Secondary containment is required for hazardous waste under what conditions?

• A. When required by regulation or site conditions
• B. Only for solid wastes
• C. Never required for hazardous waste
• D. Only for household waste

Answer: (A)

Secondary containment is a protective measure around containers or tanks that captures leaks, spills, or precipitation so hazardous waste doesn’t reach soil, groundwater, or surface water. It’s required whenever a regulation or site conditions necessitate it, ensuring that storage areas for hazardous waste are equipped to hold the contents of the largest container (and any expected overflow) if a release occurs. This applies to hazardous wastes stored in containers or tanks, not just solids, and it is not a rule that applies to household waste. Regulations set the need for secondary containment in specific scenarios, and sites with conditions that increase spill risk (volume, weather, container type) must implement it.