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1 <br /> BATTLE MOUNTAIN RESOURCES, SAN LUIS PROJECT <br /> CMLRD ADEQUACY LETTER RESPONSES <br /> Page 2 of 28 <br /> <br /> 3. The emergency response plan identified 6,500 gallons of sulfuric acid <br /> as being located on site. At expected production levels, what is the <br /> daily requirement or consumption of sulfuric acid? Wi11 sulfuric acid <br /> be used as a detoxifying reagent in an emergency spill situation? <br /> RESPON SE: The sulfuric acid consumption levels are estimated at 1.2 lbs per <br /> ton of ore processed. This consumption will vary with the variations <br /> in ore type. At the expected rate of 4,680 tons per day (TPD) of <br /> tailings production, this would be 2.8 TPD. As mentioned on page D- <br />' 16, the sulfuric acid will be used in the treatment of the tailings <br /> slurry prior to tailings disposal. The sulfuric acid will not be used <br /> as a detoxifying agent in an emergency spill situation (.tiee response <br />' to question 4). <br /> 4. Hydrogen peroxide and alkaline chlorination are referenced for use <br /> in the emergency response plan for cyanide detoxification. What <br />' reagent will be used for alkaline chlorination? With reference to <br /> Table 4.1 in the emergency response plan (Exhibit M), what volumes <br /> of reagents will be available for detoxification purposes? What <br />corresponding volumes of spills will be detoxified by the amounts <br /> of reagents stored on site? <br />RESPONSE: The reagent used for alkaline chlorination will be calcium <br />hypochlorite. The volume of calcium hypochlorite stored onsite is <br />expected to be 2,000 lbs (I ton). This quantity should be sufficient <br />' to detoxify any spill that could possibly occur and, as discussed <br />in the response to question 5, any spill would be completely <br />contained within the facility. The volume of spill to be detoxified <br />will vary depending on the point in the process where the spill <br />' occurs and the characteristics of the ore under leach. <br />5. 1 r`~ P)ease provide the mill facility design criteria to demonstrate that <br />~~ any solution or chemical spi]1 would not discharge from the facility. <br />Floor construction, internal curbing, solution collection and backup <br />system design specifications should be submitted. <br />RESPONSE: Attachment 2 is included to provide preliminary design criteria for <br />the mill facility internal curbing. Final designs will be submitted <br />prior to construction. <br />1 <br />1 <br /> <br /> <br />