This is a very compelling video from a concerned citizen who decided to take his own samples of oil found on the beach in Grand Isle, La and have them tested at a laboratory. In the water portion of the sample the lab found propylene glycol, an ingredient in Corexit 9500 and Corexit 9527A, at an estimated concentration of 430 parts per million. Propylene glycol only makes up 1-5% of the Corexit products, so, if this is indeed propylene glycol from Corexit then the concentration of Corexit as a whole is far higher.