StacksVerified U.S. regulatory reference

40 CFR §60.2255

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
  1. (a)Use Method 9 of appendix A of this part to determine compliance with the opacity limitation.
  2. (b)Conduct an initial test for opacity as specified in § 60.8.
  3. (c)After the initial test for opacity, conduct annual tests no more than 12 calendar months following the date of your previous test.