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Graph 5 - Concentrations of Hydrocarbons in Well NP-2-60 during C-Sparge System Operation ` <br /> .� <br /> 8000 <br /> 25000 <br /> 7000 <br /> Additional Sparge Points Installed <br /> 20000 — -- ---- - — <br /> 6000 <br /> 5000 <br /> 15000 --— <br /> C. <br /> c. <br /> Q 4000 <br /> CL d <br /> a N <br /> - <br /> x <br /> a ' <br /> � Baseline —_ <br /> Joao <br /> 10000 <br /> 2000 <br /> 5000 --- - ---- — <br /> Began Pilot Test <br /> 1000 <br /> 0 <br /> 0 <br /> o o 0 0 0 °'� °'� o� ooo'` \o� \°� \°� \°�' �\°� o\°� °� �� \°� o\°� \°� °� \°� � � �°\° <br /> �\�' ,b0\�' rl'�\° \°'`\° \° �\° ° \° ►�\`�°\° r1;�\ \ \ °\ h\�\ 4�\`t� � N� \�� �ryh h\� 't�^ \� °\� ��`\� 1\� � ��� h\� �\ �\' 15 <br /> Sampling date <br /> —�--TPHg (in ppb) —0 benzene (in ppb) <br />