Crews are assessing the waters off San Juan Island in the Salish Sea near Vancouver Island after a fishing boat sank and leaked fuel on Saturday. The Aleutian Isle had nearly 9,840 litres of oil and diesel on board when it went down off the west coast of San Juan Island in Washington state. Gerald Graham, a Victoria-based consultant who specializes in marine oil spill response and prevention, said the diesel fuel flowing from the boat is very light, which means crews can't use booms or skimmers to clean it up.