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• Ia the Cow Camp Creek alluvium (below NPDEB 004), water Quality ie measured at <br />tmo walla. Well 46 displayed as increaeiaq TDS tread until 1986/1987, then a <br />decrease until 1991, and £iaally ea increase eiace 1991. Tha reaeoa for this <br />TDS "dip.. is unknown. Well 69, locate8 below 46, interestingly 8ieplaye a <br />decreasing TDS tread. <br />Well 68, completed in the Road Creek alluvium (below NPDEB OOB), was 8rillad <br />along with Well 69 (see above) in 1988. It dieplaye a nearly level TD9 tread. <br />- Wedge overburden. Well 47, located is the south ceaeral Dart of the permit <br />area, usually does not have enough water in its teeing to sample, ae was the <br />case this year. Milliequivaleat data from previous eamplea has been included is <br />Appendix C. <br /> - Wadga Coal. Two walla are used to monitor the water Quality of this seam. <br /> Well 17 is located just west of NPDEB 001. it dieylays as increasing TDS tread. <br />• well 19 Se located is the southwest Dart of the permit Brea. Zt displays a <br /> dBCieaeiag TDS tread. <br />- Wolf Creak Overburden/Wedge Daderburden. Throe xalle era used to monitor this <br />stratum. Well 7 ie located below the Wolf Creak pit. It dieplaye as inerensiag <br />TDS trend. Well 8P1 is located below a reclaimed Dortioa of the Wedge Dit is <br />the southwest corner of the permit area. The TDS values £or this well hoe <br />atabillzed. Well 11 ie located just west of the PeaCOCO Pond, below a reclaimed <br />portion of the Wedge pit. It dieplaye a decreasing TD9 tread. <br />- Trout Creek Sandetoae. Well 5 is used ae the potable water supply for the <br />Seneca II Mine. It dieplaye a stable TDS tread. <br /> - 9poile. Three walls monitor the eyoile above NPDEB 001. Well 25, the upper <br /> well, 8oea not display a diatiact TD3 trend. There was not enough water is this <br /> well to sample this year. Well 26, the middle well, displayed an increasing TDS <br /> trend until 1990/1991, but hoe recently decreased. Well 27, the bottom well, <br /> dieplaye as increasing TDS trend. <br />• <br />7 <br />