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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. Benzene(ug/L) <br /> 100'000 100 —♦—Toluene(ug/L) <br /> 4 Ethyl benzene(ug/L) <br /> N -Total Xylenes(ug/L) <br /> —.*--Benzene,HS(ug/L) <br /> • <br /> a 10,000 10 v " Toluene,HS(ug/L) <br /> F —a--Ethyl benzene HS(ug/L <br /> W d —Total Xylenes,HS(ug/L) <br /> O X Z 8 TPH-gasoline(mg/L) <br /> 1,000 O 1 TPH-diesel(mg/L) <br /> TPH-gas,HS(mg/L) <br /> V <br /> = TPH-diesel,HS(mg/L) <br /> O <br /> U I G �NAPH Thickness(feet) <br /> LXLI Start of Bio Pilot Study <br /> m 100 0.1 b <br /> m <br /> 0 <br /> 11 T <br /> U <br /> IL <br /> 10 I 0.01 <br /> Note: <br /> Only detected values shown. <br /> 1 0.001 <br /> 1990 2000 2010 2020 2030 2040 2050 <br /> AX1001182027SCO <br />