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0 <br /> 4.0 RESULTS <br /> • 4.1 FIELD OBSERVATIONS <br /> During the tank removal program, Blaes Environmental noted that the former underground gasoline and <br /> diesel fuel tanks were in good condition with no holes. The soil below the tanks, dispenser island, and <br /> associated distribution piping did not appear to be stained and did not emit a petroleum hydrocarbon odor. <br /> 4.2 ANALYTICAL RESULTS <br /> A summary of the tank closure soil sample results is presented in Table 3. The laboratory reports including <br /> chain-of-custody and quality control documentation are included in Appendix D. Oxygenate Compound <br /> analysis is not presented in the table but is presented in Appendix D. <br /> Table 3 <br /> Laboratory Results of Tank Removal Soil Sampling Program <br /> Sample TPH G TPH-D Benzene Toluene Ethyl- - Total - Total <br /> I.D. 8015 8015 (ppm) (ppm) benzene Xylenes Lead <br /> (ppm) (ppm) : :.(ppm) (ppm) (PPm) <br /> Tl-1 ND ND ND ND ND ND 5.8 <br /> TI-2 ND ND ND ND ND ND 5.0 <br /> is <br /> T2-1 ND ND ND ND ND ND 7.5 <br /> T2-2 ND ND ND ND ND ND 7.3 <br /> D-1 ND ND ND ND ND ND 6.8 <br /> D-2 ND ND ND ND ND ND 6.7 <br /> SP-1/2 ND 5.8 ND ND ND ND NA <br /> SP-3/4 ND 14 ND ND ND ND NA <br /> SP-5/6 15 250 ND ND ND 0.032 NA <br /> Notes: TPH-G -Total Petroleum Hydrocarbons as Gasoline using EPA Method 8015 Modified <br /> TPH-D -Total Petroleum Hydrocarbons as Diesel using EPA Method 8015 Modified <br /> ppm -parts per million(milligrams per kilogram) <br /> ND -not detected above the laboratory method reporting limit <br /> NA -not analyzed <br /> The laboratory analysis indicated that the soil samples collected below the former underground gasoline and <br /> diesel fuel storage tanks and dispensers did not contain detectable petroleum hydrocarbon concentrations <br /> above laboratory reporting limits. Laboratory analysis indicated that the soil samples collected as <br /> composites from the stockpiled soil at the site contained concentrations of diesel fuel ranging from 5.8 to <br /> 250 parts per million. Further, one of the three composite soil samples contained a TPH-G concentration <br /> . of 15 parts per million and a total xylenes concentration of 0.32 parts per million. <br /> 7 <br />