{"data":{"id":"us/40-cfr-421.223","jurisdiction":"us","citation":"40 CFR 421.223","heading":"Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.","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 available technology economically achievable:\n(a) Leach Tailings.\nBAT 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 27.120 12.097\nChromium 7.219 2.927\nLead 5.463 2.536\nNickel 10.731 7.219\nIron 23.413 11.902\nMolybdenum [Reserved] [Reserved]\nAmmonia (as N) 8078.000 3551.000\n(b) Molybdenum filtrate solvent extraction raffinate.\nBAT 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 80.952 36.108\nChronium 21.548 8.736\nLead 16.306 7.571\nNickel 32.031 21.548\nIron 69.887 35.526\nMolybdenum [Reserved] [Reserved]\nAmmonia (as N) 24114.000 10600.000\n(c) Vanadium decomposition wet air pollution control.\nBAT 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\n(d) Molybdenum drying wet air pollution control.\nBAT 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\n(e) Pure Grade Molybdenum.\nBAT 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 32.359 14.434\nChromium 8.614 3.492\nLead 6.518 3.026\nNickel 12.804 8.614\nIron 27.936 14.201\nMolybdenum [Reserved] [Reserved]\nAmmonia (as N) 9638.000 4237.000","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":"fe96e5cc31b8c0ea8e1c1ffaacf0b84b32a310e390edba025512abbfd3292c6b","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-421.222","next":"us/40-cfr-421.224"},"notice":"GroundRules: Original legal text. Not legal advice."}