[Code of Federal Regulations]
[Title 40, Volume 28]
[Revised as of July 1, 2006]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR421.23]
[Page 460-463]
TITLE 40--PROTECTION OF ENVIRONMENT
CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
PART 421_NONFERROUS METALS MANUFACTURING POINT SOURCE CATEGORY--Table
of Contents
Subpart B_Primary Aluminum Smelting Subcategory
Sec. 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:
[[Page 461]]
(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 0.002
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
------------------------------------------------------------------------
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 0.003
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
------------------------------------------------------------------------
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 0.067
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
------------------------------------------------------------------------
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 0.001
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
------------------------------------------------------------------------
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 0.011
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
------------------------------------------------------------------------
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 0.018
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
------------------------------------------------------------------------
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 0.547
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).
[[Page 462]]
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 0.547
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
------------------------------------------------------------------------
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 .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
------------------------------------------------------------------------
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 0.013
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
------------------------------------------------------------------------
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 0.013
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
------------------------------------------------------------------------
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 0.013
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
------------------------------------------------------------------------
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 0.026
Antimony...................................... 3.204 1.428
Nickel........................................ .913 .614
Aluminum...................................... 10.140 4.499
Fluoride...................................... 98.770 43.830
------------------------------------------------------------------------
(n) Subpart B--Potline SO2 Emissions Wet Air Pollution
Control.
[[Page 463]]
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 0.021
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
------------------------------------------------------------------------
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 2.244
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
------------------------------------------------------------------------
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 .000
Nickel........................................ .000 .000
Aluminum...................................... .000 .000
Fluoride...................................... .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 1.143
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
------------------------------------------------------------------------
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 .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
------------------------------------------------------------------------
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 .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]