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n Qr) <br /> 06 March 2002 <br /> AGE-NC Project No 01-0865 <br /> Page 5 of 9 <br /> 3 6 GRAB GROUND WATER ANALYSES <br /> Each grab ground water sample was analyzed for <br /> • TPH-g in accordance with EPA Method 8015 Modified, <br /> • BTEX in accordance with EPA Method 8020, and <br /> • Fuel additives including MTBE, TBA, DIPE, ETBE, TAME, methanol, ethanol, EDB and <br /> 1,2-DCA by EPA Method 8260B <br /> 3 7 EQUIPMENT DECONTAMINATION <br /> Prior to sample collection, Geoprobe soil and ground water sampling equipment was thoroughly <br /> rinsed with clean water after washing with a solution of Alconox Geoprobe rods were thoroughly <br /> cleaned prior to soil probe boring advancement <br /> 4.0. FINDINGS <br /> Soil descriptions were utilized to construct the site geological model, laboratory analysis of soil and <br /> ground water samples were utilized to assess the petroleum hydrocarbon-impact on soil and ground <br /> water <br /> 41 SOIL PROFILE <br /> Except for borings on the levee, generally, black, moist, peat was encountered from surface grade <br /> to approximately 10 feet bsg Grayish green, moist to saturated, sand to silty sand was encountered <br /> from 10 feet bsg to approximately 20 feet bsg, from 24 feet to 26 feet bsg and from 34 to 39 feet bsg <br /> Dusky green,damp to very moist, silt and clay were encountered at all other depths Boring logs are <br /> included in Appendix A Lines of cross section are illustrated on Figure 2 and geologic cross sections <br /> are depicted on Figures 3 and 4 <br /> Hydrocarbon odor was not observed in the soil samples from the borings Organic vapor was <br /> detected in the soil samples collected from boring B7, located near the former UST site at <br /> concentrations as high as 261 parts per million {13745} Organic vapor field measurements are <br /> included on the boring logs in Appendix A <br />