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9q Climax Molybdenum,---," Henderson Operations <br />19302 County Rd. 3 <br />Parshall, CO 80468 <br />April 22, 2008 303.569.3221 Tel <br />Certified Mail: 7006 2150 0001 8831 5607 970.725.3267 Fax <br />Allen Sorenson ?a, -7 7 It 17 RECEWED <br />State of Colorado APR 2 5 200 <br />Division of Reclamation, Mining & Safety / 2 - (? `'? ?/ <br />1313 Sherman St., Rm. 215 Division of Reclamation, <br />Denver, CO 80203 Mining and Safety <br />RE: Designated Chemical Use & Storage Acceptance Request <br />Mr. Sorenson: <br />Please review and accept the full-time use of Orfom D8 Depressant as a designated chemical to <br />be used in the Henderson Mill process circuit along with its associated containment and feed <br />platform that will serve as a new Environmental Protection Facility under Henderson's <br />Environmental Protection Plan. This chemical has undergone appropriate testing and has been <br />found to be an excellent iron depressing solution. <br />Also included with this letter is a copy of the MSDS for this material and a set of engineered <br />drawings for the storage platform on the existing reagent deck at the mill facility. The <br />arrangement will consist of appropriately contained platforms to place manufacturer supplied <br />totes (not to exceed 285 gallons each), which will independently feed into 100 gallon head tanks. <br />The head tanks will then deliver the chemical to the process. In total, two separate head tanks <br />will be constructed, one for D8 and one for our existing frother agent. The entire facility will be <br />contained within the Henderson Mill building. <br />This project will effectively contain and deliver the aforementioned chemicals to our process. <br />Following your acceptance, and the completion of installation of this facility, a certification will <br />be provided by a P.E., certifying that the system was constructed in accordance with the <br />engineered drawings. <br />If you have any additional questions regarding the addition of this chemical and its appurtenant <br />structures, please feel free to contact me at 303-569-3221 x2284. <br />Best Regards, <br />Tim Haynes <br />Environmental Engineer <br />Henderson Mill <br />19302 CR 3 <br />Parshall, CO 80468 <br />Eric: MSDS (Orfom D8 Depressant), Engineered Dwgs (Iron Depressant Dosing System)