ILLINOIS EPA HAS INFORMALLY REQUESTED ASSISTANCE FROM EPA REGION 5 REGARDING THIS FACILITY, WHICH SUFFERS FROM INADEQ WASTEWATER TREATMENT CAPACITY DUE TO DESIGN FLAWS IN PLANT AND IN ITS WASTEWATER SYSTEM. COMBINED SEWER OVERFLOWS BEEN DOCUMENTED BY IEPA AS FLOWING INTO THE SYLVAN SLOUGH, A SURROUNDING AREA THAT IS ENVIRONMENTALLY SENSITIVE.