TANCO Engineering specializes in new above ground tank construction designed to AWWA, API 650, API 620, UL, and other applica ... ble construction codes and Tank Repairs/Modifications per API 653. We provide technical service, shop fabrication, new above ground tank storage construction, tank maintenance, tank repairs, aluminum geodesic dome roof design and construction, aluminum floating roof installation, and floating roof seal systems. Since its founding in 1979, TANCO has strived to continuously excel in the areas of health and safety performance, work quality, environmental stewardship, and customer service. We have earned our top-tier industry reputation by consistently delivering results. read more