I have been around chemicals and am pretty well versed in EPA laws and regulations. I had to be because I was responsible for decent quantities of agricultural chemicals that I kept on the job sites I managed.
According to the EPA and OSHA, the Material Data Safety Sheet and the Label for the chemical are the Law. No ifs ands or buts about it. Strait up, they are the law. So if I was to ignore the instructions on a Material Data Safety Sheet or on a Product Label and misapply a chemical, I could be fined and sent to jail.
That is on a small scale, like if I put insecticide to close to a lake or something. Which I have never done by the way. Even if they had only filled up a 2 gallon pump sprayer with the stuff and sprayed the ocean with it, and that was all they had done. They would still be breaking the law and be subject to fines and jail time.
So then you have to ask yourself. Who is so above the laws of the EPA and the Federal Government that they are allowed to misapply chemicals where the Label and MSDS clearly say not to? The answer is that no one is above these laws. Even if they think they are, they are not.
I think that it is time for a class action law suit against what ever company was applying / is applying the Corexit. The people that have been effected have a legal right to do this. We also have the right to demand that the EPA actually enforces these laws when ever they are supposed to. The EPA is an agency that was created to protect us from things like this. That is what is supposed to separate the United States of America from countries that have no agency to enforce such things.
I would be willing to make a bet that exactly what I have outlined here is on the horizon. I am not the only one that knows these strait forward simple laws about chemical usage. There are plenty of legal experts around that specialize in environmental law. This is going to happen. It will be interesting to see who is set out to pasture when it does.