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If 4VIRC Pi.FiN T AL HEALTH <br /> PPRR',P-r 5i RVICC <br /> Unramar 93 JUH 14 Ph 1: 56 <br /> Telecopy: 209-584-6113 Credit&Wholesaie <br /> Ultramar Inc. 209-583-3330 Administrative <br /> P'O go"465 209-583-3302 Information Services <br /> 525 W.Third Street 209-583-3358 Accounting <br /> Hanford,CA 93232-0466 <br /> (209)582-0241 <br /> June 10, 1993 <br /> Mr. Tom Stoflet <br /> Assistant Chief, Environmental Services <br /> Wells Fargo Bank <br /> 2785 Mitchel Drive <br /> Second Floor <br /> Walnut Creek, CA 94598 <br /> SUBJECT: ULTRAMAR STATION NO. 696, 2448 WEST KETTLEMAN LANE, LODI, CALIFORNIA <br /> Dear Mr. Stoflet: <br /> As per your request, enclosed are copies of the boring logs, soil boring <br /> laboratory data, a quarterly monitoring report which includes ground-water from <br /> all the existing wells of third quarter 1990, vapor extraction data from the <br /> .' off-site vadose wells, and a soil gas survey that was completed for the <br /> above-referenced site just prior to destruction of the off-site vadose wells. <br /> The enclosed data shows that trace amounts of BTEX were detected in soil <br /> samples collected from borings MW-16, MW-17 and MW-18. Soil samples collected <br /> from borings for the installation of MW-22, MW-29, MW-30 and MW-31 all <br /> contained non-detectable concentrations of BTX and Other Volatile <br /> Hydrocarbons. Vapor extraction was later connected to MW-16, MW-17, MW-18 and <br /> MW-30. The vapor extraction results in December 1990 indicate that MW-17, <br /> MW-18 and MW-30 were less than 50 parts-per-million vapor {ppmv} and MW-16 <br /> exhibited 150 ppmv. In January 1991 MW-16 was retested and exhibited no <br /> detectable hydrocarbon vapor. <br /> As you are probably aware ppmv is measured as a vapor and the results in ppmv <br /> are always much higher than an actual laboratory measurement of hydrocarbon in <br /> soil , measured on a weight to weight basis in parts per million. Soil data for <br /> MW-33 could not be found in the file, however all ground-water samples from the <br /> well were non-detect <br /> 4 <br /> BEACON <br /> f <br /> rik (?u:�fitc end tirr�icc <br /> A Member of the Ultramar Group of Companies <br /> utKaffw <br />