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constituent values are less than 1.0 mg/1 with the exception of B and F. • <br />Since there is a relatively small water quality data base for the Wolf Creek Coal, long <br />term chemical trends are difficult to discern. Wells CW-52W-2WC and -4WC have the longest <br />sampling history, and both wells show stable chemistry over time. It is also difficult to <br />describe seasonal variations; in general, major ion concentrations are most concentrated <br />in the fall (Figure 7-5), but there is only one spring water quality analysis in the <br />entire data set. <br />Ground Water Suitability. <br />Present Ground Water Use. Ground water rights within and proximate to the Seneca II-W <br />permit area are analyzed in Tab 16, "Protection of the Hydrologic Balance", of this Permit <br />Application Package. Water rights are listed in Table 16-1, and locations are shown on <br />Exhibit 16-1. In all, six ground water rights have been identified in the vicinity of the <br />Seneca II-W mining area. These wells are righted for industrial, domestic, irrigation, <br />and livestock use. The reader is directed to Tab 16 for additional information regarding ~i <br />ground water rights. • <br />Potential Ground Water Use. Potential ground water suitability at the Seneca II-W area <br />was evaluated by comparing sample analyte concentrations to the most stringent standards <br />promulgated by the following agencies: Colorado Department of Health (CDOH), Colorado <br />Mined Land Reclamation Division (CMLRD), U.S. Environmental Protection Agency, and Office <br />of Surface Mining Reclamation and Enforcement (OSMRE). Four categories of water quality <br />standards, based on categories of ultimate use, have been established: 1) domestic <br />drinking; 2) aquatic life; 3) irrigation; and 4) livestock. Receiving stream water <br />quality standards for the Yampa River are covered by the four water quality standards <br />listed above. Material damage cri~te ria established by CMLRD are presented in Appendix <br />7-5. <br />Historical geochemi cal data for samples collected at each monitoring well were evaluated <br />with a computer program that compares sample analyte concentrations with established water <br />quality standards. If a sample value exceeds a standard value, the program notes which <br />site has an analyte concentration that exceeds the standard. The results of the program <br />executed for each category of water quality standards are summarized in Appendix 7-6, • <br />56 <br />