Understanding of course that you are in a drastic situation - and ANYTHING might presently appear a better situation than not having a ROOF - dude; you are about to take on a task WAY OVER YOUR HEAD here...
Without getting into details and specifics - normally - when a team goes into a BIO HAZARD ZONE - which this might actually be; pending how long the lab was active - they are GEARED UP - COMPLETE HAZ MAT SUITS et al...
Without a PHD or at least a damn tight course in a subject like this - my suggestion would be re-hinking this work / living option.
Many times - these types of units are simply condemed and destroyed...
WHY?
BECAUSE THEY CANNOT be decon'd.
Just sayin