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Figure E.5 <br /> N-15 Hydrocarbon Concentrations <br /> 1,000,000 1000 -- <br /> General Long-Term Trend <br /> --4--Benzene(ug/L) <br /> 100,000 100 Toluene(ug/L) <br /> Ethyl benzene(ug/L) <br /> N <br /> N Total Xylenes(ug/L) <br /> —.*--Benzene,HS(ug/L) <br /> 10,000 I 10 v —a Toluene,HS(ug/L) <br /> � F— Ethyl benzene HS(ug/L <br /> N d —Total Xylenes,HS(ug/L) <br /> p Z a TPH-gasoline(mg/L) <br /> —TPH-diesel(mg/L) <br /> 1,000 1 <br /> IM TPH-gas,HS(mg/L) <br /> TPH-diesel,HS(mg/L) <br /> U A Q NAPH Thickness(feet) <br /> x O <br /> LLI � Start of Bio Pilot Study <br /> m 100 0 0.1 <br /> c <br /> m <br /> v <br /> ALIc <br /> O <br /> Awit <br /> ' U <br /> 2 <br /> 10 0.01 <br /> Note: <br /> Q Only detected values shown. <br /> 1 0.001 <br /> 1990 2000 2010 2020 2030 2040 2050 <br /> AX1001182027SCO <br />