The Right Way
Trained workers properly clothed and masked. Engineering controls correctly set up and working. Ducting well sealed. Electrical wiring for machinery and lights correctly installed.
The Wrong Way
No containment or engineering controls (the carpet is not even covered). No worker training, no containment, no engineering controls, no worker safety clothing or mask with a worker spraying an unknown chemical after a very poor white paint encapsulation attempt. And the source of the water that caused the mold (below grade perimeter wall not sealed well) has not been fixed.