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.y ' 19 June 2003 AGE-NC Project No 99-0637 ' Page 2 of 4 • 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 (BTE&X) and 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-dichloroethane (1,2-DCA) in accordance with EPA ' Method 8260B 3.0. FINDINGS Ground water elevation, flow direction, and gradient were determined from field data collected onl9 May 2003 The hydrocarbons-impact to ground water was quantified from the laboratory analysis of the ground water samples lie 3 1 GROUND WATER GRADIENT AND FLOW DIRECTION At the time of the May 2003 sampling event,depths to ground water ranged from 16 71 feet to 18 74 feet below the tops of the well casings Ground water elevations at the site ranged from 15 58 feet above mean sea level(MSL)in well MW6 to 15 88 feet above MSL in well MW7(Table 1) During this monitoring event, the ground water levels in the wells were at least six to seven feet below the tops of the well screens, indicating that the wells are screened properly to yield representative shallow ground water samples The ground water elevation at the site decreased approximately 0 76 feet between the February 2003 and May 2003 monitoring events Ground water flow was inferred to be flowing toward the north and southwest,away from the former UST area at an average gradient of 0 0035 feet/feet Figure 3 illustrates the contoured ground water Ielevations as measured on 19 May 2003 3 2 ANALYTICAL RESULTS OF GROUND WATER SAMPLES TPH-g,BTE&X and the fuel oxygenates, excluding MTBE, were not detected in any of the ground water samples Advanced GeoEnvironmental,Inc I