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Pacific Southwest, Region 9: Superfund

Serving Arizona, California, Hawaii, Nevada, the Pacific Islands, and Tribal Nations

San Fernando Valley (area 2 Glendale)

Superfund Site

Technical Document

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Date Title / pdf File
01/01/12 Timeline of Actions to Address Chromium Contamination in San Fernando Valley (1989-2011)
1989Chromium Detected in Ground Water − EPA detects chromium contamination in ground water within San Fernando Valley Sites and begins tracking chromium data.
1998Investigation of Chromium Sources − EPA funds a four-year investigation of chromium sources through the California Regional Water Quality Control Board-Los Angeles Region. The State of California leads oversight of the cleanups for known or suspected sources of chromium contamination.
1999Monitoring of Chromium Contamination − EPA begins quarterly monitoring for hexavalent chromium. The area of ground water contaminated with chromium is significant, although less wide-spread and continuous than the solvent plume.
2000Adjustments to Ground Water Treatment Systems – To meet the voluntary chromium limit (5 parts per billion) adopted by the Cities of Burbank, Glendale and Los Angeles, EPA adjusts the pumping rates for certain extraction wells within the treatment system for the Glendale OUs. The treatment system, designed to contain and remove TCE and PCE contamination, is incapable of treating chromium or other metals. EPA also provides financial support to the City of Glendale to investigate potential technologies for removing chromium from drinking water.
2003Further Investigation of Chromium Sources − EPA begins providing contractor support to further assist the Regional Water Quality Control Board with investigations and cleanup of chromium sources. EPA also works with the California Department of Toxic Substances Control to identify and clean up sources of chromium contamination.
2006Chromium Action Plan − EPA develops a Chromium Action Plan to identify short term and long term actions by EPA, the state and the cities to address chromium contamination and its impact on drinking water in the basin. The priority is removing sources of chromium in the ground before the contamination reaches ground water.
2007Glendale Chromium Operable Unit − EPA establishes a Glendale Chromium Operable Unit (GCOU) within the San Fernando Valley Area 2 Superfund Site.
2007Removal Action − EPA takes the lead for cleanup work at All Metals Processing Company, a metal plating shop in Burbank abandoned by the owner, with hazardous chemicals seeping onto the ground and located adjacent to a storm water canal. EPA removes drums and chemicals; excavates soils contaminated with chromium VI, cadmium and cyanide; and demolishes a contaminated building.
2008San Fernando Valley Chromium Work Shop – EPA and the State of California host a work shop to discuss actions to investigate and address chromium contamination; proposed cleanup goals; and technologies for treatment of hexavalent chromium in water. Refer to the technical documents posted on the San Fernando Valley (All Areas) page (http://www.epa.gov/region9/SanFernandoAllAreas) to view materials from the work shop.
2010Removal Action − EPA assumes the lead for investigation of Drilube Company, a former metal plating facility in Glendale, and initiates a removal action. The cleanup involves excavation of 460 tons of soil contaminated with chromium. VOCs, including PCE and TCE, also contaminate the facility.
2011Administrative Order on Consent − EPA enters into an agreement with a group of four PRPs, the GCOU Respondents, to perform a portion of the remedial investigation of contamination in ground water.
2011Remedial Investigation − EPA initiates a remedial investigation of chromium contamination in ground water in the GCOU.

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