StacksVerified U.S. regulatory reference

40 CFR §421.313

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 available technology economically achievable:
  1. (a)Tungsten detergent wash and rinse.
  2. (b)Tungsten leaching acid.
  3. (c)Tungsten post-leaching wash and rinse.
  4. (d)Synthetic scheelite filtrate.
  5. (e)Tungsten carbide leaching wet air pollution control.
  6. (f)Tungsten carbide wash water.
  7. (g)Cobalt sludge leaching wet air pollution control.
  8. (h)Crystallization decant.
  9. (i)Acid wash decant.
  10. (j)Cobalt hydroxide filtrate.
  11. (k)Cobalt hydroxide filter cake wash.