Tables

Table 1—Surrogate Parameters for Direct Dischargers [Utilizing biological treatment technology] Regulated parameters Treatability class Amyl alcohol Alcohols. Ethanol 1 Isopropanol 1 Methanol 1 Phenol Isobutyraldehyde 1 Aldehydes. n-Heptane 1 Alkanes. n-Hexane 1 Diethylamine 1 Amines. Triethylamine Benzene Aromatics. Toluene 1 Xylenes 1 Chlorobenzene o-Dichlorobenzene Chloroform 1 Chlorinated Alkanes. Methylene chloride 1 1,2-Dichloroethane 1 Ethyl acetate 1 Esters. Isopropyl acetate n-Amyl acetate n-Butyl acetate Methyl formate Tetrahydrofuran 1 Ethers. Isopropyl ether Acetone 1 Ketones. 4-Methyl-2-pentanone (MIBK) Ammonia (aqueous) Miscellaneous. 2 Acetonitrile Methyl Cellosolve Dimethyl Sulfoxide 1 These parameters may be used as a surrogate to represent other parameters in the same treatability class. 2 Surrogates have not been identified for the “Miscellaneous” treatability class. Table 2—Surrogate Parameters for Indirect Dischargers (Utilizing Steam Stripping Treatment Technology) Regulated parameters Treatability class Benzene Toluene 1 Xylenes n-Heptane High strippability. Chloroform 1 Methylene chloride 1 Chlorobenzene Ammonia (aqueous) Diethyl amine Triethyl amine Acetone 1 4-methyl-2-pentanone n-Amyl acetate n-Butyl acetate Ethyl acetate Medium strippability. Isopropyl acetate Methyl formate Isopropyl ether Tetrahydrofuran 1 1,2-dichloroethane o-Dichlorobenzene 1 These parameters may be used as a surrogate to represent other parameters in the same treatability class. [63 FR 50437, Sept. 21, 1998; 64 FR 10393, Mar. 4, 1999, as amended at 68 FR 12275, Mar. 13, 2003]