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------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average------------------------------------------------------------------------
mg/kg (pounds per
million pounds) of paste
produced
--------------Benzo(a)pyrene................................ 0.005 0.002Antimony...................................... .263 .117Nickel........................................ .075 .050Aluminum...................................... .831 .369Fluoride...................................... 8.092 3.591------------------------------------------------------------------------
(b) Subpart (B)--Anode Contact Cooling and Briquette Quenching.
BAT Effluent Limitations------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average------------------------------------------------------------------------
mg/kg (pounds per
million pounds) of
anodes cast
--------------Benzo(a)pyrene................................ 0.007 0.003Antimony...................................... .403 .180Nickel........................................ .115 .077Aluminum...................................... 1.277 .566Fluoride...................................... 12.440 5.518------------------------------------------------------------------------
(c) Subpart (B)--Anode Bake Plant Wet Air Pollution Control (Closed Top Ring Furnace).
BAT Effluent Limitations------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average------------------------------------------------------------------------
mg/kg (pounds per
million pounds) of
anodes baked
--------------Benzo(a)pyrene................................ 0.146 0.067Antimony...................................... 8.346 3.719Nickel........................................ 2.378 1.600Aluminum...................................... 26.420 11.720Fluoride...................................... 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------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average------------------------------------------------------------------------
mg/kg (pounds per
million pounds) of
anodes baked
--------------Benzo(a)pyrene................................ 0.002 0.001Antimony...................................... .097 .043Nickel........................................ .028 .019Aluminum...................................... .306 .136Fluoride...................................... 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------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average------------------------------------------------------------------------
mg/kg (pounds per
million pounds) of
anodes baked
--------------Benzo(a)pyrene................................ 0.025 0.011Antimony...................................... 1.409 .628Nickel........................................ .402 .270Aluminum...................................... 4.461 1.979Fluoride...................................... 43.440 19.270------------------------------------------------------------------------
(f) Subpart B--Anode Bake Plant Wet Air Pollution Control (Tunnel Kiln).
BAT Effluent Limitations------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average------------------------------------------------------------------------
mg/kg (pounds per
million pounds) of
anodes baked
--------------Benzo(a)pyrene................................ 0.038 0.018Antimony...................................... 2.197 .979Nickel........................................ .626 .421Aluminum...................................... 6.953 3.084Fluoride...................................... 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------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average------------------------------------------------------------------------
mg/kg (pounds per
million pounds) of
cryolite recovered
--------------Benzo(a)pyrene................................ 1.181 0.547Antimony...................................... 420.400 189.200Cyanide....................................... 157.600 70.060Nickel........................................ 80.570 35.030Aluminum...................................... 273.200 122.600Fluoride...................................... 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------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average------------------------------------------------------------------------
mg/kg (pounds per
million pounds) of
cryolite recovered
--------------Benzo(a)pyrene................................ 1.181 0.547Antimony...................................... 67.610 30.120Cyanide....................................... 157.600 70.060Nickel........................................ 19.270 12.960Aluminum...................................... 214.000 94.930Fluoride...................................... 2,084.000 924.800------------------------------------------------------------------------
(i) Subpart B--Cathode Reprocessing (Operated With Wet Potline Scrubbing).
BAT Effluent Limitations------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average------------------------------------------------------------------------
mg/kg (pound per million
pounds) of cryolite
recovered
--------------Benzo(a)pyrene................................ .000 ...........Antimony...................................... .000 .000Cyanide....................................... .000 .000Nickel........................................ .000 .000Aluminum...................................... .000 .000Fluoride...................................... .000 .000------------------------------------------------------------------------
(j) Subpart B--Potline Wet Air Pollution Control (Operated Without Cathode Reprocessing).
