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lie 14 March 2005 <br /> AGE-NC Project No 03-1070 <br />' Page 2 of 4 <br />' Environmental Laboratories (CTEL) of Paramount, a California Department of Health Services- <br /> certified analytical laboratory, for analysis The samples were analyzed for <br />' • Total petroleum hydrocarbons quantified as gasoline (TPH-g) in accordance with EPA i <br /> Method 8015 Modified, <br /> • Benzene,toluene,ethylbenzene and total xylenes(BTEX) In accordance with EPA Method <br /> 8260B, and <br /> • Fuel additives including methyl tertiary-butyl ether(MTBE),di-isopropyl ether(DIPS),ethyl <br />' tertiary-butyl ether (ETBE), tertiary-amyl methyl ether (TAME), tertiary butanol (TBA), <br /> ethylene dibromide (EDB) and 1,2-dichloroethane (1,2-DCA) in accordance with EPA <br /> Method 8260B <br />' 3.0. FINDINGS <br /> Ground water elevation, flow direction, and gradient were determined from field data collected on <br />' 17 November 2004 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 November 2004 sampling event, depths to ground water ranged from 3176 <br /> (MW-2)feet to 32 20(MW-1)feet below the tops of the well casings(Table 1),which is a decrease <br /> of 0 80 feet since the last monitoring event The ground water elevations calculated from the depth <br />' to water measurements averaged approximately 20 94 feet below mean sea level (MSL) The net <br /> ground water flow was inferred to be towards the south at a calculated hydraulic gradient of <br /> 0 002 foot per foot(ft/ft) Figure 3 illustrates the contoured ground water elevations as measured on <br />' 17 November 2004 <br /> During this monitoring event, the ground water level in wells MW-2 and MW-4 were at least <br /> 2 09 feet below the top of the well screens, indicating that the wells are properly screened and <br /> representative of shallow ground water conditions Wells MW-1 and MW-3 were at least 2 8 feet <br /> above the tops of the well screen, however, the ground water samples, although collected from <br /> "flooded" wells, are representative of shallow ground water conditions because the aquifer is <br /> confined by overlying fine-grained materials and the wells are screened In the first encountered <br /> ground water unit <br /> Advanced GeoEnvironmental,Inc <br />