Aquifer Storage and Recovery Program

Aquifer Storage and Recovery Program

Stockton East Water District (District) proposes to utilize existing supply Well 74-01 for an aquifer storage and recovery (ASR) program on the premises of the Dr. Joe Waidhofer Drinking Water Treatment Plant (WTP). Recharge to the aquifer will utilize drinking water from the WTP at an estimated rate of 450 gallons per minute (gpm). The drinking water is derived from the District’s diversion of water from the Calaveras River and the Stanislaus River. The recovery of the stored water (production) will occur at rates up to 1,500 gpm. The production volume will be limited to between 70% and 80% of the recharge volume. The stored water will serve as a dry-year supplemental supply to the WTP and will also serve to restore groundwater storage in the aquifer during wet years. The discharge of stored water from Well 74-01 will be conveyed to the South Raw Water Reservoir via an existing pipeline. Water in the reservoir will be treated to drinking water standards prior to delivery to the Urban Contractors distribution systems. Two 4-inch-diameter observation wells (OW) will be installed within 100 feet of Well 74-01, including a 200-foot shallow well and a 500-foot deep well, to monitor changes in groundwater levels (WLs) and changes in deep water quality during ASR operations. A second deep OW will be installed approximately 3500 feet northeast of Well 74-01, along an on-site access road, to monitor WL changes.

Stockton

San Joaquin

Citywide, Countywide, Northern California

California Department of Conservation (DOC), California Department of Fish and Wildlife, Bay Delta Region 3 (CDFW), California Department of Fish and Wildlife, North Central Region 2 (CDFW), California Department of Parks and Recreation, California Department of Toxic Substances Control (DTSC), California Department of Transportation, District 10 (DOT), California Department of Water Resources (DWR), California Highway Patrol (CHP), California Native American Heritage Commission (NAHC), California Natural Resources Agency, California Public Utilities Commission (CPUC), 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 Drinking Water, District 10, 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, Central Valley Flood Protection Board, California Regional Water Quality Control Board, Central Valley Sacramento Region 5 (RWQCB)

Central Valley Flood Protection Board, California Regional Water Quality Control Board, Central Valley Sacramento Region 5 (RWQCB)

Water Facilities (2.2 MGD recovery pumping)(Type ASR Well, MGD 0.6)

Use Permit, ASR Program

Aesthetics, Agriculture and Forestry Resources, Air Quality, Biological Resources, Cultural Resources, Energy, Geology/Soils, Greenhouse Gas Emissions, Hazards & Hazardous Materials, Hydrology/Water Quality, Land Use/Planning, Mandatory Findings of Significance, Mineral Resources, Noise, Population/Housing, Public Services, Recreation, Utilities/Service Systems, Wildfire, Water Supply/Groundwater