StacksVerified U.S. regulatory reference

40 CFR §421.185

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
Except as provided in 40 CFR 403.7 and 403.13, any existing 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 existing sources. The mass of wastewater pollutants in primary and secondary germanium and gallium process wastewater introduced into a POTW must not exceed the following values:
  1. (a)Still liquor.
  2. (b)Chlorinator wet air pollution control.
  3. (c)Germanium hydrolysis filtrate.
  4. (d)Acid wash and rinse water.
  5. (e)Gallium hydrolysis filtrate.
  6. (f)Solvent extraction raffinate.