I'm happy to try to answer that question for you, not considering the specific site that you're speaking of. I think one of the foremost mitigation measures for mercury contamination in large reservoirs—we're not building a lot of them anymore, but in the event that we do—is harvesting of the native vegetation around the potential inundation of the reservoir, so deforesting the area that will be inundated and trying to get that root matter and detritus up off the mat so that methyl mercury is not generated.
I think in some cases, the Canadian Shield, for example, where you have very shallow topsoil, very shallow organic matter on top of bedrock, to some extent it can be self-mitigating. You don't have that large amount of detritus that would generate the mercury contamination. When it comes to the Hudson Bay Lowland areas, though, where you have a lot of the deposition from the glaciers, you would see that effect more. Again, it is a bit site-specific.