The Sierra Club June 14th letter states that Trump International holds a Clean Water Act National Pollution Discharge Elimination System (“NPDES”) permit obtained from the Illinois Environmental Protection Agency. It cites Special Condition 8 of the permit, which is quoted as stating: In order for the Agency to evaluate the potential impacts of cooling water intake structure operations pursuant to 40 C.F.R. § 125.90(b), the permittee shall prepare and submit information to the Agency outlining current intake structure conditions at this facility, including a detailed description of the current intake structure operation and design, description of any operational or structural modifications from original design parameters, source waterbody flow information, or other information as necessary. This information shall also include a summary of historical 316(b) related intake impingement and/or entrainment studies, if any, as well as current impingement mortality and/or entrainment characterization data; and shall be submitted to the Agency within six (6) months of the permit’s effective date.