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- If you monitor gas composition, calculate the CO2 emissions from the flare using either the Equation Y-1a or Equation Y-1b Calculation Spreadsheet. You may elect to use either equation. Equation Y-1b is more data intensive, but is expected to be more accurate, particularly if there is a high level of CO2 in the gas stream being sent to the flare.
- If you monitor heat content but do not monitor gas composition, calculate the CO2 emissions from the flare using the Equation Y--2 Calculation Spreadsheet.
- If you do not measure the higher heating value or carbon content of the flare gas at least weekly, determine the quantity of gas discharged to the flare separately for periods of routine flare operation and for periods of start-up, shutdown, or malfunction, and calculate the CO2 emissions using the Equation Y-3 Calculation Spreadsheet.
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Per §98.172(b), if you are reporting under subpart Q, you must report CH4 and N2O emissions from flares according to the requirements in §98.33(c)(2) which employ Equation C-9a (not Y-4 and Y-5) and the emission factors for coke oven gas and blast furnace gas in Table C--2 to subpart C. |
(Equation Y-4) | |
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(Equation Y-5) | |
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The calculation spreadsheet will calculate the annual CO2 emissions from each catalytic cracking unit and fluid coking unit. The calculated value will be displayed in the red-bordered cell at the bottom of the spreadsheet. This value should be entered in e-GGRT and the Equation Y-9, Y-10 Calculation Spreadsheet for this flareunit.
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Using the Equation Y-8 Calculation Spreadsheet |
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The calculation spreadsheet will calculate the annual CH4 emissions from Storage storage tanks other than those processing unstabilized crude oil. The calculated value will be displayed in the red-bordered cell at the bottom of the spreadsheet. This value should be entered in e-GGRT for this unit.
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