I understand, and in the main I think you've heard different people say that it's laudatory that we would be attempting to upgrade, if you like, the protection. But I think it's an important context for people to know that this is something of an apprehended need.
Do we have any evidence that the lower standards have permitted pollution even at the lower levels of activity that you were describing before? Have there been issues and problems up to now in that area that we're aware of in our vigilance from our current zone?