2012-02-28_REVISION - M1980244 (77)

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ji3 SmiuTH gallons in size). Processed Ore Thickener: Processed High Grade Ore slurry from the Flotation System is pumped to the Processed Ore Thickener. The clear overflow from the thickener is sent to the Neutral pH Process Water Tank for reuse in the High Grade Mill facilities. The thickened underflow from this thickener is pumped to the Flotation Filter Feed Tank, which is approximately 33,000 gallons in size. High pH Thickener: 2.8. Filtration and Agglomeration Design Summary Squaw Gulch High Grade Mill Facilities 1/24/2012 Page 5 of 6 CIP processed High Grade Ore from the CIP System is pumped to the High pH Thickener. The clear overflow from the thickener is sent to the High pH Process Water Tank for reuse in the High Grade Mill facilities. The thickened underflow from this thickener is pumped to the CIP Filter Feed Tank. In order for the processed ore to be handled effectively and to ensure all recoverable water is recycled in the High Grade Mill facilities, additional water removal may be necessary. This is done in the Flotation Processed Ore Filters and the CIP Processed Ore Filters. After filtration, the processed ore will be agglomerated with cement and go through an agglomeration process at a rate of approximately 250 tons per hour where the material is agglomerated to a size of approximately 1 to 2 inches. The agglomeration process allow the processed ore to be handled in a non - dusting form and to enhance the leachability of the processed ore for further gold recovery once placed on either of the existing VLFs at the Cresson Project. From the Processed Ore Thickener, the thickener underflow slurry is pumped to the Flotation Filter Feed Tank. In the Flotation Filter Feed Tank, the slurry density is adjusted for optimal filtration performance and is pumped into two Flotation Processed Ore Filters. The Processed Ore Filter is a recessed plate pressure filter that will produce a filter cake of approximately 18% moisture. In like manner, the CIP Filter Feed Tank is fed thickened slurry from the High pH Thickener, the slurry density adjusted, and the resultant slurry fed to two CIP Processed Ore Filters. The filter cake from these filters will also be approximately 18% moisture. The filter cake from both filter systems are collected on belt feeders and conveyed to the Processed Ore Mixer which will mix the combined ore with cement. From the mixer, the ore /cement mixture is introduced into the Processed Ore Agglomerator. In the Agglomerator,