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RULE 4 PERFORMANCE STANDARDS <br />Since all available topsoil existing on areas to be disturbed will be removed and reapplied, it will <br />be fully capable of supporting growth necessary for the proposed post -mining land uses. <br />Compaction may be alleviated through chisel plowing or ripping on the contour with a track <br />dozer. The method of topsoil replacement most often used at Colowyo, which makes use of <br />dozers, leaves the surface in a rough condition which minimizes wind and water erosion. The use <br />of other roughening techniques following topsoil replacement and the construction of contour <br />furrows at the time of seeding or before will also aid in erosion control where needed. <br />Collom — Rule 4, Page 24 Revision Date: 9/28/11 <br />Revision No.: PR -03 <br />