DATE: April 24, 2024
TO: Council Infrastructure & Airport Committee
FROM: Director of Public Works
SUBJECT
Title
Water Resource Recovery Facility (WRRF) Improvements, Phase II - Project Update
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RECOMMENDATION
Recommendation
That the Council Infrastructure & Airport Committee (CIAC) reviews and comments on this report.
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SUMMARY
This report is presented to update the CIAC on the progress of the WRRF Improvements - Phase II Project (Phase II Project). The project includes upgrades to the treatment process to enhance the treatment capabilities of WRRF and to reduce the discharge of nutrients to the bay in compliance with the Regional Water Quality Control Board’s upcoming 3rd Watershed Permit. This project also includes construction of a new Administration Building and Laboratory.
The Water Resource Recovery Facility (WRRF, formerly WPCF) treats an average flow of approximately eleven million gallons per day (MGD) and meets current regulatory requirements for discharge of treated effluent to the deep waters of the San Francisco Bay. However, the current draft of the Regional Water Quality Control Board watershed permit, which is scheduled for adoption and planned to go into effect in August 2024, requires a 50% reduction in nutrients by 2034. In preparation for meeting the new requirements, design is underway on improvements with construction bid packages planned for advertisement in August 2024 for the Administration Building, and May 2025 for the Phase II Project. The proposed improvements include a new administration and laboratory building, relocated primary effluent equalization (PE EQ) tanks, a new biological nutrient removal (BNR) process, a new grit removal facility, modifications to the existing solids contact tank, demolition of the functionally obsolete existing west trickling filter, and construction of related ancillary facilities including pump stations, new aeration blower facilities, new process piping, and electrical infrastructure to support the new facilities.
The Administration Building is at the 100% design level, and is expected to bid in the fall of 2024. Relocation of the PE EQ Facility is at the 90% design level. Though initially designed as a standalone project, staff now recommends merging this project with the overall Phase II Improvements, which is currently scheduled to bid in April of 2025 and begin construction in fall of 2025. Overall project completion is scheduled for January of 2030.
ATTACHMENTS
Attachment I Staff Report