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June 25, 1992 <br /> ARCO Service Station No 2076, Lodi, California <br /> LABORATORY ANALYSES AND RESULTS <br /> Soil samples were submitted to Sequoia Analytical Laboratory in Sacramento, California <br /> 0 (Hazardous Waste Testing Laboratory Certificate No 1624) Soil samples collected from <br /> the former gasoline tank cavity and under the former product lines were analyzed for total <br /> petroleum hydrocarbons as gasoline(TPHg) using Environmental Protection Agency (EPA) <br /> 0 Method 8015, BTEX using EPA Method 8020, and total lead Selected soil samples were <br /> analyzed for ethylene dibromide and the soluble threshold limit concentration (STLC) for <br /> lead. Soil samples collected from the new tank cavity were analyzed for TPHg and BTEX <br /> r Soil excavated from the former gasoline tank cavity was stockpiled, sampled and analyzed <br /> for TPHg and BTEX using EPA Methods 8015 and 8020, respectively (piles 16 through 21) <br /> Samples collected from stockpiled soil piles 20 and 21 were analyzed for soluble cadmium, <br /> 10 chromium, lead, nickel, and zinc, and soil samples collected from piles 24 and 25 were <br /> analyzed for total cadmium, chromium, lead, nickel, and zinc In addition, a bioassay was <br /> conducted on soil samples collected from piles 20, 21, 24, and 25 to evaluate whether the <br /> soil was hazardous material <br /> Anal3dical Results of Samples From Former Tank Cavity <br /> r Results of analyses of soil samples collected from the western end of the former gasoline <br /> tanks indicated residual hydrocarbons were not detected except in soil sample S-14-T3W, <br /> a concentration of 2,000 ppm TPHg was detected (Table 2). Residual hydrocarbons were <br /> detected in soil samples collected from under the eastern end of the former tanks (8 1 to <br /> 17,000 ppm TPHg) A concentration of 24,000 ppm TPHg was detected in soil sample S-14- <br /> T3ESW collected from the sidewall adjacent to the station building, BTEX concentrations <br /> were 160 ppm, 980, 260, and 1,500, respectively EDB was not detected in soil samples <br /> analyzed from under the former tanks. Total lead concentrations ranged from 7 5 to 14 <br />• ppm Copies of laboratory results are in Appendix B. <br /> 30008-3 5 <br />