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2208.2 Design, Installation and Testing Requirements
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Vehicle fueling hose shall be compatible with CNG and shall withstand a pressure of at least four times the service pressure. Hoses shall be of retractable design and shall be protected against physical damage. Hoses shall be tested for leaks with a noncorrosive solution or equivalent leak detection method at least annually by a certified attendant and shall be replaced if damaged. Records of required inspections and testing shall be kept in a bound log book or other approved recordkeeping, maintained on the premises for a minimum of 4 years.