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ETS ENVIRONMENTAL PROJECT 301 <br /> PAK 3 <br /> L <br /> 4. 0 FINDINGS <br /> The following findings were made while conducting. g the <br /> scope of work outlined above. <br /> L <br /> 1 Diesel levels ranging from 4, 4 ppm to 1. .1 ppm were <br /> found in baring 8. <br /> ILih Diese1 levels ranging from 0. 7 ppmto non-detect were found in boring 9. <br /> 3. No odor or discoloration was noted at any time <br /> during the drilling of borings 8 and 9. <br /> 4: Benzene was not found in any of the samples. <br /> Ss Oil and grease analysis of the waste oil tank 1 <br /> 610 <br /> samples indicate levels ranging from 60 ppm to 0 <br /> Ppm. Vil, <br /> L <br /> 6: All other hydrocarbon analyses for the waste oil <br /> L <br /> tank sample indicate non-detect levels. <br /> 7, A ewen=T&Qe odor was noted in shallow cuttings of <br /> r boring 10. The boring' s proximity to a storm_ drain <br /> L is a likely cause of the odor. <br /> i <br /> L <br /> 5. 0 CONCLUSIONS <br /> Laboratory evidence confirms the presence of low level <br /> diesel contamination in close proximity to the two pump <br /> rislands. The levels encountered are not indicative cif a <br /> L; major leak event, The locations of the borinags, near cracks <br /> between the asphalt and concrete, lead ETS to believe that <br /> the presence of diesel in the soil is a result of <br /> infiltration, of runoff from water used to wash the island <br /> areas. <br /> LRecent precision tests of the tanks and their associated <br /> pipelines indicate that the tanks and lines are tight. There, <br /> is no evidence that: there . is significant gasoline or diesel <br /> contamination at the site. <br />