2009-01-08_REVISION - M1981165 (4)

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Mine Dev. Inc. Neglected Mine Project 3319 E 4"'. Av. Durango, Co. 81301 Ref. Technical revision (TR-3) permit # (M-1981-165): Handling of Chemicals and any spills. Dear Bob, In response to your question pertaining to the handling of any spills of chemicals or solutions, please note (see drawings), that the area where the leaching will be preformed will be lined and on a totally contained pad draining to the sump. The over lament of road base which will consist of a mixture of washed sand and %Z inch (-) round rock cobble containing no sharp edged rock. This compacted material was chosen because of it's ability to absorb any of these chemicals (wet or dry) if spilled and thus reducing the chance of dust also in using this material clean up of dry spills can be accomplished with shovels and brooms and the material can then be placed into the leach batch and run through the leaching process. In the event of a spill of the leach solution, the solution can be further diluted with fresh water and collected in the sump and pumped back to the leach system. Testing of the effected over lament can be accomplished with the use of the testing instruments used to test the leach batch and any contaminated base material can be placed into the leach circuit. The chemicals in storage will be stored on their approved spill pallets and the pallets will be on a piece of pond liner, formed into a containment tub to allow for quick clean up with a shovel and broom, all will be kept in a cool dry environment, and stored in accordance with the recommendations listed on the MSDS sheets. Supplies of dolomite and lime will be stored on site to be used in any major clean up problems. Potassium Monopersulfate compound will be stored separate from other chemicals due to it's reactivity to combustibles. This compound will be stored in the existing mill building on the concrete floor, on a piece of pond liner formed into a tub and on its approved spill pallet. This area will allow maximum ventilation and a cool environment. Chemical can be neutralized with a dilute solution of sodium carbonate or a dilute solution of sodium hydroxide, applied until a neutral PH is achieved and then area is flushed with water. Sodium Borohydride, this chemical can be stored in a cool dry area away from water. Clean up can be done with shovel and broom and dry dolomite powder to keep dust down, then area can be washed with water to dilute to neutral PH. Sodium Bromide, storage of this chemical can be "general storage" as noted in the MSDS sheets. Storage is in a cool dry environment. The neutralization of this chemical is accomplished with a dilute mixture of sodium hydroxide and when neutral PH has been achieved area is then washed down with water.