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11 November 1999 <br /> •� AGE-NC Project No 97-0230 <br /> Page 7 of 7 <br /> 6.0. RECOMMENDATIONS <br /> Based on the data collected from the site, AGE recommends <br /> • Additional investigation to determine the lateral and vertical extent of MTBE-impacted soil <br /> Further assessment is warranted north-northeast and southeast from the known petroleum <br /> hydrocarbon-Impacted area <br /> • Installation of ground water monitoring wells to provide repeatable ground water sampling <br /> locations, determine site-specific ground water flow direction and gradient, and to document <br /> petroleum hydrocarbon concentration trends <br /> • A search for all potential ground water conduits within a 2,000-foot radius of the site <br /> • Conduct testing to remediate MTBE in the vadose zone <br /> 70. LIMITATIONS <br /> 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/ <br /> hydrogeologic conditions at the site for the purpose of this investigation are made from a limited <br /> number of available data points (i a soil samples) and subsurface conditions may vary away from <br /> these data points No other warranty, expressed or Implied, is made as to the professional <br /> recommendations contained in this report <br /> i <br /> Advanced GeoEnkironmental,Inc <br />