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 gallons NOx 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 gallons SO2 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 gallons NOx 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 gallons SO2 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 gallons NOx 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 gallons SO2 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 gallons NOx 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 gallons SO2 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 gallons NOx 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 gallons SO2 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 250 LT pellets/hr 190 MM Btu/hr

Line 2 Pellet Induration 600 LT pellets/hr 400 MM 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 140 MM Btu/1000 gals (from AP-42, May 2010, Table 1.3-2 footnote d)

Natural gas 1,020 MM 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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