{"data":{"id":"us/40-cfr-421.212","jurisdiction":"us","citation":"40 CFR 421.212","heading":"Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.","body":"Except as provided in 40 CFR 125.30 through 125.32, any existing point source subject to this subpart shall achieve the following effluent limitation representing the degree of effluent reduction attainable by the application of the best practicable technology currently available:\n(a) Molybdenum sulfide leachate.\nBPT Limitations for the Primary Molybdenum Rhenium Subcategory\nPollutant or pollutant property Maximum for any 1 day Maximum monthly average\nmg/kg (pounds per million pounds) of molybdenum sulfide leached\nArsenic 0.968 0.431\nLead 0.195 0.093\nNickle 0.889 0.588\nSelenium 0.570 0.255\nMolybdenum [Reserved] [Reserved].\nAmmonia (as N) 61.720 27.130\nFluoride 16.210 9.214\nTotal suspended solids 18.980 9.029\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(b) Roaster SO2 scrubber.\nBPT Limitations for the Primary Molybdenum and Rhenium Subcategory\nPollutant of pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of molybdenum sulfide roasted\nArsenic 3.509 1.561\nLead 0.705 0.336\nNickel 3.224 2.133\nSelenium 2.065 0.924\nMolybdenum [Reserved] [Reserved].\nAmmonia (as N) 223.800 98.390\nFluoride 58.770 33.410\nTotal suspended solids 68.840 32.740\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(c) Molybdic oxide leachate.\nBPT Limitations for the Primary Molybdenum and Rhenium Subcategory\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of molybdenum contained in molybdic oxide leached\nArsenic 24.210 10.770\nLead 4.865 2.317\nNickel 22.240 14.710\nSelenium 14.250 6.371\nMolybdenum [Reserved] [Reserved]\nAmmonia (as N) 1,544.000 678.800\nFluoride 405.400 230.500\nTotal suspended solids 474.900 225.900\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(d) Hydrogen reduction furnace scrubber.\nBPT Limitations for the Primary Molybdenum and Rhenium Subcategory\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of molybdenum metal powder produced\nArsenic 47.860 21.300\nLead 9.617 4.580\nNickel 43.970 29.080\nSelenium 28.170 12.600\nMolybdenum [Reserved] [Reserved]\nAmmonia (as N) 3,052.000 1,342.000\nFluoride 801.400 455.700\nTotal suspended solids 938.800 446.500\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(e) Depleted rhenium scrubbing solution.\nBPT Limitations for the Primary Molybdenum and Rhenium Subcategory\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of molybdenum sulfide roasted\nArsenic 1.497 0.666\nLead 0.301 0.143\nNickel 1.375 0.909\nSelenium 0.881 0.394\nMolybdenum [Reserved] [Reserved]\nAmmonia (as N) 95.440 41.960\nFluoride 25.060 14.250\nTotal suspended solids 29.360 13.960\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER N—EFFLUENT GUIDELINES AND STANDARDS","PART 421—NONFERROUS METALS MANUFACTURING POINT SOURCE CATEGORY","Subpart S—Primary Molybdenum and Rhenium 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":"46cd5d75a7f71ae8e532792a388f052d7e6265c3e711a150791cce1ef99d9e07","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-421.211","next":"us/40-cfr-421.213"},"notice":"GroundRules: Original legal text. Not legal advice."}