StacksVerified U.S. regulatory reference

40 CFR §60.2971

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
  1. (a)Within 60 days after your air curtain incinerator reaches the charge rate at which it will operate, but no later than 180 days after its initial startup, you must meet the two limitations specified in paragraphs (a)(1) and (2) of this section.
    1. (1)The opacity limitation is 10 percent (6-minute average), except as described in paragraph (a)(2) of this section.
    2. (2)The opacity limitation is 35 percent (6-minute average) during the startup period that is within the first 30 minutes of operation.
  2. (b)The limitations in paragraph (a) of this section apply at all times.