CONVAULT 500 Gallon Above Ground Fuel Tank, 500 Gallon ConVault above-ground liquid fuel storage container, for fuel/lube dispensing, patented 3-layer system…inner steel tank, secondary containment, and a concrete outer vault, UL listed, seamless, and reinforced. Unit is fire-safe, impact resistant, and EPA compliant. Perfect for oil or chemical storage, ideal for fleet/yard operations. Call USA Trans Equipment for more info. We Export Worldwide.