Illinois Administrative Code
Title 35 - ENVIRONMENTAL PROTECTION
Part 352 - PROCEDURES FOR DETERMINING WATER QUALITY BASED PERMIT LIMITATIONS FOR NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM DISCHARGERS TO THE LAKE MICHIGAN BASIN
Subpart C - ASSESSING HUMAN HEALTH IMPACTS OF MULTIPLE TOXIC SUBSTANCES INCLUDING ADDITIVITY PROCEDURES FOR CHLORINATED DIBENZO-P-DIOXINS AND CHLORINATED DIBENZOFURANS
Section 352.302 - Values for 2,3,7,8-TCDD Toxicity Equivalence Concentrations
Current through Register Vol. 48, No. 38, September 20, 2024
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 (TECTCDD) 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 |
