Pretreatment standards for existing sources.

Except as provided in 40 CFR 403.7 and 403.13, any existing source subject to this subpart which introduces pollutants into a publicly owned treatment works must comply with 40 CFR part 403 and achieve the following pretreatment standards for existing sources. The mass of wastewater pollutants in secondary aluminum process wastewater introduced into a POTW shall not exceed the following values: (a) Subpart C—Scrap Drying Wet Air Pollution Control. PSES Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of aluminum scrap dried Lead .000 .000 Zinc .000 .000 Ammonia (as N) .000 .000 (b) Subpart C—Scrap Screening and Milling. PSES Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of aluminum scrap screened and milled Lead .000 .000 Zinc .000 .000 Ammonia (as N) .000 .000 (c) Subpart C—Dross Washing. PSES Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of dross washed Lead 3.043 1.413 Zinc 11.090 4.565 Ammonia (as N) 1,449.000 636.000 (d) Subpart C—Demagging Wet Air Pollution Control. PSES 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 Amomonia (as N) 102.800 45.180 (e) Subpart C—Delacquering Wet Air Pollution Control. PSES Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of aluminum delacquered Lead 0.093 0.043 Zinc 0.340 0.140 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. PSES 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 Ammonia (as N) 177.200 77.800 (g) Subpart C—Ingot Conveyor Casting Contact Cooling (When Chlorine Demagging Wet Air Pollution Control is Not Practiced On-Site). PSES 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 Amomonia (as N) 8.931 3.926 (h) Subpart C—Ingot Conveyor Casting Contact Cooling. (When Chlorine Demagging Wet Air Pollution Control is Practiced On Site.) PSES 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 Ammonia (as N) .000 .000 (i) Subpart C—Stationary Casting Contact Cooling. PSES 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 Ammonia (as N) .000 .000 (j) Subpart C—Shot Casting Contact Cooling. PSES 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 Ammonia (as N) .000 .000 [49 FR 8796, Mar. 8, 1984, as amended at 49 FR 29794, July 24, 1984; 52 FR 25560, July 7, 1987]