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1 2 3 Cone <br /> - Penetration Testing and Discre..te Sampling and Analysis <br /> On April 25, 2000, to evaluate the vertical extent of impacted soil and groundwater, <br /> Gregg Drilling and Testing, Inc (Gregg), a state licensed drilling contractor (C-57 <br /> #656407), advanced a cone penetration test (CPT) boring and collected discrete soil and <br /> groundwater samples at one on-site location <br /> rSoil samples were collected into stainless steel sample sleeves with a push-driven soil <br /> sampler at 65, 70 and 74 feet bgs All three soil samples contained relatively low <br /> concentrations of at least one compound analyzed The sample collected at 65 feet <br /> contained 10 mg/kg of TPH-as-gasoline, 0 15 mg/kg of benzene, 0 14 mg/kg of toluene, <br /> 0 26 mg/kg of ethylbenzene, and 0 73 mg/kg of xylenes The sample collected at 70 feet <br /> only contained 0 0071 mg/kg of toluene, and the sample collected from 74 feet only <br /> contained 0 02 mg/kg of toluene, 0 0068 mg/kg of ethylbenzene and 0 05 mg/kg of <br /> xylenes The five oxygenate compounds, 1,2-dichloroethane (1,2-DCA) and EDB were <br /> not detected in any of the three soil sample analyses <br /> Based on the CPT and pore pressure dissipation data, groundwater-bearing sand and <br /> gravel sequences were identified beneath the groundwater table at approximately 60 and <br /> 105 feet bgs Gregg discretely sampled the groundwater interval at 60 feet bgs using a <br /> SimulProbe As directed by the PHS/EHD inspector, the groundwater interval at 105 feet�� ` <br /> was not sampled The groundwater sample collected at 60 feet bgs contained 5,700 µg/l <br /> of TPH-as-gasoline, 76 µg/I of benzene, 61 pg/l of toluene, 53 µg/l of ethylbenzene, 280 <br /> µg11 of xylenes, and 11 jig/] of 1,2-DCA The five oxygenate compounds and EDB were A6 <br />' <br /> not detected in the groundwater sample <br /> ✓1o1e� <br /> �1 ` Svt C� <br /> 5 <br /> r <br />