GHG Summary Report

CO2 equivalent emissions from facility subparts C-II, SS, and TT (metric tons):333,176.3
CO2 equivalent emissions from supplier subparts LL-QQ (metric tons):
Biogenic CO2 emissions from facility subparts C-II, SS, and TT (metric tons):0
Cogeneration Unit Emissions Indicator:N
GHG Report Start Date:2020-01-01
GHG Report End Date:2020-12-31
Description of Changes to Calculation Methodology:
Plant Code Indicator:N
Primary NAICS Code:331110
Second Primary NAICS Code:

Parent Company Details:

Parent Company Name:NUCOR CORP
Address:1915 Rexford Road #400, Charlotte, NC 28211-3888
Percent Ownership Interest:100

Subpart C: General Stationary Fuel Combustion

Gas Information Details

Gas Name	Carbon Dioxide
Gas Quantity	108,261.3 (Metric Tons)
Own Result?

Gas Name	Biogenic Carbon dioxide
Gas Quantity	0 (Metric Tons)
Own Result?

Gas Name	Methane
Gas Quantity	2.04 (Metric Tons)
Own Result?

Gas Name	Nitrous Oxide
Gas Quantity	0.205 (Metric Tons)
Own Result?

Unit Details:

Unit Name : CP-#3
Unit Type : OCS (Other combustion source)
Unit Description :
Other Unit Name :

Common Pipe Details:
Use Ivt Indicator: Y
Maximum Rated Heat Input Capacity: 1.8
Cumulative Maximum Rated Heat Input Capacity:

Emission Details:
Annual Biogenic CO2 Emissions: 0 (metric tons)
Annual Fossil fuel based CO2 Emissions: 0 (metric tons)

Tier Fuel Details:

Fuel : Natural Gas (Weighted U.S. Average)
Tier Name : Tier 1 (Equation C-1a, natural gas billing in therms)
Tier Methodology Start Date : 2020-01-01
Tier Methodology End Date : 2020-12-31

Fuel Emission Details :

Total CO2 emissions	Total CH4 emissions	Total N2O emissions	Total CH4 emissions CO2e	Total N2O emissions CO2e
391.7 (Metric Tons)	0.01 (Metric Tons)	0.001 (Metric Tons)	0.2 (Metric Tons)	0.2 (Metric Tons)

Unit Name : CP-#1
Unit Type : OCS (Other combustion source)
Unit Description :
Other Unit Name :

Common Pipe Details:
Use Ivt Indicator: Y
Maximum Rated Heat Input Capacity: 200
Cumulative Maximum Rated Heat Input Capacity: 1015

Emission Details:
Annual Biogenic CO2 Emissions: 0 (metric tons)
Annual Fossil fuel based CO2 Emissions: 107777 (metric tons)

Tier Fuel Details:

Fuel : Natural Gas (Weighted U.S. Average)
Tier Name : Tier 2 (Equation C-2a)
Tier Methodology Start Date : 2020-01-01
Tier Methodology End Date : 2020-12-31
Frequency of HHV determinations : Monthly

Tier 2 Monthly HHV Details :

January	February	March	April	May	June	July	August	September	October	November	December
N	N	N	N	N	N	N	N	N	N	N	N

Fuel Emission Details :

Total CO2 emissions	Total CH4 emissions	Total N2O emissions	Total CH4 emissions CO2e	Total N2O emissions CO2e
107777.1 (Metric Tons)	2.03 (Metric Tons)	0.203 (Metric Tons)	50.8 (Metric Tons)	60.5 (Metric Tons)

Unit Name : GP-#2
Unit Type : OCS (Other combustion source)
Unit Description :
Other Unit Name :

Small Unit Aggregation Details:
Use Ivt Indicator: Y
Highest Maximum Rated Heat Input Capacity: 3
Cumulative Maximum Rated Heat Input Capacity:

Emission Details:
Annual CO₂ mass emissions from sorbent: 0 (Metric Tons)
Annual Biogenic CO2 Emissions: 0 (metric tons)
Annual Fossil fuel based CO2 Emissions: 92.5 (metric tons)

Tier Fuel Details:

Fuel : Propane
Tier Name : Tier 1 (Equation C-1)
Tier Methodology Start Date : 2020-01-01
Tier Methodology End Date : 2020-12-31

Fuel Emission Details :

Total CO2 emissions	Total CH4 emissions	Total N2O emissions	Total CH4 emissions CO2e	Total N2O emissions CO2e
92.5 (Metric Tons)	0.00 (Metric Tons)	0.001 (Metric Tons)	0.1 (Metric Tons)	0.3 (Metric Tons)

Subpart Q: Iron and Steel Production

CEMS Monitoring Location (CML) Details

CML Name : Baghouse 2
Description :
Configuration Type : Process/stationary combustion units share common stack
Types of Fuel Combusted : Natural Gas, Carbon

