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r- f r <br /> Figure E.5 <br /> N-15 Hydrocarbon Concentrations <br /> 1,000,000 1000 <br /> General Long-Term Trend <br /> 100,000 100 <br /> d <br /> d <br /> w <br /> N <br /> N <br /> N <br /> C <br /> J 10,000 10 v <br /> m s <br /> M- Benzene (ug/L) <br /> X <br /> —�—Toluene (ug/L) <br /> Z --*—Ethyl benzene (ug/L) <br /> c <br /> 1,000 1 —X Total Xylenes (ug/L) <br /> rn tTPH-gasoline (mg/L) <br /> E <br /> p --+—TPH-diesel (mg/L) <br /> X a —�NAPH Thickness(feet) <br /> W — Start of Bio Pilot Study <br /> m 100 0.1 <br /> c <br /> m <br /> c Note: <br /> U <br /> Only detected values shown. <br /> 2 <br /> 10 0.01 <br /> 1 0.001 <br /> 1990 2000 2010 2020 2030 2040 2050 <br /> Appendix_D_E_Time_Series_Charts2.xls,E,5-N-15 <br />