Assistant Coast Guard Commissioner Roger Girouard said on Saturday there is currently no indication of distress among marine mammals, but a number of teams are on the water monitoring the situation.
"The small number of birds impacted is an indicator of how successful we were getting the oil as fast as possible," Girouard said at a morning news conference.
An estimated 2,700 litres, or more than two tonnes, of oil was spilled on Wednesday.
Girouard said the focus now turns to what he described as the small amount of oil that managed to make it to shore
"On the shoreline, every indication we have is the soiling is in fact minor," he said. "There are a couple of spots where a one-metre globule got onto some rock, but in the main, even on the worst-impacted site in West Vancouver, thankfully the impact is relatively minor."
"That does not mean we won't address it."
Girouard said crews will work on shoreline cleanup over the next several days.