{"data":{"id":"us/40-cfr-421.36","jurisdiction":"us","citation":"40 CFR 421.36","heading":"Pretreatment standards for new sources.","body":"Except as provided in 40 CFR 403.7, any new 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 new sources. The mass of wastewater pollutants introduced in secondary aluminum process wastewater into a POTW shall not exceed the following values:\n(a) Subpart C—Scrap Drying Wet Air Pollution Control.\nPSNS\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of aluminum scrap dried\nLead .000 .000\nZinc .000 .000\nAmmonia (as N) .000 .000\n(b) Subpart C—Scrap Screening and Milling.\nPSNS\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of aluminum scrap screened and milled\nLead .000 .000\nZinc .000 .000\nAmmonia (as N) .000 .000\n(c) Subpart C—Dross Washing.\nPSNS\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of dross washed\nLead .000 .000\nZinc .000 .000\nAmmonia (as N) .000 .000\n(d) Subpart C—Demagging Wet Air Pollution Control.\nPSNS\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (lb/million lbs) of aluminum demagged\nLead 0.216 0.100\nZinc 0.786 0.324\nAmomonia (as N) 102.800 45.180\n(e) Subpart C—Delacquering Wet Air Pollution Control\nPSNS\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of aluminum delacquered\nLead 0.093 0.043\nZinc 0.340 0.140\nAmmonia (as N) 44.389 19.514\nTotal phenolics (4-AAP method) 1 0.004\n1 At the source.\n(f) Subpart C—Direct Chill Casting Contact Cooling.\nPSNS\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of aluminum cast\nLead .372 .173\nZinc 1.356 .558\nAmmonia (as N) 177.200 77.880\n(g) Subpart C—Ingot Conveyor Casting Control Cooling (When Chlorine Demagging Wet Air Pollution Control is Not Practiced On-Site).\nPSNS\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (lb/million lbs) of aluminum cast\nLead 0.019 0.009\nZinc 0.068 0.028\nAmomonia (as N) 8.931 3.926\n(h) Subpart C—Ingot Conveyor Casting Contact Cooling (When Chlorine Demagging Wet Air Pollution Control Is Practiced on Site).\nPSNS\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of aluminum cast\nLead .000 .000\nZinc .000 .000\nAmmonia (as N) .000 .000\n(i) Subpart C—Stationary Casting Contact Cooling.\nPSNS\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of aluminum cast\nLead .000 .000\nZinc .000 .000\nAmmonia (as N) .000 .000\n(j) Subpart C—Shot Casting Contact Cooling.\nPSNS\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of aluminum cast\nLead .000 .000\nZinc .000 .000\nAmmonia (as N) .000 .000","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER N—EFFLUENT GUIDELINES AND STANDARDS","PART 421—NONFERROUS METALS MANUFACTURING POINT SOURCE CATEGORY","Subpart C—Secondary Aluminum Smelting Subcategory"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-40.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:04Z","sha256":"ff61791aec9206ffc4a71b5be241ca849cca2f52aaac1f5c612b4420c31653cb","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-421.35","next":"us/40-cfr-421.37"},"notice":"GroundRules: Original legal text. Not legal advice."}