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40 C.F.R. § 421.115

Pretreatment standards for existing sources.

§ 421.115 Pretreatment standards for existing sources.

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 columbium-tantalum process wastewater introduced into a POTW shall not exceed the following values:

(a) Subpart K—Concentrate Digestion Wet Air Pollution Control.

PSES

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of concentrate digested
Lead.174.081
Zinc.635.261
Ammonia (as N)82.91036.450
Fluoride21.77012.440

(b) Subpart K—Solvent Extraction Raffinate.

PSES

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