South San Francisco/San Bruno Water Quality Control Plant

City of South San Francisco, 
California

South San Francisco/San Bruno Water Quality Control Plant

Service Type: 
Project Highlights: 
  • 13-mgd primary and secondary capacity.
  • 62-mgd peak wet weather capacity.
  • Coordination with other discharges.
  • Extensive permitting, including wet weather treatment NPDES permit with Regional Water Quality Control Board.
South SF Tanks
Carollo’s design of improvements to the existing South San Francisco/San Bruno Water Quality plant overcame the challenge of locating new facilities in a small and awkward site, limited on three sides by San Francisco Bay.

Carollo provided complete planning, permitting and design services for the South San Francisco/San Bruno Water Quality Control Plant Improvement Project. The project consists of expanding the existing capacity from 9.0-mgd to 13-mgd average dry weather flow. Facilities are also being provided for wet weather treatment capacity of 62 mgd.

Carollo’s initial effort was a an evaluation to assess current treatment capacity. Following the capacity study, Carollo prepared a facility plan, which included an evaluation of future growth potential for industrial and commercial companies expected to site their facility in the South San Francisco area. In addition, Carollo’s design team coordinated our design with other dischargers that share the South San Francisco outfall. These include the City of Burlingame, the City of Millbrae, the San Francisco Airport, and the City of Bruno. Carollo held several meetings with the dischargers to gain consensus on design concepts for facilities that will be shared by all dischargers.

The project is located within the existing plant site, which is limited on three sides by the San Francisco Bay. Our design overcame the challenge of constructing the new facilities in a small and awkward area. The project consists of a new headworks, primary clarifiers, aeration basins, and new RAS/WAS pump station, two new anaerobic digesters, a sludge dewatering building, a regional sodium bisulfate facility to dechlorinate the effluent, a new regional effluent pump station and a new 10,000-square foot maintenance building.