Regulations last checked for updates: May 20, 2024

Title 40 - Protection of Environment last revised: May 16, 2024
§ 421.74 - Standards of performance for new sources.

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)

1Within 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)

1Within 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)

1Within 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)

1Within 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)

1Within 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)

1Within 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)

1Within 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)

1Within 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
Zinc3.3661.386
Total suspended solids49.50039.600
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
Lead1.484.689
Zinc5.4062.226
Total suspended solids79.50063.600
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
Lead4.3402.015
Zinc15.8106.510
Total suspended solids232.500186.000
pH( 1)( 1)

Within the range of 7.5 to 10.0 at all times.

[49 FR 8803, Mar. 8, 1984, as amended at 49 FR 29795, July 24, 1984]
authority: Secs. 301, 304 (b), (c), (e), and (g), 306 (b) and (c), 307 (b) and (c), 308 and 501 of the Clean Water Act (the Federal Water Pollution Control Act Amendments of 1972, as amended by the Clean Water Act of 1977) and the Water Quality Act of 1987 (the “Act”); 33 U.S.C. 1311,1314,c,e,and, 1316 (b) andc, 1317 (b) andc,1318; 86 Stat. 816, Pub. L. 92-500; 91 Stat. 1567, Pub. L. 95-217; 101 Stat. 7, Pub. L. 100-4
source: 49 FR 8790, Mar. 8, 1984, unless otherwise noted.
cite as: 40 CFR 421.74