Used 30,000 Gal William Grant Carbon Steel Tank. Rated 2.5 psig @ 500 F. Wall .25" thick. Design specific gravity of .7412. Bottom and cone top. Supported by bottom head. 12'0" ID x 36'0" T/T. Estimated weight 18,000 lbs. API-650 coded. Last used to store Diesel. S/N # 1639. Built 2015.