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April 23, 2015 C- 1981 - 018 /Deserado Mine ZTT <br />LWB 12 -3. LW 1 -8. <br />HYDROLOGIC BALANCE - Rule 4.05 <br />Drainage Control 4.05.1, 4.05.2, 4.05.3; Siltation Structures 4.05.5, 4.05.6; Discharge Structures 4.05.7, <br />4.05.10; Diversions 4.05.4; Effluent Limits 4.05.2; Ground Water Monitoring 4.05.13; Surface Water <br />Monitoring 4.05.13; Drainage — Acid and Toxic Materials 4.05.8; Impoundments 4.05.6, 4.05.9; Stream <br />Buffer Zones 4.05.18: <br />Sediment and erosion control demonstrations can be found outlined in the Backfilling and Grading section of <br />this report and in Illustration 44 of Deserado's permit. <br />SEDCAD demonstration outline 91 is generally the demonstration used for all active pads on site. As stated in <br />Illustration 44 for Dill Sites - Gentle Slopes, this demonstration is for dill sites located on gentle slopes. Types <br />of drill sites include degas borehole sites, exploration /development drill sites, ventilation sites, rock dust sites, <br />etc. Each site must be on 8% or lesser overall grade, have some natural grass filter immediately down gradient, <br />and be cross ripped on contour creating substantial surface roughness. Deserado degas pad sites that were <br />inspected and compared to this demonstration were LWB 13 -1, 13 -2, 13 -3, 13 -4 and 13 -5. Each of the 5 pads, <br />no erosion was observed leaving site. <br />SEDCAD demonstration outline 42 is generally the demonstration used for all current reclamation practices <br />for drill pad sites. As stated in Illustration 44 for Drill Sites with Good Cover, this demonstration is intended to <br />address SAE requirements for drill sites following reclamation once the vegetation community has started to <br />mature producing good ground cover. The modeled site is 0.5 acres in size and has a 25% average slope. Soil <br />properties are modified on all by the much flatter slopes eliminating subsurface interference with permeability. <br />For this demonstration, it should be noted that 25% is based on a worst case scenario in order to achieve AOC <br />along slopes. <br />The majority of the reclaimed pads are along more flat surfaces. The steepest pad inspected was LWB10 -1. <br />This pad was located along a slope and visually, the slope was estimated to be under 25 %. The site was very <br />Number of Partial Inspection this Fiscal Year: 6 <br />Number of Complete Inspections this Fiscal Year: 3 <br />Page 5 of 9 <br />