU0 60 0 SHE'RMAN ISLAND Tmr r* is + FAULT TREND t fA�APpED BY OTHERSI� t'k•ixf1T j y !.r ao�...me...... t Q '+.�• t AOAftZ' &stion oyfne ITTE FAULT OBSERVED AT . J:ilr... •"5 "' r DEPTH IN COAL sUlki I SHAFT (1887). 0 ,S � ,ti " l r i, • j r t >,=; ,,•-° •3 t i�. ``,� '•>•:a'�`.4 r sr� ya ;'h,. a,`"'.'.. ',yit � l U. C` y ( L1 980+� s • "' S - B �`` # Tme S 1 + ="r•� 'r�[?� � A B Pith Station tis CCM' EXPLANATION � .�-.,.•••-.. t•'xvLr—DxsHED � TH�EEt1tSD. uARxtsY rc►rnuTtoN; toR sArmyrr� DOTTED THERE Ct1NL"EAtNEf#, Trot u�ER, TtNWLY BEDDED xtm stt.T=n U DENOTES UPWARD PM ATME AND iR1momt, iiARtME WOVUENT. D m DOWN ,•- CONTACT-DASHED KEtERE GRA- Tnv CRtEN GE.tYS`rc1 �t##t�R��tLFS7 �E� RATIONAL OR APPFtC1JGyGiTELY LOCATED Td wuENam sA1fwTo?'C• U)mrmm. �tAxstts L t:ATEf)J FORitA'"09, Dt1 V01f E: MUMXM GRAY Cyst SM'r A" CtAy �`AND PLEMM E) 0 T111e N t OM. X00 rw i`�i M ALLUYt{fJt A N Coct Arra VtcnrrtY C"Mm=ANO3 !•CRUA7"` DmmoR D: tsc"T CRAY # HococU AND rs s ra YttVfiCER Tmd 'AnSTOM CAmmCSGVS Lt>mboNs ARE (HoloTu A uABp a PL7t ro Vir) C{SStM N, PMLS C13NS7t.AutBATL. LWAId.Y AT fHo AND tJPpER pLtts7t3LEltE} HAIL MAitt?M tw-900. 7 ocx Q O r G OLDVVICY rtt.�.LtMST or 1iA Rs3f C$E f AND sesr: SAAN f a t AL, c a r r wiCi3t'tTY jPtElSTOCI"2tEt 4rw,4 , ryrtp DlbBta`#. r�aa Michael Paoli and GEOLOGY MAP FIGURE E- Associates c tA LA c ' y b rA CA 48 8 8 x x z Lvh vtvAr d. Seismic Activity and Hazards (1) Seismicity The major fault zone in the Brentwood area is a northwest to southeast trending zone of faulting called the harsh Creek/Greenville fault zone that extends at least as far south as the Livermore 'Valley and as far north as Carquinez Strait. This zone of faults includes, from north to south, the Clayton Fault, the Marsh Creek and Morgan Territory faults, and the Greenville Fault. The Greenville fault was the source of two significant earthquakes which occurred in January 1980. These earthquakes, measured at 5.3 and 5.9 on the Richter scale, produced surface rupture cracks near and along Vasco Road, ground shaking at the site, and possibly minor structural damage in Brentwood. Prior to those earthquakes, it was believedthat the primary'movement on this zone of faults was thrust faulting, with rocks east of the fault thrusting west. However, in the January 1980 earthquake, there appeared to be a component of right-lateral strike slip displacement. No faults in the immediate vicinity of the project site are classifiers as active by the U. S. Geological Survey or the California Division of Mines and Geology. The nearest confirmed active faults are the Antioch, Greenville, and Concord faults, located 4 miles northwest, 10 miles southwest, and 16 miles west, respectively (see Figure E-3). Other active and potentially active faults that could affect the eastern Contra Costa County area include the Calaveras fault (20 miles southwest), and the San Andreas fault (approximately 48 miles west). The Midland fault, located about b miles east of the site, is thought to be a steeply dipping normal fault. Data made available from oil and gas exploration suggest that it has not moved since Eocene time. The Brentwood-Sherman Island fault system passes along the eastern edge of the site. The location of this fault system is fairly well defined in exposed bedrock near Los Vaqueros Dam, but becomes buried by alluvium northward in the direction of the project site. ENGEQ trenched across the mapped trace of this fault in 1989 for another project, The results of that exploration and other recent research and information indicate that the fault trace is located approximately 8010 feet west of its mapped location. This would place the fault within the project site along its eastern edge (see Figure E-2). It is inferred to be potentially active on the basis of scattered small magnitude earthquakes near the trace. Several hundred feet to the west of the Brentwood-Sherman Island fault trend lies another fault, the Sesnon fault. The presence of this fault is inferred from oil exploration data and an 1887 report by a California State Mineralogist who discovered it at the bottom of the mine shaft on the project site. This fault is thought to be inactive. E-6 Michael Paan and Associates 1899scieurrxry fd�.4 9 1989 i� � ' 892 ? W sir.u .s { c ♦#m n 0 Al t r 891 r" t++ ,is . � 1936 U49 SITEJ .. 183 1955 Mf.3 Y' UTQ M5.4 #9$ Wrx M5.9 19$0 14 0 1980 � u4.5 � X5.3 t 9S3 g8 g� �'d tA7.fl � �fi� o MAM OO P14 '1 'I C yx '` .4 /� + L �s1V t87flug Or� asr #5184 s45. y� U6.2 Cl yys' t^t 11 49 C', y Mux a'a r .4tso�„grcrr � a o sgo Q�acusrsu i Wily )EXPLANATION SUV XIT'LAANA'T'ION #Tiff ACL" 8f1'SL#R8 OR CNMVIX r o .. A ArPkomwsa twAmom or rrtcrieli x, aff0 a YW or OCCUM xcs OW iUC #ucnr=E Michael Paoli and REGIONAL FAULTING AND SEISMICITY FIGURE E-3 Associates The Antioch fault and its branch, the Davis fault, are the only known active faults near the project site. A splay or branch of the Davis fault passes through the southwestern tip of the subject site. Although not well explored to date, this branch fault is inferred potentially active on the basis of scattered small magnitude earthquakes near the trace. leo development is planned within 1,1300 feet (approximately) of this branch of the Davis fault. (2) Seismic Hazards Seismic risk from an earthquake depends on the distance of the structure from the epicenter of the earthquake, as well as from the fault itself. Other factors that influence the strength of the earthquake at a particular location include the intensity of the earthquake, local geological features, and groundwater and sail conditions underlying the site. The damaging effects of earthquakes are classified as primary and secondary. Primary effects include ground shaking and .ground rupture, also known as surface faulting. Common secondary effects include ground failure (caused by soil liquefaction), lurch cracking or lateral spreading, landslding, and regional subsidence or uplift due to ground shaking. The project site is located on the edge of the seismically active San Francisco Bay area, which is prone to earthquakes (see Table E-2). It must be assumed that one or more of the faults will move during the life expectancy of any construction on the site. The maximum probable earthquake for the region can be reasonably associated with the San Andreas fault, an active crustal plate boundary. It is anticipated, based on earthquake recurrence data, that during the effective life of the project, one major earthquake (?.(l or greater on the Richter 1 scale) and several moderate earthquakes (5.0 to 7.4 on the Richter scale) will occur within the San Francisco Say or San Joaquin Valley regions of California ('T'able E-3). e. Other Geotechnical Considerations Other geological factors to be considered include the strength and expansive quality of surface soils on the project site, slope stability, the possibility of flooding and the project's impacts on ground and surface water conditions, and settlement of the surface over the mine shaft. These will be considered in greater detail in Subsection 2, Project Impacts and Mitigation Measures. 2. a, Impact Potential for damage from primary effects of seismic activity y E-8 Michael Paoli and Associates x r r t . x w H 00 'ICA �g c ; 1 ° , aE 45 V W ' ` rot . Ci °cUl ri � w cry cr; rw w �. 00 x r too 00 ;tom sa LA t . � ... � to ,..► •,a c A �rtj+ .tom c w ct` tj00 00 CN o ir 110 00 pp LA ON as 'Olt 00 ILA 00 r oc tea 00 w cc w W w 00 tea b, 4- C) LA Ww . P P c c w• 00 46 w w cs vz It is likely that during the life of the project site, a large earthquake will occur along one of the active faults in the Sari Francisco Bay area. Moderate to severe ground shaking is likely to be the primary effect of such an earthquake on the project site. Structural damage due to ground shaking is caused by transmission of earthquake vibrations from the ground into the structure. There is only a minimal passibility that surface rupture would occur on the project site. Three potentially active faults exist on the project site: Davis on the southwestern tip, and Sesnon and Brentwood-Sherman Island along the eastern boundary. In 1990, ENGE4 performed exploratory trenching across the mapped traces of these faults,but no sign of active faulting was found. A seismic reflection study was performed near the two eastern faults. This revealed two possible bedrock faults at depth. South of the project site, the Brentwood fault is reported to have had four small earthquakes ranging from Richter magnitude 1.4 to 1.7 in 1972. The earthquakes produced no surface offset, so the Brentwood fault is not considered to be active but has the potential to be active. The exact locations of these faults as they cross the project site have not been determined by trenching or seismic reflection. The probable alignment of these faults has been determined by mapping the connections between their known locations. However, no evidence of active faulting has been found on the project site. Mitigation Measures (1) The ground shaking hazard can best be mitigated by careful structural design conforming to current building codes. As a general guideline, it is suggested that structures in the Delta area shall be designed for ground accelerations of 0,25g to 0.5g omitting amplification or damping effects. More detailed seismic design data may be developed for special structural design and high risk structures on the project site. (2) Unless critical or high occupancy structuresE-f are proposed in mapped Brentwood or Sesnon fault alignments, additional seismic hazard studies are not recommended for the site. However, as is typical in all site development, a geologist shall view all significant cut slopes during grading. (3) The school site shall be studied further for the purpose of seismic design, and reference shall be made to the Brentwood Seismic Safety dement E`tAs in "critical installations such as ernerpocy facilities, public buildings, major utility lines, communication and muisportation facilities,and water retention structures"per the Seismic Safety Element of the Brentwood General Plan: Michael PaoH and Associates E-11 (currently under revision) regarding their policies on acceptable risk for potentially active on-site faults. Level of Significance The above mitigation measures will reduce this impact to a level of insignificance. b. Impact Potential for damage from secondary effects of seismic activity The secondary effects of liquefaction, lurch cracking, and settling are related to soil and groundwater conditions. Regional uplift, another possible secondary effect, takes place over larger areas because it is related to geological structures rather than surface features. The site would probably respond to such uplift as a unit, making damage from this cause unlikely. Soil liquefaction occurs when a loose to medium dense, saturated granular soil (sandor gravel) undergoes a rapid loss in strength due to an increase in pore pressure generated by shear strains within the soil mass. This behavior is most commonly induced by strong ground shaking. The sands on the project site are medium dense to dense. However, because the medium dense sands are not saturated, their potential for liquefaction is very low. Ground lurching is a rolling motion imparted to the surface from energy released during an earthquake. Such rolling motion can cause ground cracks. Lurch cracks rarely occur in solid rock. They are essentially confined to weathered rock, alluvium, and soil. Because the bedrock surface is quite shallow beneath most of the site, there is only a minimal probability that lurch cracking would take place during a major earthquake. The potential is higher at contacts between deep alluvium and bedrock. A moderate potential for this condition will exist at the project site at cut/fill margins, and at bedrock/alluvial margins. Earthquake-induced settlement of surface soils may occur to some degree at the project site. Cyclical shaking may collapse voids and cause the structure of the sands to become more compact. Mitigation Measures (l) A detailed soils exploration complete with test borings shall be conducted on the project site in conjunction with the preparation of final grading plans for each phase of construction. The report shall study slope stability as compared to final grading plans. It shall also provide appropriate recommendations for proposed earthwork and provide specific foundation design criteria. E-12 Nfichael Paoli and Associates b a (2) `uloids which remain near the surface due to mining activity shall be properly'sealed or removed. Level of Significance The above mitigation .measures will reduce these impacts to a level of insignificance. C. Impact Surface soils are subject to erosion Bedrock at the site generally consists of white to yellowish-gray sandstone and olive-gray claystone. The rock can be expected to weather rapidly when exposed to air and water, leading to a high erosion hazard. Mitigation Measure (1) Graded slopes shall be hydroseeded and landscaped prior to October 15 of the year following rough grading. All slopes on-site shah be maintained in a vegetated state subsequent to project completion. Levet of Significance The above mitigation measure will reduce this impact to a level of insignificance. d. Impact Surface soils are subject to a moderate to high potential for expansion Atterburg Limit tests have been run on surface samples of the soil on-site to test the expansiveness of the sail.. Plasticity Indices revealed a range between S and 39. These results indicate a moderate to high potential for expansion. Swell test results corroborate this finding. Expansive soils shrink and swell as a result of moisture changes, which can cause heaving and cracking of slabs-tin-grade, pavements, and structures on shallow foundations. Mitigation Measures (1) Building damage due to volume, charges associated with expansive soils shall be reduced by deepening the foundations to below the zone of moisture fluctuation (using deep footings or drilled piers), using footings Michael Paoli and Associates E-13 at normal shallow depths but bottomed on a layer of select fill having law expansion potential, or using a rigid mat or slab foundation which is designed to resist the movement associated with soil expansion. Successful construction with shallow foundations on expansive soils requires special attention prior to the installation of the foundation system. (2) The prevention of moisture variation shall be included in foundation. design. Level of Significance The above mitigation measures will reduce this impact to a level of insignificance. e. Impact Steep slopes are subject to landslides There are approximately ten landslides mapped at the site, Most of these landslides are not currently active. However, once the project is completed, sloping areas will remain and the possibility of future landslide activity, more likely as a result of earthquake than daily gravitational forces and soil saturation, must be addressed, Mitigation Measures (1) Site grading shall be oriented toward maximizing slope stability. Potential slides that may affect the proposed development may be stabilized using cut material from the tops of ridges, if so desired'. Suitable techniques include buttressing the existing area or removing the unstable mass and reconstructing the slope with engineered fill, keyways, and subdrains. (2) For preliminary design purposes, ENCEO recommends the following slope gradients. Cut slopes. Up to 10 :feet in vertical height 2:1 (horizontal to vertical) Over 10 feet in vertical height 3:1 (horizontal to vertical) Fill slopes. Up to 15 feet in vertical height 2.1 (horizontal to vertical) Over 15 feet in vertical height 3:1 (horizontal to vertical) 4 p y E-14 lvtichael Paoli and Associates k X Cut or fill slopes flatter than 3:1 horizontal: to vertical in excess of 30 feet in vertical height need not contain intermediate drainage terraces. Level of Significance The above mitigation measures will reduce this impact to a level of insignificance. f. Impact Collapse of existing mine shafts could cause ground subsidence The southeast portion of the project site contains two coal mining areas (see Figure E»4). Coal minim began on the project site in 1868 and was discontinued in the late 1810s when the mine did not prove economical. Four seams of coal were logged, the widest seven feet in thickness. Mining shafts and slopes were excavated into the coal outcrop on the western side of the hill. A much deeper shaft was sunk on the opposite side of the hill. Apparently, this shaft was excavated to a maximum of 390-400 feet in depth and separated into 3 compartments, each 8 feet by 5 feet clear, inside the timbers. A northwest trending gangway (or mining tunnel) approximately 275 feet in length extends from its base. This shaft has apparently been sealed at the surface, but remaining voids may be extensive below ground. In the coal mining operation, timber pillars were apparently used to keep the mine from caving and a shaft is described as "well timbered and a good piece of workmanship", which suggests that the mined out coal vein may still remain uncollapsed at depth. The disturbed surface area over the underground mining operations is approximately 300 feet wide. Mine openings dipping downward 16 to 25 degrees from the horizontal can be expected to extend into the hill for an unknown distance. borings performed by ENGEO encountered voids approximately four feet thick, representing mined-out areas. _. If a portion of the mine collapsed beneath an overburden less than 80 feet thick, settlement of from zero to a maximum of two feet vertical could take place at the surface. If collapse occurred beneath an overburden thicker than 80 feet, settlement at the ground surface could be considered negligible because of the bridging effects of overlying rock. Mitigation Measures (1) No residential lots shall be placed in areas with less than 100 feet of cover over suspected mined-out areas. Michael Paoli and Associates E-15 iL w Tp—is OLD COAL �✓� MINING AI EA. #44.4 ;2E.4 ENGIN1 SHAFT tsps ,PISTING SHAFT ell f - a T 22 Z� • r L__L-ANATION 1 J EXPLORATORY l3C3RING NG ..i s #fl. INCC7i PORATtM •ftd . u EXPLORATORY TES" PIT x ,,,,, 1":14C}' � PICZt?hiC'I°ER LOCATION Michael Pal ' and LOCATION OF MINING AREAS, FIGURE E-4 Associates (2) The Country Club building is proposed to be placed in the vicinity of the mined areas. Prier to construction, a detailed engineering analysis of soil and subsurface conditions shall be conducted to determine whether special foundation treatment is warranted for the structure. (3) The western slope of the coal mining area, which includes the mining entrances, shall be subexcavated to reveal the entrances. These shallbe backfilled and subdrains installed before subexcavatedd material is replaced to achieve the desired slope design. (4) Special foundation treatment may be necessary in areas adjacent to the hoisting and engine shafts. Treatment may include subexcavation, placement of a steel or concrete system to seal off the hoisting shaft at a prescribed depth, followed by placement and compaction of fill to necessary grades. Level of Significance These mitigation measures will reduce this impact to a level of insignificance. g. Impact Seismic activity could rupture natural gas andlvr petroleum pipelines Four underground pipelines traverse the project site. Three of the lines carry natural gas and one transports petroleum. The lines pass through areas proposed for residential and golf course/open space development. In the Loma Prieta earthquake of 1989, gas line damage took place in areas in which strong ground shaking or soil liquefaction occurred (McNutt, 1990), However, the danger of pipeline leakage or rupture on the project site as the result of a major earthquake in the San Francisco Bay area is considered minimal. Very intense ground shaking is associated with alluvial soils, rather than the shallow bedrock prevalent at the project site (Anderson, 1990). Also, the potential for liquefaction is low (see Impact a in Subsection 2). Mitigation Measures No mitigation measures are required. Level of Significance This impact is not considered potentially significant. Michael Paoli and Associates E-17 _.. .................................................................................................. _. 3. CUMULATIVE WEACIS AND MITIGAEON MEASURES a. Impact The population resulting from cumulative development will be exposed to potential hazards from seismic activity Full development of the Brentwood General Plan area in accordance with the cumulative development scenario would result in the construction of 13,664 additional dwelling units and a population increase of 41,757. When addedto the current (1991) City population of 8,255, a buildout population of 50,012 results, The Brentwood area could be impacted if a large earthquake should occur on one of the active faults of the San Francisco Bay area. Because Brentwood is some distance from the major active faults of the Bay Area, the intensity of groundshaking felt in the Brentwood area would be less than in the Bay Area. Some of the smaller faults that run through the planning area have not been completely snapped and characterized as to their potential activity. Mitigation Measures (1) Development in Brentwood shall take into account the possibility of earthquakes along the active faults in the San Francisca Bay area, as well as those in the Brentwood area that are potentially active. Full compliance with building cedes shall continue to be enforced. (2) Specific geological studies and structural design analysis shall be required of development proposals in areas adjacent to active or potentially active faults, areas with steep slopes, or areas with soils subject to hazards from groundshak ng and/or liquefaction. Level of Significance The potential for damage to property and loss of life which might result from a major earthquake will be mitigated to the extent feasible and to an acceptable level by the mitigation measures. Although it is not possible to predict whether the impacts of such an event can be reduced to a level of insignificance, the mitigation measures provide for a reasonable level of public safety. k i t i 8-18 Mchael Paoli and Associates ` SECTION F BIOLOGICAL RESOURCES SETTING, IMPACTS, AND MITIGATION MEASURE 1 . SETTUM a. Overview This section presents an assessment of the biological resources on the project site. Information for the assessment was assembled from on-site field observations, a survey of the pertinent literature, and consultation with personnel from responsible state and federal agencies. The field investigations were made between February and June 1990. Field activities included delineation of plant communities and wildlife habitats, recognition of important biological resources, impact assessment, survey for sensitive species, and recognition of representative biota (Appendix F=1). b. "Wildlife Habitats and Plant Communities The project site is situated on rolling hills and flatlands vegetated primarily by grassland with some oak savannah. Three intermittent streams traverse the site. However, there is no riparian vegetation, and only the deepest pools along the watercourses carry water into the spring. Several shallow depressions located near the: power line corridor collect water and form temporary, or vernal pools, during the rainy season; in some years these pools may hold water into early spring. A shallow pond near Briones 'Halley Road held water until April. In a year with normal rainfall, this pend could carry water well into surnrner. Two small cattail marshes exist along the irrigation canal and have value to wildlife. The salient features of the project site are described below under four separate subsections. (1) Northern Sector Much of the northern sector along Balfour Road is a flat grassland, intensively grazed by cattle. Deer Creek, an intermittent watercourse, runs from the west to the eastern margin of the project area. bear the western boundary, a relatively deep pool in Deer Creek collects and holds water into the spring and early summer. This poral is heavily used by cattle and offers no useable habitat for wildlife. Two minor drainage channels join Deer Creek from the north, but bath of these waterways are highly intermittent and carry water only during heavy rainfall. Near the irrigation canal, a culvert contains a shallow pool of water which in early spring contained numerous Pacific treefrog tadpoles. Michael Paoli and Associates F-i A grove of almonds is situated near the junction of Balfour Road and the irrigation canal, and a walnut orchard is located southwest of the junction of Concord Avenue and Balfour Road. The northeastern corner is planted in orchards with virtually no herbaceous understory. In the northern sector, the grassland is very closely crapped. The species that exist are those most tolerant of heavy grazing. The most abundant grasses are hare barley and fox-tail fescue; soft brume and slender oats are also common. The latter two species offer high duality forage for grazing animal's, while the two former species are not nearly as desirable. The dominant herb is redstemed storksbill, black mustard and blow wives are frequently encountered, as are field bindweed fiddleneck and common butterweed. The woody vegetation is limited to two large valley oaks in the eastern portion of the grassland. Birds are the most common wildlife, frequently seen were western meadowlark, Brewer's blackbird, and mourning dove. Starlings were abundant, especially in and around the valley oaks. Near the utility corridor, a single standing hard snag (oak) contained a barn owl nest. The only reptiles observed in this area were western fence lizards. (2) Eastern Sector A dominant feature of the eastern sector is the irrigation canal. To the east of the canal the herbaceous vegetation is protected from heavy grazing and is consequently more abundant. A rather large variety of plant species occurs; commonly seen were milk thistle, fennel, curly dock, jimsonweed, purple nightshade, blackberry, prickly pear, and virtually all the species common to the northern grasslands. House finches and house sparrows were especially common along the canal, as were red'-winged blackbirds and Brewer's blackbirds.. At least one pain of mallards nests in this area. Feral cats were frequently seen stalking birds along the canal. After dark, barn owls regularly hunted this area. Several widely separated residences are located next to Concord Avenue. The rolling hill's along the irrigation canal contain scattered blue oaks of moderate to large size. Many of the oaks harbor nesting pairs of mourning doves. In one small group of blue oaks a pair of black-shouldered kites was repeatedly seen entering a nest. These birds were frequently observed hunting the grasslands along the canaland perching in a large nearby snag'. At two locations adjacent to the canal, partially open irrigation gates have allowed water to seep into depressions and create cattail marshes. One, marsh is located' near the series of corrals, and the second, larger marsh is situated along the north central portion of the project area. In June, cattle had grazed most of the na rowleaf cattails down to water level. leo fish were observed in the shallow pools, but bullfrog tadpoles and adults are common. Creat blue herons F-2 N ichael Paoli and Associates and,great egrets occasionally hunt these small wetlands. Killdeer feed on the small freshwater clams and other invertebrates that are abundant in the canal. Near the northernmost low earth dam for flood control, there is a series of corrals and an outbuilding with numerous beefwood trees. The beefwood trees were planted years ago. These trees appear to be the favorite perching site for two pairs of American kestrels during the day and barn awls at night. Around the corrals are several walnut and Chinaberry trees, with a ground cover primarily of hare barley. The only California ground squirrel seen on tete entire project was observed here. bear the spillway of a flood control darn, four targe conduits about nine inches in diameter penetrate the concrete walls. Each of these openings is inhabited by barn awls and at least two of the conduits had barn owl chicks. Near the southern end of this sector are the ruins of an old coal mine and processing site. Around the mine, hedge nettle, bur clover, and horehound are abundant. The rock rubble from old mine structures serves as den and burrow sites for numerous Audubon's cottontails and abundant white-footed deer mice. During the night hours, barn owls and feral cats were frequently observed here. (3) Southern Sector The southern sector is bounded by Briones Valley Road and contains an intermittent drainage course that feeds into a large shallow depression. A second., low earth dam for flood control exists near the southeastern segment of the drainage course and serves to impound water. Standing water was present until approximately late April. Although wildlife make use of this standing body of water, the quality isvery tow due to trampling and accumulation of cattle excreta. Very little vegetation is present in this ephemeral pend bed, and the accumulation of salts suggest that the soil is very alkaline. In a previous study (WPM, 1988) this area was referred to.as an,alkali sink. plants common to the edge of the alkali sink included sand spurry, pineapple weed, alkali herb, annus ryegrass, and soft brume. Numerous western kingbirds were seen here. Owls nest in cliff openings near another, much smaller pool in the southwest comer. One of the oaks in the oak savannah, on the steeply sloped hill in the southwestern comer, contains a barn owl nest with three large fledglings. The steep sloping Bills that extend further north from Briones Valley load are nearly devoid of oaks and contain open grassland vegetated with the species diversity similar to that described for the northern sector. Birds commonly seen here were cliff swallows and bank swallows. A single gopher snake was also observed, as were western fence lizards. Michael Paoli and Associates p-3 (4) Western Sector The western sector is characterized by steep rolling hills dotted with oaks. Within the drip line of the oaks, monotypic stands of hare barley dominate the herbaceous cover. Elsewhere soft'brome and (oxtail fescue are more common. Over the hills tate various grasses are interspersed with blue dick, owl clover, shepard's purse, popcorn flower, and lupine. By far the most common herb is redstemedstorksbill. This species grows over large areas to the exclusion of most other plants, particularly on south- and west-facing slopes. A small intermittent drainage channel extends in an east-west direction, ultimately connecting with the alkali sink to the south. There is no riparian vegetation associated with this ephemeral watercourse. Along the north-facing slope of the northerly tall ridge in the west-central portion of the western sector, the oaks are more. closely spaced and could be described as an oak savannah. The entire western sector supports a rather high papulation of valley pocket gophers, probably because the sails are deeper and more friable than those in the eastern sector. Nearly all the trees are blue oaks; however, a few small valley oaks are present in this upland location. Bird activity was relatively high in the oak savannah. Observed were scrub jays, mocking birds, house finches, Bullock's orioles, and mourning doves. Red-tailed hawks were repeatedly observed flying overhead. Several times a great-horned owl was observed roosting in the larger oaks. Vultures were also frequently observed north of the southerly tall ridge in the western sector, especially after the appearance of three dead cattle in late March. The dead cattle appeared to be scavenged by coyotes as well as the vultures. A dead barn owl was also discovered near the dead cattle. Three burrow sites were identified north of the southerly tall ridge and were carefully monitored over the course of the study, both by observation from a distance with a spatting scope and by placement of bait and track stations. Each burrow was assigned a number (see Figure l~-1). Burrow 1, located on a relatively steep south-facing slops was first seen in early February. The margin around the opening contained' considerable freshly excavated material, and the burrow's large size suggested a coyote as a resident. By April, Burrow I appeared to be inactive, there was no longer freshly excavated material, and no tracks or scat was present. Also, spider webs were spun over the entrance and the nearby track and bait stations were undisturbed. Burrow 2 was discovered approximately 450 feet to the east along the same slope. Although it was probably dug within the fast year, it was not active during;, 'the field studies. Burrow 3 was found approximately 500 feet to the southwest of Burrow 1, across the narrow valley on the north-facing slope. Direct observation of Burrow 3 revealed the occupant to be a burrowing owl. F-d Michael Paoli,and Associates 3 } R t, E NORTH Or hard ; I i ti. \ � + ✓ IN `rte ,�, ► , N.T_2, } . , EA T A �� i ' t 0 Ti ` I Abandoned Mine AK = Alkali Sink Elderberry Plant CM = Cattail Marsh Raptor blest SP = Small Pend -- Burrow (B-l...B-8) RW = Rabbit Warren ' +�► -� Track/scent Station (T-1...T-6) VP o Vernal Pool Michael Pauli and BIOLOGICAL RESOURCES FIGURE F-1 Associates Near the utility corridor an intermittent drainage channel meanders through a small valley. Several shallow depressions hold water through the early spring and are therefore defined as vernal pools. The margins of these small bodies of water are known to support several sensitive plant species. However, heavy grazing and trampling eliminate nearly all vegetation before seed set. Plants found in the vernal pools were sweet vernalgrass, bedstraw, and Kentucky bluegrass. Further south along the utility corridor, the topography is characterized by taller, more steeply-sloped hills. The hills are vegetated in a similar fashion to those described previously. The oaks are widely spaced with very few clusters of trees. The greatest concentration of oaks in this area occurs along a north- facing slope to the west of the utility corridor, approximately midway along the western boundary. Burrows 4 and 5 were discovered near the small grave of oaks along the western boundary of the project. Scat around the entrance to Burrow 4, tracks at the track and bait station, and direct observation during nighttime spotlighting confirmed this burrow to be an active striped skunk burrow. Burrow 5 is an old, unoccupied den site that appears not to have been active for several seasons. Burrows 6 and 7 were found in the extreme southwestern comer of the project area. A striped skunk was repeatedly seen entering Burrow 6. Burrow 7, located about 150 feet directly south of Burrow 6, does not appear to have been active during this past season. Burrow 8 was found near the power pole with the raptor nest and was observed to be inactive. In addition to the burrows found within the project boundaries, at least three additional inactive burrows were seen west of the project boundary. C. Sensitive Species (1) Plants The Inventory of Rare and Endangered Vascular Plants of California (Smith, 1988) lists no taxa from within the U.S.C.S. 7.5 minute Brentwood Quadrangle. WPM (1988) mentioned the possibility of the sensitive Lilaeopsis masonii (Mudflat quill-plant) growing on the project site. However, preferred habitat for this species does not occur in the project site and consequently, its presence must be discounted. There are rare and endangered taxa which have been reported outside the Brentwood Quadrangle that could possibly occur on the project site, such as Delphinium recurvatum (Recurved larkspur) and Eschscholzia rhombipetala (Diamond-petaled California poppy). However, no rare or endangered taxa of plants were observed during on-site field studies. Although the aesthetic valley oaks are not rare or endangered, these trees are a valuable biological resource, particularly for various species of birds. Since the F-6 Michael Paoli and Associates settlement of the San Joaquin River valley, the number of oaks, particularly valley oaks, has been significantly reduced (Barbour and Major, 1977), The California Native Plant Society (Smith, 1988) includes the valley oak on List 4 (Plants of Limited Distribution - A Watch List). Plants on this list are of limited distribution. Although their vulnerability or susceptibility to threat appears low at present, they are uncommon enough that their status should be regularly monitored. Among the plants identified during on-site field studies, Grindelia camporum, a common plant, was positively identified. The specimen was = Grindelia camporum var. parviflora, which is on the California Native Plant Society's List 4. (2) Animals (a) San Joaquin Kit Fox Prior to 1972, the range for the San Joaquin kit fox (Vulpes macrosis mutica) was considered to be confined to the southern and western portions of the San Joaquin galley. However, Jensen (1972) reported the illegal trapping of three kit foxes from a ranch south of Byron. Swick (1973) reviewed data from a variety of sources and demonstrated that the kit fox ranges into the southeastern portion of Centra Costa County. Two dead kit foxes were found in 1972 near Marsh Creek Road (Swick, 1973), only 0.75 mile from the current project. Between 1978-1991, sightings of individual kit fox were made within approximately 4 miles of the project site on three occasions. in 1978 at Marsh Creek Road and Camino Diablo Road (approximately 2.5 miles southeast of the project site); in 1989 at Gill Drive and Marsh Creek Road (approximately 2.5 miles southwest of the project site); and in 1991 near Byron (approximately 4 miles southeast of the project site). No sightings were made north of the above-listed locations (U. S. Fish and Wildlife Service, 1991). According to Laughrin (1970) the San Joaquin kit fox is a weak digger who usually modifies or excavates old, existing burrows like those of ground squirrels. The burrow is usually about nine inches in diameter and circular in shape. Prey species for this animal include burrowing rodents, rabbits, and insects. Recent evidence suggests that the California ground squirrel is the most important prey species for kit foxes in San Joaquin and Contra Costa Counties. Because the ground squirrels are diurnal, the kit fox may also be seen in the northern part of its range during the daylight hours, a behavioral pattern different from populations in southern California. In an earlier study, WPM (1988) concluded that prey species on the project site were nearly non-existent. Of particular note was the reported absence of California ground squirrels. The presence or absence of this burrowing rodent Michael Paoli and Associates F-7 is considered significant not only because the San Joaquin kit fox often enlarges ground squirrel burrows for den sites, but also because ground squirrels are considered one of the most important food sources for northern populations of the kit fox. In the current study only a single California ground squirrel was seen, near the corrals. WPM (1988) also concluded that other important prey species of the kit fox such as small rodents and rabbits were completely absent from the project area. However, during the current study, valley packet gophers were numerous, especially along the western half of the study area.. Audubon's cottontails (desert cottontail) and white-footed deer mice were also numerous. The methods used to ascertain the presence or absence of the San Joaquin kit fox are those outlined by the Endangered Species Office of the U. S. Fish and Wildlife Service (1€988) and Lehman (1990). (i) Den Searches Transects established every 150 feet were searched for evidence of large burrow sites. During the field work, seven burrows or den openings were located. Each burrow was identified by number, and its location placed on the biological resource map (see Figure F-1), Burrow 1 was judged to have been an active coyote den until April, after which it was apparently abandoned. Burrow 3 was occupied by a burrowing owl until it was discovered in April to have been filled in with dirt. No additional burrowing awls were seen during the study. Burrows 4 and 6 were found to be occupied by striped skunks. Burrows 2, 5, 7, and 8 were not active during the course of the field studies. (ii) Wrack and Bait Stations Six standard track and bait stations were established which consisted of an open can of cat food anchored to the ground with a large nail. An area around the bait station was cleared, leveled, and a layer of powdered gypsum applied so that any visitor's footprints would be visible. The six track and bait stations (see Figure F-1) were positioned at strategic places throughout the study area, baited, and rechecked at least once a week for four consecutive weeks. Fresh gypsum was applied as required. In addition to the six track and bait stations, six additional stations were located near burrow sites to help evaluate the activity at the den. During the study, the contents of only two carts of cat Food were eaten, one at Bait Station 3 and one at Burrow 4. The can of cat food consumed at Bait Station 3 is located in an area frequently visited by a feral cat; however, prints in the gypsum were blurred by cattle tracks and a positive identification was not passible. The bait at Burrow 4 was consumed by a striped skunk. (iii) Spotlighting Dight searches were conducted using a 400,000-candlepower search light over the entire study area and adjacent reads. The surveys were conducted in late F•8 Michael Paoli and Associates r May for three consecutive nights, followed by two additional nights spaced a week apart in early June. During the daytime surveys, no San Joaquin kit fox were seen, nor were tracks observed. Seen during spotlighting were four different feral cats (observed almost every night), two striped skunks, one coyote, numerous Audu-bon's cottontail, and many barn owls. Along a one-mile transect near the irrigation canal, 19 Audubon's cottontails were counted. One cat and one dog were the only read kills seen during the study. (b) Valley Elderberry Long-horned Beetle The only other animal with the potential to occur in the project area which is listed as either threatened or endangered is the valley elderberry long,-horned beetle (Desmocercus californicus dimorphus). This threatened species of insect depends on the presence of elderberry plants. Field reconnaissance completed in June established that three individual elderberry plants are located on the study area, two small plants along the irrigation canal and one mature plant near the ruins of abandoned water tanks. According to Nagano (1990), the project site in Contra Costa County falls within the range of this species. Although no sign was seen of the beetle, the larval stages occur within the stems of the plants and are difficult to locate. In any case, the I.T. S. Fish and Wildlife Service assumes that elderberry plants with stems of one inch or larger harbor the insect, and the plants cannot be removed without a permit from the Service. (c) Burrowing Awls The California Department of Fish and Game has established a list of birds species of special concern in Califor . These birds include those whose "breeding populations in the state have declined so severely or are otherwise so low that extirpation is a real possibility". Birds of special concern are further listed: under three levels of priority, Highest Priority, Second Priority, and Third Priority. The burrowing owl occurs on the Second Priority list, which means that "the species are definitely on the decline in a large portion of their range in California, but their populations are still sufficiently substantial that danger is not immediate". Burrowing owls were identified occupying Burrow 3 on the project in March; however, by late April the burrows were filled in with sail, and this bird was not observed again. Michael Paoli and Associates F-9 _ _ 2. PHOJECE IMPACTS AM MITIGATION MEASURES a. Impact Removal of 21 oak trees and potential endangerment of 54 additional oak trees to be incorporated into residential tots and streets There are a total of 138 oak trees on the site, of which 21 are proposed to be removed as a direct result of development. An additional 51 trees are proposed to be incorporated into private residential lots and three are to be included in street islands. These 54 trees, although proposed for preservation, may be endangered due to a number of factors. Established oak trees are sensitive to grade changes, soil compaction, deposition of soil or spoils within the drip line, and trenching within the root zone. Both during and after construction, the trees remain sensitive to changes in soil moisture and watering regimes, particularly if installed landscaping requires summer irrigation. Most of the oak trees on the site are blue oak trees rather than valley oaks, which are listed by the California Native Plant Society as a "plant of limited distribution". No valley oaks are proposed for removal. Mitigation Measures (1) The existing oak trees on the project site shall be maintained and protected to the extent feasible. To this end, the Applicant, golf course maintenance personnel, and residents of the homes shall be informed of the particular needs and requirements of the oaks according to Living Among the Oaks: A Management Guide for Landowners (UCCE, 1988). (2) Before the start of construction, the trees selected for conservation shall be clearly identified; barriers shall be erected no less than six feet outside the drip line and remain in place throughout the construction phase. Suitable barriers could be constructed of TENSAR fencing (four feet high) or similar materials. (3) Deed restrictions, which prevent any construction within the drip lines of the oak trees, shall be recorded for all lets which are planned to contain oak trees. (4) Any oak trees removed shall be replaced, three for one, at locations approved by the City. (5) The area on top of the knoll in the southeast portion of the site (P Court and adjacent single family lots as shown on the project land use plan) shall be preserved as open space or a public park. The park could extend to the east to encompass the old mine site and intervening open space (see F-10 Michael Paoli and Associates w u mitigation measures in Section U, Cultural Resources). This measure would preserve nine additional oak trees. Level of Significance Although the above measures will help to mitigate the direct loss of oak trees and the potential loss of the trees proposed to be retained on individual lots, this impact is considered unavoidable and significant assuming the present project design, The planting of sapling oaks does not fully compensate for the loss of mature oaks and the use of the oaks as food, shelter, roots, and nest sites for a number of birds and animals. Further, it is unclear whether the long-term survival of the oaks to be retained on individual lots can be assured. b. Impact Potential loss of San Joaquin kit fox or kit fax habitat Field survey of the site, which included den searches, auk and bait stations, and spotlighting during the night, did not result in the detection of any kit fox. Due to heavy grazing and a lack of prey species (especially the ground squirrel), the site is not considered to be prime habitat for the kit fox. Based upon the summary of surveys for the San Joaquin kit fox conducted in southeastern Contra Costa County between 1978-1991, the site appears to be at the northerly edge of the species' range. Mitigation Measure No mitigation measures are required. Level of Significance Based on current land utilization, the impact to the kit fox is less than significant. C I Impact Potential loss of elderberry beetles Removal of the elderberry plants on the project site could have a negative effect on the valley elderberry long-horned beetle (Desmocercus californicus dimorphus). This threatened species of insect depends on the presence of elderberry plants. Mitigation Measures (1) The existing elderberry plants which may harbor the valley elderberry long-horned beetle shall be maintained and protected. Before the start of 1v11chael Paoli and Associates F-11 construction, the elderberry plants shall be clearly identified; barriers shall be erected no less than six feet outside the drip line and remain in place throughout the construction phase. Suitable barriers could be constructed of TENSAR fencing (four feet high) or similar materials. (2) If the project design is such that the plants will be disturbed, a permit must be secured from the C.I. S. Fish and Wildlife Service for plants with sterns of one inch or greater diameter and the plants transplanted to a natural area, perhaps near one of the proposed lakes. Level of Significance The above mitigation measures will reduce the impact to a level of insignificance. d. Impact Potential loss of burrowing owl or burrowing owl habitat Burrowing owls were observed on one occasion occupying an abandoned burrow. Breeding populations of this species of special concern were not identified on the project site during the subsequent field survey. Due to present land use and a lack of abundant prey species, this site is not considered to be prime habitat for the burrowing owl. Mitigation Measure No mitigation measures are required. Level of Significance The loss of on-site habitat is considered to be less than significant. e. Impact Loss of small wetlands areas The two small cattail marshes along the irrigation canal have been created by seepage from the canal and in the process have created small wetlands that are of value to wildlife. The aggregate size of the marshes is approximately one to two acres. Mitigation Measure Development of the golf course shall include a plan to set aside at least one of the lakes as a natural area. The perimeter of the lake could be planted with marsh F-12 Michael Paoli and Associates vegetation that would replace that lost from the cattail marshes along the irrigation canals. The margins of the lake or an island in the lake could be planted with native vegetation such as valley oaks, blaze oaks, willows, and elderberry. Planting additional elderberry would provide more potential habitat for the valley elderberry lung-horn beetle. Level of Significance The above mitigation measure will reduce the impact to a level of insignificance. 