Tampabay.com | Study: Dispersant used to clean 2010 BP oil spill harmed humans Tampabay.com The NIH study is the first to look at human health impacts of using dispersants to break up oil spills, a common oil industry approach to dealing with such disasters. With Deepwater Horizon, BP sprayed nearly 2 million gallons of a dispersant called ... Study: Oil spill cleanup workers exposed to harmful chemicals |