2018-01-31_PERMIT FILE - C2009087 (19)

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Peabody Sage Creek Mining LLC Permit No. 1OR01175 Initial Approval -Modification 1 page 3 Colorado Department of Public Health and Environment Air Pollution Control Division Mined coal production shall not exceed 10,000 tons per day and 2,000,000 tons per year. Mined coal stockpiles shall not exceed 380,000 tons. Coal transfer and crushing for quality control shall not exceed 3,120 tons per day and 26,000 tons per year. 10. This source shall be limited to a maximum waste rock production rate as listed below and all other activities, operational rates and numbers of equipment as stated in the application. Annual records of the actual production rates shall be maintained by the applicant and made available to the Division for inspection upon request. (Reference: Regulation No. 3, Part B, Section II.A.4.) Waste rock production shall not exceed 10,000 tons per day and 100,000 tons per year. Waste rock will be hauled off-site, or on-site stockpiles shall not exceed 57 acres. STATE AND FEDERAL REGULATORY REQUIREMENTS 11. Visible emissions shall not exceed twenty percent (20%) opacity during normal operation of the source. During periods of startup, process modification, or adjustment of control equipment visible emissions shall not exceed 30% opacity for more than six minutes in any sixty consecutive minutes. (Reference: Regulation No. 1, Section II.A.1. &4.) 12. This source is subject to the odor requirements of Regulation No. 2. (State only enforceable) 13 This source is subject to the New Source Performance Standards requirements of Regulation No. 6, Part A, Subpart Y , Standards of Performance for Coal Preparation Plants including, but not limited to, the following: § 60.254 Standards for coal processing and conveying equipment, coal storage systems, transfer and loading systems, and open storage piles. The discharge into the atmosphere shall not exhibit 20 percent opacity or greater. This applies to emissions from coal processing and conveying equipment, coal storage systems, and coal transfer and loading systems. In addition, the following requirements of Regulation No. 6, Part A, Subpart A, General Provisions, apply. a. At all times, including periods of start-up, shutdown, and malfunction, the facility and control equipment shall, to the extent practicable, be maintained and operated in a manner consistent with good air pollution control practices for minimizing emissions. Determination of whether or not acceptable operating and maintenance procedures are being used will be based on information available to the Division, which may include, but is not limited to, monitoring results, opacity observations, review of operating and maintenance procedures, and inspection of the source (Reference: Regulation 6, Part A. General Provisions from 40CFR60.11 AIRS ID: 107/0098 Page 3 of 11