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-;M� <br /> DLRAY SILVER MINES <br /> Response: <br /> a. All tables that contain reagent information have been updated to include alternatives. <br /> b. The additional SDS information supplied to the Division in Adequacy Response#2 are alternative <br /> chemicals for the listed reagents. Danafloat can be used instead of Areofloat, Polyfroth can be <br /> used instead of Oreprep, and NAX 31 is a Sodium Isopropyl Xanthate. Other alternate venders <br /> without SDS sheets included in the Table 4 submitted in Adequacy Response #2 have been <br /> removed from the table. Danafloat,Aeeofloat, and NAX 31 are the only alternative chemicals the <br /> mine requests to be reviewed at this time. <br /> 4. Nax 31 by Prospec Chemicals appears to be an alternative Sodium Isopropyl Xanthate. Please <br /> confirm if this is an alternative requesting to be used. <br /> Response: Correct, NAX 31 is an alternative Sodium Isopropyl Xanthate. Table 4 has been updated with <br /> relevant information on NAX 31. <br /> 5. Danafloat 067 by Quadra Chemicals Inc. appears to be a new chemical rather than an <br /> alternative based on the provided MSDS section 3. Composition/information of ingredients.Please <br /> clarify; <br /> a. What this chemical is used is for/purpose; <br /> b. Where it will be stored within the reagent room; <br /> c. Indicate if it will be replacing another chemical or if additional tanks are needed, <br /> d. The maximum volume to be stored on site at any given time; <br /> e. Its known potential to affect human health, property or the environment, pursuant to Rule <br /> 6.4.21(5)(a); <br /> f. The expected concentrations, process solution volumes and fate of designated chemicals, <br /> in accordance with Rule 6.4.21(5)(b). <br /> Response: <br /> a. Danafloat is an alternative to Aerofloat and serves the same purpose. <br /> b. If used it will be stored in the common area of the reagent room at the location labeled as Aero <br /> 242 on drawing 700-GA-001. <br /> c. No additional tanks are needed. This would replace the Aerofloat as an alternative chemical and <br /> would be used in the same tanks. <br /> d. The volume stored would be the same as Aerofloat. Please see Updated Table 1. <br /> e. The known potential to affect human health and the environment are listed in Table 4. <br /> f. The concentrations,process solution volumes, and fate are the same as Aerofloat 242. <br /> 6. Polyfroth W20 by Quadra Chemicals Inc. appears to be a new chemical rather than an alternative <br /> based on the provided MSDS section 3. Composition/information of ingredients. Please clarify; <br /> a. What this chemical is used is for/purpose; <br /> b. Where it will be stored within the reagent room; <br /> c. Indicate if it will be replacing another chemical or if additional tanks are needed, <br /> d. The maximum volume to be stored on site at any given time; <br /> 2 1 P a g e <br />