§ 421.245 — 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 nickel process wastewater introduced into a POTW must not exceed the following values:

(a) Slag reclaim tailings.

PSES for the Secondary Nickel Subcategory

(b) Acid reclaim leaching filtrate.

PSES for the Secondary Nickel Subcategory

(c) Acid reclaim leaching belt filter backwash

PSES for the Secondary Nickel Subcategory