The purpose of vapor suppression is to

• A. Reduce the emission of vapors
• B. Increase the rate of vaporization
• C. Enhance liquid spread
• D. Neutralize the chemical

Answer: (A)

Vapor suppression is about preventing vapors from escaping into the air by reducing evaporation from the spilled liquid. When a hazardous liquid is released, vapors form at the surface and can move with the wind, creating inhalation and exposure risks. By applying a foam blanket or other vapor-suppressing barrier on the surface, you slow or stop the molecules from escaping into the atmosphere. This keeps more of the substance contained, lowers the potential for exposure, and helps control the incident area. It’s not about speeding up the reaction or spreading the liquid, and neutralizing the chemical would be a different tactic that doesn’t directly address vapor release.