Draft Remedial Action Plan, Gardena Sumps

2 Documents in Project


SCH Number
Lead Agency
Department of Toxic Substances Control
Document Title
Draft Remedial Action Plan, Gardena Sumps
Document Type
NEG - Negative Declaration
Present Land Use
Mixed Use Overlay, existing brownfield commercial and industrial site
Document Description
The Department of Toxic Substances Control (DTSC) is proposing Corrective Measures for soil and groundwater at the Gardena Sumps (Site). Corrective measures would involve excavating the Haack Rework Area and a portion of sludge overflow along the eastern perimeter of the Cooper Sumps and consolidating the materials above the Cooper North and South Sumps. A cap consisting of a stabilization layer, foundation layer, low-hydraulic conductivity layer, and erosion resistance layer would be constructed above the sumps. A vapor control and monitoring system would be installed beneath the cap and around the sumps, and existing groundwater monitoring occurring at the Site would continue.

Contact Information

Nicholas Ta
Agency Name
Department of Toxic Substances Control
Job Title
Project Manager
Contact Types
Lead/Public Agency


Los Angeles
Cross Streets
1450 West Artesia Boulevard

Notice of Completion

State Review Period Start
State Review Period End
State Reviewing Agencies
California Air Resources Board (ARB), California Department of Conservation (DOC), California Department of Fish and Wildlife, South Coast Region 5 (CDFW), California Department of Forestry and Fire Protection (CAL FIRE), California Department of Parks and Recreation, California Department of Water Resources (DWR), California Governor's Office of Emergency Services (OES), 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, State Water Resources Control Board, Division of Drinking Water, California Department of Transportation, District 7 (DOT)
State Reviewing Agency Comments
California Department of Transportation, District 7 (DOT)
Development Types
Hazardous Waste (cleanup of existing hazardous wastes)
Local Actions
Site Plan
Project Issues
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, Transportation, Tribal Cultural Resources, Utilities/Service Systems, Wildfire
Local Review Period Start
Local Review Period End


Notice of Completion [NOC] Transmittal form
State Comment Letters [Comments from state reviewing agencies]

Disclaimer: The Governor’s Office of Planning and Research (OPR) accepts no responsibility for the content or accessibility of these documents. To obtain an attachment in a different format, please contact the lead agency at the contact information listed above. You may also contact the OPR via email at state.clearinghouse@opr.ca.gov or via phone at (916) 445-0613. For more information, please visit OPR’s Accessibility Site.

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