{"data":{"id":"us/40-cfr-421.74","jurisdiction":"us","citation":"40 CFR 421.74","heading":"Standards of performance for new sources.","body":"Any new source subject to this subpart must achieve the following performance standards:\n(a) Subpart G—Sinter Plant Materials Handling Wet Air Pollution Control.\nNSPS\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kkg (pounds per billion pounds) of sinter production\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(b) Subpart G—Blast Furnace Wet Air Pollution Control.\nNSPS\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kkg (pounds per billion pounds) of blast furnace lead bullion produced\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(c) Subpart G—Blast Furnace Slag Granulation.\nNSPS\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kkg (pounds per billion pounds) of blast furnance lead bullion produced\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 G—Dross Reverberatory Slag Granulation.\nNSPS\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kkg (pounds per billion pounds) of slag, speiss, or matte granulated\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(e) Subpart G—Dross Reverberatory Furnace Wet Air Pollution Control.\nNSPS\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kkg (pounds per billion pounds) of dross reverberatory furnace production\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(f) Subpart G—Zinc Fuming Wet Air Pollution Control.\nNSPS\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kkg (pounds per billion pounds) of blast furnace lead bullion produced\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(g) Subpart G—Hard Lead Refining Slag Granulation.\nNSPS\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kkg (pounds per billion pounds) of hard lead produced\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(h) Subpart G—Hard Lead Refining Wet Air Pollution Control.\nNSPS\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kkg (pounds per billion pounds) of hard lead produced\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(i) Subpart G—Facility Washdown.\nNSPS\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kkg (pounds per billion pounds) of lead bullion produced\nLead .000 .000\nZinc .000 .000\nTotal suspended solids .000 .000\npH (1) (1)\nWithin the range of 7.5 to 10.0 at all times.\n(j) Subpart G—Employee Handwash.\nNSPS\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kkg (pounds per billion pounds) of lead bullion produced\nLead .924 .429\nZinc 3.366 1.386\nTotal suspended solids 49.500 39.600\npH (1) (1)\nWithin the range of 7.5 to 10.0 at all times.\n(k) Subpart G—Respirator Wash.\nNSPS\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kkg (pounds per billion pounds) of lead bullion produced\nLead 1.484 .689\nZinc 5.406 2.226\nTotal suspended solids 79.500 63.600\npH (1) (1)\nWithin the range of 7.5 to 10.0 at all times.\n(l) Subpart G—Laundering of Uniforms.\nNSPS\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kkg (pounds per billion pounds) of lead bullion produced\nLead 4.340 2.015\nZinc 15.810 6.510\nTotal suspended solids 232.500 186.000\npH (1) (1)\nWithin 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 G—Primary Lead 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":"cf483b1d37f91ad274348ae4a931e425ef3ae1de2001efd01657c4124583ea2c","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-421.73","next":"us/40-cfr-421.75"},"notice":"GroundRules: Original legal text. Not legal advice."}