3. CUMULATIYE IMPACTS AND M111GATION MEASURES a. Impact Cumulative lass of biotic resources Development of the proposed project, together with all other projects considered under the cumulative development scenario, will result in the conversion of 9,840 acres of mostly agricultural open space to urban development. This conversion will result in a loss of existing plant communities and wildlife habitat, and the consequent loss or displacement of the wildlife dependent on the habitat. The type and quality of habitat that will be lost and the extent to which wildlife will be lost or displaced cannot be determined without a comprehensive assessment of all land planned for development. Habitat which is at least minimally suitable for sensitive species, including the San Joaquin kit fox, the valley elderberry long horned beetle, and the burrowing owl, will be lost. Moreover, there is the potential that additional oak trees will be lost to development. Mitigation Measures (1) Biotic assessments shall be performed as part of the initial studies or EIRs required for all projects proposed in areas designated for development by the Brentwood General Plan, Mitigation measures shall be required by the City as appropriate based on the findings of the assessments. The mitigation measures recommended in this EIR for the proposed project could be considered by the City for other projects. (2) A comprehensive assessment of biotic resources shall be undertaken as part of the City of Brentwood's general plan update work program, and a comprehensive mitigation program shall be addressed in the policies and implementation measures of the general plan. Level of Significance Due to the considerable extent of land that is planned for conversion to urban uses, this cumulative impact is considered unavoidable and significant. Michael.Paoli and Associates F-13 SECTION G TRAFFIC AND TRANSPORTATION SETTINGS IMPACTS, AND MITIGATION MEASURES This section summarizes the existing traffic conditions in the Brentwood area, including existing roadway facilities, traffic volumes, and operating conditions at key intersections during the A.M. and P.M. peak periods. Transit conditions are also discussed. a. Road Network The project site is located in eastern Contra Costa County on the western edge of Brentwood. Regional access is provided by State Route (SR) 4 which connects Brentwood to Pittsburg, Antioch, and other points to the west and Stockton to the east. Byron Highway provides access to Byron and Tracy in the southeast. Walnut Boulevard connects to Vasco Road to provide access to Interstate 5803 and to the City of Livermore in the south. Figure C-I shows the regional roadway network. The major roads providing access to the project site are listed below. Traffic volumes are based upon 24-hour traffic counts conducted by DDS Associates in December 1990. Average vehicle running speeds are based upon travel time studies conducted by DK,S Associates in January 1991. The major north-south roads are: State Routf, R . State Route (SR 4) extends from Hercules on the west to close to the Nevada border on the east. It is a freeway from gust west of Martinez to its junction with SR 150 in eastern Antioch. SR 4 is generally two to four lanes through the community of Oakley. In Brentwood, SR 4 is a north-south route. North of downtown Brentwood, the route passes through strip commercial and residential development. At the north edge of downtown, it follows Spruce Street, then makes a 90-degree turn onto Brentwood Boulevard (formerly Railroad Avenue) along the Southern Pacific Transportation Company (SPTCo) railroad tracks. SR 4 is a four-lane street through the downtown area, with a posted speed limit of 35 miles per hour (mph). The curve at the north end of the downtown area is pasted at 10 mph. South of the downtown area, SR 4 has a southeasterly alignment toward its junction with Byron Highway, and the speed limit is 55 mph. East of Byron Michael Paoli and Associates 0-1 c CC x 0 N w z 0 W Z a }Ul m LL M a 40 c v 0 a Y y w �u G Highway, SR 4 is oriented due east toward Stockton. Twenty-four hour traffic on SR 4 in the study area is about 16,500 vehicles per day (vpd). Heavy queueing was observed on SR 4 at its intersection with Second Street for left-turning traffic from SR 4 onto Second Street during the afternoon (P.M.) peak hour. North of the downtown area, congestion is often observed on.SR 4 during peak periods, resulting from interference with high volumes of turning traffic into and out of driveways, and heavy truck volumes. Walnut Boulevard is a two-lane, rural arterial that extends north-south west of the SPTCo tracks from Central Brentwood to the intersection of Camino Diablo Road/Vasco Road. The section of Walnut Boulevard north of McClarren Road runs parallel to the tracks. To the south, 'Vasco Road provides access to Interstate 580 near the City of Livermore. Walnut Boulevard has a four-way- stop-controlled intersection with Balfour Road that experiences significant peak hour congestion,o-1 During the evening peak, 30 vehicles were observed queued on the northbound approach to this intersection. This is attributable to the large traffic flow coming from the Livermore area (about 18 miles to the south) traveling north on Vasco Road. Similar congestion on the southbound approach can be observed in the morning peak periods. South of Balfour Road, Walnut Boulevard carries about 8,000 vpd. An average running speed of 38 mph was recorded on Walnut Boulevard. Fairyit-w AynuQ. Fairview Avenue is a two-lane, rural road that runs from Balfour Road in the south to Lone Tree Way in the north. It is designated a thoroughfare in the current Brentwood General Plan. South of Dainty Avenue, Fairview Avenue carries about 5,250 vpd. An average running speed of about 38 mph was recorded on Fairview Avenue between Balfour Road and Lone Tree Way during the P.M. peak period. Cocord ,AvQnue, Concord Avenue is a two-lane, rural read that runs from Balfour Road in the north, turns east outside the City limits, and connects with Sellers Avenue in the east. It is designated a thoroughfare in the Brentwood General Plan, Qf,- t Yalley RQad. Deer Valley Road is a two-lane, rural road that runs from Ione Tree Way in the north to Marsh Creek Road in the south. Minatuta . Minnesota Avenue is a two-lane, rural road that extends from Balfour Road in the south to its connection with Fairview Avenue, west of the Southern Pacific tracks. It is designated a minor thoroughfare in the Brentwood General Plan. O'tThis intersection was not signalized at the time the traffic counts were taken. It has since been signalized. Michael Paoli and Associates 0-3 Sind Street. Second Street is a two-lane, downtown street with stop sign controls except at the intersection with Spruce Street (SR 4). . Sellers Avenue is a. two-lane, rural road that extends from Marsh Creek Road in the south to north of Cypress Road. It is four-way-stop- controlled at Balfour Road. The major east-west roads are. Balfour fid. Balfour Road extends from Deer Valley Road in the west to Bixler Road in the east as a two-lane, rural read, which passes just south of downtown Brentwood. 'West of Fairview Avenue, it carries about 750 vpd. Nest of 'Walnut Boulevard it carries approximately 7,250 vpd. It is designated as a thoroughfare in the Brentwood general Plan. An average vehicle running speed of approximately 38 mph was recorded on Balfour Road between Sellers Avenue and Concord Avenue during the P.M. peak period. Lone.J1 y. Lone Tree Way extends from an interchange with SR 4 in Antioch, southward then eastward across the northern portion of the study area to a step-controlled intersection with SR 4, south of Oakley. It is a two-lane, rural road in the study area and carries about 6,500 vpd west of SR 4. It is being realigned and widened to four lanes in Antioch, where significant development activity is currently underway. An average running speed of about 39 mph was recorded on Lone Tree Way between SR 4 and Empire Avenue. ,Dainty Ay =. Dainty Avenue is a two-lane road with mixed land uses and a two-way-stop-controlled intersection with Brentwood Boulevard (SR 4). Dainty Avenue is on the downtown grid street system. From downtown to the west, it , crosses the railroad tracks and runs west to Fairview Avenue. It is a thoroughfare in the Brentwood general Plan with an extension planned to the proposed Delta Expressway in the future. 'west of Lincoln Avenue, it carries approximately 8,700 vpd. An average vehicle running speed of about 33 mph was recorded on Dainty Avenue between SR 4 and Fairview Avenue during the P.M. peak period. Central Boulzyudl�iyramom . Central Boulevard/Sycamore Avenue is a two-lane road with mixed land use nearby. - The intersection of Central Boulevard/Sycamore Avenue with SR 4 is signalized with actuated control. Chestnut Ayenue. Chestnut Avenue (formerly Brentwood Road) is a two-lane, rural road that extends from Brentwood Boulevard (SR 4) to Byron Highway. It is planned as a four-lane road in the Brentwood general Plan. DtU Rte. Delta Road is a two-Lane road, with intersection stop-sign controls at SR 4, that runs east of 5R 4 and serves as a local access route to Knightsen. There is currently no through traffic access to the west of SR 4. G-4 Ntichael Pace and Associates i Y Sun�et goad. Sunset Road is a two-lane road with stop-sign controls at SR 4. Sunset Road runs to the east from SR 4 to join Byron Highway. F San .C=k load. Sand geek Road is a four-lane facility with actuated signals at the intersection with SR 4. It runs to the west of SR 4 but is not currently a through route to any major roadways to the west. Southern Pacific railroad tracks run on a diagonal (northwest-southeast) through Brentwood from Neroly Road in the north to Sellers Avenue in the south. The tracks intersect the following roadways at-grade in Brentwood: Sellers Avenue, Balfour Road, Oak Street, Dainty Avenue, Lone Tree Way, and Delta Read. Currently, the tracks are relatively close to all roadway intersections and contribute to safety issues at the Balfour Road/SR 4 and Lone Tree Way/Fairview Avenue intersections. b. Traffic Operating . Conditions Levels of service analyses were conducted at 35 existing intersections in Brentwood, Antioch, and Centra Costa County (see Figure 0-2 for locations). The level of service calculations for both the signalized and unsignalized intersections are included in an appendix on file with the City of Brentwood. In order to evaluate the conditions in the study area during, the A.M. and P.M. peak periods, vehicle turning movement counts and field observations were undertaken at 26 intersections on Thursday, May 11, 1989, and in 1990 on Tuesday, June 19; Wednesday, December 5, and Tuesday, December 11. Morning peals hour counts were conducted from 7:00 A.M. to 9:00 A.M., and P.M. peak hour counts were conducted between 4:00 P.M. and 6:00 P.M. Some important traffic volumes for existing conditions are shown in Figure 0-3. Detailed A.M. and P.M. peak period turning movement traffic counts are shown in an appendix on file with the City of Brentwood. The signalized intersections were evaluated using the Critical Movements Planning Method of Circular 212 (Transportation research Beard, 1980) . The primary criteria used to describe operating conditions at signalized intersections are the volume to capacity (V/C) ratio and the average delay for vehicles. Intersection service levels, ranging from Level of Service (LOS) A (free flow) to LOS F (gridlock condition), denote the relationship between an interse'ction's peak hour volume and its capacity. The City of Brentwood considers LOS C or better at an individual intersection to be acceptable during peak traffic. The range of service levels is shown in Table G-1. The unsignalized intersections were analyzed using the methodologies of the Highway Capacity Manual (Transportation research Board, 1985). At these intersections, each turning movement that yields to an opposing movement is Nlichael Paoli and Associates G-5 S Associates E.I"St. 30 Oak)ey Aid. 29 28 � Laurel Rd, James 32 L�Sorttryry gird, Carpenter fid.• i Cie 40 .� 2� Delta Rd. . .� 31 f'rag m wy, 27 26 25 23 21 s Sunsot Rd. 24 QQ 2Sand {1 Creak Rd. 19 1$ $ camwe els 1 Aw. Unty Ava.1 5 1 8 ChesueuS St. 5 6 14 12 11 t 37 36 35 34 13 r 3 S Sallour Rd. 4 7 allS 18 8 c. Pt 233Stgnaltrets Intcrsz'ctluns4 ^ . 0 Unsignalized Intcrsectlnns S Concord Ave, > r 2 Ow� t 33 Camino Ro Figure G-2 � a. STUDY INTERSECTIONS S Associates c3awey Ra. Cypress Rd. i {471} t7'y.son � Laurei Rd. Jamra$358+^ � oowl'"' Blvd, 361 {444} `+� .�,��, Carpenter Rd. a Nita Aid, r'Jg Q 7reg (2 2t ro v w a i v 03 v I i632 to rasa } 737 ..$16}wy. (3360) ..... $62 f 259 w (558) Ln p (26S) c s `n .tom dao ua ,vnseIRd. t Sand {5G} # {40139} < < Creek Rd. 95 1 ' (82) "(240) 260} Unty Ave. Chestewt St. —341 —"� (295){5f3) 225-+- Bailout Kid. 369- € (260) j # r w ria to Iotss) t �a v ry+ (421) Legend- Sit* - -303 000 AM Peak Hour �` { (000) PM Nak Hour � —400 � ! Concord Ave. {406} i > ff t Camino Sarah ;6 Figure Figure G-3 PEAK HOUR TRAFFIC VOLUMES Existing Conditions t Table G-1 , Level of Service Definitions Signalized Intersections Kt Vehicle Volume to Level of Delay Capacity service (secs.) Ratio Description + A :s5.00 0.00-0.59 Free Flow/Insignifleant Delays: No approach phase is fully utilized by traffic and no vehicle waits longer than one red indication. a B 5.1-15.0 0.60-0.69 Mable Operation/Minimal Delays: An occasional approach phase is fully'utilized. Many drivers begin to feel somewhat restricted within platoons of vehicles. C 15.1-25.0 0.70-0.79 Stable Operation/Acceptable Delays: Major approach phases fully utilized. Most drivers feel somewhat restricted. D 25.1-°40.0 0.80.0.89 Approaching UnstabletTolerable Delays: Drivers may � have to wait through more than one red signal # Indication. Queues may develop but dissipate rapidly, without excessive delays. 6 E 40.1-60.0 0.90-0.99 Unstable Operation/Significant Delays: Volumes at or near capacity. Vehicles may wait though several signal } cycles. Long queues form upstream from intersection. F 260.0 N/A Forced Flow/Excessive Delays- Represents jammed c conditions. Intersection operates below capacity with low volumes. Queues may black upstream intersections. ' Sources lntafm Mwoiak on H4h*try C"4,Transportation Research Circtolar 212, Transportation Research Board, waahington D.C., 1980, . t i ' X k ° t x x Y evaluated separately and assigned a level of service grade. The level of service is based on the relative ability of turning traffic to find adequate gaps in conflicting traffic flaws. Table 0-2 shows the level of service definitions for unsignalized ' intersections. The all-way-step intersections listed above were analyzed using the. 1985 Highway Capacity Manual method which is based on the total volume of traffic for each approach of the intersection. The method compares the approach volumes to a limit for an LOS C condition. If the total volume is higher than the limit volume, then the intersection is considered to operate at a level of . service worse than LCIS C (< Q. If the volume is less than the limit, then the intersection is considered to have an LOS better than C (> Q. Table C-3 presents a summary of the level of service analysis for each intersection. All four of the signalized study intersections on SR 4 are currently operating at acceptable levels of service during both the A.M. and P.M. peak hours (LOS C or getter). Observations confirmed that all four signalized intersections are operating at free flow or stable conditions with minimal delays during the peak hours. Sixteen of the 28 unsignalized intersections are operating at acceptable conditions (LOS C or better) for both the A.M. and P.M. peak hours. The major traffic movement observed during the peak hours is the northbound- southbound traffic on SR 4. Because of the heavy traffic flow on SR 4 during peak periods, it is difficult for motorists to enter the main stream traffic flow on SR 4 from unsignalized minor street approaches. The minor read left-turn movements from unsignalized SR 4 study intersections experience deficient levels of service (LOS D, E, or F) for at least one of the peak hours. This results in long traffic delays for miner street traffic. Field observations confirmed delays for side street approaches to SR 4 at the following unsignalized intersections during the A.M. or P.M. peak hours: Sunset Boulevard, Lone Tree Way, Delta Read, Sellers Avenue, Dainty Avenue, and Balfour Road. It should be noted, however, that the major stream traffic flaw on SR 4 currently operates with little or no delay at each of these intersections during both the A.M. and P.M. peak hours. A similar situation is experienced at the intersections of Empire Avenue,/Lone Tree Way (minor street LOS E in both the A.M. and P.M. peak hours) and Fairview Avenue/Balfour Road (minor street LOS D in the A.M. peak hour). in both the morning and evening peak hours, traffic entering Lone Tree Way (major street) from Empire Avenue (the mincer street) experiences delays due to the heavy traffic flow along Lone Tree Way. Similarly, A.M. peak hour .motorists from Fairview Avenue (the minor street) experience delays as they enter Balfour Road (the major street). Michael Paoli and Associates G-9 Table G-2 Level of Service Criteria Unsignnalized Intersections Reserve Capacity Level of Expected Delay to (PCPH) Service Miner Street Traffic > 400 A Little or no delay 300-399 B Short traffic delays 200.299 C Average traffic delays 100-199 D Lang traffic delays 0- 99 E Very long traffic delays R F i t When demand volume exceeds the capacity of the lane,extreme delays will be encountered with queuing which may cause severe congestion affecting other traffic movements in the lntersecilon. 'Mis condition usually warrants improvement to the intersection. r p 4 Table G»3 Intersection 'V/C Ratios and LO Existing Conditions A.M. Peak Hour P.M. Weak Hour Control V/C LOS V/C LOS 1 Marsh geek Rd/Camino Diablo U AJA A/A 2 Walnut Bl/Marsh Creek Rd U-A < C < C 3 Sellers Av)SR 4 U AB A/E 4 Fairview Av/Balfour Rd U A/D AB 5 Fairview Av/Dainty Av U•A > C > C 6 Minnesota Av/Dainty Av U A/B A/B 7 Minnesota Av/Balfour U A/B AIB 8 Walnut Blvd/Balfour Rd U-A' > C < C 9 SR 4/Balfour Rd U AJC A/D 10 Sellers Av/Balfour Rd U A/A A/A 11 Sellers Av/Chestnut St U-A > C > C 12 Second St/Chestnut St U A/A A/A 13 SR 4/Chestnut St U A/C AB 14 SR 4/Oak St S 0.41 A 0.55 A 15 SR 4/Dainty Av U A/E AJE 16 Second St/Oak St U-A > C > C 1.7 Second St/Spruce St/SR 4 S 4.44 A 0.38 A 18 SR 4/Sycamore Av/Central Bl S 0.45 A 0.64 B 19 SR 4/Sand Creek Rd S 0.67 B 0.72 C 20 SR 4/Sunset Rd U AIE B/E 21 SR 4/Lone Tree Way U B/E OF 22 SR 4/Delta ltd U AIT B/E 3 O Hara Av/Lone Tree Way U AIA AB 24 Fairview Av/Minnesota Av U A/A AIA 25 Fairview AvA one Tree Way U-A' > C > C 26 Empire Av/Lone Tree Way U A/E A/E 27 Hillcrest AvA one Tree Way S 0.51 A 0.54 A 28 Hillcrest Av/Davison St S 0.27 A 0.52 A 29 Hillcrest Av/SR 4 EB Ramps U DIF B/F 30 Hillcrest Av/SR 4 WB Ramps U FB F/F 31 beer Valley Rd/Lone Tree Way U x A/C A/C 32 Lone Tree Way17. Donlon Bl S 0.46 A 0.49 A 33 Beer Valley Rd/Marsh Creek Rd U A/A AIA 35 Balfour Rd/Concord Ave U A/A AIA 39 Balfour Rd/Deer Valley Rd U A/A A/A 1 intersection was not signalized at the time traffic counts were taken. It has since been signalized. Nate; Unalgnalized lateructions do not have'VIC ratios. One-and two-way stop controlled intersections have LOS grades for each movement. I" a worst movement from the major street is shown followed by the worst movement from the minor street (e-1-,A/Z). All way stop-controlled intersections are shown as either better than LOS C(> C)or worse than LOS C (< C). �bb,�e+risrl �s: VIC volume-to-rapacity ratio S - signalized control LOS level of service A through 1~ - level at service grades U - unsignalized intersection control < C - worse than LCIS C U-A . unsignal' cd intersection with all-gray stop control > C . better than LOS C Although the intersection of Walnut Boulevard/Balfour Road operates at an LOS better than C during the A.M. peak hour, a large number of vehicles traveling northbound from Livermore on Vasco Road (which becomes Walnut Boulevard) creates deficient conditions for this intersection during the P.M. peak hour. Observations indicate that northbound traffic at Walnut/Balfour experience queueing of 30 or more vehicles during the P.M. peak periods with delays of up to five minutes. The intersection of Walnut Boulevard/Marsh Creek Road experiences heavy volumes of traffic eastbound during the A.M. peak hour and northbound during the P.M. peak hour. These heavy volumes create delays that present worse than LOS C conditions during both the A.M. and P.M. peak hours at this location. c. Signal 'Warrant Analysis Traffic signal warrants are standards which provide guidelines in the determination of whether a traffic signal is needed. A traffic signal should not be installed if no warrants are met, since the installation of traffic signals may increase delays for the majority of through traffic and increase some types of accidents. If one or more warrants are met, a signal may be appropriate. A signal warrant analysis was performed for Il study intersections where existing LOS is deficient or approaching deficient conditions for either the A.M. or P.M. peak hours. The following unsinalized intersections were evaluated: • SR 4/Balfour Read • SR 4/Sunset Road • SR 4/Lone Tree Way • SR 4/Delta Road • SR 4/Sellers Avenue • Brentwood Boulevard/Dainty Avenue • Walnut Boulevard/Marsh Creek Road { • Empire Avenue/Lone Tree Way • Walnut Boulevard/Balfour Roado-2 • Fairview Avenue/Balfour Road • Fairview Avenue/Lone Tree Wayo-z The analysis was based on the Traffic Signal Warrants from the Caltrans Trac Manual. This study only evaluated the Peak Hour Warrant (Warrant No. 11) for existing A.M. and P.M. peak hour conditions. The Weak Hour Volume Warrant is intended for application where traffic conditions are such that for at least one hour of the day, the minor street suffers long delays in entering or crossing the major street. Signal, warrants vary depending on whether the "This intersection was not signalized at the time the traffic counts were taken. It has since been signalized. f G-12 Michael Paoli and Associates Y r intersection is located in an urban or rural setting. For this report, warrant analysis was conducted using, rural conditions criteria. All 1 l of the unsignalized intersections with deficient LOS currently meet the minimum peak hour warrant requirement for either or bath of the A.M. or P.M. pear hours. A complete signal warrant study should be done prior to a decision to install a traffic signal at any location. The signal warrant analysis is provided in an appendix on file with the City of Brentwood. d. Transit Public transit service is currently provided to the study area by Tri Delta Transit, which provides a "Dimes-a-Ride" flag stop bus service in Brentwood (384, 385), and also a Dial-a-Ride bus service for the elderly and handicapped. The Dimes-a-Ride service operates from the Lucky Shopping Center at Brentwood Boulevard and Sand geek Road, south and west to the residential neighborhoods of Brentwood, and then east and north through downtown Brentwood and back to the Lucky Shopping Center. BART Express bus service operates three fixed routes (PE, PEI, P2X) from the Concord BART station, along an east-west corridor through Pittsburg, Antioch, and Oakley. All three routes continue south to Brentwood. Service is provided to BART Park-and-Ride lots at the Hillcrest exit on the north side of SR 4 in Antioch, at the Bailey Road exit on the south side of SR 4 in 'West Pittsburg, and to the Park-and-Ride lot at Sunview Place and Port Chicago Highway in Concord. There is currently no public transit service into Alameda or San Joaquin Counties from Brentwood. e. Parking The current Brentwood General Pian recommends prohibiting on-street parking "along any thoroughfare adjacent to business or commercial establishments". It also recommends that no on-street parking should be permitted within 140 feet and 50 feet of any driveway to commercial or employment areas on thoroughfares and collector streets, respectively. These measures are recommended to provide adequate sight distance for turning vehicles at intersections. Parking is not currently regulated on Balfour Road in the City of Brentwood. 2. The transportation impacts evaluation involved study of the following factors related to the Brentwood Country Club project: Michael Paoli and Associates 0-13 * Traffic impact of the project on the existing street system * Internal circulation and site access impacts * Adequacy of existing transit services * Cumulative impact of the project on .projected buildout of the City of Brentwood in terms of development and street system with and without the proposed Delta Expressway • Traffic impact of the project on the regional transportation network * Adequacy of planned transit services Key aspects of the project description that relate to the evaluation of transportation impacts include the type, quantity, and location of proposed development, the proposed, circulation system, and access to the project. Table 0-4 shows the assumed amount of development by land use category. A total of 1,622 dwelling units is proposed, including 318 apartments, 1012 townhouses, and 1,202 single family homes.o-s There would also be a 600-student elementary school, a 403-student day care facility, an 18-hole golf course, approximately 160,000 square feet of commercial space, and approximately 711,000 square feet of office space. Access to the City-wide and regional circulation system will be provided by: * Balfour Road, to be expanded to a 120-foot right-of-way providing east- west circulation. It will have two travel lanes plus a bike lane in each direction, and sidewalks on either side. * Fairview Avenue, to the east of the project, built to the same cross section as Balfour (toad. • Concord Avenue in the eastern portion of the project, which is to be relocated 600 feet to the west of its current location as part of the project. * Deer Valley Road to the west of the project. e Direct access to the project would be as follows: 10-3T*he existing plus project traffic analysts was done based:on a total of 1,138 single family homes. The current proposal calls for 1,202. This change would result in a two percent increase in traffic and would not significantly change the results. 4 0-14 Michael Paoli and Associates 9 T Table G-4 + _ Estimated Trip Generation Brentwood Country Club Trip Generation A.M. P. M. Land Use Units Peak Hr. Peak Hr. Daily Single Family Residential 1.,202 Dwelling Units 889 1,214 11,479 Apartments 318 Dwelling Units 160 187 2,018 Elementary School 600 Students 180 6 544 Townhouses 102 Dwelling Units 52 64 662 Day Care 40 Students 36 35 186 Offices 710,900 Square Peet 877 789 6,180 Commercial 160,100 Square Peet 154 549 9,484 Golf Course 18 Holes 49 60 644 TOTAL 2,397 2,904 31,197 Source: DIGS Associates;institute of Transportation Engineers,Trip Generation,Sth Edition, 1991 * One main entrance to the project on Balfour Road, located approximately one-half mile west of existing Concord Avenue. Referred to as Grand Entry or 1 Drive. One minor entrance to the project located on 'Balfour Road approximately one mile west of existing Concord Avenue and 2,400 feet west of the main entrance. Referred to as b Street. • One main entrance to the project on the realigned Concord Avenue, located 1,€00 feet south of Balfour Road. Referred to as 5 Drive. • Minor entrances to the project on new Concord Avenue located 2,200, 2950 and 4,950 feet south of Balfour Road. These are referred to as 27 Street, 29 Street, and 4 Drive. • Access for the school, day-care center, commercial areas, and offices will be provided from the new Concord Avenue. a'. Impact The project would increase traffic on the existing street system in and around Brentwood causing congestion and delay beyond the City's goal of LCIS C The impacts of the proposed project on the Brentwood street system were estimated using accepted traffic impact evaluation methods. This involves estimating the traffic generation of the project and the distribution of this traffic to potential origins and destinations. This additional traffic due to the project was then assigned to the street network and superimposed on existing traffic levels. (1) Traffic Generation Traffic generation of the proposed project was estimated based on published sources commonly used in the traffic engineering profession. To be conservative, it was assumed that all traffic generated by the project that would enter or leave the site would be by private automobile. 3 Table Gw4 shows the estimated vehicle trip generation due to the project for the A.M. and P.M. peak hours and daily. The project would generate approximately 2,397 and 2,384 vehicle trips for the A.M. and P.M. peak hours, respectively, and about 31,197 daily vehicle trips. Trip generation of the commercial portion of the project was reduced by 38 percent for the P.M. peak hour, and 28 percent for the A.M. pear hour to account for pass-by trips (Institute of Traffic Engineers, 1991). The figures in a G-16 Michael Paoli and Associates f Y Table 0-4 reflect these reductions in commercial-generated gips. This is a reasonable assumption since neighborhood retail could be heavily oriented to these "linked" trips. (2) Traffic Distribution and Assignment Distribution of project traffic was estimated with the aid of the regional traffic model (year 1988) used in the evaluation of the Delta Expressway. Peak hour traffic was manually assigned to the existing street network based on reasonable travel paths to the assumed origins and .destinations. . Figure G-4 shows the assumed A.M. and P.M. peak hour traffic distribution assumptions for residential, office, and commercial portions of the project. Appendix G-1 provides the distribution assumptions for the school and golf course portions of the project, and intersection turn movement information for each intersection. Figure 0-5 shows existing plus project assignment volumes for the A.M. and P.M. pear hours. (3) Intersection Impacts The morning and everting pear hour level of service was calculated for intersections in the study area. Table G-5 shows the level of service (LOS) results for the project under existing and existing plus project conditions. Just over half of the intersections are projected to operate at unacceptable levels of service under existing plus project conditions. The following intersections will operate at LOS C or better under existing plus project conditions: • Balfour Road/6 Street • Concord Avenue/4 Drive • Fairview Avenue/Dainty Avenue • Minnesota Avenue/Dainty Avenue • Sellers Avenue/Balfour Road • Sellers Avenue/Chestnut Street • Second Street/Chestnut Street • SR4/Oak Street • Second Street/Oak Street • Second Street/Spruce Street/SR4 SR4/Sycamore Avenue/Central Boulevard • SR4/Sand Creep Road • Fairview Avenue/Minnesota Avenue Hillcrest Avenue/Lone "'free Way (Antioch) Marsh Creek Road/Deer Valley Road (Antioch) • Hillcrest Avenue/Davison Street (County) Marsh Creek Road/Camino Diablo (County) • Lone Tree Way/James Donlon Boulevard (Antioch) Michael Paoli and Associates G-17 DKS Associates SR 4 West ' tx and Antioch ox4% L N 2i:Z itNt: E.lath St. 1671 tt;"h 204 1 2% #•+4 274 cypress, Ad. J-Z.6 "►s- S.E,Antioch $ Laurel Ad. S!4 S74 �x 374 bn&vrt, a 3 t> x H 174 % l � G Northeast #74 2 274 Carpentry Rd. {•�} 1% 1!4 1% 174 iY. 7•l. �d trn 2% 2% Deka Rd. w wy. a Sunset Rd, InternalR,r:cal >° Sand s Creek Rd, 6 674 � s 674% •& .� S rarrxrra Fl-%7t74 �. 6Avr, a.574 a.SY. d Dainty Ave. Chestnut Legend: Balfour Rd. 1a.s io.sx AM PMProject' CentraE Brentwoodcateway fah 1t3•d �' Resddential Si#e/ E 17.374 21.5% 474 fl74t7{te, 21% #t74 Commercial Coned Ave. Camp `gid$ j t Figure G-4 1575. 1 . B TRIP DISTRIBUTION PERCENTAGES x t DKK Associates x E.181h 5t. wbp bakiay Rd. crwau Ad. w $ sO Laurat 4 Rd. Jamas 386 { Clortbrt + " Bf,� 43`7` �,Q`�y� Cuaonisr Rd. � (496) J' ? 44 CD 001ta Ad. $rT ai°r u�r +tl N r` 0 to 40 1 (76wv.2) 0 ( ).- 280t� 9,3} — 675 309— a {675) .r yr (335)r= «. .. toe , 8 arSunsat Rd. (725) (842) Q ti 683 w »- 615 5 C�mora ri 522 -« ^+" 799 "14 ..»(272) Ave, ' (803) (687) NinV Avs. Cneauxrt $t. — 343 (306) Sallour Ad. Pra)act P •►-( ) 419 i1tt 497 Ava. (628) > (5 79) b' 72— w 41 (80) i (194) fZ (957) 583 w- j 659 — (717) 59-'+,.(717) ,. nv Camino rah Figure G-5 . PEAK HOUR TRAFFIC VOLUMES Existing plus Project Table G-5 Intersection V/C Ratios and LOS Existing Pius Project Conditions Existing Plus -- Existing Conditions .- »» Project.Conditions -- AM Pk Hr PM Pk Hr AM Pk Hr PM Pk Hr Control VIC LOS V/C LOS V/C LO V/C LOS 1 Marsh Creek Rdt amino Diablo U A/A A/A A/A A/A 2 Walnut Bl/Marsh Creek Rd U-A < C < C <C < C 3 Sellers Av/SR 4 U A/B A/E ATE A/F 4 Fairview Av/Balfour l=td U A/D A/B B/F E/F 5 Fairview Av/Dainty Av U-A > C > C > C > C 6 Minnesota Av/Dainty Av U A/B A/B A/C A/C 7 Minnesota; AwBalfour Rd U A/B A/B A/E B/E 8 Walnut Blvd/Balfour Rd U-A 1 > C < C < C < C 9 SR 4/Balfour Rd U A/C A/D A/E B/F 10 Sellers Av/Balfour Rd U A/A A/A A/A A/A 11 Sellers Av/Chestnut St U-A > C > C > C > C 12 Second St/Chestnut St U A/A A/A A/A A/A 13 SR 4/Chestnut St U A/C A/B A/D A/D 14 SR 4/Oak St S 0.41 A 0.55 A 0.41 A 0.55 A 15 SR 4/0ainty Av U A/E A/E A/E A/F 16 Second St/Oak St U-A > C > C > C > C 17 Second St/Spruce St/SR 4 S 0.44 A 0.38 A 0.44 A 0.38 A 18 SR 4/Sycamore AY/Central BI S 0.45 A 0.64 B 0.45 A 0,64 B 19 SR 4/Sand Creek Rd S 0.67 B 0.72 C 0.67 B 0.72 C 20 SR 4/ unset Rd U A/E B/E A/F. B/E 21 SR 4/1-one Tree Way U B/E C C/F D/F 22 SR 4/Delta Rd U AID B/E A/E B/E 23 O'Hara Av/Lone Tree 'Way U A/A A/B A/C A/D 24 Fairview Av/Minnesota Av U A/A A/A A/l3 A/C 25 Fairview Av/Lone Tree Way U-AI > C > C 0.65 B 0.72 C 26 Empire Av/Lone 'Tree Way U A/E A/E A/F B/F 27 Hillcrest Av/Lone Tree Way S 0.51 A 0.54 A 0.70 C 0.78 C 28 Hillcrest Av/Davison St. S 0.27 A 0.52 A 0.35 A 0.61 B 29 Hillcrest Av/SR 4 EB Ramps U D/F B/F D/F CIF 30 Hillcrest Av/SR 4 WB Ramps U F/F F/F FI>~ F/F 31 Deer Valley Rd/Lone Tree Way U I A/C AIC AT A/F 32 Lone 'free Way/7. Donlon BI S 0.46 A 0.49 A 0.55 A 0.55 A 33 Marsh Creek Rd/Doer Valley Rd U A/A A/A A/A A/A 35 Balfour Rd/Concord Ave U A/A A/A F/F C/F 36 Balfour Rd/Grand Entry U -- »- A/E A/F 37 Balfour Rd/6 Street U »- -» A/A A/B 38 Concord Ave/5 Drive U -- .- A/E A/E 39 Balfour Rd/Deer ''Valley Read U A/A A/A A/C A/E 42 Concord Ave/27 Street U »- -- A/E AID 43 Concord Ave/29 Street U -- »- AID A/D 44 Concord Ave/4 Drive U -- -- A/C: A/C I Intersection was not signalized at the time traffic counts were taken. It has since been signalized. r Note: Unsignaltzed intersections sic not have V/C ratios. One-and two-way strap controlled interseetlons have LOS grades for each movement, `T2ae worst movement from the major street is shown followed by the worst movement from the minor street(e.g.,AM)- All way stole-controlled Intersections are shown as either better than LOS C(> C)or worse than LOS C (< C), AhbMd;it1W e V/C . volume-to-capacity ratio U - unsignaiized Intersection control LOS + level of serviet U-A - unsignslize d intersection with ail-way stop control ! S - signalized control A through F: level of service grades < C - worse than LOS C > C . better than LOS C With the addition of project-generated traffic, the following intersections will go from LOS C or better to LOS D or worse during the peak hours: • O'Hara Avenue/Lone Tree Way • SR41Chestnut Street • Walnut Boulevard/Balfour Road • Balfour Road/Deer Valley Road • Concord Avenue/27 Street • Minnesota Avenue/Balfour Road • Balfour Road/Grand Entry • Balfour Road/Concord Avenue • Fairview Avenue/Lone Tree Way • Concord Avenue/5 Drive • Concord Avenue/29 Street • Deer 'Valley Road/Lone Tree Way (Antioch) With the addition of project generated traffic, nine additional intersections will meet the minimum peak hour warrant requirements for the installation of a traffic signal: • Second Street/Oak Street • Fairview Avenue/Dainty Avenue • O'Hara Avenue/Lone 'Tree Way • Concord Avenue/Balfour Road • Concord Avenue/5 give • Deer Valley Road/Balfour Road • Concord Avenue/27 Street • Balfour Road/Grand Entry • Beer Valley Road/Lone Tree Way (Antioch)G-4 Mitigation Measure The City of Brentwood collects mitigation fees from developers to finance roadway improvements in the City and requires participation in Capital Improvement Financing Programs. The fee is based on buildout of the Brentwood General Plan (1983), as documented in ,Brentwood Capital Improvement Costs and Basis of Development Bees, adopted July 27, 1989. Impact fees are also collected to construct two lanes of the Delta Expressway through the City of Brentwood. This project is above and beyond the level of development anticipated in the Brentwood General Plan. This means that the impacts due to the project shall be ,greater than that anticipated in the plan. However, the impact fees collected are G'4This intersection was not signalized at the time the traffic counts were taken. It has since been signalized. Michael Pauli and Associates 0-21 also additional to what was expected. The Applicant shall pay the appropriate traffic mitigation fees. Then, as phases of the project are developed, a limited traffic study shall be done to identify specific mitigation measures which would be needed to accommodate that phase of development. The Applicant would then receive a credit on the impact fee for any improvements made that are included in the impact fee program. Mitigation measures were developed for all intersections that are projected to operate at LDS E or F. Intersections operating at LCIS D were not mitigated unless they met the minimum warrants for a traffic signal. Specific improvements to mitigate the existing plus project scenario are discussed under the cumulative impacts portion of this section to follow. Level of Significance The proposed mitigation measure will reduce the impacts to a level of insignificance for all intersections within Brentwood. b. Impact The project site plan includes two aver-length cul-desacs and does not provide for emergency access to the country club The project circulation plan was evaluated relative to the interaction of site driveways with street.traffic, consistency with City standards, and adequacy of the internal circulation system. On Balfour Road, the main entrance to the project will be approximately one- half mile from the intersection of Concord Avenue. The two entrances to the project on Balfour Road will be 2,400 feet apart. The main entrance to the project on Concord Avenue will be 1,000 feet south of Balfour Road. The remaining three project entrances on Concord Avenue are located 1,200 feet, 750 feet, and 2,000 feet apart: This is adequate separation and conforms to the City's standard of 600 feet from a major thoroughfare to a major site entry. In general, internal roadways conform to City standards. However, there are two cul-de-sacs that exceed the City's standard of a maximum of 600 feet from the center of the cul-de-sac circle to the nearest intersecting street. The residential streets that exceed these standards are. • 16 Street (1,200 feet) K Court (754 feet) The driveway to the country club also exceeds this standard, at about 1,600 feet. Since the country club cul-de-sac would not trap residents in the event of fire, G-22 N iichael Paoli and Associates Y and there would be ample space to evacuate the club, it would not be necessary to shorten this access, or create a second access. The intersection of Grand Entry and S Drive will operate at LOS C during the P.M. peak hoar, which is acceptable. Mitigation Measure The residential cul-de-sacs shall be shortened to be closer to City standards. This is important to insure efficient delivery of services, such as garbage collection, and to prevent residents from being trapped by fire incidents. Level of Significance The proposed mitigation measure will reduce the impact to a level of insignificance. c. Impact The project will increase travel on regional travel routes that are at capacity or approaching capacity Much of the project-generated traffic would use regional traffic routes. Table 0-5 summarizes the estimated increase in traffic over existing levels on selected regional routes as a result of the project. The effect of this traffic increase on roadway level of service is also shown. Level of service of regional roadways was determined by using the methodologies of the Highway Capacity Manual. The level of service is based on several factors, including directional split of traffic, lane widths, heavy vehicle percentage, and grades. 4n the SR 4 freeway west of Lone Tree Way, the primary travel route to central Contra Costa County and beyond, traffic conditions are currently estimated to be at level of service F. The project would increase traffic flow at this location by 4.6 percent in the A.M. pear hour in the westbound direction, and by 5.3 percent in the P.M. pear hour in the eastbound.direction. On Byron Highway north of Marsh Creek Road, the route to Tracy and much of the Central "Valley, the project would add 9.2 percent to morning peak hour traffic and 9.9 percent to evening peak hour traffic. The level of service would drop to LOS E during the A.M. peak hour. On Marsh Creek Road, a convenient route to Clayton, Concord, and Walnut Creek, traffic volumes would be expected to increase by 40.1 percent in the Michael Paoli and Associates G-23 Table G-6 Traffic impact on Regional Routes xisting Pigs Project -- A.M. Peak Hour -- -- P.M. Peak Hour -- Existing + Existing + Existing Project % Existing Project % Lotion Vol LCIS Vol LCIS Change Vol LOS Vol LCIS Change SR 4 3,784 F 3,953 F 4.6% 4,095 F 4,310 F 5.3%r, west of Lone 'T'ree Wy, Byron Hwy 1,425 D 1,119 E 9.2% 1,150 E 1,264 E 9.9%fl north of Marsh Creek Rd Marsh Creek Rd 294 D 412 D 40.1% '352 D 504 D 43.2% west of Deer Valley Rd Vasco Rd 1,425 E 1,454 E 41.5% 1,475 E 1,647 E 49.5% south of Camino Diablo Note. 'Volumes on SR 4 are one-way peak direction. All.othei locations are two-way traffic volumes. Source: DKS Associates 4 .t r, A.M. peak hour and 43.2 percent in the P.M. peak hour. The level of service would remain at LOS D. On Vasco Road, south of Camino Diablo, the route to Livermore and the Tri- Valley area, the project would increase traffic by 41.5 percent in the A.M. peak hour and 49.5 percent in the F.M. pear hour. The level of service would remain at E. These impacts are all significant in that they cause a considerable traffic increase on roads that are already at capacity or are nearing capacity. Mitigation Measures (1) Mitigation of regional facilities is not directly under the control of the City of Brentwood, however, discussions are currently underway in East County to institute a regional traffic impact fee to mitigate the cumulative effects of development. The details of this program have not yet been agreed on. The Applicant shall be required to pay the resultant impact fees at the time building permits are obtained to participate in the mitigation of regional transportation impacts. (2) The Applicant shall assist in financing construction of park-and-ride facilities at the Delta Expressway interchange with Balfour Road. Level of Significance Because the regional routes are already at or nearing capacity and because the extent and timing of improvements to be established for the regional routes have not been determined, it is not known whether this impact can be reduced to a level of insignificance. d. Impact The project is beyond walking distance of current transit services, which would require residents and workers to walk or drive downtown for transit Existing transit services cover the downtown Brentwood area as well as the residential areas to the west of downtown along Dainty Avenue, but not as far west as the project. The existing transit routes serve as a connector to BART in Concord and AMTRAK in Mw%inez. The transit service to BART is provided throughout the clay, while the bus to AMTRAK is provided only during commute hours. The Dime-a-Ride service provides an exclusive Brentwood route between the Lucky supermarket, downtown Brentwood, and the residential areas along Dainty Avenue, NEchael Paoli and Associates C-25 Mitigation Measures (1) The Applicant shall be required to dedicate right-of-way for bus turn-guts fronting, the project site on Balfour Road and provide bus shelters. (2) The Applicant shall coordinate with area transit agencies and- the City to extend existing transit routes to the project site. (3) The Applicant shall assist in financing construction of park-and-ride facilities at the Delta Expressway interchange with Balfour Road. Level of Significance The proposed mitigation measures will reduce the impact to a level of insignificance. 3. CUM11LATIVE IMPACTS AND MITIQATION MEASURES Projections of cumulative traffic volumes indicate significant congestion on the local and regional road system. The buildout of Brentwood was evaluated using a computer model prepared for the City of Brentwood. The model is based on the one used for the recent update of the Contra Crista County General Plan and ETR. It was further refined in the Brentwood area for use in the East County Corridor - .Delta Expressway Environmental Impact Report (still in process), and has been adApted for use in Brentwood. The model represents buildout of land in Brentwood and year-2005 estimates of land use in the rest of Contra Costa County and the Bay Area as assumed in the County's General Plan. Buildout assumptions for Brentwood were provided by City of Brentwood planning Department staff. Details of the land use assumptions are provided in an appendix on file with the City of Brentwood. Roadway assumptions also generally represent buildout of the Brentwood General Plan area (see discussion below). For the remainder of Contra. Costa County and the Bay Area, assumptions used reflect those in the Contra Crista County General Plan. The model was used to forecast future link and intersection turning movement volumes in Brentwood. (1) Cumulative Scenarios Studied s The proposed Delta Expressway would have a significant impact on local travel patterns in Brentwood. The tinning, and financial plan for the project, however, is not committed. 'T'heref'ore, the cumulative analysis was done for two roadway network scenarios: 1) with the Delta Expressway; and 2) without the Delta Expressways. G-26 Michael Paoli and.Associates a A x ( ) Roadway Network Assumptions The traffic model projections include several basic assumptions, developed in consultation with City Planning and Public Works staff, regarding roadway characteristics in and around Brentwood (see Figure G-6): • Sand Creek Road extended from Fairview Avenue to Sellers Avenue t • Sellers Avenue widened to four lanes from Marsh Creek Read to Delta Read • O'Hara Avenue extended as a four-lane road from Lone Tree "Way, south to Central Boulevard Byron Highway upgraded to a two-lane arterial from SR 4 to Delta Road • Delta Road extended from SR 4 to O'Hara Avenue Walnut Boulevard widened to four lanes from teak Street to Balfour Road, and extended along railroad to Central Boulevard • Central Boulevard completed from SR 4 to dainty Avenue, as a four-lane road • SR 4 widened to four lanes from Cypress Road to Sellers Avenue • Fairview Avenue widened to four lanes from Balfour Road to Lone Tree Way, and realigned at the north end to connect directly with Empire Avenue • Dainty Avenue widened to four lanes from Fairview Avenue to Minnesota Avenue • Fairview Parkway, two lanes from Lone Tree Way to SR 4, classified as a discontinuous collector • Balfour road widened to four lanes from Delta Expressway to Sellers Avenue • Minnesota Avenue widened to four lanes from Balfour Road to Sand Creek Road Michael Paoli and Associates C-27 DKS Associates E.ttith St. WLP C}akteX Fid. .i C prase Ad. �Y�� irk •ii � # , V' •. Laurel Fid. James � 9y «•« +•• r bn Bl fir + •f+ �• CerpenW Rd. 4 f ♦ � i �'y f A ^fe f � Delta Rd. r++rrarl«■r•Y • W . tree r i - a•.......... r � r►f ia•► � f r • • • • • wCiUr7$e(At?Ido • i • • f • i ♦ • r •l � + • « r f i {] i i p • 'Y 1 +� iia■ ariar Z iiY►ilii/nd Rf M{ . i B a irlri s caiftOr!►�r r� tr+xin Ave. Cheatnui 5t. i mum s � • • • i •• s + i • • • r • i r Bellow Rd. W r a Project Legend: She, • r i •«..Y.. Ntw Roadway ••, .. Ruxd>vay WEdea#ng .•• •* Ccr,ctxd Ave. 'A a • r r Q� r r • r • a � s V •ra r••••r ���� Cxrrti�p rpt tilt + i Q Figure G-6 FUTURE ROADWAY IMPROVEMENTS M GL1 f • Griffith Lane widened to four lanes from Dainty Avenue to Balfour Road a Vasco Road realigned as a two-lane major rural arterial around proposed Los Vaqueros Reservoir • Lone Tree Way extended from SR 4 to Sellers Avenue • Sycamore Avenue extended to Sellers Avenue • Delta Expressway as a four-lane freeway from SR 160 to connect with relocated Vasco Road. harsh geek Road would serve as a two-lane connector to SR 4 (with Delta Expressway scenario only) There would be a connecter between Laurel Road and Cypress Road as in the Contra Costa County general Plant (not shown on map). The extension of Fairview Avenue from Balfour Road to SR 4 was assumed to = be built. In addition 'to future roadway improvements, a number of future transit improvements and extensions of existing transit lines are planned for the future. The traffic model used for this study was modified to include these planned transit improvements. A complete listing of these improvements is provided in Impact d, below. a. Impact Cumulative development would cause most of the study intersections in Brentwood to operate at an unacceptable LOS Figures 0-7 and 0-8 show estimated A.M. and P.M. peak hour volumes with and without the proposed Delta Expressway. Estimates of turning volumes are shown in an appendix on file with the City of Brentwood. Table G-7 presents the LOS analysis summary for future cumulative conditions in Brentwood, with and without the Delta Expressway. The LOS results indicate that 33 of the 39 study intersections in Brentwood would operate at unacceptable LOS {worse than LOS Q during either the A.M. or P.M. peak hours for the future scenario year 2005 without the Delta Expressway, With construction of the Delta Expressway, 28 of the 40 study intersections in Brentwood would still operate at an unacceptable LOS during either the A.M. or P.M. peals hours. It should be noted, however, that these scenarios assume that the road improvements anticipated in the Brentwood General :elan would not be in place by 2005. All analyses assume existing ,geometries of the sturdy intersections. The cumulative scenarios do assume construction of the new roadway links such as the Walnut Boulevard and O`Hara Michael Paoli and Associates G-29 S Assoclates E.toth St aatdey I it prtss Rd. ai 584 Loure# Ad. s t +.#« W fir Nfutm Aid. i"iM tRQ�7� ,� #�♦�8$ �# � 443 #.#•as##.i#� p '.w � * (f19i7} ►#•#•Y. • {42'1) R #.` { N tn, sw 0-Surt#at Rd. t V-=' #Sand + Vfoo • j (522` 0 •YiGs YIlY#Y1.a• �s .{ #YY#.YY#•�f 4tj 482) Sycamore ' 347 - —474 u' ,, A". t 3 (883) (995)391 t %734 ooln St0$ �,{433} +.— 543 ., {5 0) Battu r Rd. a Project Legend: lilts 2728) ffi 004 Aho Peak Hour O (000) PAI Peak Hour r —764 ••.... Ntw Roadway ° Concord Avo. (951) (60) (63) 562,o— -a—S73 (600) ,.' W A 1f j ( f I to —i-46-- .. (700) c>mino Figure C .7 2005 CUMULATIVE 7 without Delta Expressway � d y • R DKS Associates E,lath SE. Rd. Rd. ( C'press 612) �'scn • latae! Rd. 208. "x! ' (1386) .• » • err"' GsvpeMar Rd, e 04 f- 4 -ar r {1577wy. w (849) ° v c+c s �4e... a` h ti 36xw.. 9 cY to i i (� f t} (1031) • "f r.... 82 . # 5frt.a.###rs�#.0 Cd i .0 CIS to N tiY v ; �S iY r w a :Z :tt7nEt# . ai. e Sand # (721) (867) • r.".#. r 482.0- -.739-) ._739 . .i r rt .-p (835) t (953) ; (906) 349 V-0 'c to ' wr. n Chestn�ti 640 U (237) .. (668) ••.-126 "202 _1262) Salfiyw Rd. 88 SIN ` # ra s # �� Legend: (241) 000 AAi Pcak Hour �' ffi —402 (000) PNI Pu2k Hour `• .. 136 ....... ttc�v Roadway '`' con wd Ave, (496) (488) 544) 936« ... 013 64 (13 64tj (950) 521)..9 , 937•-• �� ;s`#"••.����y, 6r�r4e,_�jn`dy +.