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1 ThirdQ uarter 2004 Thrifty#172 ' October 13, 2004 Page 3 ' Remediation Status Vapor Extraction System ' On April 26, 2001, a new Baker Furnace Thermal Oxidizer Unit was placed into operation with the hour meter reading at zero Presently, the remediation system is connected to soil vapor extraction wells VW-1, VW-2 (A,B), VW-3, VW-4 (A,B,C), VW-5 (A,B,C), and VW-6 (A,B,C) The vapor wells operating during the third quarter of 2004 were VW-3 and VW-5A (100%), VW-5B (50%), and VW-5C (25%) During the third quarter of 2004, the soil vapor extraction ' unit (VEU) operated approximately 592 hours for a cumulative total of 23,215 hours Approximately 3,509 pounds of hydrocarbons were removed during the third quarter 2004 for a total of 92,537 pounds as of September 28, 2004 (Table 3) The hydrocarbon mass removal rates ' via vapor extraction were 5 93 lbs/hour during the reporting period and overall 3 99 lbs/hour as of September 28, 2004 Influent and effluent vapor samples were collected on July 7 and August 26, 2004 In addition, vapor samples were collected on August 26, 2004, from selected well heads The well head, influent, and effluent vapor samples were analyzed for TPHg by EPA Method 8015, and ' BTEXJMTBE by EPA Method 8021B The system was shut down for the month of September due to mechanical problems with the system blower Field Status Reports are included in Appendix C Copies of the influent, effluent, and well head vapor sample laboratory analytical results are presented in Appendix D ' A historical summary of hydrocarbons removed by vapor extraction is presented in Table 3, vapor sample analytical results for the individual wells sampling are presented in Table 5 ' Groundwater Treatment System The groundwater treatment system was started in conjunction with the vapor treatment system on ' April 26, 2001, and the flow meter started at zero Presently, the remediation system is connected to groundwater well MW-11 A down-well pneumatic pump draws water into a 150- gallon polyvinyl tank, which then transfers the water through two (2) one thousand-pound ' granular activated carbon canisters in series During the reporting period, the system was shut down on the following dates July 7 though July ' 13 and restarted on July 13„ 2004 for carbon change out, August 9 on August 19, 2004 for quarterly sampling and carbon change-out, and September 9 restarted on September 28, 2004 for operator vacation A total of 47,820 gallons of water were treated and discharged during the