CFR > Title 40 - Protection of Environment > CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY > SUBCHAPTER N—EFFLUENT GUIDELINES AND STANDARDS (Parts 400–471) > PART 421—NONFERROUS METALS MANUFACTURING POINT SOURCE CATEGORY > SUBPART G—Primary Lead Subcategory (§421.70 to §421.77) > 421.75—Pretreatment standards for existing sources.

421.75—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 mut comply with 40 CFR part 403 and achieve the following pretreatment standards for existing sources. The mass of wastewater pollutants in primary lead process wastewater introduced into a POTW shall not exceed the following values:
(a) Subpart G—Sinter Plant Materials Handling Wet Air Pollution Control.
PSES
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kkg (pounds per billion pounds) of sinter production
Lead 100.800 46.800
Zinc 367.200 151.200
(b) Subpart G—Blast Furnace Wet Air Pollution Control.
PSES
Pollutant or polluntant property Maximum for any 1 day Maximum for monthly average
mg/kkg (pound per billion pounds) of blast furnance lead bullion produced
Lead .000 .000
Zinc .000 .000
(c) Subpart G—Blast Furnace Slag Granulation.
PSES
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kkg (pound per billion pounds) of blast furance lead bullion produced
Lead .000 .000
Zinc .000 .000
(d) Subpart G—Dross Reverberatory Slag Granulation.
PSES
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kkg (pounds per billion pounds) of slag, speiss, or matte granulated
Lead 1,612.000 748.400
Zinc 5,872.000 2,418.000
(e) Subpart G—Dross Reverberatory Furnance Wet Air Pollution Control.
PSES
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kkg (pounds per billion pounds) of dross reverberatory furnace production
Lead .000 .000
Zinc .000 .000
(f) Subpart G—Zinc Fuming Wet Air Pollution Control.
PSES
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kkg (pounds per billion pounds) of blast furnace lead bullion produced
Lead .000 .000
Zinc .000 .000
(g) Subpart G—Hard Lead Refining Slag Granulation.
PSES
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kkg (pounds per billion pounds) of hard lead produced
Lead .000 .000
Zinc .000 .000
(h) Subpart G—Hard Lead Refining Wet Air Pollution Control.
PSES
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kkg (pounds per billion pounds) of hard lead produced
Lead .000 .000
Zinc .000 .000
(i) Subpart G—Facility Washdown.
PSES
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kkg (pounds per billion pounds) of lead bullion produced.
Lead .000 .000
Zinc .000 .000
(j) Subpart G—Employee Handwash.
PSES
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kkg (pounds per billion pounds) of lead bullion produced
Lead .924 .429
Zinc 3.366 1.386
(k) Subpart G—Respirator Wash.
PSES
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kkg (pounds per billion pounds) of lead bullion produced
Lead 1.484 .689
Zinc 5.406 2.226
(l) Subpart G—Laundering of Uniforms.
PSES
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kkg (pounds per billion pounds) of lead bullion produced
Lead 4.340 2.015
Zinc 15.810 6.510