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i <br /> • Graph 7 - Concentrations of Hydrocarbons in Well U-3 during C-Sparge System Operation <br /> i <br /> 60000 12000 <br /> 50000 10000 <br /> 40000 - -- — ---- - ---- -- - ------_- — 8000 <br /> .� a <br /> CL -- <br /> CL 30000 - - -- ----- - - - -- - - - - --- -- - 6000 <br /> x <br /> a <br /> ,• m <br /> 20000 - -- --- — --- --- - --- ----- — 4000 <br /> 10000 - - -- - ---. _.. _.. . -�_ . _ - 2000 <br /> Baseline - - - - _.. --- - - - - --- <br /> Began Pilot Test Additional Sparge Points Installed <br /> o 0 <br /> \°°` \°� \°� \°° \°° \°� \°� \°° \°° \°° \°° °3 °3 \° <br /> O�\�O OOR, <br /> °�O °�\�ra ��\,`O O�Oh O�\�O °0' 00\O� O���o O��^� Oa\�h Qi O�\,�O 00\�� �O\�� \�� O�\ry^� O�ry� O�\�� 1 �. O��ryO <br /> Sampling date <br /> --w--TPHg (in ppb) +Benzene (in ppb) <br /> s <br />