{"data":{"id":"us/40-cfr-421.84","jurisdiction":"us","citation":"40 CFR 421.84","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 H—Zinc Reduction Furnace 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 zinc reduced\nCadmium .334 .134\nCopper 2.135 1.018\nLead .467 .217\nZinc 1.702 .701\nTotal suspended solids 25.020 20.020\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(b) Subpart H—Preleach of Zinc Concentrates.\nNSPS\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of concentrate leached\nCadmium .180 .072\nCopper 1.153 .550\nLead .252 .117\nZinc .919 .378\nTotal suspended solids 13.520 10.810\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(c) Subpart H—Leaching 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 zinc processed through leaching\nCadmium .000 .000\nCopper .000 .000\nLead .000 .000\nZinc .000 .000\nTotal suspended solids .000 .000\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(d) Subpart H—Electrolyte Bleed Wastewater.\nNSPS\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of cathode zinc produced\nCadmium .086 .035\nCopper .553 .264\nLead .121 .056\nZinc .441 .182\nTotal suspended solids 6.480 5.184\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(e) Subpart H—Cathode and Anode Wash Wastewater.\nNSPS\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of cathode zinc produced\nCadmium .150 .060\nCopper .961 .458\nLead .210 .098\nZinc .766 .315\nTotal suspended solids 11.270 9.012\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(f) Subpart H—Casting 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 zinc cast\nCadmium .051 .021\nCopper .329 .157\nLead .072 .033\nZinc .262 .108\nTotal suspended solids 3.855 3.084\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(g) Subpart H—Casting Contact Cooling.\nNSPS\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of zinc cast\nCadmium .036 .014\nCopper .232 .110\nLead .051 .024\nZinc .185 .076\nTotal suspended solids 2.715 2.172\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(h) Subpart H—Cadmium Plant Wastewater.\nNSPS\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of cadmium produced\nCadmium 1.234 .494\nCopper 7.899 3.765\nLead 1.728 .802\nZinc 6.295 2.592\nTotal suspended solids 92.570 74.050\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 H—Primary Zinc 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":"4b230d8430fed4af8b500927c5dc3efe24b000957ff33d7260ee768f47d1021b","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-421.83","next":"us/40-cfr-421.85"},"notice":"GroundRules: Original legal text. Not legal advice."}