40 C.F.R. § 439 app A to Part 439
Current through October 31, 2024
Table 1-Surrogate Parameters for Direct Dischargers
[Utilizing biological treatment technology]
| Regulated parameters | Treatability class |
| Amyl alcohol | Alcohols. |
| Ethanol1 | |
| Isopropanol1 | |
| Methanol1 | |
| Phenol | |
| Isobutyraldehyde1 | Aldehydes. |
| n-Heptane1 | Alkanes. |
| n-Hexane1 | |
| Diethylamine1 | Amines. |
| Triethylamine | |
| Benzene | Aromatics. |
| Toluene1 | |
| Xylenes1 | |
| Chlorobenzene | |
| o-Dichlorobenzene | |
| Chloroform1 | Chlorinated Alkanes. |
| Methylene chloride1 | |
| 1,2-Dichloroethane1 | |
| Ethyl acetate1 | Esters. |
| Isopropyl acetate | |
| n-Amyl acetate | |
| n-Butyl acetate | |
| Methyl formate | |
| Tetrahydrofuran1 | Ethers. |
| Isopropyl ether | |
| Acetone1 | 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 | |
| Toluene1 | |
| Xylenes | |
| n-Heptane | High strippability. |
| Chloroform1 | |
| Methylene chloride1 | |
| Chlorobenzene | |
| Ammonia (aqueous) | |
| Diethyl amine | |
| Triethyl amine | |
| Acetone1 | |
| 4-methyl-2-pentanone | |
| n-Amyl acetate | |
| n-Butyl acetate | |
| Ethyl acetate | Medium strippability. |
| Isopropyl acetate | |
| Methyl formate | |
| Isopropyl ether | |
| Tetrahydrofuran1 | |
| 1,2-dichloroethane | |
| o-Dichlorobenzene |
1 These parameters may be used as a surrogate to represent other parameters in the same treatability class.
40 C.F.R. 439 app A to Part 439