StacksVerified U.S. regulatory reference

40 CFR §421.322

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov
Except as provided in 40 CFR 125.30 through 125.32, any existing point source subject to this subpart shall achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best practiacable technology currently available:
  1. (a)Refinery sump filtrate.
  2. (b)Slag leach reslurry.
  3. (c)Solvent extraction raffinate filtrate.
  4. (d)Digestion wet air pollution control.
  5. (e)Evaporation and denitration wet air pollution control.
  6. (f)Hydrofluorination alkaline scrubber.
  7. (g)Hydrofluorination water scrubber.
  8. (h)Magnesium reduction and casting floor wash.
  9. (i)Laundry wastewater.