GroundRules
40 CFR 421.196: Pretreatment standards for new 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, any new 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 new sources. The mass of wastewater pollutants in secondary indium process wastewater introduced into a POTW should not exceed the following values:
(a) Displacement Supernatant.
PSNS 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
Cadimum 2.105 0.929
Lead 2.600 1.238
Zinc 9.037 3.776
Indium 2.724 1.114
(b) Spent Electrolyte.
PSNS 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