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EXHIBIT K - Climate and Air Quality <br /> The essence of the changes in Exhibit K revolve around an up- <br /> dated dust control plan. The new plan was formulated under a <br /> consent agreement between the Colorado Mined Land Reclamation <br /> Board and the Climax Mine dated December 18, 1986. This agree- <br /> ment was due to a Board action against the mine for an incident <br /> of blowing tailing dust in September 1986. Under the agreement , <br /> a Dust Suppression Control Plan was submitted to the Board as a <br /> Technical Revision to the permit. The Board approved the plan on <br /> March 25, 1987. The same control plan had been approved by the <br /> Colorado Air Pollution Control Division (APCD) on October 30, <br /> 1986. The dust control plan in its entirety is on file with the <br /> MLRD, the APCD, and at the Climax Mine. The pertinent aspects <br /> of the plan are presented herein for cohesiveness. <br /> Climax Mine Dust Suppression Control Plan <br /> The Climax Mine can, at its discretion and depending upon eco- <br /> nomics at a given time , produce molybdenum disulfide from <br /> molybdenite ore from the open pit mine. Production rates may <br /> vary ( again depending on economics ) as discussed in Exhibit D. <br /> • After milling, processing, and the removal of the product, the <br /> remaining rock material or tailing is transported in a water <br /> slurry via tailing delivery pipelines to the tailing ponds north <br /> of the mine site. The tailing sands settle out on the surface <br /> of the tailing ponds, and the water is decanted and pumped back <br /> to the mill . Tailing from the Climax operation is composed <br /> predominately of silica. Analyses of the tailing indicate the <br /> absence of hazardous materials in toxic quantities. <br /> The Climax Mine historically has been supported by three main <br /> tailing deposition areas. All will be used in the future. The <br /> newest and farthest downstream on Tenmile Creek (toward Copper <br /> Mountain) is the Mayflower pond, followed upstream by the Ten- <br /> mile pond, and lastly the Robinson pond. Presently, the May- <br /> flower pond is being utilized as a water treatment system with <br /> no active deposition of tailing; the Tenmile pond is the active <br /> tailing deposition pond. The Robinson pond presently is <br /> inactive as a deposition area but contains additional capacity <br /> and may be reactivated. <br /> K-1 <br /> • <br />