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Figure 5. Contaminant Coi entration Trends in ATR-2 <br /> MtBE in ATR-2 <br /> 800 <br /> 700 <br /> 3 600 <br /> c 500 A MtBE <br /> 400 Linear(MtBE) <br /> 300 <br /> 200 - <br /> 0 100 <br /> 0 <br /> 9/20/1995 2/1/1997 6/16/1998 10/29/1999 3/12/2001 7/25/2002 12/7/2003 4/20/2005 <br /> Date <br /> i <br /> Benzene in ATR-2 <br /> I <br /> 6 <br /> as <br /> 5 <br /> 3 4 <br /> ♦ ♦ Benzene <br /> 3 ♦ —Linear(Benzene) <br /> 2 <br /> V 1 � <br /> 0 <br /> 7/4/1987 3/30/1990 12/24/1992 9/20/1995 6/16/1998 3/12/2001 1217/2003 <br /> Date <br />