U.S. Code of Federal Regulations
Regulations most recently checked for updates: May 28, 2020
(a) Use Method 9 of appendix A of this part to determine compliance with the opacity limitation.
(b) Conduct an initial test for opacity as specified in § 60.8.
(c) After the initial test for opacity, conduct annual tests no more than 12 calendar months following the date of your previous test.