{"data":{"id":"us/40-cfr-464.34","jurisdiction":"us","citation":"40 CFR 464.34","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/1,000 kkg or lb/million lb of sand reclaimed; 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 Cleaning Operations. (1) Applicable to plants that are casting primarily ductile or gray iron and to plants that are casting primarily malleable iron where greater than 3,557 tons of metal are poured per year.\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) 0.0129 0.0071\nLead (T) 0.0237 0.0116\nZinc (T) 0.0437 0.0165\nOil and grease 1.34 0.446\nTSS 0.67 0.536\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) 0.29 0.16 0.0029\nLead (T) 0.53 0.26 0.0067\nZinc (T) 0.98 0.37 0.0116\nOil and grease 30 10 0.223\nTTS 15 12 0.116\npH (3) (3) (3)\n1 kg/1000 kkg (pounds per million pounds) of metal poured.\n2 These concentrations must be multiplied by the ratio of (5.33/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(2) Applicable to plants that are casting primarily steel and to plants that are casting primarily malleable iron where equal to or less than 3,557 tons of metal are poured per year.\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) 0.0129 0.0071\nLead (T) 0.0353 0.0174\nZinc (T) 0.0656 0.025\nOil and grease 1.34 0.446\nTSS 1.7 0.67\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) 0.29 0.16 0.0029\nLead (T) 0.79 0.39 0.0098\nZinc (T) 1.47 0.56 0.0179\nOil and grease 30 10 0.223\nTTS 38 15 0.446\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 (5.35/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) Casting Quench Operations. (1) Applicable to plants that are casting primarily ductile or gray iron and to plants that are casting primarily malleable iron where greater than 3,557 tons of metal are poured per year.\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) 0.0138 0.0076\nLead (T) 0.0252 0.0124\nZinc (T) 0.0466 0.0176\nOil and grease 1.43 0.476\nTSS 0.713 0.571\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) 0.29 0.16 0.0031\nLead (T) 0.53 0.26 0.0071\nZinc (T) 0.98 0.37 0.0124\nOil and grease 30 10 0.238\nTSS 15 12 0.124\npH (3) (3) (3)\n1 Kg/1000 kkg (pounds per million pounds) of metal poured.\n2 Within the range of 7.0 to 10.0 at all times.\n3 These concentrations must be multiplied by the ratio of (5.7/x) where x is the actual normalized process wastewater flow (in gallons per 1,000 pounds of metal poured) for a specific plant.\n(2) Applicable to plants that are casting primarily steel and to plants that are casting primarily malleable iron where equal to or less than 3,557 tons of metal are poured per year.\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) 0.0138 0.0076\nLead (T) 0.0376 0.0185\nZinc (T) 0.0699 0.0266\nOil and grease 1.43 0.476\nTSS 1.81 0.713\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) 0.29 0.16 0.0031\nLead (T) 0.79 0.39 0.0105\nZinc (T) 1.47 0.56 0.019\nOil and grease 30 10 0.238\nTSS 38 15 0.476\npH (3) (3) (3)\n1 Kg/1000 kkg (pounds per million pounds) of metal poured.\n2 These concentrations must be multiplied by the ratio of (5.7/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. (1) Applicable to plants that are casting primarily ductible or gray iron and to plants that are casting primarily malleable iron where greater than 3,557 tons of metal are poured per year.\nNSPS\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) 0.218 0.12\nLead (T) 0.398 0.195\nZinc (T) 0.736 0.278\nTotal Phenols 0.646 0.225\nOil and grease 22.5 7.51\nTSS 11.3 9.01\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) 0.29 0.16 0.0488\nLead (T) 0.53 0.26 0.113\nZinc (T) 0.98 0.37 0.195\nTotal phenols 0.86 0.3 0.15\nOil and grease 30 10 3.76\nTSS 15 12 1.95\npH (3) (3) (3)\n1 kg/62.3 millions Sm3 (pound per billion SCF) of air scrubbed.\n2 Within the range of 7.0 to 10.0 at all times.\n3 These concentrations must be multiplied by the ratio of (0.09/x) where x is the actual normalized process wastewater flow (in gallons per 1,000 SCF of air scrubbed) for a specific plant.\n(2) Applicable to plants that are casting primarily steel and to plants that are casting primarily malleable iron where equal to or less than 3,557 tons of metal are poured per year.