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stopped flowing in July. Due to high sediment level, this pond was <br />dredged out in the fall of 2003. Dredging was completed in November <br />2003. TDS values exhibit an increasing trend. <br />- Site YSGFS. This site exists on Grassy Creek below the NPDESII pond. <br />A statistical summary of baseline chemistry data is provided in Appendix <br />D1. Its TDS plot indicates an increasing trend. <br />- Site YSGS. This site exists on Grassy Creek below all discharges from <br />both the Yoast and Seneca II Mines. It became part of the required <br />monitoring program in October 1995. TDS values here are affected more by <br />the Seneca II Mine than the Yoast Mine. Its TDS plot indicates an <br />increasing trend. <br />Springs <br />- Spring YSPG6. This spring (also known as Annand Spring #1) supplies <br />water to the old Annand homestead. In September 2001, no sample could be <br />taken since the pipe that carries discharge from this spring was <br />clogged. Since then, samples have been taken directly from the spring <br />house clearwell. Its EC plot indicates an increasing trend. <br />- Spring YSPG10. This spring is actually an old artesian well (also <br />known as Annand Artesian Well). This wellhead sunk below ground surface <br />in the spring of 2003. Since then, samples have been taken from the <br />standing water above the wellhead. Its EC plot indicates a stable trend. <br />- Spoil Spring YSSPGI. This spoil spring was discovered in September- <br />2002. It is located just above the old haul road culvert crossing Annand <br />Draw. More data will be needed to evaluate the TDS trend, <br />Comparison of Surface Water Quality to Water Use Standards. SCC has <br /> <br />compiled a list of surface water standards for agricultural uses (Table <br />9). This list is composed of CDOH surface water agricultural use <br />standards (CDOH, Reg.31, March 1999). . <br />12 <br />