# United Taconite LLC - Fairlane Plant **Table 1: Facility-wide Potential to Emit Calculations for NOx and SO2**

SV EU EU_Desc Tput_Hr Tput_Hr_Note Tput_Ann Tput_Ann_Note Units Pollutant Unc lbs/hr Unc tons/yr PTE lbs/hr PTE tons/yr SV 046 EU 040 Line 1 Pellet Induration 250 [101] 2,190,000 [101]LT pellets NOx 3.6964 [104] 924[110] 1,655 [112] [114] 924 [117] 1,655 [119] SV 046 EU 040 Line 1 Pellet Induration 190 [101] 1,664,400 [101]MM Btu SO2 4 [105] 1,013 [110] 1,724 [112] 25 [115] 760 [117] 1,293 [119] SV 048, 049 EU 042 Line 2 Pellet Induration 600 [101] 5,256,000 [101]LT pellets NOx 4.1299 [104] 2,478 [110] 3,692 [112] [114] 2,478 [117] 3,692 [120] SV 048, 049 EU 042 Line 2 Pellet Induration 400 [101] 3,504,000 [101]MM Btu SO2 4 [106] 2,133 [110] 3,192 [112] 25 [116] 1,600 [117] 2,394 [120] SV 105 EU 049 General Office Boiler (firing distillate fuel oil) 0.0058 [102] 51 [103]1000 gallonsNOx 20 [107] 0.12 [111] 0.51 [113] [114] 0.12 [118] 0.51 [121] SV 105 EU 049 General Office Boiler (firing distillate fuel oil) 0.0058 [102] 51 [103]1000 gallonsSO2 7.1 [107] 0.04[111] 0.18 [113] [114] 0.04[118] 0.18 [121] SV 106 EU 050 Fairlane Office Boiler (firing natural gas) 0.0017 [102] 14[103]MM cf NOx 100 [108] 0.17 [111] 0.72 [113] [114] 0.17 [118] 0.72 [121] SV 106 EU 050 Fairlane Office Boiler (firing natural gas) 0.0017 [102] 14[103]MM cf SO2 0.6 [109] 0.00 [111] 0.00 [113] [114] 0.00 [118] 0.00 [121] SV 107 EU 051 Fairlane Truck Shop Boiler (firing distillate fuel oil) 0.12 [102] 1,030 [103]1000 gallonsNOx 20 [107] 2.35 [111] 10.30 [113] [114] 2.35 [118] 10.30 [121] SV 107 EU 051 Fairlane Truck Shop Boiler (firing distillate fuel oil) 0.12 [102] 1,030 [103]1000 gallonsSO2 7.1 [107] 0.83 [111] 3.66 [113] [114] 0.83 [118] 3.66 [121] SV 107 EU 051 Fairlane Truck Shop Boiler (firing natural gas) 0.016 [102] 141 [103]MM cf NOx 100 [108] 1.61 [111] 7.07 [113] [114] 1.61 [118] 7.07 [121] SV 107 EU 051 Fairlane Truck Shop Boiler (firing natural gas) 0.016 [102] 141 [103]MM cf SO2 0.6 [109] 0.01 [111] 0.04 [113] [114] 0.01 [118] 0.04[121] SV 108 EU 052 Fairlane New Shop Boiler (firing distillate fuel oil) 0.075 [102] 654[103]1000 gallonsNOx 20 [107] 1.49 [111] 6.54 [113] [114] 1.49 [118] 6.54[121] SV 108 EU 052 Fairlane New Shop Boiler (firing distillate fuel oil) 0.075 [102] 654[103]1000 gallonsSO2 7.1 [107] 0.53 [111] 2.32 [113] [114] 0.53 [118] 2.32 [121] SV 108 EU 052 Fairlane New Shop Boiler (firing natural gas) 0.010 [102] 90 [103]MM cf NOx 100 [108] 1.03 [111] 4.49 [113] [114] 1.03 [118] 4.49 [121] SV 108 EU 052 Fairlane New Shop Boiler (firing natural gas) 0.010 [102] 90 [103]MM cf SO2 0.6 [109] 0.01 [111] 0.03 [113] [114] 0.01 [118] 0.03 [121] SV 109 EU 053 Fuel Handling Boiler #1 (firing distillate fuel oil) 0.075 [102] 654[103]1000 gallonsNOx 20 [107] 1.49 [111] 6.54 [113] [114] 1.49 [118] 6.54[121] SV 109 EU 053 Fuel Handling Boiler #1 (firing distillate fuel oil) 0.075 [102] 654[103]1000 gallonsSO2 7.1 [107] 0.53 [111] 2.32 [113] [114] 0.53 [118] 2.32 [121] SV 110 EU 054 Fuel Handling Boiler #2 (firing distillate fuel oil) 0.075 [102] 654[103]1000 gallonsNOx 20 [107] 1.49 [111] 6.54 [113] [114] 1.49 [118] 6.54[121] SV 110 EU 054 Fuel Handling Boiler #2 (firing distillate fuel oil) 0.075 [102] 654[103]1000 gallonsSO2 7.1 [107] 0.53 [111] 2.32 [113] [114] 0.53 [118] 2.32 [121]

