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' 26 May 2004 . AGE-NC Project No 99-0637 ' Page 2 of 4 ' of Health Services (DHS)-certified analytical laboratory, for analysis The samples were analyzed for ' Total petroleum hydrocarbons quantified as gasoline (TPH-g) and diesel (TPH-d) in accordance with EPA Method 8015-modified, ' Benzene, toluene, ethylbenzene and total xylenes(BTEX)in accordance with EPA Method 8021, and • Fuel additives including methyl tertiary-butyl ether(MTBE),di-isopropyl ether (DIPE), ethyl tertiary-butyl ether (ETBE), tertiary-amyl methyl ether (TAME), tertiary butanol (TBA), ethylene dibromide (EDB) and 1,2-dichloro ethane (1,2-DCA) in accordance with EPA Method 8260B ' 30 FINDINGS Ground water elevation, flow direction, and gradient were determined from field data collected on 14 May 2004 The MTBE-impact to ground water was quantified from the laboratory analysis of the ground water samples 3 1 GROUND WATER GRADIENT AND FLOW DIRECTION At the time of the May 2004 sampling event,depths to ground water ranged from 20 33 feet to 21 98 feet below the tops of the well casings Ground water elevations at the site ranged from 11 92 feet above mean sea level (MSL) in wells MW5 and MW9 to 12 54 feet above MSL in well MW2 (Table 1) Ground water elevations at the site averaged approximately 12 16 feet above mean sea level (MSL) showing an elevation decrease of approximately 2 17 feet since the last monitoring event Ground water flow was inferred to be flowing toward the northwest,away from the former UST area at an average gradient of 0 005 ft/ft Figure 3 illustrates the contoured ground water elevations as measured on 14 May 2004 3 2 ANALYTICAL RESULTS OF GROUND WATER SAMPLES I TPH-g, TPH-d, BTEX and the fuel oxygenates, with the exception of MTBE, were not detected in any of the ground water samples collected Advanced GeoEnvironmental,Inc I