{"data":{"id":"us/40-cfr-421.54","jurisdiction":"us","citation":"40 CFR 421.54","heading":"Standards of performance for new sources.","body":"Any new source subject to this subpart shall achieve the following new source performance standards:\n(a) Subpart E—Casting Contact Cooling.\nNSPS\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of copper cast\nArsenic .692 .309\nCopper .638 .304\nNickel .274 .184\nTotal suspended solids 7.470 5.976\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(b) Subpart E—Anode and Cathode Rinse.\nNSPS\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of cathode copper production\nArsenic .000 .000\nCopper .000 .000\nNickel .000 .000\nTotal suspended solids .000 .000\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(c) Subpart E—Spent Electrolyte.\nNSPS\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of copper cathode production\nArsenic .068 .031\nCopper .063 .030\nNickel .027 .018\nTotal suspended solids .735 .588\npH (1) (1)\n1 Within the range 7.5 to 10.0 at all times.\n(d) Subpart E—Casting Wet Air Pollution Control.\nNSPS\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of casting production\nArsenic .000 .000\nCopper .000 .000\nNickel .000 .000\nTotal suspended solids .000 .000\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(e) Subpart E—By-Product Recovery.\nNSPS\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of product recovered from electrolytic slimes processing\nArsenic .000 .000\nCopper .000 .000\nNickel .000 .000\nTotal suspended solids .000 .000\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 E—Primary Electrolytic Copper Refining 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":"6ae14992dc3a58e2285f372e7102af0c3bb56a0ff60f43de84bdad33a46cf38c","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-421.53","next":"us/40-cfr-421.55"},"notice":"GroundRules: Original legal text. Not legal advice."}