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Lead (Pb) commonly exceeds drinking water, livestock, and aquatic <br /> life water quality standards in the Yampa River <br /> (Melancon, 1980); increased concentration reported in <br /> mine drainage in Colstrip, Montana (Van Voast, et al., <br /> 1977). <br /> Manganese (Mn) increased concentration reported in mine spoils water at the <br /> Edna Mine (Skogerboe, et al., 1979); concentrations may <br /> increase in waters near surface mines in the western U.S. <br /> (Everett, 1979); effluent limitations from Rule 4.05.2 (7). <br /> Mercury increased concentration reported in mine spoils water at the <br /> Edna Mine (Skogerboe, et al., 1979); commonly exceeds <br /> water quality standards in the Yampa River (Steele, et al., <br /> 1978); may be a pollutant associated with fly ash disposal <br /> in surface mines in the western U.S. (Everett, 1979). <br /> Molybdenum (Mo) increased concentration reported in mine effluent at the <br /> Empire Energy Mine (Empire Energy, 1981); may be a <br /> pollutant associated with fly ash disposal at surface mines <br /> in the western U.S. (Everett, 1979); change in Cu:Mo ratio <br /> could cause molybdenosis in livestock. <br /> Selenium (Se) increased concentration reported in spoils water at the <br /> Edna Mine (Skogerboe, et al., 1979); may be a pollutant <br /> associated with fly ash disposal at surface mines in the <br /> western U.S. (Everett, 1979); coal commonly has a higher <br /> than average selenium concentration (NAS, 1976); the most <br /> highly seleniferous sediments in the U.S. were deposited <br /> during the Cretaceous Period (NAS, 1976), most coal- <br /> bearing strata in Colorado were deposited during the <br /> Cretaceous Period; selenium concentrations in coals and <br /> associated black shales are usually much higher than <br /> average (Latkin, 1973); at a pH of about 8 (common in <br /> Colorado coal environments), selenite may be oxidized to the <br /> soluble selenite ion (Latkin, 1973); harmful to livestock if in <br /> excessive concentrations. <br /> Zinc (Zn) increased concentration reported in spoils water at the <br /> Edna Mine (Skogerboe, et al., 1979); concentrations may <br /> increase in waters near surface mines in the western U.S. <br /> (Everett, 1979); may be a pollutant associated with fly ash <br /> disposal at surface mines in the western U.S. (Everett, <br /> 1979). <br /> The above information was taken from: <br /> http://mining.state.co.us/Programs/Coal/RulesRegs/Documents/OverburdenBaseline.pdf <br /> GCC Energy, LLC King 11 Appendix 4(8A) (PR-10) June 12, 2020 <br />