Scientists and residents are questioning how chemicals shockingly similar to those used in the BP Deepwater Horizon gulf oil spill, and Exxon Valdez tanker spill disasters, would end up in the Kalamazoo River from Marshall, Michigan to more than 40 miles downriver. In the aftermath of the 2010 Kalamazoo oil spill Enbridge was fined for each gallon of oil recovered. Chemical dispersant breaks up oil into unrecoverable particles. Both Enbridge and the EPA have denied that any dispersants were used.