Title
Staff Report for a Resolution Accepting the Work of the Water Pollution Control Plant Rehabilitation Project, Project No. 08-593-52-239
Staffreport
SUMMARY AND RECOMMENDATIONS
Staff recommends acceptance of the work, filing of the Notice of Completion, and authorizing the City Manager to release the performance and payment bonds, and upon completion to the satisfaction of the City Engineer of the one-year maintenance period, to release the maintenance bond for the subject project.
BACKGROUND
The City owns and operates a sewage treatment facility on twelve acres of land known as the Water Pollution Control Plant (WPCP) located at 3000 Davis Street. This facility treats residential, commercial, and industrial wastewater from two-thirds of the City before it is transferred to the East Bay Dischargers Authority and ultimately pumped to the San Francisco Bay. The plant operates under a permit from the Regional Water Quality Control Board and is authorized to treat up to 7.6 million gallons per day (mgd) average dry weather flow and 22.3 mgd average wet weather flow.
The WPCP was originally constructed circa 1938, and a major expansion was done in 1970 to keep up with changing wastewater regulations. A comprehensive condition and process study was done in 2005 that identified maintenance, replacements, and upgrades necessary to maintain treatment capacity, increase redundancy, and improve reliability.
From the 2005 study, the following work was included in the WPCP Rehabilitation project:
Construction of the following new facilities
1. Primary Clarifier
2. Biofilters for odor control
3. Electrical Building and 6kw electrical service for entire plant
4. Fixed Film Reactor (FFR) Recirculation Structure
5. Grit Facility
6. Equalization pond
Replacement of the following existing facilities
1. Fixed Film Reactor (FFR)
2. FFR Lift Station
3. Headworks and Influent Pump Station
4. Primary Effluent Flow Equalization Facilities (E...
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