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Graph 1 -Concentrations of Hydrocarbons .tell U-3 during C-Sparge System Operation <br /> Former Unocal Service Station No, 0187 437 East Miner Ave. <br /> Stockton, CA <br /> 60,000 12,000 <br /> 50,000 10,000 <br /> 40,000 8,000 <br /> CL <br /> CL <br /> 30,000 6,000 41 <br /> C <br /> Qi <br /> m <br /> 20,000 4,000 <br /> Baseline <br /> 10,000 2,000 <br /> Began Microsparga <br /> Additional Sparge Points Installed <br /> 0 0 <br /> °b \°° \°°o\°°°\°,� \°. °\o�°`°,o\°°40\°°°`oo,°�°°^\°oo\°�.�\°�.�\°tiN <br /> ��°o �° <br /> I <br /> o`� o o °`' � o`P RP(a RP r6p,(8^°`��Z'��� ° '� '�'� ���`�� �`'�� <br /> Sampling date <br /> -I<--TPHg (in ppb) -- Benzene (in ppb) <br />