Regulations last checked for updates: May 01, 2025

Title 40 - Protection of Environment last revised: Nov 01, 2025
Appendix -

As stated in § 63.7825(x), you must demonstrate compliance with each polycyclic aromatic hydrocarbon emission limit that applies to you by calculating the sum of the emissions of each polycyclic aromatic hydrocarbon in the following table:

Pollutant name CAS No.
Acenaphthene83-32-9
Acenaphthylene208-96-8
Anthracene120-12-7
Benz[a]anthracene56-55-3
Benzo[a]pyrene50-32-8
Benzo[b]fluoranthene205-99-2
Benzo[g,h,i]perylene191-24-2
Benzo[k]fluoranthene207-08-9
Chrysene218-01-9
Dibenz[a,h]anthracene53-70-3
Fluoranthene206-44-0
Fluorene86-73-7
Indeno (1,2,3-cd) pyrene193-39-5
Naphthalene91-20-3
Phenanthrene85-01-8
Perylene198-55-0
Pyrene129-00-0
[89 FR 23335, Apr. 3, 2024]
authority: 42 U.S.C. 7401
source: 57 FR 61992, Dec. 29, 1992, unless otherwise noted.