35 Ill. Adm. Code 309.184
Regulatory Relief
Section 309
Section 309.184 Regulatory
Relief
To the extent authorized by the
CWA and the Act, the Board may grant variances, adjusted standards, or time
limited water quality standards from standards, limitations, and requirements
imposed by these NPDES rules. If the Board grants a variance, adjusted
standard, or time-limited water quality standard, the Board must order the
Agency to issue or modify an NPDES Permit consistent with the Board Order, the
CWA, federal NPDES regulations, and the Act.