{"data":{"id":"us/40-cfr-420.84","jurisdiction":"us","citation":"40 CFR 420.84","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) Salt bath descaling, oxidizing—(1) Batch, sheet and plate.\nSubpart H\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 0.204 0.0876\nChromium 0.00292 0.00117\nNickel 0.00263 0.000876\npH (1) (1)\n1 Within the range of 6.0 to 9.0.\n(2) Batch, rod and wire.\nSubpart H\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 0.123 0.0526\nChromium 0.00175 0.000701\nNickel 0.00158 0.000526\npH (1) (1)\n1 Within the range of 6.0 to 9.0.\n(3) Batch, pipe and tube.\nSubpart H\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 0.496 0.213\nChromium 0.00709 0.00284\nNickel 0.00638 0.00213\npH (1) (1)\n1 Within the range of 6.0 to 9.0.\n(4) Continuous.\nSubpart H\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 0.0964 0.0413\nChromium 0.00138 0.000551\nNickel 0.00124 0.000413\npH (1) (1)\n1 Within the range of 6.0 to 9.0.\n(b) Salt bath descaling, reducing—(1) Batch.\nSubpart H\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 0.0949 0.0407\nCyanide 0.00102 0.000339\nChromium 0.00136 0.000542\nNickel 0.00122 0.000407\npH (1) (1)\n1 Within the range of 6.0 to 9.0.\n(2) Continuous.\nSubpart H\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 0.532 0.228\nCyanide 0.00569 0.00190\nChromium 0.00759 0.00304\nNickel 0.00683 0.00228\npH (1) (1)\n1 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 H—Salt Bath Descaling 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":"7b3e7723fbb9f9917ab8b5010de624d25ca940958afe1bcf3f34e16919e11df1","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-420.83","next":"us/40-cfr-420.85"},"notice":"GroundRules: Original legal text. Not legal advice."}