For my part, I would have to ask our experts about those types of chemicals. I say that in part because those are not the common types of contaminants that we find on the vast majority of federal contaminated sites. I think I could take that question away and send a response back to the committee. They're not the types of contaminants that we see. This may be, in some cases, the first time I've ever heard of them in a federal context of a contaminated site, so we would have to look into it.
