Under-dispenser containment is required for which type of underground storage tank systems?

Under-dispenser containment is a regulatory requirement designed to prevent any potential spills or leaks of hazardous substances that could occur during the dispensing process from underground storage tanks (USTs). This requirement is applicable to all underground storage tank systems, regardless of whether they are single-walled or dual-walled.

Single-walled tanks pose a higher risk since they lack an additional layer of protection. However, even dual-walled systems, which provide enhanced safety features with an inner and outer layer, still require under-dispenser containment to ensure that any accidental leaks or spills are managed effectively.

Moreover, the requirement is not limited to just hazardous material tanks. Even non-hazardous material tanks may be subject to these regulations to ensure that any potential environmental impacts are mitigated. Therefore, under-dispenser containment is essential for maintaining safety and compliance across the board for all UST systems. This comprehensive approach helps protect both the environment and public health from any potential hazards associated with flammable or toxic materials stored in these tanks.