{"data":{"id":"us/40-cfr-421.323","jurisdiction":"us","citation":"40 CFR 421.323","heading":"Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.","body":"Except as provided in 40 CFR 125.30 through 125.32, any existing point source subject to this subpart shall achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable:\n(a) Refinery sump filtrate.\nBAT Limitations 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\n(b) Slag leach reslurry.\nBAT Limitations 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\n(c) Solvent extraction raffinate filtrate.\nBAT Limitations 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\n(d) Digestion wet air pollution control.\nBAT Limitations 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\n(e) Evaporation and denitration wet air pollution control.\nBAT Limitations 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\n(f) Hydrofluorination alkaline scrubber.\nBAT Limitations 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\n(g) Hydrofluorination water scrubber.\nBAT Limitations 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\n(h) Magnesium reduction and casting floor wash.\nBAT Limitations 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\n(i) Laundry wastewater.\nBAT Limitations 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","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":"830f293ff505c64dc0dd43371fddb9e16ec2dfbe08989d5f88d6442909838549","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-421.322","next":"us/40-cfr-421.324"},"notice":"GroundRules: Original legal text. Not legal advice."}