Ill. Admin. Code tit. 35 § 352.302

Current through Register Vol. 48, No. 49, December 6, 2024

Section 352.302 - Values for 2,3,7,8-TCDD Toxicity Equivalence Concentrations

a) For discharges in the Lake Michigan basin containing one or more 2,3,7,7,8-substituted chlorinated dibenzo-p-dioxins or 2,3,7,8-substituted dibenzofurans, the 2,3,7,8-TCDD toxicity equivalence concentration (TEC_TCDD) shall be determined as outlined in subsection (b).

b) The values listed in this Table 1 shall be used to determine the 2,3,7,8-TCDD toxicity equivalence concentrations using the following equation:

TECTCDD

=

[SIGMA]

CxTEFxBEFx

where:

TECTCDD	=	2,3,7,8-TCDD toxicity equivalence concentration in effluent
Cx	=	Concentration of total chemical x in effluent
TEFx	=	TCDD toxicity equivalency factor for x
BEFx	=	TCDD bioaccumulation equivalency factor for x

TABLE 1
Congener	TEF	BEF
2,3,7,8-TCDD	1.0	1.0
1,2,3,7,8-PeCdd	0.5	0.9
1,2,3,4,7,8-HxCDD	0.1	0.3
1,2,3,6,7,8-HxCDD	0.1	0.1
1,2,3,7,8,9-HxCDD	0.1	0.1
1,2,3,4,6,7,8-HpCDD	0.01	0.05
OCDD	0.001	0.01
2,3,7,8-TCDF	0.1	0.8
1,2,3,7,8-PeCDF	0.05	0.2
2,3,4,7,8-PeCDF	0.5	1.6
1,2,3,4,7,8-HxCDF	0.1	0.08
1,2,3,6,7,8-HxCDF	0.1	0.2
2,3,4,6,7,8-HxCDF	0.1	0.7
1,2,3,7,8,9-HxCDF	0.1	0.6
1,2,3,4,6,7,8-HpCDF	0.01	0.01
1,2,3,4,7,8,9-HpCDF	0.01	0.4
OCDF	0.001	0.02

Ill. Admin. Code tit. 35, § 352.302