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Oxbow Mining, LLC Colorado Department of Public Health and Environment <br />Permit No. 98GUO812 - Air Pollution Control Division <br />Initial Approval — Modification 6 <br />Process /Consumption Limits Continued <br />AIRS <br />Point <br />process Parameter <br />Annual Limit <br />Daily Limit <br />Controls <br />024 <br />Crusher (McLanahan model: <br />4,450.000 <br />tons of coal <br />26,000 tons of <br />Fugitive Dust <br />017 <br />Super Quadroll; sn: 40 -83) <br />all transfers <br />coal all transfers <br />Full Enclosure <br />025 <br />Rock Hauling <br />combined <br />combined <br />Fugitive dust <br />4,450,000 <br />26,000 tons of <br />Control Plan <br />018 <br />Crusher transfer points 25 -26 <br />tons of coal <br />coal all transfers <br />Partial Enclosure <br />all transfers <br />combined <br />Control Plan <br />028 <br />_ <br />combined <br />48.0 hours per <br />None <br />7,000,000 <br />day <br />019 <br />Crusher By -Pass to Train <br />tons of coal <br />40,000 tons of <br />Loadout Transfer Points 27 -31 <br />all transfers <br />coal all transfers <br />Partial Enclosure <br />combined <br />combined <br />020 <br />Two (2) Dracco Rock Dust Silo <br />20.000 tons <br />486 tons of Rock <br />_ <br />Bag house <br />Ba house <br />of Rock Dust <br />Dust <br />Stacking Tube Main Stockpile <br />7,000,000 <br />40,000 tons of <br />Partial Enclosure <br />tons of coal <br />coal <br />022 <br />Train Loadout <br />7,000,000 <br />40,000 tons of <br />Partial Enclosure <br />tons of coal <br />coal <br />030 <br />Waste rock crusher (Bradford <br />450,000 tons <br />2,400 tons <br />Partial Enclosure <br />model: RMD; sn: 4377 ) <br />Screen #3 (Terex model: <br />912,500 tons <br />2,500 tons of <br />031 <br />Powerscreen Chieftain 1800; sn: <br />of coal and <br />coal and waste <br />Water Spray <br />12001900 <br />waste rock <br />rock <br />Bars <br />031 screen powered by Diesel <br />031 <br />Deutz engine (model: BF4M <br />2,600 hours <br />10 hours per day <br />None <br />2012C -6305; sn: 10130753 <br />per year <br />Fugitive Emissions Activities <br />AIRS <br />Point <br />process Parameter <br />Annual Limit <br />Daily Limit <br />Controls <br />024 <br />Coal Hauling <br />600,000 tons <br />2,000 tons of <br />Fugitive Dust <br />of coal <br />coal <br />Control Plan <br />025 <br />Rock Hauling <br />100,000 tons <br />274 tons <br />Fugitive dust <br />Control Plan <br />026 & <br />27 <br />Rock Stockpile /Dumping Area <br />1.98 acres <br />Fugitive dust <br />Control Plan <br />028 <br />Bulldozing <br />17,520 hours <br />48.0 hours per <br />None <br />er ear <br />day <br />Compliance with the yearly process limits shall be determined on a rolling twelve (12) month total. <br />By the end of each month a new twelve -month total is calculated based on the previous twelve <br />months' data. The permit holder shall calculate monthly process rate and keep a compliance <br />record on site or at a local field office with site responsibility, for Division review. <br />STATE AND FEDERAL REGULATORY REQUIREMENTS <br />Visible emissions shall not exceed twenty percent (20 %) opacity during normal operation of the <br />source. During periods of startup, process modification, or adjustment of control equipment <br />051/0007/999 Page 4 <br />