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r19 March 2001 <br /> AGE-NC Project No 97-0300 <br /> rPage 2 of 4 <br /> r ground water was containerized in 55-gallon drums and was stored on-site in an area lacking general <br /> public access <br /> r2 2 GROUND WATER SAMPLING <br /> r Following well purging, ground water levels from each well achieved approximately 80 percent <br /> recharge prior to sample collection Ground water samples were collected from the purged wells <br /> utilizing new,disposable polyethylene bailers, a one-liter bottle without preservative and three 40-m1 <br /> r EPA-approved VOA vials containing 0 5 ml 18% hydrochloric acid as a preservative Care was <br /> taken to ensure that visible air bubbles were not present in the vials after filling and capping Ground <br /> water sample containers were labeled with the well designation, date, time, and sampler's initials <br /> r <br /> 2 3 LABORATORY ANALYSIS OF GROUND WATER SAMPLES <br /> rEach ground water sample was logged on a chain-of-custody form, placed in a chilled container and <br /> transported to a DHS-certified laboratory for analysis for <br /> r • Total petroleum hydrocarbons quantified as gasoline and diesel (TPH-g and TPH-d, <br /> respectively) by EPA Methods 5030/8015 Modified and 3550/8015 Modified, respectively, <br /> r • Volatile aromatic compounds - benzene, toluene, ethylbenzene and xylenes (BTEX) and <br /> methyl tertiary butyl ether(MTBE) by EPA Method 8020, <br /> r • Fuel oxygenated compounds - methanol, ethanol, tert-butanol (TBA), di-isopropyl ether <br /> (DIPE),ethyl tertiary butyl ether(ETBE), tertiary amyl methyl ether(TAME) and MTBE by <br /> r EPA Method 8260 Modified <br /> • Ethylene dibromide (EDB) and 1,2-dichloroethane (1,2-DCA) by EPA Method 8260 <br /> Modified <br /> r <br /> r3.0. FINDINGS <br /> Ground water elevation, flow direction and gradient were determined from field data collected on <br /> r 28 December 2000, the contaminant impact to ground water was assessed from the ground water <br /> laboratory data <br /> r <br /> • Advanced GeoEnvironmental,Inc <br /> I <br /> r <br />