Cook is reported to be both expert, and aware of the precautionary principal.
As a federal employee he does not have policy responsibilities - he is a scientific researcher. His presentation will be worth attending by anyone concerned with the situation.
If the stuff is used in paving, and a hazard, why do it? For money?
That's really crass and disdainful of all of us potentially at risk.
Is a five-figure consulting fee worth putting that risk on the rest of us?
In closing: It is doubtful that Cook will have definitive answers. It would be improper to expect that. A study that will last at least three years has just been started.
However, Cook will be able to tell the public what he knows, as background, while we keep the politicians' and researchers' feet to the fire to not compromise the health and safety of Minnesotans.