Soscol Recycled Water Pump Station Upgrade Project


SCH Number
Lead Agency
Napa Sanitation District
Document Title
Soscol Recycled Water Pump Station Upgrade Project
Document Type
MND - Mitigated Negative Declaration
Present Land Use
Public Lands: Airport Compatibility (PL:AC)
Document Description
The Napa Sanitation District (District) owns and operates the Soscol Water Recycling Facility (SWRF). The SWRF is comprised of a wastewater treatment plant (WWTP) that produces recycled water, a recycled water pump station (Soscol Recycled Water Pump Station, or SPS) to distribute recycled water and two recycled water reservoirs to store recycled water post treatment and prior to distribution. The SPS contains three large vertical turbine pumps and a jockey pump to service the distribution system. Upgrades for the SPS are needed to address pressure, reliability, and redundancy issues while maintaining separation between two distribution branches to the north and south. A lack of redundancy exists because peak demands can occur on the two distribution branches simultaneously, which requires all pumps at the SPS to operate in the summer months. The redundancy issue is exacerbated when one of the facility's pumps is out of service. During a large pump outage, the SPS has less capacity, which limits its ability to meet customers’ needs. Due to the complexity of completing repairs at the SPS, outages can last longer than customers are able to sustain. The proposed project would replace the existing jockey pump within the SPS, add an additional jockey pump and an additional vertical turbine pump, and would include the addition of a pump bay. These new components at the SPS would also prolong the life of the current vertical turbine pumps and conserve energy during periods of lesser demand. Overall, the proposed project would benefit the District’s recycled water customers and provide additional drought resiliency by increasing the dependability of recycled water delivery.

Contact Information

Gavin Glascott
Agency Name
Napa Sanitation District
Job Title
Associate Civil Engineer
Contact Types
Lead/Public Agency

Allan Briggs
Agency Name
Hazen and Sawyer
Job Title
Associate Vice President
Contact Types
Consulting Firm


Northern California
Cross Streets
1515 Soscol Ferry Rd
Parcel #
State Highways
State Route 12 & State Route 29
Napa County Airport
Napa River

Notice of Completion

State Review Period Start
State Review Period End
State Reviewing Agencies
California Air Resources Board (ARB), California Department of Fish and Wildlife, Marin Region 7 (CDFW), California Department of Parks and Recreation, California Department of Transportation, District 4 (DOT), California Department of Transportation, Division of Aeronautics (DOT), California Department of Transportation, Division of Transportation Planning (DOT), California Department of Water Resources (DWR), California Highway Patrol (CHP), California Native American Heritage Commission (NAHC), California Natural Resources Agency, California Regional Water Quality Control Board, San Francisco Bay Region 2 (RWQCB), California State Lands Commission (SLC), Department of Toxic Substances Control, Office of Historic Preservation, San Francisco Bay Conservation and Development Commission (BCDC), State Water Resources Control Board, Division of Drinking Water, State Water Resources Control Board, Division of Drinking Water, District 3, State Water Resources Control Board, Division of Water Quality, State Water Resources Control Board, Divison of Financial Assistance, California Department of Fish and Wildlife, Bay Delta Region 3 (CDFW)
State Reviewing Agency Comments
California Department of Fish and Wildlife, Bay Delta Region 3 (CDFW)
Development Types
Water Facilities (Soscol Recycled Water Pump Station)(Type Recycled Water, MGD 12)
Local Actions
Site Plan
Project Issues
Biological Resources, Cultural Resources, Tribal Cultural Resources
Local Review Period Start
Local Review Period End


State Comment Letters [Comments from state reviewing agencies]

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