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• <br /> vCalifornia Regional Water Quality Control Board <br /> Central Valley Region <br /> Robert Schneider, Chair <br /> Alan C.Lloyd,Ph.D. Arnold <br /> Secretaryfor Sacramento Alain Offiee Schwaraenegger <br /> Environmental 11020 Sun Center Drive#200,Rancho Cordova,Cali l'omin 95670-6114 IUIECE#vg� Governor <br /> Protection Phone(916)464-3291 °FAX(916)464-4645 W IIV�_ <br /> http://www.wateTboards.ca.gov/ccnti'alvallcy <br /> JUL 12 2005 <br /> 8 July 2005 ENVIRONMENT HEALTH <br /> PE"M[T/SERWCES <br /> Mr. Robert Garcia <br /> Leprino Foods, hic. <br /> 1830 West 381h Avenue <br /> Denver, CO 80217 <br /> INTERIM GROUNDWATER CLEANUP PLAN, LEPRINO FOODS COMPANY, TRACY, SAN <br /> JOAQUIN COUNTY <br /> Staff of the Central Valley Regional Water Quality Control Board (Regional Board) has reviewed the <br /> 2 March 2005 Groundwater Cleanup Plan, Leprino Foods Company Plant, Tracy, California (Cleanup <br /> Plan) submitted on your behalf by Geotrans, Inc. for the groundwater diesel fuel pollution (TPHd) <br /> emanating from the Leprino Foods Company(Leprino)plant in Tracy. Leprino has operated a <br /> groundwater extraction and treatment system since 22 May 1996 to recover separate phase hydrocarbons <br /> (SPH) and establish gradient control over the TPHd plume, however, SPH persist in the source area. <br /> Also, the furthest downgradient monitoring well, MW-19, contained 420 ug/l TPHd in the 4th quarter <br /> 2004 sampling event. Leprino submitted the Cleanup Plan in response to our 31 December 2004 letter <br /> requesting that Leprino submit a final cleanup plan that addresses both the source area and the <br /> downgradient plume and define the steps they intend to take to bring this project to closure. Further <br /> clarification of the Cleanup Plan was provided on 5 July 2005 in a telephone conversation with Brendan <br /> Shine of Geotrans. <br /> The Cleanup Plan recommends five phases of additional work: <br /> 1. Limited additional site characterization consisting of a Geoprobe R or equivalent survey in the source <br /> area to determine the areas of maximum remaining SPH and petrolcu n-saturated soil. This information <br /> will be used to determine the locations of additional SPH recovery points. <br /> 2. Installation of a second groundwater extraction well to serve as a backup to existing extraction well <br /> EW-2 and to recover product. <br /> 3. Existing monitoring wells MW-3 and MW-4 in the SPH area will be equipped with product recovery <br /> pumps. Existing groundwater extraction well RW-5A,which is in the source area but has small <br /> groundwater production, will be evaluated for a product recovery pump. Two new wells will be <br /> installed in the central area near the groundwater extraction wells to document the cone of depression, <br /> and will be equipped with product recovery pumps to enhance SPH recovery. <br /> California Environmental Protection Agency <br /> CO Recycled Paper <br />