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i <br /> 30 October 2000 <br />' AGE-NC Protect No 99-0657 <br /> Page 2 of 4 <br /> labeled, placed In a chilled container and transported under chain-of-custody to Alpha Analytical <br /> Laboratories, Inc (AAL) for analysis The samples were analyzed for the following <br />' Total petroleum hydrocarbons quantified as gasoline (TPH-g) and diesel (TPH-d) in <br /> accordance with EPA Methods 5030/8015-modified for fuels, <br /> • Volatile aromatic compounds benzene, toluene, ethylbenzene and xylenes (BTEX) and <br /> methyl tertiary-butyl ether(MTBE) in accordance with EPA Method 8020, <br />' Volatile organic compounds and fuel oxygenates MTBE, di-Isopropyl ether (RIPE), ethyl <br /> tertiary-butyl ether (ETBE), tertiary-amyl methyl ether (TAME), tertiary butanol (TBA), <br /> 1,2-dichloroethane (1,2-DCA) and ethylene dibromide (EDB) in accordance with EPA <br /> Method 8260 <br /> I3.0. FINDINGS <br />�. Ground water elevation, flow direction, and gradient were determined from field data collected on <br /> 03 October 2000, the contaminant Impact to ground water was assessed from the laboratory <br /> analytical data <br /> I <br /> 3 1 GROUND WATER GRADIENT AND FLOW DIRECTION <br /> IAt the time of the October 2000 sampling event, depths to ground water ranged from 30 07 feet to <br /> 31 13 feet below the tops of the well casings Relative ground water elevations at the site ranged <br /> from 1100 feet above mean sea level (MSL) in well MW4 to 1131 feet above MSL in well MW2 <br /> (Table 1) During this monitoring event, the depths to ground water m the wells were approximately <br /> 0 07 to 6 09 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 Increased an average of 156 feet between the July 2000 and October 2000 monitoring events <br /> IGround water is flowing toward the southwest under an average gradient of 0 005 feet/feet Figure <br /> 3 illustrates the contoured ground water elevations as measured on 03 October 2000 <br /> I3 2 ANALYTICAL RESULTS OF GROLND WATER SAMPLES <br /> Ile TPH-g was detected in the all four ground water samples at concentrations ranging from 110,ug/1 <br /> in MW3 to 3,700,ug/1 In MW4 TPH-d was only detected in samples MW i and MW-4 at 3 80,ug/l <br /> Iand 220 Ag/l, respectively <br /> Advanced GecEnvironmental,Inc <br /> I <br />