Yes. That's one of the perennial challenges. This is very much a research program in some ways. We understand some types of aquifers very well and can tell you what's going to happen with them from studies of other ones. This buried valley kind of aquifer is a little different, and we don't understand it quite as well. You always have to go on the principle that as much as you know, you try to give the best advice you can about the things you have to consider. But it is very much a research project, and we don't really know enough to be definitive.
On June 9th, 2009. See this statement in context.