Secondary containment systems are designed to prevent the release of hazardous materials into the environment. They consist of structures or devices that can catch leaks or spills from primary containers, such as tanks or drums. This helps protect soil, water, and air from contamination. These systems are commonly used in industries that handle chemicals, petroleum products, and other potentially harmful substances. Examples include double-walled tanks and spill pallets. By providing an extra layer of protection, secondary containment systems play a crucial role in environmental safety and regulatory compliance.