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5 <br /> rx <br /> 15 July 2005 <br /> . AGE-NC Project No 00-0769 <br /> Page 3 of 7 <br /> r r _ , <br /> 3.0. FINDINGS <br /> " Ground water elevation,flow direction,and gradient were Inferred from field data The hydrocarbon <br /> Impact to ground water was quantified by laboratory analysis of ground water samples <br /> 3 1 GROUND WATER ELEVATION AND GRADIENT <br /> Depth to ground water was between 25 84 feet (MW-8A) and 30 14 feet (MW-5E) below the tops <br />' of the well casings on 07 March 2005 Ground water elevations ranged from 14 23 feet (MW-8A) <br /> to 17 17 feet (MW-5E) below mean sea level (MSL) Ground water elevation data is presented in <br /> Table 1, contoured ground water elevation data is presented in Figures 3 through 6 The elevation <br />' and gradient for each hydrogeologic unit is described below <br /> HU-1 <br /> Based on ground water elevation data collected in HU-1 Upper Zone (25 feet to 51 feet bsg), the <br />' potentiometric surface consists of a east-west trending ridge or high Groundwater is Inferred to flow <br /> away from the ridge towards the east, north and south at a hydraulic gradient of 0 004 foot per <br /> foot(ft/ft)(Figure 3) <br />' HU-2 <br />' Based on ground water elevation data collected in HU-2 (112 feet to 125 feet bsg), the inferred <br /> groundwater flow is towards the south to southeast at a gradient of 0 003 ft/ft (Figure 4) <br />' HU-3 <br /> Based on ground water elevation data collected in HU-3(140 feet to 160 feet bsg),the ground water <br /> flow direction is generally towards the northwest at a gradient of approximately 0 005 ft/ft <br /> (Figure J5) <br /> y r 5 <br />' HU-4 <br /> Based on ground water elevation data collected in HU-4 (160 feet to 175 feet bsg), the HU-4 7 <br />' potentiometric surface consists of a northwest-plunging ridge, ground water was inferred to be <br /> flowing outward from a ridge at hydraulic gradients between 0 007 ft/ft and 0 008 ft/ft (Figure 6) <br />' Advanced GeoEnvironmental,Inc <br />