That would ultimately be up to a court to decide, but where the trucking company is at fault, they are responsible.
Most provinces have what is called pejoratively a “spills bill”, legislation which holds that you are required to pay the costs of cleanup. The concern we have is that some shippers will try to protect themselves through freight contracts by saying that even where it's perhaps not the trucking company who is at fault—let's say there was improper documentation, improper loading where the shipper was responsible, that sort of thing—the shipper is not liable even if it was negligent. That's just not right.