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Title 40

Displaying title 40, up to date as of 10/13/2026. Title 40 was last amended 10/13/2026.
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Subpart F—Magnesium Subcategory

§ 461.60 Applicability; description of the magnesium subcategory.

This subpart applies to discharges to waters of the United States and introduction of pollutants into publicly owned treatment works from the manufacturing of magnesium anode batteries.

§§ 461.61-461.62 [Reserved]

§ 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
Lead 22.93 10.65
Silver 23.75 9.83
Iron 98.28 49.96
TSS 1,228.5 982.8
COD 4,095.0 1,999.0
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
Lead 40.6 18.9
Silver 42.1 17.4
Iron 174.0 88.5
TSS 2,175.0 1,740.0
COD 7,250.0 3,540.0
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
Lead 19.5 7.89
Silver 15.3 6.31
Iron 63.1 32.1
TSS 789.0 631.2
COD 2,630.0 1,290.0
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
Lead 0.026 0.012
Silver 0.027 0.011
Iron 0.112 0.057
COD 4.70 2.30
TSS 1.41 1.13
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
TSS 8,467.0 4,030.0
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]

§ 461.64 Pretreatment standards for existing sources (PSES).

(a) Except as provided in 40 CFR 403.7 and 403.13, any existing source subject to this subpart that introduces pollutants into a publicly owned treatment works must comply with 40 CFR part 403 and achieve the following pretreatment standards for existing sources listed below:

(1) Subpart F—Silver Chloride Cathodes—Chemically Reduced—PSES.

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
Lead 1,032.36 491.60
Silver 1,007.78 417.86

(2) Subpart F—Silver Chloride Cathodes—Electrolytic—PSES.

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
Lead 60.9 29.0
Silver 59.5 24.7

(3) Subpart F—Cell Testing—PSES.

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
Lead 22.1 10.5
Silver 21.6 8.9

(4) Subpart F—Floor and Equipment Wash—PSES.

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
Lead 0.039 0.018
Silver 0.038 0.015

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

§ 461.65 Pretreatment standards for new sources (PSNS).

(a) Except as provided in § 403.7 any new source subject to this subpart that introduces pollutants into a publicly owned treatment works must comply with 40 CFR part 403 and achieve the following pretreatment standards for new sources listed below:

(1) Subpart F—Silver Chloride Cathodes—Chemically Reduced—PSNS.

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
Lead 22.93 10.65
Silver 23.75 9.83

(2) Subpart F—Silver Chloride Cathodes—Electrolytic PSNS.

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
Lead 40.6 18.9
Silver 42.1 17.4

(3) Subpart F—Cell Testing—PSNS.

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
Lead 19.5 7.89
Silver 15.3 6.31

(4) Subpart F—Floor and Equipment Wash—PSNS.

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
Lead 0.026 0.012
Silver 0.027 0.011

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