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<br /> 1),
<br /> 19 June 2000
<br /> AGE-NC Project No 96-0232
<br /> Page 9 of 35
<br /> and 170 gg/l, respectively Dissolved ethanol was detected in the 37 to 40-foot and the 70
<br /> to 73 foot samples collected from P 16 at concentrations of 8 5 µg/1 and 8 6 gg/l,respectively,
<br /> dissolved ethanol was detected in the 37 to 40-foot, 55 to 58-foot, 80 to 83-foot and the 111
<br /> to 114-foot samples collected from P17 at concentrations of 13 gg/l, 20 gg/l, 27 gg/1 and
<br /> 20 gg/1 Analytical results of grab ground water samples are summanzed in Table 6,
<br /> analytical results are plotted in cross sectional views GC',D-D'and E-E'(Figures 21,22 and
<br /> 23, respectively)
<br /> Interim remediation measures were initiated at the site by pumping groundwater from EW-1
<br /> at a rate of 2 gallons per minute into a 5,900-gallon above ground storage Baker tank Four
<br /> grab ground water samples were collected from the Baker tank in April 2000 Dissolved
<br /> MTBE was detected in the samples at concentrations of 1,800 gg/l, 1,800 µg/1, 1,600 gg/1
<br /> and 1,000 gg/l Analytical results of Baker tank grab samples are summarized in Table 9
<br /> Eighteen soil borings (P18 through P35) were advanced on-site to depths of 20 feet bsg
<br /> utilizing push point technology to better assess fuel components-impact to soil and ground
<br /> water in and near the fuel dispenser area, the storm drain area and the existing UST system
<br /> at the site Soil boring locations are depicted in Figure 2,boring logs are in Appendix B Soil
<br /> data collected from P20,P21,P22,P23,P27,P29,P31 and P32 were incorporated into cross
<br /> section A-A 'depicted in Figure 9
<br /> Laboratory analysis of the 10-foot soil samples collected from P31, P32 and P34 detected
<br /> MTBE at concentrations as high as 0 72 mg/kg, the 15-foot soil samples from P 19,P20 and
<br /> P22 contained MTBE at concentrations as high as 0 63 mg/kg,the 20-foot soil samples from
<br /> P20, P23, P24, P25 and P26 contained MTBE at concentrations as high as 0 35 mg/kg The
<br /> 10-foot soil samples collected from P31 and P34 contained TBA at concentrations of
<br /> 0 071 mg/kg and 0 12 mg/kg, respectively, the 10-foot soil sample from P31 contained
<br /> TPH-g, TPH-d and BTEX compounds at concentrations as high as 3 2 mg/kg The most
<br /> significant MTBE-impact to soil was encountered in the southern dispenser area, the
<br /> southwestern storm-drain area and around the UST pit Analytical results of soil samples are
<br /> summarized in Table 4 and plotted in cross sectional view A-A'(Figure 9)
<br /> Grab ground water samples collected from P22, P24, P30, P31 and P34 by EPA Method
<br /> 8260M contained dissolved TPH-g at concentrations as high as 11,000 gg/l,dissolved TPH-d
<br /> was detected in samples from P18, P19, P20, P23, P24, P25, P27, P28, P30, P31, P32, P34
<br /> and P35 at concentrations as high as 1,900'µg/1, dissolved BTEX compounds were detected
<br /> in P30,P31, P34 and P35 samples at concentrations as high as-2,900 gg/l, dissolved MTBE
<br /> was detected in P18, P19, P20, P23, P24, P25, P28,P30, P31, P32, P34 and P35 samples at
<br /> concentrations as high as 11,000 µg/l Analytical results of grab ground water samples are
<br /> summarized in Table 6, based on'the results of grab ground water samples collected from
<br /> borings P18 through P35, the inferred extent of dissolved TPH-g, TPH-d and MTBE at the
<br /> Advanced GeoEmpronmenta[,Inc
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