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r <br />' 08 August 2005 <br /> . AGE-NC Project No 98-0534 <br />' Page 4 of 15 <br />' samples at concentrations up to 140 mg/kg (DT-E) <br /> BTEX compounds were detected in two of the thirteen soil samples analyzed from the <br /> excavation Soil sample Tl-I contained toluene at a concentration of 0 006 mg/kg and <br />' xylenes at a concentration of 0 03 mg/kg Soil sample T1-F2 contained xylenes at a <br /> concentration of 0 19 mg/kg MTBE was detected in seven of the thirteen soil samples <br /> analyzed by EPA Method 8020, at concentrations up to 0 52 mg/kg (T1-1) The analytical <br /> results of the soil samples are summarized in Tables 1 and 2 Results of the June 1999 <br /> excavation were reported in Preliminary Investigation and Evaluation Report, dated 18 Apnl <br />' 2000, prepared by AGE <br /> • 13 October 1999 - the stockpiled soil from the UST removal and over-excavation was <br />' transported to Forward Landfill for final disposal <br /> • 02 and 03 November 1999-a total of 10 soil probe borings(P 1 through P 10)were advanced �01 <br /> at the site,under observation by EHD Probe borings were advanced in the area of the former Rif l <br /> USTs, over the former dispenser island locations and northwest of the former dispensers to <br /> collect grab water samples Probe boring P3 was advanced to a depth of 15 feet below °per' <br /> surface grade Probe borings P1, P2, P4, P5, P7, and P8 were advanced to a depth of 25 feet <br /> below surface grade(bsg),borings P6,P9, and P10 were advanced to 30 feet bsg, Locations � �(� <br /> of the soil probe bonnu are illustrated on Figure 2 Boring logs for P 1 through P 10 are p <br /> included in Appendix p1biscrete soil samples were collected at 5-foot intervals,beginning <br /> at 5 feet bsg, to total depth of each boring 1' <br /> JVA <br /> TPH-g was detected at concentrations as great as 3 8 mg/kg in soil sample P9-15' TPH-g � <br /> was not detected in soil samples collected at 30 feet bsg TPH-d was detected in soil samples <br /> at 15 feet bsg with a maximum concentration of 360 mg/kg(P9-15') TPH-d was not detected <br />' in soil samples collected from depths greater than 15 feet bsg <br /> BTEX was only detected in two of the soil samples analyzed Soil sample P9-15 contained <br />' toluene at concentrations of 0 02 mg/kg,ethylbenzene at concentrations of 0 011 mg/kg and <br /> xylenes at concentrations of 0 034 mg/kg Soil sample P3-10 contained toluene at <br /> concentrations of 0 077 mg/kg and ethylbenzene at 0 01 mg/kg The greatest concentrations <br />' of BTEX compounds 4etected were generally in soil samples collected near the former UST <br /> area at a depth of I OW6et bsg, BTEX compounds were not detected in the former dispenser <br /> areas Benzene,was not detected in any of the 26 soil samples analyzed MTBE was detected <br /> by EPA Method 8020 in soil from the former UST area at 2*feet bsg with a maximum <br />' concentration of 0 24 mg/kg (P5-10') TBA was detected by EPA Method 8260 in two soil <br /> samples Soil west of the former UST area at a depth of 10 feet bsg contained the greatest <br />' concentration of TBA at 210 mg/kg (P5-10) <br /> Advanced GeoEnvironmental,Inc <br />