Damming is defined as which action?

• A. Actions to contain a liquid in an area for absorption
• B. Actions to prevent or limit the flow of liquid past a certain area
• C. Actions using raised embankments or barriers
• D. Actions to direct and control movement to a less harmful area

Answer: (B)

Damming is about creating barriers to stop or slow the flow of a liquid so it does not pass a specified boundary. In hazmat control, you set up dikes, berms, or other barriers to hold back the spilled liquid, keeping it from reaching drains, waterways, or exposed areas. This focuses on preventing movement of the liquid rather than absorbing it or redirecting it somewhere else.

Absorbing the liquid with materials is not damming; that action aims to remove the liquid after it’s contained. Using raised embankments or barriers describes one way to achieve damming, but the definition centers on preventing or limiting the flow itself, not just the method. Redirecting movement to a less harmful area is a different tactic (containing and routing hazards), not damming.