{"data":{"id":"us/40-cfr-421.286","jurisdiction":"us","citation":"40 CFR 421.286","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 secondary tantalum process wastewater introduced into a POTW shall not exceed the following values:\n(a) Tantalum alloy leach and rinse.\nPSNS for the Secondary Tantalum Subcategory\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of tantalum powder produced\nCopper 295.200 140.700\nLead 64.570 29.980\nNickel 126.800 85.320\nZinc 235.200 96.850\nTantalum 103.800\n(b) Capacitor leach and rinse.\nPSNS for the Secondary Tantalum Subcategory\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of tantalum powder produced from leaching\nCopper 25.860 12.320\nLead 5.656 2.626\nNickel 11.110 7.474\nZinc 20.600 8.484\nTantalum 9.090\n(c) Tantalum sludge leach and rinse.\nPSNS for the Secondary Tantalum Subcategory\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of equivalent pure tantalum powder produced\nCopper 262.800 125.200\nLead 57.480 26.690\nNickel 112.900 75.960\nZinc 209.400 86.230\nTantalum 92.390\n(d) Tantalum powder acid wash and rinse.\nPSNS for the Secondary Tantalum Subcategory\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of tantalum powder produced\nCopper 0.448 0.214\nLead 0.098 0.046\nNickel 0.193 0.130\nZinc 0.357 0.147\nTantalum 0.158\n(e) Leaching wet air pollution control.\nPSNS for the Secondary Tantalum Subcategory\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of equivalent pure tantalum powder produced\nCopper 6.246 2.977\nLead 1.366 0.634\nNickel 2.684 1.806\nZinc 4.978 2.050\nTantalum 2.196","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 Z—Secondary Tantalum 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":"c02865cd18bfe60f4f4e95232cf6aafb35aa4944ea7205b40d0c9ec41467e6b4","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-421.285","next":"us/40-cfr-421.287"},"notice":"GroundRules: Original legal text. Not legal advice."}