Tier 4 Methodology Information
Methodology Start Date : 2020-01-01
Methodology End Date : 2020-12-31

Quarterly CO2 Emissions
First Quarter : 25390 (metric tons)
Second Quarter : 15821 (metric tons)
Third Quarter : 24482 (metric tons)
Fourth Quarter : 28080 (metric tons)

Annual CO2 Emissions
Total annual CO2 mass emissions (biogenic and non-biogenic) measured by the CEMS: 93773 (metric tons)
Emissions reported for the CEMS include emissions calculated according to 98.33(a)(4)(viii) for a slipstream that bypassed the CEMS. :
Total annual biogenic CO2 : 0 (metric tons)
Total annual non-biogenic CO2 : 93773 (metric tons)

Equation C-10 Summary and Results
Total CH4 : 4.5 (metric tons)
Total N2O : 6.7 (metric tons)

Additional Emissions Information

Total source operating hours in the reporting year	7980 (hours)
Total Operating hours in which a substitute data value was used in the emissions calculations for CO2 concentration	23 (hours)
Total Operating hours in which a substitute data value was used in the emissions calculations for stack gas flow rate	0 (hours)
Total Operating hours in which a substitute data value was used in the emissions calculations for stack gas moisture content	0 (hours)

Process Units:

Unit Name : AOD

Unit Name : EAF 2

Unit Name : EAF 1

CML Name : Baghouse 1
Description :
Configuration Type : Process/stationary combustion units share common stack
Types of Fuel Combusted : Natural Gas, Carbon

Tier 4 Methodology Information
Methodology Start Date : 2020-01-01
Methodology End Date : 2020-12-31

Quarterly CO2 Emissions
First Quarter : 34349 (metric tons)
Second Quarter : 23447 (metric tons)
Third Quarter : 34180 (metric tons)
Fourth Quarter : 35009 (metric tons)

Annual CO2 Emissions
Total annual CO2 mass emissions (biogenic and non-biogenic) measured by the CEMS: 126985 (metric tons)
Emissions reported for the CEMS include emissions calculated according to 98.33(a)(4)(viii) for a slipstream that bypassed the CEMS. :
Total annual biogenic CO2 : 0 (metric tons)
Total annual non-biogenic CO2 : 126985 (metric tons)

Equation C-10 Summary and Results
Total CH4 : 4.1 (metric tons)
Total N2O : 6.1 (metric tons)

Additional Emissions Information

Total source operating hours in the reporting year	7900 (hours)
Total Operating hours in which a substitute data value was used in the emissions calculations for CO2 concentration	20 (hours)
Total Operating hours in which a substitute data value was used in the emissions calculations for stack gas flow rate	0 (hours)
Total Operating hours in which a substitute data value was used in the emissions calculations for stack gas moisture content	0 (hours)

Process Units:

Unit Name : EAF 1

Unit Name : EAF 2

Unit Name : AOD

Gas Information Details

Gas Name	Carbon Dioxide
Gas Quantity	220,773.5 (Metric Tons)
Own Result?

Gas Name	Biogenic Carbon dioxide
Gas Quantity	0 (Metric Tons)
Own Result?

Gas Name	Methane
Gas Quantity	8.6 (Metric Tons)
Own Result?

Gas Name	Nitrous Oxide
Gas Quantity	12.8 (Metric Tons)
Own Result?

The values below are total values for units where the CO₂ emissions were calculated using the mass balance methodology
Annual mass of fuel consumed: ()
Average carbon content of fuels: ()
Annual mass of non-fuels consumed: ()
Average carbon content of non-fuels: ()
Annual mass of products and byproducts produced: ()
Average carbon content of byproducts: ()

No Cems Unit Details:

Unit Name: Castrip Vacuum Tank Degasser
Unit Description:
Unit Type: Decarburization Vessel

CO2Emissions: 15.5 (Metric Tons)

Inputs/Outputs:

Name	Type	Classification	# of Times Carbon Content Substituted	Carbon Content Basis	Other Carbon Content Basis	Annual Quantity Substituted Data Method
				Supplier
			0	Supplier
			0	ASTM D5373-08

Flares

Cems Unit Data:

Unit Name: EAF 1
Unit Description:
Unit Type: Electric Arc Furnace (EAF)
Annual production of taconite pellets:
Annual production of molten raw steel: ()
Annual production of coke:
Annual production of sinter:
Annual production of direct reduced iron:

Unit Name: EAF 2
Unit Description:
Unit Type: Electric Arc Furnace (EAF)
Annual production of taconite pellets:
Annual production of molten raw steel: ()
Annual production of coke:
Annual production of sinter:
Annual production of direct reduced iron:

Unit Name: AOD
Unit Description:
Unit Type: Decarburization Vessel
Annual production of taconite pellets:
Annual production of molten raw steel: ()
Annual production of coke:
Annual production of sinter:
Annual production of direct reduced iron: