Federal regulations · Through 2026-08-25 · Newer source version available

40 CFR 421.95: Pretreatment standards for existing sources.

Where this section sits in the code

Title 40—Protection of Environment
CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY
SUBCHAPTER N—EFFLUENT GUIDELINES AND STANDARDS
PART 421—NONFERROUS METALS MANUFACTURING POINT SOURCE CATEGORY
Subpart I—Metallurgical Acid Plants Subcategory

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 metallurgical acid plant blowdown introduced into a POTW shall not exceed the following values:

Subpart I—Metallurgical Acid Plant—PSES

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average

mg/kg (pound per/million pounds) of 100 pct sulfuric acid capacity

Cadmium 0.511 0.204

Zinc 2.605 1.073

Collected 2026-08-27T02:26:04Z. Source file · JSON

Browse this collection