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2012 Air Pollution Inspection <br />0510015-INSP-2012.docx Page 9 of 30 <br />point/activity is not currently in operation, but it is possible that they may <br />utilize this activity again in the future. <br />Coal Mine Ventilation Shafts: <br />Sylvester Gulch: Joy model 120-65-880, 1500 hp (exhaust) <br />Shaft #1 — fan #1: TLT Babcock model GAF 30-15-1, 2500 hp (intake) <br />Shaft #2 — fan #1: TLT Babcock model GAF 30-15-1, 2500 hp (intake) <br />019 <br />09GU1382 <br />Shaft #2 — fan #2: TLT Babcock model GAF 30-15-1, 2500 hp (intake) <br />Shaft #3 — fan #1: Joy model MF -65, 1500 hp (intake — not currently <br />operated) <br />Ventilation fans are uncontrolled. Shaft #2 fans are restricted to one (1) <br />fanoperating at any time. <br />Coal Prep Plant Process Equipment: <br />One (1) Conn -Weld, 8X16 Negative Slope, vibrating screen with SN: <br />10 100 14, rated at 800 tph. <br />One (1) Crusher- MMD Group of Companies Series 500 (scalping station) <br />with SN: S1541058 <br />Screen #1: Bivitech, KRL/DD "B" 2400X90x, SN: 2418 & 2419 <br />020 <br />09GU1382 <br />Screen #2-(2) Conn -Weld 8X16 Horizontal, SN: H1010008 & H1010009 <br />Screen #3: Conn -Weld, 12X20 Horizontal DD, SN: H1010010 <br />Screen #4: Conn -Weld, 8X16 Horizontal, SN: H1010011 <br />Screen #5: Conn -Weld, 4X10 Negative Slope, SN: D1010012 <br />Screen #6: Conn -Weld, 4X10 Negative Slope, SN: D1010013 <br />Crusher: McClanahan Black Diamond Crusher, SN: 20102003 <br />All processes are enclosed. All processes in line after the Series 500 <br />Crusher are considered 'Wet' processes and are APEN exempt. <br />One (1) Cummins, Model QSK60-G9, S/N: 33167177, diesel fueled, <br />reciprocating internal combustion engine, rated at 3,251 bhp, supplying <br />power to an approximately 2,400 kW generator. This engine is equipped <br />021 <br />10GU1130 <br />with an aftercooler for emission control. The unit is subject to NSPS <br />Subpart IIII, and its serial plate lists that it is a 'Stationary Tier 1' engine. <br />This emergency generator provides backup power to the Shaft #2 fan <br />such that miners will receive adequate ventilation air during an electrical <br />failure at the mine. <br />One (1) pneumatically loaded rock dust silo equipped with a pulse jet <br />baghouse to control particulate matter emissions. This unit was <br />N/A <br />N/A <br />previously unreported to the Division and had not been issued an AIRS <br />Point Number or been incorporated into the source's Permit. An APEN <br />for this Point was received on February 15, 2013. <br />One (1) diesel fueled reciprocating internal combustion engine, rated at <br />50 hp, supplying power to the emergency backup generator for the main <br />office building server. The unit was manufactured in 2009 and installed at <br />N/A <br />N/A <br />MCC in 2010, and is thus subject to NSPS Subpart IIII. The engine was <br />previously unreported to the Division and had not been issued an AIRS <br />Point Number or Permit. An APEN for this Point was received on <br />February 15, 2013. <br />One (1) diesel fueled reciprocating internal combustion engine, rated at <br />66.9 hp, used as a start-up generator for the main emergency fan <br />generator (Point 021). The unit was manufactured in September of 2005 <br />and installed new at MCC in 2010. As the unit was not previously <br />N/A <br />N/A <br />operated outside of Colorado prior to installation, it is not subject to State - <br />only relocation provisions of Regulation 6, Part B, Section I.B., and thus <br />does not require an APEN submission or Permit. The engine was <br />previously unreported to the Division, but will not been issued an AIRS <br />Point Number or Permit. <br />2012 Air Pollution Inspection <br />0510015-INSP-2012.docx Page 9 of 30 <br />