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These values remain low as compared to typical SAR's at other Wedge wells. Wells FBR-11-A and 91M006 • both exhibited lower than normal dissolved solids concentrations and conductivities and elevated pH levels in May. Slightly elevated lead and iron concentrations were detected as well. Well FBR-11-A parameters returned to normal ranges in September with hardness and TDS values slightly elevated relative to previously established ranges. Calcium and magnesium concentrations in we1191M006 rose slightly in September while TDS and pH levels remained unchanged. Some of these occurrences may be attributable to the different sampling methodology utilized by TCC's contractor during the 1995 Water Year. TCC will continue to monitor these occurrences during the upcoming spring monitoring period. TwenNmile Sandstone: During 1995, two Twenrymile Sandstone wells (006-BRDH-7 and 91M005) required monitoring for water levels and field parameters on asemi-annual basis, Monitoring requirements were completed at these sites with field measurements obtained and water quality samples collected during May and September. Tables 5 and 6 provide summaries of the 1994 Water Year data collected at each site. Figures 11 through 14 provide graphical representations of water levels and selected water quality parameters recorded at each site. The potentiometric surface in the Twentymile Sandstone is also generally observed to slope from south to north in monitored wells although elevation differences between the two locations in 1995 were negligible. Water levels were observed to remain stable with no mine impacts apparent. The lower water levels typical • in well 91M005 relafive to well 006-82-48A contlnued to remain apparent. Well 91M005 was established in 1993 to replace well 006-82-48A which was mined through during 1993. No full suite analyses were required at either of these wells. Field measurements are presented in Tables 5 and 6. Field parameter measurements on both Twentymile Sandstone wells monitored during 1995 returned values within anticipated ranges with no mine related impacts evident. Trout Creek Sandstone: During 1995, three Trout Creek Sandstone wells (001-83-106, 001-83-107, and FCM #2) required monitoring for water levels and field parameters on asemi-annual basis. An additional well (008-75-EFC) required an annual water level measurement. Wells 001-83-106 and FCM #2 also required water quality sampling on asemi-annual basis. One water level monitoring omission occurred during 1995. Field parameters were obtained in May from well 001-83-106, however, as the well was actively being pumped, no water level was recorded. Tables 7 through 10 provide summaries of the 1995 Water Year data collected at each site. Table 7a provides the period of record statistical summary of collected data at well 001-83-106. Figures 15 through 19 provide graphical representations of water levels and selected water quality parameters recorded at each site. The potentiometric surface in the Trout Creek Sandstone is complicated by the periodic pumping of well 001-83-106. The potentiometric surface trend prevalent in the Twentymile Sandstone and Wadge • Overburden aquifers is not evident in the monitored Trout Creek wells. The previously monitored well 006- - 83-48C routinely exhibited water levels in the 7100 ft elevation range while replacement well FCM #2 -3-