SITE INFORMATION AND CORRESPONDENCE

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Community Memb* • February 28, 1991 Page 2 To prevent the chemicals from moving any further through the ground water, LLNL has installed a well to remove contaminated ground water. This well is near the location of an old debris pile on the site. The debris pile is suspected to be the source of the contamination problem. Ground water will be pumped out of the ground and then treated in an air stripper to remove the VOCs. The air stripper will force air through the contaminated water, causing the VOCs to evaporate into the air. The air from this treatment process will be passed through a carbon filter to remove the VOCs so that no contaminants are released to the air. LLNL will monitor and periodically test the treated water to make sure the chemicals have been removed. After testing, the treated water will be discharged into the Corral Hollow Creek streambed. Treatment will continue until the ground water in the eastern GSA area passes State and federal drinking water standards. Agencies AgArove Action As part of the design and permitting process under the Superfund program and the National Environmental Policy Act (NEPA), LLNL prepared a report describing the clean-up action for this one area of the site. The report includes information on how the project may affect the environment. This information is contained in the Draft Alternatives Analysis for Eastern GSA/Offsite Interim Ground Water Treatment Facility report. After evaluating the potential environmental effects of the project, the Department of Energy prepared a document known as a Finding of No Significant Impact (FONSI). The FONSI shows that the action will have no significant health or environmental impact on the surrounding area. Both documents have been reviewed and approved by the State and the EPA. 011Rortunities for Public omm nt LLNL encourages you to comment on what we plan to do during the removal action. The FONSI and its background documents will be available at the information repositories as soon as they are finalized. A public notice in the Tracy Press will announce when they are available for review. There are two information repositories for Site 300, located at LLNL's Visitor Center in Livermore and at the Tracy Public Library. A public comment period for the removal action will be held from May 1, 1991 through July 1, 1991. A notice of the comment period will be published in local newspapers. The notice will include the address where written comments can be sent, and a telephone number you can call to give your verbal comments. 91-2/W-195