Buried but not forgotten. In 1984 the U.S. Congress enacted a regulation governing metallic underground storage tanks. Among other regulatory imperatives, the regulation required existing metallic tanks to be evaluated for corrosion, the application of internal lining and cathodic protection.  New metallic UST installations require a dielectric coating on the exterior of the tank, sometimes in combination with cathodic protection and regular maintenance to evaluate the effectiveness of the corrosion control system. The CPM leadership team has assisted the petroleum industry in developing systems that could be used in new installations with a minimum amount of third-party assistance. We also participated in the evaluation of several thousand tank systems for the purpose of ensuring the pre-designed system was providing adequate protection.