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. 20 May 2004 <br /> AGE-NC Project No 98-0521 <br /> Page 5 of 9 <br /> Ground water samples collected during the 3"d quarter and 4`i' quarter 2003 sampling events were <br /> analyzed for the following <br /> • TPH-g in accordance with EPA Method 8015 Modified, <br /> • BTEX in accordance with EPA Methods 8021B or 8025B, and <br /> • The fuel additives di-isopropyl ether (DIPE), ethyl tertiary-butyl ether (ETBE), methyl <br /> tertiary-buty ether (1MTBE), tertiary-amyl methyl ether (TAME), tertiary butanol (TBA), <br /> methanol, ethanol, 1,2-dibromoethane (EDB) and 1,2-dichloroethane (1,2-DCA) In <br /> accordance with EPA Method 8260B <br /> In addition, the samples collected during the 3'a quarter 2003 were analyzed for total petroleum <br /> hydrocarbons quantified as diesel (TPH-d) in accordance with EPA Method 8015M <br /> 3.0. FINDINGS <br /> Soil stratigraphy was determined from field data collected during the July 2003 Investigation, <br /> • supplemented with boring logs recorded during previous Investigations The ground water flow <br /> direction and gradient were Inferred from the field data Dissolved petroleum hydrocarbon impact <br /> to ground water was quantified by laboratory analysis of the samples collected <br /> 31 STRATIGRAPHY <br /> Generally,bluish gray, fine-grained silt and lean clay were encountered in samples collected from <br /> soil boring MW-5 at depths between 35 feet and 40 feet bsg Medium to dark gray poorly graded fine <br /> sand with silt and poorly graded fine sand were encountered between 45 feet and 54 5 feet bsg Silty <br /> clay was encountered at approximately 55 feet bsg A boring log recorded during advancement of <br /> soil boring MW-5 is Included in Appendix B Geologic cross section A A' was generated from <br /> boring log data and depict general lithology beneath the site in cross sectional view (Figure 3) <br /> 32 ANALYTICAL RESULTS OF SOIL SAMPLES <br /> Analytes of concern were not detected in the three soil samples collected and analyzed from pilot <br /> boring MW-5 The results of the soil sample analysis are summarized in Tables 2 and 3 A copy of <br /> the laboratory report (CTEL Laboratory IDs 0307-101-1, 0307-101-3 and 0307-101-5) Is included <br /> in Appendix F <br /> i <br /> • Advanced GeoEnvironmental,Inc <br />