2019-05-03_PERMIT FILE - C1981038A (4)

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2.05.6 Mitigation of Surface Coal Mining Operation Impacts. In 2010, as part of PR-4, Bowie No. 1 will transfer 2,379 acres from their permit boundary to the Bowie No. 2 mine. In addition, Bowie No. 1 agrees that a portion of three Federal Coal Leases will be transferred to the Bowie No.2 Mine. This additional permit area and the Federal Coal Leases will be incorporated into the Bowie No. 2 permit, and will encompass some of the old workings developed from the Bowie No. 1 mine. The Bowie No. 2 Mine has agreed to assume any and all of the liability associated with the old workings that are encompassed by the Bowie No. 2 Mine permit boundary. Therefore, some portions of section 2.05.6 are no longer applicable as the liability has been transferred to the Bowie No.2 permit. (1) (a) See the Air Quality Appendix in Volume 9 for copies of the Emissions Permits. All of the emission permits have been cancelled but the permits are retained in Volume 9 for the sake of continuity. (b)Air Quality Monitoring At the Orchard Valley Mine, Colorado Westmoreland Inc. had two monitoring sites for high- volume particulate samplers (hi-vol). One of the stations was located near the mine haul road and the other was near the silo area (see Map 8A-8). Air samples were taken at these hi-vols every fourth day, per the Colorado Department of Health, Air Quality Control Division sampling schedule. CWI received summaries of fugitive dust quantities from this data which was compiled by Air Sciences, Inc. of Lakewood, Colorado and formerly by Marlatt and Associates of Fort Collins, Colorado. These reports are presented in the Climatology-High Volume Sampling Appendix in Volume 9, and are on file in the CWI office in Paonia, Colorado. As the monitoring data has consistently shown compliance with ambient air quality standards, the Colorado Department of Health, Air Quality Control Division, approved CWJ's request to discontinue the high-volume particulate sampling. See the Department of Health correspondence in the Air Quality Appendix, Volume 9. Up until 1979, CWI maintained a weather station in order to develop important baseline data. This station was located at the railroad wye southeast of the train loadout facilities and recorded temperature, wind speed, and direction. CWI received summaries of weather data compiled by Marlatt&Associates. Colorado Westmoreland Inc.'s Air Pollution measures for fugitive dust control are in compliance with 2.05.6(1). Mitigation measures for minimizing the impact of the mining and coal loading on the air quality are directed in four areas keeping all coal inside a controlled environment from the mine to the train, rapid reclamation of disturbed areas, general cleanliness of the mine operation, and if stockpiling of coal is necessary, implementation of special air control measures. MR-133 2.05-84 04/14 ,jVroyed