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
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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
- Equation Y-19 (Process Vent)
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When you are finished, click SAVE.
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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 “Use Y-14 spreadsheet to calculate" calculate” for CO2 or "Use “Use Y-15 spreadsheet to calculate" 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 “Annual CO2 emission from this asphalt blowing unit (metric tons)" ” or "Annual “Annual CH4 emission from this asphalt blowing unit (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.
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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 “Use Y-16a spreadsheet to calculate" calculate” for CO2 or "Use “Use Y-17 spreadsheet to calculate" 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 “Annual CO2 emission from this asphalt blowing unit (metric tons)" ” or "Annual “Annual CH4 emission from this asphalt blowing unit (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.
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Step 1c: Equation Y-16b/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 “Use Y-16b spreadsheet to calculate" calculate” for CO2 or "Use “Use Y-17 spreadsheet to calculate" 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 “Annual CO2 emission from this asphalt blowing unit (metric tons)" ” or "Annual “Annual CH4 emission from this asphalt blowing unit (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.
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Step 1d: Equation Y-19 (Process Vent) 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 “Use Y-19 spreadsheet to calculate"calculate”. Fill in the spreadsheet using the instructions in the spreadsheet. After completing the spreadsheet, copy the values of CO2 and CH4 calculated by the spreadsheet to this page in the box next to "Annual “Annual CO2 emission from this process vent (metric tons)" or "Annual “Annual CH4 emission from this process vent (metric tons)" as appropriate.
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