§ 421.315 — Pretreatment Standards For Existing Sources

Except as provided in 40 CFR 403.7, any existing source subject to this subpart which introduces polutants 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 secondary tungsten and cobalt process wastewater introduced into a POTW shall not exceed the following values:

(a) Tungsten detergent wash and rinse.

PSES for the Secondary Tungsten and Cobalt Subcategory

(b) Tungsten leaching acid.

PSES for the Secondary Tungsten and Cobalt Subcategory

(c) Tungsten post-leaching wash and rinse.

PSES for the Secondary Tungsten and Cobalt Subcategory

(d) Synthetic scheelite filtrate.

PSES for the Secondary Tungsten and Cobalt Subcategory

(e) Tungsten carbide leaching wet air pollution control.

PSES for the Secondary Tungsten and Cobalt Subcategory

(f) Tungsten carbide wash water.

PSES for the Secondary Tungsten and Cobalt Subcategory

(g) Cobalt sludge leaching wet air pollution control.

PSES for the Secondary Tungsten and Cobalt Subcategory

(h) Crystallization decant.

PSES for the Secondary Tungsten and Cobalt Subcategory

(i) Acid wash decant.

PSES for the Secondary Tungsten and Cobalt Subcategory

(j) Cobalt hydroxide filtrate.

PSES for the Secondary Tungsten and Cobalt Subcategory

(k) Cobalt hydroxide filter cake wash.

PSES for the Secondary Tungsten and Cobalt Subcategory