BAT Effluent Limitations------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average------------------------------------------------------------------------
mg/kg (pound per million
pounds) of aluminum
produced from
electrolytic reduction
--------------Benzo(a)pyrene................................ 0.028 0.013Antimony...................................... 1.618 .721Nickel........................................ .461 .310Aluminum...................................... 5.120 2.271Fluoride...................................... 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------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average------------------------------------------------------------------------
mg/kg (pound per million
pounds) of aluminum
produced from
electrolytic reduction
--------------Benzo(a)pyrene................................ 0.028 0.013Antimony...................................... 10.060 4.525Cyanide....................................... 3.771 1.676Nickel........................................ 1.928 .838Aluminum...................................... 6.537 2.933Fluoride...................................... 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------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average------------------------------------------------------------------------
mg/kg (pound per million
pounds) of aluminum
produced from
electrolytic reduction
--------------Benzo(a)pyrene................................ 0.028 0.013Antimony...................................... 1.618 .721Cyanide....................................... 3.771 1.676Nickel........................................ 0.461 .310Aluminum...................................... 5.120 2.271Fluoride...................................... 49.860 22.130------------------------------------------------------------------------
(m) Subpart B--Potroom Wet Air Pollution Control.
BAT Effluent Limitations------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average------------------------------------------------------------------------
mg/kg (pound per million
pounds) of aluminum
produced from
electrolytic reduction
--------------Benzo(a)pyrene................................ 0.056 0.026Antimony...................................... 3.204 1.428Nickel........................................ .913 .614Aluminum...................................... 10.140 4.499Fluoride...................................... 98.770 43.830------------------------------------------------------------------------
(n) Subpart B--Potline SO2 Emissions Wet Air Pollution Control.
BAT Effluent Limitations------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average------------------------------------------------------------------------
mg/kg (pound per million
pounds) of aluminum
produced from
electrolytic reduction
--------------Benzo(a)pyrene................................ 0.045 0.021Antimony...................................... 2.588 1.153Nickel........................................ .738 .496Aluminum...................................... 8.194 3.634Fluoride...................................... 79.790 35.400------------------------------------------------------------------------
(o) Subpart B--Degassing Wet Air Pollution Control.
BAT Effluent Limitations------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average------------------------------------------------------------------------
mg/kg (pound per million
pounds) of aluminum
produced from
electrolytic reduction
--------------Benzo(a)pyrene................................ (\1\) (\1\)Antimony...................................... 5.036 2.244Nickel........................................ 1.435 .965Aluminum...................................... 15.940 7.071Fluoride...................................... 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------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average------------------------------------------------------------------------
mg/kg (pound per million
pounds) of aluminum
produced from
electrolytic reduction
--------------Benzo(a)pyrene................................ .000 ...........Antimony...................................... .000 .000Nickel........................................ .000 .000Aluminum...................................... .000 .000Fluoride...................................... .000 .000------------------------------------------------------------------------
(q) Subpart B--Direct Chill Casting Contact Cooling.
BAT Effluent Limitations------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average------------------------------------------------------------------------
mg/kg (pound per million
pounds) of aluminum
product from direct
chill casting
--------------Benzo(a)pyrene................................ (\1\) (\1\)Antimony...................................... 2.565 1.143Nickel........................................ .731 .492
Aluminum...................................... 8.120 3.602Fluoride...................................... 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------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average------------------------------------------------------------------------
mg/kg (pound per million
pounds) of aluminum
product from rod casting
--------------Benzo(a)pyrene................................ (\1\) (\1\)Antimony...................................... .201 .089Nickel........................................ .057 .038Aluminum...................................... .636 .282Fluoride...................................... 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------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average------------------------------------------------------------------------
mg/kg (pound per million
pounds) of aluminum
product from stationary
casting or shot casting
--------------Benzo(a)pyrene................................ .000 ...........Antimony...................................... .000 .000Nickel........................................ .000 .000Aluminum...................................... .000 .000Fluoride...................................... .000 .000------------------------------------------------------------------------ [49 FR 8792, Mar. 8, 1984, as amended at 52 FR 25556, July 7, 1987]