This topic provides a step-by-step description of how to enter Subpart Y Coke Calcining unit information about this facility.

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Adding or Updating Coke Calcining Unit Information

To add or update Subpart Y Coke Calcining Unit Information for this Facility, locate the COKE CALCINING UNIT-LEVEL EMISSIONS SUMMARY table on the Subpart Y Overview page.

Click the link titled "ADD a Coke Calcining Unit."

To edit an existing Coke Calcining Unit, click on the edit icon or the Name/ID link, which is the first column in the COKE CALCINING UNIT-LEVEL EMISSIONS SUMMARY table.

To delete an existing Coke Calcining Unit, click on the delete icon, which is the last column in the COKE CALCINING UNIT-LEVEL EMISSIONS SUMMARY table.

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Subpart Y requires you to report the following data about your coke calcining unit:

• A unique name or identifier, plus optional description for this coke calcining unit. See also About Unique Unit Names
• For each unit, answer the following question: “Do you operate and maintain a Continuous Emissions Monitoring System (CEMS) that measures CO₂ emissions according to subpart C? This means you have both a flow meter and a concentration monitor installed. If so, you must use the CEMS methodology. Click either Yes or No.

When you are finished, click NEXT.

If you selected Yes for using a CEMS, Subpart Y collects the maximum rated throughput of the coke calcining unit (metric tons coke calcined per stream day)

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If you select No for using a CEMS,

Subpart Y collects the following data about your coke calcining unit:

• Maximum rated throughput of the coke calcining unit (metric tons coke calcined per stream day)
• Method used to calculate the CH₄ emissions:
  • Equation Y-9
  • Unit-specific measurement data
  • A unit-specific emission factor based on a source test of the unit
• Method used to calculate the N₂O emissions:
  • Equation Y-10
  • Unit-specific measurement data
  • A unit-specific emission factor based on a source test of the unit

When you are finished, click SAVE.

Adding or Updating Coke Calcining Emissions Information

The following provides a step-by-step description of how to enter Subpart Y Coke Calcining emissions information.

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To add or update CO₂ emissions information for a coke calcining unit that is monitored by CEMS, please refer to the Subpart Y Emissions Information for Process Units Monitored by CEMS help page (CH₄ and N₂O emissions information for coke calcining units that are monitored by CEMS are reported separately per the instructions below).

To add or update CO₂, CH₄, and N₂O emissions information for a coke calcining unit that is NOT monitored by CEMS OR CH₄ and N₂O emissions information for a coke calcining unit that is monitored by CEMS, locate the COKE CALCINING UNIT-LEVEL EMISSION SUMMARY table on the Subpart Y Overview page, and click OPEN.

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Step 1. CO₂ Emissions: Equation Y-13 Summary and Result (for Units NOT Monitored by CEMS)

Step 1 does not apply to units monitored by CEMS. If you are reporting for a unit monitored by CEMS, please skip to Step 2a.

The annual CO₂ emissions from coke calcining operations is required. To calculate this value download the spreadsheet by clicking the link titled “Use Y-13 spreadsheet to calculate.” Fill in the spreadsheet using the instructions in the spreadsheet. After completing each respective spreadsheet, copy the value of CO₂ calculated by the spreadsheet to this page in the box next to “Annual CO₂ emission from this coke calcining unit (metric tons).”

The Equation Y-13 Summary is presented on the page. You can hover over an element in the equation to reveal a definition of that element.

Subpart Y requires the following additional data:

• Method used to measure the annual carbon content of green coke fed to the unit:
  • ASTM D3176-89-Reapproved 2002
  • ASTM D5291-02-Reapproved 2007
  • ASTM D5373-08
  • Other (specify)
• Method used to measure the annual carbon content of marketable coke produced:
  • ASTM D3176-89-Reapproved 2002
  • ASTM D5291-02-Reapproved 2007
  • ASTM D5373-08.
  • Other (specify)
• Description of coke dust recycling for the unit:
  • All dust is recycled
  • A portion of the dust is recycled
  • None of the dust is recycled

Step 2. CH₄ and N₂O Emissions

Depending on the method selected to calculate the CH₄ and N₂O emissions for coke calcining units, some combination of the screens presented below (Steps 2a, 2b and 2c) will collect CH₄ and N₂O emissions.

Step 2a: Equation Y-9/Y-10 Summary and Result

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The annual CH₄ and N₂O emissions from coke calcining operations are required. To calculate these values download the appropriate spreadsheet by clicking the link titled “Use Y-9 spreadsheet to calculate” for CH₄ or “Use Y-10 spreadsheet to calculate” for N₂O. Fill in the spreadsheet using the instructions in the spreadsheet. After completing each respective spreadsheet, copy the value of CH₄ and N₂O calculated by the spreadsheet to this page in the box next to “Annual CH₄ emission from this coke calcining unit (metric tons)” or “Annual N₂O emission from this coke calcining unit (metric tons),” as appropriate.

The Equation Y-9/Y-10 Summaries are presented on the page. You can hover over an element in the equation to reveal a definition of that element.

Step 2b: Unit-specific Measurement Result

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The annual CH₄ and N₂O emissions from coke calcining operations are required. Enter the value of CH₄ and N₂O in this page in the box next to “Annual CH₄ emission from this coke calcining unit (metric tons)” or “Annual N₂O emission from this coke calcining unit (metric tons),” as appropriate.

Step 2c: Unit-specific Emission Factor Based on a Source Test Result

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The annual CH₄ and N₂O emissions from coke calcining operations are required. Enter the value of CH₄ and N₂O in this page in the box next to “Annual CH₄ emission from this coke calcining unit (metric tons)” or “Annual N₂O emission from this coke calcining unit (metric tons),” as appropriate.

Both CH₄ and N₂O emissions include the basis for the emission factor:

• Weekly or more frequent measurements
• Periodic (less frequent than weekly) measurements
• Average of multiple source tests
• One-time source test
• Other (specify)

Step 3: Save Your Data

When you have finished entering emission results, click SAVE.

After you save the data on this page, the next time you open the page, the calculators 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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See Also

Screen Errors
Using e-GGRT to Prepare Your Subpart Y Report
Subpart Y Summary Information for this Facility
Subpart Y Delayed Coking Unit Information
Subpart Y Asphalt Blowing Unit Information
Subpart Y Coke Calcining Unit Information
Subpart Y Catalytic Cracking, Fluid Coking, and Catalytic Reforming Unit Information
Subpart Y Flares Unit Information
Subpart Y Process Vents Unit Information
Subpart Y Sulfur Recovery Plant Information
Subpart Y Emissions Information for Process Units Monitored by CEMS
Subpart Validation Report