Deep maintenance Z level

[Decarcassor]

Its an interesting idea but what would be the purpose of this deep maintenance other than being a sneaky way to get trough the station ? What is it used for in terms of regular station operation ?

I can think of a few things like a toxic dump where all the chems flushed by station machinery end up. Some kind of waste filtering and recycling place for the station water. Maybe a stinky compost silo. Stuff like this ? Places you don't want to go most of the times but might on occasion need some unclogging or purging.