once we get base level electronics production going, we can create some industrial hydraulics and moters, build ourselves a basic drill-rig, and go and drill ourselves a bore.
But first we need that silly nano-fab going, and the bunker probably won't have ...
wait, if the scientists from the lab evacuated to the bunker, then somewhere in the bunker is probably the critical components we are missing - in the case of an evac, you would just grab the single most valuable item and run out with it ...
basic bunker exploration in 3 weeks time
this week forge tools for pipe making
next week forge pipe
following week assemble basic airflow connection to bunker.
Unfortunatally we can only provide air to 1 or 2 locations at once.
(Note: some of those corner blocks can be drilled out 3 ways to make a T junction, which will allow airflow to multiple locations)
The idea is that we won't use special breathing aparatus, but the room at the end of the pipe would have a definite air-flow through it.
We are not starting with a completely non-breathable atmosphere, just one where there is non-safe levels of CO2, and O2. By basically pushing a rooms worth of air down the pipe every hour, we can keep the air at that location fresh.
The downside of this is that you can't move around easily.
I assume we know the schematics of our own bunker.
The first target for life support will be life support itself. We'll be aiming to run external power to life support to just provide air to the needed areas, and to provide lighting where needed also. If we can do that, then we would be able to move around the bunker to do a quick inventory of what we have, and we can determine our proiorities from there.
I would like to move into the bunker (in the long run), as that is the most defensible position around here - 1 wire fence and a few rifles isn't going to do much against a serious attack, but a nuclear proof bunker, with 1 chokepoint, and doors we can seal if needed, that will keep us all alive in a true emergency.