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' 17 May 2002 AGE-NC Project No 99-0645 ' Page 2 of 5 I SW)of the excavation,as well as the soil stockpiles, for laboratory analysis On 22 March 2000,the Impacted soil was transported from the site and disposed at Forward Landfill ' TPH-g was detected in excavation soil samples F-1,WW,EW and NW at 6 0 mg/kg,23,000 mg/kg, 29 mg/kg and 32 mg/kg, respectively, TPH-g was not detected in sample SW ' BTEX compounds were detected in all excavation samples except SW,at maximum concentrations of 56 mg/kg benzene, 1,700 mg/kg toluene, 470 mg/kg ethylbenzene and 2,900 mg/kg xylenes in sample WW ' MTBE was detected in all excavation samples at concentrations ranging from 28 µg/kg (SW) to 140,000 µg/kg (WW) TAME was detected only in sample WW at 9,200 µg/kg and TBA was ' detected only In samples F-1 and NW at 6,100 Eig/kg and 100 µg/kg, respectively The composited stockpile soil samples contained TPH-g at concentrations ranging from 1,900 mg/kg ' to 2,100 mg/kg BTEX compounds ranged from below laboratory detection limits (benzene in sample SPA-D) to 280 mg/kg(xylenes In sample SPH-L) MTBE, TAME and TBA were detected as high as 3,000 µg/kg, 240 pg/kg and 3,500 µg/kg, respectively Analytical results of soil samples lie are summarized on Table 1 ' AGE calculated that approximately 126 gallons of gasoline were removed in the soil excavated during the Interim remediation The highest concentrations of petroleum hydrocarbons compounds left In place were detected in the sample collected from the western wall of the former excavation ' Lower concentrations of petroleum hydrocarbons as gasoline were also detected in the floor sample and samples collected from the north and west sidewalls Fuel oxygenates,Including MTBE,TAME and TBA were detected In all samples I 22 SITE ASSESSMENT ' On 15 through 17 October 2001, six soil borings (B1 through 136) were advanced at the site, three soil borings, B1 through B3, were established as ground water monitoring wells MW-1 through IMW-3, respectively Soil in the area of boring B1 (MW-1) and locally borings B4 and B5 was found to contain high concentrations of petroleum hydrocarbons at depths of 15 bsg, with reduced concentrations encountered at depths to 70 feet bsg ' Ground water monitoring data from the initial ground water monitoring event on 02 November 2001 indicated that ground water was flowing towards the northeast, and was locally impacted by the oxygenated fuel additive MTBE Advanced GeoF,nvironmental,Inc