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soils. The final plan incorporates the reclamation of the site and will have established <br /> revegetation on all disturbed areas. <br /> 2. Surface Water <br /> As described in the mine plan,the combination of naturally occurring or pre-law creeks, ditches, <br /> ponds, and drainage structure along the eastern hillslope of Mt. Elbert combined with the limited <br /> disturbed area sediment settling ponds surface runoff from the 100 year 24 hour event will be <br /> diverted around the site,where applicable, and within the site as process water. Existing pre-law <br /> ponds and ditches within the permit area are sufficient in size to provide surface water flow <br /> capacity to contain the 100 year flood on site runoff. Similarly, active mining areas will retain <br /> stormwater during storm events activity. <br /> Gold processing plants will have a series of detention ponds to trap sediment from fine slurry <br /> discharges. These ponds will be cleaned as needed and all silt will be used as substitute topsoil <br /> during concurrent reclamation. Sufficient silt will be left in the ponds to maintain a silt lining to <br /> prevent infiltration. <br /> Due to the coarse soil textures found at the sight, permeability is very high and most <br /> precipitation and runoff percolates quickly into the ground. Surface water flows, in general,that <br /> do not immediately infiltrate will be gathered in silted sediment ponds for evaporation. No <br /> sediment will be allowed to leave the site and cloud any downstream waters. Pre-law gravel <br /> piles and berms around active areas throughout the site ensures that no surface flows may exit <br /> the site. <br /> The two principal ways that the gold operation could affect the water quality of the area <br /> downstream are a)through poor sediment control within the site causing increased sedimentation <br /> downstream, and b)by fuel leakage from a ruptured tank. Water that is encountered in each <br /> extraction pit will not be released from the site. New excavation areas will dewater into adjacent <br /> sediment settling ponds, as needed. No water from disturbed areas leaves the site. Fuel leakage is <br /> also not a problem since all fuel tanks on-site will have secondary containment as well as strict <br /> Spill Prevention, Control, and Countermeasure (SPCC) Plan procedures for spill prevention and <br /> control. <br /> Box Creek Placer Mine Greg I. icki and AsswiatM PLLC <br /> September 2018 G-2 <br />