Laserfiche WebLink
01 June 1999 <br /> AGE-NC Project No 95-0137 <br /> Page 4 of 26 <br />' One grab ground water sample was collected from boring B 13 located northeast of the <br /> former USTs Both TPH-g and TPH-d were detected in the grab water sample at <br /> concentrations of 6,500 µg/1 and 450,000 µg/1, respectively BTEX compounds were not <br />' detected in these samples Analytical results of grab water samples are included in Table 4 <br /> With the exception of sample ASB13/10, the concentrations of TPH-d significantly exceeded <br /> concentrations of TPH-g in the soil samples analyzed Sample ASB 13110 contained 1 0 mg/kg TPH- <br /> g and less than detectable concentrations of TPH-d <br /> In October 1996, three soil probe borings (B 14 through B 16) were advanced on the Jimco Truck <br /> Stop located immediately north of the site and one boring was advanced on the site (B 17) During <br />' drilling, ground water was encountered at a depth of approximately 20 feet bsg <br /> • TPH-g and TPH-d were detected in three of eight soil samples analyzed at concentrations <br /> ' ranging from 14 mg/kg to 240 mg/kg and from 2 0 mg/kg to 1,700 mg/kg, respectively <br /> Toluene,ethylbenzene and xylenes were detected in the same three samples at concentrations <br /> as high as 12 ppm (xylenes, B15-10') Neither benzene nor MTBE were detected in the soil <br /> samples analyzed <br /> • Grab ground water samples were collected from three borings (B 14, B 16 and B 17) TPH-g <br /> ' was detected in the grab gi�und water samples collected from B 14 and B 16 at concentrations <br /> of 2,400µg/land 130µg11, respectively TPH-d was detected in all three grab ground water <br /> samples at concentrations ranging from 210 µg/l to 5,400 1,Lg11 Low concentrations of <br /> ' toluene, ethylbenzene and xylenes were also detected in two of the three grab ground water <br /> samples Neither benzene nor MTBE were detected in the grab ground water samples <br /> ' TPH-d concentration exceeded TPH-g concentrations in three of the eight soil samples analyzed, the <br /> remaining five soil samples did not contain detectable concentrations of either range of petroleum <br /> ' hydrocarbons <br /> On 13 May 1998, five soil borings were drilled on-site (B 18 and B 19) and off-site (1320 through <br /> ' B22) The three off-site borings were completed as ground water monitoring wells MW-6, MW-7 <br /> and MW-8,the two on-site borings were dual-completed as remediation pilot-test wells VW-1 and <br /> VW-2 Saturated soil conditions were encountered in all borings at a depth of approximately 17 feet <br /> ' bsg <br /> • TPH-g was detected in two out of eleven analyzed soil samples collected from borings B 18 <br /> through 1321, BTEX was detected in five of the samples The greatest concentrations of TPH- <br /> ' g and TPH-d detected were 440 mg/kg and 1,400 mg/kg,respectively,encountered in sample <br /> B 19-20 Toluene, ethylbenzene and total xylenes were detected in the soil samples at <br /> concentrations as great as 8 6 mg/kg (xylene) Oxygenated compounds were not detected in <br /> Advanced GeoEni ironmental,Inc <br /> t <br />