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Table 13 <br /> Recommended Livestock Drinking Water Concentrations <br /> For the Principal Salts and TDS as Compared to Mean <br /> Water Quality for Site SW-N3, <br /> Nucla Mine, Montrose County, Colorado <br /> Mean Concentration (mg/1 ) for <br /> Site SW-N3 <br /> Chemical Recommended <br /> Parameter Concentration June-Sept. Nov.-Feb. <br /> (mg/1 ) 1980-1986 1985 1985-1986 <br /> Ca 1000 331 261 450 <br /> Mg 500 192 150 260 - <br /> Na 2000 57 39 69 <br /> so 3000-5000 1315 943 1782 <br /> Alkalinity 2000 326 268 370 <br /> TDS 5000 2160 1445 2721 <br /> *Recommended concentrations from McKee and Wolf, 1963; Botz and <br /> Pedersen, 1976; and National Academy of Sciences, 1974. <br /> 40 <br />