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' 12 February 2002 <br /> • AGE-NC Project No. 98-0450 <br /> Page 6 of 6 <br />' estimated to be approximately 2,264 gallons. <br /> • The average SVE inlet flow rate was 150 cubic feet per minute (cfn) (Table 5). <br />' • No general concentration trends were evident in the PID field measurements; analytical <br /> results from extracted soil-gas samples have decreased since initiation of the SVE system. <br /> 1 <br /> 5.0. RECOMMENDATIONS <br />' Based upon data collected from the site, AGE recommends: <br /> • Continue quarterly groundwater monitoring and sampling.The next monitoring event should <br /> be scheduled for first quarter 2002. <br /> • Operation of a carbon-based SVE hydrocarbon destruction system and continued operation <br />' of the air-sparging system. <br />'• <br /> 6.0. 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 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 are made from a limited number of <br /> available data points (i.e. soil-vapor samples and monitoring well samples), and the subsurface <br /> conditions may vary away from these data points.No other warranty, expressed or implied, is made <br /> as to the professional recommendations contained in this report. <br /> 1 . <br /> • <br />' Advanced GeoEnviron mental,Inc. <br /> 1 <br />