FILE PHOTO: The Irving Oil refinery is photographed at sunset

FILE PHOTO: The Irving Oil refinery is photographed at sunset on in Saint John, New Brunswick, March 9, 2014. The refinery, built by the Irving family in 1960, is the largest refinery in Canada and is the source of nearly one in three tanks of gasoline imported to the East Coast of the United States. Picture taken March 9, 2014. REUTERS/Devaan Ingraham/File Photo