{"data":{"id":"us/40-cfr-471.101","jurisdiction":"us","citation":"40 CFR 471.101","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) Metal powder production atomization wastewater.\nSubpart J—BPT\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/off-kg (pounds per million off-pounds) of powder wet atomized\nCopper 9.58 5.04\nCyanide 1.46 0.605\nLead 2.12 1.01\nOil and grease 101 60.5\nTSS 207 98.3\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(b) Sizing spent emulsion.\nSubpart J—BPT\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/off-kg (pounds per million off-pounds) of powder sized\nCopper 0.028 0.015\nCyanide 0.004 0.002\nLead 0.006 0.003\nOil and grease 0.292 0.175\nTSS 0.599 0.285\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(c) Oil-resin impregnation wastewater—subpart J—BPT. There shall be no discharge of process wastewater pollutants.\n(d) Steam treatment wet air pollution control scrubber blowdown.\nSubpart J—BPT\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/off-kg (pounds per million off-pounds) of power metallurgy parts steam treated\nCopper 1.51 0.792\nCyanide 0.230 0.095\nLead 0.333 0.159\nOil and grease 15.9 9.51\nTSS 32.5 15.5\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(e) Tumbling, burnishing and cleaning wastewater.\nSubpart J—BPT\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/off-kg (pounds per million off-pounds) of powder metallurgy parts tumbled, burnished, or cleaned\nCopper 8.36 4.40\nCyanide 1.28 0.528\nLead 1.85 0.880\nOil and grease 88.0 52.800\nTSS 181 85.8\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(f) Sawing or grinding spent neat oils—subpart J—BPT. There shall be no discharge of process wastewater pollutants.\n(g) Sawing or grinding spent emulsion.\nSubpart J—BPT\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/off-kg (pounds per million off-pounds) of powder metallurgy parts sawed or ground with emulsion\nCopper 0.035 0.018\nCyanide 0.005 0.002\nLead 0.008 0.004\nOil and grease 0.362 0.217\nTSS 0.742 0.353\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(h) Sawing or grinding contact cooling water.\nSubpart J—BPT\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/off-kg (pounds per million off-pounds) of powder metallurgy parts sawed or ground with contact cooling\nCopper 3.08 1.62\nCyanide 0.470 0.195\nLead 0.681 0.324\nOil and grease 32.4 19.5\nTSS 66.4 31.6\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(i) Hot pressing contact cooling water.\nSubpart J—BPT\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/off-kg (pounds per million off-pounds) of powder cooled after pressing\nCopper 16.7 8.80\nCyanide 2.55 1.06\nLead 3.70 1.76\nOil and grease 176 106\nTSS 361 172\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(j) Mixing wet air pollution control scrubber blowdown.\nSubpart J—BPT\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/off-kg (pounds per million off-pounds) of powder mixed\nCopper 15.0 7.90\nCyanide 2.29 0.948\nLead 3.32 1.58\nOil and grease 158 94.8\nTSS 324 154\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(k) Degreasing spent solvents—subpart J—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 J—Metals Powders 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":"4aab34c0794b8fbe2d7ecea43dda6a12774ff78288c9b41f837ad9e30ffc56f7","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-471.100","next":"us/40-cfr-471.102"},"notice":"GroundRules: Original legal text. Not legal advice."}