Aspan Well Rehabilitation and Treatment Project


SCH Number
Lead Agency
Azusa Light and Water Department
Document Title
Aspan Well Rehabilitation and Treatment Project
Document Type
NEG - Negative Declaration
Document Description
The proposed project consists of the rehabilitation of the Aspan Well which is currently inactive and has experienced deterioration of the well casing. As part of the rehabilitation, the City of Azusa will install a new well casing liner to preserve the well's integrity and will remove the existing welded steel tank and booster pump station from the site. The current water quality issue for the Aspan Well is the presence of 1,1-DCE in excess of the maximum contaminant level (MCL), the concentration allowed in drinking water by the California State Water Resources Control Board – Division of drinking Water, which requires the installation of a Liquid Phase Granular Activated Carbon (LGAC) treatment system. The proposed LGAC treatment system will be designed for a flow of approximately 1,800 gallons per minute (gpm) and will include two pairs of 12-foot diameter filtration vessels. In addition, Nitrate has been detected in the past in the Aspan Well, although Nitrate concentrations were recently shown to be below the MCL. If treatment for nitrates is needed, the IX treatment system will be installed downstream of the LGAC system and will feature three vessels working in parallel. A new 34,000 gallon brine waste tank will be constructed to temporarily hold the brine waste, which will be discharged from the tank to a Los Angeles County Sanitation Districts’ (LACSD) sewer line. A new 8-inch diameter PVC brine discharge pipeline will convey brine waste to the LACSD sewer line. Well waste water, well test water, and waste water for testing operations will be discharged through a new drain pipeline that will connect to the existing Los Angeles County Flood Control District (LACFCD) 51-inch diameter storm drain.

Contact Information

Melissa Barbosa
Agency Name
City of Azusa
Job Title
Assistant General Manager
Contact Types
Lead/Public Agency


Los Angeles
Parcel #

Notice of Completion

State Review Period Start
State Review Period End
State Reviewing Agencies
California Air Resources Board (ARB), California Department of Fish and Wildlife, South Coast Region 5 (CDFW), 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), Office of Historic Preservation, San Gabriel and Lower Los Angeles Rivers and Mountains Conservancy (RMC), State Water Resources Control Board, Division of Drinking Water, State Water Resources Control Board, Division of Drinking Water, District 15, State Water Resources Control Board, Division of Drinking Water, District 16, State Water Resources Control Board, Division of Drinking Water, District 22, State Water Resources Control Board, Division of Drinking Water, District 7, 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)
State Reviewing Agency Comments
California Department of Transportation, District 7 (DOT)
Development Types
Water Facilities (Water Treatment Facility)(Type LGAC Treatment, MGD 1.63)
Local Actions
Water Treatment
Project Issues
Aesthetics, Agriculture and Forestry Resources, Air Quality, Biological Resources, Cultural Resources, Cumulative Effects, Drainage/Absorption, Energy, Flood Plain/Flooding, Geology/Soils, Greenhouse Gas Emissions, Growth Inducement, Hazards & Hazardous Materials, Hydrology/Water Quality, Land Use/Planning, Mandatory Findings of Significance, Mineral Resources, Noise, Population/Housing, Public Services, Recreation, Schools/Universities, Septic System, Sewer Capacity, Solid Waste, Transportation, Tribal Cultural Resources, Utilities/Service Systems, Wetland/Riparian, Wildfire
Local Review Period Start
Local Review Period End


Notice of Completion [NOC] Transmittal form
State Comment Letters [Comments from State Reviewing Agency(ies)]

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