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ENvlRO.»tE HIPC VROTCCTION <br /> JEYAR"I LIEN-I OF "I OXIC SUL'SIANCLS CCUi:I Rut- <br /> Region 1 <br /> 10151 Croydon Way, Suite 3 <br /> : ate <br /> Sacramento,CA 95627-2106 - 7 <br /> (716)855-7700 October 1 8 , 1991 <br /> _ <br /> Ll <br /> OCT 2 2 1991 <br /> Mr. Marshall Cloud ENVIRONMENTAL HEALTH <br /> Defense Distribution Region West KRMIT/SERVICES <br /> DDRW-DE <br /> 25600 South Chrisman Road <br /> 1 Tracy, CA 95373-5000 <br /> Dear Mr. Cloud: <br /> REVIEW OF REMEDIAL INVESTIGATION/FEASIBILITY STUDY (RI/FS) <br /> ACTIVITIES AT DEFENSE DISTRIBUTION REGION WEST (DDRW) , TRACY <br /> SITE <br /> 1 <br /> The enclosed memorandum provides the Department of Toxic <br /> Substances Control ' s (Department) comments and recommendations <br /> i regarding the RI/FS activities at DDRW Tracy. The memorandum <br /> encompass two documents: 1) the RI/FS Engineering Report <br /> ' produced by Woodward Clyde Consultants and 2) the follow on <br /> statement of work (SOW) . <br /> Our goals for this memorandum are not only to finalize <br /> t comments for Woodward Clyde Consultants Engineering Report and <br /> SOW, but more importantly to provide guidance for future RI/FS <br /> activities. We have two primary recommendations for a second <br /> phase RI/FS. First, expansion of the ground water treatment <br /> system and refinement of contamination plume boundaries must <br /> 1 remain a priority. Secondly, the investigation of other <br /> potential hazardous waste sites should be based on available <br /> data. We feel broad exploratory investigations would be a <br /> waste of valuable resources. <br /> We look forward to working with you in bringing the RI/FS <br /> at DDRW Tracy to a successful conclusion. Should you have any <br /> questions regarding our comments, you may contact Jim Pinasco <br /> of my staff at (916) 855-7874 . <br /> Sincerely, <br /> _ c <br /> David Wang, � , Chief <br /> Federal Facilities Unit <br /> Site Mitigation Branch <br /> cc: See next page. <br />