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i <br /> 21 January 1999 <br /> AGE-NC Protect No 98-0450 <br /> Page 7 of 8 <br />' the soils analyzed were above the optimal ranges for microbial growth The microbiological <br /> laboratory report (A Keith Kaufman report dated 17 November 1998) and chain-of-custody form <br /> are included in Appendix C <br /> i <br /> 3 3 HYDROCARBON-IMPACTED GROUND WATER <br />' TPH- , TPH-d, BTEX and oxygenated fuel additives MTBE TBA DIPE ETBE, TAME and <br /> g Yg ( <br /> ethanol) were not detected in the water sample collected from boring B2 Analytical results of the <br />' grab ground water sample analyzed are summarized In Tables 3 and 4 The laboratory reports (MAI <br /> Laboratory ID 98049), QA/QC reports and chain-of-custody forms are Included in Appendix B <br /> 4.0. DISCUSSION AND CONCLUSIONS <br /> Based upon data collected during the October 1998, AGE concludes <br /> • TPH-g and BTEX were detected at high concentrations below the former USTs TPH-g and <br /> BTEX compounds in soil is delineated toward the south west and south by analytical data <br /> from soil samples collected from soil boring BMW-5 and SB7 <br />' • Soil Impacted by petroleum-hydrocarbons was vertical delineated to depths above 60 feet in <br /> the former UST area and above 40 feet bsg in the former dispenser islands However, fuel <br />' additives were not limited to depths less then 40 feet bsg, based on soil analysis from the <br /> western end of the former northern dispenser island (SB5) <br /> i • Benzene in the soil was detected at the highest concentrations below the former UST area <br /> Significant benzene concentrations were also detected below the former northern dispenser <br /> island at depths of 25 feet bsg to 35 feet bsg <br />' • The greatest concentrations of MTBE were detected in soil below the former USTs at depths <br /> of 15 feet bsg to 30 feet bsg <br />' • The greatest concentrations of TBA were detected in soil below the former USTs and In the <br /> area of the former northern dispenser Island at depths of 25 feet bsg to 35 feet bsg, In general <br /> ETBE was also detected below the former northern dispenser island <br /> - • The plume of impacted ground water is constrained on its northern edge by the grab ground x <br /> water sample collected from soil boring SB2 <br /> Advanced GeoEnNironmental,Inc <br />