The Steel Tank Institute remains at the forefront in underground tank design with the STI-P3 Dual Wall Steel Underground Storage Tank. The Dual Wall Tank doesn't just meet federal, state, and local requirements; it surpasses them. Federal law requires that all underground tanks be structurally sound, corrosion resistant, and product compatible. Some state and local governments are beginning to require secondary containment. Fines for noncompliance are stiff; the liability for a tank leak can be sky-high. By specifying the STI-P3 Dual Wall Tank, you'll take a giant step beyond regulations.