Abstract
Abstract As part of the response strategy, dispersant was applied to oil from the MC252 Deepwater Horizon both at the surface and at the well head. Around 90% of the dispersant used was Corexit EC9500A, with a small amount of Corexit 9527 used during the initial stages of the response. In total, around 1.8 million gallons of dispersants were applied. The purpose of the dispersant was as follows: Remove oil from the surface and enhance its microbial degradation within the water column Reduce airborne concentrations of volatile organic compounds (VOCs) around the source site Reduce the amounts of oil ultimately reaching the shoreline. Corexit EC9500A contains several surface active agents in a solvent package; all of the components are individually used in other formulations in cosmetics, medicines, or cleaning products. This report focuses on one of these, dipropylene glycol n-butyl ether (DPnB), a component of the solvent package with weak surfactant properties itself. Corexit EC9500A contains two isomers...
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