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

Stanislaus