Regulations last checked for updates: May 21, 2024

Title 40 - Protection of Environment last revised: May 17, 2024
All TitlesTitle 40Chapter IPart 461Subpart G - Subpart G—Zinc Subcategory
View all text of Subpart G [§ 461.70 - § 461.75]
§ 461.73 - New source performance standards. (NSPS).

(a) The discharge of wastewater pollutants from any new source subject to this subpart shall not exceed the standards set forth below:

(1) Subpart G—Zinc Oxide Formed Anodes—NSPS.

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
Metric units—mg/kg of zinc
English units—pounds per 1,000,000 pounds of zinc
Chromium4.551.97
Mercury2.821.19
Silver4.551.97
Zinc0.870.39
Manganese6.504.98
Oil and grease216.7216.7
TSS325.0260.0
pH( 1)( 1)

1 Within the limits of 7.5-10.0 at all times.

(2) Subpart G—Electrodeposited Anodes—NSPS.

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
Metric units—mg/kg of zinc deposited
English units—pounds per 1,000,000 pounds of zinc deposited
Chromium45.0919.54
Mercury27.9111.81
Silver45.0919.54
Zinc8.593.86
Manganese64.4149.38
Oil and grease2,147.002,147.00
TSS3,220.502,576.40
pH( 1)( 1)

1 Within the limits of 7.5-10.0 at all times.

(3) Subpart G—Silver Powder Formed Cathodes—NSPS.

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
Metric units—mg/kg of silver applied
English units—pounds per 1,000,000 pounds of silver applied
Chromium6.242.70
Mercury3.861.63
Silver6.242.70
Zinc1.190.53
Manganese8.916.83
Oil and grease297.00297.00
TSS445.5 356.40
pH( 1)( 1)

1 Within the limits of 7.5-10.0 at all times.

(4) Subpart G—Silver Oxide Powder Formed Cathodes—NSPS.

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
Metric units—mg/kg of silver applied
English units—pounds per 1,000,000 pounds of silver applied
Chromium4.171.81
Mercury2.581.09
Silver4.171.81
Zinc0.790.36
Manganese5.964.57
Oil and grease198.5198.5
TSS297.8238.2
pH( 1)( 1)

1 Within the limits of 7.5-10.0 at all times.

(5) Subpart G—Silver Peroxide Cathodes—NSPS.

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
Metric units—mg/kg of silver applied
English units—pounds per 1,000,000 pounds of silver applied
Chromium1.000.43
Mercury0.620.26
Silver1.000.43
Zinc0.190.09
Manganese1.431.09
Oil and grease47.647.6
TSS71.457.1
pH( 1)( 1)

1 Within the limits of 7.5-10.0 at all times.

(6) Subpart G—Nickel Impregnated Cathodes—NSPS.

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
Metric units—mg/kg of nickel applied
English units—pounds per 1,000,000 pounds of nickel applied
Chromium42.018.2
Mercury26.011.0
Nickel42.018.2
Silver42.018.2
Zinc8.03.6
Manganese60.046.0
Oil and grease2,000.02,000.0
TSS3,000.02,400.00
pH( 1)( 1)

1 Within the limits of 7.5-10.0 at all times.

(7) Subpart G—Miscellaneous Wastewater Streams—NSPS.

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
Metric units—mg/kg of cells produced
English units—pounds per 1,000,000 pounds of cells produced
Chromium0.270.12
Cyanide0.0390.016
Mercury0.170.07
Nickel0.270.12
Silver0.270.12
Zinc0.050.02
Manganese0.390.30
Oil and grease12.9012.90
TSS19.3515.48
pH( 1)( 1)

1 Within the limits of 7.5-10.0 at all times.

(8) Subpart G—Silver Etch—NSPS.

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
Metric units—mg/kg of silver processed
English units—pounds per 1,000,000 pounds of silver processed
Chromium1.560.68
Mercury0.970.41
Silver1.560.68
Zinc0.300.13
Manganese2.231.71
Oil and grease74.4074.40
TSS111.6089.28
pH( 1)( 1)

1 Within the limits of 7.5-10.0 at all times.

(9) Subpart G—Silver Peroxide Production—NSPS.

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
Metric units—mg/kg of silver peroxide produced
English units—pounds per 1,000,000 pounds of silver peroxide produced
Chromium1.660.72
Mercury1.030.44
Silver1.660.72
Zinc0.320.14
Manganese2.371.82
Oil and grease79.1079.10
TSS118.6594.92
pH( 1)( 1)

1 Within the limits of 7.5-10.0 at all times.

(10) Subpart G—Silver Powder Production—NSPS.

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
Metric units—mg/kg of silver powder produced
English units—pounds per 1,000,000 pounds of silver powder produced
Chromium0.670.29
Mercury0.420.18
Silver0.670.29
Zinc0.130.06
Manganese0.960.74
Oil and grease32.1032.10
TSS48.1538.52
pH( 1)( 1)

1 Within the limits of 7.5-10.0 at all times.

(b) There shall be no discharge allowance for process wastewater pollutants from any battery manufacturing operation other than those battery manufacturing operations listed above.

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) (the “Act”); 33 U.S.C. 1311,1314,c,e,and, 1316 (b) andc, 1317 (b) andc,and; 86 Stat. 816, Pub. L. 92-500; 91 Stat. 1567, Pub. L. 95-217
source: 49 FR 9134, Mar. 9, 1984, unless otherwise noted.
cite as: 40 CFR 461.73
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