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. 29 May 2001 <br /> I AGE-NC Protect No 99-0657 <br /> Page 2 of 4 <br /> collection, the samples were properly labeled, placed in a chilled container and transported under <br /> chain-of-custody to McCampbell Analytical Inc (MAI) for analysis The samples were analyzed for <br /> • Total petroleum hydrocarbons quantified as gasoline (TPH-g) and diesel (TPH-d) in <br /> accordance with EPA Methods 5030/3550/8015-modified for fuels, <br /> • Volatile aromatic compounds - benzene, toluene, ethylbenzene and xylenes (BTEX) in <br /> accordance with EPA Method 8020, <br /> • Volatile organic compounds and fuel oxygenates - methyl tertiary-butyl ether (MTBE), di- <br /> isopropyl ether (DIPE), ethyl tertiary-butyl ether (ETBE), tertiary-amyl methyl ether <br /> (TAME), tertiary butanol (TBA), 1,2-d;chloroethane (1,2-DCA) and ethylene dibromide <br /> I (EDB) in accordance with EPA Method 8260 <br /> 30. FINDINGS <br />� . Ground water elevation, flow direction, and gradient were determined from field data collected on <br /> 03 April 2001, the contaminant impact to ground water was assessed from the laboratory analytical <br /> data <br /> I <br /> 3 1 GROUND WATER GRADIENT AND FLOW DIRECTION <br /> At the time of the April 2001 sampling event, depths to ground water ranged from 31 98 feet to <br /> 33 08 feet below the tops of the well casings Relative ground water elevations at the site ranged <br /> from 9 10 feet above mean sea level (MSL) in well MW4 to 9 36 feet above MSL in well MW2 <br /> I (Table 1) During this monitoring event, the ground water levels in the wells were approximately <br /> 1 98 to 7 99 feet below the tops of the well screens, indicating that the wells are screened properly <br /> and yield representative shallow ground water samples The relative ground water elevation at the <br /> site decreased an average of 106 feet between the January 2001 and April 2001 monitoring events <br /> Ground water was inferred to be flowing toward the southwest under an average gradient of 0 004 <br /> feet/feet Figure 3 illustrates the contoured ground water elevations as measured on 03 April 2001 <br /> 3 2 ANALYTICAL RESULTS OF GROUND WATER SAMPLES <br /> ITPH-g was detected in the all four ground water samples at concentrations ranging from 1,300 ug/l <br /> . in MW2 to 24,000 pg/l in MW1 TPH-d was also detected in the all four ground water samples at <br /> concentrations ranging from 170,ug/l in MW2 to 1,200,ug/l in MW 1 <br /> Advanced Geo Environmental,Inc <br />