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Table 9 to Subpart GGG of Part 63—Default Biorates for Soluble HAP

Default Biorates for Soluble HAP

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Displayed edition2026-04-27
Last updated2026-04-27

Table 9 to Subpart GGG of Part 63—Default Biorates for Soluble HAP

Compound nameBiorate (K1),

L/g MLVSS-hr
Acetonitrile0.100
Acetophenone0.538
Diethyl sulfate0.105
Dimethyl hydrazine(1,1)0.227
Dimethyl sulfate0.178
Dinitrotoluene(2,4)0.784
Dioxane(1,4)0.393
Ethylene glycol dimethyl ether0.364
Ethylene glycol monobutyl ether acetate0.496
Ethylene glycol monomethyl ether acetate0.159
Isophorone0.598
Methanola
Nitrobenzene2.300
Toluidine (-0)0.859
Triethylamine1.064
a For direct dischargers, the default biorate for methanol is 3.5 L/g MLVSS-hr; for indirect dischargers, the default biorate for methanol is 0.2 L/g MLVSS-hr.

[66 FR 40137, Aug. 2, 2001]