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below 1000 mg/l, and seasonal TDS variability is evident et YSPG4 end TSPG9, lower concentration durin the s rin into fell increasin Since d ll 1991 TDS et TSPG3 • g p g, . g gra ua y , has been relatively invariant. The lowest TDS concentration measured et ell springs was 342 mg/l at YSPG4 in June of 1993. TDS at Springs YSPG6 end YSPG7 ranges much higher comparatively, from 1060 mg/l et TSPG6 up to 1876 mg/l at TSPG7. Both springs show en opposite seasonal trend in TO S, highest during the spring, lowering measurably during the fell. Sul}ate measurements obtained e[ the Yoast spring sites ranged from 118 mg/l (YSPG4) to 1048 mg/l (YSPG7). Sulfate concentration ranges and seasonal variability patterns mimic TDS ranges and seasonal variability mentioned above for each site. Field pH values collected et the spring sites all ranged from 7.1 S.U. up to 8.08 with no discernible seasonal variability in the slightly alkaline water. Hardness es CeC03 et the Yoast spring sites also followed similar concentration range and seasonal variability patterns previously mentioned for TDS. Hardness was measured lowest at YSPG4 (304 mg/l) and highest at YSPG7 (1099 mg/l). Hardness values measured during the • baseline period indicate all water discharged from springs within end adjacent to the Yoast mining area is very hard. Detectable concentrations of several trace elements have been measured et the Yoest spring sites, including Al, As, B, Ba, Cd, F, Fe, Mn, Hg, Mo, Ni, Se, and 2n. Of these, only iron (Springs YSPG3, YSPG4, YSPG9, end YSPG10) and manganese (Springs YSPG3 and YSPG9) have been deteeted et concentrations greater than 1.0 mg/l. Sorino water Suitabili[v. Present Spring Use. Spring water rights within end prozi mete to the Yoast mining area are discussed in Tab 16, Protection of the Hydrologic Balenc e, of this PAP. Pater rights ere listed in Table 16-1 and locations are shown on Ezh ibis 16-1. In all, 19 water rights for springs have been identified in the vicinity of the Yoest mining area. These springs are righted for several uses, including domestic, irrigation, stock, and even fishery (Eskridge Spring 1, Teb 16). The reader is referred to Tab 16 for additional information regarding spring water rights. • Potential Spring Use. The potential suitability of springs monitored at the Yoast mining 78 Revised 03/01/95