GroundRules
40 CFR 421.195: Pretreatment standards for existing sources.
Where this section sits in the code
- Title 40—Protection of Environment
- CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY
- SUBCHAPTER N—EFFLUENT GUIDELINES AND STANDARDS
- PART 421—NONFERROUS METALS MANUFACTURING POINT SOURCE CATEGORY
- Subpart Q—Secondary Indium Subcategory
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 secondary indium process wastewater introduced into a POTW must not exceed the following values:
(a) Displacement Supernatant.
PSES for the Secondary Indium Subcategory
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of indium metal produced
Cadmium 2.105 0.929
Lead 2.600 1.238
Zinc 9.037 3.776
Indium 2.724 1.114
(b) Spent Electrolyte.
PSES for the Secondary Indium Subcategory
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of cathode indium produced
Cadmium 12.170 5.370
Lead 15.040 7.160
Zinc 52.270 21.840
Indium 15.750 6.444
Collected 2026-08-27T02:26:04Z. Source file · JSON