40 CFR Appendix A to Part 439: Appendix A to Part 439—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.