Which method is NOT typically used for confining liquid hazardous materials?

Dilution is not typically used for confining liquid hazardous materials because it involves mixing the hazardous substance with water or another liquid to reduce its concentration. While dilution can be a technique used in some spill responses to manage the effects of a hazardous material, it does not effectively contain or confine the substance. Instead, dilution may spread the contamination over a larger area, potentially increasing the risk to the environment and public health.

On the other hand, methods like diking, damming, and covering are specifically designed to contain spills. Diking involves creating barriers around a hazardous material to prevent it from spreading, while damming redirects the flow of the material to limit its movement. Covering involves using materials to create a barrier over the spilled liquid, which can help contain it and prevent evaporation or further spread. These methods focus on the immediate containment and management of hazardous materials, which is crucial in spill response scenarios.