Lining a containment dike is important to protect the groundwater from contamination of the product stored in the tank. Chemicals penetrating the ground can cause long-term health concerns. Coatings protect the concrete and ground in the event of a tank spill or rupture. Coatings reduce cracking and eroding concrete. Containment areas should be inspected regularly to repairs cracks and inferior areas to ensure the dike lining is intact.