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! I O'May 2004 . AGE-NC Project No. 98-0520 ! Page 3 of 6 3.2. SOIL AND GROUND WATER ANALYSES Ground water and selected soil samples from the above investigation were analyzed for the following constituents: Total petroleum hydrocarbons quantified as gasoline and diesel (TPH-g- and TPH-d) iri accordance with EPA Method 8015M; ' Volatile organic compounds,including benzene,toluene, ethyl benzene and xylene(BTEX) and the fuel additives methyl tertiary- butyl ether (MTBE), tertiary butanol (TBA), ! di-isopropyl ether (DIPE), ethyl tert-butyl ether (ETBE), tert-amyl methyl ether (TAME), 1,2-dichloro ethane (1,2-DCA) and 1,2-dibromoethane (EDB) in accordance with EPA Method 8260B. ! In addition, selected soil samples were sent to Cooper Testing Laboratory and analyzed for the physiochemical properties of porosity, moisture, density and total organic carbon. 4.0. FINDINGS Soil descriptions(lithologies)were determined from field data,supplemented with soil descriptions from previous site assessments. Petroleum hydrocarbon impacts to soil and ground water were ! characterized from field and laboratory analytical data. ! 4.1. SOIL PROFILE The soil boring samples indicate that the vertical soil profile consisted of a tan and white to brown, ! generally medium- to coarse-grained sand from the surface to approximately 15 feet bsg, gray to brown silt with clay from 15 to approximately 30 feet bsg,-and brownish gray to tan sand,'ranging from fine-grained sand at approximately 35 feet to coarse-grained sand at approximately 40 bsg: Petroleum hydrocarbon-like odor was not detected in any of the collected soil samples.Using a PID, barely detectable concentrations of organic vapor were measured in several soil samples, at ' maximum concentrations of 3 parts per million(ppm) and 2 ppm in soil samples B5-35 and B6-20, respectively (Appendix B). ! Four soil samples, one from the upper sand layer, two from the-middle silt and clay layer and one . from the lower sand layer were collected from soil boring B5 and analyzed for geotechnical ! properties.The samples 135-10 and B5-40 were described as brown sand an brown sand with silt and trace gravel, with porosities at between 34.5% and 30.6%, low organic content (0.4 to 0.6%), and • specific gravity values at between 2.67 and 2.72. ! Advanced GcoEnvironmental,Inc.