Draft Final Remedial Action Plan, Gardena Sumps
2 Documents in Project
Summary
SCH Number
2022020305
Lead Agency
California Department of Toxic Substances Control
(DTSC)
Document Title
Draft Final Remedial Action Plan, Gardena Sumps
Document Type
NOD - Notice of Determination
Received
Posted
6/17/2022
Document Description
The Department of Toxic Substances Control (DTSC), pursuant to authority granted under Chapter 6.8, Division 20, section 25300 et seq approved a Remedial Action Plan (RAP) for the Gardena Sumps Site (Site). The Site is approximately 6.48 acres of mixed-use development (i.e., residential and commercial) and primarily consists of two properties, the Cooper property and the Haack property. The Cooper property comprises two large sumps (referred to as the “Cooper North” and “Cooper South” sumps). The Haack property contains one modified sump (referred to as the “Haack sump”) and the “Haack Rework Area,” which was a mixed sludge-soil area south of the Haack sump. The Haack Rework Area encroaches onto the extreme northern portions of the two easternmost residential lots. Commercial property is located west of the Haack sump, and four residential properties are located south of the commercial property and the Haack sump.
The RAP proposes 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 multi-layer, engineered geosynthetic 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 and long-term inspection and maintenance would continue at the Site.
Activities associated with the remedial actions would occur over an approximately 23-week period.
Contact Information
Name
Nicholas Ta
Agency Name
Department of Toxic Substances Control
Job Title
Project Manager
Contact Types
Lead/Public Agency
Phone
Email
Location
Cities
Gardena
Counties
Los Angeles
Regions
Citywide
Cross Streets
Southwest corner of Artesia Boulevard and Normandie Avenue
Notice of Determination
Approving Agency
Department of Toxic Substances Control
Approving Agency Role
Lead Agency
Approved On
County Clerk
Los Angeles
Final Environmental Document Available at
www.envirostor.dtsc.ca.gov/public/profile_report.asp?global_id=19490135
Determinations
(1) The project will have a significant impact on the environment
No
(2a) An Environmental Impact Report was prepared for this project pursuant to the provisions of CEQA
No
(2b) A Mitigated or a Negative Declaration was prepared for this project pursuant to the provisions of CEQA
Yes
(2c) An other document type was prepared for this project pursuant to the provisions of CEQA
No
(3) Mitigated measures were made a condition of the approval of the project
No
(4) A mitigation reporting or monitoring plan was adopted for this project
No
(5) A Statement of Overriding Considerations was adopted for this project
No
(6) Findings were made pursuant to the provisions of CEQA
Yes
Attachments
Notice of Determination
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