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V <br /> O' 24 August 2000 <br /> AGE-NC Project No 00-0725 <br /> Page 5 of 6 <br />' 42 ANALYTICAL RESULTS OF SOIL SAMPLES <br /> TPH-g was detected in samples BI-15 (boring Bl, 15 foot depth), B2-15, B3-10, 133-15 and B4-15 <br /> at concentrations of 3 6 mg/kg, 16 mg/kg, 310 mg/kg 110 mg/kg and 180 mg/kg, respectively <br /> Benzene was only detected in samples B2-15 at 0 11 mg/kg Remaining BTEX compounds were <br /> detected in samples 112-15, B3-10 and 133-15 at concentrations ranging from below detectable limits <br /> to 0 47 mg/kg of toluene in sample 133-15 MTBE was not detected in any of the soil samples <br /> analyzed <br />' Analytical results of soil samples are summarized on Table I The laboratoryreports p orts (MAI <br /> Sample <br /> ID Nos 37115 - 37124) and chain-of-custody forms are included in Appendix B <br /> 1 <br /> 44 ANALYTICAL RESULTS OF WATER SAMPLES <br />' TPH- was detected in all <br /> g grab ground water samples at concentrations ranging from 370 ,ugll in <br /> 10 <br /> sample B 1-H2O to 55,000 ggll in sample B3-H2O <br /> Excluding sample 135-1-4,0, benzene was detected in the remaining samples at concentrations ranging <br />' from 0 54 ygll in sample B 1-H2O to 160 ftg/l in sample B3-H20 Toluene was detected in all five <br /> ground water samples at concentrations ranging from I 1 to 25 kugll Ethylbenzene was detected in <br /> sample B3-1-120 at 58 ,ugll and sample B4-H2O at 2 5 ,ug/I Xylenes were only detected in samples <br />' B2-1-120, B3-H2O and 134-1-120 at concentrations of 230 4g1l, 120 pg/1 and 1 9 ,ugll, respectively <br /> MTBE was not detected in any of the ground water samples In addition, the remaining fuel <br />' oxygenates were not detected in sample B3-H2O <br /> Analytical results of water samples collected at the site are summarized on Table 2 The laboratory <br />' report (MAI Sample ID Nos 37106 - 37110), chain-of-custody forms and QA/QC are included in <br /> Appendix B <br /> 5.0. SUMMARY AND CONCLUSIONS <br /> The following conclusions are based on the findings of the initial dispenser upgrade and this <br /> investigation <br /> • The soil profile is predominantly silt with a discontinuous sand layer encountered between <br /> • 15 and 20 feet in borings BI and B4 (Figure 3) Saturated conditions were encountered at I0 <br /> to 15 feet bsg in all of the borings <br />