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STATE OF CALIFORNIA PETE WILSON, Governor <br /> ,CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD— ®RM CENTRAL VALLEY REGION <br /> 3443 ROUTIER ROAD, SUITE A <br /> SACRAMENTO, CA 95827-3098 <br /> PHONE: (916) 361-5600 <br /> FAX: (916) 361-5686 <br /> 13 March 1991 MAR 1 8 1Rt <br /> ENVIRONMEIIITAI- HEALTH <br /> Mr. Abel Haines PERMIT/SERVICES <br /> Director of Environmental Program Office <br /> Defense Distribution Region West, Sharpe Site <br /> Lathrop, CA 95331 <br /> FOCUSED FEASIBILITY STUDY, PRELIMINARY DRAFT, DEFENSE DISTRIBUTION REGION WEST <br /> (DORW), SHARPE SITE, SAN JOAQUIN COUNTY <br /> We have reviewed the Focused Feasibility Study (FS) for the Central Area at <br /> the DDRW, Sharpe Site. We find the FS to be quite comprehensive with respect <br /> to treatment technologies, however additional information must be included in <br /> future drafts prior to our concurrence with the selected remedial measure for <br /> the Central Area. <br /> Enclosed is a memorandum which discusses the areas of the FS that need to be <br /> revised or amended. The methodology for the installation of the extraction <br /> wells needs to be revised and our concerns with the well design, placement and <br /> pumping schemes need to be addressed. In addition, the FS reviewed only <br /> limited number of disposal alternatives. We request that the FS consider the <br /> reuse/recycle disposal alternatives and the associated benefits. <br /> The Focused FS for the Central Area should be revised to incorporate our <br /> concerns and comments. We suggest that we discuss specific proposals in the <br /> FS with you and your consultants at the next Technical Review Committee <br /> meeting. <br /> If you have any questions, please call me at (916)361-5670. <br /> CAMILLA WILLIAMS <br /> Engineering Geologist <br /> CKW:cw <br /> Enclosures <br /> cc: Mr. John Hamill , Environmental Protection Agency, Region IX, San <br /> Francisco <br /> Mr. Jim Pinasco. DeDartment of Health Services. Reoion 1 . Sacramento <br /> rrea Aautman, Jan Uoaquln I'UDIIC Heaitn ,)ervices, Uivislon or <br /> Environmental Health, Stockton <br /> Mr. Craig MacPhee, U. S. Army Toxic and Hazardous Materials Agency, <br /> Aberdeen Proving Ground, Maryland <br /> i <br />