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: (a) Subpart B—Anode and Cathode Paste Plant Wet Air Pollution Control BAT Effluent Limitations 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 (b) Subpart (B)—Anode Contact Cooling and Briquette Quenching. BAT Effluent Limitations 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 (c) Subpart (B)—Anode Bake Plant Wet Air Pollution Control (Closed Top Ring Furnace). BAT Effluent Limitations 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). BAT Effluent Limitations 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). BAT Effluent Limitations 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 (f) Subpart B—Anode Bake Plant Wet Air Pollution Control (Tunnel Kiln). BAT Effluent Limitations 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). BAT Effluent Limitations 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). BAT Effluent Limitations 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 (i) Subpart B—Cathode Reprocessing (Operated With Wet Potline Scrubbing). BAT Effluent Limitations 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 (j) Subpart B—Potline Wet Air Pollution Control (Operated Without Cathode Reprocessing). BAT Effluent Limitations 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). BAT Effluent Limitations 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). BAT Effluent Limitations 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 (m) Subpart B—Potroom Wet Air Pollution Control. BAT Effluent Limitations 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 (n) Subpart B—Potline SO 2 Emissions Wet Air Pollution Control. BAT Effluent Limitations 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 (o) Subpart B—Degassing Wet Air Pollution Control. BAT Effluent Limitations 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. (p) Subpart B—Pot Repair and Pot Soaking. BAT Effluent Limitations 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 (q) Subpart B—Direct Chill Casting Contact Cooling. BAT Effluent Limitations 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 1 There shall be no discharge allowance for this pollutant. (r) Subpart B—Continuous Rod Casting Contact Cooling. BAT Effluent Limitations 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. (s) Subpart B—Stationary Casting or Shot Casting Contact Cooling. BAT Effluent Limitations 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]