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following completion of required mitigation projects, stability of <br />the mine pool, and cessation of treatment of Cement Creek, is equal <br />to or less than the flow adjusted mean zinc concentration for the <br />reference period, i. e. 1991 to 1995. If the null hypothesis is <br />rejected, treatment at the American Tunnel or treatment of Cement <br />Creek should resume. If the null hypothesis is accepted, it is my <br />opinion that SGC will have met the water quality responsibilities <br />at A -72 proposed for the Consent Decree. <br />