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70 <br /> Dissolved Concentrations TPH-g <br /> 12,000 <br /> 10,000 <br /> 8,000 <br /> a� <br /> e MW-2 <br /> �? 6,000 mw-5 <br /> y <br /> 4,000 <br /> 2,000 <br /> Q �. <br /> Mar-97 Jul-98 Dec-99 Apr-01 Sep-02 Jan-04 May-05 Oct-06 <br /> date <br />