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Figure E.6 <br /> N-16 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. <br /> 100,000 100 �—Benzene(ug/L) <br /> —*—Toluene(ug/L) <br /> }—Ethyl benzene(ug/L) <br /> N - Total Xylenes(ug/L) <br /> J 10,000 Y ---*--Benzene,HS(ug/L) <br /> C] 1 2 —8 Toluene,HS(ug/L) <br /> 7 t <br /> F- —�Ethyl benzene HS(ug/L <br /> C d - Total Xylenes,HS(ug/L) <br /> i X Z a TPH-gasoline(mg/L) <br /> 1,000 1 J TPH-diesel(mg/L) <br /> TPH-gas,HS(mg/L) <br /> _ <br /> U TPH-diesel,HS(mg/L) <br /> V1 <br /> X NAPH Thickness(feet) <br /> W O <br /> m100 0.1 Start of Bio Pilot Study <br /> a� <br /> O <br /> U <br /> 10 = <br /> 0.01 a <br /> F_ Note: <br /> Only detected values shown. <br /> 1 <br /> 0.001 <br /> 1990 2000 2010 2020 2030 2040 2050 <br /> Append ix_D_E_Time_Series_Charts.xls, E.6-N-16 <br />