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Figure E.4 <br /> N-8 Hydrocarbon Concentrations <br /> 1,000,000 1000 <br /> General Long-Term Trend <br /> ------------- <br /> 100,000 100 <br /> m <br /> a <br /> w <br /> N <br /> N <br /> d <br /> C <br /> Y <br /> 3 10,000 10 Q <br /> rM 3 <br /> H Benzene(ug/L) <br /> y = tToluene (ug/L) <br /> a <br /> o Z --&—Ethyl benzene (ug/L) <br /> L° - —x—Total Xylenes (ug/L) <br /> 1,000 1 <br /> C % <br /> u � tTPH-gasoline (mg/L) <br /> cTPHdiesel (mg/L) <br /> O u <br /> U c t NAPH Thickness (feet) <br /> 41 0 <br /> WM Start of Bio Pilot Study <br /> m 100 0.1 <br /> d <br /> U <br /> c Note: <br /> 9 'WIT °U Only detected values shown. <br /> 10 0.01 <br /> 1 0.001 <br /> 1890 2000 2010 2020 2030 2040 2050 <br /> Appendix_D_E_Time_Series_Charts2.xls,EA N-8 <br />