\nNSPS\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) 0.218 0.12\nLead (T) 0.593 0.293\nZinc (T) 1.1 0.421\nTotal phenols 0.656 0.225\nOil and grease 22.5 7.51\nTSS 28.5 11.3\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) 0.29 0.16 0.0488\nLead (T) 0.79 0.39 0.165\nZinc (T) 1.47 0.56 0.3\nTotal phenols 0.86 0.3 0.15\nOil and grease 30 10 3.76\nTSS 38 15 7.51\npH (3) (3) (3)\n1 kg/62.3 millions Sm3 (pound per billion SCF) of air scrubbed.\n2 Within the range of 7.0 to 10.0 at all times.\n3 These concentrations must be multiplied by the ratio of (0.09/) where is the actual normalized process wastewater flow (in gallons per 1,000 SCF of air scrubbed) for a specific plant.\n(d) Grinding Scrubber Operations. No discharge of process wastewater pollutants to navigable waters.\n(e) Investment Casting. (1) Applicable to plants that are casting primarily ductile or gray iron and to plants that are casting primarily malleable iron where greater than 3,557 tons of metal are poured per year.\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) 3.19 1.76\nLead (T) 5.84 2.86\nZinc (T) 10.8 4.07\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) 0.29 0.16 0.716\nLead (T) 0.53 0.26 1.65\nZinc (T) 0.98 0.37 2.86\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(2) Applicable to plants that are casting primarily steel and to plants that are casting primarily malleable iron where equal to or less than 3,557 tons of metal are poured per year.\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) 3.19 1.76\nLead (T) 8.7 4.3\nZinc (T) 16.2 6.17\nOil and grease 330 110\nTSS 419 165\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) 0.29 0.16 0.716\nLead (T) 0.79 0.39 2.42\nZinc (T) 1.47 0.56 4.41\nOil and grease 30 10 55.1\nTSS 38 15 110\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. (1) Applicable to plants that are casting primarily ductile or gray iron and to plants that are casting primarily malleable iron where greater than 3,557 tons of metal are poured per year.\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) 1.02 0.561\nLead (T) 1.86 0.911\nZinc (T) 3.44 1.30\nTotal phenols 3.01 1.05\nOil and grease 105 35\nTSS 52.6 42.1\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\n(mg/l) 2 (mg/l) 2\nCopper (T) 0.29 0.16 0.228\nLead (T) 0.53 0.26 0.526\nZinc (T) 0.98 0.37 0.911\nTotal phenols 0.86 0.3 0.701\nOil and grease 30 10 17.5\nTSS 15 12 9.11\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 (0.42/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(2) Applicable to plants that are casting primarily steel and to plants that are casting primarily malleable iron where equal to or less than 3,557 tons of metal are poured per year.\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) 1.02 0.561\nLead (T) 2.77 1.37\nZinc (T) 5.15 1.96\nTotal phenols 3.01 1.05\nOil and grease 105 35\nTSS 133 52.6\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\n(mg/l) 2 (mg/l) 2\nCopper (T) 0.29 0.16 0.228\nLead (T) 0.79 0.39 0.771\nZinc (T) 1.47 0.56 1.4\nTotal phenols 0.38 0.3 0.701\nOil and grease 30 10 17.5\nTSS 38 15 35\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 (0.42/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(g) Mold Cooling Operations. (1) Applicable to plants that are casting primarily ductile or gray iron and to plants that are casting primarily malleable iron where greater than 3,557 tons of metal are poured per year.\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) 0.0428 0.0236\nLead (T) 0.0783 0.0384\nZinc (T) 0.0145 0.0546\nOil and grease 4.43 1.48\nTSS 2.22 1.77\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) 1\nCopper (T) 0.29 0.16 0.0096\nLead (T) 0.53 0.26 0.0222\nZinc (T) 0.98 0.37 0.0384\nOil and grease 30 10 0.738\nTSS 15 12 0.384\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 (17.7/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(2) Applicable to plants that are casting primarily steel and to plants that are casting primarily malleable iron where equal to or less than 3,557 tons of metal are poured per year.