40 C.F.R. § 421.135
Pretreatment standards for existing sources.
Cite as 40 C.F.R. § 421.135 (2026)
Except as provided in 40 CFR 403.7 and 403.13, any existing source subject to this subpart which introduces pollutants into a publicly owned treatment works must comply with 40 CFR part 403 and achieve the following pretreatment standards for existing sources. The mass of wastewater pollutants in secondary lead process wastewater introduced into a POTW shall not exceed the following values: (a) Subpart M—Battery Cracking. PSES Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of lead scrap produced Antimony 1.299 .579 Arsenic .936 .384 Lead .189 .087 Zinc .687 .283 Ammonia (as N) .000 .000 (b) Subpart M—Blast, Reverberatory, or Rotary Furnace Wet Air Pollution Control. PSES Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of lead produced from smelting Antimony 5.038 2.245 Arsenic 3.628 1.488 Lead .731 .339 Zinc 2.662 1.096 Ammonia (as N) .000 .000 (c) Subpart M—Kettle Wet Air Pollution Control. PSES Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of lead produced from refining Antimony .087 .039 Arsenic .063 .026 Lead .013 .006 Zinc .046 .019 Ammonia (as N) .000 .000 (d) Subpart M—Lead Paste Desulfurization. PSES Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of lead processed through desulfurization Antimony .000 .000 Arsenic .000 .000 Lead .000 .000 Zinc .000 .000 Ammonia (as N) .000 .000 (e) Subpart M—Casting Contact Cooling. PSES Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of lead cast Animony .042 .019 Arsenic .031 .013 Lead .006 .003 Zinc .022 .009 Ammonia (as N) .000 .000 (f) Subpart M—Truck Wash. PSES Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of lead produced from smelting Antimony .041 .018 Arsenic .029 .012 Lead .006 .003 Zinc .021 .009 Ammonia (as N) .000 .000 (g) Subpart M—Facility Washdown. PSES Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of lead produced from smelting Antimony .000 .000 Arsenic .000 .000 Lead .000 .000 Zinc .000 .000 Ammonia (as N) .000 .000 (h) Subpart M—Battery Case Classification. PSES Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of lead scrap produced Antimony .000 .000 Arsenic .000 .000 Lead .000 .000 Zinc .000 .000 Ammonia (as N) .000 .000 (i) Subpart M—Employee Handwash. PSES Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of lead produced from smelting Antimony .052 .023 Arsenic .038 .015 Lead .008 .004 Zinc .028 .011 Ammonia (as N) .000 .000 (j) Subpart M—Employee Respirator Wash. PSES Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of lead produced from smelting Antimony .085 .038 Arsenic .061 .025 Lead .012 .006 Zinc .045 .018 Ammonia (as N) .000 .000 (k) Subpart M—Laundering of Uniforms. PSES Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of lead produced from smelting Antimony .247 .110 Arsenic .178 .073 Lead .036 .017 Zinc .131 .054 Ammonia (as N) .000 .000
- Cross-references to the CFR
- 40:403.7