As you mentioned, the responsibility for de-icing fluids like those being used at the airport in Montreal, in fact, rests with Transport Canada. It is the authority that regulates all airport activities, including de-icing and the recovery of de-icing fluids.
I'm not aware of data indicating particularly high levels of de-icing fluid in the river, but certainly we could go back and have a look to see what the data actually indicates.
It is one of the things that we would turn to our colleagues at Transport Canada for, to alert us that they have a problem with their de-icing collection and recovery system. Again, we would have to look at the data specifically.