§ 421.256 — 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 primary precious metals and mercury process wastewater introduced into a POTW shall not exceed the following values:

(a) Smelter wet air pollution control.

PSNS for the Primary Precious Metals and Mercury Subcategory

(b) Silver chloride reduction spent solution.

PSNS for the Primary Precious Metals and Mercury Subcategory

(c) Electrolytic cells wet air pollution control.

PSNS for the Primary Precious Metals and Mercury Subcategory

(d) Electrolyte preparation wet air pollution control.

PSNS for the Primary Precious Metals and Mercury Subcategory

(e) Calciner wet air pollution control.

PSNS for the Primary Precious Metals and Mercury Subcategory

(f) Calcine quench water.

PSNS for the Primary Precious Metals and Mercury Subcategory

(g) Calciner stack gas contact cooling water.

PSNS for the Primary Precious Metals and Mercury Subcategory

(h) Condenser blowdown.

PSNS for the Primary Precious Metals and Mercury Subcategory

(i) Mercury cleaning bath water.

PSNS for the Primary Precious Metals and Mercury Subcategory