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<br />Section D.3.4 Facility Construction <br />Section D.3.4.1 General <br />12. The Division recommends that following the (12 inch) topsoil salvaging <br />operations, an additional 24 inches of subsoil be salvaged and stockpiled <br />separately from the topsoil for use in final reclamation efforts. Please <br />identify the subsoil stockpile locations on the appropriate Mining Plan Maps. <br />Section D.5 Mill Facilities <br />15. Detail 11, Typical Section of Perimeter Berm and Facility Pipeline <br />Corridor, of Figure C-12, Heap Leach Pad Typical Details, now illustrates that <br />the Heap pad Perimeter Berm primary liner is not <br />anchored into the berm. Please revise this illustration to indicate the <br />proper Heap Leach Pad liner anchoring design. <br />Review of the newly submitted Tailing Geochemical Laboratory Test (Result, <br />Appendix F.2, indicates that the results are identical to the test results <br />presented in the original Appendix F.2 submittal. Was the newly submitted <br />Appendix F.2 intended to present results form the dewatered tailing, or is <br />that to further appended? Please clarify. <br />18. Please indicate how the tailing material will be sampled to determine if <br />it has been adequately rinsed to achieve the 0.2 ppm free cyanide disposal <br />standard. Please define the proposed analytical test method; length of time <br />before results can be obtained; re-rinsing procedures and locations; and <br />re-testing methods. <br />Section D.6 Tailing Disposal <br />Section D.6.2.2 Geochemical Characteristics <br />21. As noted on the top of the September 16, 1988 Analytical Repot <br />presenting results on extracts from batch tests performed on the hailing <br />material, "the liquid used was deionized water with pH adjusted to 5.5 with <br />dilute H2SO4 (Sulfuric acid)...". Therefore, please discuss what effect the <br />dilute sulfuric acid used in the batch tests have on the sulfate cconcentration <br />reported in the tailing analysis. Can these sulfate data be considered <br />representative? <br />22. In unrelated cyanide solution sampling conducted by the Di vis~~on, in some <br />instances, laboratory analyses have reported higher levels of free cyanide <br />that total cyanide. In consultation with ACZ Laboratories, it was discussed <br />that the problem is most likely resulting from thin-cyanate interfr?rence. <br />