Once the fuel types and CO₂ calculation method are specified, Cal e-GGRT will prompt the user for fuel specific emissions information. Although units using Tier 4 and alternative part 75 methods are not generally required to calculate fuel specific CO₂ mass emissions, such units are required to report fuel specific CH₄ and N₂O mass emissions. Fuel specific missing data information is reported under this section.

The text below describes how to enter subpart C Stationary Fuel Combustion Sources fuel-level emissions information for each configuration type. The process to edit fuel information for an existing configuration type is essentially similar.

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Starting on the Subpart C Overview page, find the configuration type for which you would like to enter emissions information in the CONFIGURATION SUMMARY table and click OPEN.

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To enter emissions information by fuel type, find the fuel type for which you would like to enter fuel emissions data in the FUEL-SPECIFIC EMISSIONS INFORMATION table and click OPEN.

The data entry screen will vary depending on the calculation methodology (tier and equation).

Tier 1 (Equation C-1, C-1a, or C-1b)

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For each fuel type (including biomass fuel(s)) for which you have elected to use a Tier 1 (Equation C-1, C-1a, or C-1b) methodology, subpart C requires you to report the following information by fuel type, which Cal e-GGRT will calculate based on provided inputs:

• The total annual CO₂ mass emissions derived from Equation C-1, Equation C-1a, or Equation C-1b in metric tons CO₂ (this value will include both non-biogenic and biogenic CO₂ as applicable) [98.36(b)(8)(i), 98.36(c)(1)(vi), 98.36(c)(3)(vii)]
• The total annual CH₄ mass emissions derived from Equation C-8, Equation C-8a, or Equation C-8b in metric tons CH₄ and in metric tons CO₂e (for Table C-2 fuels only). [98.36(b)(8)(i), 98.36(c)(1)(vi), 98.36(c)(3)(vii)]
• The total annual N₂O mass emissions derived from Equation C-8, Equation C-8a, or Equation C-8b in metric tons N₂O and in metric tons CO₂e (for Table C-2 fuels only). [98.36(b)(8)(i), 98.36(c)(1)(vi), 98.36(c)(3)(vii)]

Use the radio buttons to elect to report emissions using the Cal e-GGRT calculated value or to enter your own value manually. If you elect to report manually calculated emissions values, use the the appropriate radio buttons and data fields. Otherwise, the radio buttons will default to using the calculated results.

When finished, click NEXT.

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Use the Equation Inputs to enter:

• For Equation C-1
  • Mass or volume of fuel combusted per year
• For Equation C-1a
  • Annual natural gas usage
  • Annual volume of fuel combusted
  • For Equation C-1b
  • Annual natural gas usage
  • Annual volume of fuel combusted

When finished, click NEXT. On the Fuel-specific Emissions screen, click FINISHED to save the data entered for this fuel.

Tier 2 (Equations C-2a and C-2b)

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For each fuel type (including biomass fuel(s)) for which you have elected to use the Tier 2 (Equation C-2a) methodology, subpart C requires you to report the following information by fuel type, which Cal e-GGRT will calculate based on provided inputs:

• The total annual CO₂ mass emissions derived from Equation C-2a in metric tons CO₂ (this value will include both non-biogenic and biogenic CO₂ as applicable) [98.36(b)(8)(i), 98.36(c)(1)(vi), 98.36(c)(3)(vii)]
• The total annual CH₄ mass emissions derived from Equation C-9a in metric tons CH₄ and in metric tons CO₂e (for Table C-2 fuels only). [98.36(b)(8)(i), 98.36(c)(1)(vi), 98.36(c)(3)(vii)]
• The total annual N₂O mass emissions derived from Equation C-9a in metric tons N₂O and in metric tons CO₂e (for Table C-2 fuels only). [98.36(b)(8)(i), 98.36(c)(1)(vi), 98.36(c)(3)(vii)]

Use the radio buttons to elect to report emissions using the Cal e-GGRT calculated value or to enter your own value manually. If you elect to report manually calculated emissions values, use the the appropriate radio buttons and data fields. Otherwise, the radio buttons will default to using the calculated results.

