The area that they had holed yup was actually a fish packaging factory or plant, honestly Cole could not really tell why such a building would be within such a massive indoor city. He'd at least expect that such a building would have been placed outside where the smell would not have been a bother to society.
But instead the place was an absolute fortress with massive steel and pure concrete walls. It was built in such a way to keep the smell contained as it is transported via massive waste chutes big enough to have massive trucks drive through. It was a fortified location that gave them access to this particular floor, and any others. So in a manner of speaking it was a forward base for mercenaries any time they scavenged this tower.
