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• those typical prior to 1992. As previously noted, the water level in this well declined during 1997 to [he point that <br />artesian pressures no longer occur at this site. Well 001-83-106 remains drawn down presumably due to <br />consistent pumping. Well 95M001 (FCM#2) held stable during 1998. <br />No measured parameters at well 001-83-106 remmed values outside of previously established ranges during <br />1998, however, pH readings have remained stable, though slightly elevated. TCC will continue to monitor this <br />occurrence. Water quality sample results obtained from well 95M001 are presented in Table 15. The 1998 pH <br />readings continue to be relatively high at this site also. Other monitored parameters appear to vary somewhat <br />from May to September, recording both new minimum and new maximum values for hardness and dissolved <br />calcium. Anew minimum value was also recorded for dissolved magnesium and new maximum values were <br />recorded for lab pH, carbonate, dissolved lead, dissolved manganese, dissolved molybdenum, and ortho-diss <br />phosphate. Water quality sample results obtained from well FBR-2-E are presented in Table 16. High pH <br />readings appear typical for this well also. New minimum values were recorded for pH, hardness, dissolved <br />calcium, sulfate, and dissolved iron and a new maximum value was recorded for SAR. <br />Fish Creek Sandstone: During 1998, two Fish Creek Sandstone wells (91M001 and 91M004) required <br />monitoring for water levels on a quarterly basis. An additional well (Ashley) required semi-annual monitoring for <br />water levels and field parameters, and annual water quality sampling. Monitoring requirements were me[ during <br />the 1998 Water Year at these wells. Tables 17, 18, and 19 provide summaries of the 1998 Water Year data <br />• collected at each site. Many of the parameters tested at the Ashley Well were recorded as new minimums or <br />maximums, due to the limited period that data has been collected at this site. Figure 32 provides graphical <br />representation of the period of record water levels measured at sites 91M001 and 91M004. During the 1998 <br />Water Year, well 91 M001 showed a seasonal fluctuation level but appears to be stabilizing. A similar pattern was <br />noted at well 91 M004, however, the rates of change were much less pronounced. Water levels at the Ashley well <br />were noted at approximately 30' below the established datum in September 1998. <br />A statistical summary of [he water quality data generated for the Ashley well during 1998 is presented as Table <br />19a. The water is a sodium bicarbonate type with a TDS concentration of 520 mg/I. <br />ALLUVIAL GROUNDWATER MONITORING <br />Alluvial deposits containing groundwater are monitored in the Foidel Creek, Fish Creek, Trout Creek and Middle <br />Creek drainages. In the Foidel Creek drainage, sites both upstream and downstream of the TCC portals and <br />support facilities are monitored. In the Fish Creek Drainage, sites upstream and downstream of the Mine 2 area <br />and the Fish Creek Borehole mine dewatering facilities are monitored. During 1994 on Trout Creek, an <br />additional monitoring site was established downstream of the confluence with Fish Creek. During the 1996 <br />r1 <br />LJ <br />-5- <br />