StacksVerified U.S. regulatory reference

40 CFR §440.40

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
The provisions of subpart D are applicable to discharges from (a) mines, either open-pit or underground, that produce mercury ores; and (b) mills beneficiating mercury ores by gravity separation methods or by froth-flotation methods.