The Imperial containment facility has always had deep intercept wells. If there's any evidence that there might be something moving through within the containment system, those products would be moved back into the tailings system.
What we do know is that there was an impacted area, and it's just thawing now. It will take a bit of time to see whether that seepage is contained in a steady state, or whether in fact there's any evidence that anything's moving this spring.