Operation of Rancho California Water District - Disinfection Improvements at the Ace Bowen and Senga Doherty Pump Stations Project (Project)

SCH Number: 2018079020
Lead Agency: State Water Resources Control Board
Document Title: Operation of Rancho California Water District - Disinfection Improvements at the Ace Bowen and Senga Doherty Pump Stations Project (Project)
Document Type: NOD - Notice of Determination
Received: 2/25/2019

Document Description: Site 1: The District will construct 3 chloramination chemical injections stations, (each including a static mixer, water sampling probe in a vault, and associated piping). The District will also construct a disinfection building and install 2 sodium hypochlorite metering pumps, 2 aqua ammonia metering pumps, an aqua ammonia storage tank, an ammonia scrubber, 3 chlorine analyzers, 3 chloramine analyzers, and a sodium hypochlorite generation system with water supply chiller. Concrete tank foundations with a metal sunshade will also be installed to shelter a sodium hypochlorite tank, salt brine maker, and a relocated standby generator. Site 2: The District installed a chloramination chemical injection station, including a static mixer and piping. The District also constructed at a disinfection building and installed 2 sodium hypochlorite metering pumps, 2 aqua ammonia metering pumps, a sodium hypochlorite tank and brine makeup tank, an aqua ammonia storage tank, an ammonia scrubber, a chlorine analyzer, a chloramine analyzer, and a sodium hypochlorite generation system with water supply chiller. A concrete foundation with metal sunshade was also installed to shelter a sodium hypochlorite tank, a salt brine maker, and outdoor air conditioning unit. An existing chlorine shed was removed from the site. The project will provide for the operation of the system.

Contact Information: J Steven Williams
State Water Resources Control Board
1350 Front Street, Room 2050
San Diego, CA 921001
619-525-4159

(1) The project will have a significant impact on the environment: No
(2a) An Environmental Impact Report was prepared for this project pursuant to the provisions of CEQA: No
(2b) A Negative Declaration was prepared for this project pursuant to the provisions of CEQA: Yes
(3) Mitigated measures were made a condition of the approval of the project: No
(4) A Statement of Overriding Considerations was adopted for this project: No
(5) Findings were made pursuant to the provisions of CEQA: Yes