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Copper, Dissolved <br /> 0.035 <br /> 0.03 <br /> 0.025 --■— mw-1 <br /> Q- MW-2 <br /> 0.02 <br /> —.— MW-3 <br /> —o— MW-4 <br /> 0.015 <br /> —*— MW-5 <br /> 0.01 - SB-1 <br /> 0.005 <br /> 0 <br /> Jan-88 Jan-89 Jan-90 Jan-91 Jan-92 Jan-93 Jan-94 Jan-95 <br />