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® defined by a friction angle of greater than 11.5 degrees. Therefore, the analysis was <br />revised by restricting maximum waste slopes to 3.5H:1 V. The revised analysis reduces <br />the friction angle requirement to 10.5 degrees, which is achievable. <br />3.5.5 Conclusions from Global Stability Analysis for Static Conditions <br />Based on the above results, satisfying a residual internal/interface shear strength envelope <br />defined by a friction angle of 10.5 degrees throughout Module 1 would achieve <br />acceptable factors of safety under static conditions. However, it should be noted that the <br />waste sideslopes should not exceed 3.5H:1 V along the southern and eastern perimeters of <br />Module 1. The western slope can have a sideslope of 3H: IV. Also, the three 20 -foot <br />wide benches, at elevations 300, 350, and 400 feet, should be provided on all three <br />sideslopes. <br />The adequacy of the above static liner shear strength requirement for seismic conditions <br />is discussed in the next Section. <br />® \\.SACRFPI\COMMON\sacDP\2002\PRJ\PJ8\83\835608.2bz.doc, EMCONOW%t Inc. <br />Rev. 0, 07/31/02 <br />3-6 <br />