+ Camino ` ` i Maud � i Figure Q-8 2005 CUMULATIVE With Delta Expressway Table G-7 LOS Summary Cumulative Scenarios -- Without Delta _. -. With belts _. Alva Pk Hr PM Pk Hr AM Pk Hr PM Pk Hr Control V/C LOS V/C LOS V/C LOS V/C LOS 1 Marsh Creek Rd/Camino Diablo U AIF A/E A/A Atli 2 Walnut BI/Marsh Creek Rd U-A < C < C < C < C 3 Sellers Av/ R 4 U BIF C/F A/C A/D 4 Fairview Av/Balfour Rd U AE A/F A/F A/F 5 Fairview Av/Dainty Av U-A < C < C z C < C 6 Minnesota Av/Dainty Av U A/F D/F AN D/F 7 Minnesota Av/Balf©ur Rd U A/E AN A/F AIF 8 Walnut Blvd/Balfour Rd U-A < C < C < C < C 9 SR 4/Balfour Rd U A/F D/F A/F D/F 10 Sellers Av/Balfour Rd U A/B A/D A/A A/C 11 Sellers Av/Chestnut St U-A > C > C > C > C 12 Second St/Chestnut St U A/A A/B A/A A/C 13 SR 4/Chestnut St U A/E E/F A/C A!E 14 SR 4/Oak St S 1.04 F 1.29 F 0.63 B 0.81 D 15 SR 4/Dainty Av U A/A A/A A/A A/A 16 Second St/Oak St U-A > C > C > C > C 17 Second St/Spruce St/SR 4 S 0.13 A 0.17 A 0.14 A 0.13 A 18 SR 4/Sycamore Av/Central BI S 0.82 D 1.10 F 0.83 D 1.15 F 19 SR 4/Sand Creek Rd S 0.87 D 1.26 F 0.96 D 1.28 F 20 SR 4/Sunset Rd U A/F E/F A/F F/F 21 SR 4/Lone Tree Way U AIF E/F B/F F/F 22 SR 4/Delta Rd U A/F F/F A/F E/F 23 O'Hara Av/Lone Tree Way U A/F A/F A/F B/F 24 Fairview Av/Minnesota Av U D/E F/F A/B BYE 25 Fairview Av/Lone Tree Way S 0.41 A 0.87 D 0.42 A 0.73 C 26 Empire Av/Lone Tree Way S B/F D/F A/E D/F 27 Hillcrest Av/Lone Tree Way S 1.04 F 1.77 F 0.71 C 1.617 F 28 Hillcrest Av/Davison St S 1.07 F 1.54 F 0.85 D 1.62 F 29 Hillcrest Av/SR 4 EB Ramps U D/F D/F F/F F/F 30 Hillcrest Av/SR 4 WB Ramps U F/F F/F F/F F/F 31 Deer Valley Rd/Lone Tree Way U B/F F/F A/F F/F 32 Lone Tree Way/3. Donlon BI S 1.77 F 2.62 F 1.47 F 2.41 F 33 Deer Valley Rd/Marsh Creek Rd U A/F C/F A/A A/A 34 Dainty Ave/Balfour Rd U B/E F/F E/F FIF 35 Concord Ave/Balfour Rd/ Delta SB Ramps U F/F E/F E/F C/F 36 Grand Entry/Balfour Rd U B/F D/F B/E D/F 37 6 Street/Balfour Rd U A/C A/C A/A A/A 38 Concord Avenue/5 Drive U A/E A/E A/E A/E 39 Deer Valley Rd/Balfour Rd U A/F E/F A/A A/C 40 Hillcrest/Laurel Rd S 0.52 A 1.02 F 0.47 A 1.03 F 41 Delta nb Ramps/Balfour Rd S -- -- 0.62 B 0.65 B 42 Concord Ave/27 Street U A/E A/E A/E A/E 43 Concord Avenue/29 Street U AID A/D A/D A/D 44 Concord Avenue/4 Drive U A/D A/D A/D A/D 45 East Hancock Dr/Balfour Rd U A/E C/E AIE C/E 46 Center Hancock Dr/Balfour Rd U A/F B/F A/E AIE 47 West Hancock Dr/Balfour Rd U AYF B/F A/C A/E Note: Unsignalized Intersections do not have V/C ratios. Ont-and two-way stop controlled intersections have LOS grades for each movement. The worst movement from the major street is shown followed by the worst movement from the minor street(e.g.,A/E). All way stop-controlled intersections arc shown as either better than LOS C(> C)or worse than LOS C(< C). ��brev'latians: V/C - volume-Melly ratio ' S . signalized control LOS - level of tx A through F . level of service grades > '- Avenue extensions. Existing intersection geometrics were used in order to properly project exactly how much improvement each intersection will require. Mitigation Measures Mitigation measures were developed for each intersection projected to operate at unacceptable LCIS in the future. There are 40 intersections that would require improvements under either existing plus project or cumulative conditions (with or without the Delta Expressway). Improvements for each of these intersections are listed below, with the relevant condition shown, The existing plus project improvements would be required shall the project be built out over the next two years, if jlg other . . These improvements are compared to what was anticipated when the impact fee program was. initiated. The cumulative impacts would require mitigation if all study assumptions are achieved. The results of level of service analysis of the existing plus project mitigation conditions aresummarized in Table G-8 and the cumulative mitigations in Table 0-9. (1) harsh Creek Road/Camino Diablo (County) (Intersection Number l) • Cumulative w/o Delta. Expressway: P.M. peak. hour, LCIS = AfF; peak hour signal warrant met ° Mitigation; Install traffic signals ° Effect: Volume to capacity (V/C) =0.60, LCIS = B ° Comments: No signal required with Delta Expressway (2) Walnut Boulevard/Marsh Creek Road (Intersection Number 2) • Existing plus Project: P.M. peak hour, LOS worse than C; peak hour signal warrant met ° Mitigation. Signalize intersection ° Effect of litigation: V/C = 0.75, LOS = C ° Comments. Intersection meets signal warrant requirements under existing conditions • Cumulative w/o Delta Expressway, A.M. peak hour, LOS worse than C; peak hour signal warrant met C Mitigation. Install traffic signals, add 2nd westbound (WB) and eastbound (EB) thru-lanes Effect: V/C = 0.73, LOS = C Michael Paoli and Associates G-33 Table G-8 Intersection V/C Ratios and LOS Edsting Plus project Conditions with Mitigations Existing Plus Fidsting flus Project Project Conditions Conditions With Mitigations AM Peak PM Peak AM Peak PM Peak Hour Hour Hour Hour "V/C LOS V/C LOS V/C LO V/C Ltd 2 Walnut B1JMarsh Greek Rd < C < C 0.72 C 0.75 C Sellers A.v/SR 4 A/E A/F 0.36 A 0.51 A 4 Fairview Av/Balfour Rd BY E/F 0.74 C 0.68 B 5 Fairview Av/Dainty Av - > C > C 0.40 A 0.67 B 7 Minnesota Ave/Balfour Rd AJE B/E A/B B/B 8 Walnut glvd/Balfour Rd < C t C 0.58 A 0.77 C 9 SIL 4/Balfour Rd A/E B/F 0.51 A 0.66 B 1$ SR 4/Dainty Av A/E AI.F 0.30 A 0.35 A 16 Second St/Oak St >C >C 0.31 A 0.36 A 20 SR 4/ unset Rd A/E B/E 0.64 B 0.68 B 21 SR 4A4ne Tree Way CIF 17/F 0.66 B 0.76 C 22 SR 4/Delta Rd A/E B/E 0.44 A 0.62 B 23 O Hara AveA4ne Tree Way AJC A/D 0.33 A 0.39 A 26 Empire Av/Lone Tree Way A/F B/F 0,62 B 0.63 B 29 Hillcrest Avg 4 EB Ramps D/F CIF 0.66 B 0.63 B 30 Hillcrest Av/^SR 4'WB Ramps FJF P'/F 0.70 C 0.64 B 35 Concord Ave/Balfour Rd F/F OF 0.63 B 4.68 B 36 Grand Entry/Balfour Rd A/E A/F 0.45 A 0.53 A 38 Concord Ave/$ Drive A/E AM 0.51 A 0.48 A 39 Beer `Walley Rd/Balfour Ave AJC A/E 0.49 A 0.60 B 42 Concord A.veI27 St A/E A/D 0.58 A 0.50 A Note. unsignaiized intersections des not have V/C ratios, One-and two-way stop controlled intauctions have LOS grades for each movement. The worst movement from the mior street is shower followed by the worst moverntnt from the mirror street (e.g.,AB). All way stop-controlled Gntersesctlon$are shown as either better than LOS C(>'C)or worse than LOS C{< C). MMdA V/C 'volume-tet-capacity ratio LOS Inst of service U . uusignatiaed Intention control U A - u algnalized Intersection with all-way atop control S - signalized control A through f' w level of service grades * C - worse than LOS C > C N better than LOS :.Y 4 Table G-9 LOS Summary - Cumulative Scenarios Effect of Mitigations `With and Witbout Delta Fxprt ssway ._ Without Delta -- .. With Delta ._ AM Pk Hr PM Pk Hr AM Pk Hr PM Pk Hr Control V/C LOS V/C LOS V/C LOS V/C LOS 1 Marsh Creek Rd/Camino Diablo S 0.47 A 0.60 B 2 Walnut Bl/Marsh Creek Rd S 0.73 C 0.72 C 0.65 B 0.56 A 3 Sellers Av/SR 4 S 0.48 A 0.62 B _- _. 4 Fairview Av/Balfour Rd S 0.44 A 0.60 B 0.37 A 0.49 A 5 Fairview Av/Dainty Av S 0.50 A 0.76 C 0.48 A 0.77 C 6 Minnesota AvMainty Av S 0.49 A 0.74 C €3.41 A O3 71 C 7 Minnesota Av/Balfour Rd S 0.44 A 0.67 A 0.34 A 0.54 A 8 Walnut Blvd/Balfour Rd S 0.60 B 0.77 C 0.57 A 0.77 C 9 SR 4/Balfour Rd S 0.51 A 0.75 C 0.44 A 0.63 B 13 SR 4/Chestnut St S 0.30 A 0.54 A 0.50 A 0.78 C 14 SR. 4/Oak St S 0.+63 B 0.69 B 0.43 A 0.41 A 18 SR 4/Sycamore Av/Central Bl S 0.52 A 0.62 B 0,33 A 0.54 B 19 SR 4/Sand Creek Rd S 0.57 A 0.69 B 0.69 B 0.78 C 20 SR 4/ unset Rd S 0.39 A 0.72 C 0.65 B 0.74 C 21 SR 4Une Tree Way S 0.48 A 0.63 B 0.55 A 0.79 C 22 SR 4/Dolta Rd S 0.29 A 0.73 C 0.38 A 0.67 B 23 O'Hara Av/Lone Tree Way S 0.37 A 0.78 C 0.50 A 0.76 C 24 Fairview/Minnesota Av S 0.63 B 0.72 C 0.29 A 0.64 B 25 Fairview Av/Lone Tree Way S 0.23 A 0.45 A -- -- 26 Empire Av/Lone Tree Way S 0.57 A 0.79 C 0.39 A 0.65 B 27 Hillcrest Av/Lone Tree Way S 0.62 B 0.79 C 0.43 A 0.71 C 28 Hillcrest Av/Davison St S 0.84 D 1.03 F 0.61 B 1.01 F 29 Hillcrest Av/SR 4 EB Ramps S 2.23 F 3.14 F 0.95 E 1.03 F 30 Hillcrest AvISR 4 WB Ramps S 2.18 F 1.94 F 0.81 D 0.89 D 31 Beer Valley Rd/Lone Tree Way S 0.72 C 0.99 E 0.72 C 1.03 F 32 Ione Tree Way/J. Donlon Bl S 0.86 D 1.07 F 0.75 C 0.89 D 33 Deer Valley Rd/Marsh Creek Rd S 0.79 C 0.76 C -- -- 34 Dainty Ave/Balfaur Rd S O.S8 A 0.77 C 0.58 A 0.75 C 35 Concord Ave/Balfour Rd S 0.73 C 0.76 C 0.75 C 0.78 C 36 Grand Entry/Balfour Rd S 0.64 B 0.68 B 0.+65 B 0.64 B 38 Concord Ave/5 Drive S 0.56 A 0.57 A 0.56 A 0.57 A 39 Deer Valley Rd/Balfour Rd S 0.51 A 0.72 C 40 HilicresVIAurel Rd S 0.44 A 0.72 C 0.44 A 0.78 C 41 Delta nb Ramps/Balfour Rd S -- 0.52 B 0.65 B 42 Concord Ave/27 Street S 0.66 B 0.57 A 0.66 B 0.57 A 45 Fast Hancock Dr/Balfour Rd S 0.59 A 0.73 C 0.62 B 0.73 C 46 Center Hancock Dr/Balfour Rd S 0.48 A 0.65 B 0.41 A 0.56 A 47 West Hancock Dr/Balfour Rd S 0.51 A 0.61 B 0.27 A 0.47 A Note. Unsignalized Interactions do not have V/C ratios. One-and two-way stop controlled intersections have LOS grades for each moveement. The wont movement from the major street Is shown followed by the wont movement from the minor street (e.g.,A/E). All way stop-controlltd intersections am shown ac either better than LOS C(> C)or worse than LCIS C(< C). ,Ali M t o1 V/C volumo-to-capacity ratio 5 r signalized control IAS love#of saves A through 3~ - I"of service grades U - unsigualixea Intersection control < C- worse than LOS C U•A unalgnsluad Intersection with all-way stop control > C • better than LCIS • Cumulative with Delta Expressway: A.M.' peak hour, LOS worse than C'; peak hour signalwarrant met Mitigation: Same as w/o Delta Expressway Effect: V/C = 0.65, LOS = (3) Sellers Avenue/State Route 4 (Intersection Number 3) • Existing plus Project: P.M. peak hour, LOS = F; peak hour signal warrant met ° Mitigation: Signalize intersection 0 Effect: 'V/C =-0.51, LOS = A ° Comments: Intersection meets signal warrant requirements under existing conditions i Cumulative w/o Delta Expressway: P.M. peak hour, LOS = C/F; peak hour signal warrant met C Mitigation: Install traffic signals; add 2nd thru-lane on SR 4 ° Effect: 'V/C » 0.62, LOS = B Comment: No signal required with Delta Expressway (4) Fairview Avenue/Balfour Road (Intersection Number 4) • Existing plus Project: P.M. peals hour, LCIS = F; peak hour signal warrant met ° Mitigation: Signalize intersection, add EB left-turn lane, WB right-turn lane on Balfour. Separate right and left-turn lanes on Fairview. b Effect: V/C = 0.68,TOS = B C Comments: Signalization is planned by the City in the Capital Improvements Facility Plan (CIFP). Cumulative w/o Delta Expressway: P.M. peak Maur,.LOS .A/F; peak hour signal warrant met ° Mitigation: Install traffic signals, add EB left-turn lane, WB right-tum lane on Balfour. Acid southbound (SB) left-turn lane can Fairview Ave. ° Effect: V/C = 0.60, LOS = B • Cumulative with Delta Expressway. P.M. peak hour, LOS = A/F, peak hour signal warrant met 0_36 N ichael PaoU and Associates Mitigation: Install traffic signals, add 2nd thru-lane on Balfour in each direction, add VSB left-turn lane on Balfour 7 in each direction g Effect: V/C = 0.49, LCIS = A (5) Fairview Avenue/Dainty Avenge (Intersection Number 5) • Existing plus Project: P.M. peak hour, LOS better than C:; peak hour signal warrant met ° Mitigation: Signalize intersection Effect. V/C = 0.67, LOS : B ° Comments: Signalization planned by the City in CFP « Cumulative w/o Delta Expressway: P.M. peak hour, LOS worse than Q peak Dour signal warrant met Mitigation: Install traffic signals, add northbound (NB) right- turn lane, add WB left-turn lane, add 2nd EB left-turn lane ° Effect: V/C = 0.76, LCIS = C « Cumulative with Delta Expressway: P.M. peak hour, LOS worse than C; peak hour signal warrant met ° Mitigation: Signalize intersection Effect: V/C = 0.77, LOS = C (6) Minnesota/Dainty Avenue (Intersection Number 6) • Cumulative w/o Delta Expressway: P.M. pear hour, LOS : D/F; pear hour signal warrant met ° Mitigation: Signalize, add 2nd thru-lane on Dainty in both directions, add WB left, SB left, EB left ° Effect: V/C = 0.74, LOS = C ° Comments: Signalization planned by the City as part of a mitigation fee program Cumulative with Delta Expressway: P.M. peak hour, LCIS = D/F; peak hour signal warrant :net Mitigation: Same as w/o Delta Expressway ° Effect: V/C = 0.7 1, LOS = C Michael Paoli and Associates 0-37 (7) Minnesota Avenue/Balfour Road (Intersection Number 7) • Existing plus Project: P.M. peak hour, LOS = E Mitigations: Median acceleration lane on Balfour, east side of intersection ° Effect: LOS = B • Cumulative w/o Delta Expressway: P.M. peak hour,.LOS = A/lw; peak hour signal warrant met Mitigation: Signalize,acid WB right-turn lane,EB left-turn lane ° Effect: V/C = 0.67,LOS = A • Cumulative with Delta Expressway: P.M. peak hour, LOS = A/F; peals hour signal warrant met Mitigation: Signalize, add 2nd thru-lanes on Balfour, SB left-tum lane, EB left-turn lane 0 Effect: V/C = 0.54, LOS = A (8) Walnut Avenue/Balfour Read (Intersection Number 8) • Existing plus Project: P.M. peak hour, LOS worse than C; peak hour signal warrant met ° Mitigation: Signalize intersection, add NB left-tum and SB right-turn lanes on Walnut. Add EB left-turn and WB shared thru-lane on Balfour ° Effect: V/C = 0.77, LOS = C ° Comments: Temporary signals to be installed by end of 1991 by City, independent of project. • Cumulative w/o Delta Expressway: P.M. peak hour, LOS worse than C; peak hour signal warrant met Mitigation: Signalize, add 2nd thru-lanes on all approaches, 2 NB left-turn lanes, IAB right-tura lane; add one left-turn and one right-turn on all ether approaches 0 Effect: V/C = 0.77, LOS = C • Cumulative with Delta Expressway: P.M. peak hour, LOS worse than C; peals hour signal warrant met 0-38 Michael Paoli and Associates r ° Mitigation: Same as without Delta Expressway, except only one left-turn lane on NB approach and no right turn lane on NB approach Effect: V/C = 0.77, LOS = C (9) State Route 4/Balfour Road (Intersection Number 9) • Existing plus Project: P.M. peak hour, LOS = F; peak hour signal warrant met ° Mitigation: Signalize intersection ° Effect: V/C = 0.66, LOS = B ° Comments: Intersection planned to be signalized by the City in CIFP • Cumulative w/o Delta Expressway: P.M. peak hour, LCIS = D/F; peak hour signal warrant met Mitigation: Signalize, add 2nd thru-lanes on SR4, one WB right-turn lane ° Effect: V/C = 0.75, LOS v C • Cumulative with Delta Expressway: P.M. peak hour, LOS = D/F; peals hour signal warrant met ° Mitigation: Signalize, add left-turns on NB and SB approaches, one WB right-turn ° Effect: V/C = 0.63, LOS = B ° Comment: No additional thru-lane is required on SR4 in this scenario. (I0) State Route 4/Chestnut Avenue (Intersection Number 13) • Cumulative w/o Delta Expressway: P.M. pear hour, LOS = E/F; peak hour signal warrant met ° Mitigation: Signalize, add NB thru=lane, SB left-turn lane ° Effect: V/C = 0.54, LOS = A • Cumulative with Delta Expressway: P.M. peak hour, LOS = A/E; peak hour signal warrant met ° Mitigation: Signalize, no additional lanes ° Effect: V/C = 0.78, LOS = C Michael Paoli and Associates G-39 (11) State Route 4/Oak Street(Intersection lumber 14) • Cumulative w/o Delta Expressway. P.M. peak. hour, V/C = 1.29, LOS = F Mitigation. Add EB right-turn lane on Oak St. t ° Effect: V/C » 0.69, LOS = B • Cumulative with Delta Expressway: P.M. peak hour, V/C = 0.81, LOS = D ° Mitigation: Make EB thru-lane into right-turn lane Effect: V/C w 0.49, LOS = A (12) State Route 4/Dainty Avenue (Intersection Number 15) • Existing plus Project: P.M. peak hour, LCIS = F, pear hour signal warrant met Mitigation: Signalize intersection ° Effect: V/C = 0.35, LOS = A ° Comments: Intersection meets signal warrant requirements under existing conditions. However, City plans to close eastbound leg across railroad tracks, thereby eliminating the :aced for sgnalization. (13) Second Street/Oak'Street (Intersection Number 16) • Existing plus Project: P.M. peak hour, LOS better than C Mitigation: Signalize intersection ° Effect: V/C = 0.36, LOS = A Comment: Meets peak hour signal warrant requirements (14) State Route 4/Sycamore Road/Central Avenue (Intersection Number 18) • Cumulative w/o Delta .Expressway: P.M. peak hour, V/C = 1.11, LOS = F n Mitigation: Add lB thru-lane, acid. SB right-turn lane, add 2nd EB left-turn lane ° Effect: V/C » 0.62, LOS = B • Cumulative with Delta Expressway: P.M. peak. hour, V/C = 1.15, LOS = F . A G-40 lfichael Paoli and Associates i Mitigation: Change one EB thru-lane to exclusive EB left- turn lane, change SB thru-lane to exclusive SB right-turn lane ° Effect: V/C = 0.64, LOS =B (15) State Route 4/Sand Creep Road (Intersection Number 19) » Cumulative w/o Delta Expressway: P.M. peak hour, V/C = 1.26, LOS = F ° Mitigation: Add 2nd NB and SB thru-lanes, add NB right- tum lane, acid SB left-tum lane, add EB and WB left- and right-turn lanes ° Effect: V/C: = 0.69, LOS = B Cumulative with Delta Expressway: P.M. peals hour, V/C = 1.28, LOS = F Mitigation: Add 2nd NB and SB thru-lanes, add left-turn lanes on EB, WB and SB approaches, add NB right-turn lane ° Effect: V/C = 0.78, LOS = C (16) State Route 4/Sunset Road (Intersection Number 20) » Existing plus Project: P.M. peak hour, LOS = E; peak hour signal warrant met ° Mitigation: Signalize intersection ° Effect: V/C = 0.68, LOS = B Comments: Intersection meets signal warrant requirements under existing conditions. » Cumulative w/o Delta Expressway. P.M. peak hour, LCIS = E/F; peak hour signal warrant met Mitigation. Signalize, add 2nd NB and SB thru-lames, remove NB right-tum lane, add SB left-turn lane ° Effect: V/C =0.72, LOS = C Cumulative with .Delta Expressway: P.M. peak hour, LOS = F'/F; peak hour ,signal warrant met Mitigation: Signalize, add 2nd NB thru-lame, remove NB riht»turn lane Effect: V/C = 0.74, LCIS = C Michael Paoli and Associates G-41 (17) State Route 4/Lone Tree `'VVay (Intersection Number 21) Existing plus project: P.M. peak hour, LOS = F; ;peak hour signal warrant met ° Mitigation: Signalize intersection C Effect; V/C = 0.76, LOS = C Comments: Intersection meets signall warrant requirements under existing conditions. Intersection is planned to be signalized by the !City in CIFP. Cumulative w/o Delta Expressway: P.M. peak hoar, LESS = E/F; peak hour signal warrant met ` Mitigation: Signalize, add 2nd NB and SB thru-lanes, add SB right-turn lane 0 Effect: V/C = 0.53, LOS = B • Cumulative with Delta Expressway: P.M. peak hour, LOS = F/F; peak hour signal warrant.met ° Mitigation: Same as w/o Delta Expressway C Effect: V/C = 0.79, LOS = C (18) State Route 4/Delta Road (Intersection Number 22) • Existing plus Project: P.M. peak hour, LOS = E; peak hour signal warrant met ° Mitigation. Signalize intersection Effect: V/C w 0.62, LOSS= B C Comments: Int rs on meets signal warrant requirements under existing conditions. Cumulative w/o Delta Expressway: P.M. peak hour, LCIS w F/F; peak hour signal warrant met Mitigation: Signalize, acid 2nd NB and SB thru-lanes, add NB right-turn lanes, add AVB left-turn lane ° Effect: V/C = 0.73, LOS = C Cumulative with Delta: Expressway P.M. peak hour, LOS = E/F; peak hour signal warrant met 0 Mitigation: Same as w/o Delta Expressway Effect: V/C = 0.67, LOS = B G-42 Michael Paoli and Associates x (19) O Nara Avenue/Lone Tree "Way (Intersection Number 23) Existing Plus Project: P.M. peak hour, LDS = A/D; peak hour signal warrant met t Mitigation: Signalize intersection ° Effect: V/C = 0.39, LOS = A ° Comments: Intersection is planned to be signalized by the City in CIFP. • Cumulative w/o Delta Expressway: P.M. peak hour, LOS = A/F; peak hour signal warrant met 0 Mitigation: Signalize, add 2nd thru-lanes on all approaches, acid 2 left-tarn lanes on NB approach, add left-turn lanes on WB and SB approaches, add SB and EB right-turns 0 Effect. V/C = 0.78, LOS = C • Cumulative with Delta Expressway: P.M. peak hour, LOS = B/F; peak hour signal warrant met ° Mitigation. Signalize, add 2nd thru-lanes on EB and WB approaches only, add left-lanes on NB, WB and SB approaches. O Effect: V/C = 0.76, LOS = C (20) Fairview Avenue/Minnesota (Intersection Number 24) • Cumulative w/o Delta Expressway. P.M. peak hour, LCIS = F/F; peak hour signal warrant met ° Mitigation: Signalize, acid 2nd thru-Fane on Fairview, add left-team lane on SB approach ° Effect: V/C = 0,72, LOS == C Cumulative with Delta Expressway: P.M. peak hour, LOS = B/E,-,,. peak hour signal warrant met ° Mitigation: Signalize, no additional lanes ° Effect. V/C -- 0.64. LOS = B ° Comment: The Fairview extension to Empire road will divert traffic via this intersection. Michael Paoli and Associates 0-43 (21) Fairview Avenue/Lone Tree Way (Intersection Number 25) Cumulative w/o Delta Expressway: P.M. peak hour, V/C - 0.87, LCIS = D Mitigation: Add 2nd thru-lane on Lone Tree Way ° Effect: V/C = 0.45, LCIS = A ° Comment: The Fairview extension to Empire Road diverts traffic away from this intersection. No mitigation required- with ewiredwith Delta Expressway. (22) Empire Avenue/Lone Tree 'W'ay (Intersection Number 25) 3 • Existing plus Project: P.M. peals hour, LOS = F; peak hour signal , warrant met ° Mitigation: Signalize intersection Effect: V/C = 0.63; LCIS = E Comments: Intersection meets signal warrant requirements under existing conditions. , • Cumulative w/o Delta Expressway. P.M. peals hour, LOS = D/F; peak hour signal warrant met ° Mitigation: Signalize, add thru-lane on Lone Tree, add NB, SB and WB left-turn lanes, add EB right-tum lane ° Effect: V/C = 0.79, LOS = C • Cumulative with Delta Expressway: P.M. peak hour, LOS = D/p; � peak hour signal warrant met Mitigation, Signalize, add 2nd thru•lane on Lone Tree, acid WB and NB left-turn lanes, add EB right turn lane ; ° Effect: V/C = 0.65, LOS B 4 (23) Deer Valley Road/Marsh Crook Road (County) (Intersection Number 33) • Cumulative w/o Delta Expressway: A.M. peak hour, LOS = F; { peak hour signal warrant met Mitigation: Signalize, provide exclusive left-turn lane and # exclusive right-turn lane on southbound approach Effect: V/C = 0.79, LOS Comment: No mitigation required with Delta Expressway 0-44 Michael Paoli and Associates Y (24) Dainty Avenue/Balfour Road (Intersection Number 34) Cumulative w/o Delta Expressway. P.M. peak hour, LOS = F; peak hour signal warrant met ° Mitigation: signalize, add eastbound left-turn lane Effect: V/C = 0.77, LOS = C Comments: Balfour Road assumed to be 2 lanes in each direction. Cumulative with Delta Expressway: P.M. peak hour, LOS = F; peak hour signal warrant met Mitigation: Same as without Delta Expressway ° Effect: V/C = 0.75, LOS = C (25) Concord Avenue/Balfour Road/Delta Expressway Southbound Off-Ramp (Intersection Number 35) Existing, plus Project: P.M. peak hour, LOS = F; peak hour signal warrant met ° Mitigation: Convert NB shared lane to Left-tum lane, add two NB right-turn lanes. Add WB left turn lane, EB right- turn lane ° Effect: V/C = 0.68, LOS = B ° Comment: Delta Expressway ramp not included under this scenario. Cumulative w/o Delta Expressway: P.M. peak hour, LOS = F; peals hour signal warrant met ° Mitigation: Signalize, add EB thru-lame and EB right-turn lane, WB left-turn lane, exclusive NB left- and right-turn lanes ° Effect: V/C = 0.76, LOS = C Comment: Delta Expressway ramp not included under this scenario. • Cumulative with Delta Expressway: P.M. peak. hour, LOS = F; peak hour signal warrant met Mitigation: Same as without Deltas Expressway, plus add a NB right-turn lane. Off-ramp should have 2 left-turn lanes, one tru-lane, and I right-turn lane. ° Effect: V/C = 0.78, LLS = C Nlichael Pauli and Associates G-45 .n..w.k1 (26) Grand Entry Drive/Balfour load (Intersection Number 36) • Existing plus Project: P.M. peak hour, LOS = F; peak hour signal warrant met ° Mitigation: Si (28) Deer Valley Road/Balfour Avenue (Intersection Number 39) • Existing plus Project: P.M. peak hour, LOS : E, peak hour signal warrant met ° Mitigation: Signalize intersection. Effect: V/C = 0.60, LOS = B • Cumulative w/o Delta Expressway: P.M. peak hour, LOS E/F; peak hour signal warrant met ° Mitigation: Signalize, add separate left-turn lanes on WB and SB approaches, add separate right-turn lanes on WB and NB approaches Effect: V/C = 0.72, LOS = B • Cumulative with Delta Expressway. P.M. peak hour, LOS = A/C Mitigation: No signal, add separate lanes on all approaches as for w/o Delta Expressway Effect: LOS = A/A (29) Concord Ave/27 Street (Intersection Number 42) • Existing plus Project: A.M. peak hour, LOS = E; peak hour signal warrant met ° Mitigation: Signalize intersection Effect: V/C = 03.58, LOS = A • Cumulative with and without Delta Expressway; A.M. peak hour, LOS = E ° Mitigation: Signalize intersection ° Effect: V/C = 0.66, LOS = B (30) East Hancock Drive/Balfour Road (Intersection Number 45) • Cumulative with and without Delta Expressway: P.M. peak hour, LOS = E, peak hour signal warrant met Mitigation: Signalize intersection ° Effect: V/C = 0.73, LOS = C Mzchael Paoli and Associates G-47 (31) Center Hancock Drive/Balfour Road (Intersection Number 46) • Cumulative without Delta Expressway: P.M. peak hour, LOS - F; peak hour signal warrant met ° Mitigation: Signalize intersection ° Effect: V/C = {1.65, LOS = B • Cumulative with Delta Expressway: P.M. peak-hour, LOS = E; peals hour signal warrant met ° Mitigation: Signalize intersection ° Effect: V/C = x}.56, LOS = A (32) gest Hancock Drive/Balfour Road (Intersection Number 47) • Cumulative without Delta Expressway: P.M. peak hour, LCIS = F; peak hour signal warrant met ° Mitigation: Signalize intersection ° Effect: V/C = 0.6 1, LOS = B Cumulative with Lena Expressway: P.M. peak hour, LCIS = E; peak hour signal warrant suet ° Mitigation: Signalize intersection o Effect: V/C = 0,47, LOS = A In reality, the project will be phased in over many years. At the same time, other developments will proceed in the City. Therefore, it is impossible to know precisely which improvement projects will:be needed when.the fiat phase of the project is occupied. The actual mitigation of this project will be a subset of the existing plus project mitigation measures and the cumulative impact mitigation measures. Considering these factors it is recommended that a limited traffic study be prepared at the time each phase of the project is to be approved.. This study will, identify specific traffic mitigation measures needed to accommodate the development of that phase. The Applicant would theta be responsible to undertake the identifiers mitigation measures from that limited study. If the specific measures are ones that were anticipated in the creation of the traffic mitigation fee, then the Applicant would receive a credit on the fee payment. I the projects were sant anticipated as part of the fees, the Applicant would be responsible for some or all of the additional improvement costs. This approach to mitigation is consistent with current City of Brentwood procedures. G-48 Michael Paoli and Associates These proposed mitigations and roadway improvements do not go above and beyond the proposed improvements included in the Capital Improvements Facility Plan for the City of Brentwood. Proposed additional thru-lanes at study intersections are consistent with recommendations in the Capital Improvement Financing program. However, the proposed mitigation measures for the cumulative conditions assume implementation of the roadway improvements listed previously under Section 3. These improvements are not all included in the Capital Improvements Financing Program. With the proposed mitigations, all study intersections within Brentwood will operate at acceptable LOS with and without the Delta Expressway. Level of Significance The proposed mitigation measures will reduce the impact to a level of insignificance. b. Impact Cumulative development would impact regional roadways Future traffic volume increases due to the project on SR 4 freeway in Antioch, Byron Highway, Vasco Road, and Marsh Creek road were evaluated. Table 0-14 shows the project traffic levels on these regional roadways, and the traffic volume increase (expressed as a percent) on these roadways attributed to the proposed project. It should be noted that these estimates are sensitive to the amount of employment located in Brentwood. The analysis assumes considerable growth in employment in Brentwood at buildout. Should this employment growth not occur, or be delayed, impacts on regional facilities could be greater than shown due to more out-commuting to other areas. The project will increase future traffic volumes on regional roadways by 10 percent or less during the P.M. peak hour. On SR 4 west of Lane Tree Way in Antioch, an increase of 74 vehicles during the P.M. pear hour will be attributed to the project with the Delta Expressway built, a 2 percent increase over future traffic volumes. This section of SR 4 will operate at LOS F with or without the proposed project. A 42-vehicle increase on SR 4 east of Byron Highway is expected due to the project with the Delta Expressway (2 percent). This segment of SR 4 is expected to operate at LOS F with or without the project. Byron Highway and Vasco Read south of Camino Diablo Road will both operate at LOSE in the future with or without the project if the Delta Expressway is built. Traffic increases will range from 14 to 37 vehicles on these roadways as a result of theproject, This represents a 1 to 3 percent increase in volume. On Marsh Creek Road west of Deer Valley Road, a 73-vehicle increase is expected as a result of the project. This section of Marsh Michael Paoli and Associates G-49 Table G-10 Regional Highway Traff le Level Comparison With and Without Delta. cpressway - PM Peak Hour Without With o• Delta Expressway -. q. Delta Expressway -.. Direction Total Project 'Total Project Location (bound) Trac LOS Gen. % Traffic LCIS Gen. % SR 4 West,of. East 4,187 F +37 +1% 4,363 F +74 +2% Lane Tree Way SR 4 East of :mast 2,842 F +35 +2% 1,825 F +42 +2% Byron Highway Byron Highway So. North 1,235 F +25 +2% 1,030 E +14 +1% of Camino Diablo Rd Vasco Road So. Borth 1,430 E +45 +3% 1,264 E +37 +3% of Camino Diablo ltd Marsh Crk Rd Nest Fast 1,066 1~ +82 +8% 721 E +73 +10% of Deer Valley ltd NoW Peak dtrectioa traffic VOlumer z ' i ' 4 i :• t Creek Road will operate at LOS F without the Delta Expressway and LOS E if the Expressway is built. Mitigation Measures (1) Mitigation of regional facilities is not directly under the control of the City of Brentwood, however, discussions are currently underway in East County to institute a regional traffic impact fee to mitigate the cumulative effects of development. The details of this program have not yet been agreed on. New development projects shall be required to pay the resultant impact fees at the time building permits are obtained to participate in the mitigation of regional transportation impacts. (2) New development projects shall assist in financing park-and-ride facilities. Level of Significance Because the regional routes are already at or nearing capacity and because the extent and timing of improvements to be established for the regional routes have not been determined, it is not known whether this impact can be reduced to a level of insignificance. C. Impact Cumulative development would impact intersections in the City of Antioch There are seven intersections in the City of Antioch which would be impacted by traffic generated from the buildout of the cumulative development scenario. Mitigation Measures The following mitigation measures are recommended for intersections in Antioch. Implementation of these improvements would require the coordination and approval of the City of Antioch. However, approval by the City of Antioch is not necessarily forthcoming, and there is no guarantee of a desire for these improvements by the City of Antioch. There is currently no mechanism for Brentwood projects to contribute to improvements in Antioch. The Action Plan for Routes of Regional Significance currently being developed for the Measure C growth management policy may address this issue. (1) Hillcrest Avenue/Lone Tree Way (Antioch) (Intersection Number 27) • Cumulative w/o Delta Expressway: P.M. peak hour, VV/C = 1.77, LOS =F Michael Paoli and Associates 0-51 Add third thru-lane on Lone Tree, add right-turn lanes on all approaches, add 2nd left-turn lane on EB approach Effect: V/C = 4.79, LOS .. C �f • Cumulative with Delta Expressway. P.M. peak hour, V/C = 1.61, LOS = F ° Mitigation: Sarre as without Delta Expressway, except no . right-turn lane on NB approach Effect-. V/C =€x.71, LOS = C (2) Hillcrest Avenue/Davison (Antioch) (Intersection Number 28) .. f • Cumulative w/o Delta Expressway: P.M. peak hour, V/C = 1.77, , LOS =F ° Mitigation: Add third thru-lane on NB, EB and SB r approaches, add second left-turn lane on NB approach, add right-turn lane on NB approach r Effect: V/C = 1.03. LOS = F € Comment: This intersection is difficult to mitigate further • Cumulative with Delta Expressway: P.M. pear hour, V/C :: 1.61, LCIS =F Mitigation: Same as w/o Delta Expressway Effect: V/C : 1.01, LOS = F (3) Hillcrest Avenue/State Route 4 Eastbound Ramps (Antioch) (Intersection Number 29) Existing plus Project* P.M, pear hour, LCIS = F; peak hour signal ! warrant met Mitigation: Signalize intersection, convert northbound exclusive right-turn lane-to shared through/right-turn lane. Add second eastbound night-turn lane.- Effect: V/C = 0.63, LOS = B � • Cumulative with and without Mita Expressway: P.M. pear hour, LOS F, peals hour signal warrant met ° Mitigation: Signalize, new interchange Comment: Requires new interchange design to improve g level of service. ` G-52 Michael Pauli and Associates e (4) Hillcrest Avenue/State Route 4 Westbound Ramps (Antioch) (Intersection Dumber 30) y Existing plus Project: A.M. pear hour, LOS = F; peak hour signal warrant met h Mitigation: Signalize intersection, add two NB left-turn lanes, SB right lane ° Effect: V/C = 0.70, LOS = C • Cumulative with and without Delta Expressway: A.M. peak hour, LOS =F; peak hour signal warrant met O Comment: Requires same mitigation as eastbound ramps intersections (5) Deer 'Walley Road/Lone, Tree Way (Antioch) (Intersection Number 31) • existing plus Project: P.M. peak hour, LOS = F; peak hour signal warrant met ° Mitigation: Signalize intersection ° Effect: V/C = 0.71, LOS = C ° Comments: Intersection has been signalized recently • Cumulative w/o Delta Expressway: P.M. peak hour, V/C = 2.64, LOS = F Mitigation: Requires third thru-lane with two left-turn lanes and one right-turn lane on all approaches ° Effect: V/C = 0.99, LOS = E ° Comments: This intersection cannot reasonably be mitigated to LOS C. • Cumulative with Delta Expressway: P.M. peak hour, V/C = 2.49, LOS = F ° Mitigation: Requires third thru-lane with two left-tum lanes and one right-turn lane on all approaches ° Effect: V/C = 1.03, LOS = F ° Comment: This intersection cannot reasonably be mitigated to LOS C Michael Paoli and Associates G-53 (6) Lone Tree Way/,lames Donlon Boulevard (Antioch) (Intersection Number 32) • Cumulative w/o Delta Expressway: P.M. pear hour, V/C = 2.62, LOS = F Mitigation: Add third thru-lane on NB and SB approaches, add two left-turn lanes on NB and EB approaches, add.right turn lane on NB and EB approach, add right-turn lane on NB and EB approaches ° Effect: V/C = 1..07, LOS = F ° Comment: Cannot be mitigated to LOS C « Cumulative with Delta Expressway: P.M. pear hour, V/C = 2.41, LOS = F ° Mitigation: Add third thru-lane on NB and SB approaches, add two left-tum lanes on NB and EB approaches, add right- turn lane on NB and EB approach, add right-turn lane on NB and Eli approaches Effect: V/C = 0.89, LOS = D Comment: Cannot be mitigated to LOS C (7) Hillcrest Avenue/Laurel Avenue (.Antioch) (Intersection Number 40) • Cumulative w/o Delta Expressway: P.M. peak hour, V/C = 1.02, LOS = F Mitigation: Add third thru-lane on Hillcrest in each direction, add second left-turn lane on WB approach ° Effect: V/C = 0.72, LOS{= C • Cumulative with Delta Expressway: P.M. peak hour, V/C = 1.03, LOS =F ° Mitigation: Add second left-turn lane on WB approach ° Effect: V/C = 0.78, LOS = C Level of Significance The proposed mitigation measures will reduce the impact of the cumulative development scenario but would not climinate the significant traffic congestion conditions which will occur with or without the construction of the project. G-54 Michael Paoli and Associates d. Impact Future transit planning would not provide adequate transit service to the project area Public transit is currently provided to the study area by Tri Delta Transit and BART Express bus service as discussed previously in this section. Tri Delta Transit provides a "Dimes-a-Ride" flag stop bus service in Brentwood (384, 385) and a Dial-a-Ride bus service for the elderly and physically disabled. BART Express bus service operates three fixed routes (PE, PEI, P2K) through Brentwood to the Concord BART station. r By the year 2005, several transit improvements in the area were assumed. Future year 2005 transit improvement assumptions for the Bay Area were developed by the Metropolitan Transportation Commission for the Regional Transportation Plan. Included in the plan were future definitions for the transit carriers in the Brentwood ,area. The following is a list of expected transit improvements that would benefit the Brentwood area by 2010: ,BAT, Current BART lines would be extended to provide connections from West Pittsburg to the San Francisco Airport. BART would also be extended to provide a connection between East Livermore and Richmond. BART Er!:ss. routes PE and PEI would be combined into one route, running every 15 minutes between Brentwood and West Pittsburg on a daily basis. This route would stop only at park-and-ride lots in Pittsburg and Antioch, as well as local stops in Brentwood and Oakley. A new route would be provided from Antioch to the Martinez AMTRAK depot. A new route would be added from "West Pittsburg BART to Lawrence Livermore Labs via SR 4 and the new Vasco Road or the Delta Expressway. This route would operate hourly in both directions on a daily basis. It would make stops at park- and-ride lots on SR 4 and local stops in Brentwood and Byron. This route would provide limited regional service to the project site. These future transit improvements, however, will still not provide adequate transit service to the project site. Mitigation Measures Same as Section 2, Impact d. Level of Significance The proposed mitigation measures will reduce the impact to a level of insignificance. Michael Paoli and.Associates G-55 r SECTION H AIR QUALITY SETTING, IMPACTS, AND MITIGATION MEASURES a. Air Quality Standards The Federal Clean Air Act of 1970 and California's Mulford-Carrell Act of 1967 established air quality standards for several pollutants. The federal standards have two tiers: primary standards, designed to protect the public health, and secondary standards, intended to protect the public welfare from effects such as visibility reduction, soiling, nuisance, and other forms of damage. The state and federal ambient air quality standards are shown in Table Hw1. b. Pollutant Characteristics (1) Air Basin The project is within the Bay Area Air Basin. Within this air basin, the state and federal air quality standards for nitrogen dioxide, sulfur dioxide, and lead are met. Standards for other pollutants such as ozone, carbon monoxide, and suspended particulate matter (Plvlto) are not met in at least a portion of the air basin. A discussion of the characteristics, major sources, and health effects of these pollutants follows. (2) Ozone Ozone is the most prevalent of a class of photochemical oxidants formed in the urban atmosphere. The creation of ozone is a result of complex chemical reactions between hydrocarbons and oxides of nitrogen in the presence of sunshine. Unlike other pollutants, ozone is not released directly into the atmosphere from any sources. The major sources of oxides of nitrogen and reactive hydrocarbons, known as ozone precursors, are combustion sources such as factories and automobiles, and evaporation of solvents and fuels. The health effects of ozone are eye irritation and damage to lung tissues. ozone also damages some materials such as rubber, and may damage plants and crops. (3) Carbon Monoxide Carbon monoxide is an odorless, colorless gas that is highly toxic. It is formed by the incomplete combustion of fuels, and its main source in the Bay Area is automobiles. Carbon monoxide's health effects are related to its affinity for Michael Paoli and Associates H-1 TABLE H-1 FEDERAL AND STATE AMBIENT AYR (QUALITY STANDARDS w Federal Primary Pollutant Avera in 'Time Standard State Standard Ozone I-Hour 0.12 PPM 0.09 PPM Carbon Monoxide &Hour_ 9.00 PPM 9.00 PPM I-Hour 35.00 PPM 20.00 PPM Nitrogen Dioxide Annual 01.05 PPM •_ I-Hour -� 0.25 PPM Sulfur Dioxide Annual 0.03 PPM -- 24.Hour 0.14 PPM 0.05 PPM I-Hour -- 0.25 PPM PM10 Annual Avera a 50 Ug/M3 30 Ug/M3 24-Hour 150 u_/m3 50 u fm3 u } Source: California Air Resources Board, California Air Quality Data Annual r Summary, Vol. XX: 1988. H'2 Mchael Paoli and Associates ^E hemoglobin in the blood. At high concentrations, carbon monoxide reduces the amount of oxygen in the blood, causing heart difficulties in people with chronic diseases, reduced lung capacity, and impaired mental abilities. (4) Suspended Particulates (PMIO) Suspended particulate matter consists of solid and liquid particles of dust, shot, aerosols, and ether matter which are small enough to remain suspended in the air for a long period of time. Some of the suspended particulate matter in the air is due to natural sources such as wind-blown dust and pollen. Man-made sources include combustion, automobiles, field burning, factories, and unpaved roads. A portion of the particulate matter in urban atmospheres is the result of photochemical processes. The effects of high concentrations on humans include aggravation of chronic disease and heart/lung disease symptoms. Non-health effects include reduced visibility and soiling of surfaces. c. Sensitive Receptors The Bay Area Air Quality Management District (BAAQMD) defines sensitive receptors as those facilities most likely to be used by the elderly, children, the infirm, or persons with particular sensitivity to air pollutants. Examples are hospitals, schools, and convalescent homes. The school and day care center planned for the project site will be classified as sensitive receptors, as will the school planned for a site north of Balfour Road. d. Current Air Quality The project site is on the eastern edge of the nine-county Bay Area Air Basin. The BAAQNID operates a network of air quality monitoring stations throughout the air basin. No monitoring stations are located near the project site. The closest air monitoring stations are located in Pittsburg, about 1l miles northwest of the site, and on Bethel Island, about 10 miles northeast of the project site. A summary of air quality data from these monitoring stations is shown in Table H-2. Data are shown for the years 1988-1990. Table H-2 shows that the federal ambient air quality standards for most criteria pollutants are /net at the monitoring stations near the project site. Concentrations of ozone and PM IO measured at these stations do, however, exceed the more stringent state standards. e. Regional Air Quality Planning The San Francisco Bay Area has been designated as a region where three national ambient air quality standards are being exceeded. Under the 1977 Clean Air Act, the Association of Bay Area Governments (ABAG) was empowered to Michael Paoli and Associates 1-1-3 TABLE H-2 AIR QUALITY DATA FOR PITTSBURG ANIS BETHEL ISLAND 1988-1990 Pollutant Standard Year Da s Exceedin Standards at PittsburgBethel Island Ozone Federal 1-Hour 1988 0 0 1989 0 0 1990 0 0 Ozone State 1-Hour 1988 9 7 1989 5 11 1990 4 5 CarbonMonoxide. Federal $-Hour 1988 0 0 _ 1989 0 0 1990 0 0 Nitrogen Dioxide State 1-Hour 1988 0 0 1989 0 0 1990 0 0 Sulfur Dioxide Federal 24-Hour 19880 0 1989 _ 0 0 1990 1 0 0 PM10 State 24-Hour 1988 10 _ 1989 - 7 4 1990 P 7 Source. California Air Resources Board, California Air Quality Data Annual Summary, Vols. XX-XXII: 1958-1990. q r H-4 Michael Paoli and Associates prepare a non-attainment plan for ozone, carbon monoxide, and suspended particulates. The Clean Air Act Amendments of 1977 specified that the national ambient air duality standards were to be met by 1982, with provision for extension of the deadline five years to 1987. However, the national ambient air quality standards were not met in the Bay Area by the end of 1987. The Clean Air Act Amendments of 1990 require that non-attainment areas develop plans and strategies that will reduce pollutants by 15 percent during the first six years, then 3 percent annually thereafter until the standards are met. Non-attainment areas must meet air duality standards within 5 to 17 years, depending on the severity of their pollution problems. The California Clean Air Act, enacted in 1989, requires local air pollution control districts to prepare air quality attainment plans for ozone and carbon monoxide. Generally, these plans must provide for district-wide emission reductions of. five percent per year averaged over consecutive three-year periods. The Act also grants air districts explicit statutory authority to adopt indirect source regulations and transportation control measures, including measures to encourage or require the use of ridesharing, flexible work hours, or other measures which reduce the number or length of vehicle trips. The area-wide plan required by the California Clean Air Act has recently been adopted (BAAQMD, 1991). The plan proposes to impose controls on stationary sources (factories, power plants, industrial sources, etc.) and Transportation Control Measures designed to reduce emissions from automobiles. The Bay Area '91 Clean Air Plan forecasts continued improvement in regional air duality. An analysis of carbon monoxide trends in the Bay Area shows attainment of state standards throughout the air basin by the mid-1990x. However, implementation of the plan would not provide for attainment of the state ozone standard even by the year 2000. f. Standards of Significance Appendix G of the CEQA Guidelines establishes that a project will normally have a significant impact on air quality if it will "violate any air quality standard, contribute substantially to an existing or projected air quality violation, or expose sensitive receptors to substantial pollutant concentrations." For the purposes of this study, a significant impact on local air quality is defined as an increase in carbon monoxide concentration causing exceedance of the state or federal standards. For regional air quality a significant impact is defined as an increase in emissions of an ozone precursor, sulfur dioxide, or PMI a exceeding the Bay Area Air (duality Management District's recommended Michael Paoli and Associates H-5 thresholds of significance. The BAAQMfJ considers increases in emissions of regional pollutants of 150 pounds per day to represent a significant adverse impact (BAAQMD, 1985). IMI!ACIS ANL! MITIGATION MEASURES 2. a. Impact Construction equipment and vehicles will generate dust which will result in locally elevated levels of Mo Dust generated by equipment and vehicles will be the major impact on air quality caused by construction. Fugitive dust is emitted both during construction activity and as a result of wind erosion over exposed earth surfaces. Clearing and grading activities comprise the major source of construction dust emissions, but traffic and general disturbance of the soil also generate significant dust emissions. Construction dust impacts are extremely variable, depending on such factors as wind speed, soil type, soil moisture, the type of construction activity, and acreage affected by construction activity. The highest potential for construction dust impacts will occur during the late-spring, summer, and early fall months when soils are dry. Earthmoving and grading are the operations most likely to generate the bulk of dust emissions. . A rough estimate of uncontrolled construction PM7c emissions is 0.6 tons per , month per acre of active construction. PMic emissions by equipment type are shown on Table H-3. The effects of construction activities will be increased dustfall and locally elevated levels of PM,o downwind of construction activity. Construction-related air quality impacts on local PMlo levels are considered to be potentially significant on a localized basis. Mitigation Measure To ensure that construction mitigation is utilized, final approval shall not be given to any development until the developer/contractor submits a satisfactory construction mitigation plan. This plan shall specify the methods of control that will be utilized, demonstrate the availability of needed equipment and personnel, and identify a responsible individual who.can authorize the implementation of additional measures, if needed. The construction dost control mitigation plan shall include the following: • Suspend earthmoving or other dust-producing activities during periods of high winds. , t H-6 Michael Paoli and Associates 3 TABLE H-3 EMISSION RATES FOR DIESEL-POWERED CONSTRUCTION EQUIPMENT Equipment T Emission Rate unds/hour for: TOG CO NOx PM10 sox- ...._. Sora r 0.3 1.0 3.8 0.4 0.5 Motor Grader 0.1 0.2 0.7 0.1 0.1 Off-Iiighway Truck 0.2 1.8 4.2 0.3 0.5 Roller 0.1 0.3 0.1 0.1 0.1 TOG -- 'Total Organic Gases CO -- Carbon Monoxide NOx -- Nitrogen Oxides PMjo — Particulate Matter, 10 micron sox — Sulfur Oxides Source: U.S. Environmental Protection Agency, Compilation of'Air Pollutant Emission Factors, Volume H Mobile Sources. AP-42, Fourth Edition; 1985. Michael Paoli and Associates H-7 • Provide equipment and staffing for watering of all exposed or disturbed soil surfaces at least twice daily, including weekends and holidays. An appropriate dust palliative or suppressant, added to water before application, should be utilized. • dater or cover stockpiles of debris, soil, sand, or other materials that can be blown by the wind. • Sweep construction area and adjacent streets of all mud and debris, since this material can be pulverized and later resuspended by vehicle traffic. • Limit the speed of all construction vehicles to 15 miles per hour while on site. Level of Significance The above mitigation measure will reduce the impact to a level of insignificance. b. Impact Traffic generated by the project will increase carbon monoxide emissions On the local scale, the project will increase traffic on the local street network, thereby increasing carbon monoxide levels along roadways used by project traffic. Carbon monoxide is an odorless, colorless poisonous gas whose primary source in the Bay Area is automobiles. Concentrations of this gas are highest near intersections of major roads. The CALINE-4 computer simulation model is used to characterize the dispersion of pollutants generated by traffic. CALINE-4 was applied to six intersections near the project site. These were selected as having high volumes and/or the largest changes in volumes due to the project. The model results were used to predict the maximum 1- and 8-hour concentrations, corresponding to the 1- and 8-hour averaging times specified in the state and federal ambient air quality standards for carbon monoxide. The CALINE-4 model and the assumptions made in its use for this project are described in Appendix H-1. Table H-4 shows the results of the CALTNE-4 analysis for the peak 1-hour and 8-hour traffic periods in parts per million (PFM). The analysis was carried out for existing traffic conditions and with the addition of project traffic. The 1-hour values are to be compared to the federal 1-hour standard of 35 PPM and the state standard of 20 PPM. The 8-hour values in Table H-4 are to be H-8 Michael Paoli and Associates compared to the state and federal standard of 9 PPM. Concentrations are for receptors located 25 feet back from the roadway edge. Existing concentrations at six intersections are below applicable state and federal 1-hour and 8-hour standards. The addition of project traffic will increase concentrations, but they will remain below the most stringent state or federal standards. Although development of the proposed project will increase traffic on the local street network, it will not substantially increase pollutant concentrations.and will not result in violations of the carbon monoxide air duality standards. Mitigation Measure No mitigation measures are required. However, the mitigation measures applicable to Impact c, below, will also reduce carbon monoxide emissions. Level of Significance This impact is considered to be less than significant. c. Impact The project will q fect regional air quality as a source of reactive organic gases, oxides of nitrogen, sulfur dioxide, and PMIO The project will be an indirect source of emissions, in that it will generate vehicle trips. Trips to and from the project will result in air pollutant emissions affecting the entire San Francisco Bay air basin. To evaluate the emissions associated with the project, the URBEMIS-3 computer program, developed by the California Air Resources Beard, was utilized. The URBEMIS-3 program and the assumptions made in its uses are described in Appendix H-l. Construction equipment is a source of pollutant emissions during periods of construction activity. Table H-3 shows emission factors for various pollutants for typical diesel-powered construction equipment. The actual exhaust emission from construction on any given day will depend on the number, type, and hours of operation of each piece of equipment. In addition to being an indirect source, residential development can be considered an area source in that it contains a number of dispersed and intermittent sources of pollutants such as space and water heaters, household paints and solvents, fireplaces and woodstoves, lawn mowers, and other equipment. Published annual emission factors were applied to the project to estimate emissions from this source. Residential emissions are shown in Table H-5. Michael Paoli and Associates H-9 TABLE H•4 WORST CASE CARBON MONOXIDE CONCENTRATIONS, IN PPM Intersection Case I Case 2 Case 3 Case 4 I-Hr 8-Hr 1-Hr 9-Hr I AHr 8-Hr 1-Hr 8-Hr. B alfouff airview 6.4 4.5 9.9 5.4 5.3 3.7 5.7 4.8 Balfour/Walnut 7.1 5.0 9.1 6.4 5.8 4.1 5.5 3.9 Lone Tree m ire 7.8 5.5 8.8 62 6.1 4.3 5.4 3.8 Lane Tree/Sly 4 8.6 6.0 8.7 6.1 5.0 3.5 5.3 3.7 Lone Tree/Mllcrest 7.9 5.5 8,8, 6.2 6.9 4.8 5.9 4.1 Lane Tree/Deer Valle 6.3 4.4 7:6 5.3 11:3 7.9 11.0 7.7 Case I = Existing (1991) Case 2 = Existing + Project (199 1) Case 3 = Cumulative with Delta Expressway (2005) Case 4 = Cumulative without Delta Expressway (2005) ' f i Source. California Department of Transportation, CALINE44--A Dispersion � Model far Predicting Air Pollutant Concentrations Near Roadways, Report No. FHWAICA,1T'L-84-15, 1984. H-10 Michael Paoli and Associates Several of the materials used during construction of the project will be a source of organic gas emissions. Solvents in adhesives, non-waterbase paints, thinners, some insulating materials, and caulking materials will evaporate into the atmosphere and participate in the photochemical reaction that creates urban ozone. Asphalt used in paving is also a source of organic gases for a short time after its application. The daily increase in regional emissions associated with the project in the year 2000 is showh in Table H-5 for reactive organic gases and oxides of nitrogen (two precursors of ozone), sulfur dioxide and PMIO. Guidelines for the evaluation of project impacts issued by the Bay Area Air Quality Management District consider emission increases for regional pollutants to be significant if they exceed 1501 pounds per day. Project emissions shown in Table H-5 will exceed the BAAQMD criterion for two of the four pollutants, so the project is considered to have a significant effect on regional emissions. Mitigation Measures (1) The most commonly applied mitigation measures for indirect sources of pollutants such as the proposed project for air quality purposes are Transportation Demand Management (TDM) programs to reduce trip generation, TIM is a major strategy for the attainment of air quality standards in the region. The concept of TSM/TDM is embodied in the proposed Transportation Control Measures contained in the Bay Area '91 Clean Air Plan. It is also one of the required elements of the Congestion Management Plan for the County. As currently defined, TSM/TIM strategies apply to employment-generators and not residential uses. The proposed project shall comply with the Transportation Control Measures contained in the Bay Area '91 Clean Air Plan. (2) The proposed project includes pedestrian facilities and bicycle lanes to promote non-auto travel within the project. However, there appear to be several additional measures that shall be implemented to further reduce automobile travel: Bicycle parking areas shall be provided within all recreational and commercial uses within the site. • The City and the Applicant shall commit to a coordinated effort to work with transit agencies to extend existing transit routes to the project. The Applicant shall be required to dedicate right-of-way for bus turnouts fronting the project site on Balfour Road and to provide bus shelters. Michael Paoli and Associates H-11 TABLE H•5 PROJECT-RELATED REGIONAL EMISSIONS, IN POUNDS PER DAY r Pollutant ROO NOx PM Stix Auto Emissions 377.5 625.7 58.6 69.8 Residential Emissions 203.5 36.7 12.0 2.2 Total Emissions 581.0 662.4 70.5 72.0 BAA MD Threshold 150.0 150.0 150,0 150.0 RUG - Reactive Organic Gases NOX - Nitrogen Oxides PM3o - Particulate Matter, Ten Microns SOX - Sulfur Oxides Source: Bay Area Air Quality Management District, Air Quality and Urban } Development - Guidelines, 1985. ` ` i H-12 Michael Pauli and Associates f � The Applicant shall be required to participate in the construction of a parr-and-ride facility to be located at the Delta Expressway interchange with Balfour road. Level of Significance These mitigation measures have the potential to reduce daily trips by about 10 percent aUd air quality impacts associated with auto use will be reduced accordingly. However, even with reductions of this magnitude the impacts of the proposed project on regional air quality will remain significant. 