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i <br /> 11 February 2002 <br /> AGE-NC Project No 99-0559 <br /> Page 10 of 10 <br /> sample collected from HU5 at 150 feet The highest concentration of MTBE detected at the <br /> site was from boring CPT3, in HU1 <br /> • TPH-g, benzene and MTBE were detected In the three soil samples collected from CPT-2 <br /> at depths of 80 feet (HU3), 110 feet (upper HU5) and 135 feet bsg (middle HU5) The <br /> vertical extent of impacted soil has not been defined in the source area, however, adsorbed <br /> concentrations decreased significantly with depth(135 feet bsg)and the 135-foot sample may <br /> be inferred to be near the lower margin of impacted soil <br /> • Four CMT have been Installed on site(Appendix B) and quarterly sampling will begin with <br /> Ithe next ground water monitoring event <br /> 5.0. LIMITATIONS <br /> I Our professional services were performed using that degree of care and skill ordinarily exercised by <br /> environmental consultants practicing in this or similar localities The findings were based mainly <br /> upon analytical results provided by an Independent laboratory Evaluations of the geologic/hydro- <br /> geologic conditions at the site for the purpose of this Investigation are made from a limited number <br /> of available data points (CPT data, and soil and ground water samples), and subsurface conditions <br /> may vary away from these data points No other warranty, expressed or Implied, Is made as to the <br /> professional recommendations contained In this report <br /> I <br /> Advanced GeoEnvironmental,Inc <br />