What does the term "secondary containment" refer to?

The term "secondary containment" specifically relates to systems designed to prevent hazardous materials from spilling into the environment. It typically involves structures or systems that can catch leaks or spills from primary containers, such as tanks or drums, ensuring that any hazardous substances are contained and do not contaminate soil, water, or air.

This concept is crucial in hazardous materials management because it minimizes the risk of environmental pollution and potential exposure to harmful substances. For instance, if a large tank storing chemicals develops a leak, secondary containment systems, such as berms or secondary containers, will trap the leaking material and prevent it from spreading, thereby protecting the surrounding area and ecosystems.

In contrast, other choices do not adequately represent the scope and purpose of secondary containment. Techniques for chemical recycling focus on reusing materials rather than containing them, waste disposal systems are meant for managing waste rather than preventing spills, and procedures for training firefighters do not directly relate to the containment of hazardous materials. Thus, understanding secondary containment is fundamental for maintaining environmental safety and compliance in situations involving hazardous substances.