Regulations last checked for updates: May 19, 2024

Title 40 - Protection of Environment last revised: May 16, 2024
All TitlesTitle 40Chapter IPart 421Subpart H - Subpart H—Primary Zinc Subcategory
View all text of Subpart H [§ 421.80 - § 421.87]
§ 421.84 - Standards of performance for new sources.

Any new source subject to this subpart shall achieve the following new source performance standards:

(a) Subpart H—Zinc Reduction Furnace Wet Air Pollution Control.

NSPS

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of zinc reduced
Cadmium.334.134
Copper2.1351.018
Lead.467.217
Zinc1.702.701
Total suspended solids25.02020.020
pH( 1)( 1)

1 Within the range of 7.5 to 10.0 at all times.

(b) Subpart H—Preleach of Zinc Concentrates.

NSPS

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of concentrate leached
Cadmium.180.072
Copper1.153.550
Lead.252.117
Zinc.919.378
Total suspended solids13.52010.810
pH( 1)( 1)

1 Within the range of 7.5 to 10.0 at all times.

(c) Subpart H—Leaching Wet Air Pollution Control.

NSPS

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of zinc processed through leaching
Cadmium.000.000
Copper.000.000
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 H—Electrolyte Bleed Wastewater.

NSPS

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of cathode zinc produced
Cadmium.086.035
Copper.553.264
Lead.121.056
Zinc.441.182
Total suspended solids6.4805.184
pH( 1)( 1)

1 Within the range of 7.5 to 10.0 at all times.

(e) Subpart H—Cathode and Anode Wash Wastewater.

NSPS

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of cathode zinc produced
Cadmium.150.060
Copper.961.458
Lead.210.098
Zinc.766.315
Total suspended solids11.2709.012
pH( 1)( 1)

1 Within the range of 7.5 to 10.0 at all times.

(f) Subpart H—Casting Wet Air Pollution Control.

NSPS

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of zinc cast
Cadmium.051.021
Copper.329.157
Lead.072.033
Zinc.262.108
Total suspended solids3.8553.084
pH( 1)( 1)

1 Within the range of 7.5 to 10.0 at all times.

(g) Subpart H—Casting Contact Cooling.

NSPS

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of zinc cast
Cadmium.036.014
Copper.232.110
Lead.051.024
Zinc.185.076
Total suspended solids2.7152.172
pH( 1)( 1)

1 Within the range of 7.5 to 10.0 at all times.

(h) Subpart H—Cadmium Plant Wastewater.

NSPS

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of cadmium produced
Cadmium1.234.494
Copper7.8993.765
Lead1.728.802
Zinc6.2952.592
Total suspended solids92.57074.050
pH( 1)( 1)

1 Within the range of 7.5 to 10.0 at all times.

[49 FR 8808, Mar. 8, 1984; 49 FR 26739, June 29, 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 421.84
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