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Figure D.6 <br /> N-15 Hydrocarbon Concentrations <br /> 1000 <br /> 1,000,000 <br /> r-4--Benzene(ug/L) <br /> Toluene(ug/L) <br /> Ethyl benzene <br /> 100 - Total Xylenes(ug/L) <br /> 100,000 <br /> w —0—Benzene,HS(ug/L) <br /> Toluene,HS(ug/L) <br /> N <br /> d <br /> Y <br /> ---er—Ethyl benzene HS(ug/L <br /> 10 <br /> L — Total Xylenes,HS(ug/L) <br /> 10,000 �- <br /> a — TPH-gasoline(mg/L) <br /> W O Z T=TPH-diesel(mg/L) <br /> C <br /> O 1 J TPH-gas,HS(mg/L) <br /> r`+ <br /> 1,000 I o E TPH-diesel,HS(mg/L) <br /> d <br /> y -�-NAPH Thickness(feet) <br /> O QI �O—+ Start of Bio Pilot Study <br /> U <br /> X 0.1 <br /> 100 <br /> m � i o <br /> I v <br /> 0.01 Note: <br /> 10 Only detected values shown. <br /> ■ <br /> 0.001 <br /> 1 1990 1995 2000 2005 2010 2015 <br /> Appendix_D_E_Time_Series_Charts.xls,D.6-N-15 <br />