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I i <br /> Graph 2 - Concentrations of Hydrocarbons in Piezometer NP-1-65 during <br /> C-Sparge System Operation <br /> 100,0008,000 <br /> 90,000 7,000 <br /> 80,000 <br /> 6,000 <br /> 70,000 - <br /> 5,000 <br /> 60,000 <br /> CL <br /> CL <br /> 50,000 CL <br /> 4,000 <br /> � N <br /> F d <br /> 40,000 3,000 m <br /> 30,000 Additions Sparge Points n Iled <br /> 2,000 <br /> 20,000 gegPilot Test <br /> 1,000 <br /> 10,000 <br /> 0 iHiiiiiiiii0 <br /> o �a o o O O . ►. N N N N N N ti ti ti ti ti 0 3 3 3 <br /> h Oh\�ryO, '�\°p'`\° `°��\°\`L°�� moo`°�4`°��`° �\°�°`°�`°�`�°��`°�� ►.`°�h\° ^`° °'` <br /> �`��� ►,� �� �� �� �,� o� .�� o� '� <br /> Sampling date <br /> TPHg (in ppb) --+--benzene (in ppb) <br />