Cal e-GGRT Help

Subpart Y Asphalt Blowing Unit Information

Note: The Cal e-GGRT help system includes general instruction on using the California GHG reporting tool. However, the help system may not explain differences between California and U.S. EPA reporting requirements. Please refer to the ARB reporting website for California-specific reporting requirements and additional help.

Created by Tom Littell, last modified by Timothy Kidman on Feb 23, 2012

This topic provides a step-by-step description of how to enter Subpart Y Asphalt Blowing unit information about this facility

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Adding or Updating Asphalt Blowing Information

To add or update Subpart Y Asphalt Blowing Information for this Facility, locate the ASPHALT BLOWING UNIT-LEVEL EMISSIONS SUMMARY table on the Subpart Y Overview page.

Click the link titled "ADD an Asphalt Blowing Unit."

To edit an existing Asphalt Blowing Unit, click on the edit icon or the Name/ID link, which is the first column in the ASPHALT BLOWING UNIT-LEVEL EMISSIONS SUMMARY table.

To delete an existing Asphalt Blowing Unit, click on the delete icon, which is the last column in the ASPHALT BLOWING UNIT-LEVEL EMISSIONS SUMMARY table.

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Subpart Y requires you to report the following data about your asphalt blowing operations:

A unique name or identifier, plus optional description for this asphalt blowing unit. See also About Unique Unit Names.
Specify the control device used to reduce methane (and other organic) emissions from the unit. Select from Vapor scrubber, Thermal oxidizer, Flare, Other (specify), or None.

When you are finished, click SAVE.

If you selected Thermal oxidizer, Flare, or Other, an additional question will appear requiring you to select a CO₂ AND CH₄ EMISSIONS CALCULATION METHOD. The system requires you to select the method used to calculate the CO₂ and CH₄ emissions for your asphalt blowing operations from the following list:

Equations Y-14 and Y-15 (appears only if Other was selected)
Equations Y-16a and Y-17
Equations Y-16b and Y-17.

When you are finished, click SAVE.

Note: if you selected Vapor scrubber or None as the asphalt blowing operations control device, you must use Equations Y-14 and Y-15, so no options are provided

Adding or Updating Asphalt Blowing Emissions Information

This page provides a step-by-step description of how to enter Subpart Y Asphalt Blowing emissions information.

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To add or update emissions for your asphalt blowing unit, locate the ASPHALT BLOWING UNIT-LEVEL EMISSION SUMMARY table on the Subpart Y Overview page, and click OPEN.

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For asphalt blowing operations, you must calculate CO₂ and CH₄ emissions.

The emissions entry screen presented will be dependent on the type of control device selected and, if necessary, the calculation method selected.

Step 1: Asphalt Blowing Operations Emissions Summary and Result

If Equation Y-14 and Y-15 is required or chosen, then you will be prompted with the Equation Y-14/Y-15 Summary and Result page.

If Equation Y-16a is chosen then you will be prompted with the Equation Y-16a/Y-17 Summary and Result page.

If Equation Y-16b is chosen then you will be prompted with the Equation Y-16b/Y-17 Summary and Result page.

Data entry instructions for each of these pages follow:

Step 1a: Equation Y-14/Y-15 Summary and Result

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The annual CO₂ and CH₄ emissions from asphalt blowing operations are required. To calculate this value download the appropriate spreadsheet by clicking the link titled “Use Y-14 spreadsheet to calculate” for CO₂ or “Use Y-15 spreadsheet to calculate” for CH₄. Fill in the spreadsheet using the instructions in the spreadsheet. After completing each respective spreadsheet, copy the values of CO₂ and CH₄ calculated by the spreadsheet to this page in the box next to “Annual CO₂ emissions from asphalt blowing (metric tons)” or “Annual CH₄ emissions from asphalt blowing (metric tons),” as appropriate.

The Equation Y-14/Y-15 Summaries are presented on the page. You can hover over an element in the equation to reveal a definition of that element.

Both the CO₂ and CH₄ emission factors require a basis:

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

Note: If using the process vent method for an asphalt blowing unit, enter your CO₂ and CH₄ emissions on this page. For the entries regarding the emissions factor basis used, choose "Other" and add "Process Vent Method" to the text box that appears.

Step 1b: Equation Y-16a / Y-17 Summary and Result

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The annual CO₂ and CH₄ emissions from asphalt blowing operations are required. To calculate this value download the appropriate spreadsheet by clicking the link titled “Use Y-16a spreadsheet to calculate” for CO₂ or “Use Y-17 spreadsheet to calculate” for CH₄. Fill in the spreadsheet using the instructions in the spreadsheet. After completing each respective spreadsheet, copy the values of CO₂ and CH₄ calculated by the spreadsheet to this page in the box next to “Annual CO₂ emissions from asphalt blowing (metric tons)” or “Annual CH₄ emissions from asphalt blowing (metric tons),” as appropriate.

The Equation Y-16a/Y-17 Summaries are presented on the page. You can hover over an element in the equation to reveal a definition of that element.

Both the CO₂ and CH₄ emission factors require a basis:

Used default 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 1c: Equation Y-16b/Y-17 Summary and Result

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The annual CO₂ and CH₄ emissions from asphalt blowing operations required. To calculate this value download the appropriate spreadsheet by clicking the link titled “Use Y-16b spreadsheet to calculate” for CO₂ or “Use Y-17 spreadsheet to calculate” for CH₄. Fill in the spreadsheet using the instructions in the spreadsheet. After completing each respective spreadsheet, copy the value of CO₂ and CH₄ calculated by the spreadsheet to this page in the box next to “Annual CO₂ emissions from asphalt blowing (metric tons)” or “Annual CH₄ emissions from asphalt blowing (metric tons),” as appropriate.

The Equation Y-16b/Y-17 Summaries are presented on the page. You can hover over an element in the equation to reveal a definition of that element.

Both the CO₂ and CH₄ emission factors require a basis:

Used default 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 2: Save Your Data

When you have finished entering Asphalt Blowing Operations Emissions Summary and Result, 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 and CH₄ emissions, rounded to the nearest metric ton. The value displayed is for informational purposes only.

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Adding or Updating Asphalt Blowing Information

Adding or Updating Asphalt Blowing Emissions Information

Step 1: Asphalt Blowing Operations Emissions Summary and Result

Step 1a: Equation Y-14/Y-15 Summary and Result

Step 1b: Equation Y-16a / Y-17 Summary and Result

Step 1c: Equation Y-16b/Y-17 Summary and Result

Step 2: Save Your Data

See Also