{"data":{"id":"us/40-cfr-421.214","jurisdiction":"us","citation":"40 CFR 421.214","heading":"Standards of performance for new sources.","body":"Any new source subject to this subpart shall achieve the following new source performance standards:\n(a) Molybdenum sulfide leachate.\nNSPS 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 leached\nArsenic 0.644 0.287\nLead 0.130 0.060\nNickel 0.255 0.171\nSelenium 0.380 0.171\nMolybdenum [Reserved] [Reserved].\nAmmonia (as N) 61.720 27.130\nFluoride 16.210 9.214\nTotal suspended solids 6.945 5.556\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(b) Roaster SO2 scrubber.\nNSPS 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 2.334 1.041\nLead 0.470 0.218\nNickel 0.924 0.621\nSelenium 1.377 0.621\nMolybdenum [Reserved] [Reserved].\nAmmonia (as N) 223.800 98.390\nFluoride 58.770 33.410\nTotal suspended solids 25.190 20.150\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(c) Molybdic oxide leachate.\nNSPS 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 16.100 7.182\nLead 3.244 1.506\nNickel 6.371 4.286\nSelenium 9.499 4.286\nMolybdenum [Reserved] [Reserved].\nAmmonia (as N) 1,544.000 678.800\nFluoride 405.400 230.500\nTotal suspended solids 173.800 139.000\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(d) Hydrogen reduction furnace scrubber.\nNSPS 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 3.183 1.420\nLead 0.641 0.298\nNickel 1.260 0.847\nSelenium 1.878 0.847\nMolybdenum [Reserved] [Reserved].\nAmmonia (as N) 305.300 134.200\nFluoride 80.150 45.570\nTotal suspended solids 34.350 27.480\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(e) Depleted rhenium scrubbing solution.\nNSPS 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 0.995 0.444\nLead 0.201 0.093\nNickel 0.394 0.265\nSelenium 0.587 0.265\nMolybdenum [Reserved] [Reserved].\nAmmonia (as N) 95.440 41.960\nFluoride 25.060 14.250\nTotal suspended solids 10.740 8.592\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":"10f33340d580c81bd5f0c263f9ec8d860b140339d8c3ec55cc18b07423275c89","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-421.213","next":"us/40-cfr-421.215"},"notice":"GroundRules: Original legal text. Not legal advice."}