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Synthetic Precipitation Leaching Procedure (SPLP) tests will be conducted on representative <br />tailings samples to determine the waste's potential for leaching any toxic or acid forming materials. <br />The initial test will be conducted once the mill is running and before any tailings are placed in <br />their permanent location. The test results will be presented to the Division and no placement will <br />occur until the Division has approved the results and the overall placement plan. Based on the <br />premise that the tailings are inert, no base liners or special capping layers will be required for the 2 <br />tailings piles. <br />In addition, unlike any of the tailings embankments of the past, the two piles shown on the Site <br />Plan Map for this permit will be graded to a slope no steeper than 311:1V, and the surfaces will be <br />covered with at least 12 inches of fine topsoil, and then vegetated according to the <br />recommendations of the DRMS, County and the NRCS. The details of the revegetation plan are <br />included in Exhibit E — Reclamation Plan. Additional SPLP tests will be conducted on the tailings <br />annually and will be reported to the Division in the Annual Report to ensure that the tailings are <br />inert on an ongoing basis. <br />For surface water handling of the waste piles, diversions will be placed on the south side of both <br />piles to divert clean water from the piles. Water from the diversions will enter Sneffels Creek <br />directly. Also, collection ditches will gather all surface water runoff from the piles and deliver it to <br />2 sediment ponds, Sediment Pond #1 for the Atlas Pile and sediment Pond #2 for the Revenue Pile. <br />These ponds are designed to contain the full runoff from the 25 year event and a rock lined <br />emergency spillway is employed at each pond in case of larger events. Dewatering pipe spillways <br />are located in each pond to discharge water once it is deemed to meet the CDPHE discharge permit <br />requirements. Detailed surface water system designs are presented in Exhibit G. <br />The Revenue tailings pile is in a historic avalanche path that experiences avalanches on nearly an <br />annual basis. An avalanche can occur from December through May. The avalanche path is shown <br />on Mine Maps C -2, C -3 and C -4. In order to avoid safety issues with this path, Star Mine <br />Operations will control blast the avalanches as necessary and will only haul tailings when it is <br />deemed safe to do so. Tailings will be hauled directly to the Revenue Pile but will use County Road <br />Revenue Mine August 2012 T - <br />