2009-06-08_REVISION - M1997032 (21)

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Section 1 117&O0ucI1o17 Uranium is developed or ea conventional underground operation may seek an exen accordance with Section 34 scted, either by in-situ leach mining or by open mining techniques. A uranium mining ion from designated mining operation status in -112.5(2). Classification of the Van 4 Mine as a DMO provides for preparation of an Environmental Protection Plan f or the mines, which will describe how Denison will facilitate compliance with the Colorado Mined Lands Reclamation Act and associated rules in order to protect areas th It have the potential to be affected by designated chemicals or acid- or toxic-formi: g materials. Section 34-32-112.5(2) provides for exemption of a mine from DMO tatus if: ...an operator demonstrates to the board at the time of applying for a permit or at a subsequent hearing that toxic or acid chemicals are not stored or used on-site and that acid- or to disturbed in quantities suf or the environment... Therefore, complying with the C associated rules requires an and and acid- or toxic-forming mate: ¦ Designated chemicals are def chemicals used within the pe Designated chemicals are not metallurgical processing will Utah. Therefore, designated < Pducing materials will not be used, stored, or to adversely affect any person, any property, Mined Lands Reclamation Act and ending of the potential for designated chemicals to be present at the mine site. ned at HRMMR 1.1(14) to include toxic or acidic mit area in extractive metallurgical processing. present at the Van 4 Mine because all extractive be completed at the Denison mill near Blanding, do not require additional evaluation. ¦ Acid-forming materials may e exposed at a mining operation if sulfide minerals such as pyrite are present in mine development rock or ore. The potential presence of acid-forming ma erials at the Van 4 Mine is examined in this investigation. ¦ Toxic-forming materials may, deposits are naturally occurs may also be naturally enrichi and these materials may be e The potential presence of tox potential for migration of the investigation. Colorado regulations at HRMMI facilities that require specific eva acid- or toxic-forming materials.. relation to actual facilities preser >o be exposed by a mining operation. Mineral enrichments of metals. Potentially toxic metals in the rock in association with the ore minerals, osed to the environment by the mining process. forming materials in the mine rock and the materials into the environment is examined in this §6.4.20(1)(c) set forth the various types of mine nation for the presence of designated chemicals and xhibit 1-1 summarizes these specified facilities in at the Van 4 Mine. 1-2 9 • T:\6496&Denwn Mines\Te