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i, <br />' 03 January 2002 <br />' AGE-NC Project No 95-0167 <br /> Page 2 of 4 <br />' are included in Appendix B Purged water was stored on-site in labeled, 55-gallon DOT-approved <br /> drums <br />' 2 3 COLLECTION AND ANALYSIS OF GROUND WATER SAMPLES <br />' Water samples were collected from each purged well using new disposable plastic bailers Each <br /> water sample was transferred into 40-m1 VOA vials containing 0 5 ml 18% hydrochloric acid as a <br />' sample preservative After collection, the samples were properly labeled, placed m a chilled <br /> container and transported under cham-of-custody to Cal Tech Environmental Laboratories(CTEL), <br /> and were analyzed for <br /> Total petroleum hydrocarbons quantified as gasoline (TPH-g) in accordance with EPA <br /> Method 8015 Modified, <br />' Benzene, toluene, ethylbenzene and total xylenes (BTEX) and the oxygenated ether methyl <br /> tertiary-butyl ether(MTBE) in accordance with EPA Method 8020/602, and <br />' • Fuel additives-di-isopropyl ether(DIPE),ethyl tertiary-butyl ether(ETBE),methyl tertiary- <br /> butyl ether(MTBE), tertiary-amyl methyl ether(TAME), tertiary butanol(TBA), methanol, <br /> ethanol, ethyl dibromide(EDB) and 1,2-Dichloroethane(1,2-DCA) in accordance with EPA <br />' Method 8260 Modified, respectively <br /> 3.0. FINDINGS <br /> g, Ground water flow direction, elevation, and gradient were determined from data collected in the <br /> R field, The hydrocarbon impact to ground water was quantified by the laboratory data obtained from <br /> the groundwater samples <br /> 3 1 GROUND WATER ELEVATION AND GRADIENT <br /> For the December 2001 sampling event,depths to ground water ranged from 14 61 feet to 15 50 feet <br /> below the tops of the well casings Ground water elevations at the site ranged from 5 00 feet to 6 41 <br />' feet below mean sea level(MSL) Ground water was within-the screened interval of MW-1 through <br /> MW-6 <br /> i' The ground water flow direction was determined by plotting and contouring the ground water <br /> elevation data The ground water at the site was determined to be flowing to the north-northwest <br /> Advanced GeoEnvironmenfai,Inc <br /> r <br /> 6 <br />