{"data":{"id":"us/40-cfr-420.125","jurisdiction":"us","citation":"40 CFR 420.125","heading":"Pretreatment standards for existing sources (PSES).","body":"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.\n(a) Galvanizing, terne coating and other coatings—(1) Strip, sheet, and miscellaneous products.\nSubpart L\nPretreatment standards for existing sources Pollutant or pollutant property\nMaximum for any 1 day Average of daily values for 30 consecutive days\nKg/kkg (pounds per 1,000 lb) of product\nLead 0.00113 0.000376\nZinc 0.00150 0.000500\nChromium (hexavalent) 1 0.000150 0.0000501\n1 The limitations for hexavalent chromium shall be applicable only to galvanizing operations which discharge wastewaters from the chromate rinse step.\n(2) [Reserved]\n(b) Galvanizing and other coatings—(1) Wire products and fasteners.\nSubpart L\nPollutant or pollutant property Pretreatment standards for existing sources\nMaximum for any 1 day Average of daily values for 30 consecutive days\nkg/kkg (pounds per 1,000 lb) of product\nLead 0.00451 0.00150\nZinc 0.00601 0.00200\nChromium (hexavalent) 1 0.000601 0.000200\n1 The limitations for hexavalent chromium shall be applicable only to galvanizing operations which discharge wastewaters from the chromate rinse step.\n(2) [Reserved]\n(c) Fume scrubbers.\nSubpart L\nPollutant or pollutant property Pretreatment standards for existing sources\nMaximum for any 1 day Average of daily values for 30 consecutive days\nKg per day\nLead 0.0368 0.0123\nZinc 0.0491 0.0164\nChromium (hexavalent) 1 0.00490 0.00163\n1 The limitations for hexavalent chromium shall be applicable only to galvanizing operations which discharge wastewaters from the chromate rinse step.\nThe above limitations shall be applicable to each fume scrubber associated with any of the coating operations specified above.","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER N—EFFLUENT GUIDELINES AND STANDARDS","PART 420—IRON AND STEEL MANUFACTURING POINT SOURCE CATEGORY","Subpart L—Hot Coating 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":"b1dff4a5dab5152550ece27326cef5b6fc3ee59b9aee8550cff8d95149f78e39","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-420.124","next":"us/40-cfr-420.126"},"notice":"GroundRules: Original legal text. Not legal advice."}