Approval of Interim Remedial Measure, Soil Excavation Work Plan-General Atomics


SCH Number
Public Agency
California Department of Toxic Substances Control (DTSC)
Document Title
Approval of Interim Remedial Measure, Soil Excavation Work Plan-General Atomics
Document Type
NOE - Notice of Exemption
Document Description
The project is the approval, by the Department of Toxic Substances Control (DTSC), of a work plan describing the excavation of hazardous waste contaminated soil as an Interim Remedial Measure (IRM). General Atomics (GA) is conducting a voluntary clean-up, with DTSC oversight, of soil contaminated with chlorinated solvent and its breakdown products. The Department of Health Services previously approved the area of the former manufacturing facility for "free release" based on radiation surveys done in 1993. Concentrations of trichloroethene in the substance soils were detected in excess of the U.S. Environmental Protection Agency Region IX Preliminary Remediation Goals (PRG) for industrial sites level of 6.1 mg/kg. The excavation will extend to approximately 14 feet below ground surface and will require shoring and monitoring. Samples will be collected from the bottom and sides of the excavation. Standard dust suppression and confined space techniques will be used. This involves wetting soils and covering the stockpilled material with heavy (minimum 30 ml) polyethulene sheeting. On onsite laboratory will be used to monitor and test for contaminant concentration during the excavation. Contaminated soils will be transported to permitted off-site facilities for disposal.

Contact Information

Walter Bahm
Agency Name
Department of Toxic Substances Control
Contact Types
Lead/Public Agency


San Diego
San Diego
Cross Streets
3550 General Atomics

Notice of Exemption

Exempt Status
Statutory Exemption
Type, Section or Code
Title 14, CCR 15330
Reasons for Exemption
The proposed removel action will occur within a two week period and require less than one million dollars. All contaminated soil will be disposed of a appropriately permitted off-site facilities. The site is not on any list compiled pursuant to section 65962.5 of the Government Code, referred to as the Hazardous Waste and Substances Site List, which includes the Cortese List and the CalSites data base. This action is to mitigate adverse environmental impacts to groudwater and to ensure protection of the environment in the future.

Disclaimer: The document was originally posted before CEQAnet had the capability to host attachments for the public. To obtain the original attachments for this document, please contact the lead agency at the contact information listed above. You may also contact the OPR via email at or via phone at (916) 445-0613.

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