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• Figure 2 During the UST removals, a total of seven soil samples (1T through 3T), two from beneath each 10,000-gallon UST and three from beneath the 12,000-gallon UST were collected from the floor of the UST excavation A total of nine soil samples, one from beneath each product dispenser (Dl ' through D-5)and one beneath every 20 linear feet of product piping(P 1 through P4)were collected Also, four two-part composite samples(SP-1 through SP-4)were collected from the soil stockpile ' Soil samples were collected beneath the former USTs at depths of 14 to 16 feet bsg beneath the product dispensers at 3 feet bsg, beneath the product piping at depths of 3 5 to 4 feet bsg and from the stockpiled soil excavated from the UST excavation Soil samples were analyzed for total ' petroleum hydrocarbons quantified as gasoline (TPH-g), volatile aromatic compounds - benzene, toluene, ethylbenzene and total xylenes (BTEX), and fuel oxygenates - di-isopropyl ether(DIPE), ethyl-tertiary butyl ether (ETBE), methyl-tertiary butyl ether (MTBE), tertiary-amyl methyl ether (TAME) and tertiary butanol (TBA) ' TPH-g was detected in three of the seven soil samples collected beneath the former USTs at concentrations of 1 0 milligrams per kilogram (mg/kg) (ITC-15 5), 2,300 mg/kg (2TW-I5 5) and 1 1 mg/kg (3TW-15 5) TPH-g was also detected in one of the five soil samples collected beneath the product dispensers at a concentration of 17 mg/kg (D2-3) and in one of the four samples from the stockpiled soil at a concentration of 1 0 mg/kg(SP-1) Toluene, ethylbenzene and total xylenes were detected in UST sample 2TW-15 5 at concentrations of 1 1 mg/kg, 8 4 mg/kg and 70 mg/kg, ' • respectively Toluene and total xylenes were detected in soil sample P4-4 at concentrations of 005 mg/kg and 0 016 mg/kg, respectively ' MTBE was detected in 15 of the 20 soil samples collected during the UST removals at concentrations as high as 17 mg/kg (D2-3) Every soil sample collected under the dispensers contained detectable concentrations of MTBE TBA was detected in soil sample 1TE-15 5 at a concentration of 1 3 mg/kg and in all four stockpile soil samples at concentrations as high as 0 67 mg/kg A summary of soil analytical results are presented in Table 1 SITE ASSESSMENT ACTIVITIES On 04 and 05 September 2001,five soil borings(B-1 through B-5)were advanced at the site Boring B-1 was advanced to 40 feet bsg,boring B-2 was advanced to 90 feet bsg,boring B-3 was advanced to 70 feet bsg and borings B-4 and B-5 were advanced to 25 feet bsg Soil boring B-1 was advanced in the western portion of the former and existing UST area through a 12-inch diameter conductor casing During dnRing the soil cuttings began to disrupt the positioning of the casing and boring B-1 I was abandoned at 40 feet bsg, 50 feet short of the proposed 90-foot total depth Boring B-2 was advanced fifteen feet west of boring B-1 to 90 feet bsg as a continuation of boring B-1 ISoil underlying the eastern portion of the site, in the area of the former and existing USTs, is • impacted by TPH-g, BTEX compounds and MTBE TPH-g and BTEX contamination was not encountered beyond 80 feet bsg and MTBE contamination was not encountered beyond 50 feet bsg Advanced CeoEnvironmental,Inc I