{"data":{"id":"us/40-cfr-421.284","jurisdiction":"us","citation":"40 CFR 421.284","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) Tantalum alloy leach and rinse.\nNSPS 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\nTotal suspended solids 3,459.000 2,767.000\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(b) Capacitor leach and rinse.\nNSPS 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\nTotal suspended solids 303.000 242.400\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(c) Tantalum sludge leach and rinse.\nNSPS 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\nTotal suspended solids 3,080.000 2,464.000\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(d) Tantalum powder acid wash and rinse.\nNSPS 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\nTotal suspended solids 5.250 4.200\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(e) Leaching wet air pollution control.\nNSPS 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\nTotal suspended solids 73.200 58.560\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 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":"d332f0d92366aad58a145197763d9260d013bcb7e7e9eda2f43cc7b1da01f18e","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-421.283","next":"us/40-cfr-421.285"},"notice":"GroundRules: Original legal text. Not legal advice."}