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*Underground Piping <br />April <br />Envi.toflexO Retractable Underground <br />Fuel Primary <br />PipingSystem Specifications <br />The underground fuel system shall be comprised of components of an <br />integrated design which shall afford the greatest degree of performance <br />without environmental contamination in. the event of. ground movement, frost <br />heave, seismic activity, or other normal geophysical situations. <br />Primary Piping <br />The primary piping shall be continuous and have no buried or inaccessible <br />connections or joints. All primary piping connections shall either be above <br />grade or accessible inside subsurface chambers. <br />The primary piping shall: <br />1. Meet -the minimum standards of Underwriters laboratories Inc.® "QXLT <br />Nonmetallic Piping, Flammable Liquid, Underground" testing and be so <br />listed, and Underwriters' Laboratories of Canada, "Nonmetallic Piping, <br />Flammable Liquid, Underground pipe intended for the underground transfer <br />of petroleum products at temperatures between -40C and 49C when installed" <br />testing and be so listed. <br />2. Be flexible and capable of a minimum bend radius of 6 inches without <br />kinking, cracking or breaking. <br />3. Have a minimum burst strength rated at 5 times the anticipated working <br />pressure developed by the specified pressure pump. <br />4. Have sufficient internal hoop strength so as to not collapse under the <br />anticipated vacuum produce by the specified suction pump. <br />5. Have metal swivel fittings affixed to the ends in the same machine crimped <br />manner as when piping was tested by UL&ULC. <br />TOT ..... . <br />CONTAINMENT <br />PSP400.06 (1 of 5) <br />