Western Municipal Water District Arlington Desalter Expansion Phase 2 Project

SCH Number: 2010091090
Lead Agency: Western Municipal Water District
Document Title: Western Municipal Water District Arlington Desalter Expansion Phase 2 Project
Document Type: MND - Mitigated Negative Declaration
Received: 9/30/2010

Document Description: NOTE: Review Per Lead In its ongoing efforts to improve the quality of groundwater in the Arlington Basin, increase the availability of potable water to the WMWD and to better manage groundwater levels in the Arlington Basin, the WMWD is proposing two basic project approaches (construction of extraction wells only or construction of extraction wells and recharge basins). The Arlington Desalter is undergoing expansion of its treatment capacity to accommodate the increased demand for treatment capacity at the plant. The expansion includes an upgrade in the treatment process which will allow the Arlington Desalter to treat additional raw water while reducing the amount of brine wastes generated. Currently, the WMWD has adequate brine capacity in the SARI pipeline and discharges brine wastes to the SARI pipeline for treatment at the OCSD. The WMWD is in the process of improving the treatment efficiency of the Desalter facility. The WMWD forecasts that after the improvements are made to the Desalter facilities and the wells proposed by this project are operational, the Desalter will remain within its allotted discharge capacity in the SARI pipeline and treatment capacity in the OCSD.

Contact Information: Jack Safely
Western Municipal Water District
450 East Alessandro Boulevard
Riverside, CA 92506
951-789-5041

Review Period Start: 9/30/2010
Review Period End: 11/1/2010
Development Type: Water Facilities (production Type, up to 10.6 MGD)
Local Action: Other Action Other Action: water production & treatment facilities
Project Issues: Cumulative Effects Wetland/Riparian Water Supply Water Quality Vegetation Traffic/Circulation Toxic/Hazardous Soil Erosion/Compaction/Grading Noise Geologic/Seismic Biological Resources Archaeologic-Historic Air Quality
Reviewing Agencies: State Water Resources Control Board, Divison of Financial Assistance California Department of Public Health California Department of Parks and Recreation California Highway Patrol Caltrans, District 8 Department of Fish and Wildlife, Region 6 Department of Toxic Substances Control Department of Water Resources Native American Heritage Commission Office of Historic Preservation Regional Water Quality Control Board, Region 8 Resources Agency