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' 28 March 2005 <br /> AGE-NC Project No 99-0637 <br />' Page 2 of 4 <br /> of Health Services (DHS)-certified analytical laboratory, for analysis The samples were analyzed <br />' for <br /> • Total petroleum hydrocarbons quantified as gasoline (TPH-g) and diesel (TPH-d) in <br /> raccordance with EPA Method 8015 Modified, <br /> • Benzene, toluene,ethylbenzene and total xylenes(BTEX) In accordance with EPA Method <br />' 8021, and <br /> • Fuel additives including methyl tertiary-butyl ether(MTBE),di-isopropyl ether (DIPE), ethyl <br />' tertiary-butyl ether (ETRE), tertiary-amyl methyl ether (TAME), tertiary butanol (TBA), <br /> ethylene dibromlde (EDB) and 1,2-dichloroethane (1,2-DCA) in accordance with EPA <br /> Method 8260B <br /> 1 <br />' 3.0. FINDINGS <br /> Ground water elevation, flow direction, and gradient were determined from field data collected on <br /> 29 November 2004 The MTBE-impact to ground water was quantified from the laboratory analysis <br /> of the ground water samples <br /> 3 1 GROUND WATER GRADIENT AND FLOW DIRECTION <br /> At the time of the November 2004 sampling event, depths to ground water ranged from 18 81 feet <br /> to 21 11 feet below the tops of the well casings Ground water elevations at the site ranged from <br /> 12 97 feet above mean sea level (MSL) to well MW-9 to 13 64 feet above MSL in well MW-3 <br />' (Table 1) Ground water elevations at the site averaged approximately 13 46 feet above mean sea <br /> level (MSL) showing an elevation increase of approximately 3 57 feet since the last monitoring <br />' event <br /> Ground water flow was inferred to be flowing toward the northwest,away from the former UST area <br /> at an average gradient of 0 003 Rift, and toward the north-northeast at an average gradient of 0 002 <br /> ft/ft Figure 3 illustrates the contoured ground water elevations as measured on 29 November 2004 <br />' 3 2 ANALYTICAL RESULTS OF GROUND WATER SAMPLES <br /> TPH-g,TPH-d,BTEX and the fuel additives,with the exception of MTBE,were not detected in any <br /> of the ground water samples collected <br /> • <br />' Advanced GeoEnvironmental,Inc <br />