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 [49 FR 8796, Mar. 8, 1984; 49 FR 26739, June 29, 1984, as amended at 49 FR 29794, July 24, 1984; 52 FR 25559, July 7, 1987]