Date Description SV EU CEs Pollutant

NOx 68.7

SO2 2.6

VOC 1.2

PM (Dry only) 0.0031

CO2 0.4

O2 20.3

NOx 51.3

SO2 7.7

VOC 0.5

PM (Dry only) 0.0026

CO2 0.4

O2 20.2

NOx 98.0

SO2 3.7

VOC 1.6

PM (Dry only) 0.0052

CO2 0.5

O2 19.8

NOx 62.0

SO2 9.2

VOC 0.5

PM (Dry only) 0.0029

CO2 0.5

O2 20.0

NOx 154.5

SO2 6.5

VOC 1.3

PM (Dry only) 0.0050

CO2 0.8

O2 19.3

NOx 88.4

SO2 9.9

VOC 0.4

PM (Dry only) 0.0041

CO2 0.6

O2 19.5

NOx 183.2

SO2 6.9

VOC 1.6

PM (Dry only) 0.0048

CO2 0.9

O2 18.9

NOx 96.5

SO2 11.2

VOC 0.4

PM (Dry only) 0.0038

CO2 0.6

O2 19.4

6/15/2005 Furnace Line 1 Stack 5B SV 022 EU 020 CEs 026, 023

6/16/2005 Furnace Line 1 Stack 5D SV 024 EU 020 CEs 026, 025

6/15-16/2005 Furnace Line 1 Stack 5C SV 023 EU 020 CEs 026, 024

6/23/2010 Furnace Line 1 Stack 5D SV 024 EU 020 CEs 026, 025

6/23/2010 Furnace Line 1 Stack 5C SV 023 EU 020 CEs 026, 024

6/22/2010 Furnace Line 1 Stack 5B SV 022 EU 020 CEs 026, 023

Hibbing Taconite Company

Flue Gas Composition - Furnace No. 1

Concentration

6/22/2010 Furnace Line 1 Stack 5A SV 021 EU 020 CEs 026, 022

6/14/2005 Furnace Line 1 Stack 5A SV 021 EU 020 CEs 026, 022
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Concentration
Date Description SV EU CEs Pollutant

NOx 136.1 ppmd

SO2 10.1 ppmd

VOC 0.9 ppmw

PM (Dry only) 0.0040 gr/dscf

CO2 0.8 %v/v

O2 19.2 %v/v

NOx 156.7 ppmd

SO2 14.5 ppmd

VOC 0.5 ppmw

PM (Dry only) 0.0050 gr/dscf

CO2 0.8 %v/v

O2 19.1 %v/v

NOx 119.3 ppmd

SO2 7.0 ppmd

VOC 1.1 ppmw

PM (Dry only) 0.0035 gr/dscf

CO2 0.7 %v/v

O2 19.4 %v/v

NOx 128.4 ppmd

SO2 11.3 ppmd

VOC 0.3 ppmw

PM (Dry only) 0.0045 gr/dscf

CO2 0.8 %v/v

O2 19.5 %v/v

NOx 84.2 ppmd

SO2 3.9 ppmd

VOC 0.9 ppmw

PM (Dry only) 0.0030 gr/dscf

CO2 0.5 %v/v

O2 20.0 %v/v

NOx 82.4 ppmd

SO2 8.0 ppmd

VOC 0.5 ppmw

PM (Dry only) 0.0043 gr/dscf

CO2 0.5 %v/v

O2 20.3 %v/v

NOx 64.2 ppmd

SO2 3.5 ppmd

VOC 1.0 ppmw

PM (Dry only) 0.0038 gr/dscf

CO2 0.4 %v/v

O2 20.2 %v/v

NOx 61.4 ppmd

SO2 5.7 ppmd

VOC 0.6 ppmw

PM (Dry only) 0.0055 gr/dscf

CO2 0.4 %v/v

O2 20.4 %v/v

Hibbing Taconite Company

Flue Gas Composition - Furnace No. 2

Concentration

6/10/2010 Furnace Line 2 Stack 5E SV 025 EU 021 CEs 031, 027

6/23-24/2004 Furnace Line 2 Stack 5E SV 025 EU 021 CEs 031, 027

6/23/2004 Furnace Line 2 Stack 5F SV 026 EU 021 CEs 031, 028

6/10/2010 Furnace Line 2 Stack 5F SV 026 EU 021 CEs 031, 028

6/9/2010 Furnace Line 2 Stack 5G SV 027 EU 021 CEs 031, 029

6/22-23/2004 Furnace Line 2 Stack 5G SV 027 EU 021 CEs 031, 029

6/22/2004 Furnace Line 2 Stack 5H SV 028 EU 021 CEs 031, 030

6/9/2010 Furnace Line 2 Stack 5H SV 028 EU 021 CEs 031, 030
Date Description SV EU CEs Pollutant

NOx 65.6

SO2 4.1

VOC 1.0

PM (Dry only) 0.0058

CO2 0.4

O2 20.2

NOx 42.2

SO2 6.0

VOC 0.5

PM (Dry only) 0.0019

CO2 0.3

O2 20.4

NOx 86.8

SO2 5.1

VOC 1.0

PM (Dry only) 0.0050

CO2 0.5

O2 20.1

NOx 53.4

SO2 8.7

VOC 0.5

PM (Dry only) 0.0032

CO2 0.5

O2 20.1

NOx 138.4

SO2 7.8

VOC 1.1

PM (Dry only) 0.0051

CO2 0.8

O2 19.3

NOx 90.3

SO2 13.6

VOC 0.3

PM (Dry only) 0.0028

CO2 0.8

O2 19.4

NOx 157.3

SO2 9.1

VOC 1.1

PM (Dry only) 0.0041

CO2 0.9

O2 19.0

NOx 157.3

SO2 9.1

VOC 1.1

PM (Dry only) 0.0029

CO2 0.9

O2 19.0

6/20/2005 Furnace Line 3 Stack 5M SV 032 EU 022 CEs 036, 035

6/21/2005 Furnace Line 3 Stack 5L SV 031 EU 022 CEs 036, 034

6/20/2010 Furnace Line 3 Stack 5M SV 032 EU 022 CEs 036, 035

6/18/2010 Furnace Line 3 Stack 5L SV 031 EU 022 CEs 036, 034

6/17/2010 Furnace Line 3 Stack 5K SV 030 EU 022 CEs 036, 033

6/21/2005 Furnace Line 3 Stack 5K SV 030 EU 022 CEs 036, 033

Hibbing Taconite Company

Flue Gas Composition - Furnace No. 3

Concentration

6/16/2010 Furnace Line 3 Stack 5J SV 029 EU 022 CEs 036, 032

6/22-23/2005 Furnace Line 3 Stack 5J SV 029 EU 022 CEs 036, 032
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Concentration