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i � • <br /> Graph 3 <br /> MTBE Conceu=ons vs Time <br /> Fonmer BP OR 11192 <br /> 20000050 - <br /> 15000050 <br /> 000005015000050 MW-9 <br /> --c7--S-1 <br /> —6 S-2 <br /> —X—S-3 <br /> S4 <br /> U 100000 50 S-5 <br /> w <br /> 5000050 <br /> 050 <br /> Apr-90 Jan-93 Oct-95 Jul-98 Apr-01 Jan,-04 <br /> Time <br />