Well 205 Groundwater Treatment Project

Well 205 Groundwater Treatment Project

The proposed project would involve construction and operation of a new groundwater treatment facility for treatment of perchlorate and other groundwater contaminants at the existing Well 205 site. Under the project, Well 205 would be reactivated, and all existing facilities would remain in place. The development footprint of the proposed groundwater treatment facility would be approximately 33,000 square feet, or approximately 0.8 acre. Groundwater pumped from Well 205 would proceed through pre-filters, granular activated carbon (GAC) vessels, ion exchange (IX) vessels, and chemical injection before connecting to an existing water distribution pipeline on the project site The project would not increase the production capacity of Well 205, and consistent with previous operating conditions, Well 205 would be equipped to produce up to 2,700 gallons of groundwater per minute from the Saugus Formation of the Santa Clara River Valley Groundwater Basin. The project would treat up to 4,360 acre-feet per year of groundwater. The new treatment facility would consist of a chemical building, water tanks, pumps, and treatment equipment alongside existing facilities at the site. Construction of the new groundwater treatment facility would occur between mid-2023 and mid-2024. Maintenance of the proposed project would include regular backwashing, replacement of filtration media, and routine performance monitoring and sampling. Maintenance staff would visit the project site daily, 365 days per year. Regular and routine maintenance activities would not include any ground-disturbing activities.

Santa Clarita

Los Angeles

Southern California

California Air Resources Board (ARB), California Department of Conservation (DOC), California Department of Forestry and Fire Protection (CAL FIRE), California Department of Parks and Recreation, California Department of Toxic Substances Control (DTSC), 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 Regional Water Quality Control Board, Los Angeles Region 4 (RWQCB), California State Lands Commission (SLC), Office of Historic Preservation, State Water Resources Control Board, Division of Drinking Water, State Water Resources Control Board, Division of Drinking Water, District 12, 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, California Department of Transportation, District 7 (DOT), California Department of Fish and Wildlife, South Coast Region 5 (CDFW)

California Department of Transportation, District 7 (DOT), California Department of Fish and Wildlife, South Coast Region 5 (CDFW)

Water Facilities (Groundwater treatment)(Type Water treatment, MGD 3.8)

Approval of construction bid package

Aesthetics, Agriculture and Forestry Resources, Air Quality, Biological Resources, Coastal Zone, Cultural Resources, Cumulative Effects, Drainage/Absorption, Energy, Flood Plain/Flooding, Geology/Soils, Greenhouse Gas Emissions, Hazards & Hazardous Materials, Hydrology/Water Quality, Land Use/Planning, Mineral Resources, Noise, Population/Housing, Public Services, Recreation, Schools/Universities, Septic System, Sewer Capacity, Solid Waste, Transportation, Tribal Cultural Resources, Utilities/Service Systems, Vegetation, Wetland/Riparian, Wildfire