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i <br /> I <br /> Handing Lawson Associates <br /> } concentration of 37 m in this <br /> .reported at a concentrations of 390 ppm, and diesel at a conce pp <br /> sample. <br /> Benzene, toluene, xylenes, and ethylbenzene were not detected above laboratory <br /> detection limits (0.025 ppm for benzene and toluene, and 0.075 ppm'for xylenes and <br /> t <br /> ethylbenzene) in any of-the soil samples, with the exception of•0.065 ppm of toluene <br /> reported in sample PP4-3. <br /> .Organic lead was:not.detected l In any.of. the.analyzed soil-samples. EDB was <br /> a- -- --- __ .._. . <br /> detected in three samples (TS-14, PPI-3, and PP4-3) at concentrations ranging from <br /> 0.180 to 0.370 ppm, and was not detected above a detection limit of 0.125 ppm in the <br /> other samples, <br /> f <br /> Based on HLA's review of LF's November 9, 1989 report, it appears that a ' <br /> l limited release of.petroleum'hyd-rocarb4ns'has-occur-F6d-at"the site in the vicinity"of'th <br /> tf dispenser, and has impacted the.soil in that area-I From the absence of TPH as gasoline <br /> I <br /> in samples with detectable concentrations of EDB at the site, it appears unlikely that the <br /> EDB is associated with a-gasoline release at the site. Since EDB is known to have been <br /> used widely in.rural areas for agricultural purposes, its introduction into site soils is <br /> possibly associated with past-agricultural usage in the vicinity. <br /> ' I <br /> I <br /> I <br /> T19461-H 7 of 20 <br />