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Designated Mining Operation Environmental Protection Plan Summary Reference Document (1) As specified in a letter from the Division of Minerals and Geology (DMG) dated April 18, 1999, regarding Adequacy of the Application, Yankee Gulch Project, File No. M-99-002, the DMG has determined that the Yankee Gulch Sodium Minerals Project (Yankee Gulch Project) is a Designated Mining Operation (DMO). As a DMO, American Soda, L.L.P. (American Soda) is required under Rule 6.4.20 to complete an Environmental Protection Plan (EPP). The basis for this determination, as stated in the letter, is found in Rule 1.1(14)(b), which states that mining operations will be designated if "toxic or acid-forming materials will be exposed or disturbed as a result of mining operations." Therefore, responses in this EPP Summary Reference Document have been limited to those items that relate to "toxic or acid-forming materials" only. In responding to these items, American Soda will ensure compliance with the provisions of the Act and Rules in order to protect all areas that have the potential to be affected by toxic oracid-forming materials. A Preliminary Response Plan has been submitted as a technical revision to the Colorado Mined Land Reclamation Board Regular Operation (112) Reclamation Permit Application (112 Permit Application) by letter dated April 23, 1999. Measures recommended by the Colorado Division of Wildlife (CDOW) for the protection of wildlife are included in a Wildlife Mitigation Plan, which has been submitted as a technical revision to the 112 Permit Application by letter dated April 16, 1999. (2) Maps showing locations where toxic or acid-forming materials may be found at the Piceance Site arc located in the 112 Permit Application, Exhibit D, Figure D-2 Figure D-3, and Figure D-4. (3) The following information in Table 1 identifies other agencies' environmental protection measures and monitoring programs and the requirements that have promulgated these measures. Environmental protection measures and monitoring, as they apply to toxic or acid-forming materials, would include procedures invoked to prevent, detect, or mitigate a release of those materials from an Environmental Protection Facility (EPF). The analysis of these measures and requirements has been based on this understanding. At this time, most permits referenced in Table 1 have not been finalized, and, therefore, the environmental protection measures and monitoring requirements recommended by these permits are tentative until final determinations have been made by the administering agencies. A-1