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' S t 07 July 2000 AGE-NC Project No 98-0448 ' .Page 2 of 12 (TPH-g)were detected at concentrations as high as 1,200 milligrams per kilogram (mg/kg) ` • In June 1994, one soil boring (134)was advanced near the center of the former UST area to a depth of 35 feet bsg Laboratory analysis of soil samples detected TPH-g concentrations Ias lugh as 14,000 mg/kg, volatile aromatic compounds benzene, toluene, ethylbenzene and xylenes (BTEX)were detected at concentrations as high as 1,200 mg/kg Laboratory analysis of a grab ground water sample detected TPH-g at 3,300 micrograms per liter (,ug/1) and toluene at 290 mg/1 Analytical results of soil samples are summarized in Table 1, analytical results of the grab ground water sample are summarized in Table 2 • In October 1994, three soil borings (B-1,B-2, B-3) and three ground water monitoring wells (MW-1, MW-2 and MW-3) were advanced at the site to investigate petroleum hydrocarbon-impact near the former UST area Laboratory analysis of soil samples collected from B-2, MW-1 and MW-2 detected TPH-g at concentrations as high as 1,900 mg/kg, BTEX compounds were detected from MW-1, MW-2, MW-3 and B2 at concentrations as high as 71 mg/kg Initial ground water samples collected from MW-1, MW-2 and MW-3 contained TPH-g at concentrations as high as 97,000 ',ug/1 and BTEX compounds at concentrations ranging as high as 23,000 ,ug/l Analytical results of soil samples are summarized in Table 1, analytical results of ground water samples are summarized in Table 2 • In July and August 1998, four ground water monitoring wells (MW-4, MW-5, MW-6 and I MW-7) were installed at the site to further assess the petroleum hydrocarbon-impact Laboratory analysis of soil samples collected from MW-4 detected TPH-g at concentrations ranging as high as 9 5 mg/kg, BTEX compounds were detected at concentrations ranging as high as 0 56 mg/kg Initial ground water samples collected from MW-4A, MW-4, MW-5, MW-6 and MW-7 detected TPH-g at concentrations as high as 110,000 Ug/1 and BTEX compounds at concentrations as high as 25,000 ,ug/l Analytical results of soil samples-are summarized in Table 1, analytical results of ground water samples are summarized in Table 2 • In June 1999, one ground water monitoring well (MW-8) was installed at the site to further y assess the petroleum hydrocarbon-impact, one ground water extraction well (EW-1) was ,installed to compliment a ground water pump test Laboratory analysis of soil samples I collected from EW-1 detected TPH-g and BTEX compounds at concentrations as high as 3 10 mg/kg, MTBE was detected in soil samples collected from EW-1 at a concentration of 0 0076 mg/kg Initial ground water samples collected from MW-8 detected petroleum hydrocarbons at concentrations as high as 110 ug/1 Analytical results of soil samples are summarized in Table 1, analytical results of ground water samples are summarized in Table 2 • In July 1999, an 8-hour ground water draw-down pilot test (pump test) was initiated at the site to evaluate feasibility of ground water pump and treat as a remedial alternative and to Advanced GeoEnvironmental,Inc f