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�. 8021B The effluent vapor laboratory results for July 17, August 7, and September 4, 2001 indicate <br /> TPH-g, benzene, and MTBE concentrations to be below the method detection limit A copy of the <br /> vapor well-head laboratory analytical results, and copies of vapor inlet/outlet laboratory analytical <br /> results are presented in Appendix D A historical summary of hydrocarbons removed by vapor <br /> extraction is presented in Table 2 Field Status Reports for the system are presented in Appendix <br /> C <br /> Due to the increase of MTBE in well MW-5, Thrifty requests that a 24 hour groundwater pump test <br /> be performed on this well to determine if it is feasible to install a groundwater pump and treat <br /> system The pump test would consist of pumping constantly on this well and recording necessary <br /> data to determine the feasibility and the pumping rate that can be applied to this well due to the <br /> lithology surrounding it If the groundwater extraction test shows it is feasible to remove <br /> hydrocarbon impacted groundwater, Thrifty will then submit a remediation design for groundwater <br /> extraction from well MW-5 <br /> Thrifty will continue the current groundwater monitoring and sampling program, and continue to <br /> operation of the vapor extraction system All interpretations expressed in this report are based upon <br /> solely upon the review of data collected by EMC, and analysis by Associated Laboratories <br /> Written by Reviewed by <br /> %q11 3; <br /> No 7 <br /> 4Rond 2C REAII Larry Higinbotham W. COF <br /> �L`FaQ <br /> Project Manager, MBA Registered Geologist #5497 <br /> Senior Environmental Hydrogeologist <br />