[Wonder Warthog]

“But oil spills stop the normal process because the oil combines with sediment and it leads to an accumulation of arsenic in the water over time,” he said. “Arsenic only needs to be a 10th of a part per billion to cause problems.”

Hey, joe. Guess what keeps the OIL from combining with the SEDIMENTS. Those nasty, evil old DISPERSANTS, that's what. The dispersants keep the oil in solution and suspension, and prevent such combination. So this looks like another place where the use of dispersants was A GOOD THING.

[mojitojoe]

BS