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11 <br />June 2, 1992 <br />File: 24-220152-B00 <br />Mr. Steve Keeter <br />San Joaquin County <br />Department of Capital Projects <br />County House; Room 678 <br />Stockton, CA 95202 <br />Subject: Tl Tank Removal and Closure Report <br />San Joaquin County General Hospital <br />French Camp, California <br />Dear Mr. Keeter: <br />L] <br />JUN 3 1792 <br />Per our discussion, this letter report documents the removal and soil verification sampling <br />at the T1 tank site north of the engineering offices at the San Joaquin County General <br />Hospital. A copy of this letter report is being sent to Mr. Bill Snavely of the San Joaquin <br />County Department of Public Health, Environmental Health Division (SJCEHD) for their <br />records and to obtain final closure of the T1 site. <br />In September and October of 1991, Kleinfelder conducted an investigation of two tank sites <br />(Site T1 and Site T2/3) at the San Joaquin County General Hospital Complex in French <br />Camp, California (Plates 1 and 2). A geophysical survey was conducted to evaluate the <br />locations of the tanks, and a limited boring program was performed to assess the potential <br />that the tanks may have leaked. <br />At the Tl site, a boring was drilled within 5 feet of each end of the tank to a depth of <br />approximately 25 feet (Plate 3). Ground water was not encountered. Soil samples were <br />collected at 5 -foot intervals from each of the borings, classified and screened with an <br />organic vapor detector. Based on the depth in the borehole, photoionization detector <br />(PID) readings, and the intent of the project, five samples were submitted for quantitative <br />analysis. The samples were analyzed for extractable total petroleum hydrocarbons (TPH) <br />as diesel; purgeable TPH as gasoline; benzene, toluene, ethylbenzene, and xylenes <br />(BTEX); ethylenedibromide (EDB); and total lead. The five samples submitted were not <br />reported to contain extractable TPH, purgeable TPH, BTEX, or EDB. Lead was reported <br />in three of the five samples at concentrations typical of background in the Central Valley. <br />Analytical results were presented in Kleinfelder's Soil Assessment Report dated <br />December 6, 1991. <br />Based on the analytical results, San Joaquin County contracted Kleinfelder to arrange for <br />the removal of Tank T1. Kleinfelder contracted Scrivner Environmental Services <br />(Scrivner) to provide permitting, tank removal, tank disposition, and excavation backfilling. <br />This report summarizes the field activities and presents the analytical data associated with <br />the verification sampling upon tank removal. <br />FR3-92-34 Page 1 of 3 <br />Copyright 1992 Kleinfelder, Inc. <br />KLEINFEL.DER 3077 Fite Circle, Sacramento, CA 95827 (910) 366-1701 <br />