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LAWRENCE LIVERMORE NATIONAL LABORATORY (SITE 300) (USDOE) Page 2 of 5 <br /> primarily as a high-explosives and materials testing site in support of nuclear weapons research. Approximately <br /> 350 people who work in the area are provided with drinking water from groundwater in the area. Most are <br /> laboratory employees and State of California employees who work in a nearby State vehicular recreation area. <br /> Adjacent ranch houses and a State fire station also draw drinking water from the aquifer. <br /> Site Responsibility: NPL LISTING HISTORY <br /> DOE is the lead agency. EPA, DTSC, and RWQCB Proposed Date: 07/14/89 <br /> are signatories to the FFA. <br /> Final Date: 08/30/90 <br /> Deleted Date: <br /> THREATS AND CONTAMINANTS <br /> Groundwater and soil have been contaminated with solvents and other volatile organic <br /> compounds (VOCs), tritium, uranium-238, high explosive compounds (HMX, RDX), nitrate, <br /> and perchlorate. The primary health threat is drinking contaminated groundwater. <br /> w CLEANUP APPROACH <br /> This site is being addressed through a combination of removal actions and remedial actions. <br /> 'Response Action Status <br /> Initial Actions: In the spring of 1991, DOE installed a groundwater extraction and treatment <br /> system to curtail the migration of the VOC contamination plume. In the fall of 1992, another <br /> plume of VOC-contaminated groundwater was discovered. A second extraction and treatment <br /> system was installed to control this plume. DOE also began capping two landfills to prevent <br /> rainwater runoff from causing contaminant migration. In 1995, DOE signed an interim <br /> groundwater ROD for the Building 834 OU. In November 1995, DOE/LLNL and the <br /> regulatory agencies agreed to streamline the cleanup process by implementing removal <br /> actions where appropriate. In 1997, DOE signed a final ROD for the General Services Area <br /> OU. In 1998, groundwater pumping at the site boundary of the High Explosives Process Area <br /> OU was decided upon in an Action Memorandum. <br /> http://yosemite.epa.gov/r9/sfund/overview.nsf/0/5aedl3af6230899f8825660b007ee694?OpenDocument 3/15/2004 <br />