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1 ' 05 December 2002 AGE-NC Project No 02-0964 ' Page 5 of 7 ' Volatile organic compounds (VOCs), including benzene, toluene, ethylbenzene and xylene (BTEX) and the fuel additives methanol, ethanol, ethylene dibromide (EDB), 1,2-dichloroethane(1,2-DCA),tertiary butanol(TBA),di-isopropyl ether(DIPE), ethyl tert ' butyl ether(ETBE),tert amyl methyl ether(TAME),methyl tertiary-butyl ether(MTBE),by EPA Method 8020/8260 Modified 1 4.0. FINDINGS ' Ground water elevation, flow direction and gradient were determined from field data collected on 28 October 2002, the contaminant impact to ground water was assessed from the ground water ' laboratory data ' 4 1 GROUND WATER ELEVATION AND GRADIENT During the October 2002 ground water monitoring event, depths to ground water ranged between 27 60 and 28 17 feet below the tops of well casings, ground water elevations were calculated to be between 17 22 feet(MW-1)and 15 91 feet(MW-3)below mean sea level (MSL) The ground water was inferred to flow east to northeast at a gradient of approximately 0 01 ft/ft (Figure 3) ' Ground water table elevation at the site decreased an average 1 foot between the January and October 2002 ground water monitoring events I 4 2 LABORATORY RESULTS OF GROUND WATER SAMPLES TPH-g and TPH-d were detected at concentrations of 21,000 micrograms per liter(µg/1)and 93 µg/1, Irespectively, in ground water sample MW-1 BTEX compounds were detected in same ground water sample at concentrations of 370 µg/l benzene, 90 µg/1 toluene, 1,500 µg/1 ethylbenzene and 4,170 µg/l total xylenes No other target analytes were detected In the samples analyzed Analytical results of the monitoring well ground water samples are summarized In Table 2 The laboratory reports(CTEL I D 0210-220-1 to-3),quality assurance and quality control and chain-of-custody forms are presented in Appendix B I i Advanced GeoEnvironmental,Inc I