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STATE OF CALIFORNIA—ENVIRONMENTAL PRION AGENCY PETE WILSON,Goma r <br /> CALIFORNIA PEGIONAL WATER QUALITY CONTROL BOARD— <br /> CENTRAL VALLEY REGION <br /> 3443 ROUTIER ROAD,SUITE A <br /> SACRAMENTO,CA 95827-3098 e„ ,r•° <br /> PHONE: (916)255-3000 (J5 AIL 7 AV 11: 00 <br /> FAX: (916)255-301S <br /> Mr. John Ewing 14 July 1995 <br /> Leprino Foods <br /> 1830 West 38th Avenue <br /> P.O. Box 8400 <br /> Denver, CO 80201-8400 <br /> LEPRINO FOODS REMEDIAL ACTION PLAN, SAN JOAQUIN COUNTY, (CASE <br /> No. 3327) <br /> We have reviewed the 30 June 1995 Remedial Action Plan prepared by Hydro-Search for <br /> Leprino Foods in Tracy. The proposed remedial action plan (RAP)consists of <br /> constructing a series of ground water extraction wells to gain hydraulic control and to <br /> recover free and dissolved product. Extracted ground water would be discharged to <br /> Leprino's waste water pretreatment system prior to off-site discharge to a publicly owned <br /> treatment works. The plan is acceptable provided the following comments are responded <br /> to. <br /> The RAP indicates up to six recovery wells will be installed at the downgradient edge of the <br /> free-product plume. The plan indicates initially three extraction wells will be installed and <br /> tested short-term before three additional wells, if necessary, are installed. Which three <br /> recovery wells are being selected for the short-term test? What is the anticipated radius of <br /> influence of the extraction wells? What criteria will be used to determine how many <br /> additional extraction wells will be required? What remedial measures are being considered <br /> for the dissolved hydrocarbon plume? <br /> Monitoring well MW-14 at the western side of the Leprino facility, installed in February <br /> 1995, has free product, indicating the free-product plume is larger than previously thought. <br /> An additional monitoring well west of MW-14, likely to be off-site, is needed to fully <br /> define the extent of the hydrocarbon plume. Will extraction wells recover ground water <br /> near MW-14? <br /> Please respond to our questions by 31 July 1995. If you have any comments, please <br /> contact me at(916) 255-3121. <br /> PATRICK MORRIS <br /> WRC Engineer <br /> cc: San Joaquin Public Health Services, Stockton <br /> Mr. Roy Greengrass, Leprino Foods, Tracy <br /> Mr. Chris Williams Hydro-Search, Golden, Colorado <br />