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15 .lune 2005 <br /> 1 � <br /> AGE-NC Protect No 04-1045 <br /> Page 2 of 4 P��5 <br /> ad <br /> I samples from each well were transf ed into three 40-milliliter(ml)volatile organic analysis(VOA) <br /> vials c in o on-as-a-sample-preservativCand one 1-liter <br /> amber bottle without preservative The samples were labeled with the monitoring well designation, <br />' date, time of sampling, and the sampler's initials and transported in a chilled container under chain <br /> of custody to Cal Tech Environmental Laboratories (CTEL), a Department of Health Services- <br /> certified analytical laboratory, for analysis The samples were analyzed for <br />' • Total petroleum hydrocarbons quantified as gasoline and diesel (TPH-g and TPH-d) in <br /> accordance with EPA Method 8015 Modified, <br />' • Benzene,toluene, ethylbenzene and total xylenes(BTEX)in accordance with EPA Method <br /> 8260, and <br /> • The fuel additives di-isopropyl ether (DIPE), ethyl tertiary-butyl ether (ETBE), methyl <br /> tertiary-butyl ether (MTBE), tertiary-amyl methyl ether (TAME), tertiary butanol (TBA), <br /> 1,2-Dichloroethane (1,2-DCA) and 1,2-Dibromoethane (EDB) by EPA Method 8260 <br />' Modified <br /> • 3.0. FINDINGS <br />' Ground water elevation, flow direction, and gradient were determined from field data collected on <br /> 24 February 2005 The contaminant impact to ground water was quantified from the laboratory <br /> analytical data <br /> 3 1 GROUND WATER GRADIENT AND FLOW DIRECTION <br /> At the time of the February 2005 sampling event, depths to ground w ter ranged from 20 66 feet <br /> (MW-3)to 2124(MW-2)feet below the tops of the well casings(Tablebl,water levels were at least <br /> 5 66 feet below the top of the well screens, indicating that the wells are properly screened and <br /> representative of shallow ground water conditions The average calculated ground water elevation <br />' was approximately 1124 feet below mean sea level (MSL) <br /> Ground water flow was inferred to be southeast at a hydraulic gradient of approximately 0 002 foot <br />' per foot(ft/ft) Figure 3 illustrates the contoured ground water elevations as measured on 24 February <br /> 2005 <br /> 1 <br />' Advanced GeoEnrnronmental,Inc <br /> 1 <br />