By the time she gets there, it's definitely gassed off. But there does seem to be evidence that something was moved there in the dead of night at some point. Nothing that can be followed, but it does seem to suggest that this is where they got those gas cans into the city, whoever it was.

None of the workers saw anything though. No ships, at least. Some say the currents have felt weird lately, though. Almost as if something big was moving around deeper in the water.