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�f <br /> 06 December 2000 <br /> =� AGE-NC Project No. 95-0100 <br /> _.� Page 6 of 6 <br /> 4.0. CONCLUSIONS <br /> Based upon results of ground water monitoring well sampling, AGE concludes: <br /> The dissolved hydrocarbon concentrations have decreased to near or below laboratory <br /> method detection limits. This decrease is attributed to the vapor extraction and air sparging <br /> activities at the site. An additional ground water sampling event should be conducted.to <br /> confirm the nature of the dissolved hydrocarbon concentrations and evaluate plume stability. <br /> • During the past six months of soil vapor extraction, an estimated 25 gallons of petroleum as <br /> ' gasoline have been extracted. <br /> =-� 5.0. RECOMMENDATIONS <br /> Continue monitoring of ground water wells and soil vapor extraction, the next ground water <br /> monitoring event is scheduled for December 2000. <br /> j 6.0. LIMITATIONS <br /> ==1 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 upon <br /> _ analytical results provided by an independent laboratory. Evaluations of the geologic/hydrogeologic <br /> conditions at the site for the purpose of this investigation were made from a limited number of <br /> available data points (i.e. monitoring wells, soil, air [soil vapor], soil and water samples) and <br /> �17subsurface, conditions may vary away from these data points. No. other warranty, expressed or <br /> 1 implied, is made as to the professional recommendations contained in this report. <br /> <1 <br /> :1 <br /> Advmiced GeoEnvironmental,Inc. <br />