40 CFR 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)

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)

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)

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)

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)

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)

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)

1 Within the range of 7.0 to 10.0 at all times.

(h) Subpart B—Potline SO2 Emissions Wet Air Pollution Control.

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)

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)

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)

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)

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)

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)

1 Within the range of 7.0 to 10.0 at all times.