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�■ rr A r r r r r r r � r � r r r r� r r <br /> Graph 3- Concentrations of Hydrocarbons in Well NP-1-22 during C-Sparge System Operation <br /> Former Unocal Service Station No. 0187 <br /> 437 East Miner Ave, Stockton, CA <br /> 30,000 0 <br /> 25,000 <br /> -5 <br /> Baseline <br /> „ 20,000 <br /> CL <br /> SL -10 <br /> 15,000 w <br /> c A • <br /> c Began Microsparge A Additional Sparge Points Installed -15 <br /> a <br /> ~ <br /> 10,000 - <br /> ♦ A% • <br /> -20 <br /> 5,000 <br /> 0 -25 <br /> � � o o . . . ►. ►. . . . ti ti ti ti 3 3 3 0 0 � h <br /> o • o � 0 0 0 0 0 0 0 0 0 0 0 � 0 0 0 0 0 <br /> Sampling date <br /> —*—TPHg (in ppb) —*--benzene (in ppb) <br /> --A GWE (msl) <br />