35 Ill. Adm. Code 309.142
Water Quality Standards and Waste Load Allocation
Section 309
Section 309.142 Water
Quality Standards and Waste Load Allocation
If an NPDES Permit includes as
conditions the effluent standards and limitations described in Sections
309.141, 309.142, and 309.143, the Agency must determine and verify that the
discharge authorized by the permit will not violate applicable water quality standards
or a schedule of compliance to achieve applicable water quality standards
contained in the NPDES Permit. If an NPDES Permit applies any more stringent
effluent limitation based on applicable water quality standards, a waste load
allocation must be prepared to ensure that the discharge authorized by the
permit is consistent with applicable water quality standards.