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6.4.21 Exhibit U <br /> Designated Mining Operation Environmental Protection Plan <br /> 6.4.21 Summary <br /> The purpose of this Environmental Protection Plan (EPP) is to assure <br /> compliance with the Act and Rules that are protective of environmental areas that <br /> have the potential to be affected by designated chemicals, toxic or acid-forming <br /> materials or acid mine drainage. In addition, the EPP includes implementation and <br /> commitment to appropriate wildlife protective measures recommended by CPW. <br /> [6.4.21(1)(c)] The EPP <br /> GTM does not include leach facilities, heap leach pads, tailings storage, <br /> tailings disposal areas, impoundments, or land application site. No designated <br /> chemicals will be used in milling. Toxic and/or acid forming materials may be <br /> feedstock material and/or byproduct material. In this case, the material will be <br /> appropriately handled as dictated by its characterization and contained to prevent <br /> exposure to weather and prevent stormwater runoff. <br /> GTM's objective is to process mine spoils from legacy mine sites. This <br /> feedstock will be temporarily stockpiled near the feed hopper on a concrete pad with <br /> a sloping floor that will contain any runoff from precipitation or snow melt. <br /> Precipitation collected within the storage bins will evaporate within 72 hours of <br /> accumulation. Approximately one week's feedstock volume or 1000 tons will be <br /> stored on site at any one time. Post mill byproducts will be stored in a three-sided <br /> storage bin with a concrete floor awaiting transport to the end user. Construction <br /> detail is provided in Exhibit E. <br /> [6.4.21(2)] Maps <br /> Exhibits A and E include site development and mill figures. <br /> [6.4.21(3)] Identification of Jurisdictional Agencies <br /> Colorado Department of Public Health and Environment (CDPHE)'s Water <br /> Quality Control Division (WQCD) and Air Pollution Control Division (APCD) will require <br /> permits. <br /> Colorado Department of Transportation issued an access permit. <br /> Clear Creek County Department of Planning and Zoning will require a zone <br /> change in the event the property owner chooses to sell the property as a commercial <br /> or industrial site. <br /> [6.4.21(4)(a and b)] Other Permits and Licenses <br /> WQCD will require a stormwater discharge permit. The applicant provided the <br /> permit in Appendix B. <br /> APCD will require an Air Pollution Emission Notice (APEN) for the crusher and <br /> screen. because <br /> CDOT's access permit is provided in Appendix C. <br /> [6.4.21(5)] Designated Chemical Evaluation <br /> Page 16 of 23 <br />