Total NOx: 3,409.1 5,378.2 3,409.1 5,378.2 Total SO2: 3,149.1 4,926.8 2,362.5 3,697.8

**Notes:** [101] Maximum hourly throughput = Design capacity of emission unit (LT pellets/hr):

Line 1 Pellet Induration 250LT pellets/hr 190MM Btu/hr Line 2 Pellet Induration 600LT pellets/hr 400MM Btu/hr [102] Maximum hourly throughput = Design Heat input of emission unit (MM Btu/hr), converted to fuel units (1000 gallons/hr or MM cf/hr) using the following heat contents: Distillate fuel oil 140MM Btu/1000 gals (from AP-42, May 2010, Table 1.3-2 footnote d) Natural gas 1,020MM Btu/MM cf (from AP-42, July 1998, Table 1.4-1 footnote a) [103] Maximum annual throughput = Maximum hourly throughput x 8,760 hrs/yr. [104] Emission Factor developed as part of the Green Production Project permit application which resulted in permit 13700113-005, issued 8/19/2010: Date Units 5/3/2005 lbs/LT pellets 5/3/2006 lbs/LT pellets Maximum lbs/LT pellets Maximum +10% lbs/LT pellets Date Units 4/27/2006 lbs/LT pellets Maximum lbs/LT pellets Maximum +10% lbs/LT pellets [105] Permit limit specified in permit 13700113-005, issued 8/19/2010, page A-49. Limit comes from Minn. R. 7011.0610, subp. 2(B) when firing solid fuel. [106] Permit limit specified in permit 13700113-005, issued 8/19/2010, page A-56. Limit comes from Minn. R. 7011.0610, subp. 2(B) when firing solid fuel. [107] AP-42, May 2010, Table 1.3-1 for Boilers < 100 MM Btu/hr, firing distillate oil. Sulfur content of fuel is assumed to be no greater than 0.05 wt.%. [108] AP-42, July 1998, Table 1.4-1 for Small Boilers < 100 MM Btu/hr, uncontrolled. [109] AP-42, July 1998, Table 1.4-2. [110] Max. Uncontrolled Emissions (lbs/hr) = Max. Controlled Emissions (lbs/hr) / ((100-Control Eff.)/100). [111] Max. Uncontrolled Emissions (lbs/hr) = Max. Hourly Throughput (units/hr) x Uncontrolled Emission Factor (lbs/unit). [112] Max. Uncontrolled Emissions (tons/yr) = Max. Controlled Emissions (tons/yr) / ((100-Control Eff.)/100). [113] Max. Uncontrolled Emissions (tons/yr) = Max. Annual Throughput (units/yr) x Uncontrolled Emission Factor (lbs/unit) / 2,000 (lbs/ton). [114] No Air Pollution Control Devices (APCDs) are used in this process. [115] Maximum control efficiency specified in permit 13700113-005, issued 8/19/2010, page A-51. [116] Maximum control efficiency specified in permit 13700113-005, issued 8/19/2010, page A-58. [117] Max. Controlled Emissions (lbs/hr) = Max. Hourly Throughput (units/hr) x Controlled Emission Factor (lbs/unit). [118] Max. Controlled Emissions (lbs/hr) = Max. Uncontrolled Emissions (lbs/hr) x ((100-Control Eff.)/100). [119] Permit limit specified in permit 13700113-005, issued 8/19/2010, page A-49. [120] Permit limit specified in permit 13700113-005, issued 8/19/2010, page A-56. [121] Max. Controlled Emissions (tons/yr) = Max. Uncontrolled Emissions (tons/yr) x ((100-Control Eff.)/100). **Stack ID Emission Unit**  **Throughput Pollutant** 

(Units/hr) (Units/yr) (lbs/Unit) (%) **ID Description**  **Maximum Units**  **Emission Factor Control Efficiency** 

(lbs/hr) (tons/yr) **Max. Uncontrolled Emissions Max. Controlled Emissions** 

(lbs/hr) (tons/yr)

Worst-case Line 1 NOx emission factor is based on the "maximum stack test result + 10 % safety factor" while firing natural gas, as follows:

Worst-case Line 2 NOx emission factor is based on the "maximum stack test result + 10 % safety factor" while firing natural gas, as follows: Test [22] 3.7544 3.7544 **4.1299** 3.3604 **3.6964** Emission Factor Test [19] [22] Emission Factor 2.8905 3.3604

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