{"data":{"id":"us/40-cfr-421.324","jurisdiction":"us","citation":"40 CFR 421.324","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) Refinery sump filtrate.\nNSPS for the Secondary Uranium Subcategory\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of uranium processed in the refinery\nChromium (total) 27.14 11.00\nCopper 93.88 44.74\nNickel 40.34 27.14\nFluoride 2,567.00 1,459.00\nTotal suspended solids 1,100.00 880.10\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(b) Slag leach reslurry.\nNSPS for the Secondary Uranium Subcategory\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of uranium processed in the refinery\nChromium (total) 1.689 0.685\nCopper 5.844 2.785\nNickel 2.511 1.689\nFluoride 159.800 90.860\nTotal suspended solids 68.490 54.790\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(c) Solvent extraction raffinate filtrate.\nNSPS for the Secondary Uranium Subcategory\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of uranium processed in the refinery\nChromium (total) 2.357 0.955\nCopper 8.152 3.885\nNickel 3.503 2.357\nFluoride 222.900 126.700\nTotal suspended solids 95.540 76.430\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(d) Digestion wet air pollution control.\nNSPS for the Secondary Uranium Subcategory\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of uranium processed in the refinery\nChromium (total) 0.000 0.000\nCopper 0.000 0.000\nNickel 0.000 0.000\nFluoride 0.000 0.000\nTotal suspended solids 0.000 0.000\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(e) Evaporation and denitration wet air pollution control\nNSPS for the Secondary Uranium Subcategory\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of uranium trioxide produced\nChromium (total) 0.000 0.000\nCopper 0.000 0.000\nNickel 0.000 0.000\nFluoride 0.000 0.000\nTotal suspended solids 0.000 0.000\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(f) Hydrofluorination alkaline scrubber.\nNSPS for the Secondary Uranium Subcategory\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of uranium tetrafluoride produced\nChromium (total) 0.007 0.003\nCopper 0.026 0.012\nNickel 0.011 0.007\nFluoride 0.700 0.398\nTotal suspended solids 0.300 0.240\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(g) Hydrofluorination water scrubber.\nNSPS for the Secondary Uranium Subcategory\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of uranium tetrafluoride produced\nChromium (total) 0.000 0.000\nCopper 0.000 0.000\nNickel 0.000 0.000\nFluoride 0.000 0.000\nTotal suspended solids 0.000 0.000\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(h) Magnesium reduction and casting floor wash.\nNSPS for the Secondary Uranium Subcategory\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of uranium produced by magnesium reduction\nChromium (total) 0.011 0.005\nCopper 0.039 0.018\nNickel 0.017 0.011\nFluoride 1.054 0.599\nTotal suspended solids 0.452 0.361\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(i) Laundry wastewater.\nNSPS for the Secondary Uranium Subcategory\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of uranium produced by magnesium reduction\nChromium (total) 0.036 0.014\nCopper 0.123 0.059\nNickel 0.053 0.036\nFluoride 3.360 1.910\nTotal suspended solids 1.440 1.152\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 AD—Secondary Uranium 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":"7dc831c767a3a7fd91693a8e8ae9630b1ac9e0301ab3877f5d6588faad6f3f4f","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-421.323","next":"us/40-cfr-421.325"},"notice":"GroundRules: Original legal text. Not legal advice."}