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• - Site YSGF5. 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 a£f ected more by <br />the Seneca II Mine than the Yoast Mine. TDS values recently exhibit a <br />stable trend (SF=0.5). <br />Springs <br />- Spoil Spring 1 (YSSPGI). This spoil spring was discovered in <br />September 2002, Zt is located just above the old haul road culvert <br />crossing Annand Draw. Zts TDS plot indicates an increasing trend. <br /> - Spoil Spring 2 (YSSPG2). This spoil spring was discovered this May <br />• below Stock Pond 011A (i.e., above NPDES Pond 011). <br />- Spoil Spring 3 (YSSPG3). This spoil spring was discovered this <br />September above NPDES Pond 012. <br />Comparison of Surface Water Quality to Water Use Standards. SCC has <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, December 2005). <br />Table 10 provides a comparison of surface water quality to agricultural <br />standards. This Paradox database generated table does not include the <br />units of concentration (mg/1 or ug/1) for each parameter. The units used <br />for each parameter are the same as those listed on the standards table <br />(Table 9) and are also the same as those used in the water quality <br />• reports. The frequency column on Table 10 indicates the number of <br />exceedences out o£ the total number of samples (i.e., 1/2 indicates one <br />12 <br />