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Step 1. Step 1. Adding or Updating Flares Unit Information

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To delete an existing Flare Unit, click on the delete icon, which is the last column in the FLARES UNIT-LEVEL EMISSIONS SUMMARY table.

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To add or update Subpart Y flare emissions information, locate the FLARES UNIT-LEVEL EMISSION SUMMARY table on the Subpart Y Overview page, and click OPEN.

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Step 2b: Equation Summary and Results

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For each flare at your facility, Subpart Y requires you to enter the following emissions information:

• Wiki MarkupThe annual CO{~}2~ ₂ emissions from flare unit operations (the output of Equation Y-1a, Y-1b, Y-2, or Y-3 depending on the calculation method used for this flare, in metric tons) \ [98.256(e)(4)\]unmigrated-wiki-markup
• The annual CH{~}4~ ₄ emissions from flare unit operations (the output of Equation Y-4, in metric tons) \ [98.256(e)(4)\]
• The basis for the fraction of carbon in the flare gas contributed by methane value:
  • 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
  • Engineering calculations
  • Other (specify)
  unmigrated-wiki-markup
• The annual N{~}₂{~}O emissions from flare unit operations (the output of Equation Y-5, in metric tons) \ [98.256(e)(4)\]

To calculate annual CO₂ emissions, download the associated calculation spreadsheet by clicking the link titled "Use Y-x spreadsheet to calculate" (where 'x' represents 1a, 1b, 2, or 3 depending on the CO₂ calculation method used for this flare). Fill in the spreadsheet using the instructions in the spreadsheet. After completing the spreadsheet, upload the file using by clicking the browse button, selecting the file from the appropriate directory, and clicking the blue UPLOAD button.

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For each flare using the Equation Y-1a calculation method, Subpart Y requires you to enter the following supplemental emissions information:

• Wiki MarkupAn indication of whether daily or weekly measurement periods are used \ [98.256(e)(6)\]
• Wiki MarkupThe annual volume of flare gas combusted (in scf) \ [98.256(e)(6)\]
• Wiki MarkupThe 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
• Wiki MarkupThe annual average molecular weight (in kg/kg-mole) \ [98.256(e)(6)\] Wiki Markup
• The method used to measure molecular weight \ [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 molecular weight
• Wiki MarkupThe annual average carbon content of the flare gas (kg carbon/kg flare gas) \ [98.256(e)(6)\]unmigrated-wiki-markup
• The method used to measure carbon content \ [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 carbon content

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For each flare using the Equation Y-1b calculation method, Subpart Y requires you to enter the following supplemental emissions information:

• Wiki MarkupAn indication of whether daily or weekly measurement periods are used \ [98.256(e)(7)\]unmigrated-wiki-markup
• The annual volume of flare gas combusted (in scf) \ [98.256(e)(7)\]
• Wiki MarkupThe 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
• Wiki MarkupThe annual average CO{~}2~ ₂ concentration (in percent by volume or mole) \ [98.256(e)(7)\] Wiki Markup
• The method used to measure CO{~}2~ concentration \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:unmigrated-wiki-markup
• The annual average concentration of the compound (in percent by volume or mole) \ [98.256(e)(7)\(i)\]unmigrated-wiki-markup
• 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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To add a non-CO₂ carbon-contain compound for the flare, click the "ADD a Compound" link in the CARBON CONTAINING COMPOUNDS (OTHER THAN CO2) IN THE FLARE GAS STREAM section on the Equation Summary and Result page and enter the required information.

When finished entering the required compound information, click SAVE.

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For each flare using the Equation Y-2 calculation method, Subpart Y requires you to enter the following supplemental emissions information:

• Wiki MarkupAn indication of whether daily or weekly measurement periods are used \ [98.256(e)(8)\]unmigrated-wiki-markup
• The annual volume of flare gas combusted (in MMscf) \ [98.256(e)(8)\]unmigrated-wiki-markup
• 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
• Wiki MarkupThe annual average higher heating value of the flare gas (MMBtu/MMscf) \ [98.256(e)(8)\] Wiki Markup
• The method used to measure higher heating value of the flare gas \ [98.256(q)\]
  • ASTM D4809-06
  • ASTM D240-02 (Reapproved 2007)
  • ASTM D1826-94 (Reapproved 2003)
  • ASTM D3588-98 (Reapproved 2003)
  • ASTM D4891-89 (Reapproved 2006)
  • Chromatographic analysis: manufacturer's instructions
  • Other (specify)
• The number of days during the reporting year missing data procedures were used to determine the higher heating value of the flare gasunmigrated-wiki-markup
• An indication of whether the annual volume of flare gas combusted was determined using standard conditions of 68 ºF and 14.7 psia or 60 ºF and 14.7 psia \ [98.256(e)(8)\]unmigrated-wiki-markup
• An indication of whether the annual average higher heating value of the flare gas was determined using standard conditions of 68 ºF and 14.7 psia or 60 ºF and 14.7 psia \ [98.256(e)(8)\]

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For each flare using the Equation Y-3 calculation method, Subpart Y requires you to enter the following supplemental emissions information:

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• The total number of start-up, shutdown, or malfunction (SSM) events exceeding 500,000 scf/day \ [98.256(e)(9)\]

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For each flare using the ARB 95113(d) - Start-up, Shutdown, Malfunction Equation calculation method, use the SSM equation Calculation Spreadsheet to calculate the result. Upload the completed XML exported from the spreadsheet by clicking the browse button, selecting the XML file from the appropriate directory, and clicking the blue UPLOAD button.

Subpart Y requires you to enter the following supplemental emissions information:

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• The total number of start-up, shutdown, or malfunction (SSM) events exceeding 500,000 scf/day \ [98.256(e)(9)\]
• Basis for the fraction of carbon in the flare gas contributed by methanecontributed by methane

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Step 2d: Save Your Data

When you have finished entering emission results, click SAVE.

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