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' t f . 20 January 2000 AGE-NC Project No 95-0173 Page 3 of 14 • TPH-g and TPH-d were detected in three of eight soil samples analyzed at concentrations ranging from 14 mg/kg to 240 mg/kg and from 2 0 mg/kg to 1,700 mg/kg, respectively Toluene,ethylbenzene and xylenes were detected in the same three samples at concentrations as high as 12 ppm(xylenes, B15-10') Neither benzene nor MTBE were detected in the soil samples analyzed • Grab ground water samples were collected from three borings (B 14, B 16 and B 17) TPH-g was detected in the grab ground water samples collected from B 14 and B 16 at concentrations of 2,400/,cg/land 130µg/1,respectively TPH-d was detected in all three grab ground water samples at concentrations ranging from 210 µg/l to 5,400 µg11 Low concentrations of toluene, ethylbenzene and xylenes were also detected in two of the three grab ground water samples Neither benzene nor MTBE were detected in the grab ground water samples TPH-d concentration exceeded TPH-g concentrations in three of the eight soil samples analyzed,the remaining five soil samples did not contain detectable concentrations of either range of petroleum hydrocarbons On 13 May 1998, five soil borings were drilled on-site (B18 and B19) and off-site (B20 through B22) The three off-site borings were completed as ground water monitoring wells MW-6, MW-7 and MW-8,the two on-site borings were dual-completed as remediation pilot-test wells VW-1 and VW-2 Saturated soil conditions were encountered in all borings at a depth of approximately 17 feet bsg • TPH-g was detected in two out of eleven analyzed soil samples'collected from borings B 18 through B21,BTEX was detected in five of the samples The greatest concentrations of TPH- g and TPH-d detected were 440 mg/kg and 1,400 mg/kg, respectively,encountered,in sample B19-20 Toluene, ethylbenzene and total xylenes were detected in the soil samples at concentrations as great as 8 6 mg/kg (xylene) Oxygenated compounds were not detected in the soil samples analyzed Volatile organic compounds(VOCs)were detected in soil samples collected at variable concentrations Analytical results of soil samples are included in Table 1 • Soil samples collected from the Jimco Truck Stop at depths of 20 feet bsg were impacted with TPH-d at concentrations as high as 490 mg/kg and xylenes at concentrations as high as 0 017 mg/kg • Naphthalene was detected at a concentration of 2,600 micrograms per kilogram(ug/kg) The VOC encountered at the greatest concentration in the soil samples was 1,3,5- trimethylbenzene, which was detected at a concentration of 12,000 ,ug/kg Advanced GeoEnvironmental,Inc