Interim Measures Workplan for Soils and Soil Vapor at Plant I of the Northrop East Complex Facility

Summary

SCH Number
2012068304
Lead Agency
Toxic Substances Control, Department of (Department of Toxic Substances Control)
Document Title
Interim Measures Workplan for Soils and Soil Vapor at Plant I of the Northrop East Complex Facility
Document Type
NOE - Notice of Exemption
Received
Posted
6/22/2012

Document Description
Interim Measures Workplan for Soils and Soil Vapor at Plant I of the Northrop East Complex Facility This project is for the Department of Toxic Substances Control's (DTSC) approval of an Interim Measure (IM) to address soil and groundwater impacted by chlorinated volatile organic compounds (VOCs) at Plant I of the Northrop East Complex Facility (Facility). Soil Vapor Extraction (SVE) was selected as a preferred presumptive remediation measure based on evaluation of soil properties and physical characteristics of the chemicals of potential concern at the Facility. The SVE system will decrease the VOC concentration in the vadose zone, and consequently reduce the threat of continuing migration of contamination from the vadose zone into the ground water. SVE has proven to be effective in remediating other areas at the Facility which were given an interim measure completeness determination by DTSC in June 2011. Quarterly and Semi-Annual groundwater monitoring will continue and will allow evaluation of the effects of the on-going cleanup on ground water. Plant I is generally surrounded by asphalt-paved parking area, a concrete-lined Dominguez Channel, railroad tracks, and commercial, industrial, and residential developments.

Contact Information
Marie Fabella
Department of Toxic Substances Control
9211 Oakdale Avenue
Chatsworth, CA 91311-6505

Phone : (818) 717-6598

Location

Cities
Hawthorne
Counties
Los Angeles

Notice of Exemption

Exempt Status
Other
Type, Section or Code
Sec. 15061(b)(3)
Reasons for Exemption
Note: General Rule Exemption. DTSC has determined that there is no possibility the proposed project will result in a significant effect to the environment. No significant effect on public health or the environment because of the relatively small volume, short project duration, and the controlled manner in which contaminted soils will be extracted, loaded onto trucks, and taken off-site for disposal/treatment.

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 state.clearinghouse@opr.ca.gov or via phone at (916) 445-0613.

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