Illinois Administrative Code
Title 35 - ENVIRONMENTAL PROTECTION
Part 309 - PERMITS
Subpart A - NPDES PERMITS
Section 309.141 - Terms and Conditions of NPDES Permits
Current through Register Vol. 48, No. 12, March 22, 2024
In establishing the terms and conditions of each issued NPDES Permit, the Agency must apply and ensure compliance with all of the following, whenever applicable:
a) Effluent limitations under sections 301 and 302 of the CWA;
b) Standards of performance for new sources under section 306 of the CWA;
c) Effluent standards, effluent prohibitions, and pretreatment standards under section 307 of the CWA;
d) Any more stringent limitations, including those:
e) Any more stringent legally applicable requirements necessary to comply with a plan approved under section 208(b) of the CWA;
f) Before the Administrator of the U.S. Environmental Protection Agency promulgates applicable effluent standards and limitations under sections 301, 302, 306, and 307 of the CWA, any conditions that the Agency determines are necessary to carry out the CWA;
g) If the NPDES Permit is for the discharge of pollutants into navigable waters from a vessel or other floating craft (except that an NPDES Permit must not be issued for the discharge of pollutants from a vessel or other floating craft into Lake Michigan), any applicable regulations promulgated by the Secretary of the Department in which the Coast Guard is operating, establishing specifications for safe transportation, handling, carriage, storage and stowage of pollutants; and
h) If the NPDES Permit is for the discharge of pollutants from other than wet weather point sources into the Lake Michigan Basin as defined at 35 Ill. Adm. Code 303.443:
WHERE:
(TEC)TCDD |
= |
2,3,7,8-TCDD toxicity equivalence concentration in effluent |
(C)x |
= |
Concentration of total chemical x in effluent |
(TEF)x |
= |
TCDD toxicity equivalency factor for x |
(BEF)x |
= |
TCDD bioaccumulation equivalency factor for x |
TABLE |
||
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 |
0.0 |
OCDD |
0.001 |
0.0 |
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 |
0.0 |
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 |
0.0 |
1,2,3,4,7,8,9-HpCDF |
0.01 |
0.4 |
OCDF |
0.001 |
0.0 |
PEQ = (maximum data point)(statistical multiplier)
Coefficient of Variation |
|||||||||||||
No. Samples |
0.1 |
0.2 |
0.3 |
0.4 |
0.5 |
0.6 |
0.7 |
0.8 |
0.9 |
1.0 |
1.1 |
1.2 |
1.3 |
1 |
1.4 |
1.9 |
2.6 |
3.6 |
4.7 |
6.2 |
8.0 |
10.1 |
