CFR / Title 40 / Part 421 / Sec. 421.196 Pretreatment standards for new sources.

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------------------------------------------------------------------------

Maximum for

Pollutant or pollutant property Maximum for monthly

any 1 day average------------------------------------------------------------------------

mg/kg (pounds per million

pounds) of indium metal

produced

---------------Cadimum..................................... 2.105 0.929Lead........................................ 2.600 1.238Zinc........................................ 9.037 3.776Indium...................................... 2.724 1.114------------------------------------------------------------------------

(b) Spent Electrolyte.