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• MEMORANDUM <br /> CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD - CENTRAL VALLEY REGION <br /> 3443 Routier Road, Suite A Phone: (916) 255-3000 <br /> j Sacramento, CA 95827-3098 CALNET: 8 494-3000 <br /> TO: Wendy L. Cohen FROM: Polly L. Lowry <br /> i <br /> Senior Engineer Associate Engineering Geologist <br /> DATE: 27 May 1994 SIGNATURE: 6 ' <br /> SUBJECT: GROUND WATER ASSESSMENT REPORT, LEPRINO FOODS, TRACY, SAN <br /> JOAQUIN COUNTY <br /> I have reviewed the 13 April 1994 report entitled Ground Water Assessment Report (GWAR) <br /> submitted by Kleinfelder for the Leprino Foods facility at 2401 MacArthur Drive in Tracy. <br /> Kleinfelder's recommendation to use geoprobes to determine the placement of monitoring wells to <br /> define the extent of ground water contamination is acceptable. However, Leprino needs to submit a <br /> work plan detailing the estimated number and locations of the geoprobes and monitoring wells and a <br /> schedule for the geoprobe investigation, installation of the monitoring wells, and submittal of a <br /> report of findings. <br /> Kleinfelder states in the GWAR that EW-1 was pumping for five days prior to sampling EW-1 and <br /> MW-2 on 28 February 1994. If three gallons per minute were being pumped from EW-1, as <br /> estimated by Kleinfelder, then approximately 22,000 gallons of water was extracted from EW-1 in <br /> this five day period. Since we have not received any analytical results from the oil/water separator <br /> and we do not know if the proper permits from the City of Tracy have been obtained, this discharge <br /> may be in violation of the current NPDES permit. Leprino should provide us with information on <br /> when ground water extraction from EW-1 began, the extraction rates, where the water was <br /> discharged, the volumes of water discharged, if and when the oil/water separator was installed and <br /> made operational, and the results of any samples taken from the oil/water separator. <br /> Summary <br /> The recommendations by Kleinfelder to use geoprobes to determine the placement of monitoring <br /> wells to define the extent of ground water contamination is acceptable, but a work plan and a time <br /> schedule for the investigation and report of findings are needed. In addition, Leprino should <br /> provide the results of samples collected from the oil/water separator and information on the <br /> operation of the ground water extraction and treatment system. <br /> PAL:sjs <br />