{"data":{"id":"us/40-cfr-421.72","jurisdiction":"us","citation":"40 CFR 421.72","heading":"Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.","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 practicable control technology currently available:\n(a) Subpart G—Sinter Plant Materials Handling Wet Air Pollution Control.\nBPT Effluent Limitations\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kkg (pounds per billion pounds) of sinter production\nLead 594.000 270.000\nZinc 525.000 219.600\nTotal suspended solids 14,760.000 7,020.000\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.\nBPT Effluent Limitations\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kkg (pounds per billion pounds) of blast furance 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.\nBPT Effluent Limitations\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kkg (pounds per billion pounds) of blast furance lead bullion produced\nLead 6,155.000 2,798.000\nZinc 5,446.000 2,276.000\nTotal suspended solids 153,000.000 72,740.000\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(d) Subpart G—Dross Reverberatory Slag Granulation.\nBPT Effluent Limitations\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 9,499.000 4,318.000\nZinc 8,405.000 3,512.000\nTotal suspended solids 236,000.000 112,300.000\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.\nBPT Effluent Limitations\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 15,920.000 7,235.000\nZinc 14,080.000 5,884.000\nTotal suspended solids 395,500.000 188,100.000\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.\nBPT Effluent Limitations\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kkg (pounds per billion pounds) of blast furance lead bullion produced\nLead 702.900 319.500\nZinc 622.000 259.900\nTotal suspended solids 17,470.000 8,307.000\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.\nBPT Effluent Limitations\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 Air Pollution Control.\nBPT Effluent Limitations\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kkg (pounds per billion pounds) of hard lead produced\nLead 32,730.000 14,880.000\nZinc 28,960.000 12,100.000\nTotal suspended solids 813,300.000 386,800.000\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(i) Subpart G—Facility Washdown.\nBPT Effluent Limitations\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)\n1 Within the range of 7.5 to 10.0 at all times.\n(j) Subpart G—Employee Handwash.\nBPT Effluent Limitations\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kkg (pounds per billion pounds) of lead bullion produced\nLead 5.445 2.475\nZinc 4.818 2.013\nTotal suspended solids 135.300 64.350\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(k) Subpart G—Respirator Wash.\nBPT Effluent Limitations\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kkg (pounds per billion pounds) of lead bullion produced\nLead 8.745 3.975\nZinc 7.738 3.233\nTotal suspended solids 217.300 103.400\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(l) Subpart G—Laundering of Uniforms.\nBPT Effluent Limitations\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kkg (pounds per billion pounds) of lead bullion produced\nLead 25.580 11.630\nZinc 22.630 9.455\nTotal suspended solids 635.500 302.300\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 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":"4f20f06c968afab2b6b59cbff0d95a6b2955564e04841b72514b1d186e3b9a4c","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-421.71","next":"us/40-cfr-421.73"},"notice":"GroundRules: Original legal text. Not legal advice."}