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• standard direct-measurement system. The 9 Mine well showed a decrease during the <br />second quarter with progressively increasing measurements recorded subsequently. <br />Well 84-01 returned measurements within the normal ranges of anticipated values <br />until late in the year when a decreased water level was recorded. These responses <br />are not believed to be mine-related as no unusual activities or additional mining <br />occurred in the vicinity of these wells during 1996, although, the 5 Mine discharge <br />point was recorded with a higher annual average discharge rate than in previous <br />years (Figure 16). CEC will continue to monitor these sites. <br />The groundwater gradient in the Middle Sandstone in the vicinity of the mining <br />operation generally decreases from the southeast to the northwest as reflected on <br />• Figure 11. As previously noted, the water levels reflected in well TR-4 appear suspect <br />and will be validated or refuted with additional data in the future. The piezometric <br />contour map of the Twentymile Sandstone is presented as Figure 12. This gradient is <br />noted to have flattened out considerably according to 1996 measurements although <br />the gradient direction remains generally consistent with previous years data. <br />WATER QUALITY <br />The 1996 water quality data for the two Trout Creek Sandstone Wells do not indicate <br />any water quality impacts related to mining. The water quality data for the Trout Creek <br />Sandstone well (5 Mine Well) is summarized on Tables 5 and 6. A plot of field <br />conductivity measurements is presented in Figure 13. <br />• <br />C-81044 1996AHR, I'\EMPIREWHR\96AHR\EMPAHR96.DOC Page 5 <br />