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d w i 22 August 2005 AGE-NC Project No 99-0559 Page 4 of 7 da=Density of free product (diesel at—0 75 g/ml) dy= Density of water(-10 gm/ml) The ground water elevation was calculated between 26 34 feet(MW-7A)and 29 69 feet(MW-5A) below mean sea level (MSL), the ground water elevation increased an average of 0 3 feet since the March 2005 monitoring event except In well MW-7A,which decreased The top of the ground water table remained within the screened Interval of these wells At the time of the June 2005 monitoring event, ground water flow within the interval of HU 1 and HU2 wells was Inferred to be toward the southwest at the former UST area(Figure 3) at a gradient of 0 002 ft/ft HU3 and HU4 In the wells representing HU3 and HU4, the depth to ground water ranged from 54 03 to 55 08 feet btoc The ground water elevation was calculated at between 29 09 feet(MW-7B) and 29 76 feet(MW-513)below MSL,the ground water elevation from wells in this hydrogeologlc Interval Increased 0 23 feet since the last quarterly monitoring event Ground water was Inferred to be flowing southwest at a gradient of 0 002 ft/ft (Figure 4) HU5 Within the upper portion of HU5 (Upper HU5), screened between 125 and 135 feet bsg, ground water elevation ranged between 29 91 feet(MW-6C)and 30 06 feet(MW-5C)below MSL, . the ground water elevation Increased 0 16 feet since the last monitoring event Ground water at the former UST release was Inferred to be flowing toward the northwest at a gradient of 0 002 ft/ft (Figure 5) Within the lower portion of HU5 (Lower HU5), screened between 148 and 160 feet bsg, ground water elevation ranged between 30 30 feet (MW-7D) and 30 54 feet (MW-5D) below MSL, the ground water elevation Increased 0 23 feet since the last monitoring event Ground water was determined to be flowing toward the southeast at a hydraulic gradient of 0 002 ft/ft (Figure 6) HU6 In the wells representing HU6,the depth to ground water ranged between 56 11 and 57 22 feet btoc The ground water elevation was calculated between 31 51 feet (MW-5E) and 32 28 feet (MW-7E)below MSL, the ground water elevation from wells In this hydrogeologlc unit Increased 0 41 feet since the last quarterly monitoring event Ground water was Inferred to be flowing toward the northeast at a hydraulic gradient of 0 005 ft/ft (Figure 7) 32 ANALYTICAL RESULTS OF GROUND WATER SAMPLE ANALYSIS Ground water samples were analyzed by CTEL for the chemical constituents referenced In Section 2 2 The following Is a summary of the analytical results HU1 and HU2 TPH-g was detected In wells MW-1 through MW-4 and wells MW-5A through Advanced GeoEnvironmenfal,Inc