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i <br /> ' 03 January 2002 <br /> . AGE-NC Project No 97-0301 <br /> Page 2 of 5 <br /> contamerized in 55-gallon drums and was stored on-site in an area lacking general public access <br /> 2 2 GROUND WATER SAMPLING <br /> Following well purging,ground water levels in all purged wells 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, one-liter amber bottles without sample preservative <br /> and 40-m1 EPA-approved VOA vials containing 0 5 ml 18% hydrochloric acid as a sample <br /> preservative Care was taken to ensure that visible air bubbles were not present in the vials after <br /> ' filling and capping Ground water sample containers were labeled with the well designation, date, <br /> time, and sampler's initials <br /> ' <br /> 2 3 LABORATORY ANALYSISF ROUND WATER SAMPLES <br /> O G <br /> ' Each ground water sample was logged on a cham-of-custody form,placed in a chilled container and <br /> transported to a DHS-certified laboratory for analysis for <br /> - Total petroleum hydrocarbons quantified as gasoline, diesel and kerosene (TPH-g, TPH-d <br /> and TPH-k, respectively)by EPA Methods 8015M/5030, <br /> ' - Benzene,toluene,ethyl benzene and xylene(BTEX)with methyl-tertiary butyl ether(MTBE) <br /> by EPA Method 8020, and <br /> - 1,2-Dichloroethane(1,2-DCA), ethylene dibromide(EBD),di-isopropyl ether(DIPE), ethyl <br /> tert butyl ether (ETBE), MTBE, tert amyl methyl ether (TAME), tertiary butanol (TBA), <br /> methanol and ethanol by EPA Method 8260M <br /> 1 <br /> ' 3.0. FINDINGS <br /> Ground water elevation, flow direction and gradient were determined from field data collected on <br /> ' 26 September 2001, the contaminant impact to ground water was quantified by the ground water <br /> laboratory data <br /> 1 3 1 GROUND WATER ELEVATION AND GRADIENT <br /> The depths to ground water in wells MW-1 through MW-7 were measured between 3181 and 32 38 <br /> feet below the tops of well casings,ground water elevations were calculated to be between 19 36 feet <br /> and 19 67 feet below mean sea level Ground water elevation at the site decreased an average 2 78 <br /> Advanced GeoEnvironmental,Inc <br /> I <br />