Burrard Inlet (where the tankers will take on the fuel) is a far, far cry from Prince William Sound, the rocky, narrow passage-way to the open-ocean that (along with a number of mitigating human factors) claimed the Exxon Valdez. It is a major error to compare the two locations. Hard to conceive of a tanker in Burrard running aground on a reef.  That's what happened to the Valdez.