many years ago, maybe 40?, there was a large tank? container of sulfuric acid in the Chesapeake Bay near Mathews County. I cannot recall the circumstances, and this was when container ships were just starting. I know folks were worried about if it leaked would there be a cloud of gas, there was quite a bit of concern. When a diver went to check on it, just a couple days later, container was empty, no clouds of gas, no effect on fish, everything was ok.