Again, we do regular testing to determine whether this has been the case. If we know something has migrated, we will immediately alert local stakeholders.
We'll also do the same thing if we think there is the potential. Again, as we assess a site, we're looking at three things: the contaminant, the pathways and the receptors. If the pathways and receptors suggest there is a risk of off-site migration, even if it hasn't happened yet, we will engage local stakeholders.