{"data":{"id":"us/40-cfr-appendix-a-to-part-439","jurisdiction":"us","citation":"40 CFR Appendix A to Part 439","heading":"Appendix A to Part 439—Tables","body":"Table 1—Surrogate Parameters for Direct Dischargers\n[Utilizing biological treatment technology]\nRegulated parameters Treatability class\nAmyl alcohol Alcohols.\nEthanol 1\nIsopropanol 1\nMethanol 1\nPhenol\nIsobutyraldehyde 1 Aldehydes.\nn-Heptane 1 Alkanes.\nn-Hexane 1\nDiethylamine 1 Amines.\nTriethylamine\nBenzene Aromatics.\nToluene 1\nXylenes 1\nChlorobenzene\no-Dichlorobenzene\nChloroform 1 Chlorinated Alkanes.\nMethylene chloride 1\n1,2-Dichloroethane 1\nEthyl acetate 1 Esters.\nIsopropyl acetate\nn-Amyl acetate\nn-Butyl acetate\nMethyl formate\nTetrahydrofuran 1 Ethers.\nIsopropyl ether\nAcetone 1 Ketones.\n4-Methyl-2-pentanone (MIBK)\nAmmonia (aqueous) Miscellaneous. 2\nAcetonitrile\nMethyl Cellosolve\nDimethyl Sulfoxide\n1 These parameters may be used as a surrogate to represent other parameters in the same treatability class.\n2 Surrogates have not been identified for the “Miscellaneous” treatability class.\nTable 2—Surrogate Parameters for Indirect Dischargers (Utilizing Steam Stripping Treatment Technology)\nRegulated parameters Treatability class\nBenzene\nToluene 1\nXylenes\nn-Heptane High strippability.\nChloroform 1\nMethylene chloride 1\nChlorobenzene\nAmmonia (aqueous)\nDiethyl amine\nTriethyl amine\nAcetone 1\n4-methyl-2-pentanone\nn-Amyl acetate\nn-Butyl acetate\nEthyl acetate Medium strippability.\nIsopropyl acetate\nMethyl formate\nIsopropyl ether\nTetrahydrofuran 1\n1,2-dichloroethane\no-Dichlorobenzene\n1 These parameters may be used as a surrogate to represent other parameters in the same treatability class.","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER N—EFFLUENT GUIDELINES AND STANDARDS","PART 439—PHARMACEUTICAL MANUFACTURING POINT SOURCE CATEGORY"],"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":"5357dc1121ab634c9f1aa5d88f1d18b6dbf0e8f77bf28e0b65166aa68e68cee1","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-439.52","next":"us/40-cfr-440.10"},"notice":"GroundRules: Original legal text. Not legal advice."}