{"data":{"id":"us/40-cfr-464.24","jurisdiction":"us","citation":"40 CFR 464.24","heading":"New source performance standards.","body":"Any new source subject to this subpart must achieve the following new source performance standards (NSPS), except that non-continuous dischargers shall not be subject to the maximum day and maximum for monthly average mass (kg/1,000 kkg or lb/million lb of metal poured; kg/62.3 million Sm 3 or lb/billion SCF of air scrubbed) effluent standards for copper, lead, zinc, total phenols, oil and grease, and TSS. For non-continuous dischargers, annual average mass standards and maximum day and maximum for monthly average concentration (mg/l) standards shall apply. Concentration standards and annual average mass standards shall only apply to non-continuous dischargers.\n(a) Casting Quench Operations.\nNSPS\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) 0.0307 0.0168\nLead (T) 0.0211 0.0104\nZinc (T) 0.0303 0.0116\nOil and grease 1.2 0.399\nTSS 0.598 0.479\npH (1) (1)\n1 Within the range of 7.0 to 10.0 at all times.\nMaximum for any 1 day Maximum for monthly average Annual average 1\n(mg/l) 2 (mg/l) 2\nCopper (T) 0.77 0.42 0.0068\nLead (T) 0.53 0.26 0.006\nZinc (T) 0.76 0.29 0.0072\nOil and grease 30 10 0.199\nTSS 15 12 0.104\npH (3) (3) (3)\n1 kg/1,000 kkg (pounds per million pounds) of metal poured.\n2 These concentrations must be multiplied by the ratio of (4.8/x) where x is the actual normalized process wastewater flow (in gallons per 1,000 pounds of metal poured) for a specific plant.\n3 Within the range of 7.0 to 10.0 at all times.\n(b) Direct Chill Casting Operations.\nNSPS\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\nOil and grease 36.2 12.1\nTSS 18.1 14.5\npH (1) (1)\n1 Within the range of 7.0 to 10.0 at all times.\nMaximum for any 1 day Maximum for monthly average Annual average 1\n(mg/l) 2 (mg/l) 2\nCopper (T) 0.77 0.42 0.205\nLead (T) 0.53 0.26 0.181\nZinc (T) 0.76 0.29 0.217\nOil and grease 30 10 6.03\nTSS 15 12 3.13\npH (3) (3) (3)\n1 kg/1,000 kkg (pounds per million pounds) of metal poured.\n2 These concentrations must be multiplied by the ratio of (145/x) where x is the actual normalized process wastewater flow (in gallons per 1,000 pounds of metal poured) for a specific plant.\n3 Within the range of 7.0 to 10.0 at all times.\n(c) Dust Collection Scrubber Operations.\nNSPS\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) 0.553 0.301\nLead (T) 0.38 0.187\nZinc (T) 0.545 0.208\nTotal phenols 0.617 0.215\nOil and grease 21.5 7.18\nTSS 10.8 8.61\npH (1) (1)\n1 Within the range of 7.0 to 10.0 at all times.\nMaximum for any 1 day Maximum for monthly average Annual average 1\n(mg/l) 2 (mg/l) 2\nCopper (T) 0.77 0.42 0.122\nLead (T) 0.53 0.26 0.108\nZinc (T) 0.76 0.29 0.129\nTotal phenols 0.86 0.3 0.144\nOil and grease 30 10 3.59\nTSS 15 12 1.87\npH (3) (3) (3)\n1 kg/62.3 million Sm 3 (pounds per billion SCF) of air scrubbed.\n2 These concentrations must be multiplied by the ratio of (0.086/x) where x is the actual normalized process wastewater flow (in gallons per 1,000 SCF of air scrubbed) for a specific plant.\n3 Within the range of 7.0 to 10.0 at all times.\n(d) Grinding Scrubber Operations. No discharge of process wastewater pollutants to navigable waters.\n(e) Investment Casting.\nNSPS\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nkg/1,000 kkg (pounds per millions pounds) of metal poured\nCopper (T) 8.48 4.63\nLead (T) 5.84 2.86\nZinc (T) 8.37 3.19\nOil and grease 330 110\nTSS 165 132\npH (1) (1)\n1 Within the range of 7.0 to 10.0 at all times.\nMaximum for any 1 day Maximum for monthly average Annual average 1\n(mg/l) 2 mg/l) 2\nCopper (T) 0.77 0.42 1.87\nLead (T) 0.53 0.26 1.65\nZinc (T) 0.76 0.29 1.98\nOil and grease 30 10 55.1\nTSS 15 12 28.6\npH (3) (3) (3)\n1 kg/1,000 kkg (pounds per million pounds) of metal poured.\n2 These concentrations must be multiplied by the ratio of (1,320/x) where x is the actual normalized process wastewater flow (in gallons per 1,000 pounds of metal poured) for a specific plant.\n3 Within the range of 7.0 to 10.0 at all times.\n(f) Melting Furnace Scrubber Operations.\nNSPS\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) 1.81 0.988\nLead (T) 1.25 0.612\nZinc (T) 1.79 0.673\nTotal phenols 2.02 0.706\nOil and grease 70.6 23.5\nTSS 35.3 28.2\npH (1) (1)\n1 Within the range of 7.0 to 10.0 at all times.\nMaximum for any 1 day Maximum for monthly average Annual average 1\n(mg/l) 2 (mg/l) 2\nCopper (T) 0.77 0.42 0.4\nLead (T) 0.53 0.26 0.353\nZinc (T) 0.76 0.29 0.424\nTotal phenols 0.86 0.3 0.471\nOil and grease 30 10 11.8\nTSS 15 12 6.12\npH (3) (3) (3)\n1 kg/62.3 Sm 3 (pounds per billion SCF) of air scrubbed.\n2 These concentrations must be multiplied by the ratio of (0.282/x) where x is the actual normalized process waste-water flow (in gallons per 1,000 SCF of air scrubbed) for a specific plant.\n3 Within the range of 7.0 to 10.0 at all times.\n(g) Mold Cooling Operations.\nNSPS\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\nOil and grease 15.3 5.09\nTSS 7.63 6.11\npH (1) (1)\n1 Within the range of 7.0 to 10.0 at all times.\nMaximum for any 1 day Maximum for monthly average Annual average 1\n(mg/1) 2 (mg/1) 2\nCopper (T) 0.77 0.42 0.0865\nLead (T) 0.53 0.26 0.0763\nZinc (T) 0.76 0.29 0.0916\nOil and grease 30 10 2.54\nTSS 15 12 1.32\npH (3) (3) (3)\n1 kg/1,000 kkg (pounds per million pound) of metal poured.\n2 These concentrations must be multiplied by the ratio of (61/x) where x is the actual normalized process waste-water flow (in gallons per 1,000 pounds of metal poured) for a specific plant.\n3 Within the range of 7.0 to 10.0 at all times.","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":"3eda51d51598439ae7eb6d99e90c8ae06f21c0bd4f563d6c5cab57e86654573a","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-464.23","next":"us/40-cfr-464.25"},"notice":"GroundRules: Original legal text. Not legal advice."}