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1 � 1 <br /> 01 May 2000 <br /> AGE-NC Project No 95-0121 <br /> Page 6of7 <br />' (Table 2) The dissolved petroleum hydrocarbon concentrations detected at wells MW-2, <br /> ' MW-3, MW-5 and MW-6 in January 2000 occurred witlun the typical range of hydrocarbon <br /> concentrations previously detected in ground water samples from each well <br /> • Monitoring wells MW-1, MW-2, MW-3, MW-4,MW-5, MW-6 and MW-7 are"drowned", <br /> and yield samples more representative of deeper ground water conditions <br /> • The elevated concentrations of petroleum hydrocarbons detected in samples collected from <br /> wells MW-1, MW-2, MW-3, MW4 and MW-7 indicate that these wells are within or near <br /> the dissolved petroleum hydrocarbon "core area" of the plume (Figure 4) <br /> Based on SVE remediation data collected between 15 February 2000 and 31 March 2000, AGE `r <br /> concludes <br /> 1 <br /> • The volume of hydrocarbons extracted from the inlet of the SVE system was calculated to <br /> be approximately 5 7 gallons of petroleum hydrocarbons (Appendix E) <br /> • SVE flow rates ranged from 18 to 30 standard cubic feet per minute (scfrn) at differential <br /> pressures between 0 10 to 0 30 inches of water <br /> No general trends were established from the PID field measurements possibly because the <br /> SVE and 1AS remediation system were in the start-up phase and the system had not yet <br /> stabilized <br /> 6.0. RECOMMENDATIONS , <br /> Based upon first quarter data collected from the site, AGE recommends <br /> 1 , <br /> • Continued quarterly ground water momtonng and sampling of wells MW-1, MW-2, MW-3, <br />' MW-4, MW-5, MW-6 and MW-7, ground water sampling results will,be used to monitor <br /> progress of the SVE and 1AS remediation system <br /> 4 a <br /> • Continued operation of the on-site SVE and IAS remediation system, remediation progress <br />' will be reevaluated on a quarterly basis <br />' 6.0. LIMITATIONS , <br /> 1 i <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 a monitoring wells, ground water samples, soil-gas vapor samples) and <br /> Advanced CcaEmironmcntal,Inc <br />