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' STATE OF CALIFORNIA • 0 PETE WILSON Governor <br /> CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD— <br /> CENTRAL VALLEY REGION <br /> 3443 ROUTIER ROAD, SUITE A13 <br /> SACRAMENTO, CA 95827-3098 <br /> PHONE: (916) 361-5600 <br /> FAX: (916) 361-5686 <br /> Mr. Abel Haines <br /> SEP ) inn- 10 September 1991 <br /> Director, Environmental Program Office ENVIRON(IVIET•ff�lL HEALTH <br /> Defense Distribution Region West, Tracy I'ERi1I`f/S( RVICES <br /> Tracy, CA 95367-5000 <br /> DRAFT SOLID WASTE MANAGEMENT UNIT ENGINEERING REPORT, DEFENSE DISTRIBUTION REGION <br /> WEST (DDRW), TRACY, SAN JOAQUIN COUNTY <br /> We have reviewed the Draft Solid Waste Management Unit Report submitted on 10 June <br /> 1991 for DDRW, Tracy. Overall , the Report was well prepared and the summary tables <br /> were very useful in reviewing the Report. The recommendations in the Report for <br /> the investigation of each waste management unit (WMU) are generally adequate and <br /> should provide for a thorough investigation of the soils and ground water at each <br /> WMU. <br /> However, we believe that the proposals for the investigations in some of the WMUs <br /> needs to be reevaluated. We recommend that the soils investigations be more <br /> adequately focused to the past waste disposal practices at a particular WMU. In <br /> addition, we recommend that the soils and ground water investigations be separate <br /> and conducted in a phased approach so that the analytical results of the soil <br /> samples are used to determine if a ground water investigation is necessary for each <br /> WMU. <br /> We have enclosed a memorandum which discusses our comments on the evaluations of <br /> the WMUs and the recommendations for additional investigations. We request that <br /> DDRW, Tracy consider our comments in the preparation of the final work plan prior <br /> to conducting the soils and ground water investigations of the WMUs. <br /> If you have any questions, please call me at (916)361-5670. <br /> CAMILLA WILLIAMS <br /> Engineering Geologist <br /> CKW:cw <br /> Enclosure <br /> cc: Mr. Michael Work, U. S. Environmental Protection Agency, Region IX, San <br /> Francisco <br /> Mr. Jim Pinasco, Department of Toxic Substances Control , Region 1, <br /> Sacramento <br /> Ms. Dianne Hinson, Public Health Services of San Joaquin County, <br /> Environmental Health Department, Stockton <br /> Mr. Marshall Cloud, Defense Distribution Region West, Tracy, Tracy <br /> Captain David Jones, U. S. Army Corps of Engineers, Huntsville, Alabama <br />