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6.3.3 Exhibit C <br /> Milling Plan <br /> The GTM is a precious metal recovery mill that will process mine spoils from <br /> historic or recently closed mines. Mining will not occur at the mill site. Milling will <br /> commence upon completion of mill construction, approximately six months from <br /> Division approval. The mill will be constructed within the historic mine disturbance. <br /> The anticipated life of the mill is 10 years. <br /> Prior to receiving feedstock material, the feedstock material owner will enter <br /> into a contract with SGLLC (Appendix F). The contract will require that the owner of <br /> the feedstock material provide to SGLLC 1) an acid base account (ABA) test on the <br /> subject material, 2) documentation that a mining permit was issued by the Division <br /> for the mine site and 3) a Beneficial Use Determination from CO Department of <br /> Public Health and Environment (CDPHE) Hazardous Waste Management Division for <br /> the byproduct material generated from the feedstock. <br /> GTM consists of a crushing circuit, a concentrate recovery system and a <br /> recirculating process water system. The mill was designed to process 20 tons/hour <br /> or 200 tons per day. Approximately 1000 tons or five days' worth of feedstock will <br /> be stockpiled on a concrete pad near the feed hopper. A loader will feed the crusher, <br /> the beginning of the mill process. Two products will be exported from the site: <br /> byproduct materials that may be suitable for construction industry use and precious <br /> metal containing concentrate. The construction material, after passing through the <br /> dewatering screw, will be conveyed onto a concrete pad for stockpiling. The <br /> concentrate will be collected in 55-gallon drums and stored awaiting shipment to the <br /> refinery. <br /> The mill process starts at the crushing circuit that will include a jaw crusher or <br /> cone crusher that will size the feedstock to 1/2" minus. The '/2" minus will pass onto a <br /> water trough and conveyed to the ball mill and shaker table system. The <br /> concentrate will discharge into 55-gallon drum while the fines move on to a <br /> dewatering sand screw. The mill circuit flow diagram is provided herein. <br /> The water dependent processing component will be housed in a metal <br /> building. Beginning at the ball mill, the feedstock is fluidized with approximately 100 <br /> gpm at the ball mill. The fluidized feed stream is conveyed to three shaker tables <br /> requiring on 15 gpm per table or 45 gpm total. The shaker table byproduct will be <br /> dewatered and characterized for use as a construction material. The concentrate will <br /> be conveyed into 55-gallon drums. <br /> Significant disturbances to the land surface will not include pit excavations, <br /> mine benches, impoundments, or waste rock disposal areas. The feedstock and <br /> byproduct storage pads will be 30' x 40' and 30' x 30' respectively. Material storage <br /> bin figures are provided herein. The milling building will be 40' x 60'. The settling <br /> ponds for the recirculating process water system are 22' x 26'. The interior road will <br /> be 20' wide with roadside ditches and 18" culverts as the access points onto Stanley <br /> Road. <br /> The mill design includes a recirculating process water system. Approximately <br /> 145 gpm will be needed of which approximately 90% is recirculated. The balance of <br /> the water will be lost to the concentrate that will be contained in 55-gallon drums <br /> Page 5of21 <br />