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7.1 Tank Replacement ' Four single-wall, steel gasoline USTs, and associated piping were removed and four double-wall, fiberglass USTs and associated double containment piping were installed at the Site. The new USTs were installed in the same general area of the Site as the former USTs. Four tank cavity ' wells were installed in the new tank cavity excavation (Figure 4). The wells will allow for future extraction of ground water or gasoline from the tank cavity. ' 7.2 Petroleum Hydrocarbons in Soil at the Limits of the Former Tank Cavity ' Laboratory analyses of eight soil samples collected from the sidewalls of the former tank cavity at a depth of 8 ft bgs indicated TPH-G concentrations ranging from non-detected to 2,600 tmg/kg (ppm), BTEX concentrations from non-detectable to 340 mg/kg, and total lead concentrations from 16 mg/kg to 23 mg/kg (Table 1) Ethylene dibromide was not present above the method detection limits in the four samples analyzed Soil sample SW-8, collected from the north sidewall of the excavation, contained the highest concentrations of TPH-G and ' BTEX 7.3 Petroleum Hydrocarbons in Soil Below the Removed Product Lines Laboratory analyses of five soil samples collected from below the removed product lines at ' depths of 4 ft bgs indicated TPH-G concentrations ranging from 3 2 mg/kg to 1,600 mg/kg, BTEX concentrations from 0 044 mg/kg to 250 mg/kg, and total lead concentrations of ' 28 mg/kg and 37 mg/kg in the two samples analyzed (Table 1) Ethylene dibromide was not present above the method detection limits in the two samples analyzed Soil sample L3, ' collected adjacent to the pump island closest to the AM/PM building contained the highest concentrations of TPH-G and BTEX ' 9 Doc #Als9wor 17