TANK STORAGE, TRANSPORT, AND USE

Subpart 1. Precast reinforced concrete tanks. Precast reinforced concrete tanks must: A. have a method to lift the tank for an ultimate load that is four times the working load; B. undergo proper curing to achieve a compressive strength of 4,000 pounds per square inch before transport, placement, or use; and C. have no pipe penetration points or openings in the exterior walls or tank bottom below the tank liquid level, unless designed for a specific operational purpose and approved by the local unit of government. Subp. 2. Other tanks. Fiberglass-reinforced polyester or polyethylene tanks must be protected against deterioration during storage.