{"data":{"id":"us/40-cfr-420.102","jurisdiction":"us","citation":"40 CFR 420.102","heading":"Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT).","body":"Except as provided in 40 CFR 125.30 through 125.32, any existing point source subject to this subpart must 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) Cold rolling mills—(1) Recirculation—single stand.\nSubpart J\nPollutant or pollutant property BPT effluent limitations\nMaximum for any 1 day Average of daily values for 30 consecutive days\nKg/kkg (pounds per 1,000 lb) of product\nTSS 0.00125 0.000626\nO\u0026G 0.000522 0.000209\nChromium 1 0.0000209 0.0000084\nLead 0.0000094 0.0000031\nNickel 1 0.0000188 0.0000063\nZinc 0.0000063 0.0000021\nNaphthalene 0.0000021\nTetrachloroethylene 0.0000031\npH (2) (2)\n1 The limitations for chromium and nickel shall be applicable in lieu of those for lead and zinc when cold rolling wastewaters are treated with descaling or combination acid pickling wastewaters.\n2 Within the range of 6.0 to 9.0.\n(2) Recirculation—multiple stands.\nSubpart J\nPollutant or pollutant property BPT effluent limitations\nMaximum for any 1 day Average of daily values for 30 consecutive days\nKg/kkg (pounds per 1,000 lb) of product\nTSS 0.00626 0.00313\nO\u0026G 0.00261 0.00104\nChromium 1 0.000104 0.0000418\nLead 0.0000469 0.0000156\nNickel 1 0.0000939 0.0000313\nZinc 0.0000313 0.0000104\nNaphthalene 0.0000104\nTetrachloroethylene 0.0000156\npH (2) (2)\n1 The limitations for chromium and nickel shall be applicable in lieu of those for lead and zinc when cold rolling wastewaters are treated with descaling or combination acid pickling wastewaters.\n2 Within the range of 6.0 to 9.0.\n(3) Combination.\nSubpart J\nPollutant or pollutant property BPT effluent limitations\nMaximum for any 1 day Average of daily values for 30 consecutive days\nKg/kkg (pounds per 1,000 lb) of product\nTSS 0.0751 0.0376\nO\u0026G 0.0313 0.0125\nChromium 1 0.00125 0.000501\nLead 0.000563 0.000188\nNickel 1 0.00113 0.000376\nZinc 0.000376 0.000125\nNaphthalene 0.000125\nTetrachloroethylene 0.000188\npH (2) (2)\n1 The limitations for chromium and nickel shall be applicable in lieu of those for lead and zinc when cold rolling wastewaters are cotreated with descaling or combination acid pickling wastewaters.\n2 Within the range of 6.0 to 9.0.\n(4) Direct application—single stand.\nSubpart J\nPollutant or pollutant property BPT effluent limitations\nMaximum for any 1 day Average of daily values for 30 consecutive days\nKg/kkg (pounds per 1,000 lb) of product\nTSS 0.0225 0.0113\nO\u0026G 0.00939 0.00376\nChromium 1 0.000376 0.000150\nLead 0.000169 0.0000563\nNickel 1 0.000338 0.000113\nZinc 0.000113 0.0000376\nNaphthalene 0.0000376\nTetrachloroethylene 0.0000563\npH (2) (2)\n1 The limitations for chromium and nickel shall be applicable in lieu of those for lead and zinc when cold rolling wastewaters are treated with descaling or combination acid pickling wastewaters.\n2 Within the range of 6.0 to 9.0.\n(5) Direct application—multiple stands.\nSubpart J\nPollutant or pollutant property BPT effluent limitations\nMaximum for any 1 day Average of daily values for 30 consecutive days\nKg/kkg (pounds per 1,000 lb) of product\nTSS 0.100 0.0501\nO\u0026G 0.0417 0.0167\nChromium 1 0.00167 0.000668\nLead 0.000751 0.000250\nNickel 1 0.00150 0.000501\nZinc 0.000501 0.000167\nNaphthalene 0.000167\nTetrachloroethylene 0.000250\npH (2) (2)\n1 The limitations for chromium and nickel shall be applicable in lieu of those for lead and zinc when cold rolling wastewaters are treated with descaling or combination acid pickling wastewaters.\n2 Within the range of 6.0 to 9.0.\n(b) Cold worked pipe and tube—(1) Using water.\nSubpart J\nPollutant of pollutant property BPT effluent limitations\nMaximum for any 1 day Average of daily values for 30 consecutive days\nKg/kkg (pounds per 1,000 lb) of product\nTSS 0.00125 0.000626\nO\u0026G 0.000522 0.000209\nChromium 1 0.0000209 0.0000084\nLead 0.0000094 0.0000031\nNickel 1 0.0000188 0.0000063\nZinc 0.0000063 0.0000021\npH (2) (2)\n1 The limitations for chromium and nickel shall be applicable in lieu of those for lead and zinc when cold forming wastewaters are treated with descaling or combination acid pickling wastewaters.\n2 Within the range of 6.0 to 9.0.\n(2) Using oil solutions.\nSubpart J\nPollutant or pollutant property BPT effluent limitations\nMaximum for any 1 day Average of daily values for 30 consecutive days\nKg/kkg (pounds per 1,000 lb) of product\nTSS 0.00125 0.000626\nO\u0026G 0.000522 0.000209\nChromium 1 0.0000209 0.0000084\nLead 0.0000094 0.0000031\nNickel 1 0.0000188 0.0000063\nZinc 0.0000063 0.0000021\nNaphthalene 0.0000021\nTetrachloroethylene 0.0000031\npH (2) (2)\n1 The limitations for chromium and nickel shall be applicable in lieu of those for lead and zinc when cold forming wastewaters are treated with descaling or combination acid pickling wastewaters.\n2 Within the range of 6.0 to 9.0.","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 J—Cold Forming 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":"389013b5e5af48e05dc59c93ac030340e34c40301cf3d98367a6e91015824732","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-420.101","next":"us/40-cfr-420.103"},"notice":"GroundRules: Original legal text. Not legal advice."}