Welcome to Certified Tank & Manufacturing, LLC. We are a manufacturer of Carbon and Stainless Steel Above Ground Storage Tanks (ASTs) for a wide range of applications. In addition to petrol and diesel fuel storage tanks, we manufacture chemical storage tanks, and tanks for dry good bulk storage needs. Our main focus is above ground fuel storage tanks for the agricultural, petroleum, and environmental industries. All of our tank designs can incorporate API, UL, ULC, STI, or ASME standards depending on what the needs are. Certified Tank can build UL 142, UL 2085, UL 2080, STI Flameshield, STI Fireguard, STI GEN-TANK or ASME tanks or vessels on time and on budget. We manufacture to your specifications whether its a 10 gallon oil tank, a 60,000 gallon tank, or a 250,000 gallon above ground storage tank farm. We are located on a 15 acre facility in Springfield Illinois. Another benefit of our tank plant is that we have a fab shop that can accommodate complete custom metal fabrication work of all kinds. When quality matters, you need to get a quote from Certified or one of our distributors. Our customers get the highest quality at the best possible price every time.