Name two tactics to reduce vapor release from a liquid spill.

• A. Diking/damming the source and initiating rapid containment
• B. Evacuating all personnel only
• C. Ventilation only after full containment
• D. Using sandbags without containment

Answer: (A)

Reducing vapor release from a liquid spill hinges on limiting evaporation by keeping the liquid contained and away from air. Diking or damming the source creates a barrier around the spill, stopping the liquid from spreading into new areas and contacting more surface. That containment reduces the exposed surface area and the amount of liquid able to evaporate, which directly lowers vapor release. Acting quickly to establish containment stops the source and prevents continued release, further minimizing how much vapor is generated over time.

Evacuating personnel alone reduces exposure risk but doesn’t prevent or lessen the amount of vapor being produced. Ventilation can help remove vapors, but if the source isn’t contained first, it may spread vapors to more areas. Using sandbags without proper containment likewise fails to limit spread or vapor generation.