GCI, INC. (GCI) IS AN ELECTROPLATER THAT HAS PRODUCED CIRCUIT BOARDS SINCE 1967. THE COMPANY DISCHARGES EFFLUENTS INTO BRANCH NO. 7 OF WILLOW CREEK UNDER A NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM (NPDES) PERMIT ISSUED JANUARY 10, 1984. THE STATE OF INDIANA ENTERED INTO A CONSENT DECREE WITH GCI ON OCTOBER, 1984 TO CORRECT PROBLEMS CAUSED BY AN OIL SPILL LAND CONTINUING EFFLUENT VIOLATIONS. THE CONSENT DE- CREE REQUIRED GCI TO DREDGE THE METAL CONTAMINATED SEDIMENTS IN THE DISCHARGE STREAM AND TO MEET DISCHARGE STANDARDS. IT ALSO SET A MORE LENIENT COPPER LIMIT THAN THAT OF THE NPDES PERMIT AND PROVIDED FOR INTERIM WASTEWATER TREATMENT. THE CONSENT DECREE ALLOWED GCI TO TIE INTO A PROPOSED REGIONAL INTERCEPTOR SEWER BY SEPTEMBER, 1986, OR TO BUILD ITS OWN FINAL WASTEWATER TREATMENT PLANT BY MARCH 1, 1987. GCI PAID A $20,250 PENALTY.