{"data":{"id":"us/40-cfr-421.314","jurisdiction":"us","citation":"40 CFR 421.314","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) Tungsten detergent wash and rinse.\nNSPS for the Secondary Tungsten and Cobalt Subcategory\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of tungsten scrap washed\nCopper 0.250 0.119\nNickel 0.107 0.072\nAmmonia (as N) 25.990 11.430\nCobalt 0.538 0.236\nTungsten 0.679 0.302\nOil and grease 1.950 1.950\nTotal suspended solids 2.925 2.340\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(b) Tungsten leaching acid.\nNSPS for the Secondary Tungsten and Cobalt Subcategory\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of tungsten produced\nCopper 3.291 1.569\nNickel 1.414 0.951\nAmmonia (as N) 342.700 150.700\nCobalt 7.096 3.111\nTungsten 8.947 3.985\nOil and grease 25.710 25.710\nTotal suspended solids 38.570 30.850\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(c) Tungsten post-leaching wash and rinse.\nNSPS for the Secondary Tungsten and Cobalt Subcategory\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of tungsten produced\nCopper 6.583 3.137\nNickel 2.829 1.903\nAmmonia (as N) 685.600 301.400\nTungsten 17.900 7.972\nCobalt 14.194 6.223\nOil and grease 51.430 51.430\nTotal suspended solids 77.150 61.720\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(d) Synthetic scheelite filtrate.\nNSPS for the Secondary Tungsten and Cobalt Subcategory\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of synthetic scheelite produced\nCopper 21.330 10.170\nNickel 9.164 6.165\nAmmonia (as N) 2,221.000 976.300\nCobalt 45.984 20.160\nTungsten 57.980 25.820\nOil and grease 166.600 166.600\nTotal suspended solids 249.900 199.900\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(e) Tungsten carbide leaching wet air pollution control.\nNSPS for the Secondary Tungsten and Cobalt Subcategory\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of tungsten carbide scrap leached\nCopper 2.241 1.068\nNickel 0.963 0.648\nAmmonia (as N) 233.400 102.600\nCobalt 4.833 2.119\nTungsten 6.093 2.714\nOil and grease 17.510 17.510\nTotal suspended solids 26.270 21.010\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(f) Tungsten carbide wash water.\nNSPS for the Secondary Tungsten and Cobalt Subcategory\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of tungsten carbide produced\nCopper 10.670 5.083\nNickel 4.583 3.083\nAmmonia (as N) 1,111.000 488.300\nCobalt 22.999 10.083\nTungsten 29.000 12.920\nOil and grease 83.330 83.330\nTotal suspended solids 125.000 100.000\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(g) Cobalt sludge leaching wet air pollution control.\nNSPS for the Secondary Tungsten and Cobalt Subcategory\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of cobalt produced from cobalt sludge\nCopper 45.80 21.83\nNickel 19.68 13.24\nAmmonia (as N) 4,770.00 2,097.00\nCobalt 98.756 43.295\nTungsten 124.50 55.46\nOil and grease 357.80 357.80\nTotal suspended solids 536.70 429.40\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(h) Crystallization decant.\nNSPS for the Secondary Tungsten and Cobalt Subcategory\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of cobalt produced\nCopper 53.310 25.410\nNickel 22.910 15.410\nAmmonia (as N) 5,552.000 2,441.000\nCobalt 114.954 50.397\nTungsten 144.900 64.560\nOil and grease 416.500 416.500\nTotal suspended solids 624.800 499.800\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(i) Acid wash decant.\nNSPS for the Secondary Tungsten and Cobalt Subcategory\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of cobalt produced\nCopper 24.400 11.630\nNickel 10.490 7.053\nAmmonia (as N) 2,541.000 1,117.000\nCobalt 52.611 23.065\nTungsten 66.340 29.550\nOil and grease 190.600 190.600\nTotal suspended solids 285.900 228.700\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(j) Cobalt hydroxide filtrate.\nNSPS for the Secondary Tungsten and Cobalt Subcategory\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of cobalt produced\nCopper 72.510 34.560\nNickel 31.160 20.960\nAmmonia (as N) 7,551.000 3,320.000\nCobalt 156.346 68.543\nTungsten 197.100 87.800\nOil and grease 566.500 566.500\nTotal suspended solids 849.700 679.800\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(k) Cobalt hydroxide filter cake wash.\nNSPS for the Secondary Tungsten and Cobalt Subcategory\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of cobalt produced\nCopper 139.600 66.510\nNickel 59.970 40.340\nAmmonia (as N) 14,530.000 6,389.000\nCobalt 300.094 131.932\nTungsten 379.400 169.000\nOil and grease 1,090.000 1,090.000\nTotal suspended solids 1,636,000 1,308.000\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 AC—Secondary Tungsten and Cobalt 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":"bb747cc4b9de81841595ade3d812f6a03c13cb77d54418b213b24001679ea611","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-421.313","next":"us/40-cfr-421.315"},"notice":"GroundRules: Original legal text. Not legal advice."}