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I15 November 2005 <br /> • AGE-NC Project No 04-1045 <br />' Page 2 of 4 <br />' were labeled with the monitoring well designation,date,time of sampling,and the sampler's initials <br /> and transported in a chilled container under chain of custody to Cal Tech Environmental <br /> Laboratories (CTEL), a Department of Health Services-certified analytical laboratory, for analysis <br /> The samples 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) in accordance with EPA Method <br />' 8260, and <br /> • The fuel additives di-isopropyl ether (DIPS), 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 /> IGround water elevation, flow direction, and gradient were determined from field data collected on <br /> 04 August 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 August 2005 sampling event, depths to ground water ranged from 19 10 feet <br /> (MW-3)to 19 74(MW-2)feet below the tops of the well casings(Table 3),water levels were at least <br /> 4 1 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 9 68 feet below mean sea level (MSL) <br /> I Ground water flow was inferred to be southwest at a hydraulic gradient of approximately 0 001 foot <br /> per foot(ft/ft) Figure 3 illustrates the contoured ground water elevations as measured on 04 August <br /> 2005 <br /> 32 ANALYTICAL RESULTS OF GROUND WATER SAMPLES <br /> TPH-g was detected in the ground water sample collected from well MW-1 at concentrations of <br /> • 210,000 micrograms per liter (µg11} <br /> IAdvanced GeoEnvironmental,Inc <br />