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Oxbow Mining, LLC Colorado Department of Public Health and Environment <br />Permit No. 98GU0812 - Air Pollution Control Division <br />Initial Approval — Modification 6 <br />8. Reclamation works and sequential extraction of material shall be initiated to keep the total disturbed <br />areas at any one time to a minimum. <br />APPENDIX A <br />AIRS <br />Description <br />Method of Control <br />Control Efficiency <br />Point <br />Ventilation Shaft #1 — 600,000 <br />None <br />0% <br />010 <br />CFM; Ventilation Shaft #2 — <br />800,000 CFM <br />011 <br />Stacking Tubes Transfer Points 8 <br />Partial Enclosure <br />85% <br />-10 <br />012 <br />Reclaim Tunnel Transfer Points <br />Partial Enclosure <br />85% <br />11-15 <br />013 <br />Screen Plant Transfer Points 16- <br />Partial Enclosure <br />85% <br />20 <br />Screen #1 (Kinergy model: <br />Full Enclosure <br />99% <br />XDSNED- 120 -HD; sn: KDSN- <br />014 <br />5860) <br />Screen #2 (Kinergy model: <br />XDSNED- 120 -HD; sn: KDSN- <br />5861 <br />015 <br />Dump Station Transfer Points <br />Partial Enclosure <br />85% <br />21 -24 <br />016 <br />Rock Loading <br />Water Spray <br />70% <br />017 <br />Crusher (McLanahan model: <br />Full Enclosure <br />99% <br />Super Quadroll; sn: 40 -83 <br />018 <br />Crusher transfer points 25 -26 <br />Partial Enclosure <br />85% <br />TP 27 & 29 <br />Partial <br />85% <br />Enclosure <br />019 <br />Crusher By -Pass to Train Loadout <br />TP 28 & 30 <br />Full <br />99% <br />Transfer Points 27 -31 <br />Enclosure <br />TP 31 <br />Full <br />93.8% <br />Enclosure <br />020 <br />Dracco Rock Dust Silo <br />Ba house <br />99% <br />021 <br />Stacking Tube Main Stockpile <br />Full Enclosure <br />99% <br />022 <br />Train Loadout <br />Full Enclosure <br />99% <br />024 <br />Coal Hauling <br />Fugitive Dust Control <br />25% <br />Plan <br />025 <br />Rock Hauling <br />Fugitive Dust Control <br />25% <br />Plan <br />026 <br />Rock Stockpile <br />Fugitive Dust Control <br />0% <br />Plan <br />027 <br />Dumping Area <br />Fugitive Dust Control <br />0% <br />Plan <br />028 <br />Bulldozing <br />Fugitive Dust Control <br />0% <br />Plan <br />030 <br />Waste rock crusher (Bradford <br />Partial Enclosure <br />85% <br />model: RMD; sn: 4377 <br />Screen #3 (Terex model: <br />Water Spray Bars ( No <br />75% <br />Powerscreen Chieftain 1800; sn: <br />engine controls ) <br />031 <br />12001900) powered by Diesel <br />Deutz engine (model: BF4M <br />2012C-6305-,.sn-,- 10130753 <br />051/0007/999 Page 13 <br />