Oil tankers, often smaller ones, have been moving along Canada's West Coast since the 1930s. In 2015, tankers accounted for about 1400 departures, or 0.75 per cent of total.  However, the East Coast has about 4,000 inbound tanker trips, 1/5th of the 20,000 total vessel trips. All of these bring crude, often from oppressive regimes like Saudi Arabia and Venezuela.  Over 82 million tonnes of petroleum products are moved in and out of 23 Atlantic Canada ports yearly ... 

In Quebec, 25 million tonnes of crude oil and various petroleum products are moved yearly with 89% of crude shipments through Quebec City and Montreal. Also consider that offshore oil drilling has been a part of the East Coast economy for some time. Nothing like that exists out west.

So, if we're  so concerned about West Coast marine tanker traffic then let's start stomping our feet to get this stopped on the East Coast,  all the while advocating for the Energy East pipeline.