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MT. A..Ms ' <br />' 3.2 ANALYTICAL RESULTS <br /> • <br />' A summary of the organic and inorganic analytical results of the September 1997 groundwater <br /> sampling are presented in Tables 3-3 and 3-4, respectively Historical groundwater analytical <br /> results are presented in Table A-2 in Appendix A The analytical reports and Chain of Custody <br /> forms are presented in Appendix C An evaluation of the inorganic analytical results will be <br />' presented in the CAP <br /> Petroleum hydrocarbons detected in the sample collected from MW-2A include benzene (920 <br />' µg/L), toluene (150 µg/L), ethylbenzene (870 µg/L), xylene (550 µg/L), and TPH-G (11,000 <br /> µg/L) The concentrations of benzene, toluene, and xylene had decreased by over 50% from <br />' the previous sampling event Concentrations of ethylbenzene and TPH-G were also decreased <br /> since the previous sampling event <br />' Petroleum hydrocarbons were not detected in the sample collected from upgradient well MW-9 <br /> I• <br /> I <br /> I <br /> I <br /> • <br /> L UPROJECCSLSANJOQUISAUISA 97 SEP 9 November 1997 <br /> I <br />