Ill. Admin. Code tit. 35 § 352.540
Current through Register Vol. 49, No. 2, January 10, 2025
If the PEQ is more than either 1.0 TU[a] or 1.0 TU[c], or as otherwise provided in Section 352.530, the Agency will determine eligibility for a dilution allowance consistent with Section 352.422. The preliminary effluent limitation (PEL) expressed in terms of acute and chronic toxicity units (TU[a] and TU[c]) shall be calculated pursuant to Section 352.423. Unless there is data indicating otherwise, the pollutant concentration in the background water (Cd) will be assumed to be zero.
Ill. Admin. Code tit. 35, § 352.540