{"data":{"id":"us/40-cfr-421.134","jurisdiction":"us","citation":"40 CFR 421.134","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 M—Battery Cracking.\nNSPS\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of lead scrap produced\nAntimony 1.299 .579\nArsenic .936 .384\nLead .189 .087\nZinc .687 .283\nAmmonia (as N) .000 .000\nTotal suspended solids 10.100 8.076\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.\nNSPS\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 5.038 2.245\nArsenic 3.628 1.488\nLead .731 .339\nZinc 2.662 1.096\nAmmonia (as N) 0.000 0.000\nTotal suspended solids 39.150 31.320\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.\nNSPS\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 .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(d) Subpart M—Lead Paste Desulfurization.\nNSPS\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.\nNSPS\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of lead cast\nAntimony .042 .019\nArsenic .031 .013\nLead .006 .003\nZinc .022 .009\nAmmonia (as N) .000 .000\nTotal suspended solids .330 .264\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(f) Subpart M—Truck Wash.\nNSPS\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 .041 .018\nArsenic .029 .012\nLead .006 .003\nZinc .021 .009\nAmmonia (as N) .000 .000\nTotal suspended solids .315 .252\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(g) Subpart M—Facility Washdown.\nNSPS\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.\nNSPS\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.\nNSPS\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 .052 .023\nArsenic .038 .015\nLead .008 .004\nZinc .028 .011\nAmmonia (as N) .000 .000\nTotal suspended solids .405 .324\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(j) Subpart M—Employee Respirator Wash.\nNSPS\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 .085 .038\nArsenic .061 .025\nLead .012 .006\nZinc .045 .018\nAmmonia (as N) .000 .000\nTotal suspended solids .660 .528\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(k) Subpart M—Laundering of Uniforms.\nNSPS\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 .247 .110\nArsenic .178 .073\nLead .036 .017\nZinc .131 .054\nAmmonia (as N) .000 .000\nTotal suspended solids 1.920 1.536\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":"da50620edb308131cf256b5b767bb693c1023e985025103d373d926bb180abc6","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-421.133","next":"us/40-cfr-421.135"},"notice":"GroundRules: Original legal text. Not legal advice."}