Illinois Administrative Code
Title 35 - ENVIRONMENTAL PROTECTION
Part 355 - DETERMINATION OF AMMONIA NITROGEN WATER QUALITY BASED EFFLUENT LIMITS FOR DISCHARGES TO GENERAL USE WATERS
Subpart B - AMMONIA NITROGEN (as N) WATER QUALITY STANDARDS AND WQBELs
Section 355.207 - Mixing Allowance

If the PEQ for ammonia nitrogen (as N) is greater than the water quality standard, the Agency shall assess the level of treatment being provided by the discharger. If the discharger is providing (or will be providing) a level of treatment consistent with the best degree of treatment required by 35 Ill. Adm. Code 304.102(a), the PEQ derived under Section 355.205 shall be compared to the PEL determined by applying allowed dilution to the discharge consistent with Section 355.209.