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' MW-9 <br /> . -15 84 ND(0 5) ND (0 5) ND(0 5) ND (0 5) ND (50) <br />' EB-1 NA ND 0 5 ND 0 5 ND 0 5) ND 0 5) ND(50 <br /> Notes ND(0 5) = Analyte not detected, detection limit indicated in parentheses <br />' NM = Not measured <br /> NIA = Not applicable <br /> Wg/L) = parts per billion <br /> 4.0 CONCLUSIONS <br />' Since the last sampling event (November 2001), concentrations of petroleum hydrocarbons slightly <br /> Y <br />' increased in source area well MW-2, and decreased in source area well MW-2A Benzene concentrations <br /> slightly increased in MW-2, and decreased in MW-2A Etylbenzne concentrations decreased in MW-2 and <br /> MW-2A Toluene was not detected in MW-2 as it was in the third quarter 2001 Total xylene decreased in <br /> MW-2 and were not detected in any of the wells including MW-3A which contained xylene concentrations <br /> in the third quarter 2001 sampling event Petroleum hydrocarbons decreased in MW-3A,and concentrations <br /> were slightly above in MW-6 than the May 2001 sampling event No contaminants of concern were found <br /> in MW-4,MW-9,or the equipment blank Low concentrations of petroleum hydrocarbons were detected 1n <br /> MW-5 slightly above the detection limit,and were not detected in May 2001 This will be further evaluated <br /> during future monitoring events <br /> I <br /> L\FR0J8CTS\SANJOQIHSA\1Q01RPr WPD S <br />