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otherwise noted, a smoothness factor (SF) of 1.0 (on a scale of 0 to 1) <br />was used, which results in maximum "smoothing ". <br />- Alluvium. Two wells are sampled in the Grassy Creek alluvium. Well 71 <br />monitors the alluvium upstream of mining at the PSCM. It displays an <br />increasing TDS trend; with the peak occurring in May 2013. Well 70 <br />monitors the alluvium below Seneca II (and the PSCM) and also downstream <br />of the confluence with Scotchmans Gulch. It displays a stable TDS trend; <br />with the peak TDS value occurring in September 2014. <br />In the Cow Camp Creek alluvium (below NPDES 004 Pond), water quality is <br />measured at one well. Well 69 displays a decreasing TDS trend since <br />October 2004. <br />- Wadge Overburden. Five wells are used to monitor the water quality in <br />this stratum. Well 42, located in the south central part of the permit <br />area, usually does not have enough water in its casing to sample, but <br />did have enough water in May 2014 and displays an increasing trend. <br />Wells COV23, COV2633 and COV2702 were first sampled in 2008. Well 23 <br />displayed an increasing TDS trend, while Wells 2633 and 2702 displayed <br />decreasing trends. However, the range of all historic TDS values, 560 to <br />810 mg /1, is relatively low when compared to what is observed in other <br />aquifers in the area. Well COV11 was first sampled in May 2011. This <br />well displayed a decreasing TDS trend. <br />- Wadge Coal. Five wells are used to monitor the water quality of this <br />seam. Well 17 is located just west of NPDES Pond 002. It displays a <br />stable TDS trend (SF 0.5); with the peak value occurring in 2008. Well <br />19 is located a little over a mile upstream of NPDES Pond 002. It <br />displays a stable TDS trend. Wells CW23, CW2632 and CW2701 were first <br />sampled in 2008. Wells 2632 and 23 displayed decreasing TDS trends, <br />while Well 2701 displays an increasing TDS trend. All wells, except Well <br />17, display TDS values between 610 and 970 mg /1. <br />- Trout Creek Sandstone. Well STC5 was previously as the potable water <br />supply for the PSCM. Due to a pump failure, the last sample from this <br />k, <br />