Primary containment is the initial barrier directly containing a substance, while secondary containment serves as a backup in case the primary containment is breached. Primary containment serves as the first line of defense against spills, leaks, or releases, typically within a container or vessel.
Secondary containment is an additional protective measure that surrounds the primary containment system. Secondary containment systems are designed to contain any leaks, spills, or releases from the primary containment, preventing the hazardous materials from spreading and causing environmental damage. They often include features like liners, berms, or containment basins
