Hall Tank Company manufactures and sells the finest steel storage tanks, all made to the highest quality standards that are legendary in the industry.  We are proud to maintain a 100% STI rating. The fact is, we can make just about any steel storage tank to the strictest quality standards, such as: ACT-100® Single and Double Wall Underground Tanks and Plasteel® Single and Double Wall Underground Tanks and we are one of the only steel storage tank manufactures that has a approved underground DEF storage tank.