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last used in 2007. These pump lines, which were siphoning water out of <br />Pond 002, were capped off on July 7, 2010. <br />This year's average flow value, 0.033 cfs, is 77% below the historic <br />(1980 -2011) average flow value, 0.144 cfs. This year's below average <br />value is due to retirement of the truck wash system and the below <br />average precipitation noted this year. Review of the TDS plot indicates <br />a decreasing trend, with the peak value occurring in September 2002. <br />- Surface Water Site SW -S2 -3 (SSG3). This site monitors discharges from <br />pre -SMCRA mining areas before they enter Grassy Creek at a point just <br />below Site SSG2. Monitoring at this site was re- established in June <br />1997. This site often dries up in late summer; flow was observed only in <br />April of this year. Review of the EC plot indicates a decreasing trend. <br />Monitoring at this site is not a PSCM requirement, therefore, only field <br />parameters were collected and no flow measurements were made. <br />- Surface Water Site SW -S2 -2 (SSG2). This site exists on Grassy Creek <br />downstream of discharges from PSCM Ponds 002 and 003, but upstream of <br />Site SSG3 and Scotchmans Gulch (Yoast Mine NPDES Pond 010). Review of <br />the TDS plot indicates an increasing trend (SF 0.2), with the peak TDS <br />occurring in September 2006. <br />- Surface Water Site YSG5. This site is the furthest downstream surface <br />water site in the Little Grassy, Scotchmans Gulch and Grassy Creek <br />drainages after exiting the PSCM permit area. Therefore, it is the most <br />significant monitoring site with respect to showing the cumulative <br />effects of mining in this area. It displays a slightly increasing TDS <br />trend, with the peak value occurring in September 2007. <br />The PSCM PAP addresses potential impacts to surface water quality on <br />pages 2.05 -84 to 91 (Vol. 1A). A summary of those impacts is presented <br />on Table 2.05.6(3), page 2.05.89. The Probable Hydrological Consequences <br />(PHC) .focuses on impacts caused by underground mine dewatering. As that <br />scenario has not occurred yet, the PHC predictions are not yet relevant. <br />However, on page 2.05.88, it is stated "...Pond 002 is heavily affected by <br />14 <br />