[Code of Federal Regulations] [Title 40, Volume 26] [Revised as of July 1, 2003] From the U.S. Government Printing Office via GPO Access [CITE: 40CFR421.35] [Page 475-476] TITLE 40-PROTECTION OF ENVIRONMENT CHAPTER I-ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PART 421-NONFERROUS METALS MANUFACTURING POINT SOURCE CATEGORY--Table of Contents Subpart C-Secondary Aluminum Smelting Subcategory Sec. 421.35 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 ------------------------------------------------------------------------ Maximum for Pollutant or pollutant property Maximum for monthly any 1 day 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 ------------------------------------------------------------------------ Maximum for Pollutant or pollutant property Maximum for monthly any 1 day 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 ------------------------------------------------------------------------ Maximum for Pollutant or pollutant property Maximum for monthly any 1 day 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 ------------------------------------------------------------------------ Maximum for Pollutant or pollutant property Maximum for monthly any 1 day 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 ------------------------------------------------------------------------ Maximum for Pollutant or pollutant property Maximum for monthly any 1 day 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. [[Page 476]] PSES ------------------------------------------------------------------------ Maximum for Pollutant or pollutant property Maximum for monthly any 1 day 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 ------------------------------------------------------------------------ Maximum for Pollutant or pollutant property Maximum for monthly any 1 day 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 ------------------------------------------------------------------------ Maximum for Pollutant or pollutant property Maximum for monthly any 1 day 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 ------------------------------------------------------------------------ Maximum for Pollutant or pollutant property Maximum for monthly any 1 day 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 ------------------------------------------------------------------------ Maximum for Pollutant or pollutant property Maximum for monthly any 1 day 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]