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• area was evaluated by comparing sample anal yte concentrations to the mast stringent standards promulgated or recommended by the CDOH and other agencies. Three eetegories of water quality standards have been established based on water usage: 1) domestic drinking; 2) irrigation; and 3) livestock. Trace metals sampled et springs during the baseline monitoring period were analyzed using the total recoverable technique. Comparisons of trace metal standards were made using total recoverable metal concentrations analyzed in each spring sample collected. Domestic Drinking Yeter Suitebi Lity. As introduced in the previous section titled "Ground Vater Suitability", Table 7-79 presentc a listing of domestic drinking water standards. The standards were comps red against spring sample anelyte concentrations on a spring site basis. The following trace metals listed on Table 7-79 were compered against total recoverable metal concentratfons analyzed in samples collected at each spring: As, Ba, Cd, Cr, Cu, Pb, Hg, Ni, Se, Ag, and 2n. Table 7-27 presents the comparison results in an identical format to Table 7-20 found in the Ground Vater Suitability section of this tab. Table 7-27 shows ell springs monitored • in end adjacent to the Yoest mining area commonly exceed the secondary drinking water standards established for TDS and sulfate. Both Springs YSP G3 and YSPG6 commonly exceed the manganese standard, and Springs YSPG4 and YSPG9 both have exceeded the manganese standard at least once. Also, Spring YSP G3 has shown exceedences of the iron standard. Although the exceedences presented in Table 7-27 involve secondary drinking water standards, the comparisons indicate the monitored springs are unsuitable for domestic drinking water use. Agricultural Voter Suitability. Table 7-21 (previously introduced, see Section "Ground Voter Suitability") presents agricultural (irrigation) standards developed by the Colorado Department of Neelth (CDOX, 1994) end other agencies for ground water. These agricultural standards were compared against sample constituent concentrations measured in each spring monitored. The following trace metals listed for agricultural standards in Table 7-21 were compared against total recoverable metal concentrations analyzed in each spring sample collected: Al, As, Cd, Cr, Cu, Mo, Mi, Pb, Se, end Zn. • Table 7-28 presents the comparison results in an identical format to Table 7-27. Table 7-ZB shows that the manganese agricultural standard was exceeded et two monitored springs, YSPG3 and YSPG9. Also, both the sulfate and total dissolved solids standards were 79 Revised 03/01/95