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5. Designated Chemical Evaluation <br />The full list of chemicals to be used in the underground mill for ore processing is shown in Section <br />1.3 of this Exhibit. Of these chemicals, the following chemicals are considered to be designated <br />chemicals (i.e., toxic or acidic): <br />1. Calcium Oxide (CaO) -.01 lb /ton 100% powder <br />2. Sodium Hydroxide (NaOH) -very limited and near 0 use 50% solution <br />3. Sodium Hydrogen Sulfide (NaSH) -1 lb /ton 100% granular <br />4. Sodium Bisulfate (NaHSO4H2O) 1 lb /ton 100% granular <br />5. Copper Sulfate (CuSO4) .01 lb /ton 100% granular <br />As described earlier, these chemicals will be brought to the site by highway truck and will be <br />rapidly loaded on a forklift or Bobcat for transportation to the mill tunnel underground. No more <br />than 1 ton of each chemical will be stored in the tunnel at any given time. Some chemicals will be <br />substantially less. They will be stored underground in their factory containers and will be used as <br />needed in the mill process. The description of the mill tunnel inclines, lined sump for spills, is <br />described in Section 1.3 of this Exhibit. With these controls implemented, it will be virtually <br />impossible for a chemical to escape into the environment. <br />The only chemical that is designated in liquid form is the 50% sodium hydroxide solution, and no <br />more than 100 gallons of this solution will be present on site at any time. This solution is highly <br />alkaline. It will be stored in the factory heavy duty plastic container. If a spill of this liquid or any <br />other liquid occurs, the liquid will make its way to the lined sump of 3000 gallon capacity. <br />The sodium hydrogen sulfide must be mixed with water that is alkaline, above pH 9. This will be <br />achieved using the calcium oxide or sodium hydroxide in the list of chemicals. <br />Magnesium chloride or a similar non - hazardous chemical will be used to treat haul roads within the <br />mine, the waste pile area and the portion of County Road 26 that is needed to access the Atlas Pile <br />area. The chemical will be added in a dilute solution to the road surface where it will bind with the <br />road material. The hard surface created by this treatment will minimize the amount of fugitive dust <br />generated by mine haulage activities. The road treatment solution will be stored in a tank near the <br />Revenue Mine August 2012 T - <br />