As I was saying, they've done an extensive amount of work to establish what are intended to be effective containment zones. In addition to that, we've required them to expand the groundwater monitoring infrastructure all through the impacted area. They've drilled in excess of 115 monitoring wells across the area. That helps delineate the reach of this contaminant.
As you know, this was in northern Canada, and the temperatures are such that many of those wells are still frozen. Water is just beginning to move, mostly on the surface right now, and we'll have extensive monitoring throughout the period.
In addition to that, Imperial has been required to have further mitigation, so that if it isn't working the way they intend, it's about what's next and what's next. As is normal for any regulator, we will continue to escalate as required and as the evidence requires.