What types of particulate matter must be reported?

All forms of Particulate Matter (PM) shall be reported. Particulate Matter (PM) is all finely divided solid or liquid material, other than uncombined water, emitted to the ambient air, inclusive of all particle sizes capable of being airborne:

  • PM10 is the portion of PM with an aerodynamic diameter less than or equal to 10 micrometers
  • PM2.5 is the portion of PM that has an aerodynamic diameter less than or equal to 2.5 micrometers and is most health offensive
  • PM Condensable is material that is vapor phase at stack conditions, but which condenses and/or reacts upon cooling and dilution in the ambient air to form solid or liquid PM immediately after discharge from the stack
    • All PM condensable is assumed to be in the PM2.5 size fraction
    • All PM2.5 is also a part of the PM10 size fraction

All subsets of Particulate Matter (PM) shall be reported when applicable:

  • PM10-Primary (PM10-PRI)
  • PM10-Filterable (PM10-FIL)
  • PM25-Primary (PM25-PRI)
  • PM25-Filterable (PM25-FIL)
  • PM-Condensable (PM-CON)

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1. Who must submit an emissions inventory report?
2. Who submits the emissions inventory report for a source that changed ownership?
3. Do I need to submit an emissions inventory if I did not operate in the previous calendar year?
4. Do I need to submit an emissions inventory if my facility shut down its operations in the previous calendar year?
5. What if some of the information pertaining to my facility is confidential?
6. If my facility doesn't operate all four quarters, why do the seasonal throughput percentages have to sum to 100%?
7. Why are the months listed for Seasonal Operating Percentages December to February, March to May, June to August, and September to November instead of the typical quarterly segments?
8. What should peaking plants enter for start time, hours/day, and days/week?
9. What pollutants must be reported?
10. Are there activities that are exempt from the emissions inventory?
11. Am I required to report fugitive emissions at my facility?
12. Do emissions from light duty vehicles such as security vehicles need to be included in the calculation of fugitive emissions from haul roads?
13. How do I report metals (or metalloids) hazardous air pollutants (HAP) such as chromium?
14. Which compounds are considered volatile organic compounds (VOC)?
15. What compounds are considered glycol ethers?
16. How should facilities report emissions due to malfunctions or upsets?
17. Which emission factor should I use if different factors are listed for volatile organic compounds (VOC), total organic compounds (TOC), and non-methane TOC?
18. Should stack height be measured from the ground or the top of the building?
19. Is there guidance on the acceptable accuracy of stack parameters?
20. What types of particulate matter must be reported?
21. Which Particulate Matter (PM) emission factor should I use?
22. Who pays emissions inventory fees for a source that changed ownership?
23. Is there a fee associated with my Class II Inventory?