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I <br /> • 03 May 2001 <br />' AGE-NC Project No 97-0326 <br /> Page 2 of 4 <br /> i <br />' a chilled container under chain of custody to McCampbelI Analytical, Inc (MAI), a California <br /> Department of Health Services(DHS)-certified analytical laboratory for analysis The samples were <br /> analyzed for <br />' • Total petroleum hydrocarbons quantified as gasoline (TPH-g) in accordance with EPA <br /> I Method 5030/8015 Modified <br /> • Volatile aromatic hydrocarbons-benzene, toluene, ethylbenzene and total xylenes(BTEX) <br /> and methyl tertiary-butyl ether (MTBE) in accordance with EPA Method 8020 <br /> • Oxygenated compounds - di-isopropyl ether (RIPE), ethyl tertiary-butyl ether (ETBE), <br /> MTBE, tertiary-amyl methyl ether(TAME), tertiary butanol (TBA), methanol and ethanol <br />' in accordance with EPA Method 8260 Modified <br /> • Ethylene dibromide (EDB) and 1,2 dichloroethane (1,2 DCA) in accordance with EPA <br /> Method 8260 <br /> • 3.0. FINDINGS <br /> Ground water elevation, and flow direction were determined from field data, hydrocarbon-impact <br /> Ito ground water was assessed by laboratory analysis of ground water samples <br /> 3 1 GROUND WATER GRADIENT AND FLOW DIRECTION <br /> Ground water was measured at a depth of approximately 31 feet below the well heads during the <br /> March 2000 monitoring event,within the screened intervals of MW2 and MW3,but approximately <br /> 4 feet above the screened interval in MWl The elevation of ground water in each well was <br /> I calculated by subtracting the depth to ground water from the well head elevations Ground water <br /> elevations ranged from 16 70 to 16 75 feet below mean sea level (MSL) Ground water data is <br /> summarized on Table 1 <br /> Ground water elevation contours based on the data for the March 2001 monitoring event are <br /> illustrated on Figure 2 The ground water flow direction was south-southeast with a gradient of <br /> 0 0025 ft/ft <br /> • <br /> Adwnced GeoEaviranmental,Inc <br />