In order to get on CEPA's schedule 1, the ministers have to convince the Governor in Council. They have to provide enough information that something meets the criteria under CEPA, paragraphs 64(a), (b), or (c): that it harms the environment, that on which life depends, or human health. At the end, this is the threshold that needs to be cleared.
If you go back to the beginning, the risk assessments that the two departments do are quite rigorous, in both our departments' opinions. They attempt to properly identify the risks and provide sound scientific advice for the ministers as they move forward. They are peer-reviewed, and they do not have an objective of let's declare everything toxic or not. They are intended to be balanced science representations, and there are processes in both departments—science advisory boards—about how these people are promoted and their performances are dealt with, based on their objectivity in this regard.
So at the end of the day we have to produce a risk assessment that deals with our understanding of the risk to the environment, human health, or that on which life depends.
We are also required to look at whether there is a potential for this substance in terms of how it releases into the environment and how it breaks down. We look at different age groups. If we feel there are obvious mixtures, we can look at those as we do them. So we take a look at the chemical, how it's used, the products it's used in, and the potential for exposure. Then based on this, we provide advice for the ministers.