Thank you for that explanation.
I'd like to move off that for one second and ask, Mrs. Lean, about the comment you made with respect to industry being responsible for monitoring on-site impacts and monitoring implications of various activities on site, but off site--and you've given an example of taking blood samples--not being responsible. Can you try to define a little more clearly how you see that? In other words, what do you see as the responsibility of your industry to monitor its activities and the implications of its activities, both on its site and then, say, in the surrounding community? Where do you draw that line? There's an important distinction.