{"data":{"id":"us/40-cfr-466.23","jurisdiction":"us","citation":"40 CFR 466.23","heading":"New source performance standards.","body":"Any new source subject to this subpart must achieve the following new source performance standards.\n(a) There shall be no discharge of process wastewater pollutants from metal preparation operations.\n(b) The discharge of process wastewater pollutants from all porcelain enameling coating operations shall not exceed the values set forth below:\nSubpart B—NSPS\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nMg/m2 (pounds per million ft2) of area coated\nChromium 0.47 (0.10) 0.19 (0.04)\nLead 0.13 (0.03) 0.11 (0.02)\nNickel 0.69 (0.14) 0.47 (0.10)\nZinc 1.29 (0.27) 0.53 (0.11)\nAluminum 3.82 (0.78) 1.56 (0.32)\nIron 1.55 (0.32) 0.79 (0.16)\nOil and grease 12.60 (2.58) 12.60 (2.58)\nTSS 18.91 (3.87) 15.12 (3.10)\npH (1) (1) (1) (1)\n1 Within the range 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 466—PORCELAIN ENAMELING POINT SOURCE CATEGORY","Subpart B—Cast Iron Basis Material 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":"87a7bcd1983f66c6330956fee4c3da16e2b635c2af41978f6c24b50703dbfb34","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-466.22","next":"us/40-cfr-466.24"},"notice":"GroundRules: Original legal text. Not legal advice."}