3 . a. Impact Buildout of the Brentwood General Plan area in accordance with the cumulative development scenario will generate increased carbon monoxide emissions Carbon monoxide concentrations have also been estimated for year 2005 traffic conditions with cumulative development both with and without the construction of the Delta Expressway. Table H-4 shows that in 2005 carbon monoxide concentrations are expected to be below current levels, despite cumulative traffic increases. This is due to recently adopted emission control programs, which are expected to dramatically reduce vehicle emission rates. Mitigation Measure No mitigation measures are required. Level of Significance Because of improved emissions control programs, the effect of increased development on carbon monoxide levels is expected to be less than significant. b. Impact Buildout of the Brentwood General Plan area in accordance with the cumulative development scenario will result in increased emissions of ozone precursers The growth in population and vehicle use that will result from buildout of the Brentwood General Plan area in accordance with the cumulative development scenario will affect the emission of regional pollutants such as reactive organic gasses and nitrogen oxides. Current projections are that regional emissions of these pollutants will decrease in the future, despite cumulative growth in Michael Paoli and Associates H-13 population and vehicle use, due to regional programs for reducing emissions that are in place or currently being considered. Continued improvement in regional air quality is projected through the year 2440, although attainment of all air quality standards throughout the entire Bay Area Air Basin is not projected by the year 2440 (BAAQMD, 1991), Mitigation Measure New development shall comply with emissions reduction programs implemented in accordance with the Bay Area '91 Clean Air}plan. Level of Significance Because air quality standards throughout the Bay Area Air Basin will not be attained by the year 2044 even with the implementation of regional emission reduction programs, this impact is considered to be significant and unavoidable. x f H-14 Michael Paoli and Associates SECTION I NOISE SETTING, IMPACTS, AND MITIGATION MEASURES 1. SE1' :Q P W a. Noise Sources Based upon field observations, existing noise sources at the project site and the surrounding environs include local roadway traffic, agricultural activities, and aircraft overflights. b. Ambient poise To determine background or ambient noise levels at the project site and adjacent properties, Bicwn-Buntin Associates, Inc. {BBA} conducted continuous 24-hour noise monitoring on the project site on October 24-25, 1991 and utilized short- term noise level data collected by BBA for the pending City of Brentwood General Plan update. Figure 1-1 shows the .measurement locations. The noise level measurements were made to evaluate existing noise levels and to aid in the recommendation of noise mitigation measures where appropriate. The results of the continuous 24-hour measurements are shown graphically in Figure 1-2. Table 1-1 provides a summary of the continuous and short-term noise measurement results. TABU I-1 SUMMARY OF MEASURED AMBIENT NOISE LEVELS Site Irate Ldn, dB On Project Site* October 24-25, 1991 47.0 Corner of Continente Griffith** November 7-8, 1990 47.0 *Continuous 24-hour measurement site. **Estimated short-term measurements conducted for general flan Update. Short-term measurements ranged between 40 and 50 dB Leq. The continuous 24-hour monitoring results indicate that the project site is relatively quiet, with brief, single-event noise levels between 60 and 70 dB. Michael Paoli and Associates T.l w,sww S.Ss�wrrsw ' arr'M'tiWgpW Y E6Hi. '. ti L} 1l iq+ LL. r' Tr !Ss fkSltt'fyR 1 µ• —---------- OP-8000 l Y .F , t 4• Zlr.iLM a. is 'tit'• � ys... �. ; p •.._�o...•J \, f�•, �'` t .. �,1�' :�e ��!3` ,r•. a�t,ra t��ctr,.fit ;4ix;. a CW*" ra►a�t /� w�urwe�w FIGURE I-1 PROJECT SITE Short-Term Traffic Noise Monitoring Site 24-Hour Noise Monitoring Site ( BBAt 4 CL x 4 co r� oz t 04 �s co UD co 1 1 c� cr) v N v C4 C. Existing Traffic Noise The Federal Highway Administration (FHWA) Highway Traffic Noise Prediction Model (FHWA RD-77-108) was employed for the prediction of traffic noise levels. The FHWA model is the analytical method currently favored for traffic noise prediction by most state and local agencies, including the California Department of Transportation (Caltrans). The model is based upon- the CAL'VENO noise emission factors for automobiles, medium trucks, and heavy trucks, with consideration given to vehicle volume, speed, roadway configuration, distance to the receiver, and the acoustical characteristics of the site. For an explanation of terms used in this section, see Appendix T-1.' The FHWA model was developed to predict hourly Leel values for free-flowing traffic conditions, and is considered to be accurate within 1.5 dB. To predict Ldn values, it is necessary to determine the day/night distribution of traffic and adjust the traffic volume input data to yield an equivalent dourly traffic volume. Traffic noise measurements were conducted at the project site on October 24, 1991 for a period of 15 minutes (see Figure I-1). The measurements were made to evaluate noise exposure due to traffic on Balfour Road. A concurrent count of traffic on Balfour Road was also made and was projected to obtain hourly traffic volumes. Instrumentation consisted of a Larson Davis Laboratories (LDL) Model 800E precision integrating sound level meter which was calibrated in the field before use with a Bruel & I{.jaer (B&K) Type 4230 acoustical calibrator. The purpose of traffic noise level measurements is to determine the accuracy of the FHWA model in describing the existing noise environment at the project site. Noise measurement results were: compared to the FHWA model results by entering the observed traffic volumes, speed, and distance as inputs to the FHWA model. The results of this comparison are shown on Table I-2. The FHWA model was found to overpredict traffic noise levels at the calibration site by 1.1 dB. Therefore, the model is considered to accurately predict traffic noise levels from Balfour Road on the project site. TABLE 1.2 COMPARISON OF FHWA MODEL TO MEASURED NOISE LEVELS Vehicles/Hr. Med. Hvy. Posted Distance Measured FHWA Roadw!X Autos Truck Truck (Feet) Leg, dB L,e ,* dB Balfour Road 56 8 4 F5-5—m— 50 1 57.5 58.6 *"soft" site assumed. I-4 Michael Paoli and Associates Traffic data were obtained from DKS Traffic Consultants to determine Average Daily 'Traffic (ADT) volumes for existing and future conditions on local roadways. Day/night traffic splits and truck mix were based upon BBA file data since these data were not available from the EIR traffic consultant or the City. A summary of traffic data is shown in Appendix I-2. The FllWA model was used with the assumptions contained in Appendix 1-2 to calculate existing noise levels. The distances to the existing 60 and 65 dB Ldn and peak hour L10 noise contours for traffic on local roadways are contained in Table l-3. TABLE 1-3 EXISTING TRAFFIC NOISE LEVELS ME=to nntour SOUR ve Roadwa ADT 60 ZM (Feet) 63 ZM 75 Feet L10_ Ldn_ L10 L_dn _L10 Balfour Road: East of Minnesota 7,160 144 230 67 106 64.3 67.3 West of Minnesota 6,580 136 215 63 100 63.9 65.9 The L10 and Ldn noise levels were also calculated at an arbitrary distance of 75 feet from the center of roadways, as shown by Table I-3, for later comparison with future traffic noise levels. 2. a. General Noise impacts due to and upon the project were evaluated using the City of Brentwood noise Element land use compatibility criteria, the California Office of Noise Control recommended land use compatibility criteria, and an accepted methodology for evaluating people's reactions to changes in noise levels. The existing City of Brentwood Noise Element establishes exterior noise level standards (referred to as Noise Abatement Priorities) for various land use categories. The exterior noise level standards are expressed in terms of the descriptor, The Federal Highway Administration (FI-IWA) and Caltrans had previously used the L10 descriptor as a means of evaluating peak hour roadway traffic noise levels, and it is generally considered to be equivalent to the Nlichael Paoli and Associates 1-5 measured or modeled Leq value plus 3 dB. The current City of Brentwood noise standards are shown in Table I-4. TABLE I-4 CITY OF BRENTWOOD CURRENT NOISE LEVEL STANDARDS LanU Use Accu taeRlo-F 173Ise Uvel psi t� Parks and URn Space 39 an HosRitals 93 un Rest Homes 93 dB C: oo S 93 ag IreFul Commercial of ices an urc es overnmen 1�St `i70 ZM are ousin The California Office of Noise Control (ONC) "Guidelines for Preparation and Content of Noise Elements of the General Plans" uses the Ldn descriptor to determine land use noise compatibility with respect to. noise. The ONC guidelines are shown in Figure I-3. In addition„ the ONC guidelines establish interior noise level standards for noise-sensitive land uses which are intended to provide an adequate environment for indoor communication and sleep. The City of Brentwood is presently updating its General Plan. The General Plan Update includes the preparation of a new Noise Element. BBA is preparing the Noise Element for the General Plan Update, and the Land Use Compatibility Guidelines contained in the Draft Goals and Policies submitted to the City of Brentwood are similar to those shown in Figure 1-3. Another means of assessing noise impacts is to estimate public reaction to the change in noise level which results from the project. Table I-5 is commonly used to show expected public reaction to changes in environmental noise levels. . This table was developed on the basis of test subjects` reactions to changes in the levels of steady-state pure tones or broad-band noise and to changes in levels of a given noise source. It is probably most applicable to noise levels in the range of 50 to 70 dB, which is the usual range of voice and interior noise levels. Y Changes in noise levels that are 3 dB or more should be considered significant when evaluating related impacts. 1-6 Michael Paoli and Associates 9 t 7 FIGURE X 3 LAND USE CONTPATIT UM FOR COMMUNITY N©I5 E ENVIRGIN MEN TS INTERPRETATION COMMUNITY NOISE EXPOSURE LAND USE CATEGORY 1dn OR CNEL, d$ �� NORMALLY 4CCEPTA8LE 55 60 65 70 75 80 Specified land use is satisfactory, based upon the RESIDENTIAL assumption that any buildings :j`::•';:;:;:; involved are of normal conventional construction, without any special noise TRANSIENT LODGING insulation requirements. - MOTELS, HOTELS CONDITIONALLY ACCEPTABLE SCHOOLS, LIBRARIES, Now construction or development CHURCHES, HOSPITALS, M, should be undertaken only after a NURSING HOMES ' '�` ,': detailed analysis of the noise reduction requirements is made and needed noise insulation AUDITORIUMS, CONCERT features Included in the design. HALLS, AMPHITHEATRES, Conventional construction, but SPORTS ARENAS with closed windows and fresh air supply systems or air PLAYGROUNDS, conditioning will normally NEIGHBORHOOD PARKS suffice. GOLF COURSES, RIDING ??f «i NORMALLY UNACCEPTABLE STABLES, WATER RECREATION, CEMETERIES New construction or development should generally be discourged. OFFICE BUILDINGS, BUSINESS '� �' If new construction or COMMERCIAL AND development does proceed, a PROFESSIONAL ;:: ,::}:: detailed analysis of the noise reduction requirements must be INDUSTRIAL, MANUFACTURING . �. • . made and the needed noise UTILITIES, AGRICULTURE insulation features included in ;;;;:;;:,};•; the design. CLEARLY UNACCEPTABLE New construction or development should generally not be undertaken. fEB B A]�J TABLE I-S SUBJECTIVE REACTION TO CHANGES IN NOISE LEVELS OF SIMILAR SOURCES Change in Level, Subjective Factor,Change in dB Reaction Acoustical Energy 1 - Im ice tible Exce t for Tones 1.3 3 Just Barely Perceptible 2.0 6 Clearly Noticeable 4.0 10 About Twice or Halfl as Loud 10.0 Source: Architectural Acoustics, M. David Egan, 1988 b. Impact Increases in noise levels due to project-related traffic will impact noise-sensitive land uses in the project vicinity The FHWA traffic model was again employed to determine changes in traffic noise levels based upon future traffic volumes. From the Existing plus Project portion of Table I-6, it is apparent that project-related traffic noise level changes will exceed 3 dB on Balfour Road, between Minnesota and Concord Avenues. This change should be considered significant. Residential land uses located within the 65 dB Llp contour would be considered under the current General Plan Noise Element as being impacted by traffic noise. The 65 dB L10 noise contour within the project site extends 134 feet from the centerline of Balfour Road and 124 feet from the centerline of Concord Avenue (see Figures 1-4 and 1-5). The Balfour Road 65 dB Llp contour would pass through 39 single family lots and the northern portion of the low density cluster housing area. Along Concord Avenue, the high density cluster housing area, the day-care site, and the SF-6000 area would be affected. Residential land uses located within the 60 dB Ldn contour would be considered to be impacted by traffic under the ONC guidelines and proposed General Plan Update Draft Noise Element guidelines. The 60 dB Ldn contour within the project site extends 183 feet from the centerline of Balfour Road and 168 feet from the centerline of Concord Avenue (see Figures 1-4 and 1-5). The Balfour Road 60 dB Ldn contour would pass through 41 single family lots and the extreme northern portion of the tow density cluster housing area. Along { Concord Avenue, the high density cluster housing area, the day-care site, and the SF-6000 area would be affected. j } 4 { F 1-8 Michael Paoli and Associates s i x t TABLE 1.6 FUTURE TRAFFIC NOISE LEVELS r istance to ntour Soundlevel Scenario/Roadwa (Feet) 75 Feet Change* ME 1 65 m r;; I Lj() LIF L Existing lus t"ro`ect« Balfour Road. East of Minnesota Avenue 175 276 81 128 65.5 68.5 +1.2 Btw, Minnesota/Concord 239 376 111 174 67.5 70.5 +3.6 West of Concord Avenue 183 289 85 134 65.8 68.8 +1.9 Concord Avenue: 168 268 78 124 65.3 68.3 N/A Cumulative without Delta Ex resswa Balfour Road. :East of Minnesota Avenue 158 268 78 124 65.3 68.3 +1.0 Btw. M.innesota/Concord 283 445 131 206 68.5 71.6 +4.7 West of Concord Avenue 249 394 116 183 67.8 70.8 +3.9 Concord Avenue: 179 285 83 132 65.7 68.7 N/A Cumulative with Delta Ex resswa Balfour Road. East of Minnesota Avenue 183 290 85 134 65.8 68.8 +1.5 Btw- Minnesota/Concord 335 527 155 245 69.7 72.7 +5.8 West of Concord Avenue 217 343 101 159 66.9 1 69.9 +3.01 Concord Avenue/Delta Ex w Distance varies -see Figures 1-8 and 1-9 N/A *Change in noise levels arc relative to existing conditions. Existing traffic data was not available for Concord Avenue. Michael Paoli and Associates 1-9 ti 1 @.i x \ }; t �� ,. •� � r sti r �.r '� 1' �b ia'O' • i �yyrt � t a rc a i�'xr;�i, t;.•/'' .r r'� r �� f r. P':w� * � � � ' lo o� s i sii�ia1"�,,,�,'r•• ,,-�" `,�•� ,,� ti � �° *.'9Jj i i j�� '` < �� TW 1L # tAt. 'r t. / �_ ���� �• � �.a'"'{rt 1tt;� 'lj. , � r�r� � i 7..'�� •.. y�rb � �' , ' IF a ti x ftctyr :� .rY '3 x s ,�-� tixt � �tr`. ' �� �., y�/, ` s'• t t'ter; fir."C� .p wo i x i ► t to Ul r i x x r �{ �, x x x i. i x 'x�x s ��„r t �Y rx ♦ p'C+s s x �•,"r'w°,���r�,�1:R. ..�^'" ` Ito*t 1 x 1 � WXTSO a . ... i •� �i JIM- U)"O� tit M l � `ti ,F r'4 � �, + �.� Z i �+ .�•Fa � iia E C3 �. cos ,Y} f � ,� ! �• r-�,.,J° ,, � , �J �r, x 8� fit LO= #+1 lux �. •r(y! J ii rl 11�1'°rSt�•��. �uf YC� S{j( � �} 7 y/s y+•s} � j; r•t, a { • l ', r,,J p +:t' I� E J'` '•'+'''+ { I ✓w's,Ta+"S,r'+ �i + l-�'•.'q','�' 't \,` ■ ry�a Pi fP i Yf t f 5a i I ° .� \ a .C' r:S1,0 C93 r illy ..tI� a��i � t I� �i: t y t�•tt �� J LIU r- xc r, I.Q C1 T CiJr r ```,� �. s '�• `yt��i}�1 � ` � a,•}�} �i�}$2�����ji}�t}F�t}�11�� �jCl �' J d �'�• `t w ..a `t� r x +It 3 i�• C,lt��j `'.' } � ��y�.SS i'�a�; {.. W i`^..•.,., �"'� ,y'`711 � � Z YY i ,1�; 5 tt, C r..� t 3 � t�Yt F}a�r.��� .T, S�°S }- ,���• � �. ,'^�r ',�F� #rye• 3 '� � u r�..,,, i ,c' f✓ s "°ia�:•�' tk''•��,�,,,1+/i i {rn t �'� \N ,\ ,.r 4W r fa�✓ .,,�„�•Y��y` 's r• 5 t i 3J a �.+ ' , r �� � ��lr rf • � `s lJ. E: �,��gff'.'� � t r�5•y ,5 � s';'' d �li't�i IQ �. .l l�}�S 1�/ + x p.� _. III� � t � _ •.C`+"(.;� 3 }�C 1V` �+ � � � r > Wr +✓. 'tib?I s ;F x ,I i r t�,:'' 'ti f y i�'#'tsy : `�'�1 � r � ! 3= x a �, • ,� 4 � t��i tr. ,� t �L ' a# � � � t„ r W „� 0 ' �•,,,,.;�„, ti.1 S;ir s - J- ,"f' � � .w., t `:�� C i tSm .e Cal S tat S ' ' yam J' rJ• �`` J S: tlr,t� f Q1 Witt 1 P P1 Lu ,z Mitigation Measures (1) Noise barriers in the farm of earthen berms, masonry walls, or other non- noise sensitive buildings can be placed between the roadways and noise- sensitive receivers. As an example, noise levels impacting the residential uses located in the northeast corner of the project area; shown on Figure I-1, could be reduced to less than the 60 dB Ldn or 65 dB L 10, with a sound wall 71/2 feet and 51/2 feet in height, respectively. It is assumed that the sound wall would be located at the property line (70 feet from the roadway centerline), and the residential building facade located 75 feet from the roadway centerline. (2) Noise-sensitive land uses located inside the 65 dB Ldn noise contour described in Table I-6 shall have a detailed interior noise analysis conducted to assure that a 45 dB Lein interior noise level is maintained. Floor plans and facade construction details would be needed to conduct an analysis of this detail. However, standard construction practices are expected to provide sufficient noise reduction for residences located outside the 65 dB Ldn contour, provided that mechanical ventilation is included in the project design to provide adequate air exchange. Level of Significance The mitigation measures will reduce the impact to a level of insignificance. c. Impact Noise from project construction activities would add to the noise environment in the immediate area Activities involved in construction would generate noise levels, as indicated in Table 1-7, ranging from 70 to 90 dB at a distance of 50 feet. Construction activities would be temporary in nature and are anticipated to occur during normal daytime working hours. Construction noise impacts could result in annoyance or sleep disruption for nearby residences if nighttime operations occurred or if unusually noisy equipment was used. During the construction phase, noise would also be generated by increased traffic on area roadways, especially as a result of truck traffic associated with transport of heavy materials and equipment. This noise increase would be of short duration, and would probably occur primarily during daytime hours. x . w 1-12 Michael Paoli and Associates ; i 4 r ' TABLE I-7 CONSTRUCTION EQUIPMENT NOISE e of ESujRment Maximum Sound Level at 50 Feet Sara ers 88 dB Bulldozers 87 dB HeavX Trucks 88 dB Backhoe 8.5 dB Pneumatic Triols 85 dB Mitigation Measures (1) Construction activities shall take place during daylight hours. (2) All construction equipment shall be equipped with effective mufflers. (3) Stationary equipment and vehicle staging areas shall be located as far as possible from noise-sensitive receivers. Level of Significance The above mitigation measures will reduce the impact to a level of insignificance. 3. CXIMULATIYE IMPACIS AND MITIGATION MEASURES a. Impact Increases in noise levels due to cumulative traffic increases will impact noise-sensitive land uses in the project vicinity (1) Without the Delta Expressway From Table I-6, it is apparent that cumulative traffic noise levels will exceed 3 dB along Balfour Road, between Minnesota Road and Concord Avenue, and west of Concord Avenue. Residential land uses within the 65 db Lip contour are considered under the current General Plan Noise Element as being noise impacted. As shown by Table I-6 and Figures I-6 and I-7, the Balfour Road 65 dB Lip noise contour impacts approximately 43 lots in the SF 4000 and SF 45110 residential areas of the project, The Concord Avenue 65 dB Lip centaur impacts the lot designated for Day Care. The proposed City Noise Element and ONC guidelines set Michael Pauli and Associates I-13 g 4 q l �� �t o ��.,,,,,,.•- y 1 �i + � t �� .�,'�' vats r + "" s, �{•� t� S?' . IF .r•5 � } t /' �,t '� rU�r \� •" '++ �1.t, t 4� 1 r s� y * s r� s t� � ti .� "ft ��� ~~t� ,,;, + sS:t ':��t lj • • •.t � t`1. '� "� ♦. "� L w�" t � tj 9„yZ V''• Vt c' � (f ` ti � J� 1 1LL�� R 1+ i t � ,S pqf � t�r�� 1;9�J�,"� R i{ yt�� / "'rr'w+ v .�✓�.�5+' � { •�"1�'Ott fit+ �1 '"'� � �` 1 , +► t L � �'t � s••tss°• ,, / t.,!' .• r'�' e � t `�' I'�Yr• J'r • • )'+r n�" .�`. s �rs.�,�e,*, + +est ,,,,,,,."� � .i!°` ��1*,y� �t ��`y, • • �l� �' e f �A�t �xCt�•�gttr�� �+,r��'/ ,' ���'� "t'��� �`�' � � ,s� "'� �` ���,�M+rt ,:t' � hr'� � � Y'kll,'t1���. t,..• ! t` �'J'r„,l .,....,,.. rf� s'� /f#�. � r�%rte''" 1& .++"'.�� �, �.�aE'O��is�"O.-,a 1,�y�� lti6�ts� � Pi � t~� ♦ ��p�{ t' +' t`)"!.. .�, �!r y '� \ �{ �' tt+�w� Hyl � �� �. �` ' �i� r • • r 'i�,�}rxrs'`� r +j'1 70 ,1 4 µ T+ �� L� ; ` "1� ''#��Sti` ���`� ,•.. w itW i,�t sa'' v �+, i'7. • 4 t y s s i,,r„ r • s" yrr r *ti j tx r• �' t 'o► JA l+ s � t t i n /,,rr�J �i • � r y��j �r1y wom lilt 00, �`'�} Y f { # # i fit�� y''�,i �.. ��;W1. ' �•K`� �(� It 'U J yi #ty ,UK `` `,'��, # ,y. # ;i 'r/ia•.f.,".- r "-{�,"a t•�e�{. 1 tiy••. „� i i A r'1 ri rY{{ tz p .".y•1„y # #tf � '','l� r +u}iC� y rti ri F �` � w � i ISt ..�.,r/a•;1( b .'..6 +i'.tri�(+'�...,'�` o't% r �" � \ � �� ���� '1 kit1 151 Q + r' � + °r a3 "a• \ �3 .�'�t at,tt�l{ {il ; `fit �� zact } I�� 3 rr�l� �t'S1'. '/ ;r} r i i� ti 5 =•�p4t5����1��5�t.t. I a i '{�, Y a� �i a���t � F +,+ "". .�� ,•'�' : } 1//r, i It t} Z i '1,�.��1�,� r }y � 6.#�a �jl v���� #�.� �y�� 'I, hilt 10 �.�1 •'r �, k+'~ <<>4'ra+ r iY i �i �. �{i ptkt�. r� �/�t ' ,dam,..,,•'`' tt'';•,tk�: � a t .�i{ Vii} `s i ,fix. �•. � � C� rf t� ,r�� ii � ni }1t, � 'jit i z jz '•.Y.'t i 44„�,`*.,' w} to 1,}l '� ► t�, s. " t # 'i '♦ i a3"�{ t"'t{ t...qr\".,a'� 0i :.O= t #7 {. : ; 4" a ;0 ai it���1���i S ��i iil4�+ i7c -_��r � �'# # fr 'y. ext/ •+/ r� �� t, i� os 0 lip � fi ,may (,4r i ' it� ii ' '..••-. low It .1--^ 60 dB Ldn as a standard for land use compatibility. Along Balfour Road, approximately 65 residential lots would be impacted by the 60 dB Ldn contour, and along Concord Avenue, the Day Care lot would be impacted. {2} With the Delta Expressway From Table I-6, it is apparent that cumulative traffic noise levels will equal or exceed 3 dB along Balfour Road, between Minnesota road and Concord Avenue, and west of Concord Avenue. The Balfour Road 65 dB L10 contour will impact approximately 40 residential lots and the 60 dB Ldn contour will impact approximately 70 lots in the SF 4000 and SF 4500 portions of the project. As shown by Figures I-8 and I-9, there will be a Qgined noise impact from traffic on Concord Avenue and the Delta Expressway. Approximately 36 lots in the SF 5000 and SF 6000 portions of the project, plus the Day Gare lot, will be impacted by the 65 dB L 10 contour from the combined traffic noise sources. � The Concord Avenue/Delta Expressway 60 dB Ldn contour will impact approximately 52 lots, plus the Day Care lot. Mitigation Measures See mitigation measures for Project Impact b. Level of Significance The mitigation measures will reduce the impact to a level of insignificance. . j 1-16 Michael Paoli and Associates �i M ` it.. 1 � � �' ��, --.""" '�,,;"", t � Yds #� � �,+ /�` f�lf��f.,� l• {� `\ »...." ,,,.,..'°' , s ems `s1 ,✓' ,!', > '�>> p"'"'". *�cY # 1 • ��' ._ rp` "th1y irr x '. * ! l�, ! r if s+` • t1r; s f Yr• Ry} V S sy f 1 a t fJJ Y # fl! ! �� � i# '*'«'` ✓ � � � � a_ ,wwY {yi, w.'f`f'"� +✓ lr+r� ! ✓. .I '�..� 17s ("�,„ .7`. Oki �yt� r seM,.r*+ ���� ' •lf+ +'�`�y!� � ;I s ss p�f}15 i e�t�ypFSy,,y,,,�,ti �� '��'� �ti1+:L .+*"`as t$+�"fit"►l g#�1. w t #��p� s tttjj.' ., •, f t,,. 1 . f' ..sf^ey� � .i* •''j,� r"'� ���t� �1� .+av+ ..fit +� s /�i.!! ~�f, :� to PC to ell w + ''! ',, '� �\e \`° '"� • `+1.03 ► �,�. ,r` �-�,�M *;Y fid+! •.!f � Y + ,, �'� ,��i' �+✓ � }"''1'7 y1 '!�'!►t� #� w��nA � � =t", dt Y 4.. d .d.+.r`! � �i Cn� Y i ti . r #. �{ ; 1'•{ --�" Y� a - ty3 tri ul tl y w } • '► ,�s+ s K x # # `fit�`�t!� « �� f�1 Lw� i �C � 4A A r g d ��`* 1 ,! r SECTION J STORM DRAINAGE AND FLOOD CONTROL SETTING, IMPACTS, AND MITIGATION MEASURES 1.. SETTING The project site is drained by two creeks, both of which. are tributaries of the regional drainage channel, Marsh Creek. The northern portion of the site is drained by Deer Creek, which flows easterly through the site and thea turns north under Balfour Road. There is a detention basin located on Deer Creek, approximately one mile west of the project site. The southern portion of the site is drained by Dry Creek, which flows through an existing reservoir facility located within the site and then exits the site to the east under Concord Avenue. Bath of these watercourses are seasonal in nature and tend to be dry much of the year. The upstream watershed of both creeks is undeveloped grazing land. The two flood control facilities were constructed by the U. S. Soil Conservation Service but have since been turned over to the Contra Costa County Flood Control and Nater Conservation District (Flood Control District) for operation and maintenance. The Flood Control District is the agency responsible for the maintenance and operation of the major flood control facilities and stream channels in East Contra Costa County. These facilities are intended to detain the peak runoff from a 100-year storm and prevent flooding in the downstream channels of both Deer Creek and Dry Creek. Both flood control facilities consist of an earthen dam with a piped outlet and an emergency spillway overflow. These are inspected annually by the Flood Control District, which also holds fee title to the land on which the structures are built and an overflow easement for the projected area covered by a 100-year event. The overflow easement contains restrictions on the development and uses which can occur within the area expected to pond runoff during a peak event. Within the proposed project the easement is planned to be used for open space and ;golf course uses. A regional drainage plan for the Marsh Creek watershed was updated by the Flood Control District in 1990 to determine the improvements needed for Marsh Creek and its tributaries in order to provide an appropriate level of flood protection in consideration of potential future development. The potential new development considered in the pian was based upon the existing general pians of the City of Brentwood and Contra Costa County. The improvements set forth in the plan include enlargement of the existing Deer Creek, reservoir west of the site, new detention basins on Deer and Dry Creeks downstream from the site, a new basin on Sand Creek, and enlargement of the Marsh Creek channel between Michael Paoli and Associates J-1 Dry Creek and Sand Creek. The plan established five new drainage areas, two of which are affected by the project (Areas 105 and 106). A fee of $0.17 per square fent of impervious surface created has been established to fund the regional improvements. An additional foe of $0.17 per square foot is collected by the City of Brentwood for subregional improvements. With the planned enlargement of the Deer Creek reservoir west of the project site in place, no more than about 22 cfs would flow out of the reservoir during a design storm" The existing,Dry Creek Reservoir on the project site is expected to completely contain a 100-year storm event. 2. PHOJECT MPACIS AND..MI11GATI?N MEASURES a. Impact Increased stvrmwater runoff ,from the project area Increased storm runoff from.the project area would result from the development of structures, roads, and parking areas which are impervious to water absorption. The southern portion of the Spanos site drains into the existing Dry Creek Reservoir, .which would have the capacity to handle the residential/golf course development (Kersevan, 1991). The southern portion of the Concord Avenue area would drain to Dry Creek downstream of the reservoir. A detention basin is planned for Dry Creek near its confluence with Marsh Creek. The design of the basin did not take into account urban development of this area. The northern portion of the Spanos site and the Concord Avenue area would drain into Deer Creek. The proposed golf course water features would be designed to pond runoff such that no additional flow would be discharged to; Deer 'Creek from the Spanos site. Runoff from the northern portion `cif the Concord Avenue area, however, would enter Deer Creek downstream of the golf course water features, A detention basin is planned for Deer Creek near its confluence with Marsh Creek. The design of the basin did not tape into account urban development of this area. r Mitigation Measures (1) Building pads and roadways shall be designed to drain toward the storm drain systems located in the streets. (2) Culverts shall be sized to accept the runoff incident from upstream properties in the Dry Creek basin and the release from the existing flood control facility upstream on the Deer Creek channel, taking into account planned development upstream. J-Z Michael Paoli and Associates k P. KL1rrCJ �}� E as�iJ f Y 1 ,r r 0 eU � . r � � � � l ' F ,t ;~(l, .�! � 0� F : E # F 4��ar 1✓ir d ' N ���� N r' �, rr��'/ � i� � r � �``� �ttl < is Y• � i x j i s } CD 4J �� LU SO •''' rr1f'j . a.+}}moi y r ..-f � \ ■ rY°!°1 a1 ri r► CL J f i' � .*n C" F. ...� ..�,�� ��.y ,t ,��+ ' �ti .� 9t � t j}�•i x�2 a T ittil ltTY , i � 4" lw ' +r j� z f i � �,.` :t >#�'� i s✓ }�� i i Y It , •� + �SS v r ' l s ti '►1\ s✓ r it! Y, "WO r + 1a Y Ir } 0 X m m Y� rr�jj t z I#; �{ ., r x � t11. .� i / : r`t .` `��';• (j7. � I •�.n 4 vr,,'�f G.f+` E E E l"Y i. � s" E�' r Y ,�4`,� �•,�� �, :r f " 8 0 U 4 4 (3) Labe features in the Seer Creek drainage area of the golf course shall be designed to provide on-site detention prior to release into the creek channel north of Balfour Road. (4) On-site detention for the Concord Avenue area and/or otter drainage improvements shall be provided as determined to be necessary by the Flood Control District and/or City to� insure that the design capacities of the regional drainage improvements are not exceeded. (5) No buildings, roadways, or other structures which might interfere with the flood control function of existing detention basins, as determined by the City and the Flood Control District, shall be located in the flood control easement or basin. (6) All grading within the flood plain of the Dry Creep basin shall not decrease the capacity of the reservoir. Leval of Significance The above mitigation measures will reduce the impact to a level of insignificance. b. Impact .Potential pollution of surface water by urban stormy runoff The Nationwide Urban Runoff Program and subsequent studies have indicated that urban runoff often contains pollutants such as heavy metals, organic compounds, coliform bacteria, oxygen-demandingsubstances, and total suspended solids. The amount of various pollutants varies as to hydrologic conditions, the volume, duration, and intensity of rainfall; and the land use and activities in the watershed. There is, however, no information available to date which allows for the quantification of potential pollutants resulting from the storm runoff of a particular development proposal. The Water Quality Act of 1987 amended the existing Federal Clean 'Nater Act and required the Environmental Protection Agency to promulgate a new set of regulations to control stormwater pollution from municipalities and industrial uses. 'These regulations established the National Pollution Discharge Elimination System (NPDES) permit requirements applicable to industrial uses, municipalities, and construction activities. Responsibilities for NPDES permitting were given to the State hater {duality Control Board and the various Regional Water Quality Control Boards. The proposed project would be most concerned with construction activity regulations and nonpoint source regulations. Construction activity NPDES Michael Paoli and Associates J-3 permits would be required for all construction activities which disturb greater than five acres of total land area, The Contra Costa County Flood Control and Fater Conservation District has indicated that specific requirements for dealing with nonpoint source discharge have not been developed for implementation by the County. The municipal requirements of the NPDES, which will address nonpoint sources, may be adopted in 1993 (Freitas, 1991). Because municipalities will ultimately be responsible for fines for noncompliance with stormwater discharge requirements, it is to the City of Brentwood's advantage to require that projects incorporate measures that will assure future compliance. Mitigation Measure The proposed project shall obtain an NPDES construction activity permit and shall comply with the specific requirements for nonpoint source discharge to be developed by the County and/or City in compliance with EPA and Regional 'mater Quality Control Board NPDES requirements. If nonpoint source discharge regulations are not developed by the time the project begins construction, the City of Brentwood shall require that control measures be designed into the project in accordance with the best management practices available at the time of development. The nonpoint source regulations may contain the types of control measures listed below. • Source controls that prevent pollutants from entering the stormwater. An example would include community participation programs for facilitating the proper disposal of waste oil, spent antifreeze, pesticides, waste solvents, and ether potentially harmful substances. • Hydraulic controls that alter the runoff hydrography to reduce peak flaw rates, pollutant concentrations, and overall pollutant loads to the receiving waters. • Treatment-based controls which would remove the pollutants after they have already entered the storm runoff. An example would. include detention basins that remove settleable pollutants by sedimentation processes and floating pollutants by surface skimming. Level of Significance The above mitigation measure will reduce the impact to a level of insignificance. J-4 Michael Paoli and Associates b x 3, a. Impact 3 Development of the general plan area in accordance with the cumulative development scenario may contribute to potential downstream flooding problems on Marsh Creek The regional drainage plan was designed to handle runoff from development in accordance with the Brentwood General Plan. As previously discussed, the proposed project will be designed so as not to contribute to downstream flooding. However, other properties in the cumulative development scenario not currently shown for urban development in the existing General Plan may impact downstream flooding on Marsh Creek or its tributaries. Mitigation Measures (1) The City and Flood Control District shall require that neve developments not accounted for in the design of the regional drainage plan improvements provide additional' cuff-site or on-site storm detention facilities such that the design capacity of the regional drainage plan improvements are not exceeded. (2) During the General Plan update process, the City shall work with they Flood Control District to ensure that the regional drainage plan is revised such that adequate drainage improvements are provided to accommodate planned'development. Level of Significance The above mitigation measures will reduce the impact to a level of insignificance. b. Impact Cumulative pollution of surface water by urban storm runoff from buildout of the Brentwood General plan area Full development of the General Plan area could result in a substantial amount of pollutants from urban runoff entering surface watercourses. Pursuant to the EPA regulations noted under project impacts, municipalities will have to develop requirements for dealing with nonpoint runoff pollution. NEchael Paoli and Associates J-5 Mitigation Measure All new development projects shall dimply with the specific requirements for nonpoint source discharge to be developed by the County and/or City in compliance with EPA regulations. (See mitigation measure under Project Impact b.) Level of Significance The above measure will reduce the impact to a level of insignificance. J_g Michael Paoli and Associates SECTION K WATER SUPPLY SETTING+ IMPACTS, AND MITIGATION MEASURES 1. SETIING The main source of domestic water in the City of Brentwood is groundwater. Most of the groundwater in the City is pumped from the two newest and deepest wells in the system, Wells No. 6 and No. 7, located in the northern part of the City. The City's maximum sustainable groundwater yield is estimated at between 2.7 and 5.4 million gallons per day (City of Brentwood Water Supply Study, 1990). In addition to groundwater, the City has received surplus water from the East Bay Municipal Utilities District (EBMUD) Mokelumne Aqueduct. Because Brentwood isnot in the EBMUD service area, the City can only receive surplus water, which cannot be relied on to meet future water needs. The contract between the City and EBMUD has expired and a new contract will need to be executed. The City has recently signed a water supply agreement with the Contra Costa Water District (CC's), which provides for the supply of potable water to the City water system from the Randall-Bold Treatment Plant currently being built by the CCWD. It is the City's intent at this time to continue to supply its citizens with groundwater from its wells and to add additional wells as required. However, the ability to draw water from the CCWD provides a reliable future supply of water in addition to groundwater. The agreement provides for no limitations on the amount of water to be supplied to the City. The City's storage system consists of a 2.5-million-gallon reservoir in the hills west of town, constructed in 1990. The distribution system consists of water mains, ranging from 4 to 36 inches in diameter, constructed in various street rights-of-way. A distribution system consisting of a grid of 24-inch diameter water mains is being constructed along major arterials as the City improves its infrastructure concurrent with residential and commercial development. The nearest water mains to the site are at Fairview and Dainty Avenues and at Minnesota Avenue and Balfour Road, approximately one mile east of the project site. Currently approved subdivisions have the responsibility to extend this water distribution system to the intersection of Fairview Avenue and Balfour Road, one-half mile east of the project site. The City's irrigation water need for agricultural activities has been served by the East Contra Costa Irrigation District (ECCID), whose facilities include a large Michael Paoli and Associates K-1 main canal at the southern boundary of the City, with branching laterals which extend northward and southward to distribute water throughout the area. These distribution laterals ,are currently open, concrete-lined ditches. The ECCID, however, has a policy of requiring undergrounding of these laterals into closed pipes when development occurs on adjacent land in order to protect the ECCID from liability for injuries which could occur around the open ditches. 2. PRO.1gCT IMPACTS AND MITI.QA'TION MEASU a. Impact Increased demand for water The average per capita water use for the City of Brentwood in 1990 was 200 gallons per day (Planning Center, 1991). This figure takes into consideration the commercial, industrial, and institutional uses needed to support the residential papulation. At 200 gallons per person per day, the proposed project, with a buildout population of 4,957, would use an average of 1.0 mgd and have a maximum daily demand of about 2.0 mgd. To adequately serve the project, a new, deep-water well will have to be developed within the City service area. Since most of the project site is above the service elevation of the existing, 2.5-mgd storage tank, additional, higher-level storage facilities will be needed to serve the project. There would be a need for two additional, higher-elevation storage reservoirs in order to adequately serve the site. Irrigation water will be used for the golf course and open space features. The estimated peak demand for irrigation water is approximately 1.2 mgd (Stedman, 1991). Irrigation water can be supplied directly from the East Contra Costa Irrigation District through a system of closed conduits which is being proposed by the district for construction along with the rest of the City's expanding infrastructure system. (The ECCID has already .entered into an agreement to supply irrigation water for a similar mixed-use project lying just east of the project site). Irrigation water would be stored in on-site ponds to be constructed as part of the golf course, and then pumped through a high-pressure irrigation system during the early morning hours, in order to avoid excessive peak water flow demands on the irrigation district distribution system. The use of irrigation water, as proposed, would require annexation of the project site to the irrigation district and negotiation of a supply agreement, in addition to the installation of a distribution conduit westerly on Balfour Road to replace the existing concrete ditch which now forms the eastern boundary of the Spanos site. The Applicant has entered into an agreement with ECCID for the use of irrigation water. Mitigation Measures (1) The Applicant has entered into a Capital Improvements Financing Program (CIFP 91-1), which will ensure that the following K-2 Michael Paoli and Associates 4 1 Y improvements will be made in order to provide the project site with an adequate water supply. t 0 Construction of two new water storage reservoirs at an elevation sufficient to serve the project area. • Construction of a booster pump station to pump water from the existing lower pressure zone to the higher tanks. Construction of a new, deep-water well within the City service area. • Extension of the 24-inch distribution main system in Balfour Road and extension of the system to the new storage tank locations. • Participation in connecting the water system to the Randall-Bold Treatment Plant. (2) Either the project site shall annex to the ECCID and the Applicant shall implement the agreement with the ECCID for use of surface water for the golf coarse and open space areas or City water shall be utilized. (3) A new distribution conduit shall be installed westerly on Balfour Road to replace the existing concrete ditch which now forms the eastern boundary of the Spanos site. (4) Water conservation measures such as drought resistant landscaping, drip irrigation, and low-flow water fixtures shall be designed into the project. Level of Significance The above mitigation measures will reduce this impact to a level of insignificance. 