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r- r- r - r I i I r r r._ I IF <br /> Figure D.6 <br /> N-15 Hydrocarbon Concentrations <br /> 1,000,000 1000 <br /> Benzene (ug/L) <br /> t Toluene (ug/L) <br /> t Ethyl benzene(ug/L) <br /> 100,000 100 Total Xylenes (ug/L) <br /> m <br /> o Benzene, HS(ug/L) <br /> a o Toluene, HS(ug/L) <br /> d <br /> 5 a Ethyl benzene HS(ug/L <br /> J 10,000 10 t r Total Xylenes, HS(ug/L) <br /> m I— <br /> TPH-gasoline (mg/L) <br /> p • 0' Z — TPH-diesel (mg/L) <br /> 1,000 1 J o TPH-gas, HS(mg/L) <br /> E — TPH-diesel, HS(mg/L) <br /> c <br /> o t NAPH Thickness(feet) <br /> U <br /> X 0 « Start of Bio Pilot Study <br /> LU 100 0.1 <br /> m c <br /> m <br /> c <br /> Note: <br /> V only detected values shown. <br /> 10 0.01 H <br /> 1 0.001 <br /> 1990 1995 2000 2005 2010 2015 <br /> Appendix_D_E_Time_Series_Charts2.xls,D.6 N-15 <br />