HomeMy WebLinkAboutMINUTES - 08061991 - 1.35 TO: BOARD OF SUPERVISORS, as governing Board of Sanitation District No. 15
FROM: J. MICHAEL WALFORD, CHIEF ENGINEER
DATE: August 6, 1991
SUBJECT: Approve Lift Station Monitoring System Project, Sanitation District No. 15, Bethel Island
Sanitary District 15Z4, Project #7392-6X9E76, CP #91-58
SPECIFIC REQUEST(S) OR RECOMMENDATION(S) &BACKGROUND AND JUSTIFICATION
I. Recommended Action:
APPROVE Project and DETERMINE that the project is a CEQA Class la Categorical
Exemption.
DIRECT the Director of Community Development to file a Notice of Exemption with the County
Clerk.
DIRECT the Chief Engineer to arrange for payment of the $25.00 handling fee to the County
Clerk for filing of the Notice of Exemption.
II. Financial Impact:
The $162,000 estimated project cost will be funded by Sanitation District No. 15 Zone 4.
III. Reasons for Recommendations and Background:
Sanitation District No. 15 Zone 4 is responsible for the operation and maintenance of eighteen
sewage pumping stations. Each station contains two electrical motor driven pumps. The
pumps are currently controlled solely by mechanical sensors at each site. All eighteen sites
are connected to a sewage overflow warning system that is monitored by the Bethel Island Fire
Station staff on a voluntary basis and by staff at the Oakley-Bethel Island Treatment Plant.
Continued on Attachment: SIGNATURE: i/
_ RECOMMENDATION OF COUNTY ADMINISTRATOR
_ RECOMMENDATION OF BOARD COMMITTEE
APPROVE OTHER
SIGNATURE(S):
ACTION OF BOARD ON A U G 6 1991 APPROVED AS RECOMMENDED OTHER
VOTE OF SUPERVISORS
✓ UNANIMOUS (ABSENT )
AYES: NOES:
ABSENT: ABSTAIN:
MFK:Iv
a:B06.t8
Orig. Div: Public Works (AD) I hereby certify that 11116 Is a fNa and Correct Copy Of
cc: County Administrator an action taken and entered On the MInutea Of the
GMEDA Board of supervisors on the date shown.
Community Development AUC 6 1991
County Counsel ATTESTED'
Auditor Controller PHIL BATCHELOR,Clark of the Board
Sanitation District No.15 Advisory Board(via PWD) of Supervisors and County Administrator
Oakley Sanitary District(via PWD)
Public Works Director By .wi _ i as i _ . Do"
Engineering Services
Accounting
Lift Station Monitoring System, BI
August 6, 1991
Page Two
Oakley Sanitary District operates the Sanitation District No. 15 facilities for the County under
an operations and maintenance contract. Oakley Sanitary District is purchasing a computer
driven sewage lift station remote alarm/control system for their own lift stations and several
pieces of equipment operated by the Oakley-Bethel Island Wastewater Management Authority.
The District has strongly recommended that the antiquated alarm system for the Sanitation
District No. 15 Zone 4 facilities be replaced with new radio control sensors compatible with their
proposed computerized-remote control system.
Oakley Sanitary District staff has met with the Sanitation District No. 15 Advisory Board to
discuss the proposal. The District No. 15 budget contains funding allocated for the purchase
of a new lift station alarm system. However, the Advisory Board has voted not to proceed with
the purchase of the new system at this time. They believe the old alarm system is still useable.
Public Works staff has discussed the issue with several advisory board members and Oakley
Sanitary District staff. Public Works staff recommends that the new alarm-control system
should be installed. Staff's economic evaluation of the savings attainable with the new system
is indicated below.
Estimated Annual Savings on Operations and Maintenance
1) Eliminates the replacement of 10 "safe packs" each year.
Material Cost: 10 per year @ $120/each $ 1,200
Labor Cost to replace: 10 per year @ $24/each (1 hour) 240
Equipment Cost: 10 per year @ 1 hour/each @ $3.50/hour 40
2) Save approximately one-third of annual energy cost.
Energy Cost: 33% of $29,600 9,800
3) Avoid 2 pump motor burn outs per year.
Material Cost: 2 pump motors @$1,500/each 3,000
Labor Cost to replace: 2 motors @ 8 hours each @ $24/hour 380
2 motors @ 8 hours each @ $28/hour 440
Equipment Cost: 2 motors @ 8 hours each @ $11.50/hour 180
4) Save 6 pump motors from a complete burn out (partial damage).
Material Cost Differential: 6 pump motors @ ($1500-$800)/each 4,200
5) Eliminate frequent field inspections on pump motors (18 sites).
Labor Cost: 52 weeks @ 3 times/week @ 2'/2 hours/trip @ $28/hour 10,920
Equipment Cost: 52 weeks @ 3 times/week @ 2 1/2 hours/trip @ $3.50/hour 1,360
Estimated Total Annual Savings $ 31,180
Estimated Cost of New Monitoring System $162,000
Estimated Return on Investment 19.6%
The Project has been determined to be in compliance with the General Plan and is exempt
from CEQA because it is a minor alteration to an existing publicly-owned facility in accordance
with Section 15301 of the CEQA guidelines.
IV. Consequences of Negative Action:
The new system will not be installed and the savings noted above will not be attained.