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ISite Background Information Ernie's General Store • Page 2 of 3 1 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 excavation A total of nine soil samples, one from beneath each product dispenser(D 1 through D5) 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 from 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 Soli samples were analyzed for total petroleum hydrocarbons quantified as gasoline (TPH-g), volatile aromatic compounds benzene, ' toluene, ethylbenzcne, and total xylenes (BTEX), and fuel oxygenates dl-isopropyl ether (D1PE), 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 from beneath the former USTs at concentrations of 1 0 milligrams per kilogram (mg/kg) (ITC-15 5), 2,300 mg/kg (2TW-15 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, S 4 mg/kg, and 70 mg/kg, respectively Toluene and total xylenes were detected in soil sample P4-4 at concentrations of 0 005 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 (132-3) Every soil sample collected from under the dispensers contained detectable concentrations of MTBE TBA was detected in soil sample ITE-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 from the UST tank removal is presented in Table 1 of this appendix ISITE ASSESSMENT ACTIVITIES On 04 and 05 September 2001, five soil borings(B-1 through B-5)were advanced at the site Boring B-I 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 each advanced to 25 feet bsg Soil boring B-1 was Iadvanced in the western portion of the former and existing UST area through a 12-inch diameter conductor casing During drilling,the soil cuttings began to disrupt the positioning of the casing and boring B-1 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-I to 90 feet bsg as a continuation of boring B-1 IAdvanced GeoEnvsronmentzl,Inc I