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1 ' <br /> 25. "Unauthorized Corrâ–ºbined Sewer Overflow"means an overflow, spill,diversion,or <br /> release of wastewater from or caused by Respondent's Combined Sewer System(s). This <br /> term will inciude: (i)an unpennitted discharge from the Respondent's Combined Sewer <br /> System(s)to waters of the United States (Unauthorized Combined Sewer Discharge); and <br /> (ii)any release of wastewater from the Respondent's Combined Sewer System(s)to <br /> public or private property that does not reach waters ofthe United States, including <br /> Backups. This does not include wet weather discharges from SDD's pertnitted <br /> Combined Sewage Overflow(CSO)facilities. <br /> 26. "Wastewater Treatment Plant(s)" or"WWTF(s)"means any wastewater treatment plants <br /> operated by Sanitary District of Decatur(SDD)under National Pollutant Discharge <br /> Elimination System(NPDES)Permit Number IL0028321 and located at 501 Dipper <br /> Lane,Decatur, Illinois and all components of the permitted sewage treatment plants. <br /> FINDINGS <br /> 27. Respondent is a municipality incorporated under the laws of the State of Illinois. <br /> Respondent maintains a system of separate and combined sewers to convey sanitary <br /> sewage to treatment by the SDD. <br /> 28. On December 27,2011,Respondent received an Information Request,pursuant to <br /> Section 308 of the CWA,which included a checklist for Respondent to coinplete and <br /> return to EPA. Respondent responded to this information reyuest on Februax-y 13, 2012 <br /> with the checklist and the majority of the requested information. <br /> 29. On May 30,2012, EPA called Respondent and discussed questions concerning <br /> Respondent's February 13, 2012 submittal. Respondent sent EPA an email on June 1, <br /> 2012 with additional infoz7mation that was requested during the phone discussion. <br /> 30.Respondent owns and operates both a Combined Sewer Collection System and a Separate <br /> Sanitaty Sewer Collection Sysfiem,both of.which discharge into the SDD system. <br /> 31. SDD owns and operates four Combined Sewage Overflow(CSO)facilities within <br /> RespondenYs city limits. The four CSOs are permitted in SDD's NPDES permit <br /> (1L0028321)with the following names: Outfa11003 Oakland Avenue Treated Combined <br /> Sewage Outfall,South Edward Street Treated Combined Sewage Outfall,McKinley <br /> Avenue Treated Combined Sewage Outfall, and Seventh Ward Treated Combined <br /> Sewage Outfall. <br /> 32.Respondent maintains a Storm Water Sewer System(NPDES permit number ILR400181) <br /> for the areas that contain a Separated Sanitary Sewer System. The Storm Sewer System <br /> has final dispositions to Lake Decatur and the Sangamon River. Lake Decatur and the <br /> Sangamon River are waters of tlae United States and thus"navigable waters"pursuant to <br /> Section 502(7)of the CWA, 33 U.S.C. § 1362(7). <br /> 4 <br />