{"data":{"id":"us/40-cfr-421.216","jurisdiction":"us","citation":"40 CFR 421.216","heading":"Pretreatment standards for new sources.","body":"Except as provided in 40 CFR 403.7, any new source subject to this subpart which introduces pollutants into a publicly owned treatment works must comply with 40 CFR part 403 and achieve the following pretreatment standards for new sources. The mass of wastewater pollutants in primary molybdenum and rhenium process wastewater introduced into a POTW shall not exceed the following values:\n(a) Molybdenum sulfide leachate.\nPSNS 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\n(b) Roaster SO2 scrubber.\nPSNS 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\n(c) Molybdic oxide leachate.\nPSNS 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\n(d) Hydrogen reduction furnace scrubber.\nPSNS 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\n(e) Depleted rhenium scrubbing solution.\nPSNS 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","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":"5f98227b0a85bdd7f09ea62702986e0220ccac810c72ed31f1c5c3212e062e92","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-421.215","next":"us/40-cfr-421.217"},"notice":"GroundRules: Original legal text. Not legal advice."}