GHG Summary Report

CO2 equivalent emissions from facility subparts C-II, SS, and TT (metric tons):799,115.5
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:Y
Primary NAICS Code:221112
Second Primary NAICS Code:

Parent Company Details:

Parent Company Name:CMS ENERGY CORP
Address:One Energy Plaza, Jackson, MI 49203
Percent Ownership Interest:100

Subpart C: General Stationary Fuel Combustion

Gas Information Details

Gas Name	Carbon Dioxide
Gas Quantity	342.7 (Metric Tons)
Own Result?

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

Gas Name	Methane
Gas Quantity	0.01 (Metric Tons)
Own Result?

Gas Name	Nitrous Oxide
Gas Quantity	0.001 (Metric Tons)
Own Result?

Unit Details:

Unit Name : EUEDG
Unit Type : RICE (Reciprocating internal combustion engine)
Unit Description :

Individual Unit Details:
Use Ivt Indicator: N (EGU)
Maximum Rated Heat Input Capacity: 9.4 (mmBtu/hr)

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

Tier Fuel Details:

Fuel : Distillate Fuel Oil No. 2
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
2.4 (Metric Tons)	0.00 (Metric Tons)	0.000 (Metric Tons)	0 (Metric Tons)	0 (Metric Tons)

Equation C1/C8 Inputs :
Fuel Quantity : 230.6 (gallons/year)

Unit Name : CP-EU1BHEAT
Unit Type : OCS (Other combustion source)
Unit Description :
Other Unit Name :

Common Pipe Details:
Use Ivt Indicator: Y
Maximum Rated Heat Input Capacity: 0.757
Cumulative Maximum Rated Heat Input Capacity:

Emission Details:
Annual Biogenic CO2 Emissions: 0 (metric tons)
Annual Fossil fuel based CO2 Emissions: 320.3 (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 : Hourly

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
340.3 (Metric Tons)	0.01 (Metric Tons)	0.001 (Metric Tons)	0.2 (Metric Tons)	0.2 (Metric Tons)

Subpart D: Electricity Generation

Gas Information Details

Gas Name	Carbon Dioxide
Gas Quantity	797,961.8 (Metric Tons)
Own Result?

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

Gas Name	Methane
Gas Quantity	14.79 (Metric Tons)
Own Result?

Gas Name	Nitrous Oxide
Gas Quantity	1.479 (Metric Tons)
Own Result?

Unit Details:

Unit Name : LM4
Unit Type : Electricity Generator
Unit Description :
Plant Code : 55270 (numeric, maximum of 6 digits)
Part 75 Methodology : Appendix G, Equation G-4
Methodology Start Date: 2002-07-09
Methodology End Date: 2020-12-31
Acid Rain Program Indicator: Y

Emission Details:
Annual CO2 Emissions Including Biomass (metric tons): 92414.4
Annual CO2 Emissions Including Biomass (short tons): 101868.4
Annual CO2 Emissions from Biomass (metric tons): 0

Appendix G Equation G4:
Operating Hours Fuel Flow Rate: 7
Operating Hours HHV Substitution: 0

Electricity Fuel Details:

Fuel type: Natural Gas (Weighted U.S. Average)
Annual heat input: 1714131 (mmBtu)
CH₄ Emissions CO₂ Equivalent: 42.9 (Metric Tons)
N₂O Emissions CO₂ Equivalent: 51.1 (Metric Tons)

Unit Name : LM5
Unit Type : Electricity Generator
Unit Description :
Plant Code : 55270 (numeric, maximum of 6 digits)
Part 75 Methodology : Appendix G, Equation G-4
Methodology Start Date: 2002-07-08
Methodology End Date: 2020-12-31
Acid Rain Program Indicator: Y

Emission Details:
Annual CO2 Emissions Including Biomass (metric tons): 99926.2
Annual CO2 Emissions Including Biomass (short tons): 110148.6
Annual CO2 Emissions from Biomass (metric tons): 0

Appendix G Equation G4:
Operating Hours Fuel Flow Rate: 0
Operating Hours HHV Substitution: 0

Electricity Fuel Details:

Fuel type: Natural Gas (Weighted U.S. Average)
Annual heat input: 1853469 (mmBtu)
CH₄ Emissions CO₂ Equivalent: 46.3 (Metric Tons)
N₂O Emissions CO₂ Equivalent: 55.2 (Metric Tons)

Unit Name : 7EA
Unit Type : Electricity Generator
Unit Description :
Plant Code : 55270 (numeric, maximum of 6 digits)
Part 75 Methodology : Appendix G, Equation G-4
Methodology Start Date: 2002-06-25
Methodology End Date: 2020-12-31
Acid Rain Program Indicator: Y

