StacksVerified U.S. regulatory reference

40 CFR §421.334

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
Any new source subject to this subpart shall achieve the following new source performance standards:
  1. (a)Sand drying wet air pollution control.
  2. (b)Sand chlorination off-gas wet air pollution control.
  3. (c)Sand chlorination area-vent wet air pollution control.
  4. (d)SiC14 purification wet air pollution control.
  5. (e)Feed makeup wet air pollution control.
  6. (f)Iron extraction (MIBK) steam stripper bottoms.
  7. (g)Zirconium filtrate.
  8. (h)Hafnium filtrate.
  9. (i)Calcining caustic wet air pollution control.
  10. (j)Pure chlorination wet air pollution control.
  11. (k)Reduction area-vent wet air pollution control.
  12. (l)Magnesium recovery off-gas wet air pollution control.
  13. (m)Magnesium recovery area-vent wet air pollution control.
  14. (n)Zirconium chip crushing west air pollution control.
  15. (o)Acid leachate from zirconium metal production.
  16. (p)Acid leachate from zirconium alloy production.
  17. (q)Leaching rinse water from zirconium metal production.
  18. (r)Leaching rinse water from zirconium alloy production.