{"data":{"id":"us/40-cfr-421.222","jurisdiction":"us","citation":"40 CFR 421.222","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 limitations representing the degree of effluent reduction attainable by the application of the best practicable technology currently available:\n(a) Leach tailings.\nBPT Limitations for the Secondary Molybdenum and Vanadium Subcategory\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of technical grade molybdenum plus vanadium plus pure grade molybdenum produced\nArsenic 40.778 18.145\nChromium 8.585 3.512\nLead 8.195 3.902\nNickel 37.460 24.779\nIron 23.410 11.902\nMolybdenum [Reserved] [Reserved]\nAmmonia (as N) 8078.000 3551.000\nTotal Suspended Solids 799.950 380.460\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(b) Molybdenum filtrate solvent extraction raffinate.\nBPT Limitations for the Secondary Molybdenum and Vanadium Subcategory\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of technical grade molybdenum plus vanadium plus pure grade molybdenum produced\nArsenic 121.720 54.162\nChromium 25.625 10.483\nLead 24.460 11.648\nNickel 111.819 73.964\nIron 69.887 35.526\nMolybdenum [Reserved] [Reserved]\nAmmonia (as N) 24114.000 10600.000\nTotal Suspended Solids 2387.800 1135.660\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(c) Vanadium decomposition wet air pollution control.\nBPT Limitations for the Secondary Molybdenum and Vanadium Subcategory\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of vanadium produced by decomposition\nArsenic 0.000 0.000\nChromium 0.000 0.000\nLead 0.000 0.000\nNickel 0.000 0.000\nIron 0.000 0.000\nMolybdenum 0.000 0.000\nAmmonia (as N) 0.000 0.000\nTotal suspended solids 0.000 0.000\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(d) Molybdenum drying wet air pollution control.\nBPT Limitations for the Secondary Molybdenum and Vanadium Subcategory\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of molybdenum produced\nArsenic 0.000 0.000\nChromium 0.000 0.000\nLead 0.000 0.000\nNickel 0.000 0.000\nIron 0.000 0.000\nMolybdenum 0.000 0.000\nAmmonia (as N) 0.000 0.000\nTotal suspended solids 0.000 0.000\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(e) Pure Grade Molybdenum.\nBPT Limitations for the Secondary Molybdenum and Vanadium Subcategory\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of pure molybdenum produced\nArsenic 48.655 21.650\nChromium 10.243 4.190\nLead 9.778 4.656\nNickel 44.698 29.566\nIron 27.936 14.201\nMolybdenum [Reserved] [Reserved]\nAmmonia (as N) 9638.000 4237.000\nTotal Suspended Solids 954.480 453.960\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 T—Secondary Molybdenum and Vanadium 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":"781187bda9ea1231dc14301262c6d735821f80951fe5b61b277f6bfdf1d9a99a","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-421.221","next":"us/40-cfr-421.223"},"notice":"GroundRules: Original legal text. Not legal advice."}