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<br />Section D.3.4 Facility Construction <br />Section D.3.4.1 General <br />16. Please specify the methods and disposal locations of vegetation removal <br />planned for the various facility locations. <br />17. Please specify the depth of topsoil removal proposed for the various <br />facility locations. <br />Section D.3.4.2 Waste Rock Disposal Area Construction Sequence <br />18. Section D.3.2.1, Site Description of the Northern Waste Rock Disposal <br />Sites, specified that approximately 2 million tons, or approximately 1.3 <br />million cubic yards, of waste rock is proposed for disposal in the east pit. <br />With an estimated areal extent of approximately 20 acres, the east pit would <br />be filled with the planned waste rock disposal volumes to an approximate depth <br />of 42 feet. Upon reviewing Map J-1 and Figure C-2, it appears that the east <br />pit will approach depths of up to 200 feet. Please explain why more waste <br />rock form the west pit is not planned for disposal in the east pit. <br />Section D.5.1 Description of the Milling Process <br />Section D.5 Mill Facilities <br />19. Please specify mill facility design specifications regarding the <br />containment and or recovery of spilled or overflowed milling reagents, both in <br />the reagent storage area as well as the flotation, recirculation, and <br />processing areas, i.e. flooring materials, sump locations, material and height <br />of knee walls, etc. <br />20. Pregnant solutions from the leach pad pumped to the mill for processing <br />will require transmittal through a system that provides secondary <br />containment tions in the event of pipe failure, leaks, or damage. <br />Please commit to such. <br />21. What percentage of the tailing will be processed in the carbon-in-leach <br />circuit? <br />22. Will the flotation system also use cyanide as part of its processing <br />prior to disposal as tailing? <br />23. What is the textural analysis of the material processed through the <br />carbon-in-leach circuit? <br />24. The concentrates from the carbon-in-leach circuit should be rinsed to <br />reduce the level of free cyanide to .005 ppm as the Rito Seco is inhabited by <br />trout and the receiving stream standard for free cyanide is .005 ppm. <br />