Use the check boxes, plain text box, and drop-down menu to enter the remaining required emissions information.

• Identification of each month for which HHVs were calculated using one or more substitute data values [98.36(e)(2)(ii)(C)]
• The frequency of the HHV determinations [98.36(e)(2)(ii)(B)]
  • Hourly
  • Daily
  • Weekly
  • Monthly
  • Semiannually
  • Quarterly
  • Once per fuel lot
  • Upon addition of oil to the storage tank
  • Other (specify)

When finished, click NEXT.

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Use the Equation Inputs to enter required inputs:

• Fuel
• Higher heating value
• Emission Factor

To calculate the higher heating value:

• Download the "Equation C-2b spreadsheet to calculate Annual Average HHV"
• Complete the spreadsheet following embedded instructions
• Save the spreadsheet to your computer
• Enter the higher heating value into Cal e-GGRT
• Upload the saved Equation C-2b spreadsheet using the provided BROWSE and UPLOAD buttons.

When finished, click NEXT. On the Fuel-specific Emissions screen, click FINISHED to save the data entered for this fuel.

Tier 2 (Equation C-2c)

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For each fuel type (including biomass fuel(s)) for which you have elected to use the Tier 2 (Equation C-2c) methodology, subpart C requires you to report the following information by fuel type, which Cal e-GGRT will calculate based on provided inputs:

• The total annual CO₂ mass emissions derived from Equation C-2c in metric tons CO₂ (this value will include both non-biogenic and biogenic CO₂ as applicable) [98.36(b)(8)(i), 98.36(c)(1)(vi), 98.36(c)(3)(vii)]
• The total annual CH₄ mass emissions derived from Equation C-9b in metric tons CH₄ and in metric tons CO₂e (for Table C-2 fuels only). [98.36(b)(8)(i), 98.36(c)(1)(vi), 98.36(c)(3)(vii)]
• The total annual N₂O mass emissions derived from Equation C-9b in metric tons N₂O and in metric tons CO₂e (for Table C-2 fuels only). [98.36(b)(8)(i), 98.36(c)(1)(vi), 98.36(c)(3)(vii)]

Use the radio buttons to elect to report emissions using the Cal e-GGRT calculated value or to enter your own value manually. If you elect to report manually calculated emissions values, use the the appropriate radio buttons and data fields. Otherwise, the radio buttons will default to using the calculated results.

When finished, click NEXT.

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Use the Equation Inputs to enter required inputs:

• Mass of steam generated by MSW or solid fuel combustion
• Ratio of the boiler's max rated heat input capacity to its design rated steam output capacity
• Annual mass or volume of fuel combusted

When finished, click NEXT. On the Fuel-specific Emissions screen, click FINISHED to save the data entered for this fuel.

Tier 3 (Equation C-3, C-4, or C-5)

Note: Equation C-5 pictured, Equations C-3 and C-4 will not include the MOLECULAR WEIGHT INFORMATION section

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For each fuel type (including biomass fuel(s)) for which you have elected to use a Tier 3 (Equation C-3, C-4, or C-5) methodology, subpart C requires you to report the following information by fuel type, which Cal e-GGRT will calculate based on provided inputs:

• The total annual CO₂ mass emissions derived from Equation C-3 for solid fuels, Equation C-4 for liquid fuels, or Equation C-5 for gaseous fuels in metric tons CO₂ (this value will include both non-biogenic and biogenic CO₂ as applicable) [98.36(b)(8)(i), 98.36(c)(1)(vi), 98.36(c)(3)(vii)]
• The total annual CH₄ mass emissions derived from Equation C-8 in metric tons CH₄ and in metric tons CO₂e (for Table C-2 fuels only). [98.36(b)(8)(i), 98.36(c)(1)(vi), 98.36(c)(3)(vii)]
• The total annual N₂O mass emissions derived from Equation C-8 in metric tons N₂O and in metric tons CO₂e (for Table C-2 fuels only). [98.36(b)(8)(i), 98.36(c)(1)(vi), 98.36(c)(3)(vii)]

Use the radio buttons to elect to report emissions using the Cal e-GGRT calculated value or to enter your own value manually. If you elect to report manually calculated emissions values, use the the appropriate radio buttons and data fields. Otherwise, the radio buttons will default to using the calculated results.

