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Trend Evaluation 15 <br /> CC- 30: pH <br /> Henderson Mine <br /> 7.8 <br /> 7.6 <br /> 7.4 <br /> 7.2 <br /> 7 <br /> 6.8 <br /> c <br /> �a <br /> 6.6 41 <br /> i <br /> j <br /> 6.4 <br /> 6.2 <br /> 6 <br /> 5.8 <br /> Sample Date <br /> —40—pH, Field (Standard Units) <br />