{"data":{"id":"us/40-cfr-420.104","jurisdiction":"us","citation":"40 CFR 420.104","heading":"New source performance standards (NSPS).","body":"The discharge of wastewater pollutants from any new source subject to this subpart shall not exceed the standards set forth below.\n(a) Cold rolling mills—(1) Recirculation—single stand.\nSubpart J\nPollutant or pollutant property New source performance standards\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 cotreated 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 New source performance standards\nMaximum for any 1 day Average of daily values for 30 consecutive days\nKg/kkg (pounds per 1,000 lb) of product\nTSS 0.00250 0.00125\nO\u0026G 0.00104 0.000417\nChromium 1 0.0000418 0.0000167\nLead 0.0000188 0.0000063\nNickel 1 0.0000376 0.0000125\nZinc 0.0000125 0.0000042\nNaphthalene 0.0000042\nTetrachloroethylene 0.0000063\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 New source performance standards\nMaximum for any 1 day Average of daily values for 30 consecutive days\nKg/kkg (pounds per 1,000 lb) of product\nTSS 0.0326 0.0163\nO\u0026G 0.0136 0.00543\nChromium 1 0.000543 0.000217\nLead 0.000244 0.0000814\nNickel 1 0.000488 0.000163\nZinc 0.000163 0.0000542\nNaphthalene 0.0000542\nTetrachloroethylene 0.0000813\npH (2) (2)\n1 The limitations for chromium and nickel shall be applicable in lieu of those for lead and zinc when cold rolling wastwaters are treated 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 New source performance standards\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\nTetrachloro-ethylene 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 watewaters.\n2 Within the range of 6.0 to 9.0.\n(5) Direct application—multiple stands.\nSubpart J\nPollutant or pollutant property New source performance standards\nMaximum for any 1 day Average of daily values for 30 consecutive days\nKg/kkg (pounds per 1,000 lb) of product\nTSS 0.0726 0.0363\nO\u0026G 0.0302 0.0121\nChromium 1 0.00121 0.000484\nLead 0.000545 0.000182\nNickel 1 0.00109 0.000363\nZinc 0.000363 0.000121\nNaphthalene 0.000121\nTetrachloro-ethylene 0.000182\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 watewaters.\n2 Within the range of 6.0 to 9.0.\n(b) Cold worked pipe and tube mills—(1) Using water.\nSubpart J\nPollutant or pollutant property New source performance standards\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 cotreated 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 New Source Performance Standards\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 cotreated 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":"ebe973395192ff64dfb68d10dadc68b189e3e239aade2a6dace717caa236f67a","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-420.103","next":"us/40-cfr-420.105"},"notice":"GroundRules: Original legal text. Not legal advice."}