I have three quick responses.
First of all, there was a misstatement earlier. It is not the railways that prepare the ERAPs. It's the producers or the importers of the substance that's regulated that prepare the ERAPs and how they have to be administered. That's an important piece of information for you right there, to make sure you understand.
Again, that ERAP will talk about the means of containment, and that will differ depending on the commodity in question. Certainly, you may wish to look a little deeper into toxic inhalation hazards and those few substances—whether that's ammonia, chlorine or ethylene oxide—and how those get managed.
One of the things to remember, when the question about prevention comes up—and this is really important too—is that, when industry has the choice, it will not ship those products. If you're making ethylene oxide, and you have a customer who wants to turn it into another product, guess what? You're going to locate on that site where it's produced, so it doesn't have to go on the tracks to begin with.
However, when you talk about farming and having to move around anhydrous ammonia, or water treatment for municipalities, these goods must be moved. There are residual risks that can't be overcome, but the questions are: Are we taking more steps for prevention, and are we better prepared to respond? Those are two different questions, and they're both very important for the business of this committee.