Here's the blog of a Dr which may be a 1st step to look out (if you watch what is analysed, it matches with what is said in the video, even if the quantities look much lower):
Oil Spill Air Quality Updates for the Gulf Coast - Updated 6/24/10
It looks like that person works well.
Also I've seen that some people are already cleaning some regions and they have anormal strong headaches. Further researches through valuable sources may be interesting. I just pointed for who cares one or two directions.