Thank you, Mr. Chair.
I'd like to thank the many witnesses for being with us. I assume that, among the group of people who are here with us, someone will have the necessary knowledge to answer the question I'm going to ask.
In the letter that the Minister of Transport sent to the communities and first nations living in Fort Chipewyan, it was mentioned that, according to the latest risk assessment report, there would be no risks to human health in activities such as swimming, launching, traditional food management and recreational activities, among others.
I'm wondering to what extent that can be asserted. I know that in science, there is a basic principle of exposure, in this case exposure to contaminants. For example, if I have radon in my basement and I spend an hour a day there, it doesn't look like I'm at too much risk of getting cancer. However, if I'm there 12 hours a day, I may be at greater risk of that happening.
In this case, that statement doesn't tell us much about the degree of risk involved. Is it the same for someone who swims in that water every day as it is for someone who swims in that water once a year? How do we find out?