§ 421.265 — 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 secondary precious metals process wastewater introduced into a POTW must not exceed the following values:

(a) Furnace wet air pollution control.

PSES for the Secondary Precious Metals Subcategory

(b) Raw material granulation.

PSES for the Secondary Precious Metals Subcategory

(c) Spent plating solutions.

PSES for the Secondary Precious Metals Subcategory

(d) Spent Cyanide stripping solutions.

PSES for the Secondary Precious Metals Subcategory

(e) Refinery wet air pollution control.

1

1 This allowance applies to either acid or alkaline wet air pollution control scrubbers. If both acid and alkaline wet air pollution control scrubbers are present in a particular facility the same allowance applies to each.

PSES for the Secondary Precious Metals Subcategory

(f) Gold solvent extraction raffinate and wash water.

PSES for the Secondary Precious Metals Subcategory

(g) Gold spent electrolyte.

PSES for the Secondary Precious Metals Subcategory

(h) Gold precipitation and filtration.

PSES for the Secondary Precious Metals Subcategory

(i) Platinum precipitation and filtration.

PSES for the Secondary Precious Metals Subcategory

(j) Palladium precipitation and filtration.

PSES for the Secondary Precious Metals Subcategory

(k) Other platinum group metals precipitation and filtration.

PSES for the Secondary Precious Metals Subcategory

(l) Spent solution from PGC salt production.

PSES for the Secondary Precious Metals Subcategory

(m) Equipment and floor wash.

PSES for the Secondary Precious Metals Subcategory

(n) Preliminary Treatment.

PSES for the Secondary Precious Metals Subcategory