{"data":{"id":"us/40-cfr-421.94","jurisdiction":"us","citation":"40 CFR 421.94","heading":"Standards of performance for new sources.","body":"Any new source subject to this subpart shall achieve the following new source performance standards:\nSubpart I—Metallurgical Acid Plant—NSPS\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per/million pounds) of 100 pct sulfuric acid capacity\nArsenic 3.550 1.584\nCadmium 0.511 0.204\nCopper 3.269 1.558\nLead 0.715 0.332\nZinc 2.605 1.073\nFluoride 1 89.390 50.820\nMolybdenum 1 [Reserved] [Reserved].\nTotal suspended solids 38.310 30.650\npH (2) (2)\n1 For Molybdenum acid plants only.\n2 Within the range of 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 421—NONFERROUS METALS MANUFACTURING POINT SOURCE CATEGORY","Subpart I—Metallurgical Acid Plants 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":"1cc6329cdf2d8e8f667b51fc345155a7dacf1ad6a3f67fc721a0463573fc213f","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-421.93","next":"us/40-cfr-421.95"},"notice":"GroundRules: Original legal text. Not legal advice."}