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421.23—Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.
Except as provided in 40 CFR 125.30 through 125.32, any existing point source subject to this subpart shall achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable:
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of paste produced | ||
| Benzo(a)pyrene | 0.005 | 0.002 |
| Antimony | .263 | .117 |
| Nickel | .075 | .050 |
| Aluminum | .831 | .369 |
| Fluoride | 8.092 | 3.591 |
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds 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 |
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of anodes baked | ||
| Benzo(a)pyrene | 0.146 | 0.067 |
| Antimony | 8.346 | 3.719 |
| Nickel | 2.378 | 1.600 |
| Aluminum | 26.420 | 11.720 |
| Fluoride | 257.300 | 114.200 |
(d)
Subpart B—Anode Bake Plant Wet Air Pollution Control (Open Top Ring Furnace With Spray Tower Only).
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of anodes baked | ||
| Benzo(a)pyrene | 0.002 | 0.001 |
| Antimony | .097 | .043 |
| Nickel | .028 | .019 |
| Aluminum | .306 | .136 |
| Fluoride | 2.975 | 1.320 |
(e)
Subpart B—Anode Bake Plant Wet Air Pollution Control (Open Top Ring Furnace With Wet Electrostatic Precipitator and Spray Tower).
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of anodes baked | ||
| Benzo(a)pyrene | 0.025 | 0.011 |
| Antimony | 1.409 | .628 |
| Nickel | .402 | .270 |
| Aluminum | 4.461 | 1.979 |
| Fluoride | 43.440 | 19.270 |
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of anodes baked | ||
| Benzo(a)pyrene | 0.038 | 0.018 |
| Antimony | 2.197 | .979 |
| Nickel | .626 | .421 |
| Aluminum | 6.953 | 3.084 |
| Fluoride | 67.710 | 30.050 |
(g)
Subpart B—Cathode Reprocessing (Operated With Dry Potline Scrubbing and Not Commingled With Other Process or Nonprocess Waters).
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds 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 |
(h)
Subpart B—Cathode Reprocessing (Operated With Dry Potline Scrubbing and Commingled With Other Process or Nonprocess Waters).
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds 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 |
| 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 | .000 | |
| Antimony | .000 | .000 |
| Cyanide | .000 | .000 |
| Nickel | .000 | .000 |
| Aluminum | .000 | .000 |
| Fluoride | .000 | .000 |
| 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 | 0.028 | 0.013 |
| Antimony | 1.618 | .721 |
| Nickel | .461 | .310 |
| Aluminum | 5.120 | 2.271 |
| Fluoride | 49.860 | 22.130 |
(k)
Subpart B—Potline Wet Air Pollution Control (Operated With Cathode Reprocessing and Not Commingled With Other Process or Nonprocess Waters).
| 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 | 0.028 | 0.013 |
| Antimony | 10.060 | 4.525 |
| Cyanide | 3.771 | 1.676 |
| Nickel | 1.928 | .838 |
| Aluminum | 6.537 | 2.933 |
| Fluoride | 703.900 | 318.500 |
(l)
Potline Wet Air Pollution Control Cooperated With Cathode Reprocessing and Commingled With Other Process or Nonprocess Wastewaters).
| 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 | 0.028 | 0.013 |
| Antimony | 1.618 | .721 |
| Cyanide | 3.771 | 1.676 |
| Nickel | 0.461 | .310 |
| Aluminum | 5.120 | 2.271 |
| Fluoride | 49.860 | 22.130 |
| 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 | 0.056 | 0.026 |
| Antimony | 3.204 | 1.428 |
| Nickel | .913 | .614 |
| Aluminum | 10.140 | 4.499 |
| Fluoride | 98.770 | 43.830 |
| 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 | 0.045 | 0.021 |
| Antimony | 2.588 | 1.153 |
| Nickel | .738 | .496 |
| Aluminum | 8.194 | 3.634 |
| Fluoride | 79.790 | 35.400 |
| 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 | (1) | (1) |
| Antimony | 5.036 | 2.244 |
| Nickel | 1.435 | .965 |
| Aluminum | 15.940 | 7.071 |
| Fluoride | 155.300 | 68.880 |
| 1 There shall be no discharge allowance for this pollutant. | ||
| 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 |
| 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 |
|
Code of Federal Regulations
465
|
||
| Fluoride | 79.080 | 35.090 |
| 1 There shall be no discharge allowance for this pollutant. | ||
| 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 |
| 1 There shall be no discharge allowance for this pollutant. | ||
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pound 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 |
[49 FR 8792, Mar. 8, 1984, as amended at 52 FR 25556, July 7, 1987]
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