PFAS are well characterized, as I've explained earlier in some of the comments I've made. There's a well-defined body of science that shows effects on health, including on multiple organisms and systems, including the liver, the kidneys, the thyroid, the immune system and the nervous system. There are also reproductive and developmental effects. The risks from PFAS have been well characterized in a lot of the science publications that have been put forward.
I don't know the specifics, necessarily, of the Petawawa base, but I can say that a drinking water quality objective has been established by Health Canada that identifies a threshold toward which it would be the expectation of all provincial, municipal and federal entities to strive. That would not mean that a single exceedance would cause dramatic health effects. However, it's exposure over time that we would be concerned about with regard to increasing the health risks of the issues I just outlined.