40 CFR 421.33: 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 C—Scrap Drying Wet Air Pollution Control.

BAT Effluent Limitations

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average

mg/kg (pound's per million pounds) of aluminum scrap dried

Lead .000 .000

Zinc .000 .000

Aluminum .000 .000

Ammonia (as N) .000 .000

(b) Subpart C—Scrap Screening and Milling.

BAT Effluent Limitations

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average

mg/kg (pound's per million pounds) of aluminum scrap screened and milled

Lead .000 .000

Zinc .000 .000

Aluminum .000 .000

Ammonia (as N) .000 .000

(c) Subpart C—Dross Washing.

BAT Effluent Limitations

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average

mg/kg (pound's per million pounds) of dross washed

Lead 3.043 1.413

Zinc 11.090 4.565

Aluminum 66.410 29.450

Ammonia (as N) 1,449.000 636.900

(d) Subpart C—Demagging Wet Air Pollution Control.

BAT Effluent Limitations

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average

mg/kg (lb/million lbs) of aluminum demagged

Lead 0.216 0.100

Zinc 0.786 0.324

Aluminum 4.711 2.090

Ammonia (as N) 102.800 45.180

(e) Subpart C—Delacquering Wet Air Pollution Control.

BAT Effluent Limitations

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average

mg/kg (pound's per million pounds) of aluminum delacquered

Lead 0.093 0.043

Zinc 0.340 0.140

Aluminum 2.035 0.903

Ammonia (as N) 44.389 19.514

Total phenolics (4-AAP method) 1 0.004

1 At the source.

(f) Subpart C—Direct Chill Casting Contact Cooling.

BAT Effluent Limitations

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average

mg/kg (pounds per million pounds) of aluminum cast

Lead .372 .173

Zinc 1.356 .558

Aluminum 8.120 3.602

Ammonia (as N) 177.200 77.880

(g) Subpart C—Ingot Conveyor Casting Contact Cooling (When Chlorine Demagging Wet Air Pollution Control is Not Practiced On-Site).

BAT Effluent Limitations

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average

mg/kg (lb/million lbs) of aluminum cast

Lead 0.019 0.009

Zinc 0.068 0.028

Aluminum 0.409 0.182

Ammonia (as N) 8.931 3.926

(h) Subpart C—Ingot Conveyor Casting Contact Cooling (When Chloride Demagging Wet Air Pollution Control is Practiced On Site).

BAT Effluent Limitations

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average

mg/kg (pounds per million pounds) of aluminum cast

Lead .000 .000

Zinc .000 .000

Aluminum .000 .000

Ammonia (as N) .000 .000

(i) Subpart C—Stationary Casting Contact Cooling.

BAT Effluent Limitations

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average

mg/kg (pounds per million pounds) of aluminum cast

Lead .000 .000

Zinc .000 .000

Aluminum .000 .000

Ammonia (as N) .000 .000

(j) Subpart C—Shot Casting Contact Cooling.

BAT Effluent Limitations

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average

mg/kg (pounds per million pounds) of aluminum cast

Lead .000 .000

Zinc .000 .000

Aluminum .000 .000

Ammonia (as N) .000 .000