I wonder about how that dispersant will work once it comes down as rain on our land? Many storms originate in the Gulf and travel up into the Ohio valley and beyond. What will this to to our food?
How is that going to happen? Are you familiar with the scientific principles of evaporation? When it rains, does it rain salt-water or does it rain fresh-water? Yep, it's fresh-water. Why? Because dissolved solids (NaCl in this instance) aren't atmospherically transferred in the evaporation process.
While it's possible some of these chemicals will atmospherically evaporate, it's unlikely to be in a quantity that is even measurable.
Here's some video showing what has already happened: Mystery Crop Damage Threatens Hundreds Of Acres