{"data":{"id":"us/40-cfr-421.132","jurisdiction":"us","citation":"40 CFR 421.132","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 technology currently available:\n(a) Subpart M—Battery Cracking\nBPT Effluent Limitations\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of lead scrap produced\nAntimony 1.932 .862\nArsenic 1.407 .579\nLead .283 .135\nZinc .983 .411\nAmmonia (as N) .000 .000\nTotal suspended solids 27.600 13.130\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(b) Subpart M—Blast, Reverberatory, or Rotary Furnace Wet Air Pollution Control\nBPT Effluent Limitations\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of lead produced from smelting\nAntimony 7.491 3.341\nArsenic 5.455 2.245\nLead 1.096 .522\nZinc 3.811 1.592\nAmmonia (as N) .000 .000\nTotal suspended solids 107.000 50.900\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(c) Subpart M—Kettle Wet Air Pollution Control\nBPT Effluent Limitations\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of lead produced from refining\nAntimony .129 .058\nArsenic .094 .039\nLead .019 .009\nZinc .066 .027\nAmmonia (as N) .000 .000\nTotal suspended solids 1.845 .878\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(d) Subpart M—Lead Paste Desulfurization\nBPT Effluent Limitations\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of lead processed through desulfurization\nAntimony .000 .000\nArsenic .000 .000\nLead .000 .000\nZinc .000 .000\nAmmonia (as N) .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 M—Casting Contact Cooling\nBPT Effluent Limitations\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of lead cast\nAntimony .634 .283\nArsenic .462 .190\nLead .093 .044\nZinc .323 .135\nAmmonia (as N) .000 .000\nTotal suspended solids 9.061 4.310\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(f) Subpart M—Truck Wash.\nBPT Effluent Limitations\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of lead produced from smelting\nAntimony .060 .027\nArsenic .044 .018\nLead .009 .004\nZinc .031 .013\nAmmonia (as N) .000 .000\nTotal suspended solids .861 .410\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(g) Subpart M—Facility Washdown\nBPT Effluent Limitations\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of lead produced from smelting\nAntimony .000 .000\nArsenic .000 .000\nLead .000 .000\nZinc .000 .000\nAmmonia (as N) .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 M—Battery Case Classification.\nBPT Effluent Limitations\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of lead scrap produced\nAntimony .000 .000\nArsenic .000 .000\nLead .000 .000\nZinc .000 .000\nAmmonia (as N) .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 M—Employee Handwash.\nBPT Effluent Limitations\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of lead produced from smelting\nAntimony .077 .035\nArsenic .056 .023\nLead .011 .005\nZinc .039 .016\nAmmonia (as N) .000 .000\nTotal suspended solids 1.107 .527\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(j) Subpart M—Employee Respirator Wash.\nBPT Effulent Limitations\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of lead produced from smelting\nAntimony .126 .056\nArsenic .092 .038\nLead .018 .009\nZinc .064 .027\nAmmonia (as N) .000 .000\nTotal suspended solids 1.804 .858\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(k) Subpart M—Laundering of Uniforms.\nBPT Effluent Limitations\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of lead produced from smelting\nAntimony .367 .164\nArsenic .268 .110\nLead .054 .026\nZinc .187 .078\nAmmonia (as N) .000 .000\nTotal suspended solids 5.248 2.496\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 M—Secondary 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":"a8e44b7c3f8daa7c5481beea0103ce38674d7c5a095236895325989efa9c26bf","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-421.131","next":"us/40-cfr-421.133"},"notice":"GroundRules: Original legal text. Not legal advice."}