3. CUMIILA611YE IMPACTS AND M1119AIMS MEASURES a. Impact Increased demand for water due to cumulative development within the General Plan area Using the 1990 per capita water use figure for the City of Brentwood of 200 gallons per day, the cumulative development scenario population of 50,000 would result in an average water demand of 10 mgd. The City of Brentwood Water Supply Study estimated an ultimate water demand of 14 mgd in the Sphere of Influence over the next 30 years. The annual sustainable yield of the Nlichael Paoli and Associates K-3 City's current source of water, groundwater, was estimated at between 2.7 and .4 mgd (City of Brentwood Water Supply Study, 1994). The City's average daily 1994 water usage was 1.46 mgd and the maximum daily water demand, estimated at two times the average daily demand, was 2.92 mgd (Planning Center, 1991). The City of Brentwood Water Supply Study indicates that a supplemental water supply will be needed by about 1997. As previously noted, the City of Brentwood has entered into an agreement with the Contra. Costa Water District whereby the district will supply treated water to the City via the Randall-Bold Treatment Plant, which is expected to be fully operational in mid-1992. Water would initially be transported to Brentwood through those portions of the Oakley Water District system which are not currently used at full capacity. Additional pipeline facilities to Brentwood and future expansions of the water treatment plant will be necessary as demand for water increases in the service area. The City's agreement with CCWD will assure a reliable future supply of water for Brentwood. The agreement provides for no limitations on the amount of water to be supplied to the City. Mitigation Measure All new development shall participate in a Capital Improvement Financing Program to insure the development and financing of necessary water treatment, distribution, and storage facilities concurrent with the need for such facilities. Level of Significance The above mitigation measure would reduce this impact to a level of insignificance. b. Impact Increased operation and maintenance costs ,for public improvements resulting from new development, including the need for additional City employees to administer, operate, and maintain public improvements The proposed project and other new developments will generate substantial tax revenues to the City, a portion of which is used to hire additional employees and to operate and maintain public improvements. The revenues from new development may not cover the ultimate cost of these developments in terms of covering the cost of new employees and on-going operation and maintenance costs. i i ..y K``t Michael Pace and Associates l Mitigation Measure As part of the General Plan update process, the City shall conduct an analysis to determine whether public facility operation and maintenance costs resulting from new development, including new City employees, would not be covered by the revenue the City receives from new development. Based upon this analysis, the City shall consider establishing a fee structure to cover the costs. Level of Significance The above mitigation measure would reduce this impact to a level of insignificance. K-5 .Ybchael Paoli and Associates SECTION L WASTEWATER COLLECTION, TREATMENT, AND DISPOSAL SETTING, IMPACTS, AND MITIGATION MEASURES 1. SETTING a. Wastewater Treatment and Disposal The City of Brentwood's existing wastewater treatment plant is located on approximately 70 acres along the east side of Marsh Creek, north of Sunset Road in the northern portion of the City. The treatment processes utilized at the plant include initial pumping, screening, metering, oxidation ditch secondary treatment, secondary clarification, and effluent application to rapid infiltration ponds at the treatment plant site. Solids handling includes aerobic digestion, followed by sludge drying on unlined beds. Dried sludge is currently stockpiled on site, The existing treatment plant has a treatment and disposal capacity of 2.0 million gallons per day (mgd). The solids handling unit processes, including the aerobic digester and sludge drying beds, have capacities of 1.2 to 1.3 mgd, which is less than the plant capacity. However, the existing sludge holding pond, which will eventually be used for effluent disposal, can be utilized for sludge drying in the interim, until additional solids handling capacity can be constructed. This will provide for an interim solids handling capacity of 2.0 mgd. The wastewater disposal system is comprised of a series of nine rapid infiltration basins, surrounded on three sides by an interceptor drain and by Marsh Creek on the west side.. Rapid infiltration is the controlled application of wastewater to basins with permeable soils. Because of the layer of clay soils underneath the site at a depth of about 15-35 feet, groundwater mounds up below the rapid infiltration basins. This water flows laterally in all directions and is collected in the perforated interceptor drains. The groundwater captured from the drain system is discharged to Marsh Creek. The quality of the water found in the drain system has been excellent. b. Wastewater Collection The City's wastewater collection system consists of the original collection system constructed in the 1940s and the interceptor system constructed in 1990. These are interconnected to collect wastewater and deliver it to the treatment plant. Michael Paoli and Associates The interceptor system consists of 14- to 42-inch diameter pipes. The principal interceptor line follows Marsh geek from Balfour Road to the treatment plant. The size of the line increases from 30 inches at Balfour Road to 42 inches at the treatment plant. Feeder lines ranging in size from 10 to 24 inches deliver wastewater to the principal line. 'Wastewater flow generated west of Marsh Creek is collected by the interceptor system while flow generated east of Marsh Creek is primarily collected by the original system. 2, ITUIECT IMP-ACTS AND MITIGAIION MEASURES a. Impact Increased demand for wastewater collection, treatment, and disposal facilities The proposed project, using a figure of 300 gallons per person per day, will generate approximately 1.5 mgd of wastewater. (Three hundred gallons per day is the figure used in the City of Brentwood Wastewater Treatment Plant .Waster Plan .Report (1991) and accounts for the commercial, industrial, and institutional uses needed by the residential population). Current treatment plant capacity is 2.0 mgd and inflow to the treatment plant was estimated to be about 0.84 mgd (Nolte and Associates, 1991). There are about 3,400 housing units remaining to be built within approved residential projects (City of Brentwood, 1991), which, at a wastewater flow rate of 340 gallons per unit per day, would generate about 0.9 mgd of wastewater. When the 1.5 mgd from the project is added to the 0.9 mgd from the approved residential units and the 4.84 mgd existing inflow, the 2.0 mgd capacity of the plant would be exceeded by 1.24 mgd. The treatment plant is ultimately planned to be expanded to a capacity of 5 mgd in a series of 1 mgd increments. Such planned improvements would accommodate wastewater flows from the project. According to the City of Brentwood Ultimate Sanitary Master Plan (Dewante & Stowall, 1989), the project site would be served by two 18-inch sewer lines. The northern portion of the project site would be served by a trunk line extending south from San Jose Avenue which would reach Balfour Road just west of Concord Avenue. The southern portion of the project site would be served by a trunk line which would extend south approximately one-half mile from the intersection of Fairview Avenue and Balfour Road and then west to the project site. The planned collection system would have the capacity to accommodate wastewater flows from the project site (Vosicka, 1992). Mitigation Measure The project applicant has entered into a Capital Improvements Financing Program (CIFP 91.1) to provide for the development and financing of necessary 3 L-2 Michael Paoli and Associates Y 3 improvements to the wastewater collection, treatment, and disposal systems concurrent with the need for such facilities. Level of Significance The above mitigation measure will reduce this impact to a level of insignificance. 3, a. Impact Cumulative demand for wastewater collection, treatment, and disposal facilities Buildout of the cumulative development scenario will result in the development of a total of 16,452 dwelling units and a papulation of about 50,000. At a rate of 300 gallons per unit per day, the 16,452 dwelling units would generate 4.9 mgd of wastewater, far exceeding the existing 2.0 mgd capacity of the treatment plant. As noted above, however, the treatment plant is ultimately planned to be expanded to a capacity of 5 mgd in a series of I mgd increments. Such planned improvements would accommodate wastewater flows from the cumulative development scenario. The interceptor collection system has available capacities ranging from 4,6 mgd on the I$-inch line in Balfour Road to 17 mgd in the 42-inch line entering the treatment plant (Nolte and Associates, 1991). The capacity of the interceptor collection system, therefore, appears to be more than adequate to meet the ultimate buildout needs of the City. Mitigation Measure All new development shall be required to participate in a Capital Improvements Financing Program to provide for the development and financing of necessary improvements to the wastewater collection, treatment, and disposal systems concurrent with the need for such facilities. Level of Significance The above mitigation measure will reduce this impact to a level of insignificance. b. Impact Increased operation and maintenance casts for public improvements resulting ,from new development, including the need for additional City employees to administer, operate, and maintain public improvements Michael Paoli and Associates L,-3 The proposed project and other new developments will generate substantial tax revenues to the City, a portion of which is used to hire additional employees and to operate and maintain public improvements. The revenues from new development may not cover the ultimate cost of these developments in terms of covering the cast of new employees and ongoing operation and maintenance costs. Mitigation Measure } Y As part of the General Plan update process, the City shall conduct an analysis to determine whether public facility operation and maintenance costs resulting from 5 new development, including new City employees, would not be covered by the revenue the City receives from new development. biased upon this analysis, the City shall consider establishing a fee structure to cover the costs, a Level of Significance 1: The above mitigation measure would reduce this impact to a level of insignificance. s } } L_q Michael Paoli and Associates SECTION M s SOLID WASTE SETTINGI IMPACTS, AND MITIGATION MEASURES 1. . SLITINCA Brentwood Disposal Service, a private contractor, provides solid waste disposal services to the City of Brentwood and would be the agency providing solid waste collection services to the project site. Waste is disposed of in the Contra Costa Sanitary Landfill in Antioch. This is a Class III landfill which accepts only non- hazardous waste. In December 1990, the landfill reached its capacity and was ordered to close. Closure of the landfill was the subject of a lawsuit, and at present the landfill is under court order to remain open until March 31, 1992 (Zahn, 1991). Contra Costa County maintains waste disposal agreements with Alameda and Solano Counties. Waste from Brentwood, therefore, is expected to go to landfills in these counties once the Contra Costa Sanitary Landfill is closed. The County has approved permits for two new landfill sites, one in Marsh Canyon, the other in Keller Canyon, and is in the process of obtaining regional and state approvals for the landfills. Baring litigation, one of these landfill sites should open by the end of 1993 (Zahn, 1991). The City of Brentwood is currently preparing an Integrated Waste Management Plan as required by the Integrated Waste Management Act of 1989. The final pian should be completed in December 1991, at which time it will be sent to the Integrated Waste Management Board for approval. Cance the plan is approved, the project will be expected to comply with its provisions. The goal of the plan is to reduce the City's solid waste production by 25 percent by 1995, and by 50 percent by the year 2000 (Brennan, 1991). 2. a, Impact Increased demand for solid waste disposal service Solid waste generation factors for Contra Costa County are shown on Table M-1, Using these waste generation factors, the project's 4,957 residents, 368 retail commercial employees, and 1,088 light industrial/business park employees would generate 38,066 pounds of solid waste per day, or approximately 19 terns per day. The school, park, and golf course will generate solid waste as well, but no precise generation figures are available from Contra Costa County (Zahn, 1991). The waste generation figures given here do not take Michael Paoli and Associates M-1 f into account the reduced production.of waste that may occur as a result of the implementation of Brentwood's Integrated Waste /Management Plan. TABU M-1 w, SOLID WASTE GENERATION FACTORS FOR CONTRA COSTA COUNTY Source Amount of Solid Waste ; Residential/Connanercial 3.9 lbs r 22rson Mr da Construction/Demolition 1.0 lbs r rson er da Industrial 15.9 lbs per manufacturing and wholesale ern to ee Source. Planning Center, 1991 .. i The project will ,generate approximately 6,947 tons of solid waste per year. This represents 0.69 percent, of the solid waste currently generated by Contra Costa. County each. year, 1 million tons. The proposed landfill in Marsh Canyon is located west of Byron. Approximately 300 acres of the 1,000-acre site are planned for use as a landfill, with a capacity ` of 73 million tons of solid waste. At Contra Costa County's present rate of disposal, the approximate life span of the landfill is 73 years. The proposed landfill in Keller Canyons is located south of Pittsburg. Approximately 3€0 of the proposed site's 1,550 acres are planned for use as a landfill. The capacity of , the landfill will be 30 million tons. At the County's current rate of disposal, the landfill will remain open for 30 years (Planning Center, 1991). Mitigation Measures i (1) The project shall comply with all measures adopted by the City pursuant , to the Integrated Waste Management Act of 1989. ti (2) The City's curbside recycling program shall be implemented in the project area. (3) The Marsh Canyon and/or Keller Canyon landfill sites should be approved and made operational. Level of Significance The above mitigation measures will reduce this impact to a level of insignificance. M-2 Michael Paoli and associates -1 b b. Impact Increased demand for solid wash collection services Solid waste collection services will be provided to the project by Brentwood Disposal Service under its contract with the City of Brentwood. The service would be required to expand its capabilities as necessary to accommodate the collection requirements of the project. The expansion would be funded by monthly, per'-unit charges. Mitigation Measure No mitigation measured is required. Level of Significance This impact is not considered significant. c. Impact Generation of household hazardous waste Residential households typically use a number of potentially hazardous products such as motor oil, pesticide, and various cleaners and chemicals. These „household hazardous wastes" have historically been discarded in the regular trash or in backyards, sewers, or storm drain systems. These disposal methods have the potential to pollute soil, surface water, and groundwater. Mitigation Measure The City shall provide either a household hazardous waste collection center or periodic waste collection events. Level of Significance The above mitigation measure will reduce this impact to a level of insignificance. 3» a, Impact Cumulative increase in demand for solid waste disposal service and increased generation of household hazardous wastes The buildout population of the cumulative development scenario, at 50,012, would generate approximately 97.5 tons per day of solid waste, not including Michael Paoli and Associates M-3 commercial, institutional, or industrial waste generation. Substantial amounts of household hazardous waste would also be generated. Mitigation Measures (1) The City shall enforce compliance with all measures of the Integrated Waste Management Act of 1989. (2) The City's curbside recycling program shall be implemented in ,new development areas. (3) The City shall provide household hazardous waste collection centers in convenient locations and offer periodic waste collection events. (4) The Marsh Canyon and/or Feller Canyon landfill sites should be approved and made operational. Level of Significance The above mitigation measures will reduce this impact to a level of insignificance. L i D i 4 r Y M-4 Michael Paoli and Associates ! x w SECTION N HAZARDOUS CONDITIONS SETTINGIMPACTS, AND MITIGATION MEASURES 1 . i.tTTJ I'E 3F a. Spanos Site The potential for hazardous conditions on the Spanos site related to the presence of high voltage electric transmission lines and underground pipelines carrying natural gas and petroleum is addressed in the following subsections. Also addressed are the results of an investigation of the potential for surface and subsurface contamination on the site. Potentially hazardous conditions related to the historical coal mining operations on the site are addressed in Section E., "Topography, Geology, Soils; and. Seismic Hazards. (1) Electric Transmission Lines Two sets of 230 kV electric transmission lines are strung on one set of towers across the western portion of the Spanos site (see Figure C-0. Owned by Pacific Gas and Electric Company (PG&E), this set of transmission towers is protected by an easement 2035 feet in width. Electric current, whether running through high-voltage transmission lines or home appliances, generates electric and magnetic fields. The strength of these fields is reduced as one moves away from their source. In addition, electric fields may be blocked by objects such as trees or buildings, but magnetic fields generally may not be blocked. The term "electromagnetic fields", or EMF's, is used to describe these electric and magnetic fields (Leonard, et al, 1990). The impact of an electromagnetic field depends on the frequency at which the field oscillates. High-frequency electromagnetic energy fields such as X-rays and microwaves have enough energy to break up molecules and heat body tissue. The ENfFs generated by power lines and electric appliances are considered low- frequency fields. They do not have enough energy to break chemical bonds or heat tissue. Laboratory studies have shown, however, that these relatively weals EMFs can induce changes in the functioning of living systems. They can alter the functioning of individual nerve cells and the nervous systems of non-human animals and change the levels of specific chemicals the body makes. Laboratory studies have not yet shown whether these types of changes can lead to any increase in risk to human health (Leonard, et al, 1990). Michael Paoli and Associates N-1 Some epiderniologic studies, however, have shown a connection between human health and low-frequency electromagnetic fields. A 1979 Denver study linking childhood leukemia to nearby heavy-duty electric distribution lines was the first to connect low-frequency ENTs to cancer. The results of this study have been questioned because of possible problems with its design. Several studies have now been performed in an attempt to verify the results of the first, but their conclusions have been mixed (Leonard, et al, 1990). Research continues, including a newly commissioned study by the California Public Utilities Commission'(California PUC, 1991). At this time, the body of scientific knowledge available on the subject does not offer any reliable conclusions.as to the effect of low-frequency electromagnetic fields on humans. Several states have set limits on the extent of energy fields that can be generated by electric transmission equipment. The State of California does not regulate these energy fields. However, the California Department of Education, after consultation with utility companies, the State Department of Health Services, and the Electric Power Research Institute, wrote into its 1989 School Site Selection and Approval Guide a set of distances from which schools should be located from electric lines. School sites must be at least 100 feet from the edge of a 100-115 kV power line easement, 150 feet from a 220-230 kV easement, and 250 feet from a 345 kV easement. At the present time, quantifiable impacts on human health from long-term, low- level electromagnetic and radio frequency field exposure have not been proved. It has not even been determined which forms of electromagnetic energy might cause human health impacts, and how they might be prevented by distance or shielding. For instance, some laboratory experiments have shown that health is affected by pulsed (intermittent) exposures to low-level EMFs; others, that health is affected by continuous exposure to such fields. Also there appears to be a complex relationship between dose level and health effects. Some biological effects appear at field strengths of certain levels, disappear when field strength is increased, then reappear at still higher levels. Varying the frequency (speed of alternation) of the fields produces similar "effect windows". (Leonard, et al, 1990). These complexities make it difficult to determine what aspects of electromagnetic fields might affect human health. Until such agencies as the Environmental Protection Agency, the Public Utilities Commission, and the California Department of Health Services set exposure limits to protect land uses against various types of electromagnetic radiation, a policy of "prudent avoidance" of the possible hazards of exposure to low- frequency electromagnetic fields should be followed (Leonard, et al, 1990). (2) Natural Gas and Petroleum Pipelines Three natural gas lines and one petroleum pipeline pass underground through the Spanos site (see Figure C-1). Chevron Oil Company owns and operates a high- , N-2 Michael Paoli. and Associates y pressure, 18-inch petroleum pipeline that passes through the site from northwest to southeast, The petroleum pipeline shares a 30-foot easement with a 26-inch natural gas line operated by PG&E and Stanpac. The two other natural gas lines, one 24 inches and the ether 36 inches in diameter, are owned and operated by PG&E. They are contained in a 100-foot-wide easement that passes through the eastern portion of the Spanos site. The two easements merge in the east-central portion of the site and continue to the southeast comer of the site. The pipelines are covered by approximately 50 inches of soil (Simpson, 1991). The pipelines are protected by easements on which no structures except roads should be built (Berry, 1991). The pipelines are inspected regularly and none has any record of leakage or rupture. In addition, the pipelines are cathodicaliy protected; that is, an electrical current runs through the pipe. Cathodic protection makes the detection of leaks automatic and rapid. It is possible that as an additional treasure to protect public safety, the pressure with which petroleum passes through the Chevron pipeline may be lessened once residential units are built nearby (Billow, 1991). (3) Assessment of Potential for Surface and Subsurface Contamination A Level One Site Assessment of the Spanos site was performed by ENGEO, Inc. in June 1989. The assessment included a walkover survey, a review of aerial photographs, and a records search of information related to past and present land use on the Spanos site. The purpose of the assessment was to determine whether past or present land uses on or near the Spanos site could have resulted in surface or subsurface contamination of the site. The walkover survey revealed no visible surficial staining, suspicious seeps, or areas of stressed vegetation which might have indicated contamination. The site was also inspected for any fill/ventilation pipes, ground subsidence, or other evidence of existing or preexisting underground storage tanks. No such evidence was found. Near the old coal mining facilities in the southeast portion of the site, the walkover survey revealed several mounds. These mounds were whitish in color and appeared eroded. They may be old tailings piles created daring mining operations. The whitish calor may indicate sulfur deposits, the result of de-watering of underground structures during mining operations. It is unlikely that after more than 100 years of exposure to wind and rain a substantial amount of sulfur could remain. However, it is possible that soils around these deposits may be acetic. Such soils would not pose a significant health risk, although vegetation growing on such soils may be adversely affected (ENGEO, 1989). A homesite is located in the central portion of the Spanos site. The former owner of the homesite was contacted for information regarding previous use of the site and possible sources of contamination. He indicated that no fuel or chemicals were ever used at the site, but that an old refuse dump (pre-1941) was located to the east on the present site of the Brentwood Rod and Gun Club. Nlichael Paoli and Associates N-3 Brentwood Disposal Service was contacted to confirm the location of this refuse site, but had no information regarding it. The former owner had no recollection of refuse being dumped on the Spanos site itself(ENGEO, 1989). A search of available records was conducted through contact with the fallowing entities. • Brentwood Planning and Building Inspection Department • Brentwood Historical Society • Brentwood City Library • East Diablo Fire District • Contra Costa County Community Development Department • Contra Costa County Department of Environmental Health • East Contra Costa Agricultural Commissioner's Office • Chevron Pipeline Company • Pacific Gas and Electric • State Department of Oil and Gas • State Department of Health Services, Toxic Substances Control Division, North Coast Region • California Regional Water Quality Control Board, San Francisco and Central Valley Regions • U. S. Environmental Protection Agency Contact with these agencies included records searches of the following lists: State Department of Health Services: • Expenditure Plan for the Hazardous Substance Cleanup Bond Act of 1984 (Revised 1989) • Abandoned Site Program Information System List (ASPIS) • Cortese List (AB 3750) Regional Nater Quality Control Board (RWQCB): • R'WQCB Fuel Leaks List • North Bay Toxics List • Central V'alley'RWQCB Tank Tracking System • Beneficial Use Assessment Report U. S. Environmental Protection Agency: • National Priorities List (NPL) • Resource Conservation and Recovery Act (RCRA) • Comprehensive Environmental Response, Compensation and Liability .Act (C,'ERCLIS) N-4 Nuchal Paoli and Associates # 4 Y, Y Neither the agencies contacted northe lists consulted revealed the presence of contamination on the Spanos site. A review of aerial photographs was performed in order to assess historical use of the Spanos site and land in its vicinity and to identify possible sources of contamination. Historical use appears to have been limited to the coal mining operations (late-1870s) and a homesite with associated limited livestock production (pre-1939 through the 1970s). Neither of these uses are likely to have contaminated the site. No use of the adjacent land was observed prior to 1957. Limited agricultural use began in the 1960s and intensified in the 1970s. These agricultural uses are not likely to have contaminated the site. Contact with PG&E and Chevron regarding their natural gas and petroleum pipelines revealed no record of any leaks throughout the history of the pipelines. No evidence of leaks was found during the walkover survey. It is unlikely that historical .use of the Spanos site or land in its vicinity resulted in contamination of the site (ENGEG, 1989). b. Concord Avenue Area A Level One Site Assessment was performed on the Sciabica property, an approximately 58-acre portion of the Concord Avenue area, in March 1990. The assessment of the Sciabica property included the same activities as those performed on the Spanos site. In addition, several soil samples were taken and analyzed to determine whether agricultural use of the area had contaminated the site. A walkover of the site revealed no evidence of contamination. A search of available records was conducted through contact with the following entities: • Contra Costa County Riverview Fire Department • Contra Costa County Community Development Department • Contra Costa County Department of Environmental Health • East Contra Costa Agricultural Commissioner's Office • State Department of Health Services, 'Toxic Substances Control Division, North Coast Region • California Regional Water Quality Control Board, San Francisco and Central "Valley Regions • U. S. Environmental Protection Agency • Financial Title Company Michael Paoli and Associates N-5 Contact with these agencies included records searches of the following lists. State Department of Health Services. • Expenditure Plan for the Hazardous Substance Cleanup Bond Act of 1984 (Revised 1989) ` • Abandoned Site Program information System List (ASPIS) • Cortese List (AB 3750) Regional Water Quality Control Board (RWQCB): • RWQCB Fuel Leaks List • Forth Bay Toxics List • RWQCB Report on Releases of Hazardous Substances from Underground Tanks • Solid Waste Assessment Test (SWAT) Program List U. S. Environmental Protection Agency: • rational Priorities List (NPL) • Resource Conservation and Recovery Act (RCR.A) = Comprehensive Environmental Response, Compensation and Liability Act (CIRCLIS) Neither the agencies contacted nor the lists consulted revealed the presence of contamination on the site (ENGE4, 1990). The old landfill site located on what is now the Brentwood Rod and Gun Club (located to the east of the project site) was listed on the SWAT List as Brentwood (rank 8). The SWAT Dist ranks solid waste sites from I through 15 according to their priority. The lower the number, the higher priority and the earlier the site will be reviewed. The Waste Discharge to Land Division was contacted and no work has been done on this site. Proposals for investigations of rank-8 sites are due at the RWQCB by January 1993, with work to be completed by July 1994. Although the old landfill site would not be expected to have adversely affected site surface or near-surface soils, there is a remote possibility that local groundwater may have been affected. . No further information on this site is available at this time (ENGEC}, 1990). Aerial photography revealed that the 58-acre area has been in continuous agricultural use since at least 1939, first in row crops, and more recently in orchard crops. Sail sampling and analysis were undertaken to discover whether agricultural use has resulted in contamination of the area (ENGEM), 1990). r Two sets of six samples each were taken of Concord Avenue area soils. The first set was taken at a depth of 3 to 9 inches, the second on the same spot at a depth N-6 Michael Paoli and Associates of 30 to 36 inches. At shallow depths, toxaphene, an organochlorine pesticide, was detected in four of the six samples taken. Concentrations of toxaphene in the deeper soil samples were not found. Additional surface soil sampling and laboratory testing was conducted in September 1990 to further define the concentrations of toxaphene in the area and to assess the potential, health risks. Low levels of toxaphene were again detected in the near-surface soils (F'NGEO, 1990)• The State Department of Health Service presently maintains hazardous waste criteria for toxaphene. The Soluble Threshold Limit Concentration (STLC) and Total Threshold Limit Concentration (TTLC) for toxaphene are 0.5 parts per million (ppm) and 5.0 ppm, respectively. Concentrations at or above the TTLC would classify a soil as hazardous. Concentrations at or exceeding the STLC, but less than the TTLC, would be classified as "designated waste" (ENCEO, 1990). Concentrations of toxaphene in the eastern portion of the area tested ranged from 0.047 ppm to 0.83 ppm. This area is proposed to be developed as a planned employment center. Concentrations in the western portion of the area tested, which is proposed For cluster and single family residential development, neighborhood commercial development, and park use, ranged from 0.35 ppm to 0.440 ppm. Concentrations of toxaphene tended to be higher in the eastern portion of the site, but only the 0.83 ppm reading exceeded the STLC out of the 20 soil samples taken. The levels of toxaphene present were determined to be a potential health risk to future residents if not removed or covered with clean, engineered fill (ENGEO, 1990). 2. PROJECT IMEACIS ANDMITIGATION. MEASURES a. Impact Exposure of project residents to low frequency electromagnetic radiation from the 230 kV transmission lines The project will place residences in proximity to the 230 kV electric transmission lines. This may result in the exposure of residents to low-frequency electromagnetic fields. All or portions of approximately 75 lots will be within 150 feet of the transmission line easements, and about 50 percent of these lots will adjoin the easement. Mitigation Measures (1) The Applicant shall obtain information From PG&E on the calculated strength of the electromagnetic Fields generated by the transmission lines. Field strengths shall be identified at the edges of the easement and calculated to a distance at which they are no longer detectable. The Applicant, in conjunction with a qualified consultant, PG&E, and the City Michael Paoli and Associates N-7 shall develop public informational material on the potential health effects of electromagnetic fields and provide this information to all purchasers of property within which there is a detectable amount of electromagnetic radiation originating from the transmission lines. Such information shall be provided prior to property purchase in the real estate reports for the property. (2) Conspicuously posted signs shall be provided at the edge of the transmission line easement informing the public of the presence of high- voltage transmission tines. Level of Significance At the present time there is an absence of conclusive information on whether exposure to electromagnetic fields poses a health risk. In the absence of such conclusive information, the intent of the above mitigation measures is to serve a public disclosure function. b. Impact Exposure of adjoining property to low-frequency electromagnetic radiation from the 230 kV transmission lines The project plans call for realigning the electric transmission lines in the northwestern portion of the project site. Three towers will be relocated to the western border of the project site. The Applicant will bear the cost of moving the towers and PE will do the work. Since the land to the west of the site is not designated for development in the existing General Plan, realignment to the western border of the site will not expose any habitable structures to electromagnetic radiation. However,. the site has been proposed for development as part of the General Plan update. The effects of low-frequency electromagnetic radiation would, therefore, become a consideration in planning any urban development for the property to the'west. Mitigation Measure (1) Any future development on the adjoining property shall be subject to the mitigation measures set forth for Impact a for the proposed project. Level of Significance The level of significance would be the same as described for Impact a. t N-8 Michael Paoli and Associates . 9 Y Q C. Impact Potential for unsafe conditions related to the 230 kV electric transmission lines and towers (1) Potential unsafe conditions would involve such items as structures or.trees or other objects corning into contact with the lines or towers, the lines being too close to the ground, or the lack of maintenance access to the lines and towers. Mitigation Measures Mitigation measures (1)-(9) are based primarily upon the restrictions outlined in Rules for Overhead Electric line Construction, General Order No. 95 of the Public Utilities Commission: (1) A minimum vertical.clearance of 30 feet shall be maintained between conductors and final grade. (2) No grading shall be allowed which would create standing water in the power line easement. (3) No structures or overhangs shall be allowed in the easement. (4) Any landscaping and lighting standards in the easement shall not exceed a height of 15 feet at maturity. (5) The drip line of all trees shall be at least six feet from all power line structures. (6) Maintenance access for large vehicles shall be provided through the easement consisting of a 25-foot clearance around each tower and asphalt pavement to support a 100,000-pound, three-axle vehicle. (7) Highway-type barrier protection shall be placed around tower footings. (8) The towers shall either be fenced off or.have anti-climbing protection provided to prevent persons from climbing the towers. (9) Relocation of the power lines over existing oak trees on the site shall be accomplished in a manner such that appropriate clearance over the trees is maintained to prevent any need to remove the trees. Michael Paoli and Associates N-9 Levet of Significance The above mitigation measures will reduce this impact to a level of insignificance. d. Impact Exposure of future residents to natural ,gas or petroleum pipeline leakage or rupture The project will place residences near petroleum and natural gas pipeline easements. Since no structures are allowed to be built in the pipeline easements, the pipelines are proposed to be rerouted under streets and the golf course, except for one portion of the project site where the PG&E/Stnpac and Chevron pipelines are proposed to be split and run along the side lot lines of 27 residential lots. In some cases, the lines will run along bath sides of individual lots. The developer will gear the cost of moving the pipes, and PG&E and Chevron will perform the work. The potential for possible leakage or rapture of the lines is considered minimal by PG&E and Chevron (EN EO, 1989), The lines are cathodically protected:, which makes the detection of leaks automatic and rapid. The lines are regularly inspected and none has any record of leakage or rupture on the project site (ENGEO, 1989). However, running the lines down side lot lines in the northwest portion of the site and under street rights-of-way in residential areas would place residents close to any accidental leak or rupture and would make access to the lines for maintenance and leaf detection more difficult than if the lines were in an open space area. Mitigation Measures (1) Reroute the PG&E/Stanpac and Chevron pipelines so that they do not pass under any residential lets or under street rights-of-way in residential areas. (Crossing streets in the golf course or open space areas is acceptable.) (2) The Applicant shall inform all lot purchasers in the project site as to the location, nature, and potential hazards of the pipelines traversing the site. Level of Significance The above mitigation measures will reduce the impact to a level of insignificance. e. Impact , Exposure of future residents to pesticide residues (toxaphene) or ` other toxic substances N-10 Michael Paoli and Associates � i The low levels of toxaphene detected in the surface soil of the proposed residential and parr areas (Sciabica property) may present a health risk to future residents and park users through contact with the soil over time. Although the toxaphene levels were higher within the area proposed for.commercial development, this does not present a health concern since there is less soil exposure within a commercial development as compared to residential or parr site development (ENGEM, 1990). The Spanos site and 58 acres of the Concord Avenue area were the subject of Level I Site Assessments. The remaining portion of the Concord Avenue area has not been subject to a Level I Site Assessment. Such an assessment shall be completed prior to development of this portion of the Concord Avenue area in order to ensure that there are no toxic substances on the site which could potentially affect future residents. Mitigation Measures (1) A minimum of two feet of clean engineered fill shall be used on the portions of the Sciabica property proposed for residential and park site development. (2) The portion of the Concord Avenue area which has not been the subject of a Leven Site Assessment shall have one prepared prior to any development occurring in this area. Level of Significance The above mitigation measures will reduce the impact to a level of insignificance. 3. No cumulative impacts are anticipated related to hazardous conditions. Michael Paoli and Associates N-11 a SECTION O LAW ENFORCEMENT SETTING" IMPACTS, AND MITIGATION MEASURES 1 . SETTIha Law enforcement services will be provided for the project site and vicinity by., .. the City of Brentwood Police Department. Patrol headquarters for the Police Department is located at 500 Chestnut Strut, approximately two and one-half miles from the project site. Currently, the Police Department has 14 sworn personnel, including the Chief of Police. Coverage of the City is provided 24 hours a day. The number of officers on patrol depends upon the time of day and the day of the week (Frank, 1991). Although the Brentwood Police Department has no formally adopted response standards, their unofficial goal is to maintain a response time of 3 minutes for emergency situations and 30 minutes for routine matters. The current ratio of police officers to the general population is approximately one officer per 500 persons. The Department expects this ratio to increase toward one officer per 1,000 persons due, in part, to improvements in technology and economies of scale, as well as to the projected growth of the Brentwood population (Planning Center, 1991). The Brentwood Police Department plans to add about 1,200 additional square feet to its headquarters in order to handle departmental growth. The Department has also identified the need for a new facility to serve the population projected by the Brentwood General Plan, This new facility, approximately 8,000 square feet in size, would replace the old station and allow the Police Department to serve Brentwood as the City approaches buildout ('Planning Center, 1991). 2. a. Impact Increased demand for law enforcement services The Brentwood Police Department will need to hire additional personnel in order to provide adequate service to the project. The project will require the equivalent of one officer around the clock (a total of six officers), one additional supervisor, one-half of an investigator, and one-half of a field service officer. Additional requirements will include two patrol cars, one investigative vehicle, and one field service officer truck/sedan, belated equipment and office space for new personnel will also be necessary (Frank, 1991). Michael Paoli and Associates 4-1 Mitigation Measures (1) The City of Brentwood is responsible for providing the necessary personnel and equipment to adequately serve the proposed project. The Police Department anticipates that increased revenues- from new development will be able to fund the necessary personnel and equipment. (2) The Police Department shall review the design of the proposed project from the standpoint of crime prevention. The recommendations of the Police Department shall be made a condition of tentative maps. Lever of Significance The above mitigation measures will reduce the impact to a level of insignificance. 3. a. Impact Increasers demand for law enforcement services due to cumulative development Pull development of the Brentwood General Plan area in accordance with the cumulative development scenario would result in a population of 50,012. At the projected ratio of one officer per 1,000 persons, and including the 14 existing officers, an additional 36 officers would be needed. Substantial additional equipment and office space would also be necessary to accommodate this number of employees. Mitigation Measures (1) The City of Brentwood is responsible for providing the necessary personnel and equipment to adequately serve the cumulative impacts of development. The Police Department anticipates that increased revenues from new development will be able to fund the necessary personnel and equipment. (2) The Police Department shall continue to review the design of proposed new developments from the standpoint of crime prevention. The recommendations of the Police Department shall be made conditions of development approval. Level of Significance The above mitigation measures will reduce the impact to a level of insignificance. 0-2 Nfichacl Paoli and Associates � h r SECTIO' P FIRE PROTECTION AND EMERGENCY NCY ERVICES SETTING,ING, IMPACT'S, AND MITIGATION MEASURES 1. SE11ING Fire protection for the project site is provided by the East Diablo Fire Protection District (EDFPD). At present, the District has four stations. The station currently serving the project area is located at the corner of Walnut Boulevard and Dainty Avenue in Brentwood, approximately 21/2 miles from the project site. The Walnut Boulevard station is equipped with two engines and one power wagon. It is staffed with volunteers who are paid each time they respond to a call for service. Volunteers are qualified Firefighter level one (FF 1) and many are Emergency Medical Technicians (EMTs). The goal of the District is to provide a 3-minute response time between dispatch and arrival to' 90 percent of emergency calls within the City limits. Because the project site is located outside current City limits, and because the Walnut Boulevard station is staffed only with on-call volunteers, response time to the project site cannot now meet these goals. EDFPD has made the construction and staffing of a new fire station a requirement for the Brentwood Lakes development located east of the proposed project, across Concord Avenue. The developer of Brentwood Lakes has set aside one acre of land on Fairview Avenue, approximately one-half mile south of Balfour Road, for the use of the District. The District requires that the .Fairview Avenue station be operational before any new development can be completed in the area south and west of current City limits. Construction of the new station will begin when Brentwood Lakes begins construction, probably before 1994. Once the new station begins operations, it is anticipated that response time to the project site will meet the 3-minute goal. In addition to receiving funding from Contra Costa County and the "tate of California, the EDFPD also receives funds from a benefit assessment district and City of Brentwood developer fees. The assessment district, which covers the entire EDFPD, was established to provide funding for fire personnel costs. Each residence in the assessment district pays a monthly assessment of $14.50, The City developer fees are intended to cover the cast of constructing new fine facilities, The fees are $375 for single family homes, $280 per multiple family unit, and $0.10 per square foot for commercial structures. The District maintains mutual aid agreements with the other fire protection districts in Contra Costa County. Michael Paoli and Associates P-1 Dispatch of emergency medical services for the Brentwood area comes from the central dispatch office of the Antioch Police Department in Antioch. A 911 call which originates in Brentwood is received at central dispatch and relayed to the Regional Ambulance Company, a private provider of paramedic services. There is one ambulance stationed in Brentwood available to answer emeigency calls. The ambulance is an advanced life support unit staffed with paramedics. 'It is currently sttioned at the corner of Lone Tree Way and Highway 4, approximately 5 miles from the project site. The goal of Regional Ambulance Company is a response time within 10 minutes (Bolt, 1991). 2. PROJECT INEACTS AND -MITIGAITON MEASURES a. Impact Increased demand for fire protection and emergency services The District has currently reached its capacity for response. However, once the District has constructed and staffed a new station on Fairview Avenue, south of Balfour Road, the project could be adequately served. Construction of the new station is anticipated to begin sometime before 1994,. depending upon the pace of construction of the Brentwood Lakes development (Hine, 1991). The Fairview Avenue fire station will be funded through the Capital Improvement Financing Program. Regional. Ambulance Company indicated that their ability to handle emergency calls in the Brentwood area will not be impacted by the project. They currently operate far below their capacity to provide service clue to the limited present-day population of Brentwood (Bolt, 1991). Mitigation Measures (1) If the new station planned for Fairview Avenue, south of Balfour Road, is not constructed prior to the construction of the project, the Applicant shall provide appropriate fire protection facilities on the project site as determined by the East Diablo Fire Protection District. The Fairview Avenue fire station will be funded through the Capital Improvement Financing Program. (2) The project will contribute developer fees and benefit assessment taxes toward the funding of fire protection services in accordance with existing requirements. a 41 P-2 Michael Paoli and Associates t c Level of Significance The above mitigation measures will reduce the impact to a level of insignificance. b. Impact Potential fo_r inadequate project water ,flaw for fire .protection 'In order to provide adequate fire fighting capabilities on the project site, the .District requires that commercial and multiple family residential zones be equipped with fire hydrants and water lines capable of generating 3,000 gallons per minute with not more than 3 hydrants in use at one time. The standards for residential areas require 1,000 gallons per minute from no more than 2 hydrants at one time. Mitigation Measure The above fire flow standards would be typically required by the Bast Diablo Fire Protection District and the City of Brentwood. Level of Significance This impact is not considered to be potentially significant as long as the mitigation measures in Section K, which would provide for two higher-elevation water storage reservoirs to serve the project area, are implemented. 3. a. Impact Increased demand for fire protection and emergency services due to cumulative development in the Brentwood General Plan area There are currently deficiencies in the ability of the District to provide services, including the lack of full-time, professional personnel and the existence of areas which have substandard water flows for firefighting. The ultimate growth of the City of Brentwood to a city of 50,000 people would worsen these deficiencies. The District is in the final stages of developing a master plan to determine future needs in consideration of anticipated development in the District. Regional Ambulance Company periodically reviews the placement of ambulances within its service area. Brentwood's growth patterns may influence the company to relocate their advanced life support unit from its current station at Lane Tree Way and Highway 4. Buildout of the Brentwood General Plan may require the company to place more ambulances in the Brentwood area. The Regional Ntchael Paoli and Associates P-3 Ambulance Company indicated it would have no difficulty serving Brentwood's growing population (Bolt, 1991). Mitigation Measures (1) Future development in the City of Brentwood shall be subject to, the provisions and standards of the EDFPD Master Plan, (2) New development shall continue to contribute developer fees and benefit assessment taxes toward the funding of fire protections services. Level of Significance The above mitigation measures will reduce this impact to a level of insignificance. F t P i P-4 Mzchael Paoli and Associates � x ti Y SECTN SCHOOLS SETTINGS IMPACTS, AND MITIGATION MEASURES t 1Ft r��+r!yyyV.