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in the ~5 Mine discharge water have increased from about 800 <br />• mq/1 in 1982 and 1983 to approximately 1070 mq/1 in 1993. <br />This increase in dissolved solids appear to have leveled off <br />since 1986, with occasional spikes being observed. The <br />average dissolved solids concentration for the 7 North Angle <br />discharge decreased considerably in 1993 to about 875 mg/1 in <br />as compared to the prior two years of 1285 mq/1 in year 1991 <br />and 1992. This trend is related to the accumulation of water <br />in the North Angle Sump location while the pump was out of <br />order. This water was allowed to equilibrate within old <br />workings and rubbelized subsidence panels. The maximum <br />concentrations of 1474 mg/1 represents this equilibrium <br />concentration and also provides an indication of the expected <br />post mining TDS concentrations in rubbelized zone and <br />• underground mine workings. Likewise, this decrease <br />illustrates the effects of flushing upon the TDS <br />concentrations with normal periodic discharge. <br />ALLUVIIIli <br />Sediments in the Williams Fork River Alluvium are monitored. <br />Three wells are in the general area of the loadout facilities <br />and underground discharge sediment ponds. <br />WATER LEVELS <br />Groundwater levels in the alluvium have remained fairly <br />regular, with normal seasonal fluctuations, apparently related <br />• to changes in river levels. Groundwater levels in the alluvium <br />7 <br />