{"data":{"id":"us/40-cfr-421.233","jurisdiction":"us","citation":"40 CFR 421.233","heading":"Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.","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 available technology economically achievable:\n(a) Raw material dust control.\nBAT Limitations for the Primary Nickel and Cobalt Subcategory\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of copper, nickel, and cobalt in the crushed raw material\nCopper 0.099 0.047\nNickel 0.042 0.028\nAmmonia (as N) 10.260 4.512\nCobalt 0.011 0.005\n(b) Nickel wash water.\nBAT Limitations for the Primary Nickel and Cobalt Subcategory\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of nickel powder washed\nCopper 0.043 0.021\nNickel 0.019 0.013\nAmmonia (as N) 4.515 1.985\nCobalt 0.005 0.002\n(c) Nickel reduction decant.\nBAT Limitations for the Primary Nickel and Cobalt Subcategory\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of nickel produced\nCopper 16.250 7.744\nNickel 6.982 4.697\nAmmonia (as N) 1,692.000 743.900\nCobalt 1.777 0.889\n(d) Cobalt reduction decant.\nBAT Limitations for the Primary Nickel and Cobalt Subcategory\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of cobalt produced\nCopper 27.390 13.050\nNickel 11.770 7.917\nAmmonia (as N) 2,852.000 1,254.000\nCobalt 2.996 1.498","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 U—Primary Nickel and Cobalt 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":"02020ae094579f7dbe17ae2cd5a71e95a9a90f2c1870963209e972769644f453","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-421.232","next":"us/40-cfr-421.234"},"notice":"GroundRules: Original legal text. Not legal advice."}