GroundRules
40 CFR 421.74: Standards of performance for new 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 G—Primary Lead Subcategory
Any new source subject to this subpart must achieve the following performance standards:
(a) Subpart G—Sinter Plant Materials Handling Wet Air Pollution Control.
NSPS
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kkg (pounds per billion pounds) of sinter production
Lead .000 .000
Zinc .000 .000
Total suspended solids .000 .000
pH (1) (1)
1 Within the range of 7.5 to 10.0 at all times.
(b) Subpart G—Blast Furnace Wet Air Pollution Control.
NSPS
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
Total suspended solids .000 .000
pH (1) (1)
1 Within the range of 7.5 to 10.0 at all times.
(c) Subpart G—Blast Furnace Slag Granulation.
NSPS
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kkg (pounds per billion pounds) of blast furnance lead bullion produced
Lead .000 .000
Zinc .000 .000
Total suspended solids .000 .000
pH (1) (1)
1 Within the range of 7.5 to 10.0 at all times.
(d) Subpart G—Dross Reverberatory Slag Granulation.
NSPS
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 .000 .000
Zinc .000 .000
Total suspended solids .000 .000
pH (1) (1)
1 Within the range of 7.5 to 10.0 at all times.
(e) Subpart G—Dross Reverberatory Furnace Wet Air Pollution Control.
NSPS
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
Total suspended solids .000 .000
pH (1) (1)
1 Within the range of 7.5 to 10.0 at all times.
(f) Subpart G—Zinc Fuming Wet Air Pollution Control.
NSPS
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
Total suspended solids .000 .000
pH (1) (1)
1 Within the range of 7.5 to 10.0 at all times.
(g) Subpart G—Hard Lead Refining Slag Granulation.
NSPS
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
Total suspended solids .000 .000
pH (1) (1)
1 Within the range of 7.5 to 10.0 at all times.
(h) Subpart G—Hard Lead Refining Wet Air Pollution Control.
NSPS
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
Total suspended solids .000 .000
pH (1) (1)
1 Within the range of 7.5 to 10.0 at all times.
(i) Subpart G—Facility Washdown.
NSPS
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
Total suspended solids .000 .000
pH (1) (1)
Within the range of 7.5 to 10.0 at all times.
(j) Subpart G—Employee Handwash.
NSPS
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
Total suspended solids 49.500 39.600
pH (1) (1)
Within the range of 7.5 to 10.0 at all times.
(k) Subpart G—Respirator Wash.
NSPS
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
Total suspended solids 79.500 63.600
pH (1) (1)
Within the range of 7.5 to 10.0 at all times.
(l) Subpart G—Laundering of Uniforms.
NSPS
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
Total suspended solids 232.500 186.000
pH (1) (1)
Within the range of 7.5 to 10.0 at all times.
Collected 2026-08-27T02:26:04Z. Source file · JSON