What is the first action that should be taken when trigger levels have been reached during a fumigation?

When trigger levels have been reached during a fumigation, the first action that should be taken is to stop work. This is critical for ensuring the safety of all personnel involved as well as surrounding individuals. Stopping work allows for an immediate assessment of the situation and helps to prevent further exposure to any harmful gases or substances involved in the fumigation process.

At this stage, it is essential to prioritize safety, which may involve implementing emergency procedures, conducting risk assessments, or seeking assistance from safety personnel. Actions like removing the air-purifying respirators (APR), taking air samples, or notifying emergency services typically follow once it has been confirmed that operations have halted and the area is safe to assess further. Stopping work provides the necessary control to manage the potentially hazardous situation appropriately.