It's total loading and some of the issues associated with the release of municipal sewage treatment effluent into the Athabasca from Fort McMurray. That will contribute to metal loadings and this type of thing. It will also contribute to PAHs. The same ones that you get as a runoff from highways are the same PAHs that we're worried about in terms of oil sands activity.
There are two issues to that. One is you have to find out what the cumulative impact is, what the total impact on the environment is. Then, as a secondary, you can start partitioning that to figure out who's responsible for what. In terms of my perspective of trying to protect the environment, I'm rather more concerned about the total impact at the present time. Then we'll worry about who we're going to blame later.