=T� I. SETT�� .irrL. The project site is located within the Brentwood Union School District Grades K-8) and the Liberty Union High School District (grades 9-12). Brentwood Union School District draws no attendance area boundary lines to determine which school students from a given area trust attend. Children may attend the school of their parents' choice, as long as the school's capacity is not exceeded, Consequently, students from the project area in grades l£-5 would attend one of three elementary schools: Ron Dunn, Garin, or Brentwood Elementary, The closest of these is Ron Nunn Elementary School, located at the corner of Dainty and Fairview Avenues. This facility opened at the beginning of the 1991-1992 school year and operates on a year-round schedule. The other two elementary schools adhere to a traditional schedule. Students from the project area in grades 6-8 would choose between two middle schools, Edna Hill Middle School, or a new school to be located on Minnesota Avenue, north of Dainty Avenue. The second school is anticipated to open in 1993. A new middle school site is planned as part of the Hancock property to the north of the project site. High school students would attend Liberty Union High School or a new high school planned for the northeast corner of Neroly Road and O Hara Avenue. The second high school is planned to open in 1996 or 1997. Elementary school students generated by the project will need to be served by a new school within project boundaries, according to the Brentwood Union School District. The Applicant has agreed to include a school site of 10-net acres, the size proposed by the Brentwood Union School District. Construction of the school will be funded through an agreement between the Brentwood Union School District, the City, the Building Industry Association, and homebuilders in the Brentwood area. The agreement provides for payment by homebuilders of between $4,808.00 and $5,288.80 per single family residence and between $2,404.00 and $2,644.40 per multiple family residential unit. The fee covers the cast of school buildings, land, improvements, Brentwood Union School District support facilities and structures, capital equipment, furniture, and school buses. The fee is assessed when building permits are approved. Ntchael Paoli and Associates Q4 The proposed project was included" in Liberty Union High School District's calculations of the need for a second high school. The High School District has purchased land for the second school in the Oakley area. The High School District collects developer fees from new facilities in the amount of $1.55 per square foot. Because the fee is shared with the four elementary school districts that send students to Liberty Union High School District, the High Schaal District receives approximately 30 percent of the total amount collected. The fee does not provide -sufficient funds to -the High School District for construction and services at the new facility. At this time, additionalfunds from the State of California have been requested, but due to the current•budgetary shortfall, the state will probably be unable to provide additional funds. Therefore, the High School District plans to establish a Community Facilities District to fund the construction of new high. schools. At this time, the High School District is working with the City of Brentwood and Contra Costa County to establish such a program. The proposed Community Facilities District to fund high school construction would be separate from the agreement between developers and the Brentwood Union School District to fund elementary school construction. The capacity of elementary and middle schools in the Brentwood Union School District currently exceeds enrollment. Liberty Union High Schaal is expanding to accommodate present enrollment and to allow for some future growth. The new high school, which is projected to open in 1996 or 1997, will operate on a year.-round schedule. The current enrollment and capacity of each school is presented in Table Q-1. 2. a. Impact The project would generate 496 students in grades K-S, 214 students In grades 6»8, and 266 stridents in grades 9-12 . The number of students that would be generated by the project is shown on Table Q•2. The figures are based upon generation rates provided by Economic and Planning Systems for the Brentwood Union School District and by Liberty Union High School District. Mitigation Measures (1) A ten-acre (net) school site on the Spanos project site will be reserved for purchase by the Brentwood Union School District. (2) The Applicant will participate in funding new elementary school sites and facilities through the payment of fees for new residential units pursuant to Q-2 Michael Paoli and Associates ° r { TABLE Q-1 BRENTWOOD UNION AND LIBERTY UNION HIGH SCHOOL DISTRICTS CAPACITIES AND ENROLLMENTS AS OF OCTOBER 1991 Current Sohl Grades Enrollment Ca aci Brentwood Element K-5 505 600 Garin Elemen K-6 522 600 Ron Munn Elemen K-6 450 600 Edna Hill Middle School 6-8 616 750 TOTAL:1 2,093 1 2,550 Liberty Union &h School 9-12 1,800 2,200* future High,School** 9-I2 0 2,2 *Including buildings currently under construction, to be completed for 1992-93 school year **Projected opening 1996-97 school year Source: Laird Neuhart, Land Planning Consultants, 1991 TABLE Q•2 TOTAL STUDENTS GENERATED BY PROJECT Student Generation Number Number of Grade Rate of Units Students SBR SFR NIFR K-5 .35 .18 1202 420 496 6-8 .15 420 214 9-12 .19 .09 1,2#32 420 266 Tatar Number of Students 976 Sources: Liberty Union High School District and Economic and Planning Systems, 1990 Michael Paoli and Associates Q-3 the agreement between the City, the Brentwood Union.School District, and Brentwood area homebuilders. (3) Approval of the project shall be conditioned upon an agreement between the Applicant and Liberty Union High School District regarding the method to be used to contribute toward the construction of the,new high school. The programs currently in place levies developer fees. However, discussions regarding the creation of a Community Facilities-District are on-going between the High School District, the City of Brentwood, and Contra Costa County. Approval of the project shall be conditioned on participation in the Community Facilities District. Participation in the Community Facilities District will take the place of payment of developer fees. Level of Significance The above mitigation measures will reduce this impact to a level of insignificance, although there may be some short-term overcrowding between the time fees are available and the time the schools are actually constructed. 3. a. Impact Students generated from cumulative development in the General Plan area would overcrowd school facilities Full development of the cumulative development scenario would result in the construction of an additional 13,664 dwelling units during the next twenty years; 11,564 single family residences and 2,000 multiple family residences. Based upon the student generation rates of the Brentwood Union School District and the Liberty Union High School District, an additional 4,442 K•5 grade students, 1,910 5-8 grade students, and 2,396 9.12 grade students will be generated by buildout of the cumulative development scenario. This projected enrollment will far exceed the current capacity of school facilities in the Brentwood Union School District. However, the addition of the second high school to the High School District should allow that district to house the students projected in its enrollment area. Mitigation Measure All new development shall participate in the funding of new school facilities through agreements with the respective school districts. The agreement with the Brentwood Union School District in which the Applicant is participating includes most of the current development proposals in the City. f Q-4 Michael Paoli and Associates r Level of Significance The above mitigation measure will reduce this impact to a level of insignificance, although there may be some short-term overcrowding between the time fees are available and the time the schools are actually constructed. Michael Paoli and Associates K SECTION R PARKS AND RECREATION SETTINGIMPACTS, AND MITIGATION MEASURES 1SETIING The Brentwood General Plan classifies parks into three categories: Neighborhood, Community, and Regional Parks. range in size between 2 and 7 acres and are designed to serve from 1,000 to 3,000 people who live within one-half mile of the park. McClarren Park, 3 acres in size and located on McClarren Drive, between Sherwood and Orchard Drives, is currently the only neighborhood park in Brentwood. Community ,P are intended to be centrally located and to serve 6,000 to 12,000 people. These parks offer a variety of recreational areas and range in size between 10 and 25 acres. Brentwood City Park, although only 21/2 acres in size, is designated a Community Park. RIgi2nal .Parks are designed to serve the populations of several cities and should contain no less than 100 acres. Brentwood is not served by a regional park. In addition to the neighborhood and community parks described above, Brentwood offers a 5,000-square-foot tot lot called Curtis Park for the use of local families. The City of Brentwood awns the parks within City boundaries and collects fees for the development of parks. The Brentwood Recreation and Parks District, a special district within Contra Costa County, develops, manages, and maintains the parks. Additionally, the Brentwood Recreation and barks District is able to use the athletic fields of local schools for community recreation programs. The proposed project includes a 16.7-acre park located in the northeast section of the project site. Approximately 1.6 acres of the proposed park site are owned by the A. C. Spanos Land Company. The remainder is part of the Concord Avenue area. Access to the park will be provided by two roads which connect with Concord Avenue, and by the project`s main access road, which connects with Balfour Road. Concord Avenue will provide easy access to the park from outside the project site. Residents of the project will obtain access to the park from the main access road which connects with Balfour Road. Michael PaoU and Associates R-1 Because of its size, the park would be designated a community park. The Brentwood General Plan Land Use Element sets forth the following action policies regarding community parks: Community parks will be centrally located within the community; Such parks will be designed to serve 6,000 to 12,000 people who live within 3 miles of the park; The park should be located near major thoroughfares for easy access. Facilities located in community parks may include lawn areas, playing, fields, multipurpose paved courts, swimming pools, picnic areas, and recreation areas. The City of Brentwood has expressed an especially strong need for a baseball field. Many of these uses could be accommodated within the proposed park. It is the policy of the City of Brentwood to "Plan with local school districts whenever feasible and otherwise jointly participate with them in the construction, maintenance and operation of joint use facilities." Due to the proximity of the proposed park and school facilities on the project site and the practice of Brentwood Recreation and Parks District to use school athletic fields for recreation programs, the implementation of this policy appears feasible. The project includes a 211-acre golf course as an integral open space and recreational feature for the site. In addition, the project includes 85.2 net acres of open space along its southern and western borders. The golf course and open space areas will provide recreational opportunities to project residents and to citizens of Brentwood in addition to those offered by the park. A regional bikeway will also be offered on the project site. The bikeway, b feet in width, will run alongside Balfour Road, the new Concord Avenue alignment, and Briones Valley Road. It will enter the project site at the northern entrance and travel along main drives, first southwest almost to the corner of the project, then east, where it will reconnect with Concord Avenue. 2. PROJECT IMPA!"TS AND M111 ATION MEASURES a. Impact Increased demand for park land and associated recreational facilities and services Buildout of the proposed project will bring approximately 4,957 residents to the area. Based upon the Brentwood General Plan policy of 3 acres of neighborhood and community park land per 1,000 persons, approximately R`2 Michael Paoli and Associates 15 acres of park land would be necessary to accommodate the papulation of the proposed project. The Spanos property by itself, with a proposed 1,051 residential units and a population of 3,212, would need 9.6 acres of park land to meet the General Plan standard. The 16.7 acres of park land designated would exceed the park acreage standard for the anticipated proje t population. Only 1.6 of those acres, however, are on the Spanos property; the remaining acreage is in the Concord Avenue area. Mitigation Measure The Applicant and other property owners in the project area shall dedicate or provide funding to the City of Brentwood and/or the Brentwood Recreation and Parks District for the recreational facilities and services needed to serve the anticipated project area population pursuant to the Quimby Act. If the park site shown on the project land use map cannot be purchased prior to the commencement of Phase 2 of the project, the Applicant shall provide other appropriately situated land for park development. Level of Significance The above mitigation measure would reduce the impact to a level of insignificance. 3. CUMULATIVE INPACIS AND M111GATION MEASURES a. Impact Increased demand for park lard and associated recreational facilities and services due to the cumulative development in the Brentwood General Plan area Full development of the cumulative development scenario would result in the construction of 13,664 additional dwelling units and a population increase of 41,757. When added to the current (1991) City population of 8,255, a buildout population of 50,012 results. The standard of 3 acres of neighborhood and community park land per 1,000 persons, when applied to an ultimate population of 50,012, results in a need for 150 acres of park land. There are only two parks within the City of Brentwood, giving the City a total of 5.5 acres, An 8-acre park, Sunset, is under construction. Planned park facilities included in the Pulte, Seeno, Banner, Triad, and Apple Hill Estates projects will add 24 acres to this total. Proposed park acreage within the Garin Ranch and Brentwood Lakes projects are 40.5 and 5.8, respectively. Recreation facilities are planned within the future Deer Creek (12 acres) and Sand Creek (40 acres) drainage basins, The above figures, when added to the 15.7 acres set aside as park land within the proposed project, result in a total of 152.5 acres of existing, Michael Paoli and Associates R-3 planned, or proposed park land. When this figure is compared to the ultimate need of 150 acres at buildout of the General Plan, it would appear that the amount of neighborhood and community park acreage ultimately planned would meet the needs of the cumulative development scenario population. This planned park acreage will need to be acquired, improved, and maintained. Mitigation Measures (1) The City of Brentwood shall continue to require park land dedications and/or fees as a condition of development approvals and shall ensure that appropriate funding mechanisms for financing, operating, and maintaining recreational facilities and services are established commensurate with the demand created by new development in accordance with the standards of the Brentwood General Plan. (2) The Brentwood General Plan includes a policy to encourage the Bast Bay Regional Parks District (EBRPD) to establish a regional park in the vicinity of the John Marsh home. The City shall pursue the establishment of a regional park in conjunction with the EBRPD at an appropriate location. Level of Significance The above mitigation measures would reduce the impact to a level of insignificance. R-4 Michael Paoli and Associates W i SECTION S ENERGY SUPPLE'' AND USAGE SETTING, IMPAC'T'S, AND MITIGATION MEASURES 1 . ,SLTJILu The project site is within the service area of Pacific Gas and Electric Company (PG&E). PG&E provides energy in the form of natural gas and electricity to the Brentwood area. 2. PHQJECT IMPACTS AND MITIGATIQN MEASURES a. Impact Increased demand for electricity and natural gas Based upon Table S-1, buildout of the proposed project will place an additional daily demand for electricity of between 10.6 and 13.6 megawatts on PG&E. The project will also place an additional peak daily demand for natural gas of 88.4 million cubic feet per day on the utility. PG&E has indicated that they knout of no constraint upon their ability to supply energy to the project (Reid, 1991). The utility will serve the project on a demand basis in accordance with the requirements of the Public Utility Commission. PG&E plans to construct additional facilities in the Brentwood area in 1994 to handle the increased demand anticipated by the Brentwood General Pian. Once these facilities are operational, the utility anticipates no trouble serving the energy needs of the proposed project(Reid, 1991). Mitigation Measure Because this impact is not considered to be significant, no mitigation is required. Mitigation under Impact b, however, will act to minimize the anticipated demand for electricity and natural gas. Level of Significance This impact is not considered to be significant. b. Impact Increased consumption of nonrenewable energy resources Michael Pauli and Associates S-1 p w lyi ;i"Ay Y `n `q V' G c? r 00CA ed tn ta MSA * C.i t3 00 { The project would consume substantial amounts of nonrenewable energy resources such as gasoline, diesel fuel, fuel for electrical power generation, and natural gas. Use of these fossil fuels would occur during construction and operation of the future land uses and from traffic generated by the future land uses. This impact is an unavoidable result of any new development.- Mitigation Measures (1) The primary energy conservation requirements applicable to new development are incorporated in Title 24 of the California Code of Regulations. (2) To the extent feasible, new development should incorporate energy conservation techniques, in addition to those required by Title 24, as follows: • Maximize southern orientation of housing units for solar access. • Utilize both passive and active space heating systems. • Require plantings, screenings, and overhangs to shade buildings and paved areas in order to cut down on heat absorption, reflection, and retention during the hot summer months. • Utilize window shading devices to shade west-facing walls. • Maximize the efficiency of heating and cooling equipment and major appliances. • Encourage the use of solar water heating systems. (3) The project should comply with the mitigation measures indicated in the Traffic and Transportation section and Air Quality section related to extension of transit facilities, construction of park-and-ride facilities, provision of bicycle parking areas, and compliance with the Transportation Control Measures contained in the Bay Area '91 Clean Air Plan. Level of Significance Although the project will not use unusual amounts of energy resources for the types of land uses proposed, the use of nonrenewable energy resources is a significant unavoidable impact. Michael Paoli and Associates S_, C. Impact Project location away from existing places of work, shopping, schools, etc. may result in increased trip distances and gas consumption The project site is located adjacent to the southwest edge of the current City limits. As such, the project would appear to be removed from the City proper and, therefore, would tend to promote longer vehicular trips .for employment . and basic goads and services. As a practical matter,-however, the project's location and design may serve to minimize trip distances and gasoline consumption: • The project site includes a planned employment center, a neighborhood commercial center, a school site, a day care site, and a park site. These features will minimize off-site trips and will promote bicycle and pedestrian travel due to the proximity of these features to the planned residential development. • The site is adjacent to the proposed Delta Expressway which will provide convenient access to major employment centers. • There is a bikeway route planned for Balfour Road which will connect the project with the regional bikeway system. The project design includes bike paths and lanes within the project site. Additionally, it is noted that the mitigation measures indicated in the Traffic and Transportation section and Air Quality section recommend extension of transit facilities, construction of park-and-ride facilities, provision of bicycle parking areas, and compliance with the Transportation Control measures contained in the Bay Area '91 Clean Air Plan. Mitigation Measures No additional mitigation measures are required. Level of Significance This impact is not considered to be significant. 3. + r a. Impact Increased demand for electricity and natural gas due to cumulative development within the Brentwood General Ilan area g S-4 Michael.pace and Associates ` Full development of the Brentwood General Plans area in accordance with the cumulative development scenario would result in the construction of 13,664 additional dwelling units and a papulation increase of 41,757. When added to the current (1991) City population of 8,255, a buildout population of 50,012 results. This is roughly six times the current papulation of Brentwood. "Therefore, energy in the amount of approximately six times the current demand will be needed to supply the City at buildout. PG&E plans to accommodate this increased demand by building additional facilities in the Brentwood area in 1994. Once these facilities are operational, the utility anticipates no problem supplying the City's energy needs (Reid, 1991). Mitigation Measure PG&E should upgrade its facilities and add new substations to accommodate development of the future growth areas. Level of Significance The above mitigation measure will reduce this impact to a level of insignificance. b. Impact Cumulative consumption of nonrenewable energy resources Development resulting from buildout of the Brentwood General Plan area in accordance with the cumulative development scenario would consume substantial amounts of non-renewable energy resources such as ,gasoline, diesel fuel, fuel for electrical power generation, and natural gas. Use of these fossil fuels would occur during construction and operation of the future land uses and from traffic generated by the future land uses. Mitigation Measures See project mitigation measures. Level of Significance While the above mitigation measures will reduce this impact to the extent feasible, the use of nonrenewable energy resources is a significant unavoidable impact. Michael Paoli and Associates S-5 R `1 SECTION T AESTHETICS ANIS VIEWS SETTING, IMP'AC'TS, AND MITIGATION MEASURES 1 . , ETJ1bJ! x The aesthetic visual qualities of a landscape are a matter of perception, the way in which the viewer interprets the qualities of the scene. Aesthetic values vary from one viewer to the next. Thus, any assessment of the aesthetic qualities of the project site, as it exists now and as it will appear once the project is completed, is necessarily subjective. The dominant visual characteristics of the project site include low, gently-rolling hills with annual grasses and oak trees (see Figure T-1 at the enol of this section). A high-voltage power line with tall transrriission towers is visible in the distance, on the west side of the project site (see Figure T-2 at the end of this section). The northeast portion of the project area is generally flat and is dominated by an orchard, several rural residences, and outbuildings. Foothills with grasses and oaks surround the project site to the west and south, while orchards and row crops occupy the land to the northeast and east. A row of mature trees lines the east side of Concord Avenue to the southeast, where a gun club is currently located. A Contra Costa County Flood Control District flood control channel with two dams, in the southeast portion of the project site, and the three east-west trending drainages on the project site are partially visible from existing public roads. The late-1800s coal mine site is just barely visible from Concord Avenue. 2. RMITIGATION MEASIVRES a. Impact Obstruction of scenic vista and creation of potentially aesthetically offensive views The California Environmental Quality Act Guidelines specify two aesthetics impacts to consider: (1) obstruction of any scenic vista or view open to the public, and (2) creation of aesthetically offensive sites open to public view. Development of the proposed project will result in the obstruction, or elimination, of the scenic vista afforded by the existing rural landscape on the project site with its gently-rolling hills, native oak trees, and introduced annual grasses. The loss of this vista may be considered a significant adverse impact of the project by those who enjoy the existing view. Michael Paoli and Associates T-1 The appearance of the hillsides and ridge tops will be dramatically altered by the project. The changes will include substantial alterations to the topography of the hillsides and ridge tops resulting from cut and fill grading and the construction of dwellings and roads on the hillsides and ridge tops. The proposed grading and the locations of lots are shown on Figures T-3 and T-4. The project grading plans call for "graded slopes to be rounded at the tops and toes td blend with natural slopes" and "slope faces to be varied horizontally to resemble natural hillsides". Regardless of the care taken in grading and siting residences, the view of the existing natural hillsides will be significantly and irreversibly altered, and the proposed alterations may be aesthetically offensive to those who enjoy the existing natural appearance of the hills. Mitigation Measures (1) An objective of the project master plan is to achieve a harmonious, aesthetically-pleasing urban environment. To this end, the master plan includes considerable landscaping and open space throughout the project. (2) The project grading plan incorporates the mitigation measures previously described: graded slopes will be rounded at the tops and bottoms to blend with natural slopes and slope faces will be varied horizontally to resemble natural hillsides. (In Section 'V, an alternative project design is presented which eliminates grading and development of the hills.) Level of Significance The design measures incorporated in the project master plan and grading plan should facilitate development of an attractive urban environment. The dramatic, irreversible change in the visual character of the site resulting from the conversion of the site to urban uses and the alterations to the hillsides and ridge tops, however, may be considered a significant adverse impact of the project by those who enjoy the existing visual setting. b. Impact Increase in light and glare Street, housing, commercial, and vehicle lighting in the project area will increase the general level of light and glare in the project site area. Lighted parking lots can be anticipated in the commercial and cluster housing areas and adjacent to the country club. Although there are no specific development plans for the school and park sites, lighted recreational facilities could be placed in these areas. Light from these sources will substantially increase the general level of illumination in the area and may produce glare that would adversely impact individual uses. T-2 Michael Paoli and Associates t 2 ....r r , � ► fir•' �-'....,,,.fi. � i •t y t 'r• ,y ""' ;�i' ��� E � � i t t t t J tt `��s.",�„'��4t'"r }1 � } �' +.., •. � r t"rlt'� �t y�.ra t} t ., t} 11! a t Y � t Y,13'd'�.`�`�..' ',� ,t ..' E t9�, �..::..,.,, l•.i � f+j t t f � Et � .",� } i t 4 t t �,�.} # s*' t a `yn } y u jU } ``� E �f;�,+r �f'r✓yr .,,r-°��y,,.y" +� t i }ti }t } �. t } f b {�'.•�.�1 i i�' t J�IJ;[w''y°,. 1�c.' Jar, ..,. } r } ' +.t j /V � t ti E } s E } t i E �,rt� E "°r Il�c t f r'',rr• i 1` , E } t l� Yl It 1 I'ro% MCIw l it `•# # � t � � `#E oil t' t # �• r'r .oy ��a c3�""4�t;�.�j E} i 1,,.•=»�\�����f 1. �' 4 �r � � � ! � � � � i # t ....•.--( #� #�� s# • ;" � � # # #. ,rad ir.u,t+ttt� - `1+�; � u is ...%i1s.y1 �a � txjxlxx+tt rE �{ p41t1 y�r:• t r � r ° Mitigation Measures (1) The landscaping pian for the project indicates that extensive landscaping will be provided along street and property perimeters. Adherence to the landscaping plan would reduce light and glare impacts. (2) Specific development site plans for the commercial, cluster housing, park, and school areas shall be reviewed by the City to ensure that lighting is designed in a manner compatible with nearby uses. Controls shall be, placed on the height, direction, and placement of light fixtures, Level of Significance: The above mitigation measures will reduce this impact to a level of insignificance. 3. CUMULATIVE IMPACIS AND MITIGAIION MEASURES a. Impact Cumulative development within the Brentwood General Plan area may obstruct scenic vistas and create aesthetically offensive views Scenic vistas afforded by the agricultural open space land in the Brentwood area will be lost as the land is developed with urban uses. Farther, views that are aesthetically offensive to some may be created by the development. Mitigation Measure Design measures, such as those incorporated in the proposed project, can be incorporated in other individual projects to facilitate an attractive urban environment. Level of Significance Appropriate design measures incorporated in individual projects should facilitate development of an attractive urban environment. As with the proposed project, however, the dramatic, irreversible change in the visual character of the existing agricultural open space areas may be considered a significant adverse impact by those who enjoy the existing visual setting. Michael Paoil and Associates T-5 rt Aj .04 jC4. a 01 16'., TT sk 44 t t TV- 'Y "•.,0 a it � ff x o { y{ o ems; u r i,ey: S'Y.' Jf . Y r c iE s « 7O�v Ai s S ♦ ♦ M1 � • + + t� �4 K Vis.��4�> r t a n w r f • � p f i. 3 ( r k h{ a 4 • i � h� C 'M .� r pt \r � jv M f k 9 SECTION U x x CULTURAL RESOURCES SETTING, IMPACTS, AND MITIGATION MEASURES 1. S ITING a. Background The project site was surveyed for cultural resources in February and March 1994 by the Institute for Archaeological Research, following a records search by the Northwest Information Center and additional background research. Dr. L. Kyle Napton directed the Phase I Cultural Resources Investigation which resulted in updating the record for a historic coal mine site first identified and recorded in 1984, and recording the remains of a ranch complex. These two historic sites,U-; CA-CCo-480H and CA-CCo-611H, were the only cultural resources identified on the project site. The Phase I Investigation included measuring, sketch mapping, oral history, and archival research, in addition to the field survey. The objectives of additional historical research on the coal mine site and the brick feature on the ranch site were to identify their historical context so their importance could be further evaluated and to expand on possible mitigation measures (see Figure U-1). This investigation, conducted by Michael Paoli and Associates in 1991, included consultation with knowledgeable persons, library/archival research, a property records search at the County Recorder's Office, and direct field inspection (see Appendix 2, Sources Consulted). Copies of the Phase I Deport and Additional Historical Research Deport are available for review at the City of Brentwood Community Development Department. b. Historical Context (1) Coal Mining in California Beginning in 1861, the commercial value of recent coal discoveries in the Mount Diablo region began to be realized and various mines were independently developed (Sullivan and Waters, 1980.53). The peak years of production were 1867 through 1882 (Praetzellis, 1:989:($)4). In 1868, these mines supplied the hub of industry in California, San Francisco, with 47 percent of its coal (Sullivan and Waters, 1980:58). Large quantities of the lignite coal were also consumed at Sacramento and Stockton and "used almost exclusively by the river- U-I ivenU-}A working definition of a cultural resource "site" is "any area or location occupied as a residence or utilized by humans for a sufficient length of time to construct features or deposit a number of artifacts" (SAA n.d.t22). Michael Paoli and Associates U-1 t .•ti� t o a ZD Lj [°� 166 30 SCALE,' MILE 1000 0 1000 2000 3000 4000 FEET Michael Paoli CULTURAL RESOURCES LOCATIONS and WITHIN PROJECT AREA FIGURE U-1 Associates (detail and enlargement from USG4 ,Brentwood, 1978) ferry and coasting steamers, and at places convenient to the rivers, particularly by the flouring mills" (Macfarlane, 1873:567). Welsh, English, Scottish, Irish, Italian, and Chinese immigrants worked in the Black Diamond mines, as did Americans from the coalfields of Pennsylvania (Sullivan and Water, 1980:54, 58). The English bard-and-pillar coal mining system, called "room and pillar" in California, "had been developed to a fine art" by the late eighteenth century (Griffin, 1971). Men worked alone or in pairs in separate bards or "rooms" on the coal vein. This gave rise to "the tradition of individual craftsmanship" (lbid.:10)• The Cornish steam pump system used at these mines "was relatively simple in principle (if not application) and could be erected, operated, and repaired by analphabetic Cornishmen who would have migrated to hell on the prospect of a job in mines in which it was employed" (Young, 1975:146). Coal mining in California declined for several reasons. The cost of exploration and production was high, the coal was an inferior grade, and the wheat boom of the 1870s reduced the shipping costs for imported coal by providing return cargo for the ships (Sullivan and Water, 1980.58). In 1885, the California Legislature reported: "The only companies that are now making, or ever have made, any considerable production here, are the Black Diamond and the Pittsburg—The developments made in the Empire [Mine] and the Rallcho de Las Ueganos are such as have served to keep life in these properties, which will ultimately, no doubt, be brought into a productive condition" (California Legislature, 1885:267). [emphasis added] (2) Settlement History of the Project Site Late Prehistoric Bay Miwok village sites have been recorded in the surrounding area but no surface evidence was found on the project site (Napton, 1990). John Marsh bought the 17,000-acre Rancho de Los Meganos, of which the project area is a part, from Jose Noriega in 1837. The legitimacy of the land grant was finally settled by the courts in 1862, six years after Dr. Marsh died (Slocum, 1882:486). By May 1868, considerable work had been done to develop a commercial coal mine on the property. The machinery was in place and several slopes and two shafts had been dug by "hand and horse", producing "somewhere between five thousand and ten thousand tons of coal, most of which has been used under the boilers at the 'Engine Shaft"' (Goodyear, 1877:66-67). In 1872, Charles Marsh defaulted on a loan against the Rancho property from the Savings and Loan Society of San Francisco, forcing the sale of the property to Michael Paoli and Associates U-3 James T. Sanford of New Fork, in the name of the Brentwood Coal Company (Emanuels, 1989:199; Daily Gazette, 1908). Russell F. Lord, a coal mining engineer from New "York, was the mine manager (Daily Alta Californian, 1875). John F. Williams and James T. Sanford owned four-fifths of the stock in the Brentwood Coal Company and Sanford held the remaining fifth in trust. The San Francisco Savings and Loan Society still held the mortgage on`the Rancho property. In 1875, Sanford declared the Company bankrupt and advertised the property, coal mine, and machinery for sale. The following year, Williams obtained an injunction to halt the sale, essentially charging Sanford with fraud (Benham, 1876). In 1877, Sanford sold several acres in the northeast corner of the Rancho to the San Pablo and Tulare Railroad Company for a train station, railroad right-of- way, and townsite. This was the beginning of Brentwood (Emanuels, 1989:199). Sanford defaulted on his loan in 1878 and the Savings and Loan Society of San Francisco subdivided and leased the land for dry-land farming of wheat and barley while litigation over the property and the coal mine shares continued (Emanuels, 1989:200; Purcell, 1940:170). In 1900, Scottish investors Balfour and Guthrie (B&G) bought out the bank's interest and Sanford's heir for approximately $200,000 (Emanuels, 1989:200; Purcell, 1940:170). Over the next few years B&G built a hotel in Brentwood and underwrote the Bank of Brentwood and the water and sewer system. They also built electric pumping stations and a system of concrete-lined irrigation ditches. In 1917, B&G organized the Brentwood Irrigated Farms, ten separate camps each with its own office and shops. Fifteen- to twenty-acre farms were sold for fruit orchards while smaller parcels were sold as homesites (Ibid.:201). In 1941, the Pombo family purchased the subject property and tore down the old wooden buildings which they understood to be the slaughter house, bunkhouse, and related buildings and structures from a hog farms operation. The Pombos livedin the house on the property until it burned down and the only structure they added was the metal garage (Pombo, pees. comm., 1991). C. Findings (1) Consultations Adrian Praetzellis, Senior Historical Archaeologist for the regional information center at CSU, Sonoma and author of the National Register nomination for the Black Diamond Mines District, offered the professional opinion that the Brentwood site may be eligible for the National Register as a contributing element of the Black Diamond Mines District. He concluded the integrity of the engine platform is "good", based on a review of recent photographs and a comparison with similar but less-well-preserved structures at Somersville and U-4 Michael Paoli and Associates Nortonville (see Figure U-2). Dr. Praetzellis added that the site boundary should include the subsurface features as well as the surface features. John Waters, Mack Diamond Mines Preserve Mining Director, examined the Brentwood mine features on October 15, 1991. He was impressed with the quality of construction and preservation of the engine platform and noted the shaft opening fit the descriptions in the State Mining Engineer's reports (1870;1877). He also observed that the easternmost section of the shaft has a subsurface brick foundation and a shallow pit between the shaft opening and the sandstone engine foundation which would have been necessary for the Cornish pump rod and counterweight (see Figures U-3 and U-4 [Figure U-4 is located at the end of this section]). The brick fragments scattered downslope from the round sandstone feature, behind the engine platform, support the idea that it may have been a foundation for the "stack" or chimney to carry exhausts away from the steam engines. Barbara Bonnickson of the east Contra Costa Historical Society referred the investigator to. Rose Pierce. Mrs. Fierce reported four houses originally stood where the gun club is now, east of the coal mining area on the east side of Concord Read. She said the houses were moved to Brentwood after the railroad was built [in 1878]. The Director of the Centra Costa Historical Society in Pleasant Hill, Mrs. Betty Maffei, provided background information about the history of the area but made no specific recommendations about the resources. (2) Coal Mining Period, c. 1867-1872 Among the earliest historical accounts of the Brentwood mine are those of California Mining Engineer W. A. Goodyear. Goodyear visited the "Brentwood Mines" on several occasions during his "nine years of intimate acquaintance with the coal mines of the Mt. Diablo region" (1877.68). Concerning the "Pacific Mine on the Los Meganos" or "Marsh's Grant", he wrote that "a considerable amount of work has been done and much expense incurred": At one point a slope and at another a shaft have been sunk. The slope, starting from the outcroppings, goes down upon a bed of coal with a gentle pitch, which does not exceed 18°, for a distance of about 170 feet. From the foot of this slope a gangway was driven west about 370 feet, and easterly 150 feet or more. [The coal) furnished for a considerable time all the fuel employed for the boilers which drove the somewhat heavy machinery at the shaft. The shaft, which is situated farther to the north, was sunk to the depth of about 400 feet to reach the same bed as that on which the Michael Paoli and Associates U-5 . r c r �ff o- �a:f^* a' ,``� w f�� ''�9;'`d""r4�}. - �4♦ �'* fi1�t�F „"''�'6'�,f,�,•� �s �± MM, , f E � 71 'i' �' c � ,r So a to tS$�r^�a•' a y. >:'{ "` ^. �9z al�utJ'*�c."'� .; •��'�'„ ,�"'i%,"+��� � �' 'r t p.� } ".c" m*�.' 4''x''3` _ -^7 � R •as��t [� ar�txr�A �^a n .�Ms „�.ay {s �a,3.'?i'e t ��'� f' .�.t f. ^�`f`_° �� '#;�t'� Pr fft'°" r �F v < » K A 4 .�. :r: •°',a t$ `� � 4$pi a}a��{', �}�a�r r#"` T i g y y ,� �.,•, ��i I� IFiC ,��,",� } r * T?•'? TMs,» a <w� v # � a «` �� id,s t `r }i; � f e a M• �gp"x o s^ * � 4.,�'a"D` i s ie'�S i �J �� ?°�. � sh f �4 .a:•°+f�'��P'� q y�"^"< .�'!�y'tip`y��`.";sb in,.w ""1ww" 3" r^'w,+w r• <.: "n°*1 Irv, �;`f��%� �$►'•^ �r��,.,i� y''�t`'°"�+ 5#*`.µne.. ✓�.a¢ ..,w.iQ° *yj� 'Iy. " taN•�` trf . �'s."�' ,,,,� . �r + ^w,'r r,pfR�'v4' x'C�' wi iq„�, *.� d t✓�h Y�.r����'MF. t o'."�q'vt .�^' g �'�„ `K4� ;y t�g,p� ��*l `'9 g9 ��`,. +t Mho. *"s.4a° ?},�✓"'"y�"'':+ #'.n:�wM�*✓jy" tis ae• �"+y�,°'^�, ,�t'• .,�' x Y�{�+� „ �"Rv7.t b } ., a ai S. ,"° eS"' Gms. a�•�.P„Alna.Y '. '',� 9 "�T t" Xpy4a aIVl: i* y�}pf gn..tSr6a4yk° ,... '.Y!'f8� m ` s �>d+ p ,•r+` .d`^,a' a 44 -, t ' .,ax'+�a e w^�+@� �„�t4Ls'O.a4°'°' ��qy •. ,i, '%� 'M'os :�P � WE Michael F .�t d¢e�' a ^� i o- y+9t �..� � ,., • 'sem`` '. r ,� a � '+.'tea "'yA�e�� 'i,a� �.��"�ta, ct,.. we � ., t`ro'i,.•'�i.�tp^t 't rg, �<.. M � a0li w and Assocites * # ! y * a ,r 3S4 MANUAL OF UrNIN(;. i 1 All the foundations about the shaft should be carefully'laid, for the condensed steam and pump. water soon makes the ground r yielding. In stable ground heavy beams buried in the stone will suffice; in ground at all soft 4 secure foundation can only be ob- tained by concreting a consider. able area for 6 feet deep, and erecting a rigid .timber or brick- work base several feet high (Fig. The Speed of the Cornish Pump.—A variable regulator enables the engine somewhat to change its speed commensurate with the water to be discharged. The rod speed is about 6o feet per minute, giving six to ten w, strobes of xo or 6 feet each. To increase the speed it is preferable ' to increase the length of stroke -: rather than the number. Th, maximum speed cannot exceed that of the inflow, or the plunger would acquire on its down. stroke an acceleration before Fla.s S.—The Comish Pump. the water had fully entered the Michael Pacdl' and Diagram of a Cornish Pump Works FIGURE U-3 Associates (from lhlseng & Wilson, 1911) slope goes down. The east side of the shaft was timbered and planked to the bottom. At the time of our visit [1868] the shaft had only just reached the bed, and the opening to the west did not extend more than thirty or forty feet from the foot of the shaft. After that, however, the gangway was extended west to the distance of about 175 feet from the shaft...The general character of this bed resembles that of the Mack Diamond, as seen at Somersville. All the machinery was good and well put up. The shaft is of good size, in three compartments, and well timbered. In a later account, Goodyear describes the second shaft at the mine, the stratigraphy of the coal and fire-clay beds, and the machinery. He also refers to the "financial trouble" which led to the closing of the mine in 1868, and a second closing after 1871 (see Appendix U-1). (3) Clay Mining Period, 1868-1886 The California Division of Mines and Geology Library provided the following information about clay mining on the property: The greater part of the clay that has heretofore been used by the Antioch pottery works, carne from the Brentwood Coal Mine. This mine belongs to the Clay Street Savings and Loan Society, of San Francisco, but is not now in operation (California State.Mining Bureau, 1888:161). Clay production was one of the earliest industries of the county beginning prior to 1868. At that time clay-kr fire-brick, crucibles, and stoneware was obtained from the Black Diamond coal mine at Nortonville and Marsh's Ranch. In the period 1868-86 the Albion Pottery Company was making pottery at Antioch from clay mined at the Brentwood coal mine (California Division of Mines, 1951:(4) 572) [emphasis added]. This information, together with Lord's diagram (Napton, 1990) indicating a brick kiln near the hoisting shaft, are sufficient to confirm that bricks were made on the property. Additional research on clay mining and the Albion Pottery Works may provide more information about the brick-and-concrete feature (CA-CCU-611 H, Feature A) (see Figure U-5 at the end of this section). (4) Cultural Resource Disturbance Only one of the three historically documented coal mining areas on the project site (Lord's Group 2) (Napton, 1990) has recognizable surface features with sufficient integrity to be meaningfully interpreted. This is the area around and including the sandstone engine platform. The surface remains in the other two U-8 Michael Paoli and Associates k K P ares to the south and west were probably destroyed during construction of the irrigation/flood control dams and underground pipelines. Evidence of disturbance from historical ranching activities include the water troughs, barbed wire, and fence posts in and next to the mine shaft. The outer layer of sandstone blocks on the eastern wall have been removed, exposing the metal rods that go through the structure. The mine waste piles have eroded slightly and the nameplates or date-stones on the front, back, and side walls of the engine platform have eroded or been defaced (see Figure U-4). Two of the metal bars sticking out of the subsurface brick pump platform at the north edge of the shaft, and a small collection of ether artifacts (now on exhibit at the Byer Nail House Museum in Brentwood) were removed by Rose Pierce of the East Contra Costa Historical Society in August 1991, by permission of the property owner. ENGEO tested the property for mine shafts and tunnels, digging three test borings at the.engine shaft, eleven other borings, and seven "test pits" elsewhere on the property. This activity probably disturbed the stratigraphy in these areas. Comparison of the engine shaft and engine platform with Figure U-3, indicates the integrity of this structure is good. Clearly visible mine waste piles around the shaft and engine platform also indicate the immediate area has not been graded or disturbed by plowing. The presence of historical glass, ceramic, and brick fragments on the surface of the mine site indicates there may be other artifactual remains below the ground surface that could answer questions about who worked at the mine. All that was necessary to close the mine when it went out of production was to stop,pumping out the groundwater (Goodyear, 1877). It is likely, therefore, that the engine shaft remains uncollapsed at depth, as concluded in the engineering report (ENGEO, 1990). d. Conclusions and Cultural Resources Evaluation Criteria These findings support the conclusion that the Brentwood Coal Mine site is an important archaeological resource. Following the California Environmental Quality Act criteria., the engine platform may be the "best" and "last surviving example of its kind" (criteria RIC). The surrounding surface and subsurface components of the mine are "at least 100 years old and possess substantial stratigraphic integrity" (criteria IIID) and they "involve important research questions that historical research has shown can be answered only with archaeological methods" (criteria IIIE). The Brentwood Coal Mine, and the sandstone engine platform in particular, are also believed to be eligible for nomination to the National Register under Michael Paoli and Associates U•9 Criteria C: "structures that possess integrity of location, design, setting, materials, workmanship, feeling and association", and "embody the distinctive characteristics of a type, period, or method of construction, that represent a significant and distinguishable entity whose components may lack individual distinction".0-2 The site may contribute to the significance of the Black Diamond Mines National Register,District as unique, visible features of the coal mining era in California and Contra Costa County. The surface and probable subsurface artifactual and structural remains on the mine site may be eligible under National Register Criteria D, as first suggested by Dr. Napton in the Phase I report, in that they "may be likely to yield information important in prehistory or history". Historical archaeology excavations have the potential to yield information regarding the engineering of the mine, the ethnic composition of the workforce, their "consumer behavior, socia-economic status, ethnic boundaries" and associations.u-3 Test excavations at Sornersville, conducted by the University of California, Berkeley, yielded an important collection to use as a comparison (Praetzellis, 1989.14). Information of this type can only be obtained by archaeological methods because the available information from other sources is incomplete. The mine may also be considered important locally based on its brief but pivotal role in the establishment of Brentwood as a community. It was the coal mine owner/stock vendor, James T. Sanford, who sold property to the San Pablo and Tulare Railroad Company for the Brentwood townsite at the northeast corner of the Rancho de Los Meganos in 1877 (Bmanuels, 1989.199). Historian J. D, Francis explains the importance of the coal mining industry to the history of the area: Through the [eighteen] sixties and seventies, settlement in the Diablo region grew and prospered on coal. The mines brought laborers, mechanics, railroad construction gangs, teamsters, overseers, boatmen, and their families. Stores sprang up. Rail connections were laid to the mines. Shipping flourished. The coal boom first provided struggling farmers with a breathing spell and finally gave an impetus to the farming industry (c. 1937). "John waters, lvlining Director of the Black Diamond Mine Preserve, was asked about the possibility of dismantling the engine platform structure and moving it to the Black Diamond Preserve. Although this would mean a significant loss of its location,setting,association,workmanship,and feeling,the design and materials could possibly be preserved and placed in a content where they could be more readily interpreted for the public. Mr.waters'response was. "anything is possible but it would probably be too expensive" [to be feasible] (pers.comm, 10/15192). Given the irregular shapes and sizes of the sandstone pieces used to construct the walls of the structure it seems optimistic to think that it could be dismantled and reconstructed without considerable loss. U'3Phase 11 site testing should daft be necessary to determine the site boundary or eligibility of the site in this instance because the mine waste piles clearly indicate the important area of activity associated with the features. U-10 Michael Paoli and Associates Not enough information was found to determine the function of the back-and- concrete structure (CA-CCO-611H, Feature A). used on the materials and the research finding that fire-clay was mined on the property, this structure may be an important part of the late 1800s clay mining operation. The rest of the ranch site, including concrete slabs and corral fencing, has components that are at least fifty years old but no important associations or structures have been identified. 