{"data":{"id":"us/40-cfr-471.51","jurisdiction":"us","citation":"40 CFR 471.51","heading":"Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT).","body":"Except as provided in 40 CFR 125.30 through 125.32, any existing point source subject to this subpart must achieve the following effluent limitations for the process operations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT):\n(a) Rolling spent neat oils and graphite based lubricants—subpart E—BPT. There shall be no discharge of process wastewater pollutants.\n(b) Rolling spent emulsions.\nSubpart E—BPT\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/off-kg (pounds per million off-pounds) of refractory metals rolled with emulsions\nCopper 0.815 0.429\nNickel 0.824 0.545\nFluoride 25.5 11.3\nMolybdenum 2.84 1.47\nOil and grease 8.58 5.15\nTSS 17.6 8.37\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(c) Drawing spent lubricants—subpart E—BPT. There shall be no discharge of process wastewater pollutants.\n(d) Extrusion spent lubricants—subpart E—BPT. There shall be no discharge of process wastewater pollutants.\n(e) Extrusion press hydraulic fluid leakage.\nSubpart E—BPT\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/off-kg (pounds per million off-pounds) of refractory metals extruded\nCopper 2.26 1.19\nNickel 2.29 1.51\nFluoride 70.8 31.4\nMolybdenum 7.87 4.07\nOil and grease 23.8 14.3\nTSS 48.8 23.2\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(f) Forging spent lubricants—subpart E—BPT. There shall be no discharge of process wastewater pollutants.\n(g) Forging contact cooling water.\nSubpart E—BPT\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/off-kg (pounds per million off-pounds) of forged refractory metals cooled with water\nCopper 0.614 0.323\nNickel 0.620 0.410\nFluoride 19.2 8.53\nMolybdenum 2.14 1.11\nOil and grease 6.46 3.88\nTSS 13.3 6.30\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(h) Equipment cleaning wastewater.\nSubpart E—BPT\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/off-kg (pounds per million off-pounds) of refractory metals formed\nCopper 2.59 1.36\nNickel 2.61 1.73\nFluoride 80.9 35.9\nMolybdenum 8.99 4.65\nOil and grease 27.2 16.3\nTSS 55.8 26.5\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(i) Metal powder production wastewater.\nSubpart E—BPT\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/off-kg (pounds per million off-pounds) of refractory metals powder produced\nCopper 0.534 0.281\nNickel 0.540 0.357\nFluoride 16.70 7.42\nMolybdenum 1.86 0.961\nOil and grease 5.62 3.37\nTSS 11.5 5.48\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(j) Metal powder production floor wash wastewater—subpart E—BPT. There shall be no discharge of process wastewater pollutants.\n(k) Metal powder pressing spent lubricants—subpart E—BPT. There shall be no discharge of process wastewater pollutants.\n(l) Surface treatment spent baths.\nSubpart E—BPT\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/off-kg (pounds per million off-pounds) of refractory metals surface treated\nCopper 0.739 0.389\nNickel 0.747 0.494\nFluoride 23.2 10.3\nMolybdenum 2.57 1.33\nOil and grease 7.78 4.68\nTSS 16.0 7.59\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(m) Surface treatment rinse.\nSubpart E—BPT\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/off-kg (pounds per million off-pounds) of refractory metals surface treated\nCopper 230 121\nNickel 232 154\nFluoride 7,200 3,200\nMolybdenum 800 414\nOil and grease 2,420 1,450\nTSS 4,960 2,360\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(n) Alkaline cleaning spent baths.\nSubpart E—BPT\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/off-kg (pounds per million off-pounds) of refractory metals alkaline cleaned\nCopper 0.635 0.334\nNickel 0.641 0.424\nFluoride 19.9 8.82\nMolybdenum 2.21 1.14\nOil and grease 6.68 4.01\nTSS 13.7 6.51\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(o) Alkaline cleaning rinse.