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Figure E.7 <br /> N-17 Hydrocarbon Concentrations <br /> 1,000,000 1000 - <br /> General Long-Term Trend <br /> The concentrations temporarily increased _ <br /> after pump shutdown for the start of the <br /> biological pilot study and are now steadily <br /> decreasing. 100 +Benzene(ug/L) <br /> 1�Or�00 y — Toluene(ug/L) <br /> w — Ethyl benzene(ug/L) <br /> N ter—Total Xylenes(ug/L) <br /> d <br /> Benzene,HS(ug/L) <br /> J 10,000 10 t — Toluene,HS(ug/L) <br /> rn — Ethyl benzene HS(ug/L <br /> d — Total Xylenes,HS(ug/L) <br /> CO Z — TPH-gasoline(mg/L) <br /> 1 J —TPH-diesel(mg/L) <br /> 1,000 £ �—TPH-gas,HS(mg/L) <br /> U "" —TPH-diesel,HS(mg/L) <br /> C <br /> O <br /> U C NAPH Thickness(feel) <br /> X ,Start of Bio Pilot Study <br /> F- 100 0.1 <br /> C <br /> d <br /> U <br /> C <br /> O <br /> U <br /> 2 <br /> 10 0.01 a- Note: <br /> Only detected values shown. <br /> 1 0.001 <br /> 1990 2000 2010 2020 2030 2040 2050 <br /> Appendix_D_E_Time_Series_Charts.xls, E.7—N-17 <br />