On November 25, 1990 and February 15, 1992, Marathon Oil Company discharged contaminants from a refinery owned and operated by Marathon in Indianapolis. Approximately 3,000 gallons of jet fuel/kerosene were discharged in 1990; in 1992 an estimated 1.470 gallons of slop oil were discharged. The spills entered Oil Creek, Crooked Creek and other waters of the United States and the State of Indiana. In total, approximately 9.24 miles of riverine habitat and 50 acres of wetland habitat were impacted. Oil and Crooked Creeks are narrow, forested corridors which exist in a suburban residential setting.