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. In the Cow Camp Creek alluvium (below NPDES 004), water quality is <br /> measured at two wells. Well 46 displays a varying TDS trend (SF 0.5), <br /> rising and falling for no apparent reason. Since 1999, the trend has <br /> been stable . Well 69, located below 46, overall displays a decreasing <br /> TDS trend, although the trend has been generally stable since 1997. <br />Well 68, completed in the Bond Creek alluvium (below NPDES 008), was <br />drilled along with Well 69 (see above) in 1988. It displayed a slightly <br />increasing TDS trend. <br />- Wadge Overburden. Well 42, located in the south central part of the <br />permit area, usually does not have enough water in its casing to sample, <br />as was the case this year. Milliequivalent data and the TDS plot from <br />previous samples have been included in Appendix C. <br />- Wadge Coal. Two wells are used to monitor the water quality of this <br />seam. Well 17 is located just west of NPDES 002. It displays an <br />increasing TDS trend. Well 19 is located in the southwest part of the <br />permit area. It displays an overall stable TDS trend. <br />- Wolf Creek Overburden/Wadge Underburden. Three wells are used to <br />monitor this stratum. Well 7 is located below the Wolf Creek pit. It <br />historically displayed an increasing TDS trend (SF 0.5), although <br />recently it has stabilized. Well 8P1 is located below a reclaimed <br />portion of the Wadge pit in the southwest corner of the permit area. <br />The TDS values for this well have stabilized. Well 11 is located just <br />west of the PeaCOCo Pond, below a reclaimed portion of the Wadge pit. <br />It displays a decreasing TDS trend. <br />- Trout Creek Sandstone. Well 5 is used as the potable water supply for <br />the Seneca II Mine. Zt has recently displayed a decreasing TDS trend <br />(SF 0.5). <br />- Spoils. Two wells monitor the spoils above NPDES 002. Well 26, the <br />upper well, displayed an increasing TDS trend until 1990/1991, but have <br />7 <br />