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i <br /> con%i%tent with local trends and previous gradient calculatrons <br /> 4.4 Analytical Results of Groundwater Samples <br /> TPH as gasoline was detected in MW-2 and MW-4 at concentrations of 160 parts per billion <br /> I (ppb) and 880 ppb respectively TPH as diesel was also detected in MW-4 at a concentration <br /> of 2,800 ppb Benzene, ethylbenzene and xylenes were detected in MW-1, MW-2 and MW-4 <br /> Toluene was also detected in MW-4 No petroleum hydrocarbons were detected in MW-3 <br /> The analytical results are summarized on Table 2 The laboratory report and chain-of- <br /> custody are included in Appendix D <br /> TABLE 3 <br /> ANALYTICAL RESULTS of GROUNDWATER SAMPLES <br /> Grant Line Gas & Food <br /> 2424 Grant Line Road <br /> µg/L <br /> I Sample Sample TPH as TPH as Benzene Toluene Ethyl- Xylenes <br /> Location Date gasoline diesel benzene <br /> MW-1 1-11-94 310 ND 43 08 ND 11 <br /> 4-13-94 120 160 46 ND ND ND <br /> 12-9-94 ND ND 16 ND 3 1 094 <br /> MW-2 1-11-94 2,300 ND 12 11 ND 42 <br /> 4-13-94 190 ND 23 ND ND 5 3 <br /> 12-9-94 160 ND 29 ND 068 11 <br />' MW-3 1-11-94 ND ND ND ND ND ND <br /> 4-13-94 ND ND ND ND ND ND <br />' 12-9-94 ND ND ND ND ND ND <br /> MW-4 12-9-94 880 2,800 170 4 0 36 66 <br />' Ng/L= parts per bdllon ppb <br /> ND = not detected <br />' 5.4 CONCLUSIONS AND RECOMMENDATIONS <br />' 5.1 Hydrocarbon Impacted Soil <br /> Only low concentrations of petroluenr hydrocarbons have been detected in soil samples <br /> collected at the site TPH as gasoline has been detected at concentr atrons up to 40 ppnl (139- <br /> 1 0), TPH as diesel has been detected at concentrations up to 40 ppm (136-15), benzene has <br /> been detected at concentrations up to 0 13 ppm (137-5) Only localized areas of petroleum <br /> hydrocarbons have been detected, and no significant contaminant plume appears to be <br /> 0-1-9-1 A-44$a-�I— (� <br /> 549401:JOM02n .t Lw Ou A Pond OR 1112 W 9 <br /> 1 <br />