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Graph 3 <br /> MTBE Concentrations vs Time = <br />` Former BP Oil 11192 <br /> 200000 50 <br /> 150000 50 _.p _MST-9 <br /> 00 <br /> R <br /> — S-2 <br /> C ---x---S-3 <br /> n --)K---S-4 <br /> 0 <br /> U 100000 50 --O—S-5 <br /> w <br /> I F <br /> i <br /> 5000050 <br /> r <br /> 050 <br /> Apr-90 Jan-93 Oct-95 Jul-98 Apr-01 Jan-04 <br /> Time <br />