StacksVerified U.S. regulatory reference

40 CFR §421.276

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
Except as provided in 40 CFR 403.7, any new source subject to this subpart which introduces pollutants into a publicly owned treatment works must comply with 40 CFR part 403 and achieve the following pretreatment standards for new sources. The mass of wastewater pollutants in primary rare earth metals process wastewater introduced into a POTW shall not exceed the following values:
  1. (a)Dryer vent water quench and scrubber.
  2. (b)Dryer vent caustic wet air pollution control.
  3. (c)Electrolytic cell water quench and scrubber.
  4. (d)Electrolytic cell caustic wet air pollution control.
  5. (e)Sodium hypochlorite filter backwash.