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• <br />ATTACHMENT A <br />• <br />NFPA® 30A - Code for Motor Fuel Dispensing Facilities and Repair <br />Garages -2008 Edition <br />3.3.17* Vapor Processing System. A system designed to capture and process vapors <br />displaced during transfer or filling operations by use of mechanical or chemical means. <br />[30, 2008] <br />A.3.3.17 Vapor Processing System. Examples are systems using blower -assist for <br />capturing vapors and refrigeration, absorption, and combustion systems for processing <br />vapors. <br />3.3.18* Vapor Recovery System. A system designed to capture and retain, without <br />processing, vapors displaced during transfer or filling operations. <br />A.3.3.18 Vapor Recovery System. Examples are balanced -pressure vapor displacement <br />systems and vacuum -assist systems without vapor processing. <br />Chapter 10 Vapor Processing and Vapor Recovery Systems for Liquid Motor Fuels <br />10.1 Vapor Processing Systems. <br />10.1.1 Vapor processing system components, including hose nozzle valves, blowers, <br />vacuum pumps, flame arresters, or systems for preventing flame propagation, controls, <br />and vapor processing equipment shall be individually listed for their intended use. <br />10.1.2 Dispensing devices used with a vapor processing system shall be listed. Existing <br />listed or labeled dispensing devices shall be permitted to be modified for use with vapor <br />processing systems provided they are "Listed by Report" as specified in 6.3.2.1. <br />10. 1.3 Means shall be provided in the vapor return path from each dispensing outlet to <br />prevent the discharge of vapors when the hose nozzle valve is in its normal <br />nondispensing position. <br />10.1.4 Vapor processing systems that employ blower -assist shall not be used unless the <br />system is designed to prevent flame propagation through system piping, processing <br />equipment, and tanks. <br />10.1.5 If a component is likely to contain an ignitable vapor—air mixture under operating <br />conditions and can fail in a manner to ignite the mixture, it shall be designed to withstand <br />an internal explosion without failure to the outside. <br />