View all text of Subpart G [§ 461.70 - § 461.75]
§ 461.71 - Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT).
(a) Except as provided in 40 CFR 125.30 through 125.32, any existing point source subject to this subpart must achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available:
(1) Subpart G—Wet Amalgamated Powder Anodes.
BPT Effluent Limitations
| 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 | Chromium | 1.67 | 0.68 | Mercury | 0.95 | 0.38 | Silver | 1.56 | 0.65 | Zinc | 5.55 | 2.32 | Manganese | 2.58 | 1.10 | Oil and grease | 76.0 | 45.6 | TSS | 155.8 | 74.1 | pH | ( 1) | ( 1) |
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1 Within the range of 7.5-10.0 at all times.
(2) Subpart G—Gelled Amalgam Anodes.
BPT Effluent Limitations
| 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 | Chromium | 0.30 | 0.12 | Mercury | 0.17 | 0.07 | Silver | 0.28 | 0.12 | Zinc | 0.99 | 0.42 | Manganese | 0.46 | 0.20 | Oil and grease | 13.6 | 8.16 | TSS | 27.9 | 13.26 | pH | ( 1) | ( 1) |
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1 Within the range of 7.5-10.0 at all times.
(3) Subpart G—Zinc Oxide, Formed Anodes.
BPT Effluent Limitations
| 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 | Chromium | 62.9 | 25.7 | Mercury | 35.8 | 14.3 | Silver | 58.7 | 24.3 | Zinc | 208.8 | 87.2 | Manganese | 97.2 | 41.5 | Oil and grease | 2,860.0 | 1,716.0 | TSS | 5,863.0 | 2,789.0 | pH | ( 1) | ( 1) |
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1 Within the range of 7.5-10.0 at all times.
(4) Subpart G—Electrodeposited Anodes.
BPT Effluent Limitations
| 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 | Chromium | 1,404.0 | 574.0 | Mercury | 798.0 | 319.0 | Silver | 1,308.0 | 543.0 | Zinc | 4,657.0 | 1,946.0 | Manganese | 2,169.0 | 925.0 | Oil and grease | 63,800.0 | 38,280.0 | TSS | 130,700.0 | 62,210.0 | pH | ( 1) | ( 1) |
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1 Within the range of 7.5-10.0 at all times.
(5) Subpart G—Silver Powder, Formed Cathodes.
BPT Effluent Limitations
| 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 | Chromium | 86.2 | 35.3 | Mercury | 49.0 | 19.6 | Silver | 80.4 | 33.3 | Zinc | 286.2 | 119.6 | Manganese | 133.3 | 56.8 | Oil and grease | 3,920.0 | 2,350.0 | TSS | 8,036.0 | 3,822.0 | pH | ( 1) | ( 1) |
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1 Within the range of 7.5-10.0 at all times.
(6) Subpart G—Silver Oxide Powder, Formed Cathodes.
BPT Effluent Limitations
| 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 | Chromium | 57.7 | 23.6 | Mercury | 32.8 | 13.1 | Silver | 53.7 | 22.3 | Zinc | 191.3 | 79.9 | Manganese | 89.1 | 38.0 | Oil and grease | 2,620.0 | 1,570.0 | TSS | 5,370.0 | 2,554.0 | pH | ( 1) | ( 1) |
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1 Within the range of 7.5-10.0 at all times.
(7) Subpart G—Silver Peroxide Cathodes.
BPT Effluent Limitations
| 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 | Chromium | 13.8 | 5.65 | Mercury | 7.85 | 3.14 | Silver | 12.9 | 5.34 | Zinc | 45.8 | 19.2 | Manganese | 21.4 | 9.11 | Oil and grease | 628.0 | 377.0 | TSS | 1,287.0 | 612.0 | pH | ( 1) | ( 1) |
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1 Within the range of 7.5-10.0 at all times.
(8) Subpart G—Nickel Impregnated Cathodes.
BPT Effluent Limitations
| 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 | Chromium | 721.6 | 295.2 | Mercury | 410.0 | 164.0 | Nickel | 3,149.0 | 2,083.0 | Silver | 672.4 | 279.0 | Zinc | 2,394.4 | 1,000.4 | Manganese | 1,115.2 | 475.6 | Oil and grease | 32,800.0 | 19,680.0 | TSS | 67,240.0 | 31,980.0 | pH | ( 1) | ( 1) |
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1 Within the range of 7.5-10.0 at all times.
(9) Subpart G—Miscellaneous Wastewater Streams.
BPT Effluent Limitations
| 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 | Chromium | 3.85 | 1.58 | Cyanide | 2.54 | 1.05 | Mercury | 2.19 | 0.88 | Nickel | 16.82 | 11.12 | Silver | 3.59 | 1.49 | Zinc | 12.79 | 5.34 | Manganese | 5.96 | 2.54 | Oil and grease | 175.20 | 105.12 | TSS | 359.16 | 170.82 | pH | ( 1) | ( 1) |
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1 Within the range of 7.5-10.0 at all times.
(10) Subpart G—Silver Etch.
BPT Effluent Limitations
| 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 | Chromium | 21.6 | 8.84 | Mercury | 12.3 | 4.91 | Silver | 20.2 | 8.35 | Zinc | 71.7 | 30.0 | Manganese | 33.4 | 14.3 | Oil and grease | 982.0 | 589.2 | TSS | 2,013.1 | 957.5 | pH | ( 1) | ( 1) |
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1 Within the range of 7.5-10.0 at all times.
(11) Subpart G—Silver Peroxide Production.
BPT Effluent Limitations
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | Metric units—mg/kg of silver peroxide processed | English units—pounds per 1,000,000 pounds of silver peroxide processed | Chromium | 23.0 | 9.40 | Mercury | 13.1 | 5.22 | Silver | 21.4 | 8.88 | Zinc | 76.2 | 31.80 | Manganese | 35.5 | 15.10 | Oil and grease | 1,044.0 | 627.00 | TSS | 2,140.0 | 1,018.00 | pH | ( 1) | ( 1) |
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1 Within the range of 7.5-10.0 at all times.
(12) Subpart G—Silver Powder Production.
BPT Effluent Limitations
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | Metric units—mg/kg of silver powder processed | English units—pounds per 1,000,000 pounds of silver powder processed | Chromium | 9.33 | 3.82 | Mercury | 5.30 | 2.12 | Silver | 8.69 | 3.61 | Zinc | 30.95 | 12.93 | Manganese | 14.42 | 6.15 | Oil and grease | 424.0 | 254.40 | TSS | 869.0 | 413.40 | pH | ( 1) | ( 1) |
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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.