Transport Canada was not responsible for the emergency evacuation, so I can't speak to the approach that was given.
What I can say is that with the updated guidance for the federal contaminated sites, we have updated our practices. Before, we would have notified only if there were a risk. Now when we are starting studies, either in phase one or phase two, we involve nations in the scoping of those studies at the outset. We have evolved our practices, and we will continue to do so.