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Guide Specifications - Xerxes® Fiberglass Underground Storage Tanks Short form: The contractor shall provide a single-wall, double-wall or triple-wall fiberglass reinforced plastic (FRP) Underwriters Laboratories-labeled un- derground storage tank as shown on the drawings. The tank size, fit- tings and accessories shall be as shown on the drawings. The fiberglass tank shall be manufactured by Xerxes® Corporation. The tank shall be tested and installed according to the Xerxes Installa- tion Manual and Operating Guidelines for Fiberglass Underground Storage Tanks in effect at time of installation. Long form: Part I: General 1.01 Quality Assurance A. Acceptable Manufacturer: Xerxes Corporation B. Governing Standards, as applicable: 1. Underwriters Laboratories (UL) Standard for Safety 1316 for storage of flammable liquids. A UL label shall be attached to each tank. 2. National Fire Protection Association (NFPA) Standards: NFPA 30: Flammable and Combustible Liquids Code NFPA 30A: Automotive and Marine Service Station Code NFPA 31: Installation of Oil-Burning Equipment. 3. City of New York Department of Buildings M.E.A., Division #161-89-M. Part II: Products 2.01 Single-wall, Double-Wall and Triple-Wall Fiberglass Reinforced Plastic (FRP) Underground Storage Tanks: A. Loading Conditions - Tank shall meet these design criteria: 1. Internal Load - Single-wall, double-wall and triple-wall tank shall withstand a 5-psig air-pressure test with 5:1 safety factor. Contractor shall individually test tanks for leakage prior to in- stallation. Maximum test pressure is 5 psig (3 psig for a 12'-di- ameter tank). 2. Vacuum Test - To verify structural integrity, every standard 10'- diameter tank and smaller shall be vacuum-tested by the manu- facturer at the factory to 11.5" of mercury. All 12'-diameter tanks shall be tested by the manufacturer to 5.5" of mercury. 3. Surface Loads-Tank shall withstand surface H-20 axle loads when properly installed according to Xerxes' current Installation Manual and Operating Guidelines. 4. External Hydrostatic Pressure - Tank shall be capable of being buried in ground with 7' of overburden over the top of the tank, the hole fully flooded and a safety factor of 5:1 against general buckling. 5. Tank shall support accessory equipment - such as heating coils, drop tubes, submersible pumps and ladders - when properly in- stalled. B. Product Storage: 1. Tank shall be capable of storing petroleum products with spe- cific gravity up to 1.1. 2. Tank shall be vented to atmospheric pressure. 3. Tank shall be capable of storing products identified in the man- ufacturer's current standard limited warranty. C. Materials: 1. Tank shall be manufactured with 100% resin and glass-fiber re- inforcement. No sand fillers. D. Tank Dimensions (Refer to Xerxes literature on gallonage.): 1. Tank shall have nominal capacity of gallons. 2. Tank shall have nominal outside diameter of feet. E. Interstitial Space 1. Double-wall and triple-wall tank shall have a space between the walls to allow for the free flow and containment of leaked product from the primary tank. The space also allows the inser- tion of a monitoring device through a monitoring fitting. 2.02 Accessories A. Optional Anchor Straps 1. Straps shall be FRP anchor straps as supplied by tank manufac- turer. 2. Number and location of straps shall be specified in current liter- ature by tank manufacturer. B. Manways 1. All manways shall be flanged and 22" ID., complete with UL- listed gaskets, bolts and covers. (30" and 36"I.D. manways are also available on certain larger tanks.) 2. Location is shown on tank drawings. 3. Optional manway extensions shall be FRP and inches long. 4. All 12'-diameter tanks require at least one manway. C. Optional Fill Tubes 1. Fill tubes shall be FRP, 4" in diameter, with a 6" x 4" double- tapped reducer bushing, and include a 6" NPT fitting. Tubes shall terminate a minimum of 4" from the bottom of tank (a minimum of 6" for a 12'-diameter tank). D. Striker Plates 1. Striker plates shall be installed under each service fitting and manway opening. E. Optional Heating Coils 1. Optional heating coils shall be installed in a separate 22"-diam- eter manway and shall be as supplied by tank manufacturer. F. Optional Ladders 1. Ladders shall be the standard ladder as supplied by tank manu- facturer (aluminum, carbon steel or fiberglass). G. NPT Threaded Fittings 1. All NPT threaded fittings shall be a material of construction con- sistent with the requirements of the UL label. 2. All standard threaded fittings shall be half-couplings and shall be 4" or 6" in diameter. Reducers are to be used for smaller sizes where shown and provided by contractor. 3. Strength - NPT fittings shall withstand a minimum of 150 foot- pounds of torque and 1,000 foot-pounds of bending, both with a2:1 safety factor. H. Monitor Fittings 1. The monitor fitting for a double-wall and triple-wall tank shall consist of a 4" NPT fitting on the tank. 2.03 Optional Monitoring System A. General 1. The tank manufacturer shall offer the option of a continuously monitored, hydrostatic leak-detection system for its double- and triple-wall tanks. 2. The monitoring system shall be designed by the manufacturer to detect a leak in either the primary, secondary or tertiary tank, at installations with or without groundwater. 3. The monitoring system shall include monitoring fluid in the pri- mary interstice delivered to the installation site. The contractor shall be responsible for field installation of monitoring fluid in the secondary interstice. 4. The reservoir(s) shall be fitted with one 4" NPT fitting for instal- lation of an electronic, reservoir-level sensor. Part III: Testing and Installation 3.01 Testing A. Testing - Tank shall be tested according to the applicable Xerxes Installation Manual and Operating Guidelines in effect at time of installation. 3.02 Installation A. Installation - Tank shall be installed according to the applicable Xerxes Installation Manual and Operating Guidelines in effect at time of installation. Part IV: Limited Warranty 4.01 Limited Warranty A. Limited Warranty - Warranty shall be manufacturer's standard lim- ited warranty in effect at time of purchase. 8