Use the check boxes, plain text box, and drop-down menu to enter the remaining required emissions information.

• The total number of valid carbon content determinations [98.36(e)(2)(iv)(D)]
• The total number of carbon content substitute data values [98.36(e)(2)(iv)(E)]
• The frequency of carbon content determinations [98.36(e)(2)(iv)(B)]
  • Hourly
  • Daily
  • Weekly
  • Monthly
  • Semiannually
  • Quarterly
  • Once per fuel lot
  • Upon addition of oil to the storage tank
  • Other (specify)
• The total number of operating hours in the reporting year for which missing data substitution was used for fuel usage [98.3(c)(8)]

For each gaseous fuel at each configuration for which you have elected to use the Tier 3 (Equation C-5) methodology, subpart C requires you to report the following additional information:

• Total number of valid molecular weight determinations [98.36(e)(2)(iv)(D)]
• Total number of molecular weight substitute data values [98.36(e)(2)(iv)(E)]
• Frequency of molecular weight determinations [98.36(e)(2)(iv)(B)]
  • Hourly
  • Daily
  • Weekly
  • Monthly
  • Semiannually
  • Quarterly
  • Other (specify)

When finished, click NEXT.

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Use the Equation Inputs to enter required inputs:

• For Equation C-3
  • Mass of solid fuel combusted per year
  • Average carbon content of the solid fuel
• For Equation C-4
  • Volume of liquid fuel combusted per year
  • Average carbon content of the liquid fuel
• For Equation C-5
  • Volume of gaseous fuel combusted per year
  • Average carbon content of the gaseous fuel
  • Average molecular weight of the gaseous fuel
  • Molar volume conversion factor

To calculate the average carbon content of the fuels and average molecular weight of the gaseous fuel:

• Download the "Equation C-2b spreadsheet to calculate Annual Average CC" and Equation C-2b spreadsheet to calculate the Annual Average MW"
• Complete the spreadsheets following embedded instructions
• Save the spreadsheets to your computer
• Enter carbon content and molecular weight into Cal e-GGRT
• Upload the saved Equation C-2b spreadsheets using the provided BROWSE and UPLOAD buttons.

When finished, click NEXT. On the Fuel-specific Emissions screen, click FINISHED to save the data entered for this fuel.

Tier 4 (CEMS) and Year-Round Part 75 Heat Input Reporters

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For Tier 4 (CEMS) configurations and for configurations using the alternative CO₂ mass emissions calculation methods provided in 98.33(a)(5) (Year-round Part 75 heat input reporters), you are required to report the following information for each fuel type listed in Table C-2 (including biomass fuel(s)), which Cal e-GGRT will calculate based on provided inputs:

• The total annual CH₄ mass emissions derived from Equation C-10 in metric tons CH₄ and in metric tons CO₂e. [98.36(b)(9)(iii), 98.36(c)(2)(ix)]
• The total annual N₂O mass emissions derived from Equation C-10 in metric tons N₂O and in metric tons CO₂e. [98.36(b)(9)(iii), 98.36(c)(2)(ix)]

Use the radio buttons to elect to report emissions using the Cal e-GGRT calculated value or to enter your own value manually. If you elect to report manually calculated emissions values, use the the appropriate radio buttons and data fields. Otherwise, the radio buttons will default to using the calculated results.

When finished, click NEXT.

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Use the Equation Inputs to enter required inputs:

• Cumulative annual heat input from fuel combustion
• Annual mass or volume of fuel combusted
• Emission factor (if the fuel was entered manually)

When finished, click NEXT. On the Fuel-specific Emissions screen, click FINISHED to save the data entered for this fuel.

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See Also

Screen Errors
Using Cal e-GGRT to Prepare Your Subpart C Report
Subpart C Configurations
Subpart C Configuration-level Emissions Information
Subpart C Fuel Identification Information
Subpart Validation Report