Emission Details:
Annual CO2 Emissions Including Biomass (metric tons): 225857.2
Annual CO2 Emissions Including Biomass (short tons): 248962.4
Annual CO2 Emissions from Biomass (metric tons): 0

Appendix G Equation G4:
Operating Hours Fuel Flow Rate: 5
Operating Hours HHV Substitution: 0

Electricity Fuel Details:

Fuel type: Natural Gas (Weighted U.S. Average)
Annual heat input: 4189225 (mmBtu)
CH₄ Emissions CO₂ Equivalent: 104.7 (Metric Tons)
N₂O Emissions CO₂ Equivalent: 124.8 (Metric Tons)

Unit Name : LM1
Unit Type : Electricity Generator
Unit Description :
Plant Code : 55270 (numeric, maximum of 6 digits)
Part 75 Methodology : Appendix G, Equation G-4
Methodology Start Date: 2002-07-10
Methodology End Date: 2020-12-31
Acid Rain Program Indicator: Y

Emission Details:
Annual CO2 Emissions Including Biomass (metric tons): 97022.8
Annual CO2 Emissions Including Biomass (short tons): 106948.2
Annual CO2 Emissions from Biomass (metric tons): 0

Appendix G Equation G4:
Operating Hours Fuel Flow Rate: 0
Operating Hours HHV Substitution: 0

Electricity Fuel Details:

Fuel type: Natural Gas (Weighted U.S. Average)
Annual heat input: 1799614 (mmBtu)
CH₄ Emissions CO₂ Equivalent: 45.0 (Metric Tons)
N₂O Emissions CO₂ Equivalent: 53.6 (Metric Tons)

Unit Name : LM2
Unit Type : Electricity Generator
Unit Description :
Plant Code : 55270 (numeric, maximum of 6 digits)
Part 75 Methodology : Appendix G, Equation G-4
Methodology Start Date: 2002-07-10
Methodology End Date: 2020-12-31
Acid Rain Program Indicator: Y

Emission Details:
Annual CO2 Emissions Including Biomass (metric tons): 95511.3
Annual CO2 Emissions Including Biomass (short tons): 105282.1
Annual CO2 Emissions from Biomass (metric tons): 0

Appendix G Equation G4:
Operating Hours Fuel Flow Rate: 0
Operating Hours HHV Substitution: 0

Electricity Fuel Details:

Fuel type: Natural Gas (Weighted U.S. Average)
Annual heat input: 1771561 (mmBtu)
CH₄ Emissions CO₂ Equivalent: 44.3 (Metric Tons)
N₂O Emissions CO₂ Equivalent: 52.8 (Metric Tons)

Unit Name : LM3
Unit Type : Electricity Generator
Unit Description :
Plant Code : 55270 (numeric, maximum of 6 digits)
Part 75 Methodology : Appendix G, Equation G-4
Methodology Start Date: 2002-08-04
Methodology End Date: 2020-12-31
Acid Rain Program Indicator: Y

Emission Details:
Annual CO2 Emissions Including Biomass (metric tons): 90744
Annual CO2 Emissions Including Biomass (short tons): 100027.1
Annual CO2 Emissions from Biomass (metric tons): 0

Appendix G Equation G4:
Operating Hours Fuel Flow Rate: 6
Operating Hours HHV Substitution: 0

Electricity Fuel Details:

Fuel type: Natural Gas (Weighted U.S. Average)
Annual heat input: 1683116 (mmBtu)
CH₄ Emissions CO₂ Equivalent: 42.1 (Metric Tons)
N₂O Emissions CO₂ Equivalent: 50.2 (Metric Tons)

Unit Name : LM6
Unit Type : Electricity Generator
Unit Description :
Plant Code : 55270 (numeric, maximum of 6 digits)
Part 75 Methodology : Appendix G, Equation G-4
Methodology Start Date: 2002-07-09
Methodology End Date: 2020-12-31
Acid Rain Program Indicator: Y

Emission Details:
Annual CO2 Emissions Including Biomass (metric tons): 96485.9
Annual CO2 Emissions Including Biomass (short tons): 106356.4
Annual CO2 Emissions from Biomass (metric tons): 0

Appendix G Equation G4:
Operating Hours Fuel Flow Rate: 0
Operating Hours HHV Substitution: 0

Electricity Fuel Details:

Fuel type: Natural Gas (Weighted U.S. Average)
Annual heat input: 1789618 (mmBtu)
CH₄ Emissions CO₂ Equivalent: 44.7 (Metric Tons)
N₂O Emissions CO₂ Equivalent: 53.3 (Metric Tons)