Regulations last checked for updates: Jun 17, 2025

Title 40 - Protection of Environment last revised: Nov 17, 2025
All TitlesTitle 40Chapter IPart 461Subpart F - Subpart F—Magnesium Subcategory
View all text of Subpart F [§ 461.60 - § 461.65]
§ 461.63 - 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 F—Silver Chloride Cathodes—Chemically Reduced—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
Lead22.9310.65
Silver23.759.83
Iron98.2849.96
TSS1,228.5982.8
COD4,095.01,999.0
pH( 1)( 1)

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

(2) Subpart F—Silver Chloride Cathodes—Electrolytic—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
Lead40.618.9
Silver42.117.4
Iron174.088.5
TSS2,175.01,740.0
COD7,250.03,540.0
pH( 1)( 1)

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

(3) Subpart F—Cell Testing—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
Lead19.57.89
Silver15.36.31
Iron63.132.1
TSS789.0631.2
COD2,630.01,290.0
pH( 1)( 1)

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

(4) Subpart F—Floor and Equipment Wash—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
Lead0.0260.012
Silver0.0270.011
Iron0.1120.057
COD4.702.30
TSS1.411.13
pH( 1)( 1)

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

(5) Subpart F—Air Scrubber—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
TSS8,467.04,030.0
pH( 1)( 1)

1 Within the range 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.

[49 FR 9134, Mar. 9, 1984; 49 FR 13879, Apr. 9, 1984]
source: 49 FR 9134, Mar. 9, 1984, unless otherwise noted.
cite as: 40 CFR 461.63
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