Section 658-205-3 - INSTALLATION OF SELF-SERVICE DISPENSING STATIONS1. All installations of self-service dispensers at dispensing stations must comply with the following: A. Operating instructions must be conspicuously posted in the dispensing area.B. The dispensing area must be in clear view of the operator on duty at all times.C. The operator must be able to communicate with persons in the dispensing area at all times.D. Warning signs incorporating the following or equivalent wording must be conspicuously posted in the dispensing area: (1) "The filling of portable propane and natural gas containers is prohibited;"(3) "Stop Motor and Extinguish All Pilots - Extinguish all pilots and gas ignition systems. All appliances must be in the "off" position;" and(4) "Remove All Occupants from Vehicles Containing Propane Appliances." E The dispensing station must have an emergency breakaway device under the dispensing unit that will retain the product on both sides of the breakaway point or other devices affording the equivalent protection. F The dispensing station must have a thermally activated shut off. G Dispensing devices for compressed natural gas, liquefied natural gas, and liquefied petroleum gas must be listed. H Listed hose assemblies must be used to dispense fuel. Hose length at automotive service stations must not exceed 18 feet (5.5 meters). I Dispenser Installations Beneath Canopies. Where compressed natural gas or liquefied natural gas dispensers are installed beneath a canopy or enclosure, the following must apply: (1) The canopy or enclosure must be designed to prevent accumulation or entrapment of ignitable vapors; and(2) All electrical equipment installed beneath the canopy or enclosure must be suitable for Class I, Division 2 hazardous (classified) locations. J. Dispensing devices for liquefied petroleum gas must meet all applicable requirements of NFPA 58, Liquefied Petroleum Gas Code, and must incorporate a dispensing nozzle that releases not more than 6 cubic centimeters of liquid Liquefied Petroleum Gas upon disconnection.K. Dispensing devices for liquefied petroleum gas must be located not less than 5 feet from any dispensing device for Class I liquids.02-658 C.M.R. ch. 205, § 3