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I10 December 2002 <br /> . AGE-NC Project No 97-0326 <br /> Page 2 of 4 <br /> I (CTEL), a California Department of Health Services (DHS)-certified analytical laboratory for <br /> analysis 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 /> 8260B <br /> The oxygenated compounds di-isopropyl ether (DIPE), ethyl tertiary-butyl ether (ETBE), <br /> I methyl tertiary-butyl ether (MTBE), tertiary-amyl methyl ether (TAME), tertiary butanol <br /> (TBA), methanol and ethanol in accordance with EPA Method 8260B <br />' • Ethylene dibromide (EDB) and 1,2 dichloroethane (1,2 DCA) in accordance with EPA <br /> Method 8260B <br />' 3.0. FINDINGS <br /> I • Ground water elevation, and flow direction were determined from field data, hydrocarbon-impact <br /> to ground water was quantified by laboratory analysis of ground water samples <br /> 3 1 GROUND WATER GRADIENT AND FLOW DIRECTION <br />' Ground water was measured at an average depth of approximately 34 94 feet below the well heads <br /> during the October 2002 monitoring event The water level is within the screened intervals of MW2 <br />' and MW3, but approximately 0 34 feet above the screened interval in MW1 <br /> The elevation of ground water in each well was calculated by subtracting the depth to ground water <br />' from the well head elevations Ground water elevations ranged from 20 04 (MW2) to 20 19 feet <br /> (MW3) below mean sea level (MSL) Ground water data is summarized on Table 1 <br /> I Ground water elevation contours based on the data for the October 2002 monitoring event are <br /> illustrated on Figure 2 The ground water flow direction was south-southeast with a gradient of <br /> 0 007 ft/ft <br /> I <br /> I <br /> • <br />' Advanced GeoEnv"ronmental,Inc <br /> I <br />