Surface Water Treatment Plant Improvement Project

Surface Water Treatment Plant Improvement Project

The Project proposes to construct improvements and/or replace existing infrastructure at the Knights Ferry SWTP. The Project proposes to add a package style water filtration system that includes an up-flow adsorption clarifier adjacent to a mixed media filter, such as the Tri-Mite Package Water Treatment Plant (Tri-Mite) system. The Tri-Mite treatment technology has been demonstrated to satisfy the operational and performance requirements necessary to be accepted as an alternative filtration technology under the California Surface Water Treatment Rule (CSWTR), in CCR, Title 22, Section 64665 (CCR, 2000). The Project would include installation of the Tri-Mite treatment system as well as a pumping station to allow sufficient flow among the treatment system and for adequate storage to meet maximum day demand and fire flow. The existing 30,000-gallon storage tank onsite, which has been inoperable, would be demolished as part of the Project. With installation of the Tri-Mite system, the existing flocculation and sedimentation, chlorine contact tanks, and existing multi-media filters would no longer be necessary and would be demolished as well. Other improvements would include site modifications for safety and efficient operations such as parking and onsite security measures with lighting as needed. The Project includes the following project components: • Installation of the Tri-Mite packaged filter system consisting of one (1) 80-gallons per minute (gpm) unit • A transfer pumping station • Cleaning and recoating of the existing 110,000-gallon storage tank • Installations of 100,000-gallon storage tank (for finished water) • Construction of a chemical storage and filter building • A high service pumping station • A backwash pumping station • Demolition of the existing 30,000-gallon finished water storage tank • Demolition of the existing flocculation and sedimentation tanks • Demolition of the existing chlorine contact tanks • Demolition of the existing multi-media filters • Disposal of disconnected water treatment infrastructure (i.e., the abandoned clarifier) The following components/existing infrastructure would remain in place: • The raw water intake pump station • Raw water supply lines to the plant • 5,000-gallon raw water storage tank • The building housing the multi-media filters • Residuals management system (sludge drying bed) • Existing 110,000-gallon finished water storage tank • Standby generator • Existing storage shed

Knights Ferry

Stanislaus

Northern California

California Air Resources Board (ARB), California Department of Conservation (DOC), California Department of Fish and Wildlife, Central Region 4 (CDFW), California Department of Fish and Wildlife, North Central Region 2 (CDFW), California Department of Forestry and Fire Protection (CAL FIRE), California Department of Parks and Recreation, California Department of Resources Recycling and Recovery, California Department of Toxic Substances Control (DTSC), California Department of Transportation, District 10 (DOT), California Department of Water Resources (DWR), California Fish and Game Commission (CDFGC), California Governor's Office of Emergency Services (OES), California Highway Patrol (CHP), California Native American Heritage Commission (NAHC), California Natural Resources Agency, California Regional Water Quality Control Board, Central Valley Sacramento Region 5 (RWQCB), California San Joaquin River Conservancy (SJRC), California State Lands Commission (SLC), Delta Protection Commission, Delta Stewardship Council, Office of Historic Preservation, State Water Resources Control Board, Division of Drinking Water, State Water Resources Control Board, Division of Water Quality, State Water Resources Control Board, Division of Water Rights, State Water Resources Control Board, Divison of Financial Assistance

Other (Surface Water Treatment Plant Improvements)

Surface Water Treatment Plant Improvements

Air Quality, Biological Resources, Cultural Resources, Tribal Cultural Resources