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Livestock standard and, therefore, experienced the same number of exceedences as discussed in the previous paragraph. The fluoride standard 11.0 mg/1) was exceeded only once at each of five sites. The iron standard 15.0 mg/11 was exceeded at nine sites for a total of 35 out of 380 samples. The dissolved manganese standard 10.2 mg/11 was exceeded at 17 sites for a total of 158 ouY of 497. However, only five sites experienced exceedences over 1.0 mg/1. The total manganese standard (0.2 mg/11 was exceeded at 21 sites for a total of 244 out of 859 samples. The molybdenum standard 110 ug/1j appears to have keen exceeded at 16 sites, but all of these are a case where the detection limit exceeds the standard. The nickel standard 1200 ug/11 was exceeded only once at one site. The TDS standard 12000 mg/1) was exceeded at 15 sites for a total of 748 out o7 1279 samples. The sulfate standard 1200 mg/11 was exceeded at 24 sites for a total of 501 out of 569 samples. In conclusion, it should be noted that none of the discharges from Seneca II are used directly for irrigation, but are detected from waters from either the Yampa River or Fish Creek before such use. X. Seneca II Technical Revision 36 12004) Monitoring Program Changes The following changes have been made to the hydrologic monitoring program as it was presented in Permit Renewal J73 11997) on pages 7-336 to 7-355. The tables that have been revised to include these changes are: Table 7.98 (Summary of Ground Water Monitoring Wells!, Table 7-99 (Ground Water Monitoring Frequencies), Ta61e 7-102 (Summary of Surface Water Monitoring Sites) and Table 7- 103 (Surface Wafer Monitoring Frequencies!- . Water level monitoring at Wefl GW-SS-U will be discontinued. Since 7996, a casing obstruction at 138 feet deep has prevented water level measurements !usually greater than 160 feet deep). Water levels land quality) will continue to be monitored at the adjacent Well GW-S8P1-U. Well GW-S10-WC has been included on Table 799. It was mistakenly left oti the table, however, water levels have been measured here every year since 1981. Table 7.99 will be revised to discontinue monitoring at Well GW-SI5-WC. This well was abandoned in 1998 because it was about to be mined out. Water quality monitoring at Well GW-525.5 (spoils above Pond 002) will be discontinued. Water levels will continue to be monitored. Since 1985, only ten semi-annual samples have been able to be collected. There is normally not enough water to sample. Water quality monitoring of the spoils will continue at adjacent down gradient Wells GW-S26-S and GW- S27-S. Surface Water Site SW-S2-1 (Grassy Creek, upstream o1 mining) will be changed from monthly (March to October) to tri~annually (spring, summer and tall). It is SCC's belief that tri-annual monitoring is sufficient enough to determine the hydrological charaneristic's o1 upsveam sites. Monitoring a7 Surface Water Sites SW-S2-10 flower Cow Camp Creek), 71 !upper Fish Creek), 12 • (lower Bond Creek!, and 13 (lower Fish Creek) will occur monthly from May to July. The previous frequency was May to September. TR-36 7-378 Revised 05104