{"data":{"id":"us/40-cfr-421.142","jurisdiction":"us","citation":"40 CFR 421.142","heading":"Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.","body":"Except as provided in 40 CFR 125.30 through 125.32, any existing point source subject to this subpart shall achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available:\n(a) Sodium Antimonate Autoclave Wastewater.\nBPT Limitations for the Primary Antimony Subcategory\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of antimony contained in sodium antimonate product\nAntimony 44.840 20.000\nArsenic 32.650 14.530\nMercury 3.906 1.562\nTotal suspended solids 640.600 304.700\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(b) Fouled anolyte.\nBPT Limitations for the Primary Antimony Subcategory\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of antimony metal produced by electrowinning\nAntimony 44.840 20.000\nArsenic 32.650 14.530\nMercury 3.906 1.562\nTotal suspended solids 640.600 304.700\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(c) Cathode Antimony Wash Water.\nBPT Limitations for the Primary Antimony Subcategory\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of antimony metal produced by electrowinning\nAntimony 89.680 40.000\nArsenic 65.310 29.060\nMercury 7.812 3.125\nTotal suspended solids 1,281.000 609.300\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 N—Primary Antimony 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":"70b75488d72c1d56586409624ce6f7c291f2344a509af25b9215b231a5e6942b","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-421.141","next":"us/40-cfr-421.143"},"notice":"GroundRules: Original legal text. Not legal advice."}