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• ATTACHMENT 1 • <br />BATTLE MOUNTAIN RESOURCES, SAN LUIS PROJECT <br />CMLRD ADEQUACY LETTER RESPONSES <br />Page 2 of 28 <br />3. The emergency response plan identified 6,500 gallonslof sulfuric acid <br />as being located on site. At expected production 1erels, what is the <br />daily requirement or consumption of sulfuric acid? N~'1l sulfuric acid <br />be used as a detoxifying reagent in an emergency spill situation? <br />RESPONSE: The sulfuric acid consumption levels are estimated at 1.2 lbs per <br />ton of ore processed. This consumption will vary wi h the variations <br />in ore type. At the expected rate of 4,680 tons der 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 treatmentlof 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 (see response <br />to question 4). <br />Hydrogen peroxide and alkaline chlorination are referenced for use <br />in the emergency response plan for cyanide deto ification. Mhat <br />reagent will be used for a)ka)ine chlorination? Mith reference to <br />Table 4.1 in the emergency response plan (Exhibit l~), what volumes <br />of reagents will be availab]e for detoxificationipurposes? Mhat <br />corresponding volumes of spills will be deioxifieo1 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 (1 ton). This quantity should be sufficient <br />to detoxify any spill that could possibly occur an as discussed <br />in the response to question 5, any spill would be completely <br />contained within the facility. The volume of spill o be detoxified <br />will vary depending on the point in the process here the spill <br />occurs and the characteristics of the ore under lea h. <br />5. Please provide the mill facility design criteria to monstrate that <br />any solution or chemical spi 11 would not discharge fr m the foci 1 ity. <br />Floor construction, internal curbing, solution toile ti on and backup <br />system design specifications should be submitted. <br />RESPONSE: Attachment 2 is included to provide preliminary deli n criteria for <br />the mill facility internal curbing. Final designs wi~l be submitted <br />prior to construction. <br />