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2 pits open at the same time. The dig sites will be backfilled before moving on to a <br /> new dig site. Safety fencing will be erected around open excavations that surpass 4 <br /> feet in depth. The excavations will not exceed 20 feet in total depth,but most will be <br /> less than 20 feet so that we can maintain a 3H:1V ratio from the permit boundary. <br /> As such, we commit to maintain a 3H:1V ratio for distance from the permit <br /> boundary to depth of excavation. If we find that the pit needs to be deeper for <br /> mineral extraction near the permit boundary, then a technical revision will be made <br /> to the permit addressing slope stability analyses to allow for excavations near the <br /> permit boundary. The exact locations of the excavations will depend on the trend <br /> direction and depth of the pegmatite veins. The excavations and stockpiles total <br /> volume will not exceed the total volume of cubic yards shown on Exhibit D, 6.3.4(2). <br /> Sloping of excavated area will be in compliance with U.S. Dept. of Labor, OSHA <br /> Section V: Construction Operations, Ch. 2, Excavations: Hazard Recognition in <br /> Trenching and Shoring, with regard to sloping excavated areas <br /> (https://www.osha.gov/dts/osta/otm/otm_v/otm_v_2.html). Specifically, <br /> including: <br /> IV. Determination of soil type <br /> V. Test equipment and Methods for evaluating soil type. (A pocket <br /> penetrometer will be used to measure the compressive strength of the soil to <br /> assist in the determination of safe sloping. <br /> VIII. Sloping and Benching. <br /> IX. Spoil <br /> We also add that the existing surface slopes are not excessively steep, and the <br /> estimated soil types are Stable Rock, Type A, and to a lesser extent Type B. <br /> 6.3.3 (1) (g) <br /> No roads will be created for the mining operations. An existing 4WD road will be <br /> used for mining access (FS roads 752, 752A, and FS road 274). No new or improved <br /> roads will be made.All equipment will be "walked-in" from these 4WD roads to the <br /> excavations, and "walked-out" at the end of the season with as little disturbance as <br /> possible. All of the temporary access routes will be reclaimed at the conclusion of <br /> the mining project. <br /> 6.3.3 (1) (h) <br /> The operation will be a dry excavation. No water will be used during mining <br /> operations. <br /> 6.3.3 (1) (i) <br /> No ground water or surface water will be disturbed during mining operations. <br /> 6.3.3 (1) (j) <br /> N/A <br /> 6.3.3 (1) (k) <br />