RESPONDENT VIOLATED THE CWA BY DISCHARGING WASTEWATER TO THE GRAND ISLAND, NEBRASKA WASTEWATER TREATMENT PLANT AT LEVELSWHICH CAUSED THE CITY OF GRAND ISLAND, NEBRASKA TO VIOLATE ITS NPDES PERMIT ON AT LEAST FIVE OCCASIONS. IN MARCH 2008, THIS INTERFERENCE RESULTED IN A SUBSTANTIAL FISH KILL IN THE WOOD RIVER AND THE PLATTE RIVER.