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Double Wall Fiberglas Tanks for Fuel Storage Model DWT-2P and DWT-4 Specification Short Form: 7.General Services Administration,Public Building Service Guide The contractor shall provide double-wall Fiberglas underground storage Specification,PBS:1568. tanks U.L.labeled for petroleum products in sizes and with fittings as 1.03 Submittals: shown on the drawings.The tanks shall be manufactured by Owens- a.Shop Drawings:Contractors shall submit copiesof shop drawings Corning Fiberglas. for each tank.Drawings shall include all critical dimensions and Tanks shall be tested and installed with pea gravel or approved alternate show locations of all fittings and accessories,i.e.,manways, backfill material according to the current installation instructions(Owens. ladders,hold-down straps,heating coils,etc.Materials of Corning Fiberglas publication 3-PE-6304 and 3-PE-12681)provided with construction shall be in accordance with Section 1.02 of this the tank. specification. b.Catalog Data:Contractor shall submit copies of manufacturer's Long Form: Section 13410 literature. GUIDE SPECIFICATION c.Certification Plate:U.L.labels for petroleum products shall be OWENS-CORNING FIBERGLAS affixed to each tank. DOUBLE-WALL REINFORCED d.Installation Instruction$:Contractors shall submit POLYESTER UNDERGROUND copies of manufacturer's latest installation instructions. STORAGETANKS e.Calibration Charts:Contractors shall submit copies of manufacturer's latest calibration charts. Part I General Part II Products 1.01 Related Work Specified In Other Sections 2.01 Double-Wall Fiberglas Underground Storage Tanks. A.Cast-in-Place Concrete:Section 03300 A.Loading Conditions—Tank shall meet the following design criteria: B.Anchor Bolts:Section 05501 1.External hydrostatic pressure.Buried in ground with 7'of overburden over the top of the tank,the hole fully flooded and a safety factor of 5:1 C.Plastic Pipe:Section 15064 against general buckling. D.Liquid Level Gauges:Section 15174 2.Surface loads:When installed accordingto manufacturer's installation E.Other Related Work—such as Excavation and Boiler Equipment instructions tanks will withstand surface H-20 axle loads(32,000 lbs./axle). 3.Internal load:Primary tank and annular space shall withstand 1.02 Quality Assurance pressure test of 5 psi on tanks of 4'through 10'diameters.Resulting in A.Acceptable Manufacturers:Owens-Corning Fiberglas Corp, a 5 to l safety factor. Toledo,Ohio 4.Tanks shall be designed to support accessory equipment such as B.Governing Standards: heating coils,ladders,drop tubes,etc.when installed according to 1.ASTM Specification D4021-81.Glass Fiber Reinforced manufacturer's recommendations and limitations. Polyester Underground Petroleum Storage Tanks. B.Product Storage Requirements: 2.U.L.1316.Underwriters Laboratories,Inc.,Glass Fiber 1.All primary tanks must be vented.Tanks are designed for operation Reinforced Plastic Underground Storage Tanks for Petroleum at atmospheric pressure only,except for use with vapor recovery Products. systems at a pressure or vacuum of approximately l psi. 3.National Fire Protection Assoc.(N FPA 30)Flammable and 2.Tanks shall be capable of storing liquids with specific gravity up to 1.1. Combustible Liquids Code ano(NFPA 31)Standards for Installation of 3.Maximum temperature.Tanks shall be capable of storing gasoline, Oil Burning Equipment. gasohol(90%gasoline and 10%ethanol mixture),Oxinol-50® 4.Factory Mutual File J.I.OK6AF.A5 (90.5%gasoline,4.75%methanol,4,75%GTBA),AV gas,jet fuel, 5.National Sanitation Foundation Testi ng Laboratory,January 1984, diesel fuel or potable water at ambient underground temperatures,or Standard 15.Plastic Piping System Components And Related Materials, fuel oil at temperatures not to exceed 150 F at the tank interior Stnsurface. Sta 6.Military Specification MIL-T-52777A,dated July 6,1978,Tanks, 4.Tanks shall be chemically inert to petroleum products. Storage,Underground,Glass Fiber Reinforced Plastic.