{"data":{"id":"us/40-cfr-464.25","jurisdiction":"us","citation":"40 CFR 464.25","heading":"Pretreatment standards for existing sources.","body":"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.\n(a) Casting Quench Operations.\nPSES\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nkg/1000 kkg (pounds per million pounds) of metal poured\nCopper (T) 0.0307 0.0168\nLead (T) 0.0211 0.0104\nZinc (T) 0.0303 0.0116\nTTO 0.0335 0.0109\nOil and grease (for alternate monitoring) 1.2 0.399\n(b) Direct Chill Casting Operations.\nPSES\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nkg/1,000 kkg (pounds per million pounds) of metal poured\nCopper (T) 0.928 0.506\nLead (T) 0.639 0.314\nZinc (T) 0.916 0.35\n(c) Dust Collection Scrubber Operations.\nPSES\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nkg/62.3 million Sm 3 (pounds per billion SCF) of air scrubbed\nCopper (T) 0.552 0.301\nLead (T) 0.38 0.187\nZinc (T) 0.545 0.208\nTotal phenols 0.617 0.215\nTTO 1.65 0.54\nOil and grease (for alternate monitoring) 21.5 7.18\n(d) Grinding Scrubber Operations. No discharge of process wastewater pollutants to a POTW.\n(e) Investment Casting.\nPSES\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nkg/1,000 kkg (pounds per million pounds) of metal poured\nCopper (T) 8.48 4.63\nLead (T) 5.84 2.86\nZinc (T) 8.37 3.19\nTTO 25.4 8.29\nOil and grease for alternate monitoring) 330 110\n(f) Melting Furnace Scrubber Operations.\nPSES\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nkg/62.3 million Sm3 (pounds per billion SCF) of air scrubbed\nCopper (T) 1.81 0.988\nLead (T) 1.25 0.612\nZinc (T) 1.79 0.673\nTotal phenols 2.02 0.706\nTTO 5.41 1.77\nOil and grease (for alternate monitoring) 70.6 23.5\n(g) Mold Cooling Operations.\nPSES\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nkg/1,000 kkg (pounds per million pounds) of metal poured\nCopper (T) 0.392 0.214\nLead (T) 0.27 0.132\nZinc (T) 0.387 0.148\nTTO 0.428 0.14\nOil and grease (for alternate monitoring) 15.3 5.09","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER N—EFFLUENT GUIDELINES AND STANDARDS","PART 464—METAL MOLDING AND CASTING POINT SOURCE CATEGORY","Subpart B—Copper Casting 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":"5a282c34da891203a4005035374f32d1f3a7ec173cce4dd3a366bb08bfdb01a0","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-464.24","next":"us/40-cfr-464.26"},"notice":"GroundRules: Original legal text. Not legal advice."}