Used 15,000 Gal William Grant Carbon Steel Tank. Design specific gravity of .662. Flat bottom and cone top. Supported by bottom head. Aluminum Pontoon Floating Roof. 12'0" ID x 18'0" T/T. Estimated weight 11,555 lbs. API-650 coded. Last used to store Naptha. S/N # 1640. Built 2015.