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Quality of Surface Water <br />Farming and irrigation, road drainage and previous mining affect baseline swface water quality above and below the <br />mine. Concentrations of major and trace constituents vary geatly with the rates of flow, evaporation, and the location <br />of sampling. Parameters of concern in water quality studies include total dissolved solids (TDS), sodium, calcium, <br />bicarbonate, sulfate, iron and manganese. <br />PR 03-06 2.04-33.1 03/02/04 <br />