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1 <br />' 28 October 2005 <br /> AGE-NC Project No 95-0130 <br />' Page 12 of 13 <br />' • The average SVE Inlet flow rate was approximately 60 cubic feet per minute, the average <br /> differential pressure measurements were recorded at 130 Inches of water (Table 6) <br /> • The volume of hydrocarbons extracted by the SVE system was calculated to be <br />' approximately 120 gallons(equivalent to 752 pounds)of petroleum hydrocarbons(Appendix <br /> I) between the 08 March 2005 and the 05 April 2005 monitoring periods (Table 7) <br />' • Since Initiation of the SVE system In August 2004, the total volume of petroleum <br /> hydrocarbons extracted is estimated to be approximately 2,340 gallons (Table 7), while the <br /> total mass Is estimated at approximately 6,634 kg, or approximately 14,628 pounds of <br /> extracted petroleum hydrocarbons <br />' The results of pump and treat ground water remediation between 08 March 2005 and 03 June 2005 <br /> are as follows <br />' • Approximately 148,180 gallons of hydrocarbon-impacted ground water were extracted from <br /> wells EW-1 and EW-2, which were completed In the First Zone aquifer(Table 9) <br /> • Dissolved TPH-g was detected from grab samples collected at the Influent end of the <br />' M treatment system at concentrations as high as 50,000 µg11, benzene concentrations as high <br /> as 5,400 }Ig/l and MTBE concentrations as high as 8,500 µg/l Laboratory analysis of grab <br /> water samples collected from the P&T effluent did not detect any constituents of concern <br />' during the second quarter 2005 (Table ) <br /> • Between 08 March 2005 and 03 June 2005, an estimated 59 pounds of petroleum <br />' hydrocarbons were extracted from ground water (Table 9) <br /> • A significant decrease in P&T influent concentrations was evident between the first quarter <br />' 2005 and the second quarter 2005 monitoring events, a plot of the Influent TPH-g <br /> concentrations versus time is included in Appendix K <br /> • Since initiation of the P&T system In November 2004, the total volume of petroleum <br /> hydrocarbon-Impacted water extracted is estimated to be approximately 264,820 gallons <br /> (Table 7), the mass of petroleum hydrocarbons removed from the above total volume of <br /> 264,820 gallons Is estimated at approximately 53 kg, or approximately 117 pounds of <br /> extracted petroleum hydrocarbons <br /> 6.0. RECOMMENDATIONS <br /> Based upon the results of the Second Quarter 2005 Investigation, AGE recommends <br /> Advanced GeuEnviranmental,IUL <br /> I <br />