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likely travel paths of least resistance into underlying mine features which capture, pump and <br />release water via the permitted point discharge (CDPS permit). From this perspective, all <br />aspects of the subgrade repository are 'captured' and the life cycle of both the subgrade solids <br />and leachate remain in the system and are accounted for thereby not creating an imbalance to <br />the hydrologic cycle. Further discussion was provided within the groundwater assessment above <br />and in Section 2. <br />m) Processing On-Site = Refer to Figure C.1 and Section 2 below which describe the proposed <br />milling efforts. <br />n) Primary commodities to be mined/extracted = Gold and Silver. <br />o) Explosives use and demonstration that off site areas will not be adversely affected = Not <br />applicable. There are no off site areas/features that could be affected by the use of explosives <br />at the Ruby Trust. <br />2. Tailings and Milling Plan <br />a) Plant Facilities: The plant facility is strictly comprised of gravity separation components which <br />physically break down the mined materials into lesser size. There is NO chemical extraction <br />method associated with the plant. The components to the milling process are shown within <br />Figure C.1. There are five possible steps within the process where metals can be recovered. <br />There are also recirculation steps in order to bring the material down to suitable size and to <br />aggressively extract as much metal as possible. The anticipated recover rate is between 70 - 90 <br />%. The proposed milling contains the following components to be housed outside on the <br />surface: law crusher + Secondary Impact/Cone Crusher. The materials will be transported to the <br />adjacent underground mill features via a conveyor belt. The underground milling features <br />include a ball mill 4 jig, 4 heads tank -pumped to 4 cyclone where it is separated by size. The <br />undersized proceeds on, and the oversized is re-circulated to the ball mill. From the cyclone <br />appropriately sized materials proceed to a Falcon bowl (where concentrate is pulled off), the <br />Falcon discharge proceeds to two shaker tables. Concentrate from the shaker tables is <br />collected. The Shaker table discharge proceeds to the sluice box and finally a concentrating <br />Nelson bowl. Metals can be extracted via gravity from the jig, Falcon bowl, shaker tables, sluice <br />box, and concentrating Nelson bowl. The ball mill requires water which is supplied from <br />underground workings or the proposed subgrade repository. The products from the milling <br />include economic ore and subgrade (uneconomic) ore. The economic ore will be transported <br />offsite for further processing. The subgrade ore will be housed within the proposed repository <br />until such time an economic processing method can be identified. <br />The milling components to be placed at the surface will be housed under a snow-shed roof to be <br />built in 2010. The shed roof will be built at a similar pitch to the angle of the hill slope above the <br />high-wall. This will effectively shed snow over the surface milling features and keep these <br />10