View all text of Subpart B [§ 421.20 - § 421.27]
§ 421.24 - Standards of performance for new sources.
Any new source subject to this subpart shall achieve the following new source performance standards:
(a) Subpart B—Anode and Cathode Paste Plant Wet Air.
Pollution Control—NSPS
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/kg (pound per million pounds) of paste produced | Benzo(a)pyrene | .000 | Antimony | .000 | .000 | Nickel | .000 | .000 | Aluminum | .000 | .000 | Fluoride | .000 | .000 | Oil and grease | .000 | .000 | Total suspended solids | .000 | .000 | pH | ( 1) | ( 1) |
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1 Within the range of 7.0 to 10.0 at all times.
(b) Subpart B—Anode Contact Cooling and Briquette Quenching.
NSPS
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/kg (pound per million pounds) of anodes cast | Benzo(a)pyrene | 0.007 | 0.003 | Antimony | .403 | .180 | Nickel | .115 | .077 | Aluminum | 1.277 | .566 | Fluoride | 12.440 | 5.518 | Oil and grease | 2.090 | 2.090 | Total suspended solids | 3.135 | 2.508 | pH | ( 1) | ( 1) |
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1 Within the range of 7.0 to 10.0 at all times.
(c) Subpart B—Anode Bake Plant Wet Air Pollution Control.
NSPS
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/kg (pound per million pounds) of anodes baked | Benzo(a)pyrene | .000 | Antimony | .000 | .000 | Nickel | .000 | .000 | Aluminum | .000 | .000 | Fluoride | .000 | .000 | Oil and grease | .000 | .000 | Total suspended solids | .000 | .000 | pH | ( 1) | ( 1) |
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1 Within the range of 7.0 to 10.0 at all times.
(d) Subpart B—Cathode Reprocessing (Operated With Dry Potline Scrubbing and Not Commingled With Other Process or Nonprocess Waters).
NSPS
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/kg (pound per million pounds) of cryolite recovered | Benzo(a)pyrene | 1.181 | 0.547 | Antimony | 420.400 | 189.200 | Cyanide | 157.600 | 70.060 | Nickel | 80.570 | 35.030 | Aluminum | 273.200 | 122.600 | Fluoride | 29,430.000 | 13,310.000 | Oil and grease | 350.300 | 350.300 | Total suspended solids | 2,172.000 | 945.800 | pH | ( 1) | ( 1) |
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1 Within the range of 7.0 to 10.0 at all times.
(e) Subpart B—Cathode Reprocessing (Operated With Dry Potline Scrubbing and Commingled With Other Process or Nonprocess Waters).
NSPS
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/kg (pound per million pounds) of cryolite recovered | Benzo(a)pyrene | 1.181 | 0.547 | Antimony | 67.610 | 30.120 | Cyanide | 157.600 | 70.060 | Nickel | 19.270 | 12.960 | Aluminum | 214.000 | 94.930 | Fluoride | 2,084.000 | 924.800 | Oil and grease | 350.300 | 350.300 | Total suspended solids | 2,172.000 | 945.800 | pH | ( 1) | ( 1) |
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1 Within the range of 7.0 to 10.0 at all times.
(f) Subpart B—Potline Wet Air Pollution Control.
NSPS
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/kg (pound per million pounds) of aluminum produced from electrolytic reduction | Benzo(a)pyrene | .000 | Antimony | .000 | .000 | Nickel | .000 | .000 | Aluminum | .000 | .000 | Fluoride | .000 | .000 | Oil and grease | .000 | .000 | Total suspended solids | .000 | .000 | pH | ( 1) | ( 1) |
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1 Within the range of 7.0 to 10.0 at all times.
(g) Subpart B—Potroom Wet Air Pollution Control.
NSPS
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/kg (pound per million pounds) of aluminum produced from electrolytic reduction | Benzo(a)pyrene | .000 | Antimony | .000 | .000 | Nickel | .000 | .000 | Aluminum | .000 | .000 | Fluoride | .000 | .000 | Oil and grease | .000 | .000 | Total suspended solids | .000 | .000 | pH | ( 1) | ( 1) |
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1 Within the range of 7.0 to 10.0 at all times.
(h) Subpart B—Potline SO
NSPS
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/kg (pound per million pounds) aluminum produced from electrolytic reduction | Benzo(a)pyrene | 0.045 | 0.021 | Antimony | 2.588 | 1.153 | Nickel | .738 | .496 | Aluminum | 8.194 | 3.634 | Fluoride | 79.790 | 35.400 | Oil and grease | 13.410 | 13.410 | Total suspended solids | 20.120 | 16.090 | pH | ( 1) | ( 1) |
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1 Within the range of 7.0 to 10.0 at all times.
(i) Subpart B—Degassing Wet Air Pollution Control.
NSPS
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/kg (pound per million pounds) of aluminum produced from electrolytic reduction | Benzo(a)pyrene | .000 | Antimony | .000 | .000 | Nickel | .000 | .000 | Aluminum | .000 | .000 | Fluoride | .000 | .000 | Oil and grease | .000 | .000 | Total suspended solids | .000 | .000 | pH | ( 1) | ( 1) |
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1 Within the range of 7.0 to 10.0 at all times.
(j) Subpart B—Pot Repair and Pot Soaking.
NSPS
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/kg (pound per million pounds) of aluminum produced from electrolytic reduction | Benzo(a)pyrene | .000 | Antimony | .000 | .000 | Nickel | .000 | .000 | Aluminum | .000 | .000 | Fluoride | .000 | .000 | Oil and grease | .000 | .000 | Total suspended solids | .000 | .000 | pH | ( 1) | ( 1) |
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1 Within the range of 7.0 to 10.0 at all times.
(k) Subpart B—Direct Chill Casting Contact Cooling.
NSPS
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/kg (pound per million pounds) of aluminum product from direct chill casting | Benzo(a)pyrene | ( 1) | ( 1) | Antimony | 2.565 | 1.143 | Nickel | .731 | .492 | Aluminum | 8.120 | 3.602 | Fluoride | 79.080 | 35.090 | Oil and grease | 13.290 | 13.290 | Total suspended solids | 19.940 | 15.950 | pH | ( 2) | ( 2) |
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1 There shall be no discharge allowance for this pollutant.
2 The pH shall be maintained within the range of 7.0 to 10.0 at all times except for those situations when this waste is discharged separately and without commingling with any other waste-water in which case the pH shall be within the range of 6.0 to 10.0 at all times.
(l) Subpart B—Continuous Rod Casting Contact Cooling.
NSPS
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/kg (pound per million pounds) of aluminum product from rod casting | Benzo(a)pyrene | ( 1) | ( 1) | Antimony | .201 | .089 | Nickel | .057 | .038 | Aluminum | .636 | .282 | Fluoride | 6.188 | 2.746 | Oil and grease | 1.040 | 1.040 | Total suspended solids | 1.560 | 1.248 | pH | ( 2) | ( 2) |
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1 There shall be no discharge allowance for this pollutant.
2 Within the range of 7.0 to 10.0 at all times.
(m) Subpart B—Stationary Casting or Shot Casting Contact Cooling.
NSPS
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/kg (pounds per million pounds) of aluminum product from stationary casting or shot casting | Benzo(a)pyrene | .000 | Antimony | .000 | .000 | Nickel | .000 | .000 | Aluminum | .000 | .000 | Fluoride | .000 | .000 | Oil and grease | .000 | .000 | Total suspended solids | .000 | .000 | pH | ( 1) | ( 1) |
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1 Within the range of 7.0 to 10.0 at all times.