2 . a. Impact Loss of CA-CCo-480H, the Brentwood Coal Mine site The Brentwood Coal Mine site (CA-CCo-480H) is thought to contribute to the significance of a National Register Historic District, the Black Diamond Mines. As the last surviving resource of its type in the region, the engine platform and associated artifacts and features are also important locally as the best example of the first industry in the area. The association of the mine with the founding of Brentwood and the settlement and economic development of the area are contributing factors to its importance. Loss or damage to the site would be a significant impact. Mitigation Measures The following measures are applicable if the site is to be preserved: (1) In-situ preservation of the site, as a permanent conservation easement with access restricted to qualified researchers, is the preferred method of avoiding damage to the resource. A Determination of Eligibility shall be filed with the State Office of Historic Preservation for this resource before further action is taken. The non-binding determination could affect the recording standards for the site, as well as the tax credit of donated property and future tax credits for rehabilitation or stabilization. (2) The cultural resource site includes the 400-foot vertical shaft, horizontal gangway or tunnel, and the mine waste piles that extend downslope east of the shaft to the property boundary. A nondestructive mine-closing device shall be installed in the shaft for public safety that would also allow access to the underground features by qualified researchers. (3) Planning a park or open space to incorporate the site, with fencing around the coal mine site indicated on Figure U-6, would protect the site from destruction and preserve a portion of its setting. This is consistent with the City and County General Plan goals and policies to preserve areas of historic value and develop surrounding areas with "compatible and high quality design in order to protect and enhance the historic quality of the Michael Paoli and Associates U-l l cl U) CQ IRN 0 Ile, r 1 r r r d t 0 co 41 M D r s' CL rm ' z i CONCORD AVENUE h area" (Brentwood General Plant 1983; Contra Costa County General Plan 1991). The mining area could be incorporated as part of a park site which could extend west to the top of the knoll to preserve a number of large oak trees (see oak tree mitigation measures in Section F, Biological Resources). (4) A historical archaeologist and raining engineer shall design and monitor these measures to insure their successful implementation and continued- effectiveness. The following measures are applicable if avoidance of the site is not feasible: (5) If avoidance is not feasible, a multi-disciplinary team of researchers including a historic archaeologist, a mining engineer, and a landscape historian shall investigate the property to determine the precise layout of the underground mine features and to recover important contextual information about the mine. This includes careful removal of the ranching debris in the shaft and investigation of the subsurface components to the extent feasible. (b) A historical archaeologist shall monitor the "sub-excavation" of the mining areas proposed by ENGEM}, with authority to halt the operation if important cultural resources are encountered. The historical archaeologist shall then direct the recording and removal of the artifacts, sails samples, and excavation records to a suitable laboratory such as the Archaeological Information Center at California State University, Sonoma and ultimately to a regional curatorial facility such as the Black Diamond Mines Museum, (7) As further mitigation, archaeological test pits shall be excavated to recover an important sample of the engineering and domestic information associated with the history of the property. Excavation would only be required if avoidance is not feasible. Level of Significance If mitigation measures 1-4 are implemented successfully, the impact will be avoided or substantially reduced to a less than significant level. If avoidance is not feasible and mitigation measures 5-7 are implemented successfully, the impact will be reduced, but not to a less than significant level. b. Impact Loss of CA-CCo-611H, Feature A, the brick-and-concrete feature Not enough is known about this structure to determine its precise function in relationship to the coal and clay mining activities on the property. It is x'vlichael Paoli and Associates U-13 considered to be at least 100 years old due to the nature and condition of the building materials and documentation about the fire-clay mining operation and brick kiln on the property in the late 1800s. The structure is not of recognized importance and its association with important events is unclear. Therefore, there is not enough evidence to support a conclusion that the loss of this structure would be a significant impact. Mitigation Measure (1) Prior to project construction, allow access to the structure by qualified professionals to measure, photograph, and examine the feature and its setting for the purpose of recovering information about the structure. Copies of any such records and photographs shall be deposited with the Contra Costa Historical Society, the California Division of Mines and Geology Library, and the Regional Information Center at CSU, Sonoma. Level of Significance This impact is not considered to be significant. c. Impact Loss of important subsurface cultural resources Surface surveys and historical research cannot reveal all of the potentially important cultural resources that may be in a project area. Mining slopes, shafts, and gangways west and south of site CA-CCo-480H, identified in the historical literature, may be lost to science by this project. Other as yet unknown subsurface cultural resources may be damaged or destroyed during project activities. If important subsurface cultural resources are damaged or destroyed during project activities, this would be considered a significant impact. Mitigation Measures (1) All contractors and subcontractors for the project shall be informed in writing of the potential for discovery of important cultural resources below the ground surface in the project area. If any are found or disturbed, all work must be halted within the area in question and the City of Brentwood Community Development Department and a qualified archaeologist must be contacted to evaluate the find. (2) If human remains are uncovered, the Contra Costa County Coroner must be notified immediately, The Coroner has two working days to examine the remains and 24 hours to notify the Native American Heritage Commission if the remains are Native American. The most likely descendants then have 24 hours to recommend proper treatment or U-14 Michael.Paoli and Associates i x disposition of the remains, following the Native Amerman Heritage Commission guidelines. Level of Significance If important subsurface cultural resources are encountered and the mitigation measures are implemented successfully,the impact would be reduced to a less than significant level. 3. CUMULATIM BRACTS AND MIMATION MEASURES a. Impact Cumulative development within the Brentwood General Plan area .may adversely affect cultural resources The general conclusions regarding cultural resources sensitivity for the planning area presented"in the City of Brentwood Existing ConditianslBaseline Data Report are as follows: Much of the Plan Area has a low to moderate sensitivity for the presence of prehistori coordination with the Stag Office of Historic Preservation through the regional information center at California State University, Sonoma. Level of Significance If the mitigation measure is implemented successfully, potential impacts can be avoided or reduced to the level of insignificance, :.i U-16 Michael Paoli and Associates 1 { F � y • ""� +r �. ,��, b�8 add � #°t ` M � i A • � � � Qtr �� ��� �4*� < t Q f e�tl 1 .e p ss q P► ,r , c A P �• -S�y W4 F w � ' .. x�tyF • .. 4Y 9 f S� � �bt 3X, b � ,�� 3 - �•4 H, �Ylr�W '� .' r�r'4`. hPi iL�µ t � 'y,0 y�; 4 �1 y t.• � � < •,`,h ¢�'k""!�� � ,N.� a.�.�.� �y}. i:'.C,e ��� � +�',{1 � �y��Y � �bt kA �':� tyif �*f+ At • 'y�C }tt(p¢1 9+;" � fie'' s �• ,j • M d® �•y� �a� 4 „b f g, 4 �i� � d , ,2 SECTION V ALTERNATIVES TO THE PROPOSED PROJECT 1. CIENERAL t a. Introduction This section addresses five alternatives to the proposed project. Information that is presented for the alternatives includes their location, design, and population characteristics and responses to the following issues from Section 15126 of the State CEQA guidelines: • Could the alternative feasibly attain the basic objectives of the proposed project? Is the',-alternative capable of eliminating the significant adverse environmental effects of the project or of reducing thein to a level of insignificance? Is the alternative environmentally superior to the proposed project? b. Summary of Alternatives Considered The five alternatives considered are summarized below: • No.Erb: The project site would continue to be used for agricultural purposes (grazing land and orchards). The site would be developed in accordance with , the existing Brentwood General Plan designations. The site is designated for Agricultural Conservation use except for the northeastern 80 acres, which are designated as a Manned Employment Center. This alternative has three variations. In all variations, no development would occur on the hill areas above the 200-foot-elevation contour. In Variation A, a golf course and 866 single family residential units would be built on the lower areas. The 80-acre PEC area would be developed as specified in the existing general Plan. Variation B would be the same as Variation A, except the golf course would not be developed. The number of single family residential units (866) would remain the same. Michael Paoli and Associates V-1 Variation C would be the same as Variation A, except only 650 single family residential units would be built on the lower areas along with the golf course. • Modifications Requested by PIanning Commission: This alternative has four components which can be incorporated into the project together or separately (see Figure V-1). Component .1 would reorient -the.. . neighborhood commercial and .low density cluster housing land uses shown for the 26-acre area bounded by Balfour road, (new) Concord Avenue, and the east-west collector street (5 Drive). Neighborhood commercial uses would occupy the northern 14.7 acres and the cluster residential units would occupy the southern 11.3 acres. Component 2 would replace about 11 acres of the 16.7-acre park site with the F-5000 designation. Component 3 would designate the 8-acre portion of the Assembly of God property west of new Concord Avenue for church use. Component 4 would realign new Concord Avenue so that it would become a frontage road adjacent to the proposed Delta Expressway. • Altr at ve Pl!2ject Location. in this alternative, the 1,051 single family units and 18-hole golf course from the Spanos-owned portion of the project site would be located on about 470 acres southeast of the intersection of Fairview Avenue and the EBNM 1Vlokelumne Aqueduct, in northwest Brentwood (see Figure V-2). The 80-acre PEC area would remain at the southwest corner of Balfour Road and Concord Avenue. C. Project Objectives (1) City Objectives The following aspects of the project will advance the City's goals and accordingly should be considered the City's objective in evaluating the project: • The project's championship golf course will be a significant recreational opportunity currently unavailable within the City of Brentwood. • The residential component of the project will consist of a variety of housing types. The resulting homes and price ranges will address the needs of first-time, move-up, and estate home buyers. V-2 Michael Paoli and Associates prN er( pgpJFC CygCLLS631 1 v GSgIMlwi1'WOO C+ 34iW 4 _w } ant _ .,.. .�1,.-�•,�" ",7�'^v.��.w•,.,�,vSa{r �rr��,.`ry 1 ` V 1', t .. -, f y jt� ♦""4 y- ''�'�r``��```4`��tr � { G << , -�l •.a 1 xe,ghbOrhood 50t3O Reorient duster 1} CLUSTER Commercial t '1 1�ESti��N�1A1•• �__ a Residential Park to SF 5000 Change p�_ to -N4 i Change SF 6000 } r �rn0�tF-a ..; ! 1 Church and Related )bLz3E �y: i �,SCtUt3 ..•.�•• il��;i Facilities l) C�A.T ' GHC3G}L � } i Hent Sr I { ,u{ m cnt cif as ,� � Change Alignm incord Avenu" co VAt r�• ti`i ♦W ,� i FOUESTF ict ael Paull MODIFICATION CpMt�tlSS1C�t� ' PLANNING and ASSOClatas f {[##kk Xf dd iREfRfi.t �#�( •�FtC5tltlf� F 1# -����. ,����lr"' i€�M14M����k�.�� �� ��s.e� 1x�ii�i.�i#i�N:i7 `a�flts • x ar t • .a}♦�+ww�♦•#��►114 a�~�''^ ` �1I1f � i� � wxw► � � {t R'x#� f1{ ��'�}y^r : a•a x Att11Rstl��. �r���}� ■ yu� ww.�� #•�ay"�•' �N°*,7��'�*' i " �� Y}�r a! yr `? { w r a f � x * ♦ a eR' � ■ f ���� �k`R�� �}°i$�4{ ��```4'3.\��ti� *'i*wy��*s+��p�{-��.^^��-a x'»w*a♦ ♦*+�•x � ��'��t +k-^ •ro •ytirr't�BlC"}"� M r�i i a y��#�+j�'J��S� aw d� }.y5• �,M1 7�1VYr`.•1d� � a *t f *!*w ' i.�l'!!f, �w».w ww fwn �;;.yJ*yff Nrf `' ''+ 11'�..1"'l*.1"R..1"7.� # KMXX o ++w+e t w x o x+t • •*,w o a#o's�s�Y`u'��'rX"tis�°+�*e i x`x y�i r•��'li� , } ;.f ♦♦6 R♦a x N N w x •w a M'E N• t�*x w e e. • �!o�x ei[[�'�''•����wN'•s*e ♦xsn*o �x x *w i�y�'"�"�:,g4�wio* •' � '*`":�•,I��"*="__•l�` �� o a!w •+«�•+e[rex5�«e w t"»A e�x♦f'*•tw♦wa •rf..sr'4�Pp s'*P��:*� «�� :f,/' rtes•+: a* .!♦«♦t i w i' fa a , .7;14,M111,11,11 e raR�111 S N »♦♦4 R i e N: Fie 4 e 4.«F �a4�A i!• �xf i�Ay'�}J NMI goo Project Site Alternative Site 7, F! x*9♦!1•«w *!O �! f i;µ�l� #� �••`f�i.;{"�� F 1*R•iy6 �7■E T�1�A� � � * a�� .,e .,+.7°t3:a+rT,+„'1'�"'/'+� �'�:"''�"'�'k �R�#_, ,t�G€'s1��'1�;��g�''' a°�^'.• _. t7 w�•!tx,wYNM*Rt !♦«•+t•N : f�fsr. '€" � �. f(�4„���{��s�.�;s: Y�� �,��� • + �� ♦i •M a t N N R N»+ f t R• !8 a♦ � YNMI�' M d },,,y,,,f,))..z,,:j- Y♦*• w♦*« 7'�%.i s w x»a+ .�r*♦ ,��fyp�p�t�� (y �a • x . �� �. • i•+a+ x M s a a R♦w w x •R wy»��w,#��*� • !,# '^*5ew - �... "`_. w!s r s*i r.a � ♦w*S�x •• •syr�*�#aIRM'1��� ,!i!•+•te♦+w'xe•x«!a!w w+*'.+t•r,ita ♦!raw+i+k«**�Yi�'�*�t a������� i A a x•• + f t t♦w � � A x* � v r •f+R N t Planned Employment Areas Proposed for Development Rl }.�... • * 4 Michaely Others 10Paoli« . and ALTERNATIVE SITE SELECTION FIGURE V-2 Associates • The project will further the City's plans for Planned Employment Center uses along the Delta Expressway growth corridor, by the development of commercial and office uses. • The creation of jobs in the Planned Employment *Center of the project will contribute to an improved balance between jobs and housing. • The project will facilitate the construction of the Delta Expressway, by providing right-of-way dedication, agreements, and construction financing. • The project will generate tax revenues along the Delta Expressway, and the Balfour and Concord Avenue roadways. The golf course, with its clubhouse, restaurant, bar, pro shop, and other facilities will also generate tax revenue for the City. The project design includes a school site, parks, golf course, and other open space areas. • The project site was identified for potential future annexation in the 1988-1989 report by the City to the County and LAFCO, and in the updated report of September 1991. Eventual extension of utilities and ether infrastructure to the site appears to be feasible. The project represents development of land of lesser agricultural value and directs growth away from the agriculturally more valuable land to the east and south of the existing City limits. • The project will assist and facilitate the City's Capital Improvement Financing Program. (2) Applicant Objectives The Applicant has provided the following project objectives: • The project is a high-duality, mixed-use development consisting of commercial, residential, public, and open space uses that will benefit the existing citizens of ,Brentwood and enhance the general community. ,Specifically, the project will provide the following: ° A variety of quality recreational activities, including a site consisting of 40 percent open space. ® An attractively designed project that is harmonious with the existing aesthetic resources. Michael Paoli and Associates V-5 The project utilizes and enhances the existing, varied landscape. The distinct slope and character of different portions of the site provide diverse opportunities for the design and selection of housing types, styles, and price .ranges that will be reflected in the proposed residential villages and neighborhoods. ° The high-quality, mixed-use housing will offer a residential option not presently available in the Brentwood area. 6 The project will provide a harmonious transition to the surrounding property. ° The project will be compatible with the adjacent agricultural and residential uses. The project's golf course has been designed to complement and reflect the existing natural terrain of the land. The project site is the only property in the vicinity with the variety of character necessary to achieve all of both the City and the Applicant's goals. 2. 12ESCR1PT?ON QF SPECIFIC ALTERNATIVES a. No Project (1) Location, Design, and Population Characteristics Under the No Project alternative, the proposed project site could continue to be used for agricultural purposes (grazing and orchards). There would be no development or resulting population on the site. (2) Attainment of Project Objectives The No Project alternative could not feasibly attain the objectives of the proposed project. (3) Elimination or Reduction of Significant Environmental Effects The significant unavoidable adverse effects of the proposed project would not occur under the No Project alternative. There would be no loss of agricultural land or oaks trees, no impacts on the circulation system, no impacts on air duality, minimal use of nonrenewable energy resources, no change in views, and no loss of historic cultural resources. V-5 Michael Paoli and Associates (4) Environmentally Superior Alternative The No Project alternative is environmentally superior to the proposed project. It completely avoids all impacts associated with the proposed project. b. Existing General Plan (1) Location, Design, and Papulation Characteristics Under this alternative, the project site would be developed in accordance with the existing General Plan. Most of the site is currently designated for Agricultural Conservation, except for the northeastern approximately 80 acres, which are designated for Planned Employment Commercial (PEC) uses. According to the General Plan, the PEC designation allows for 51 percent of the land within a PEC area to be developed with employment-,generating uses and 49 percent 6f_ihe land to be developed with residential uses. The employment- generating uses within the PEC designation would be developed at an average Floor Area Ratio (EAP) of 0.25. Nonresidential uses within the PEC would include a mixture of research and development, office, light industrial, and related commercial uses. The residential uses would include a variety of housing types having an overall density of nine dwelling units per acre. Using a total PEC area of 80 acres, 40.8 acres (51 percent) would be developed with employment-generating uses and 39.2 acres (49-percent) would be developed with residential uses. At an average FAR of 0.25, 444,312 square feet of employment-generating uses could be constructed. At a density of nine units per acre, 353 housing units could be constructed, Based upon the City of Brentwood's population per household figure of 3.056, the 353 housing units would have a papulation of 1,078. It is likely that the PEC area would be designed so that the employment- generating nonresidential uses would be located in the eastern portion of the 80 acres, oriented toward the proposed Delta Expressway and Balfour Road. The residential uses would be located in the western portion of the 80 acres, buffered from the major roadways by the employment-generating uses. The 671 acres of the project site designated for Agricultural Conservation use would remain as grazing land. (2) Attainment of Project Objectives The Existing General Plan alternative could not feasibly attain the objectives of the proposed project. Michael Paoli and. Associates V-7 (3) Elimination or Reduction of ,Significant Environmental Effects All but one of the significant unavoidable adverse effects of the proposed project would not occur under the Existing General Plan alternative. Development of the PEC-designated area would result in the loss of 58 acres of orchard land, which is classified as Prime Farmland. However, there would be no loss of.oak. trees, as all of the trees are on the 671 acres designated for Agricultural Conservation use. This alternative would also not result in.a significant change in views. Impacts upon the circulation system and air quality would be reduced to a less than significant level through a reduction in trip generation from 31,200 trips per day to 7,200 trips per day. Use of nonrenewable energy resources would also be substantially lessened. No impacts to historic cultural resources would occur because these resources are not within the PEC area. (4) Environmentally Superior Alternative .Because it avoids all but one of the significant environmental effects of the project, the Existing General Plan alternative is environmentally superior to the proposed project. C. No Hillside Development and Reduced Number of Residential Units (1) Location, Design, and Population Characteristics This alternative has three variations. In Variation A, no development would be allowed on areas above 200 feet in elevation. This would, for the most part, eliminate development on the hillsides and ridge lines. A lesser number of housing units, the golf course, and the PEC area would be built in the relatively flat, lower elevation areas. Subtracting the acreage of the hill areas (about 270 acres) and the 80-acre PEC area from the 750-acre project site would leave approximately 400 acres for residential development and a golf course. The golf course would consume about half of the 400 acres, leaving approximately 200 acres for single family residential development. If the 200 acres were developed at the same single family residential density of the proposed project (excluding open space), 4.33 units per acre, 866 single family residential units could be built. The total number of residential units under 'Variation A, therefore, would be 1,219 (866 single family units plus 353 multiple family units in the PEC area). The buildout population of Variation A, at 3.056 persons per household, would be 3,725. The square footage of the employment-generating uses in the PEC area would be 444,312. V-8 Michael Paoli and Associates Variation B of this alternative would be the same as Variation A, except that no golf course would be included, as requested for evaluation by City staff. Without the golf course, the residential density of the project would be reduced to 2.17 units per acre but the number of single family units (866) would remain the same. Variation C would be the same as Variation A, except that 650 single family units would be built instead of 866. The 650 units represents a 25 percent. reduction in the number of units, as requested for evaluation in this alternative by City staff. The total number of units for Variation C, therefore, would be 1,003 (650 single family and 353 multiple family) with a population of 3,065. (2) Attainment of Project Objectives Variations A and C of this alternative could reasonably attain the objectives of the project. Variation B would not attain the objective of providing golf course recreational opportunities to residents of the project and the public. (3) Elimination or Reduction of Significant :Environmental Effects All variations of this alternative could avoid the loss of oak trees on the site and would substantially avoid the change in views caused by the development of bill areas. There would still be a significant loss of agricultural land. Traffic generation would be reduced substantially; however, impacts to regional roadways and regional air quality would remain significant. The loss of nonrenewable energy resources would remain significant. All variations of this alternative could be designed so that the historic cultural resources on the site are preserved. (4) Environmentally Superior Alternative All three variations of this alternative are environmentally superior to the proposed project because they avoid several of the significant impacts of the proposed project. d. Modifications Requested By Planning Commission (1) Location, Design and Population Characteristics This alternative has four components which can be incorporated into the project together or separately (see Figure V-1). These components are being considered at the direction of the Brentwood City Planning Commission. Component I would reorient the neighborhood commercial and low density cluster housing land uses shown for the 26-acre area bounded by Balfour Road, (new) Concord Avenue, and the east-west collector street (5 Drive). The land Michael Paoli and Associates V-9 uses would be reoriented so that the neighborhood commercial arca occupies the northern 14.7 acres and the cluster residential area occupies the southern 11.3 acres. This component would not result in any changes in number of units, papulation, or commercial square footage. The primary access to the shopping center, as rearranged, would be from Balfour Road rather than Concord Avenue. There would appear to be no significant advantage or disadvantage in orienting the uses either way. Component 2 would replace about 11 acres of the 16.7-acre park site (Clark . property and adjacent Spanos remnants) with the SF-5000 designation. Development of this property with single family residences instead of a park would result in an increase of 55 single family units. Replacement of the park site with residences would leave the project site with an inadequate amount of park acreage for its population, based upon General Plan standards (see Section R). Implementation of the mitigation measure specified in Sections F and U of providing a park site on the southeast knoll area of the project site (to preserve oak trees and the mine site), however, would allow the park acreage standard to be substantially met. Component 3 would designate an approximately 8-acre portion of the Assembly of God property west of new Concord Avenue for church use. Development of this property with a church and related facilities instead of SF-6000 single family residences would result in a reduction of 34 single family units. This appears to be an appropriate location for a church and related facilities because of its location on Concord Avenue and because it can serve as transitional use between adjacent Planned Employment Center uses and single family residential uses. Component 4 would realign new Concord Avenue so that it would become a frontage road adjacent to the proposed Delta Expressway. No appreciable changes in number of units or commercial square footage would result. Extension of the local street which divides the park site and the high density cluster residential area through the PEC area to existing Concord Avenue would provide for adequate access to these uses. If, however, a church and related facilities are placed on the SF-6000 property south of the school site, as proposed in Component 3, access to the church property would appear to be inadequate. The Concord Avenue alignment, as proposed in the project land use plan, provides a separation, or buffer, between the PEC uses and the residential uses to the west. 'Without Concord Avenue intervening, there would be a direct interface between the PEC area and the high density cluster residential area and between the PEC area and the SF-6000 (Component 3) property. This could lead to potential land use conflicts. V-10 Michael Paoli and Associates (2) Attainment of Project Objectives Under any or all of the components of this alternative, the objectives of the project could be attained. (3) Elimination or Reduction of Significant Environmental Effects None of the components of this alternative, taken individually or collectively, — would eliminate or avoid the significant environmental effects of the project. (4) Environmentally Superior Alternative This alternative would not be environmentally superior to the proposed project. e. Alternative Project Location (1) Location, Design, and Population Characteristics In order to identify an alternative site for analysis, a scoping process was undertaken to locate undeveloped land within the City's General Plan area which would have the potential to accommodate the project. The specific factors considered were as follows: • Is the acreage of the land sufficient to accommodate the project (at one location or divided among several locations)? • Is it feasiblefor the City of Brentwood to annex and provide urban services to the land? • Is the land within Contra Costa County's 65/35 Land Preservation Standard Urban Limit Line? • Can the site logically accommodate the planned uses and attain the basic land use and design objectives of the project? • Is the land proposed for development by others? The City's Planning Area was chosen as a reasonable boundary within which to consider alternative sites. Land outside the Planning Area to the east and south is generally Prime Farmland and beyond the County's Urban Limit Line. Land to the north of the Planning Area is either developed, broken up into small parcels, or proposed for development either as part of the City of Antioch or on unincorporated County land. West of the Planning Area, sloping terrain becomes prevalent and the land would be further from utilities and infrastructure than the proposed project site. Such land would be likely to result in greater development constraints and environmental problems than the project site. NUchaei Paoli and Associates V-1 I Figure V-2 indicates the land within the City's Planning Area that was considered in attempting to identify alternative sites for the project and the one site that was finally identified by the City as being a potentially feasible alternative site for the project. The figure also shows the City's Planning Area and Sphere.of Influence boundaries and areas proposed for development by others, based upon the City's Project Status Report map. The County's.Urban Limit Line generally runs along the City's eastern Sphere of Influence boundary and along its southern Sphere of Influence boundary as far west as Marsh Creek. Almost all of the undeveloped properties of sufficient size to accommodate the project are either proposed for development by others or beyond the Urban Limit Line. The remaining areas are either too small to accommodate the project or are broken up into too many parcels to be feasibly assembled for the project. The area identified as the .alternative site is comprised of about 470 acres generally located southeast of the intersection of Fairview Avenue and the EBMUD Mokelumne Aqueduct (see Figure V-2). This land is designated for Urban Low-Low Density Residential (up to three dwelling units per gross acre) by the Brentwood General Plan except for the small area west of Fairview Avenue, which is designated for Ranchette-Estate Residential (one dwelling unit per gross acre maximum). All but the portion of'the site located east of the Southern Pacific Railroad is within the City limits. For the alternative site analysis, only the 1,051 residential units and golf course from the Spanos portion of the project site would be developed on the alternative site. The 1,051 single family residential units would be less than the 1,282 units which would be allowed under the existing General Plan designations for the alternative site. The PEC portion of the proposed project would remain at the southeast corner of Balfour Road and Concord Avenue, where it would be developed in accordance with the existing General Plan (444,312 square feet of employment-generating uses and 353 multiple family dwelling units). A FEC area, school site, park site, and neighborhood commercial center were not evaluated on the alternative site because they are not designated for the site by the General Plan. (2) Attainment of Project Objectives The alternative site would appear to contain the acreage necessary to accommodate the single family residential and golf course portion of the proposed project. However, the alternative site is split by a railroad, two existing streets, and two planned thoroughfares. This would prevent the alternative site from being feasibly designed as a cohesive residential development with a golf course (see further discussion under Environmentally Superior Alternative below). Additionally, the Planned Employment Center uses V-12 Michael Paoli and Associates would be separated from the residential uses on the alternative site. For these reasons, the alternative site would not attain the objectives of the proposed project. (3) Elimination or Reduction of Significant Environmental Effects The entire 470-acre alternative site is classified as Prime Farmland according to . the Contra Costa County Important Farmland Map (Department of Conservation, 1388). In contrast, only 58 acres of the project site are designated as Prime Farmland. Development of the alternative site, therefore, would result in a greater lass of Prime Farmland. According to an EIR completed for the annexation of the majority of the alternative site to the City, development of the alternative site would not result in a significant loss of important vegetation and wildlife habitat (Donaldson Associates, 1990). The proposed project, in contrast, would result in a significant loss of oak trees. Development of the alternative site with 1,051 dwelling units and an 18-hole golf course would generate approximately 10,700 daily trips. Based upon the annexation EIR and the fact that the proposed 1,051 units would be less than the 1,282 single family residences allowed by the General Plan for the alternative site, it is likely that alternative site traffic on the adjacent street system could be mitigated. However, since significant impacts to regional roadways are predicted with or without the project, cumulative impacts on regional roadways would likely remain significant. Development of the alternative site would result in air pollutant emissions that would exceed the Bay Area Air Quality Management District's threshold of significance for regional emissions. Development of the alternative site instead of the project site would eliminate the significant visual impact resulting from development of the hill areas of the project site. The alternative site is flat agricultural land. The alternative site has been intensively farmed for many years and was not identified as having any significant cultural resources in the annexation EIR. Development of the alternative site would eliminate the potential loss of the significant historic cultural resources identified on the project site. (4) Environmentally Superior Alternative The alternative site would have advantages over the project site in that it is already designated for development by the General Plan, is substantially within the City limits, and would avoid significant impacts to biological, cultural, and visual resources. Michael Paoli and Associates 'VN 13 The alternative site also has a number of disadvantages. All of the 474-acre alternative site is Prime Farmland, as opposed to 58 acres of the project site. The alternative site is bisected by the Southern Pacific Railroad and crisscrossed by the existing and planned circulation system for the area. The railroad is a significant noise source and there are safety concerns related to the potential for railroad-related accidents. The-site is crossed by two existing north-south streets, Fairview and Minnesota Avenues. These streets are designated as thoroughfares in the General Plan. Additionally, the General Plan shows two future thoroughfare streets passing through portions of the alternative site. The planned extension of Sand Creek Road will pass in an east-west direction through the southern portion of the site and the extension of O'Hara Avenue will pass in a northwest to southeast direction through the portion of the alternative site east of the railroad. These roads will be sources of noise and would constrain site planning for residential uses and a golf course on the site. Based upon the above discussion, the alternative site is not considered to be environmentally superior to the project site. 3. AL TERNATIYE The State GEQA Guidelines require that the environmentally superior alternative be identified and that if the No Project alternative is identified as the environmentally superior alternative, a choice among alternatives must be made. Based upon the preceding, discussion, the No Project Alternative is clearly the environmentally superior alternative. It is the only alternative that completely avoids all impacts associated with the proposed project. Therefore, a choice among the remaining alternatives must be made. Among the remaining alternatives, the Existing General Plan alternative is superior. It would avoid all of the significant unavoidable impacts of the project except the loss of Prune Farmland. V-14 Michael Paoli and Associates SECTION W RELATIONSHIP BETWEEN SHORT-TERM USES AND LONG-TERM PROD CTIVITY/CUNIVLATIVE IMPACTS 1 . JNJRQDJJCT1QN The cumulative and long-term effects of the project which would adversely affect the state of the environment are discussed in Sections C through U. This section will describe the cumulative development scenario evaluated in the preceding sections and presents a summary of the significant cumulative environmental impacts identified in the sections. 2. The cumulative development scenario evaluated in the EIR was formulated by City staff in Spring 1991, and represents an aggregate of buildout projections for all traffic zones within the City's planning area (see Figure W-1). The buildout projections are based upon the fallowing: • For the traffic zones, or portions thereof, in which there was a known development proposal or approved but as yet unconstructed project, the number of residential units and/or nonresidential building square footage of the project or proposal was used. • For these areas in which there was no development proposal or approved project, development in accordance with the designations of the Brentwood General Plan was used. • For developed areas, the existing number of dwelling units and population for 1991 was used. Essentially, the cumulative development scenario approximates the buildout of the existing General Plan as modified by current development proposals. According to California Department of Finance 1991 estimates, the City of Brentwood has 2,788 dwelling units and a population of 8,255. Buildout of the cumulative development scenario would result in the development of an additional 13,664 dwelling units and a population increase of 41,757. (The 1991 Department of Finance population per dwelling unit figure of 3.056 for the City of Brentwood was used to calculate the population). The total number of dwelling units and population at buildout of the cumulative development scenario (adding existing units and population to proposed/planned units and population) would, therefore, be 16,452 dwelling units and 50,012 population. Michael Paoli and Associates W-1 E som � , 1 � ,m. #�#��■,,�.�„�■�� ININ i' ##: �m mm fhmm I= 22 � i~�� �► ii •t�lttlt" 'r ��;��>.®7 Ra � •� YSS��*a >��✓.v"��,�.f4.aE'0'now raw�ei ? °' •7f l,1,C1�!rRNA ��,.-....�� •�,�� {uf�Yf�' '�'` ' 7 t •'i.sstR��3S"+`>r ■ law NEI LEG INS PROJECr AREA Hancock Project fY;�ffrf � jr., .>. Brentwood Garin Ranch and Adjacent Properties PaoliA MAJOR PROJECTS a IN ! r and Associates Three major development proposals are included in the cumulative development scenario, in addition to the proposed project: Hancock, BlackhawkfNunn, and Garin Ranch. These projects are either proposed for development on land not currently designated for urban uses in the General Plan (Hancock and eastern half of Garin Ranch) or proposed development that is substantially different from the existing General Plan land use designations for their locations (BlackhawklNunn). The three projects are described below;-the location of each is shown on Figure W-1. • The Hancock proposal encompasses 433 acres located across Balfour Road immediately north of the project site, and proposes the development of 926 single family residences, an 18-hole golf course, a shopping center, and a school site, The Hancock property is within the General Plan area and the Sphere of Influence, but is not within the City limits. It is designated by the General flan for Agricultural Conservation uses. • The Blackhawk/Nunn (Brentwood Lakes) proposal is located on 369 acres east and northeast of the project site and proposes the development of 1,062 residential units and about 516,0001 square feet of employment- generating commercial uses. This property is inside the City limits and designated for planned Employment Center uses, The Garin Ranch property comprises 438 acres located generally east of downtown Brentwood, between Balfour Road and Sycamore Avenue. The site would be developed with 2,226 dwelling units, 12 acres of commercial uses and 8 acres for administrative school facilities, and 58 acres for park and storm drainage facilities. The vast majority of the site is outside the City limits and the eastern approximately one-half of the site is outside the Sphere of Influence. The eastern one-half of the Garin Ranch site is designated by the General Plan for Agricultural Conservation, while the western half is designated primarily for urban residential uses, 3. The potential significant adverse effects of the project as they relate to long-term cumulative conditions are summarized below. As noted above, these cumulative impacts are discussed in detail in Sections C through U. These sections also analyze potential mitigation measures for anticipated cumulative impacts. Agricultural Resources Pull development of the Brentwood General Plan and the projects considered in the cumulative analysis would result in the development of about 9,800 acres, a substantial portion of which is used for agricultural purposes and designated as Prime Farmland on the Contra Costa County Important Farmland Series Map N ichael Paoli and Associates W-3 (Department of Conservation, 1990). This is considered to be a significant unavoidable adverse impact (see Section D,-Agricultural Resources). i rnic Huxds The increased population resulting from buildout of the cumulative development scenario will be exposed to potential hazards from seismic activity. The Brentwood area could be impacted If a large earthquake were to occur on one of the active faults of the San Francisco Bay area. Because Brentwood is some distance from the major active faults of the Bay Area, the intensity of roundshaking felt in the Brentwood area would be less than in the Bay Area. Some of the smaller faults that run through the planning area have not been completely mapped and characterized as to their potential activity (see Section E, Topography, Geology, Soils, and Seismic Hazards). Biololzical..Roowr=s Development of the proposed project, together with all other projects considered under the cumulative development scenario, will result in the conversion of 9,840 acres of mostly agricultural open space to urban development. This conversion will result in a loss of existing plant communities and wildlife habitat, and the consequent loss or displacement of the wildlife dependent on the habitat. The type and quality of habitat that will be lost and the extent to which wildlife will be lost or displaced cannot be determined without a -comprehensive assessment of all land planned for development. Habitat which is at least minimally suitable for sensitive species, including the San Joaquin kit fox, the valley elderberry long-horned beetle, and the burrowing owl, will be lost. Moreover, there is the potential that additional oak trees will be lost to development (see Section F, Biological Resources). Traf g and 11ansl2grialion The traffic generated by cumulative development would have significant impacts on up to 33 intersections within Brentwood, upon regional roadways, and upon seven intersections in Antioch (see Section G, Traffic and Transportation). Air, QIjaIJIy The growth in population and vehicle use that will result from buildout of the Brentwood General Plan area in accordance with the cumulative development scenario will affect the emission of regional pollutants such as reactive organic gases and nitrogen oxides. Current projections are that regional emissions of these pollutants will decrease in the future, despite cumulative growth in population and vehicle use, due to regional programs for reducing emissions that are in place or currently being considered. Continued improvement in regional air quality is projected through the year 2000, although attainment of all air W-4 Michael Paoli and Associates quality standards throughout the entire Bay Area Air Basin is not projected by the year 2000 (see Section H, Air Quality). Significant increases in noise on Balfour Road and Concord Avenue would result due to the increase in traffic from cumulative development. Noise from traffic on the future Delta Expressway would also affect the project site (see Section 1, Noise), Buildout of the cumulative development scenario could significantly impact a number of public services and facilities related to storm drainage, water supply, wastewater collection and treatment, solid waste, law enforcement, fire protection, schools, parks and recreation, and gas and electricity (see Sections J, K, L, M, 0, P, Q, R, and S). n n w Development resulting from buildout of the Brentwood General Flan area in accordance with the cumulative development scenario would consume substantial amounts of nonrenewable energy resources such as gasoline, diesel fuel, and natural ,gas (see Section S, Energy Supply and Usage). A Scenic vistas afforded by the agricultural open space land in the Brentwood General Plan area will be lost as the land is developed with urban uses. Further, views that are aesthetically offensive to some may be created by the development. Cultural ResourcQs Since much of the General Plan area has not been systematically surveyed for cultural resources and since it is likely that previously unrecorded cultural resources exist, cumulative development in this area could adversely affect prehistoric and historic resources or areas with unique cultural values (see Section U, Cultural Resources). Michael Paoli and Associates "W-5 SECTION X irnrrr ri•rrwir�r rr - in i i i i n mu iii r SIGNIFICANT IRREVERSIBLE ENVIRONMENTAL CHANGES Nonrenewable resources which would be irreversibly used or committed during the initial and continued phases of the project include the following. • the loss of 58 acres of Prime Farmland and 693 acres of grazing land (see Section D); • the loss of oak trees (see Section E); * the use of fossil fuels, such as gasoline, diesel fuel, fuel for electrical power generation, and natural gas (see Section S); • the change in views caused by the grading and development of the hill areas (see Section T); • the use of construction materials (sand, gravel, petroleum-based products, metals, etc.). It is unlikely that the uses proposed for the project would be prone to accidents that would cause irreversible damage to the environment. Michael Paoli and Associates X-1 SECTION Y GROWTH-INDUCING IMPACTS 1 . 1J:B.Q1J U!Qt.1 4F.1.l r The purpose of this section is to evaluate the potential of the project to induce urban growth in its vicinity. The main factors influencing the potential for growth are public land use policy, availability of urban services, and any geographic or environmental constraints to growth in the project vicinity. The potential for the project to induce economic growth in the community is also discussed. 2. EUBLEC LAND USE PQLICX !QQNS1]2ERATQNS All but the .southern 100 acres of the 751-acre project site is within the Brentwood General Plan area. The General Plan area covers all land within the Brentwood City limits as well as unincorporated land outside the City that has been determined by Brentwood to bear a relation to its planning efforts. Although the vast majority of the project site is within the General Plan area, only the northeasterly 80 acres are within the City's Sphere of Influence and none of the site is within the existing City limits. The project site does, however, abut the City limits along a portion of its eastern boundary. The Brentwood General Plan designates all but the northeastern 80 acres of the project site for "AC" Agricultural Conservation use. The 80 acres in the northeast corner of the project site are designated "PEC" Planned :Employment Center, in order to provide job-generating uses adjacent to the future Delta Expressway. Project approval and ultimate development would require an amendment to the General Plan to change the land use designation of the site from Agricultural Conservation and Planned Employment Center to various urban designations, an amendment of the Sphere of Influence boundary, and annexation to the City of Brentwood. The act of redesignating the site for urban uses, amending the Sphere of Influence to include the site, and annexing, the site to the City may have a growth-inducing effect on adjacent properties to the south and west because the Sphere of Influence and City limits would be moved immediately adjacent to these properties. 'These properties are being considered for urban development as part of the City's General Pian update process. Michael Paoli and Associates Y-1 Properties to the north and east, however, would not likely be affected by changes in the Sphere of Influence and annexation of the project site. These properties are the subject of pending development proposals and are already within the City's Sphere of Influence. Land to the east of the site is also partially within the City limits. The project site is proposed to be removed from a Williamson Act contract. Land south of the site is under a contract which will expire in February 1996. Lands to the north, west, and east of the site are not under contract. The absence or pending cancellation of Williamson Act contracts in the project vicinity is a factor which may facilitate growth. The fact that the lands surrounding the site are generally held in large parcels and are not intensively farmed may also facilitate growth in the area. Contra Costa County has established a 66!35 Land Preservation Standard which limits urban development to no more than 35 percent of the land in the County and requires that at least 65 percent of all land in the County be preserved for agriculture, open space, wetlands, parks, and other non-urban uses. The standard is irriplemented by the County's Urban Limit Line, a boundary beyond which no urban uses can be designated. The proposed project and adjacent lands are within the Urban Limit Line and, therefore, are not an impediment to development in the project vicinity. 