Advance Tank has experience in retrofitting inappropriately sized foundations or installing new ring wall foundations under existing tanks. In many cases, these new foundations are being required by local, state, and federal agencies who are requiring secondary containment in all storage tanks. Advance Tank has the capability of removing an existing floor, excavating all fill material, installing a new liner, cathodic protection, new fill material, and the new tank bottom. Advance Tank has performed this service for both the federal government and private industrial customers.