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r <br /> SECTIONONE Introduction <br /> As mentioned above, Appendix A contains the boring logs Analytical laboratory reports are in <br /> Appendix B <br /> 1.2 SITE HISTORY AND ENVIRONMENTAL SETTING <br /> rThe site is located in Stockton, California in an area of mixed light-industrial and commercial <br /> buildings The site is part of a much larger property that is used for repair of railroad engines by <br /> the CCTC The investigated area is a gravel-covered parking area and road A railroad spur and <br /> a metal-sided building are on the eastern side, another metal-sided building and two shipping <br /> containers are located on the western side (see Figure 1) To the south is a railroad spur with a <br /> parked locomotive that is used as a power supply To the north is a large gravel covered area <br /> On January 26, 1999, a 6,000-gallon gasoline underground storage tank (UST) and a 1,000- <br /> gallon diesel fuel UST were removed by Thorpe Oil from locations flanking the metal-sided <br /> building on the east Soil samples were collected by Thorpe Oil from under the ends of the <br /> gasoline tank (Tank 1) at 13-ft bgs The samples were ND (not detected above the laboratory's <br /> reporting limit) for TPH-gasoline, MTBE, and BTEX <br /> Soil samples were collected from under the ends of the diesel tank (Tank 2) at 9-ft bgs The <br /> sample from under the western end of the tank was ND for all analytes The sample from under <br /> the eastern end had 8,000 mg/kg TPH-diesel, 330 µg/kg toluene, 740 µg/kg ethylbenzene, and <br /> 1,800 µg/kg total-xylenes (benzene was ND) The sample from the spoil pile had 170 mg/kg <br /> TPH-diesel (BTEX compounds were not analyzed from the spoil pile) <br /> r <br /> r <br /> r <br /> • <br /> r <br /> URS Greiner Woodward Clyde 11099670491UST REPORT CHEROKEE DOC.22 SEP 99llOAK 1-2 <br />