StacksVerified U.S. regulatory reference

40 CFR §421.21

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
For the purpose of this subpart:
  1. (a)Except as provided below, the general definitions, abbreviations and methods of analysis set forth in part 401 of this chapter, shall apply to this subpart.
  2. (b)The term product shall mean hot aluminum metal.
  3. (c)If a permittee chooses to analyze for benzo(a)pyrene using any EPA-approved method, any “non-detected” measurements shall be considered zeroes for the purpose of determining compliance with this regulation.