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/ • <br /> STATE OF CALIFORNIA <br /> PETE ON, Governor <br /> CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD— <br /> CENTRAL VALLEY REGION <br /> ROUTIER ROAD, SUITE A <br /> SACRAMENTO, CA 95827-3098 <br /> PHONE: (916) 361-5600 � <br /> 91 <br /> FAX (916) 361-5686 #,y <br /> 41 <br /> Vr <br /> Mr. Abel Haines AUG 221 1 Lst 1991 <br /> Director, Environmental Protection Office ENVIRONMENTAL HEALTH <br /> Defense Distribution Region West, Tracy PERMIT/SERVICES <br /> Tracy, CA 95367-5000 <br /> 11 JULY 1991 PROPOSED PLAN, DEFENSE DISTRIBUTION REGION WEST (DDRW) , TRACY, SAN <br /> JOAQUIN COUNTY <br /> We have reviewed the 11 July 1991 Proposed Plan for the completion of the <br /> Remedial Investigation/Feasibility Study (RI/FS) Report for Operable Unit (OU) 1 <br /> at the DDRW, Tracy site. We have previously reviewed the RI/FS Report and on <br /> 5 July 1991 we sent our letter on the review of that Report. As you know, we are <br /> pleased with the progress that Tracy has made in the RI for OU 1 and that the <br /> Interim Remedial Measure (IRM) for the ground water cleanup has been installed <br /> and is awaiting our approval to begin full scale operations. We believe that any <br /> shortcomings in the current RI may be easily compensated for in the site-wide RI . <br /> Therefore, we approve of the RI Report for OU 1. <br /> The Environmental Protection Agency (EPA) and the Department of Toxic Substances <br /> Control (DTSC) indicated that the Risk Assessment portion of the RI/FS must <br /> follow the EPA's Risk Assessment Guidelines. The Proposed Plan was submitted by <br /> the Corps of Engineers so that the data needed for the Risk Assessment could be <br /> collected and the RI/FS Report for OU 1 could be completed. <br /> The Proposed Plan was discussed in a telephone conference call on 31 July 1991 <br /> between the EPA, the DTSC, the Regional Board, the Corps of Engineers and DDRW, <br /> Tracy. Our comments on the Proposed Plan, as provided during the conference <br /> call , can be found in the enclosed memorandum. <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, Environmental Protection Agency, Region IX, San 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 />