StacksVerified U.S. regulatory reference

40 CFR §420.06

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
Removal allowances pursuant to 40 CFR 403.7(a)(1) may be granted for phenols (4AAP) limited in 40 CFR part 420 when used as an indicator or surrogate pollutant.