{"data":{"id":"us/40-cfr-421.104","jurisdiction":"us","citation":"40 CFR 421.104","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) Subpart J—Tungstic Acid Rinse.\nNSPS\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of tungstic acid (as W) produced\nLead 11.490 5.333\nZinc 41.850 17.230\nAmmonia (as N) 5,469.000 2,404.000\nTotal suspended solids 615.400 492.300\npH (1) (1)\n1 Within the range of 7.0 to 10.0 at all times.\n(b) Subpart J—Acid Leach Wet Air Pollution\nNSPS\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of tungstic acid (as W) produced\nLead 1.003 0.466\nZinc 3.653 1.504\nAmmonia (as N) 477.400 209.900\nTotal suspended solids 53.720 42.970\npH (1) (1)\n1 Within the range of 7.0 to 10.0 at all times.\n(c) Subpart J—Alkali Leach Wash.\nNSPS\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of sodium tungstate (as W) produced\nLead 0.000 0.000\nZinc 0.000 0.000\nAmmonia (as N) 0.000 0.000\nTotal suspended solids 0.000 0.000\npH (1) (1)\n1 Within the range of 7.0 to 10.0 at all times.\n(d) Subpart J—Alkali Leach Wash Condensate.\nNSPS\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of sodium tungstate (as W) produced\nLead 5.372 2.494\nZinc 19.570 8.057\nAmmonia (as N) 2,557.000 1,124.000\nTotal suspended solids 287.800 229.600\npH (1) (1)\n1 Within the range of 7.0 to 10.0 at all times.\n(e) Subpart J—Ion Exchange Raffinate (Commingled With Other Process or Nonprocess Waters).\nNSPS\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of ammonium tungstate (as W) produced\nLead 24.780 11.500\nZinc 90.240 37.160\nAmmonia (as N) 11,790.000 5,185.000\nTotal suspended solids 1,327.000 1,062.000\npH (1) (1)\n1 Within the range of 7.0 to 10.0 at all times.\n(f) Subpart J—Ion Exchange Raffinate (Not Commingled With Other Process or Nonprocess Waters).\nNSPS\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of ammonium tungstate (as W) produced\nLead 24.780 11.500\nZinc 90.240 37.160\nAmmonia (as N) (2) 11,790.000 5,185.000\nTotal suspended solids 1,327.000 1,062.000\npH (1) (1)\n1 Within the range of 7.0 to 10.0 at all times.\n2 The new source standard for this pollutant does not apply if (a) the mother liquor feed to the ion exchange process or the raffinate from the ion exchange process contains sulfates at concentrations exceeding 1000 mg/l; (b) this mother liquor or raffinate is treated by ammonia steam stripping; and (c) such mother liquor or raffinate is not commingled with any other process or nonprocess waters prior to steam stripping for ammonia removal.\n(g) Subpart J—Calcium Tungstate Precipitate Wash.\nNSPS\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of calcium tungstate (as W) produced\nLead 20.670 9.594\nZinc 75.280 31.000\nAmmonia (as N) 9,838.000 4,325.000\nTotal suspended solids 1,107.000 885.600\npH (1) (1)\n1 Within the range of 7.0 to 10.0 at all times.\n(h) Subpart J—Crystallization and Drying of Ammonium Paratungstate.\nNSPS\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of ammonium paratungstate (as W) produced\nLead 0.000 0.000\nZinc 0.000 0.000\nAmmonia (as N) 0.000 0.000\nTotal suspended solids 0.000 0.000\npH (1) (1)\n1 Within the range of 7.0 to 10.0 at all times.\n(i) Subpart J—Ammonium Paratungstate Conversion to Oxides Wet Air Pollution Control.\nNSPS\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pound per million pounds) of tungstic oxide (as W) produced\nLead 0.773 0.359\nZinc 2.817 1.160\nAmmonia (as N) 368.200 161.900\nTotal suspended solids 41.430 33.150\npH (1) (1)\n1 Within the range of 7.0 to 10.0 at all times.\n(j) Subpart J—Ammonium Paratungstate Conversion to Oxides Water of Formation.\nNSPS\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of tungstic oxide (as W) produced\nLead 0.018 0.008\nZinc 0.064 0.026\nAmmonia (as N) 8.398 3.692\nTotal suspended solids 0.945 0.756\npH (1) (1)\n1 Within the range of 7.0 to 10.0 at all times.\n(k) Subpart J—Reduction to Tungsten Wet Air Pollution Control.\nNSPS\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of tungsten metal produced\nLead .862 .400\nZinc 3.142 1.294\nAmmonia (as N) 410.600 180.500\nTotal suspended solids 46.200 36.960\npH (1) (1)\n1 Within the range of 7.0 to 10.0 at all times.\n(l) Subpart J—Reduction to Tungsten Water of Formation.\nNSPS\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of tungsten metal produced\nLead .137 .064\nZinc .499 .205\nAmmonia (as N) 65.190 28.660\nTotal suspended solids 7.335 5.868\npH (1) (1)\n1 Within the range of 7.0 to 10.0 at all times.\n(m) Subpart J—Tungsten Power Acid Leach and Wash.\nNSPS\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of tungsten metal produced\nLead .672 .312\nZinc 2.448 1.008\nAmmonia (as N) 319.900 140.700\nTotal suspended solids 36.000 28.800\npH (1) (1)\n1 Within the range of 7.0 to 10.0 at all times.\n(n) Subpart J—Molybdenum Sulfide Precipitation Wet Air Pollution Control.\nNSPS\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of tungsten metal produced\nLead .00 .000\nZinc .000 .000\nAmmonia (as N) .000 .000\nTotal suspended solids .000 .000\npH (1) (1)\n1 Within the range of 7.0 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 J—Primary Tungsten 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":"fd78e871e51f48eedcbfe962de77135064ff51c228293c5d969dbc6f0361517a","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-421.103","next":"us/40-cfr-421.105"},"notice":"GroundRules: Original legal text. Not legal advice."}