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13 June 2003 <br /> • AGE-NC Project No 97-0249 <br /> IPage 4 of 8 <br /> The 24 March 2003 ground water elevation at wells MW-1 through MW-12 were calculated by <br /> subtracting the measured depth to ground water from the surveyed casing elevation The ground <br /> water elevation data collected from the site was plotted for the informal hydrogeologic flow units <br /> as defined in AGE's CPT Site Investigation - First Quarter 2001 (dated 23 March 2001), and are <br /> Idepicted in Figures 3 through 7 <br /> I Ground water elevations were plotted on scaled site plans for the informal Hydrologic Unit 1 <br /> (between 15 and 35 feet), Hydrologic Unit 2 (between 35 and 60 feet), Hydrologic 3 (between 60 <br /> and 90 feet),Hydrologic Unit 4(between 90 and 110 feet) and Hydrologic Unit 6 (between 135 and <br /> 150 feet) as defined in AGE's Cone Penetrometer Testing(CPT) Site Investigation First Quarter <br /> 2001 (Figures 3 through 7, respectively) <br /> 3 1 1 Hydrologic Unit_1_ <br /> Ground water elevation data collected in Hydrologic Unit 1 (15 to 35 feet bsg)was inferred to have <br /> a eastern flow direct near the central portion of the site at a gradient of 0 001 ft/ft and radially inward <br /> water flow direction towards a ground water depression in the area of Flag City Chevron wells <br /> MW-1, MW-2, MW-5 and MW-7 (Figure 3) at a gradient of 0 009 ft/ft (Figure 3) <br /> 3 12 Hydrologic Unit 2 <br /> Ground water elevation data collected in Hydrologic Unit 2 (35 to 60 feet bsg)was inferred to have <br />' an east to southeast ground water flow direction at the Three B's Truck Plaza site and inferred to <br /> have a southeast ground water flow direction at the Rocky's Restaurant and Flag City Chevron sites <br />' A ground water gradient was estimated at approximately 0 001 ft/ft or less at the Three B's Truck <br /> Plaza site (Figure 4) <br /> 3 1 3 Hydrologic Unit 3 <br /> I Ground water elevation data collected in Hydrologic Unit 3 (85 to 105 feet bsg)was inferred to have <br /> an eastward ground water flow direction at the Three B's Truck Plaza A ground water gradient was <br /> estimated at approximately 0 001 ft/ft or less at the Three B's Truck Plaza site (Figure 5) <br /> Iadvanced GeoEnvironmental,Inc <br /> I <br />