\nSubpart E—BPT\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/off-kg (pounds per million off-pounds) of refractory metals alkaline cleaned\nCopper 1,550 816\nNickel 1,570 1,040\nFluoride 48,600 21,600\nMolybdenum 5,400 2,790\nOil and grease 16,300 9,790\nTSS 33,500 15,900\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(p) Molten salt rinse.\nSubpart E—BPT\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/off-kg (pounds per million off-pounds) of refractory metals treated with molten salt\nCopper 12.1 6.33\nNickel 12.2 8.04\nFluoride 377 167\nMolybdenum 41.9 21.7\nOil and grease 127 76.0\nTSS 260 124\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(q) Tumbling or burnishing wastewater.\nSubpart E—BPT\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/off-kg (pounds per million off-pounds) of refractory metals tumbled or burnished\nCopper 23.8 12.5\nNickel 24.0 15.9\nFluoride 744 330\nMolybdenum 82.7 42.8\nOil and grease 250 150\nTSS 513 244\npH (1) (1)\nWithin the range of 7.5 to 10.0 at all times.\n(r) Sawing or grinding spent neat oils—subpart E—BPT. There shall be no discharge of process wastewater pollutants.\n(s) Sawing or grinding spent emulsions.\nSubpart E—BPT\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/off-kg (pounds per million off-pounds) of refractory metals sawed or ground with emulsions\nCopper 0.565 0.297\nNickel 0.570 0.377\nFluoride 17.7 7.84\nMolybdenum 1.97 1.02\nOil and grease 5.94 3.57\nTSS 12.2 5.79\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(t) Sawing or grinding contact cooling water.\nSubpart E—BPT\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/off-kg (pounds per million off-pounds) of refractory metals sawed or ground with contact cooling water\nCopper 46.2 24.3\nNickel 46.7 30.9\nFluoride 1450 642\nMolybdenum 161 83.1\nOil and grease 486 292\nTSS 997 474\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(u) Sawing or grinding rinse.\nSubpart E—BPT\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/off-kg (pounds per million off-pounds) of sawed or ground refractory metals rinsed\nCopper 0.257 0.135\nNickel 0.259 0.172\nFluoride 8.03 3.57\nMolybdenum 0.893 0.462\nOil and grease 2.70 1.62\nTSS 5.54 2.63\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(v) Wet air pollution control scrubber blowdown.\nSubpart E—BPT\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/off-kg (pounds per million off-pounds) of refractory metals sawed or ground, surface coated or surface treated\nCopper 1.50 0.787\nNickel 1.51 1.00\nFluoride 46.8 20.8\nMolybdenum 5.20 2.69\nOil and grease 15.8 9.45\nTSS 32.3 15.4\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(w) Miscellaneous wastewater sources.\nSubpart E—BPT\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/off-kg (pounds per million off-pounds) of refractory metals formed\nCopper 0.656 0.345\nNickel 0.663 0.438\nFluoride 20.6 9.11\nMolybdenum 2.28 1.18\nOil and grease 6.9 4.14\nTSS 14.2 6.73\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(x) Dye penetrant testing wastewater.\nSubpart E—BPT\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/off-kg (pounds per million off-pounds) of refractory metals tested\nCopper 0.150 0.078\nNickel 0.150 0.099\nFluoride 4.60 2.00\nMolybdenum 0.513 0.266\nOil and grease 1.60 0.930\nTSS 3.20 1.50\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(y) Degreasing spent solvents—subpart E—BPT. There shall be no discharge of process wastewater pollutants.","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER N—EFFLUENT GUIDELINES AND STANDARDS","PART 471—NONFERROUS METALS FORMING AND METAL POWDERS POINT SOURCE CATEGORY","Subpart E—Refractory Metals Forming 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":"2a029457df3a998c48a15e72bb53f12816a23e241d27cf5da223a923c8277405","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-471.50","next":"us/40-cfr-471.52"},"notice":"GroundRules: Original legal text. Not legal advice."}