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These tests and the results are discussed in detail in <br />• Section D.3.3 and the results presented in Appendix F of the <br />approved permit. The test results indicate that no acid <br />production or leaching of degradational quantities of any <br />metals or other constituents from the waste rock at the San <br />Luis Project is expected to occur. <br />D.3.4 Facility Construction <br />D.3.4.1 General <br />Facility construction for the amended waste rock disposal <br />areas will be the same as the construction previously approved. <br />Each of the facilities will be constructed with distinct 50- <br />ft benches. It is anticipated that the benches will be <br />constructed by end dumping to a maximum of 50 +t with slope <br />faces at their approximate angle of repose (about 1.5H:1V). <br />Each bench will include a 75-ft horizontal setback to maintain <br />• a 3H:1V overall slope. Foundation preparation will consist of <br />the removal of vegetation and topsoil ahead of the advancing <br />waste rock fill. No additional special foundation preparation <br />is considered necessary. Upon completion of construction, the <br />disposal areas will be regraded to an approximate overall slope <br />of 3H:1V. A 15-ft bench, wide enough for a dozer, will be <br />maintained on each of the horizontal setbacks. <br />The stability analyses and typical sections are discussed <br />in detail in Section D.3.5 of this amendment. Detailed <br />information on construction requirements such as clearing and <br />stripping is presented in Appendix N of the approved permit. <br />D.3.4.2 Waste Rock Disoosal Area Construction Sequence <br />The mining sequence is the same as that presented in the <br />approved permit. Waste rock disposal will also occur in the <br />same sequence except that waste rock scheduled to be disposed <br /> <br />D-6 <br />