{"data":{"id":"us/40-cfr-420.85","jurisdiction":"us","citation":"40 CFR 420.85","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) Salt bath descaling, oxidizing—(1) Batch, sheet and plate.\nSubpart H\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\nChromium 0.00292 0.00117\nNickel 0.00263 0.000876\n(2) Batch, rod and wire.\nSubpart H\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\nChromium 0.00175 0.000701\nNickel 0.00158 0.000526\n(3) Batch, pipe and tube.\nSubpart H\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\nChromium 0.00709 0.00284\nNickel 0.00638 0.00213\n(4) Continuous.\nSubpart H\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\nChromium 0.00138 0.000551\nNickel 0.00124 0.000413\n(b) Salt bath descaling, reducing—(1) Batch.\nSubpart H\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\nCyanide 0.00102 0.000339\nChromium 0.00136 0.000542\nNickel 0.00122 0.000407\n(2) Continuous.\nSubpart H\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)\nCyanide 0.00569 0.00190\nChromium 0.00759 0.00304\nNickel 0.00683 0.00228","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 H—Salt Bath Descaling 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":"9a7b1ab0ae75efa643e9be65e03a190fd3ad496dbae57903d5f30ad0fc25721a","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-420.84","next":"us/40-cfr-420.86"},"notice":"GroundRules: Original legal text. Not legal advice."}