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r <br /> r <br /> Graph 4 - Concentrations of Hydrocarbons in Well NP-2-22 during C-Sparge System Operation <br /> 70 <br /> 1800 <br /> 1600 -- 60 <br /> 1400 ------.— - ---- -- -- - --- <br /> 50 <br /> 1200 - --- - --- <br /> 40 .-. <br /> _ a <br /> .� 1000 ---- -- - - --- - - --- - - - — —� — a <br /> v <br /> CL Began m <br /> CM Pilot c <br /> = Test <br /> 30 10 <br /> F- 800 ___ -- -- - _-_-- ------- -------- - <br /> • <br /> 600 - -- <br /> 20 <br /> Additional Sparge Points Installed <br /> 400 <br /> aselin 10 <br /> 200 <br /> 0 <br /> 0 <br /> O\�5b (z, �� \�� moo'\i� � r°\� \"�O\� \^"�\� A\O \'��\O �'��\O \�\O h`1�O O '1'� O �� O `L�'O 4��' �O O O O O -I <br /> oho o�\�. o��L <br /> 16, 1 \ ws \ \ \ \ \ \ \ \ ,�\ ��\ Q� <br /> Sampling date <br /> -i-TPHg (in ppb) benzene (in ppb) <br /> i <br />