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To add or update Subpart Y Flares Unit Information for this Facility, locate the FLARES UNIT-LEVEL UNITS EMISSIONS SUMMARY table on the Subpart Y Overview page, click the link titled "ADD a Flare."
To edit an existing Flare Unit, click on the edit icon or the Name/ID link, which is the first column in the FLARES UNIT-LEVEL UNITS EMISSIONS SUMMARY table.
To delete an existing Flare Unit, click on the delete icon, which is the last column in the FLARES UNIT-LEVEL UNITS EMISSIONS SUMMARY table.
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Subpart Y collects the following data about your flare unit: - A unique name or identifier, plus optional description for this flare unit (see also About Unique Unit Names)
- Type of flare:
- Steam assisted
- Air assisted
- Unassisted
- Other (specify)
- Flare service type:
- General facility flare
- Unit flare
- Emergency only flare
- Back-up flare
- Other (specify)
- Method used to calculate the CO2 emissions:
- 98.253(b)(1)(ii)(A) – Equation Y-1a Gas Composition Monitored (Equation Y-1a or Y-1b must be used if you have a continuous gas composition monitor on the flare or if you measure it at least weekly)
- 98.253(b)(1)(ii)(A) – Equation Y-1b Gas Composition Monitored (Equation Y-1a or Y-1b must be used if you have a continuous gas composition monitor on the flare or if you measure it at least weekly)
- 98.253(b)(1)(ii)(B) – Equation Y-2 Heat Content Monitored (Equation Y-2 must be used if you have a continuous higher heating value monitor or measure it at least weekly and the heating value monitor or measurement is not based on compositional analyses; if compositional analyses are used, you must use Equations Equation Y-1a or Y-1b)
- 98.253(b)(1)(iiiii) – Equation Y-3 Start-up, Shutdown, Malfunction (Equation Y-3 must be used if you do not measure gas composition or heating value at least weekly.)
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To add or update Subpart Y flare emissions information, locate the FLARES UNIT-LEVEL UNITS EMISSION SUMMARY table on the Subpart Y Overview page, and click OPEN.
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An indication of whether daily or weekly measurement periods are used \[98.256(e)(7)\] |
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The annual volume of flare gas combusted (in scf) \[98.256(e)(7)\] |
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The specific consensus-based standard method number or description of the procedure specified by the flow meter manufacturer \[98.256(q)\] |
- The number of days during the reporting year missing data procedures were used to determine the volume of flare gas combusted
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The annual average CO{~}2~ concentration (in percent by volume or mole) \[98.256(e)(7)\] |
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The method used to measure CO{~}2~ concentration \[98.256(q)\] |
- Method 18 at 40 CFR part 60, appendix A-6
- ASTM D1945-03
- ASTM D1946-90 (Reapproved 2006)
- GPA 2261-00
- UOP539-97
- ASTM D2503-92 (Reapproved 2007)
- Chromatographic analysis: manufacturer's instructions
- Other (specify)
- The number of days during the reporting year missing data procedures were used to determine CO2 concentration
- For each carbon containing compound other than CO2 in the flare gas stream identified by the facility, and for each flare using the Equation Y-1b, the system shall require the facility to identify:
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The annual average concentration of the compound (in percent by volume or mole) \[98.256(e)(7)\(i)\] |
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The method used to measure concentration of the compound \[98.256(q)\] |
- Method 18 at 40 CFR part 60, appendix A-6
- ASTM D1945-03
- ASTM D1946-90 (Reapproved 2006)
- GPA 2261-00
- UOP539-97
- ASTM D2503-92 (Reapproved 2007)
- Chromatographic analysis: manufacturer's instructions
- Other (specify)
- The number of days during the reporting year missing data procedures were used to determine the concentration of the compound
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After you save the data on this page, the next time you open the page, the calculator on the top of the page will display the CO2, CH4, and N2O emissions, rounded to the nearest 0.1, 0.01, and 0.001 of a metric ton, respectively. The value displayed is for informational purposes only.
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