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r <br /> Graph 8 - Concentrations of Hydrocarbons in Well U-10 during C-Sparge System Operation <br /> 450 <br /> 7000 <br /> Baseline 4 <br /> 400 <br /> Began Plot Test <br /> ' 6000 <br /> 350 — <br /> 5000 <br /> 300 — <br /> 25040 00 <br /> C a <br /> CL <br /> • CM <br /> a <br /> Additional Sparge Points Installed <br /> IL CD <br /> 200 -- c <br /> m <br /> 3000 m <br /> 150 I <br /> 2000 <br /> 100 <br /> 50 1000 <br /> i <br /> 0 <br /> 000 <br /> 11, <br /> N °`� o0 00 °� °�,� � o°� � 0\ti KIN ���ti ���, °��,y� °foo <br /> Sampling date <br /> i <br /> --� <br /> TPI-Ig (En ppb) —♦—benzene (in ppb) <br /> i <br /> I <br />