SCH Number 2022020305
- Draft Remedial Action Plan, Gardena Sumps
- 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.
2 documents in project