{"data":{"id":"us/40-cfr-415.644","jurisdiction":"us","citation":"40 CFR 415.644","heading":"Pretreatment standards for existing sources (PSES).","body":"(a) Except as provided in 40 CFR 403.7 and 403.13, any existing source subject to this subpart and producing cadmium pigments 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 (PSES):\nSubpart BL—Cadmium Pigments\nPollutant or pollutant property PSES effluent limitations\nMaximum for any 1 day Average of daily values for 30 consecutive days\nMilligrams per liter (mg/l)\nCadmium (T) 0.84 0.28\nSelenium (T) 1.1 0.40\nZinc (T) 0.18 0.10\nIn cases where POTWs find it necessary to impose mass limitations, the following equivalent mass limitations are provided as an alternate: The limitations for cadmium (T), selenium (T), and zinc (T) are the same as specified in § 415.642(a).\n(b) Except as provided in 40 CFR 403.7 and 403.13, any existing source subject to this subpart and producing cadmium salts 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 (PSES):\nSubpart BL—Cadmium Salts\nPollutant or pollutant property PSES effluent limitations\nMaximum for any 1 day Average of daily values for 30 consecutive days\nMilligrams per liter (mg/l)\nCadmium (T) 0.84 0.28\nSelenium (T) 1.1 0.40\nZinc (T) 0.18 0.10\nIn cases where POTWs find it necessary to impose mass limitations, the following equivalent mass limitations are provided as an alternate: The limitations for cadmium (T), selenium (T), and zinc (T) are the same as specified in § 415.642(b).","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER N—EFFLUENT GUIDELINES AND STANDARDS","PART 415—INORGANIC CHEMICALS MANUFACTURING POINT SOURCE CATEGORY","Subpart BL—Cadmium Pigments and Salts Production 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":"ee544b06dcbb33d28a36d072f2bb48a29a3ebd4b1c566460605a06569a6aa963","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-415.643","next":"us/40-cfr-415.645"},"notice":"GroundRules: Original legal text. Not legal advice."}