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Create an editable spreadsheet with the information indicated below. Each step in your calculations needs to be clear and easy to follow.

Facility information

Provide the facility information listed on the Calculating emissions page.

Emission calculations

Generally, you will list the pollutants your facility emits in the left column, and each calculation will be another column in your spreadsheet. Provide the formula or equation for each calculation.

  • List the GHGs that the process or unit emits:
    • Carbon dioxide
    • Methane
    • Nitrous oxide
    • Hydrofluorocarbons
    • Perfluorocarbons
    • Sulfur hexafluoride
    • Carbon dioxide equivalent
  • For each pollutant except carbon-dioxide equivalent, provide the emission factor. Hydrofluorocarbons and perfluorocarbons are each reported as the total of several individual compounds (see Table A-1 of Subpart A of 40 CFR Part 98), but document the emission factor for each compound. Use uncontrolled emission factors, and include the applicable units.
  • List the global warming potential of each pollutant except carbon dioxide equivalent, found in Table A-1 of Subpart A of 40 CFR Part 98.
  • Calculate the mass emission rate:
    • Mass emission rate (lb/hr) = Emission factor (lb/unit) x Capacity (unit/hr)
  • Calculate the maximum uncontrolled mass emissions:
    • Maximum uncontrolled mass emissions (tons/yr) = Mass emission rate (lb/hr) x 8760 (hrs/yr) x 0.0005 (tons/lb)
  • Calculate the maximum uncontrolled carbon dioxide equivalent:
    • Max uncontrolled carbon dioxide equivalent (tons/yr) = [1 x uncontrolled carbon dioxide (tons/yr)] + [25 x uncontrolled methane (tons/yr)] + [298 x uncontrolled nitrous oxide (tons/yr)] + [22800 x uncontrolled sulfur hexafluoride (tons/yr)] + [GWPPFCn x uncontrolled PFCn (tons/yr)] + [GWPHFCn x uncontrolled HFCn (tons/yr)]
  • Include the pollution control efficiency percentage, which is the capture efficiency percentage multiplied by the destruction/collection efficiency percentage (shown on Form GI-05A or similar), for each pollutant. Form CD-05 also requires a plan to demonstrate and maintain the destruction/collection efficiency. If there is no control for a particular pollutant, indicate “zero” as the control efficiency. Don't enter a control efficiency for carbon dioxide equivalent.
  • Calculate the maximum controlled mass emission rate for each GHG expect carbon dioxide equivalent:
    • Max. controlled mass emission rate (lb/hr) = Mass emission rate (lb/hr) x {[100 – Pollution control efficiency] ÷ 100}
  • Calculate the maximum controlled mass emissions for each GHG except carbon dioxide equivalent:
    • Max. controlled mass emissions (tons/year) = Maximum controlled mass emissions (tons/year) x {[100 – Pollution control efficiency] ÷ 100}
  • Calculate the maximum controlled carbon dioxide equivalent:
    • Max controlled carbon dioxide equivalent (tons/yr) = [1 x controlled carbon dioxide (tons/yr)] + [25 x controlled methane (tons/yr)] + [298 x controlled nitrous oxide (tons/yr)] + [22800 x controlled sulfur hexafluoride (tons/yr)] + [GWPPFCn x controlled PFCn (tons/yr)] + [GWPHFCn x controlled HFCn (tons/yr)]
  • Calculate actual emissions (tons/year) for existing units, take an average of the usage data from the previous two calendar years. For registration permit Option D applicants, use the previous 12 months of operation. To calculate actual emissions using the above equations, substitute actual operating parameters and/or hours per year operated for the maximum capacities to get mass emissions in tons per year. Then multiply these calculated actual mass emissions by the appropriate global warming potential for each pollutant, and add them together to get the carbon dioxide equivalent.
  • Find the limited controlled mass and carbon-dioxide equivalent emissions (tons/year) by taking into account all your facility's operation limits, such as hours of operation, amount of material handled, etc. Repeat the emission rate calculation by multiplying the emission factor by the maximum capacity of the operation, but take into account your operation limits. If an emission unit is subject to an emission limitation specified in 40 CFR pt. 60, 40 CFR pt. 61, 40 CFR pt. 63, or Minn. R. ch. 7011 or you are proposing a more stringent limit, you must indicate this and include those factors in the calculation. Registration Permit D applicants can skip this step.