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Third Quarter 2005 <br /> Thnfty#172 <br /> October 25, 2005 <br /> Page 4 <br /> pounds per hour Overall, the hydrocarbon removal rate is 5 48 pounds per hour as of September <br /> 27, 2005 Field Status Reports are included in Appendix C and air analytical results are <br /> provided in Appendix D <br /> A historical summary of hydrocarbons removed by vapor extraction is presented in Table 3, vapor <br /> sample analytical results for the individual wells sampling are presented in Table 5 <br /> Groundwater Treatment System <br /> The groundwater treatment system was started in conjunction with the vapor treatment system on <br /> April 26, 2001, and the flow meter started at zero Presently, the remediation system is <br /> connected to groundwater well MW-11 A down-well pneumatic pump draws water into a 150- <br /> gallon polyvinyl tank, which then transfers the water through two (2) one thousand-pound <br /> granular activated carbon canisters in series <br /> During the reporting period, the system was shut down for carbon exchange on August 1 and <br /> restarted on August 8, 2005, and for quarterly sampling from August 22, 2005 and restarted on <br /> August 29, 2005 A total of 44,760 gallons of water were treated and discharged during the <br /> reporting period, and 582,804 gallons had been treated and discharged since the commencement <br /> of groundwater treatment through September 27, 2005 Historical groundwater system <br /> operations are reported in Table 4a and 4b, and the quarterly analytical results are presented in <br /> Appendix E <br /> Summary and Recommendations <br /> The soil vapor and groundwater extraction systems were started on April 26, 2001 A total of <br /> 152,894 pounds of hydrocarbons have been destroyed by the vapor extraction system, and <br /> 582,804 gallons of groundwater have been treated by the groundwater system Due to declining <br /> dissolved hydrocarbon concentrations in other onsite wells, Thrifty focused groundwater cleanup <br /> efforts only on well MW-11 during the reporting period <br /> On September 27, 2005, the SVE and groundwater extractions systems were shut down due to <br /> vandalism <br /> • <br />