A chemical is added to a big Q-tip that is used to swabbed the floor. This can be done before or after. An area one square foot is swabbed.
The swabs are cultured in a lab for 24 hours. Then your samples are read by a microbiologist, who sends us a lab report of the findings. At that point, we can tell you whether your area is ready or not for re-occupancy.
Do not enter the area before you have received the lab results.