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T1 I <br /> k" K L E 1 N F E L D E R <br /> 94 FES -3 PIN 2: 03 <br /> January 5, 1994 <br /> File: 24-220176-E00 �5 <br /> Mr. John Ewing <br /> Leprino Foods <br /> P.O. Box 173400 <br /> Denver, Colorado 80217-3400 <br /> Subject: Summary of Geoprobe Investigation <br /> Leprino Foods Facility <br /> 2401 McArthur Drive <br /> Tracy, California <br /> Dear Mr. Ewing: <br /> Kleinfelder has completed the Geoprobe investigation of the subject facility diesel fuel spill. <br /> The Geoprobe investigation was performed to provide preliminary groundwater data to <br /> optimize the location of permanent monitoring wells. Soil samples were also collected <br /> surrounding the former diesel fuel soil excavation to further assess soil conditions. This letter <br /> summarizes the field procedures used, results of data collected, interpretation of findings, and <br /> recommendations for further investigation. <br /> GROUNDWATER INVESTIGATION FINDINGS <br /> A total of eight Geoprobes, identified as GP-1 through GP-8, were driven at the locations <br /> shown on Plate 1 - Geoprobe Location Map. The Geoprobes, consisting of 3/4 inch diameter <br /> galvanized steel pipe, were driven to a depth where first groundwater was encountered (19.5 to <br /> 24.5 feet). In most cases, samples were then obtained through the Geoprobe pipe, the first 5 <br /> feet of which has slots open to the soil, with a stainless steel bailer. At two locations, GP-2 <br /> and GP-3, groundwater did not freely enter the Geoprobe pipe, possibly due to smearing of the <br /> slots by clay in the soil, consequently the pipe was removed and a groundwater sample was <br /> bailed from the open boring. Table 1 summarizes sample I.D. numbers, sample depths, and <br /> other field information. <br /> The groundwater samples were analyzed for TPH extractable by EPA Method 8015/3550 <br /> (diesel range) by Superior Precision Analytical, Inc. The results of these analyses are <br /> provided in Appendix A and are presented on Plate 2. Groundwater samples were also <br /> collected by Kleinfelder for Ms. Polly Lowry of the California Regional Water Quality <br /> Control Board (CRWQCB) and were reportedly analyzed for EPA 602, Purgeable Aromatics. <br /> This report does not address the CRWQCB data which was not available to Kleinfelder at the <br /> time of this report. <br /> 24-220176-E00/CR30-1 Page 1 of 3 January 5, 1994 <br /> Copyright 1994 Kleinfelder, Inc. <br /> KLEINFELDER 3077 Fite Circle, Sacramento, CA 95827 (916) 366-1701 <br />