40 CFR § 421.196 Nonferrous Metals Manufacturing Point Source Category

§ 421.196 Pretreatment standards for new sources.

Current through Aug 22, 2025 · Read all of Part 421

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 propertyMaximum for any 1 dayMaximum for monthly average
mg/kg (pounds per million pounds) of indium metal produced
Cadimum2.1050.929
Lead2.6001.238
Zinc9.0373.776
Indium2.7241.114

(b) Spent Electrolyte.

PSNS for the Secondary Indium Subcategory

Pollutant or pollutant propertyMaximum for any 1 dayMaximum for monthly average
mg/kg (pounds per million pounds) of cathode indium produced
Cadmium12.1705.370
Lead15.0407.160
Zinc52.27021.840
Indium15.7506.444

← § 421.195 Pretreatment standards for existing sources.§ 421.197 [Reserved] →