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collected so far for Well WOV16, all of them after mining began, and <br />until recently there was normally not enough water to sample. Well <br />WOV17 exhibits a stable TDS trend, however TDS values have decreased <br />since 1998. Well WOV4-1 (II-W South Expansion area) was sampled for the <br />first time ever in May 1999. This well has been dry since then. Due to <br />safety concerns because of its proximity to the highwall, this well was <br />abandoned in August 2003. A replacement Wadge overburden well will be <br />drilled i.n 2004. <br />The Seneca ZI-W PHC predicts annual average TDS values at various Wadge <br />overburden wells. For Well WOV14, a value of 4385 mg/1 was predicted, <br />while a value of 3915 mg/1 was observed this year. For Well WOV17, a <br />value of 4295 mg/1 was predicted, while a value of 8050 mg/1 was <br />observed this year. <br />The predicted value for Well WOV17, 4295 mg/l, was predicated on a 5.5& <br />increase of the premining value of 4072 mg/1, which is an average of <br />several overburden wells. However, Well WOV17 exhibited a premining TDS <br />average value of 8043 mg/1, while the next highest TDS Wadge overburden <br />well (WOV15) had a baseline TDS average of 3741 mg/1. Well WOV17 also <br />exhibited a high degree of baseline TDS variability (min. = 6860, max. _ <br />8586 mg/1). The average TDS value this year, 8050 mg/1, was below the <br />PHC prediction using the average baseline value (8043 + 5.5~ - 8485 <br />mg/1), and is also below a 5.5~ increase of the maximum baseline TDS <br />value (8586 + 5.5~ = 9058 mg/1). Also, as explained previously in the <br />alluvium section, calculated TDS values are often preferable to measured <br />TDS values. The calculated TDS average value this year was 7745 mg/l. <br />More data will be needed to evaluate the long-term TDS trend, however <br />the peak TDS value occurred in 1998. <br />- Wadge Coal. Four wells monitor the Wadge coal seam. Well WW14 <br />exhibits an increasing TDS trend. Well WW16 has not have enough water in <br />it to sample since May 1999. In past years it displayed an increasing <br />TDS trend. Well WW17 exhibits a nearly level TDS trend. Well WW4 exists <br />in the SI-W South Expansion area. Monitoring at this well was resumed in <br />July 1997 after being discontinued in Sune 1985. This well has been dry <br />8 <br />