Yes. There are some sites near the Lachine Canal in particular. I believe there are two sites in the Old Port of Montreal and another one on île Bouchard, by the Island of Montreal. There are 15 class 1 sites with contaminants. That is why they are now considered contaminated sites. Not all the sites are the same. Some contain fuels with benzene and other toxic substances.
On May 8th, 2012. See this statement in context.