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i <br /> 26 December 2000 <br />• AGE-NC Project No 97-0300 <br /> Page 2 of 4 <br /> water was contamenzed in 55-gallon drums and was stored on-site in an area lacking general public <br /> access <br /> 3 2 GROUND WATER SAMPLING <br /> Following well purging, ground water levels from each well achieved a minimum of 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 four 40-m1 <br /> EPA-approved VOA vials containing 0 5 ml 18% hydrochloric acid as a preservative After wells <br /> MW-2 and MW-3 were bailed "dry", no measurable recharge was observed, therefore, a bailer was <br /> suspended at the bottom of wells MW-2 and MW-3 and a sample collected from the suspended <br /> bailer the following day Care was taken to ensure that visible air bubbles were not present in the <br /> vials after filling and capping Ground water sample containers were labeled with the well <br /> designation, date, time, and sampler's initials <br /> 33 LABORATORY ANALYSIS OF GROUND WATER SAMPLES <br /> Each ground water sample was logged on a chain-of-custody form laced In a chilled container and <br /> �' p g8 Y � p <br /> transported to a DHS-certified laboratory for analysis for <br /> • 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 /> • Volatile aromatic compounds - benzene, toluene, ethylbenzene and xylenes (BTEX) and <br /> methyl tertiary butyl ether(MTBE) by EPA Method 8020, <br /> I • 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 /> EPA Method 8260 Modified <br /> • Ethylene dibromide (EDB) and 1,2-dichloroethane (1,2-DCA) by EPA Method 8260 <br /> Modified <br /> 34 FINDINGS <br /> Ground water elevation, flow direction and gradient were determined from field data collected on <br /> 28 September 2000, laboratory analysis of three ground water samples detected TPH-d in one <br /> Advanced GeoEnvironmcntal,Inc <br />