GHG Summary Report

CO2 equivalent emissions from facility subparts C-II, SS, and TT (metric tons):120,280.9
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:ALLEGHENY TECHNOLOGIES INC
Address:1000 Six PPG Place, Pittsburgh, PA 15222
Percent Ownership Interest:100

Subpart C: General Stationary Fuel Combustion

Gas Information Details

Gas Name	Carbon Dioxide
Gas Quantity	102,957.7 (Metric Tons)
Own Result?

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

Gas Name	Methane
Gas Quantity	1.94 (Metric Tons)
Own Result?

Gas Name	Nitrous Oxide
Gas Quantity	0.194 (Metric Tons)
Own Result?

Unit Details:

Unit Name : 0202
Unit Type : PRH (Process Heater)
Unit Description :

Individual Unit Details:
Use Ivt Indicator: Y
Maximum Rated Heat Input Capacity: 465 (mmBtu/hr)

Emission Details:
Annual CO₂ mass emissions from sorbent: 0 (Metric Tons)
Annual Biogenic CO2 Emissions: 0 (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 : Semiannually

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
30383.4 (Metric Tons)	0.57 (Metric Tons)	0.057 (Metric Tons)	14.3 (Metric Tons)	17.1 (Metric Tons)

Unit Name : 0201
Unit Type : PRH (Process Heater)
Unit Description :

Individual Unit Details:
Use Ivt Indicator: Y
Maximum Rated Heat Input Capacity: 465 (mmBtu/hr)

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

Tier Fuel 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
36607.0 (Metric Tons)	0.69 (Metric Tons)	0.069 (Metric Tons)	17.2 (Metric Tons)	20.6 (Metric Tons)

Unit Name : GP-001
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: 15
Cumulative Maximum Rated Heat Input Capacity: 81.0

Emission Details:
Annual CO₂ mass emissions from sorbent: 0 (Metric Tons)
Annual Biogenic CO2 Emissions: 0 (metric tons)
Annual Fossil fuel based CO2 Emissions: 9669 (metric tons)

Tier Fuel 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
9669.0 (Metric Tons)	0.18 (Metric Tons)	0.018 (Metric Tons)	4.6 (Metric Tons)	5.4 (Metric Tons)

Unit Name : GP-002
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: 49
Cumulative Maximum Rated Heat Input Capacity: 665.8

Emission Details:
Annual CO₂ mass emissions from sorbent: 0 (Metric Tons)
Annual Biogenic CO2 Emissions: 0 (metric tons)
Annual Fossil fuel based CO2 Emissions: 26298 (metric tons)

Tier Fuel 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
26298.3 (Metric Tons)	0.50 (Metric Tons)	0.050 (Metric Tons)	12.4 (Metric Tons)	14.8 (Metric Tons)

Subpart Q: Iron and Steel Production

CEMS Monitoring Location (CML) Details

Gas Information Details

Gas Name	Carbon Dioxide
Gas Quantity	17,216.9 (Metric Tons)
Own Result?

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

Gas Name	Methane
Gas Quantity	0 (Metric Tons)
Own Result?

Gas Name	Nitrous Oxide
Gas Quantity	0 (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: 112 - EAF 1 (DEC Baghouse)
Unit Description:
Unit Type: Electric Arc Furnace (EAF)
CO2Emissions: 3156.9 (Metric Tons)
The number of times that missing data procedures were followed and the performance test was repeated to determine the site-specific emission factor: (months)
Average hourly CO₂ emission rate during test: 0.9897 (metric tons/hour)

Unit Name: 113 - EAF 1 (Canopy Baghouse & AOD)
Unit Description:
Unit Type: EAF/Decarburization Vessel Exhausting to Common Stack/Vent
CO2Emissions: 9118.2 (Metric Tons)
The number of times that missing data procedures were followed and the performance test was repeated to determine the site-specific emission factor: (months)
Average hourly CO₂ emission rate during test: 2.8586 (metric tons/hour)

Unit Name: 110 - EAF 2 (Canopy Baghouse)
Unit Description:
Unit Type: Electric Arc Furnace (EAF)
CO2Emissions: 2827.1 (Metric Tons)
The number of times that missing data procedures were followed and the performance test was repeated to determine the site-specific emission factor: (months)
Average hourly CO₂ emission rate during test: 0.7040 (metric tons/hour)

Unit Name: 109 - EAF 2 (DEC Baghouse)
Unit Description:
Unit Type: Electric Arc Furnace (EAF)
CO2Emissions: 2114.7 (Metric Tons)
The number of times that missing data procedures were followed and the performance test was repeated to determine the site-specific emission factor: (months)
Average hourly CO₂ emission rate during test: 0.5266 (metric tons/hour)

Flares