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I l 1 Ih 1'5'October 2000 ` AGE-NC Project No 96-0232 1; I Pager 11 of 15 Ground water elevation data collected in the First Zone Aquifer'(5 to 35 feet bsg)from Flag City - Chevron monitoring wells MW-1,MW-2,MW-4,MW-5,MW-6A,MW-7,MW-10A and MW-12A indicated that the ground water flow direction was generally west-northwest at an average gradient - ' of 0 003 ft/ft, or approximately 16 feet per mile (Figure 5), the ground water elevation data in the "T area of Flag City Chevron well MW-13A'and Three B's Truck Plaza wells MW-1 through MW-6 indicated that the ground water flow direction was generally toward the west-southwest at a gradient ' of 0 004 ft/ft (21 feet per mile) '3f ' ` Ground water elevation data collected in the Second Zone Aquifer(40 to 60 feet bsg) from Flag City ' Chevron monitoring wells MW-6B,MW-8A,MW-9A and MW-1 OB indicated that the ground water M" flow direction was generally west to west-southwest at an average gradient of 0 006 ft/ft, or approximately 32 :feet per mile (Figure 6), the ground water elevation data in the area of Fla&City Chevron wells MW-11A,MW 12B and MW-13B indicated that the ground water flow direction was generally toward the west-northwest at a gradient`of 0 008 ft/ft (42 feet per mile) 1 Ground water elevation data collected in the Secondary Aquifer Zone(85 to 105 feet bsg) from Flag City Chevron monitoring wells MW-8B,MW-9B and MW-1 OD indicated that the ground water flow v direction was generally west-southwest at an average gradient of 0 003 Rift (Figure 7), the ground water elevation data in the area of Flag City Chevron wells MW-11C, MW-12C and MW-13C indicated that the ground water flow direction was generally toward the west-northwest at a gradient of 0 008 ftlft I Ground water elevation data collected in the Primary Aquifer Zone (130 to 150 feet bsg) from Flag ' City Chevron monitoring wells MW-8C,MW-9C and MW-10E indicated that the ground water flow direction was generally west at an average gradient of 0 003 Rift (Figure 8), the ground water flow direction in the area of Flag City Chevron wells MW-11D, MW-12D and MW-13D indicated that ' the ground watenflow direction was'generally toward the west-northwest at a gradient of 0 008 ft/ft t R ` r 5 4 2 Laboratory Results Of Ground Water Samples ' During the August 2000 sampling event, TPH-g was detected in samples from wells MW-11B and MW 13A at concentrations of 230 and 630µg/1,respectively; TPH-d was detected at wells MW-9C, MW-11B, MW-11C,MW-12A, MW-13A,MW-13B, MW-13C and MW-13D at concentrations as high as 2,000µg/l a' Toluene tivas detected in the MW-8C sample at a concentration of 0 56µg/1,BTEX compounds were detected in-the water sample collected from well MW-13A at concentrations as high as 130 µg/1, toluene and xylenes were detected in the water sample collected from MW-13D at concentrations as high as 13 Aig/l r , Advanced GeoEnwronmentai,Inc- '