12.6 |
15.5 |
18.7 |
22.3 |
26.4 |
2 |
1.3 |
1.6 |
2.0 |
2.5 |
3.1 |
3.8 |
4.6 |
5.4 |
6.4 |
7.4 |
8.5 |
9.7 |
10.9 |
3 |
1.2 |
1.5 |
1.8 |
2.1 |
2.5 |
3.0 |
3.5 |
4.0 |
4.6 |
5.2 |
5.8 |
6.5 |
7.2 |
4 |
1.2 |
1.4 |
1.7 |
1.9 |
2.2 |
2.6 |
2.9 |
3.3 |
3.7 |
4.2 |
4.6 |
5.0 |
5.5 |
5 |
1.2 |
1.4 |
1.6 |
1.8 |
2.1 |
2.3 |
2.6 |
2.9 |
3.2 |
3.6 |
3.9 |
4.2 |
4.5 |
6 |
1.1 |
1.3 |
1.5 |
1.7 |
1.9 |
2.1 |
2.4 |
2.6 |
2.9 |
3.1 |
3.4 |
3.7 |
3.9 |
7 |
1.1 |
1.3 |
1.4 |
1.6 |
1.8 |
2.0 |
2.2 |
2.4 |
2.6 |
2.8 |
3.1 |
3.3 |
3.5 |
8 |
1.1 |
1.3 |
1.4 |
1.6 |
1.7 |
1.9 |
2.1 |
2.3 |
2.4 |
2.6 |
2.8 |
3.0 |
3.2 |
9 |
1.1 |
1.2 |
1.4 |
1.5 |
1.7 |
1.8 |
2.0 |
2.1 |
2.3 |
2.4 |
2.6 |
2.8 |
2.9 |
10 |
1.1 |
1.2 |
1.3 |
1.5 |
1.6 |
1.7 |
1.9 |
2.0 |
2.2 |
2.3 |
2.4 |
2.6 |
2.7 |
11 |
1.1 |
1.2 |
1.3 |
1.4 |
1.6 |
1.7 |
1.8 |
1.9 |
2.1 |
2.2 |
2.3 |
2.4 |
2.5 |
12 |
1.1 |
1.2 |
1.3 |
1.4 |
1.5 |
1.6 |
1.7 |
1.9 |
2.0 |
2.1 |
2.2 |
2.3 |
2.4 |
13 |
1.1 |
1.2 |
1.3 |
1.4 |
1.5 |
1.6 |
1.7 |
1.8 |
1.9 |
2.0 |
2.1 |
2.2 |
2.3 |
14 |
1.1 |
1.2 |
1.3 |
1.4 |
1.4 |
1.5 |
1.6 |
1.7 |
1.8 |
1.9 |
2.0 |
2.1 |
2.2 |
15 |
1.1 |
1.2 |
1.2 |
1.3 |
1.4 |
1.5 |
1.6 |
1.7 |
1.8 |
1.8 |
1.9 |
2.0 |
2.1 |
16 |
1.1 |
1.1 |
1.2 |
1.3 |
1.4 |
1.5 |
1.6 |
1.6 |
1.7 |
1.8 |
1.9 |
1.9 |
2.0 |
17 |
1.1 |
1.1 |
1.2 |
1.3 |
1.4 |
1.4 |
1.5 |
1.6 |
1.7 |
1.7 |
1.8 |
1.9 |
1.9 |
18 |
1.1 |
1.1 |
1.2 |
1.3 |
1.3 |
1.4 |
1.5 |
1.6 |
1.6 |
1.7 |
1.7 |
1.8 |
1.9 |
19 |
1.1 |
1.1 |
1.2 |
1.3 |
1.3 |
1.4 |
1.5 |
1.5 |
1.6 |
1.6 |
1.7 |
1.8 |
1.8 |
20 |
1.1 |
1.1 |
1.2 |
1.2 |
1.3 |
1.4 |
1.4 |
1.5 |
1.5 |
1.6 |
1.6 |
1.7 |
1.7 |
30 |
1.0 |
1.1 |
1.1 |
1.1 |
1.2 |
1.2 |
1.2 |
1.3 |
1.3 |
1.3 |
1.3 |
1.4 |
1.4 |
40 |
1.0 |
1.0 |
1.1 |
1.1 |
1.1 |
1.1 |
1.1 |
1.1 |
1.2 |
1.2 |
1.2 |
1.2 |
1.2 |
50 |
1.0 |
1.0 |
1.0 |
1.0 |
1.0 |
1.0 |
1.0 |
1.1 |
1.1 |
1.1 |
1.1 |
1.1 |
1.1 |
60 or greater |
1.0 |
1.0 |
1.0 |
1.0 |
1.0 |
1.0 |
1.0 |
1.0 |
1.0 |
1.0 |
1.0 |
1.0 |
1.0 |
WHERE:
WQS |
= |
applicable water quality standard, criterion, or value |
Qe |
= |
effluent flowrate |
Qd |
= |
allowable dilution flowrate |
Cd |
= |
background pollutant concentration in dilution water |
* acceptable water column data;
* water column concentrations estimated through the use of acceptable caged or resident fish tissue data; or
* water column concentrations estimated through the use of acceptable or projected pollutant loading data.
i) Best management practices (BMPs) to control or abate the discharge of chloride when: