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Graph 4-Concentrations of Hydrocarbons in Well NP-1-65 during C-Sparge System Operation <br /> Former Unocal Service Station No. 0187 437 East Miner Ave. <br /> Stockton, CA <br /> 100,000 8,000 <br /> 90,000 <br /> 7,000 <br /> 80,000 <br /> 6,000 <br /> 70,000 <br /> 60,000 5,000 <br /> Q Began Microsparge a <br /> CL A. <br /> 50,000 4,000 d <br /> 40,000 <br /> 3,000 m <br /> 30,000 Baseline <br /> Additional Sparge Points Installed <br /> 2,000 <br /> 20,000 <br /> 10,000 1,000 <br /> 0 0 <br /> oSO ti�sq °N\d ��°° �ti°O `�N°'` `3\o'` �o'` '` ��o'` °��o`` '�� �orL ��°� `�°� ��°� ��o� ��°� ��°� �o� �o�o� �o�oK h�o� <br /> oo� ►,`� .�ti �1 �� ��^ �,�\ o�� ,��� 4' o�� (6 NNS Nati ofti °h\ti o�K� �°�^ oo�►. <br /> Sampling date <br /> m--TPHg (in ppb) —0 benzene {in ppb} <br /> • � s <br />