3. The urban services and infrastructure that are most fundamental in allowing urban development to take place are water service, sewer service, and street improvements. Without them, urban-level development cannot take place. Water and sewer service are currently unavailable in the project area. The closest water mains are at the intersection of Fairview Avenue and Dainty Avenue and the intersection of Balfour Road and !Minnesota Avenue, approximately one mile east of the site. Major water service improvements will be necessary in order to serve the project, including a new municipal well and two new, higher-elevation storage reservoirs. The nearest wastewater collection line to the project site is east of the intersection of Fairview Avenue and Balfour road, approximately one-half mile east of the site. This 18-inch line would need to be extended to the project site. Although this line would have the capacity to serve the project site, the wastewater treatment plant does not have the ability to handle the effluent generated by the site and would need to be expanded. The streets adjacent to the project site are two-lane, rural roadways. As noted in Section G, Traffic and Transportation, a number of street widenings, Y-2 Michael Paoli and Associates improvements, and intersection signalizations will be necessary to accommodate the traffic generated by the project. Extension of services to the project site and to the Hancock project to the north will be accomplished through the implementation of a Capital'Improvement Financing Program (CIFP). The Applicant, the Hancock project, Garin Ranch, and a number of other projects have agreed to participate in a CIFP (No. 91-1) to provide the necessary infrastructure improvements to accommodate urban development. The specific type and extent of improvements have not been determined for the CIFP. The Blackhawk/Nunn project, to the east of the site, is part of an earlier CIFP. Implementation of a CIFP, which would extend services and infrastructure and allow for urban-level development of the project site, could have a growth- inducing effect by making it easier to subsequently extend services to the rangelands to the west, south, and southeast. However, these lands would not be able to develop unless a new' CIDP was formed to include them. 4 . Geographic and environmental constraints to urban growth can include physical barriers such as a river or water body, floodplains, steep slopes, and nearby environmentally undesirable land uses, such as landfills, heavy industrial areas, railroads, or airports. bone of these constraints are apparent in the project vicinity, with the exception of steep slopes. The slopes may or may not constrain development, depending on the extent to which the City will allow grading for roads and lots. It should also be noted that the Davis Fault passes to the west of the project site, and building setbacks from the fault line may be necessary. 5. In addition to inducing urban growth in its vicinity, the project has the potential to induce economic growth in the community. This growth could come from at least two major sources. the temporary and permanent jobs that would be generated by the project and the demand for ,goods and services that would result from residents of the project. The permanent employment generated by the project, estimated at 1,456 jobs, together with the long-term temporary jobs resulting from construction activity, would represent a major new source of income in the Brentwood area. The, project would also generate an additional demand for retail goods and services in the Brentwood area. Some of this demand would not be met by the neighborhood-level shopping center proposed for the project site. For example, the ,estimated 4,957 residents of the project would ,generate a relatively significant demand for the comparison shopping opportunities that are typically found at community or regional shopping centers. This demand would not be NUch'ael Paoli and Associates Y-3 met on the project site but could be filled by existing or new centers elsewhere in the community. Likewise, the demand for service-oriented businesses, such as plumbers, printers, and automotive repair, would probably not be met on the site but could be filled by existing or new businesses at other locations in Brentwood. The project would be a major source of new housing and employment. Because of the limited amount of retail commercial development that is proposed, however, the project should not be a significant source of competition for existing retail and service centers and may actually enhance the business of these centers. Y-4 Michael Paoli and Associates APPENDIX C-3. PRELIMINARY BRENTWOOD GENERAL PLAN 'UPDATE LAND USE ELEMENT GrowthStrategy Goal 1: Provide for orderly, well-planned and balanced growth within the Brentwood Planning Area to the year 2020. Objective 1.1: Within the planning area, Brentwood should have a population of 73,000 to 107,000 at buildout. Objective 1.2: Create a diverse, self-sufficient community which offers a broad spectrum of job opportunities, housing types, community facilities and commercial area. Objective 1.3: -....Mariage the creation, location and type of development to ensure that: a) balance between jobs and housing is maintained, (b) adequate public services and facilities are available, (c) housing needs are being met, and (d) growth occurs in a manner acceptable to the community. Objective 1.4: Maintain City control of development within its planning area by: (a) establishing its Sphere of Influence coterminous with the urban boundaries established by the Land Use Map, (b) encourage early annexation of all lands within its Sphere of Influence. Objective 1.5: Develop a growth strategy which maintains local autonomy while operates in a regional context. Objective 1.6 The principal means of regulating new development shall be Planned Development Zoning or Specific Plans. Commu.ni Structure Gaal 2: Provide a community structure that clearly identifies the desired development pattern in Brentwood. Objective 2.1: Maintain Brentwood as a free-standing,community surrounded by foothills, farrnland and other open space. Land Use 12/12/91 Objective 2.2: Develop a community structure consisting of the following components: a) Sub-neighborhood b) Neighborhood C) Village d) City Objective 2,3: Protect and enhance the Downtown as the physical focal point of the community and its econotnic, cultural, and govenunental center, Jobs Housing Goal 3: Achieve a gobs housing; balance of .88= or 88 jabs for every 100 households. Objective 3.1: Designate the appropriate amount of land area for various employment generating uses. Objective 3.2: Ensure that an adequate inventory of vacant industrial/commercial land is maintained. Objective 3.3: Encourage extension of public utilities to Planned Employment Centers. Residential Development Goal 4: Preserve and enhance the high duality within existing; residential areas. Objective 4.1: Support rehabilitation and conservation of existing housing through redevelopment and other housing programs. Objective 4.2: Minimize disruption to existing neighborhoods which may be caused by adjacent new development or major public facilities. Potential Policies Lot sizes within new develoment shall be comparible with lett sires in adjacent existing developinent. The zoning ordinance shall be amended to include standards for buffer areas oii bats which contain two-story dwelling units. Land Use 12/12/91 Objective 4.3: Enhance the security of neighborhoods through City sponsored programs such as Neighborhood Watch. Objective 4.4: Provide municipal services (sewer, water, drainage, and-roads) to existing residences within the planning area. Potential Policies Require that construction of off and on-site facilities occur concurrent with development to eliminate impacts to facilties and services. Improvernent requirements and phasing of improvements shall be clearly specified through the development opprovol process or development ogreerntents for ever),project. Objective 4.5: Establish minimum and maximum,floor area ratios to regulate the intensity of development. Neighborhood Or arzation Goal 5: Encourage a neighborhood organization that promotes a high quality listing environment. Objective 5.1: Promote low density residential adjacent to open space or areas to remain in agricultural use and locate higher density residential development in proximity to activity nodes. Objective 5.2: Expand the range of single-family housing opportunities to provide for income groups of age categories, including housing suitable and affordable for individuals working in.B-rentivood. Objective 5.3: Residential development shall respond to the environmental setting, maintain open space and preserves the existing natural resources. Objective 5.4: Provide adequate park, open space and recreational facilities within each neighborhood. Objective 5.5: Providea diversity of housing types within each neighborhood. Objective 5.6: Provide safe and direct pedestrian linkages between residential areas and school sites, parks and community activity centers. Objective 5.7: Promote centrally located community activity centers within neighborhoods. Land Use 12/12/91 Objective 5.8: Ensure that new sub-neighborhoods are complementary and consistent in character to adjacent existing neighborhoods, Whsle neighborhoods shall be complementary, the design within nein development should create a distinct character within the new neighborhood. Objective 5.9. Design circulation system which promotes the integrity and quality of residential areas. Land Use 12/12/91 COMMUNITY STRUCTURE Cat.. t' No of Population Components Dwelfi She iJnits Sub-Neighborhood 50-150 140-450 Distinct housing type Served by local streets Mini-Parks Neighborhood 1,500 4,275 Neighborhood park Elementary school Convenience commercial Bounded by arterial streets Village 3,000-5,000 8,550-14,250 Intermediate school Commercial center anchored by supermarket Access to arterial street and highways Community facilities, day care centers, churches, clubs, etc. City 20,000 57,000 Conununity park High school Community and regional commercial Govemrnent center Employment uses Land Use 12/12/91 Commercial Development Gaal 6: Encourage the development or commercial land uses and the revitali7.ation of existing uses that strengthen the City's economic base and offer a range of commercial enterprises that serve the needs of residential and visitors. Objective 6.1: Retain Downtown as the community's central focal paint oriented towards specialty and community shopping; civic and cultural activities. Objective 6.2: Ensure that the mix of uses within the Downtown meets the shopping and service needs of the adjacent neighborhood. Objective 6.3: Limit retail commercial uses along the Delta Expressway to those which serve a regional market. Potential Policy: ' 'Businesses abutting the Delta Expressway shall provide aesthetically pleasing landscape buffers along the expressway frontage. Objective 6.4: Each village shall provide a shopping center anchored by a supermarket with supporting commercial to meet the shopping and service need of its residents. Objective 6.6: Allow small scale convenient neighborhood commercial uses at major intersections along thoroughfares to serve neighborhoods and reduce -traffic, air quality, and noise impacts. These centers are subject to locational criteria. Potential Policy: Small scale convenient neighborhood commercial shall be in occordence with the fallowing location criteria. a. Site area shall not exceed rine acre, b. No other existing or planned commercial area is located within on- half mile of the site. C. Site is located at the intersection of two thoroughfares. d. Commercial use is fecund compatible with the abutting land uses. e. The adjacent streets can accomodate commercial traffic without causing unacceptable ingestion or safety hazards. Objective 6.6: Improve the appearance of older cotninercial buildings and assist businesses through redevelopment programs. Objective 67: Ensure that commercial projects reflect the City's concerti for high quality Land use 12/12/91 development,ensures the provision of adequate infrastructure and avoid the appearance of strip development. Objective 6.8: Encourage the development of child care facilities u thin commercial development to provide a central location for the residents of Be&iN,00d to obtain seri,ices and com et:ience shopping. ObjecrA,e 6.9: Establish minimum and maximum floor area ratios to regulate the intensity of development. Land Use 12/12/91 IndustrialDevelopment Gaal 7: Provide for industrial development opportunities to diversi-f , Brentwood's employment tease and provide employment opportunities for City residents and the greater region. Objective 7.1: The development of Planned Employment Centers shall be the principle source of economic development and job creation. Potential Policies: Employment generating uses along the Delta Expressway should have the fallowing characteristics: a) High quality architectural and landscaping design. b) Average of 20 employees per acre. c) Outdoor storage or activities should not be allowed. Objective 7.2: Encourage new, clean employment-intensive industry to locate in Brentwood. Objective 7.3: Ensure that high quality industrial site and architectural design is achieved which addresses impacts to adjacent land uses. Objective 7.4: Provide a wide range of industrial uses within the planning area including business panes, light industrial and general industrial. Objective 7.5: Establish mu3i um and maximum fluor area ratios to regulate the intensity of development. Institutional Land Uses Goal 8: Ensure tate opportunity to develop institutional land uses. Objective 8.1: Provide for an adequate amount of institutional land uses to meet the social., economic, cultural, spiritual and education needs of the residents. Land Use 12/12/91 Open ,Staace and Agricultural bands Goal 9: Establish open space ureas within and around Brentwood that strengthen the definition of the community and reinforce the agricultural character. Objective 9.1: Utilize open space areas to minimize conflicts between adjacent land uses and provide for recreational opportunities within development. Objective 9.2: Establish visual corridors that maintain Ivicars of the surrounding countryside and significant natural features and provides viewsheds within developments. Porential Policies: Ensure the maximization of views to parks and golf courses through the development-review process. Develop height limits along the Delta Expressway to provide viers to the Brentwood and the surrounding countniside. Communities shall not be walled tiff from arterial and collector roodwati>s, instead, side-on treatment shall be utilized. Objective 9.3: Create open space areas in and around the community that preserve natural resources and agricultural lands. Objective 9.4: Maintain prime agricultural lands south of ECCITD main channel and east of Sellers Avenue and direct urban growth to the west and the north. Objective 9.5: Establish open space areas -protect the community from risks associated with flooding and other public, health and safety issues. Public Safety Coal 10: Locate land uses to ensure the safety of residents in Brentwood. Objective 10.1: Limit the intensity of development in areas exposed to geologic an/or flood hazards. FNDATA\PR0R3ATA\BU-02',GOA"-OS1V...a NDUSL•.GLS Land Use 12/12/91 APPENDIX F-1 REPRESENTATIVE BIOTA Representative Vascular Plants of the A. G. Spanos Planned Residential/Commercial Project and Vicinity, ,Brentwood, C.A. This partial listing is based on April through lune 1990 field studies; nomenclature is according to Munz (1959, 1968). FAMILY SCIENTIFIC NAME COMMON NAME Malvaceae Malva neglects Umbrella mallow Malva nicaeensis Nica`s malva Malva parviflora Cheeseweed Geraniaceae Erodium botrys Longbeaked storksbill Erodium circutariurn Redstemed storksbill Erodium moschata Musk filaree Cruciferae Brassica nigra Black mustard Capsella bursa.-pastoris Shepherd's purse Raphanus sativus Wild radish Sisymbrium officinale Hedge mustard Caryophyllaceae Silene douglasii Douglas' catchfly Stellaria media Chickweed Spergularia macrotheca Sand spurry Cactaceae Opuntia sp. Prickly pear Polygonaceae Rumex crispus Curly dock Euphorbiaceae Eremocarpus setigerus Turkey mullein Frankeniaceae Frankenia ,grandifolia Alkali herb Plantaginaceae Plantago lanceolata English plantain Asclepiadaceae Asclepias fascicularis Narrowleafed milkweed Convolvulaceae Convolvulus arvensis Field bindweed Solanaceae Datura meteloides Jimsonweed Solanum xanthi Purple nightshade Hydrophyllaceae Phacelia distans Common phacelia Boraginaceae Amsinckia intermedia Fiddleneck Plagiobothrys nothofulvus Popcorn flower Heliotropum curassavicurn Salt heliotrope Scrophulariaceae Orthocarpus densiflorus Owl's clover Orthocarpus purpurascens Owl's clover Labiatae Marrubium vulgare Horehound Stachys bullata Hedge nettle Rosaceae Prunus amygdalus Almond Rubus vitifolius Blackberry Leguminosae Lupinus latifolius Broadleafed lupine Lupinus succulentus Arroyo lupine Medicago polymorpha Bur clover Trifoliurn sp. Clover Fagaceae Quercus douglasi Blue oak Quercus lobata Valley oak Casuarinaceae Casuarina equisetifolia Beefwood Juglandaceae Juglans rejig x hindsii Black walnut Salicaceae Salix sp. Willow Moraceae Ficus carica Fig Loranthaceae Phorandendron tomentosa Greenleaf mistletoe Mehaceae Melia azedarach Chinaberry tree Clmbelliferae Conium maculatum Poison hemlock Foeniculum vulgare Fennel Rubiaceae Gallium aparine Bedstraw Caprifoliaceae Sambucus mexicana Elderberry Compositae Achyrachaena mollis Blow wives Agoseris apargioides Mountain dandelion Centaurea solstitialis Star thistle Cynara cardunculus Cardoon Grindelia camporum Great valley gumplant Lactuca serriola Prickly lettuce Matricaria mtricarioides Pineapple weed Senecio vulgaris Common butter~weed Silybum marianum Milk thistle Taraxacum offrnale Dandelion Xanthium strumarium Cocklebur Typhaceae Typha angustifolia Narrowleaf cattail Amaryllidaceae Brodiaea lana Grass nuts Brodiaea pulchella Blue dicks Cyperaceae Carex sp. Sedge Graminae Anthoxanthum odoratum Sweet vernal grass Avena, barbata Slender wild oats Avena fatua Wild oats Bromus mollis Soft brume Distichlis spicata Salt grass Festuca megalurs Foxtail grass Hordeum leporinum Hare barley Hordeum stebbensi Stebbens' barley Lolium multiflorum Annual ryegrass Poa pratensis Kentucky bluegrass 2 Representative Animals of the A. G. Spanos Planned Residential/Commercial Project and Vicinity, Brentwood, CA. Mammals, buds, reptiles, and amphibians identified either by direct observation or by other sign, March through June 1990. MA.NQV &LS QQmmo-nName ,Siler d-fic Name California Ground Squirrel Spermophilus beecheyi Valley Pocket Gopher Thonomys bottae California Vole Microtus californicus Harvest Mouse Reithrodontomys megalotus White-footed Deer Mouse Peromyscus maniculatus House Meuse Mus musculus Ornate Shrew Sorex ornatus Striped Skunk Mephitis mephitis Aubudon's Cottontail Sylvilagus audubonii Black-tailed Jackrabbit Lepus californicus Coyote Canis latrans Cat (feral) Felis domesticus BINDS Only common names are given for birds. The American Ornithological Convention has adopted standard names; consequently, scientific names are not necessary. Mallard Yellow-billed Magpie Killdeer Horned Lark Creat Blue Heron Bank. Swallow Great Egret Common Crow Turkey Vulture Scrub Jay American Kestrel Ash-throated Flycatcher Red-tailed Hawk Barn Swallow Black-shouldered Kite American Robin California Quail Savannah Sparrow Mourning Dove Sang Sparrow Rock Dove Lark Sparrow Barn Owl Red-winged Blackbird Great-horned Owl Starling Burrowing Owl Brewer's Blackbird Acorn Woodpecker Western Meadowlark Red-shafted Flicker Bullock's Oriole Anna's Hummingbird House Finch Western Flycatcher House Sparrow Western Kingbird 3 ANTHIBLANS AND REPTMES Bullfrog Rana catesbeiana Pacific Treefrog Hyla regilla Western Fence Lizard Sceloporus occidentalis Gopher Snake Pituophis melanoleucus 4 APPENDIX H-1 AIR QUALITY MODELS A. OALINE-4 MODELING The CALINE-4 model is a fourth-generation line source air quality model that is based on the Gaussian diffusion equation and employs a mixing zone concept to characterize pollutant dispersion over the roadway (California Department of Transportation, 1984). Given source strength, meteorology, site geometry, and site characteristics, the model predicts pollutant concentrations for receptors located within 150 meters of the roadway. The CALINE-4 model allows roadways to be broken into multiple links that can vary in traffic volume, emission rates, heighth, width, and other variables. The model's intersection mode, which distributes emissions along each leg of the intersection for free-flow traffic, idling traffic, and accelerating and decelerating traffic, was employed. The intersection made extended 250 meters in all directions. Receptors (locations where the model calculates concentrations) were located at a distance of 25 feet from the roadway edge for all four comers of the intersection. The worst case mode of the CALINE-4 model was employed. In this mode the wind direction is varied to determine which wind direction results in the highest concentration for each receptor. Emission factors were derived from the California Air Resources Board EMFAC-7EP model. Adjustments were made for vehicle mix and hot start/cold start/hot stabilized percentages appropriate to each roadway. Temperature was assumed to tae 40°F. The computation of carbon monoxide levels assumed the following worst-case meteorological conditions: Windspeed: 1 mps Stability: F Category Mixing Height: 1,000 meters Surface Roughness: 100 cm Standard Deviation of Wind 'Direction: 10 degrees The CALINE-4 model calculates the local contribution of nearby roads to the total concentration. The other contribution is the background level attributed to more distant traffic. The assumed 1-hour background levels were 4.4 PPM in 1991 and 3.1 PPM in 2005. 'These values were derived from published sources (BAAQMD, 1991). To generate estimates of 8-hour concentrations from the 1-hour CALINE results, a persistence factor of 0.7 was employed. B. URBEMIS-3 MODEL Estimates of regional emissions generated by project traffic were made using a program called UR.BENfiS-3. URBEMIS-3 estimates the emissions that would result from various land use development projects. Land use projects.can include residential uses such as single family dwelling units, apartments, and condominiums, and nonresidential uses such as shopping centers, office buildings, and industrial parks. URBEMIS-3 contains default values for much of the information needed to calculate emissions. However, project-specific, user- supplied information can also be used when it is available. The following parameters were used in the regional air quality analysis of the proposed project: -Ambient Temperature: 60°F -Trip Lengths: Home-Other: 5.3 miles Home-Work: 9.6 miles Dome-Shop: 3.7 miles Non-Howie Based Work: 8.6 miles Non-Home Based Non-Work: 5,6 miles -Year of Analysis: 2000 -Average Speed: 35 miles per Hour for all trip types 2 APPENDIX 1-1 ACOUSTICAL TERMINOLOGY AMBIENT NOISE LEVEL: The composite of noise from all sources near and far. In this context, the ambient noise leve constitutes the normal or existing level of environmental noise a a given location. CNEL; Comunity Noise Equivalent Level . The average equivalent sound level during a 24-hour day, obtained after addition of approximately five decibels to sound levels in the evening from 7:00 p. . to 10:00 p.m. and ten decibels to sound levels in the night before 7:00 a.m. and after 10.00 p.m. DECIBEL, dB-. A unit for describing the amplitude of sound, equal to 20 times the logarithm to the base 10 of the ratio of the pressure, which is 20 micropascals (20 micronewtons per square meter) . Ld,: flay-Night Average Sound Level . The average equivalent sound level during a 24-hour day, obtained after addition of ten decibels to sound levels in the night after 10:00 p.m. and before 7:00 a.m. Leqt Equivalent Sound Level . The sound level containing the same total energy as a time varying signal over a given sample period. Leq is typically computed over 1, 8 and 24- hour sample periods. Note: CNEL and Ld, represent daily levels of noise exposure averaged on an annual basis, while Lq represents the average noise exposure for a shorter time period, typically one hour. L,": The maximum sound level recorded during a noise event. Ln. The sound level exceeded "n" percent of the time during a sample interval . Lta equals the level exceeded 10 percent of the time (L90, Lsa, etc.) ACOUSTICAL TERMINOLOGY NOISE EXPOSURE CONTOURS. Lines drawn about a noise source indicating constant levels of noise exposure. CNEL abd` Ld„ contours are frequently utilized to describe community exposure to noise. SEL OR SENEL: Sound Exposure Level or Single Event Noise Exposure Level . The level of noise accumulated during a single noise event, such as an aircraft overflight, with reference to a duration of one second. More specifically, it is the time-intgrated A-weighted squared sound level for a stated time interval or event, based on a reference pressure of 20 micropascals and a reference duration of one second. SOUND LEVEL: The sound pressure level in decibels as measured on a sound level meter using the A-weighting filter network. The A-weighting filter de-emphasizes the very low and very high frequency components of the sound in a manner similar to the response of the human ear and dives good correlation with subjective reactions to noise. FEB B A APPENDIX 1-2 FH'VVA HIGHWAY TRAFFIC NOISE PREDICTION MODEL INPUTS ay ag t o % %Distri- Medium Heavy Speed Distance Scenario/Roadway ADT bution Trucks Tracks (m h) (Feet) Existing East of Minnesota Avenue 7,160 87/13 2.5 1.5 50 75 West of Minnesota Avenue 6,580 87/13 2.5 1.5 50 75 Existing lus Project Balfour Road: East of Minnesota Avenue 16,090 87/13 2.5 1.5 40 75 Brw. Minnesota/Concord 15,260 87/13 2.5 1.5 50 75 West of Concord Avenue 10,210 87/13 2.5 1.5 50 75 Concord Avenue: 15,170 87/13 2.5 1.5 40 75 Cumulative without Delta Expressway Balfour Road: East of Minnesota Avenue 15,140 87/13 2.5 1.5 40 75 Btw, Minnesota/Concord 19,640 87/13 2.5 1.5 50 75 West of Concord Avenue 16,270 87/13 2.5 1.5 50 75 Concord Avenue: 16,590 87/13 2.5 1.5 40 75 Cumulative with Delta Expressway Balfour Road: East of Minnesota Avenue 17,230 87/13 2.5 1.5 40 75 Btu. Minnesota/Concord 25,310 87/13 2.5 1.5 50 75 West of Concord Avenue 13,240 87/13 2.5 1.5 50 75 Concord Avenue: 17,480 87/13 2.5 1.5 40 75 APPENDIX U-1 GODDYEAWS SECOND REPORT (Taken from The coal mines of the Western Coast of the United States) Rancho Ike Los Nleganos On going still further to the east from here, there is for some distance hardly any exposure of the rucks at the surface, and there have never been any holes sunk until we reach the south-east quarter of section 22, and the north-east quarter of section 27, upon the rancho de Los Meganos, in township 1 north, range 2 east. Here there are known to exist at least three beds of coal of workable thickness associated w#th heavy deposits of a good quality of fire-clay. .A small shaft in the south part of section 22, known as the "Hoisting Shaft," and eighty-eight feet in depth, shows the fallowing section of the strata, the measurements being vertical, and beginning at the top or mouth of the shaft. Feet Inches Clay and clayey material................................................................... 34 4 Black clay............................................................................................... 14 8{ Coal.....•. .... ......•.................•............................................•................... 2 4 Coalclay, hard and somewhat sandy....................................... 4 8 Coal ..< ...... ..................................................•.......................................•. 0 4 Bluefire-clay...........................................?,!.w....i.................................. 5 0 Coal ........ ................................................................................... ......... 3 6 Clay (with three regular coal-seams, about one foot 8 0 thickeach)............ ............................................................................. Coal..•....................•.................................................................................. 7 d {C�{l(''ay........................................................................................................... 3 (0Jy {�.\�oal .......•............•......................•.............................................................. 1 (I/w�]✓ lay.......................................................................................................... �4 0 There has been mined here, chiefly from the "7 foot" and the "31/2 foot" beds, through shallow slopes and shafts, without the use of ether power than that of hand and horse, an aggregate of probably somewhere between five thousand and ten thousand tons of coal, most of which has been used under the boilers at the "Engine Shaft." The general course of strike of the beds here is about N. 720W. magnetic, and their dip to the north-east, but so far as yet explored somewhat variable in amount, ranging from 160 to 260 at different points. The "Engine Shaft" is sunk at a paint about eleven hundred feet north- easterly from the line of outcrop of the beds, is about three hundred and eighty feet deep, and is divided into three compartihents, two hoisting and one pumping, each compartment being 8 ft. X 5, ft, clear inside of timbers. The shaft is well timbered and is a good piece of workmanship. At its bottom there is�a seven-foot bed of coal upon which a gangway was driven west in 1888, to a distance of two hundred and seventy-five feet from the shaft. No gangway was ever driven east from the shaft, and the font of the shaft itself is in a fault which appears to be an up-throw to the east, of considerable magnitude. Very little coal was ever rained from here, and what was taken out was burned under the boilers at the shaft. The quantity of water to handle here was pretty large, and the shaft was furnished with a Cornish pump, the pumping engine having a 22-inch cylinder with 48-inch stroke, and being geared 4 to 1. The hoisting engine has a 16" X 48",cylinder and is geared 3 to 1. It was but a few months after reaching the coal at the font of this shaft, when, the company which awned the property getting into financial trouble, the work was suspended, and the shaft allowed to fill with water. Since that time it has been once again pumped out, and kept clear of water for a month or two, when, owing to similar causes, it was again allowed to refill. And in this condition it has remained up to the present time, the water standing about forty feet below the mouth of the shaft. It is believed by Mr. R. F, Lord, the engineer in charge of this property since 1871, as well as by Mr. Clarence King, mining geologist, who made a report upon it in 1874, to Mr. S. E. Lyon of New York, that the seven-foot bed at the foot of the engine shaft is entirely a different and separate bed from any of those upon which any mining has been done In the shallow workings near the outcrop, and that the latter beds, denominated by King the "Lord Series," underlie the former, the vertical thickness of the strata between the upper and lower seven- foot beds being supposed to be about one hundred and twenty-five feet. But while this theory is not a ,priori particularly improbable, it is yet far from being proven to be true, and it is based upon facts which, after a recent careful examination of the ground by myself, and with my experience of over nine years of intimate acquaintance with the coal mines of the Mt. Diablo region, I consider to be of very questionable import, and of little value. It would be nothing wonderful if this seven-foot bed at the foot of the engine shaft (which bed consists, by the way, of three distinct benches of coal, separated from each other by two layers of clay-slate a few 2 inches each in thickness), should eventually turn out to be identical with, and at this depth the only representative of, the whole series of beds which has been called the "Lord Series." But it is a question upon which the paucity and the doubtful significance of existing developments render speculation idle, and which additional underground explorations alone can finally settle, Whatever the fact may prove to be, however, in this respect, there can be no question in any case that the quantity of coal in the Rancho de Leas Meganos is great. And, though l have never seen any coal in this property which was quite so hard or which would bear handling and transportation so well as the average of the Mt. Diablo coal, nevertheless, as it can be cheaply reined and cheaply sold, there is goad reason to believe that it will pay to open up and work this urine, so soon as the property shall be freed from legal complications and a clean title shall be vested in some party who has both the money and the intelligence which it will certainly require to handle it properly. With the Rancho de Los Meganos, the Mt. Diablo coal field may be said to terminate, no explorations to the east or south-east of here having ever developed anything in the shape of coal worth mentioning until we came to another field, viz., 3 APPENDIX 1 AUTHORS OF EIR This Draft Environmental Impact Report was prepared for the City of Brentwood by: Michael Paoli and Associates Environmental, School Facility, and City Planning 600 'West Shaw Avenue, Suite 240 Fresno, California 93704 (209) 224-4806 • Michael P. Paoli, Project Director • Scott B. Odell, Project Manager • Linda Dick Bissonnette, Cultural Resources Planner • Julie`I :Hammonds, Planner • Laurie 1. Akbar, Report Production Specialist The biological section was prepared by: William P. Jordan, Ph.D, and R. James Brown, Ph.D. University of Sart Francisco San Francisco, CA 94117 (415) 666-2352 The traffic and transportation section was prepared by: INKS Associates 1956 Webster Street, Suite 300 Oakland, CA 94612 (415) 763-2061 The air quality section was prepared by: Don Ballanti, Certified Consulting Meteorologist 1424 Scott Street El Cerrito, CA 94530 (415) 234-6087 The noise section was prepared by: Brown-Buntin Associates, Inc. 319 W. School Avenue Visalia., CA 93291 (209) 627-4923 APPENDIX 2 SOURCES CONSULTED ALTERNATIVES j2QQtamentation Donaldson Associates. Draft EPR for Minnesota Avenue Annexation. 1990. Par anal 0mmul3i a n Jackson, Mark, Assistant Planner, City of Brentwood. Letter and telephone communication. October and November 1991. AIR QUALITY Documentation Bay Area Air (duality Management District (BAAQMD). Bay Area `91 Clean Air Plan (CAP). Volume 1. October 1991. Bay Area Air Quality Management District. Air Quality and Urban Development-Guidelines. November 1985 (Revised April,1991). California Air Resources Board. California Air Quality Data Annual Summary. Vols. XX-XXTI. 1988-1990. California Department of Transportation. CAL1NE-4----A Dispersion Madel for Predicting Air Pollutant Concentrations Near Roadways. Report No. FTWAICA[M-84-15. 1984. a— U. S, Environmental Protection Agency. Compilation of Air Pollutant Emission Factors, Volume 11.' Mobile Sources. AP-42. Fourth Edition. 1985. AGRICULTURAL RESOURCES D„oumentation Agricultural Preserves, Contra Costa County (map) California, State of, Department of Conservation. Contra Costa County Important Farmland Map. July 1988. California, State of, Department of Conservation, Farmland upping and Monitoring Program, Important Farmland Map Categories. 1988. California, State o , Department of Conservation, Farmland Mapping and Monitoring Program. Suit Candidate Listing for Prime Farmland and Farmland of Statewide Importance in Contra Costa County. July 1991. Contra Costa, County of. Centra Costa County General Plan 1990-2005. January 1991. Contra Costa, County of, Department of Agriculture. 1990 Contra Costa County Agricultural Report, The Planning Center. City of Brentwood General PlanlEIR - Existing ConditionslBaseline Data Report, March 1991. U. S. Department of Agriculture, Soil Conservation Service. Soil Survey of Contra Costa County. September 1977. Pena?C.om. ainigalion Stout, Laurie, Agricultural Biologist, Centra Costa County, Department of Agriculture. Telephone communication. August 1991. , Edwards, Doug, Fresno County, Department of Agriculture. 'Telephone communication. August 1991. BIOLOGICAL RESOURCES Documentalion Barbour, M. G. and J. Major. Terrestrial Vegetation of California. New York, Johan Wiley and Son.. 1977. Bolsinger, C. L. The Hardwoods of California's Timberlands, Woodlands and Savannas. Forest Service, U. S. Department of Agriculture. Resources Bulletin PNW-RB-148. 1988. Ingles, L. G. Mammals of the Pacific States. Stanford University Press. 1965. Jensen, C. San Joaquin Kit Fox Distribution. U. S. Fish and Wildlife Service, Bureau of Sport Fisheries and Wildlife, Sacramento, California. Special Report. 1972. 2 Laughrin, L. San Joaquin Kit Fox: Its Distribution and Abundance. California Department of Fish and Game, Wildlife Management Branch Administrative Report No. 70-2. 1970. Manz, P. A. A California Flora. Berkeley, California: University,of California Press. 1965. Munz, P. A. Supplement to A California Flora. Berkeley, California: University of California Press. 1968. Niehaus, T. F. and C. L. Ripper. A Field Guide to Pacific States Wildflowers. Boston: Houghton Mifflin Company. 1976. Peterson, R. T. A Field Guide to the Western Birds. Boston: Haughton Mifflin Company, 1951. Smith, J. P. (ed.). Inventory of Rare and Endangered vascular Plants of California. Special Publication No. 1 (4th Edition). California Native Plant Society, Berkeley. 1988. Stebbins, R. C. A Field Guide to the Western Reptiles and Amphibians. Boston: Houghton Mifflin Company. 1956. Swi,ck, C. D. Determination of San Joaquin Kit Fox Runge in Centra Crista, Alameda, Sari Joaquin and Tulare Counties. California Department of Fish and Game. Project -54-R-4. 1973. U. S. Fish and Wildlife Service. Guidelines for Preparing Biota Reports, Attachment C. Loose leaf publication. 1988. U. S. Fish and Wildlife Service. Results of Surveys for San Joaquin Kit Fox Conducted in Southeastern Contra Costa County, 1978-1991. 1991. University of California Cooperative Extension. Living Among the Oaks: A Management Guide for Landowners. Berkeley. Undated Publication. WPM Planning Team, Inc. vegetation and Wildlife Study for the Southwest Brentwood Specific PlanlEIR. 1988. Lehman, B., U. S. Fish and Wildlife Service, Endangered Species Office, Personal Communication. February and June 1990. Negano, C., U. S. Fish and "Wildlife Service, Endangered Species Office. Personal Communication. June 1990. 3 CUL'T'URAL RESOURCES DocumtAd Antioch Ledger. Antioch Centennial Ledger, 1851-1951. Antioch,"California: Antioch Daily Ledger, Section of Vol. LXXXI, No. 130. 1951. Benham, Calhoun. Brief for John F. Williams on •a motion to dismiss the proceedings in bankruptcy, heard June 17, 1876 in the southern district court of New York. New York: Douglas Taylor Law Book and Job Printer. 1876. Brentwood, City of. Brentwood General Plan. City of Brentwood, Community Development Department. 1983. California Legislature. Appendix to the journals of the Senate and Assembly of the twenty-sixth session of the Legislature of the State of California, Volume IV. Sacramento: State Printing Office. 1885. California, State of, Department of Natural Resources, Division of Mines. California Journal of Mines and Geology. Mines and Mineral Resources of Contra Costa County, prepared by Fenelon F. Davis and James W. Vernon. 1951. California State Mining Bureau. Eighth annual report of the state mineralogist for the year ending October 1, 1888. Sacramento: State Printing Office. 1888. Contra Costa, County of. Contra Costa County General flan, 1990-2005. Martinez: Contra Costa County Community Development Department. 1991. Daily Gazette. Thirteen thousand acres involved in suit filed: Rancho Los Meganos. Martinez: Daily Gazette. June 13, 1908. 1908. Emanuels, George. California's Contra Costa County: an illustrated history. Walnut Creek: Diablo Books. 1989. ENGEM, Incorporated. Report to A. G. Spanos Company, Stockton, California on the additional coal mine exploration for Brentwood golf course development, Brentwood, California. October 15, 1990. (N90-2832-H4). 1990. Francis, J. D. Coal mining—an outmoded California industry. pp. 40-43. [excerpt from a book, circa 1937) (Department of Special Collection, Woodward Collection Pamphlet File, Henry Madden Library, California State University, Fresno). 4 Goodyear, W. A. Detailed description of the Monte .Diablo Coalfield, April 1870 in Appej3dix. Cambridge, Mass.: John Wilson & Son, University Press, 1882. 1870. Goodyear, W. A. The Coal Mines of the Western Coast of the United States. San Francisco: A. L. Bancroft & Company. 1877. Griffin, A. R., B.A., Ph.D., M.B.I.M. Coalmining. London: Longman Croup Limited. 1971. Hughes, David. Welsh People of California, 1849-1906. San Francisca: R. D. Reed, R & E Research Associates (reprint). 1969. Lard, R. F. Reports on the Rancho de Los Meganos and its coal field in Contra Costa County, California. New York: J. Polhemus. 1881. (cited in Napton 1991). Lyman, George D. Jahn Marsh, Pioneer: The Life Story of a Frail-Blazer on Six Frontiers, New York: Charles Scribner's Sons. 1940. Macfarlane, ,fames. Coal Regions of America. New York: Appleton. 1873. McBrien, J. P., Contra Costa County Administrator. National Register of Historic Places inventory----nomination farm for the Jahn Marsh Home, Marsh Creek Road, Centra Costa County, California. Prepared for Historic American Building Survey No. 7-14, Ca. 1500, and Western Heritage, Inc. 1971. Napton, L. Kyle, Ph.D. Cultural Resource Investigation of the Proposed Brentwood Country Club Elle, 630 acres in Contra Costa County, California. March 1990. Prepared for Michael Paoli and Associates by California State University, Stanislaus Institute for Archaeological research. 1990. National Park Service (NPS). History and Prehistory in the National Park System and the National Historic 'Landmarks Program. Washington, D. C.: History Division, National Park Service. 1987. Oakland Tribune. Eastbay Coal Mines Recall Early Era. Oakland: Oakland Tribune. Sunday, January 21, 1973. Praet eellis, Adrian. National .Register of Historic Places registration Farm for Blau Diamond Mines (Regional Preserve), Sumersville Road, Antioch. Prepared by the Anthropological Studies Center, California State University, Sonoma, May 20, 1989. 5 Purcell, Mae Fisher. History of Contra Costa County. Berkeley: The Gillick Press. 1940. Slocum, W. A. history of Contra Costa County, California including its geography, geology, topography, clirnatography and description...San Francisca: W. A. Slocum & Co. 1882. Sullivan, Raymond and John Waters. History of Mount Diablo Coalfield, Centra Cosh County, California. California Geology. March 1980. Whitney, J. D., State Geologist. Report of progress and synopsis of the field- work from 1864 to 1864 in Geological Survey of California, Geology, Volume I. Sacramento: State printing Office. 1866. Young, Otis E., Jr. Black Powder and Land Steel: Miners and Machines on the Old Western Frontier, Norman: University of Oklahoma Dress. 1975. Eersoal Communication Arrendondo, Dorothy, National Register Unit, California Office of Historic Preservation, Sacramento. Bonnickson, Barbara., Brentwood Historical Landmarks Committee. Hardwick, Bonnie, Bancroft Library Manuscripts Department. Jackson, Mark, Assistant Planner, City of Brentwood. Lamb, Sylvia. Bender, California Division of Mines & Geology. Maffei, Betty, Contra Costa Historical Society. Napton, L. Kyle. Ph.D., California State University, Stanislaus Institute for Archaeological Research. Parent, Traci, Black Diamond Nunes Regional Preserve. Pierce, Vose, East Contra Costa Historical Society. Pombo, Ernest, former property owner, Tracy. Praetzellis, Adrian, Senior Historical Archaeologist, Sonoma State. Stein, Louis, amateur historian, Berkeley. Waters, John, Black Diamond Mines Regional Preserve. 6 pdej ViAijed Black Diamond Mines Regional Preserve Museum, Antioch. California State Office of Historic Preservation, Sacramento. California State University, Fresno, Henry Madden Library, inclining the Special Collections and Map Departments. Contra Costa County Historical Society, Pleasant Hill. Contra Costa County Recorder's Office, Martinez. East Contra Costa Historical Society Byer NO House Museum, Brentwood. ENERGY SUPPLY AND USAGE Documn bort The Planning Center. City of Brentwood General Plan1EIR - Existing ConditaonslBaseline Data Report. March 1991. Reid, Lisa, Planner, Pacific Gas and Electric Company. Telephone communication and letter. August-September 1991. Pitman, John, Gas Engineer, Pacific Gas and Electric Company. Telephone communication. November 1991. i FIRE PROTECTION AND EMER ENCY SERVICES 12"uMenlation The Planning Center. City of Brentwood General 'lanlEIR - Existing ConditionslBaseline Data Report. March 1991. P Balt, Dennis, Vice President, Regional Ambulance Company. Telephone communication. September 1991. Clam, John, Assistant Chief, Brentwood Fire Department. Telephone communication. August 1991. 7 Hine, Paul, Chief, Brentwood Eire Department. Telephone communication. September 1991. HAZARDOUS CONDITIONS Pocumentakm. California Public Utilities Commission, in cooperation with the, California Department of Health Services. Potential health Effects of Electric and Magnetic Fields from Electric Power Facilities. Report to the California State Legislature. September 1989. ENGEO. Level One Environmental Site Assessment of the Sciabica Property. March 1990. ENGEO. Level One Environmental Site Assessment of the Spanos Site. June 1989. Leonard, Alvih, Dr., et. al. Electric and Magnetic Fields, Measurements and Possible Effects on Human Health. Special Epidemiological Studies Program, California Department of Health Services. 1990. Morgan, granger, Professor. Electric and Magnetic Fields from 60 hertz Electric Power: What'do we know about possible health risks? Department of Engineering and Public Policy. Carnegie Mellon University. 1989. Berry, Marc, Associate Distribution Engineer, Pacific Gas and Electric Company. Telephone communication. September 1991. Billow, Pete, Cas Engineer, Pacific Gas and Electric Company. Telephone communication. September 1991. Simpson, male, Chairman of the Land Group, Pacific Gas and Electric Company. Telephone communication, October 1991. LAND USE erne taati n Association of Bay Area Governments (ABAG). Projections '90. 1989. Association of Bay Area Governments (ABAG). Regional Plan 1980. 1980. 8 Brentwood, City of. Brentwood General Plan. City of Brentwood, Community Development Department. 1983. Brentwood, City of, Project Status Report. .Tune 1991. Contra Costa, County of. Contra Costa County General Plan 1990-2005. January 1991. The Planning Center. City of Brentwood General PlanlEIR - Existing ConditionslBaseline.Data Report. March 1991. P Jackson, Mark, Assistant Planner, City of Brentwood. Telephone communication. October and November 1991. Newhart, Laird, Land Planning Consultants. Telephone communication. December 1991. PARKS AND RECREATION Qxum'njajign Brentwood, City of. Brentwood General Plan. City of Brentwood, Community Development Department, 1983, The Planning Center. City of Brentwood General PlanlEIR - Existing ConditionslBaseline Data Report. Larch 1991. LAW ENFORCEMENT Documen , tion Brentwood, City of. Brentwood General Plan. City of Brentwood, Community Development Department. 1983. The Planning Center. City of Brentwood General Plan/EIR - Existing Conditions/Baseline Data Report. March 1991. m Frank, Fames A., Chief of Police, Brentwood Police Department. Telephone communication and letter. August and November, 1991. 9 SCHOOLS Dwimentatign The Planning Center. City of Brentwood General Plan/EIR, - Existing Conditions/Baseline Data Report. March 1991. P r ai Qgmmunicaticn Adams, Doug, Superintendent, Brentwood Union School District. Telephone communication. August 22, 1991. Drake, Darlene, Executive Secretary to the Superintendent. Telephone communication. August 1991. Jackson, Mark, Assistant Planner, City of Brentwood. Telephone communication. January 1992. Newhart, Laird, Land Planning Consultants. Telephone communication and letter, February (in response to NOP on behalf of Liberty Union Nigh and Brentwood Union School Districts), August, and November 1991. SOLID WASTE Doc .11tation The Planning Center. City of Brentwood General Plan/EIR - Existing ConditionslBaseline Data Report. March 1991.. Persopal Commuuicalion Brennan, Dave, Assistant City Manager, City of Brentwood. Telephone communication. August and September 1991. Garaventa, Sil, Vice President, Concord Disposal Service. Telephone communication. November 1391. Zahn, Charles, Assistant Director of Centra Costa County, Community Development Department. Telephone communication. August 1991. STORM DRAINAGE AND FLOOD CONTROL DocumentatiQ Contra Costa County Flood Control and Water Conservation District. Draft Environmental Impact Report for Marsh Creek Regional Drainage Plan. March 1990. 10 Centra Costa County Flood Control and Water Conservation District. Marsh Creek Watershed Hydrology Report. 1989. Eersual Communication Kent, Ulf, Contra Costa County Flood Control and 'Water Conservation District. Telephone communication. November 1991. Kersevan, Steve, Centra Costa County Flood Control and Water Conservation District. Telephone communication. November 1991. TOPOGRAPHY, GEOLOGY, SOILS, AND SEISMIC HAZARDS Dgggmentmiort Anderson Geotechnical Consultants, Inc. Geologic Report on the General Plan Update of the'City of Brentwood. December 1990. Contra Costa, County of. Contra Costa County General Plan. Seismic Safety Element. 1986. ENGEO. Additional Coal .Mine Exploration. October 1990. ENGEO. Additional Preliminary Geotechnical Exploration for Groundwater and Liquefaction Considerations. October 1990. ENGEO. Coal Mine Exploration Summary. February 1991. ENGEO. Environmental Assessment of the 57.68 Acre Sciabica Parcel. October 1990, ENGEO. Level One Environmental Site Assessment of the Sciabicca Property, March 1990. ENGEO. Level One Environmental Site Assessment of the Spanos Site. June 1989, ENGEO. Seismic Hazard Fault Study. December 1990. ENGEO. Seismic Lazard Fault Study. October 1990. McNutt, Stephen, California Department of Conservation, Division of Mines and Geology. Summary of Damage and Losses Caused by the Lorna Prieta Earthquake. 1990, it United States Department of Agriculture, Soil Conservation Service. Soil Survey of Contra Costa County. 1977. Wesnousky. ,earthquakes, Quaternary Faults, and Seismic Lazard in California. Journal of Geophysical Research. Vol. 91, No. B12. TRAFFIC AND TRANSPORTATION r Brentwood, City of. Capital Improvements Facility Plan FIR. Section 4.2. 1988. Contra Costa., County of. Contra Costa County General Plan, 1990-2005, draft, October 1990, and Draft Environmental Impact Report. Institute of Transportation Engineers. Trip Generation. 5th Edition. January 1991. Transportation Research Board. Special Report 209, Highway Capacity Manual. 1985. Transportation Research Board. Transportation Research Circular 212. 1980. Personal ommunicadga Vosicka, Charles, Project Manager, City of Brentwood. Telephone communication. January 1992. WASTEWATER COLLECTION, TREATMENT, ANIS DISPOSAL Dma-mentation Dewante and Stowall. City of.Brentwood ultimate Sanitary Master Plan. 1989. Nolte and Associates. City of Brentwood Infrastructure Master Plan Wastewater Treatment Final Report. March 1991. The Planning Center. City of Brentwood General Plan/EIR - Existing ConditionslBaseline Data Report. March 1991. Raumal CQmmunication Stedman, James, Stedman and Associates, Inc. Telephone communication. November 1991. 12 Vo'sicka, Charles, Project Manager, City of Brentwood. Telephone communication. January 1992. WATER SUPPLY D=mntation Brentwood, City of. Draft City of Brentwood Yater Supply Study. September 1990. The Planning Center. City of Brentwood General PlanlEIR - Existing ConditionslBaselne Data Report. March 1991. Personal Commu igat on Stedman, James, Stedman and Associates, Inc. Telephone communication. November 1991. Vosicka, Charles, Project Manager, City of Brentwood. Telephone communication. January 1992. 13