\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) 0.0428 0.0236\nLead (T) 0.117 0.0576\nZinc (T) 0.217 0.0827\nOil and grease 4.43 1.48\nTSS 5.61 2.22\npH (1) (1)\n1 Within the range of 7.0 to 10.0 at all times.\nMaximum for any 1 day Maxium for monthly average Annual average 1\n(mg/1) 2 (mg/l) 2\nCopper (T) 0.29 0.16 0.0096\nLead (T) 0.79 0.39 0.0325\nZinc (T) 1.47 0.56 0.0591\nOil and grease 30 10 0.738\nTSS 38 15 1.48\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 (17.7/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(h) Slag Quench Operations. (1) Applicable to plants that are casting primarily ductile or gray iron and to plants that are casting primarily malleable iron where greater than 3,557 tons of metal are poured per year.\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) 0.0527 0.0291\nLead (T) 0.0964 0.0473\nZinc (T) 0.178 0.0673\nOil and grease 5.46 1.82\nTSS 2.73 2.18\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) 0.29 0.16 0.0118\nLead (T) 0.53 0.26 0.0273\nZinc (T) 0.98 0.37 0.0473\nOil and grease 30 10 0.909\nTSS 15 12 0.473\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 (21.8/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(2) Applicable to plants that are casting primarily steel and to plants that are casting primarily malleable iron where equal to or less than 3,557 tons of metal are poured per year.\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) 0.0527 0.0291\nLead (T) 0.144 0.0709\nZinc (T) 0.267 0.102\nOil and grease 5.46 1.82\nTSS 6.91 2.73\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\n(mg/l) 2 (mg/1) 2\nCopper (T) 0.29 0.16 0.0118\nLead (T) 0.79 0.39 0.04\nZinc (T) 1.47 0.56 0.0728\nOil and grease 30 10 0.909\nTSS 38 15 1.82\npH (3) (3) (3)\n1 kg/1000 kkg (pounds per million pounds) of metal poured.\n2 These concentrations must be multiplied by the ratio of (21.8/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(i) Wet Sand Reclamation Operations. (1) Applicable to plants that are casting primarily ductile or gray iron and to plants that are casting primarily malleable iron where greater than 3,557 tons of metal are poured per year.\nNSPS\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nkg/1,000 kkg (pounds per million pounds) of sand reclaimed\nCopper (T) 0.217 0.12\nLead (T) 0.396 0.194\nZinc (T) 0.732 0.276\nTotal phenols 0.642 0.224\nOil and grease 22.4 7.47\nTSS 11.2 8.96\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) 0.29 0.16 0.0485\nLead (T) 0.53 0.26 0.112\nZinc (T) 0.98 0.37 0.194\nTotal phenols 0.86 0.3 0.149\nOil and grease 30 10 3.73\nTSS 15 12 1.94\npH (3) (3) (3)\n1 kg/1,000 kkg (pounds per million pounds) of sand reclaimed.\n2 These concentrations must be multiplied by the ratio of (89.5/x) where x is the actual normalized process wastewater flow (in gallons per 1,000 pounds of sand reclaimed) for a specific plant.\n3 Within the range of 7.0 to 10.0 at all times.\n(2) Applicable to plants that are casting primarily steel and to plants that are casting primarily malleable iron where equal to or less than 3,557 tons of metal are poured per year.\nNSPS\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nkg/1,000 kkg (pounds per million pounds) of sand reclaimed\nCopper (T) 0.217 0.12\nLead (T) 0.59 0.291\nZinc (T) 1.1 0.418\nTotal phenols 0.642 0.224\nOil and grease 22.4 7.47\nTSS 28.4 11.2\npH (1) (1)\n1 Within the range of 7.0 to at all times.\nMaximum for any 1 day Maximum for monthly average Annual average 1\n(mg/l)2 (mg/l)2\nCopper (T) 0.29 0.16 0.0485\nLead (T) 0.79 0.39 0.164\nZinc (T) 1.47 0.56 0.299\nTotal phenols 0.86 0.3 0.149\nOil and grease 30 10 3.73\nTSS 38 15 7.47\npH (3) (3) (3)\n1 kg/1,000 kkg (pounds per million pounds) of sand reclaimed.\n2 These concentrations must be multiplied by the ratio of (89.5/x) where x is the actual normalized process wastewater flow (in gallons per 1,000 pounds of sand reclaimed) 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 C—Ferrous 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":"eeae56d97703cc9173b27e40c4e9bcaf8d1ef828a21e1ac08317b774be797117","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-464.33","next":"us/40-cfr-464.35"},"notice":"GroundRules: Original legal text. Not legal advice."}