U.S. Code of Federal Regulations
Regulations most recently checked for updates: Jan 21, 2026
(a) Within 180 days after your final compliance date in table 1 of this subpart, you must meet the two limitations specified in paragraphs (a)(1) and (2) of this section.
(1) The opacity limitation is 10 percent (6-minute average), except as described in paragraph (a)(2) of this section.
(2) The opacity limitation is 35 percent (6-minute average) during the startup period that is within the first 30 minutes of operation.
(b) The limitations in paragraph (a) of this section apply at all times.
