What does Secondary Containment protect against?

• A. Reducing evaporation
• B. Containing a leak from the primary tank or line
• C. Improving aesthetics
• D. Preventing theft

Answer: (B)

Secondary containment is a protective barrier around a storage vessel or pipeline that catches liquids if the primary container leaks. Its purpose is to keep spills from reaching soil, groundwater, or surface water, keeping the environment safe and making it easier to detect and clean up spills. This function directly matches the idea of containing a leak from the primary tank or line. The other options don’t fit because evaporation control, aesthetics, and security against theft are not what secondary containment is designed to address. Typical forms include dikes, double-walled tanks, or lined basins that hold leaked contents long enough for prompt cleanup.