{"data":{"id":"us/40-cfr-421.244","jurisdiction":"us","citation":"40 CFR 421.244","heading":"Standards of performance for new sources.","body":"Any new source subject to this subpart shall achieve the following new source performance standards:\n(a) Slag reclaim tailings.\nNSPS for the Secondary Nickel Subcategory\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of slag input to reclaim process\nChromium (total) 5.653 2.313\nCopper 24.410 12.850\nNickel 24.670 16.320\nTotal suspended solids 526.800 250.500\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(b) Acid reclaim leaching filtrate.\nNSPS for the Secondary Nickel Subcategory\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of acid reclaim nickel produced\nChromium (total) 2.198 0.899\nCopper 9.491 4.995\nNickel 9.590 6.344\nTotal suspended solids 204.800 97.400\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(c) Acid reclaim leaching belt filter backwash.\nNSPS for the Secondary Nickel Subcategory\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of acid reclaim nickel produced\nChromium (total) 0.528 0.216\nCopper 2.278 1.199\nNickel 2.302 1.523\nTotal suspended solids 49.160 23.380\npH (1) (1)\n1 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 V—Secondary Nickel 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":"8e1f8e3a0ecfc872d9e4dc3bfa8a5ad4a937f97bf63f6942c29ded1904cf8ed6","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-421.242-421.243","next":"us/40-cfr-421.245"},"notice":"GroundRules: Original legal text. Not legal advice."}