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30 April 2005 <br /> . AGE-NC Project No 96-0232 <br /> Page 4 of 9 <br /> The 28 March 2005 ground water elevation data collected from the Flag City Chevron site and the <br /> adjacent Three B's Truck Plaza site were plotted for the informal First Zone, Second Zone, <br /> Secondary Aquifer Zone and Primary Aquifer Zone hydrogeologic units as defined in AGE's Final <br /> Remediation Plan, and are depicted in Figures 4, 5, 6 and 7, respectively <br /> 2 4 1 1 First Zone Aquifer <br /> Ground water elevation data collected in the First Zone Aquifer(15 to 35 feet bsg) at the Flag City <br /> Chevron inferred a net ground water flow towards the southeast at a hydraulic gradient of 0 001 ft/ft <br /> or less The ground water gradient at the Three B's Truck Plaza inferred a net ground water flow <br /> direction towards the northeast at a hydraulic gradient of 0 001 ft/ft or less (Figure 4) <br /> 2 4 12 Second Zone Aquifer <br /> Ground water elevation data collected in the Second Zone Aquifer(40 to 60 feet bsg)inferred a net <br /> ground water flow direction at the Flag City Chevron towards the southeast at a hydraulic gradient <br /> of 0 001 ft/ft or less The ground water gradient at the Three B's Truck Plaza inferred a net ground <br /> water flow direction towards the east at a hydraulic gradient of 0 001 ft/ft or less (Figure 5) <br /> 2 4 13 Secondpa Aquifer Zone <br /> Ground water elevation data collected in the Secondary Aquifer Zone(85 to 105 feet bsg) inferred <br /> a net ground water flow direction at the Flag City Chevron towards the east-southeast at a hydraulic <br /> gradient of 0 001 ft/ft or less The ground water gradient at the Three B's Truck Plaza inferred a net <br /> ground water flow direction towards the east-northeast at a hydraulic gradient of 0 001 ft/ft or less <br /> (Figure 6) <br /> 2 4 1 4 Primary Aquifer Zone <br /> Ground water elevation data collected in the Second Zone Aquifer(130 to 150 feet bsg) inferred a <br /> net ground water flow direction at the Flag City Chevron towards the southeast at a hydraulic <br /> gradient of 0 001 ft/ft or less The ground water gradient at the Three B's Truck Plaza inferred a net <br /> ground water flow direction towards the east-northeast at a hydraulic gradient of 0 001 ft/ft or less <br /> (Figure 7) <br /> • <br /> Advanced GeoEnvironmental,Inc <br />