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inch size to ensure that proper compaction can be achieved with the mixture. Also, no mixture to be <br />placed can have more than 20% waste rock, also to ensure that proper compaction can be achieved. <br />If a large portion of existing waste rock is left at the Revenue Pile as a base for the subsequent <br />tailings, it will be graded flat and the surface will be compacted. The slope stability analysis of this <br />scenario is addressed in Exhibit U. <br />1.4 Chemical Storage and Use on Site <br />In addition to the 4200 gallon diesel tank stored on the surface, various chemicals will be stored on <br />site for use in the milling operation. As shown on Maps C -2, C -3 and C -4, the mill will be entirely <br />underground. The two main mill tunnels will be graded at a minimum of 1% so that they both drain <br />to a central sump, so that no spills or leaks can leave the mill area. This central sump will have a <br />capacity of 3000 gallons, which is far more than any of the tanks that will be stored in the mill area. <br />This is shown on Map C -2. <br />The chemical list for the mill operation is enclosed below. All chemicals are listed in the estimated <br />amount used per ton of ore processed. <br />1. Zinc Sulfate (ZnSO4) -1 lb/ton 100% crystalline <br />2. Sodium Carbonate (Na2CO3) -1 lb/ton 100% granular <br />3. Calcium Oxide (CaO) -.01 Ib /ton 100% powder <br />4. Sodium Ethyl Xanthate (NaEX) -.05 lb/ton <br />5. Pottasium Amyl Xanthate (PAX) -.05 lb/ton 100% powder <br />6. Promotor A- 3477 -.03 lb/ton 100% liquid <br />7. Promotor A- 242 -.01 lb/ton 100% liquid <br />8. Corn Starch -.07 lb/ton 100% powder <br />9. Sodium Hydroxide (NaOH) -very limited and near 0 use 50% solution <br />10. Sodium Hydrogen Sulfide (NaSH) -1 lb/ton 100% granular <br />11. Anionic Emulsion Flocculent AE 852 [all thickeners] -.1 lb/ton 100% fine powder <br />12. Frother [MIBC] -.01 lb/ton 100% liquid <br />13. Sodium MetaBisulfate (NaHSO 100% granular <br />14. Copper Sulfate (CuSO4) .01 lb/ton 100% granular <br />15. Dowfroth 250 Frother 100% Liquid <br />16. Sodium Amyl Xanthate (NaX) -.05 lb/ton 100% powder <br />17. Calcium hydroxide - CaOH <br />18. Di- thiophosphinate & Trithiophosphinate <br />19. Ethyl isopropyl thiocarbamate flotation reagent <br />Revenue Mine August 2012 T - <br />