I'm not sure you can establish it upfront, and that was the point of my remark about why reviews should focus on what is new.
You know, if you're just doing routine culvert construction or routine pipe installation at a river crossing, which has been done many times before, the issue is not to review the impact of that single event, which may be done under a specific permit, but what happens when you put them all together.
What happens, for example, on the Mackenzie River when you do 300 crossings of tributary streams, any one of which may have very little impact, but all of which may have a very substantial impact on the fisheries of the Mackenzie River? You have to figure out how to monitor that.
It's at that level that we need the work, not where somebody is going out and saying, at this very tiny level, “Is there is a grain of sand here? Is there a drop of water there?”