CFR / Title 40 / Part 421 / Sec. 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------------------------------------------------------------------------

Maximum for

Pollutant or pollutant property Maximum for monthly

any 1 day average------------------------------------------------------------------------

mg/kg (pound per million

pounds) of paste

produced

--------------Benzo(a)pyrene................................ .000 ...........Antimony...................................... .000 .000Nickel........................................ .000 .000Aluminum...................................... .000 .000Fluoride...................................... .000 .000Oil and grease................................ .000 .000Total suspended solids........................ .000 .000pH............................................ (\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------------------------------------------------------------------------

Maximum for

Pollutant or pollutant property Maximum for monthly

any 1 day average------------------------------------------------------------------------

mg/kg (pound per million

pounds) of anodes cast

--------------Benzo(a)pyrene................................ 0.007 0.003Antimony...................................... .403 .180Nickel........................................ .115 .077Aluminum...................................... 1.277 .566Fluoride...................................... 12.440 5.518Oil and grease................................ 2.090 2.090Total suspended solids........................ 3.135 2.508pH............................................ (\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------------------------------------------------------------------------

Maximum for

Pollutant or pollutant property Maximum for monthly

any 1 day average------------------------------------------------------------------------

mg/kg (pound per million

pounds) of anodes baked

(d) Subpart B--Cathode Reprocessing (Operated With Dry Potline Scrubbing and Not Commingled With Other Process or Nonprocess Waters).

NSPS------------------------------------------------------------------------

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................................ 1.181 0.547

Antimony...................................... 420.400 189.200Cyanide....................................... 157.600 70.060Nickel........................................ 80.570 35.030Aluminum...................................... 273.200 122.600Fluoride...................................... 29,430.000 13,310.000Oil and grease................................ 350.300 350.300Total suspended solids........................ 2,172.000 945.800pH............................................ (\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------------------------------------------------------------------------

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................................ 1.181 0.547Antimony...................................... 67.610 30.120Cyanide....................................... 157.600 70.060Nickel........................................ 19.270 12.960Aluminum...................................... 214.000 94.930Fluoride...................................... 2,084.000 924.800Oil and grease................................ 350.300 350.300Total suspended solids........................ 2,172.000 945.800pH............................................ (\1\) (\1\)------------------------------------------------------------------------\1\ Within the range of 7.0 to 10.0 at all times.

(f) Subpart B--Potline Wet Air Pollution Control.

NSPS------------------------------------------------------------------------

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

(g) Subpart B--Potroom Wet Air Pollution Control.

NSPS------------------------------------------------------------------------

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

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

NSPS------------------------------------------------------------------------

Maximum for

Pollutant or pollutant property Maximum for monthly

any 1 day average------------------------------------------------------------------------

mg/kg (pound per million

pounds) aluminum

produced from

electrolytic reduction

--------------Benzo(a)pyrene................................ 0.045 0.021Antimony...................................... 2.588 1.153Nickel........................................ .738 .496Aluminum...................................... 8.194 3.634Fluoride...................................... 79.790 35.400Oil and grease................................ 13.410 13.410Total suspended solids........................ 20.120 16.090pH............................................ (\1\) (\1\)------------------------------------------------------------------------\1\ Within the range of 7.0 to 10.0 at all times.

(i) Subpart B--Degassing Wet Air Pollution Control.

NSPS------------------------------------------------------------------------

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

(j) Subpart B--Pot Repair and Pot Soaking.

NSPS------------------------------------------------------------------------

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

(k) Subpart B--Direct Chill Casting Contact Cooling.

NSPS------------------------------------------------------------------------

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 .492Aluminum...................................... 8.120 3.602Fluoride...................................... 79.080 35.090Oil and grease................................ 13.290 13.290Total suspended solids........................ 19.940 15.950pH............................................ (\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------------------------------------------------------------------------

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 2.746Oil and grease................................ 1.040 1.040Total suspended solids........................ 1.560 1.248pH............................................ (\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------------------------------------------------------------------------

Maximum for

Pollutant or pollutant property Maximum for monthly

any 1 day average------------------------------------------------------------------------

mg/kg (pounds per

million pounds) of

aluminum product from

stationary casting or

shot casting