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Figure E.7 <br /> N-17 Hydrocarbon Concentrations <br /> 1,000,000 1000 <br /> The concentrations temporarily increased General Long-Term Trend <br /> after pump shutdown for the start of the <br /> biological pilot study and are now steadily <br /> decreasing. No trend line is shown for the <br /> 100,000 decreasing concentrations because = 100 <br /> sufficient data are not yet available to <br /> project a long-term trend. <br /> w <br /> N <br /> N <br /> C <br /> Y <br /> a 10,000 10 <br /> rn Benzene (ug/L) <br /> W JIa f Toluene (ug/L) <br /> c Z —&—Ethyl benzene (ugtL) <br /> a <br /> 1,000 1 —W—Total Xylenes (ug/L) <br /> —0 TPH-gasoline (mglL) <br /> 0 +—TPHdiesel (mg/L) <br /> o <br /> c �NAPH Thickness (feet) <br /> U <br /> X o <br /> W <br /> 100 —Start of Bio Pilot Study <br /> 0.1 <br /> c <br /> Is <br /> e Note: <br /> V Only detected values shown. <br /> S <br /> 10 0.01 F <br /> 1 0.001 <br /> 1990 2000 2010 2020 2030 2040 2050 <br /> Appendix_D_E_Time_Series_ChartsZxls,E.7_N-17 <br />