Approved special dispensing devices, such as but not limited to coin-operated, card-operated and remote preset types are permitted at service stations, provided that there is at least one qualified attendant on duty while the station is open to the public. The attendant's primary function shall be to supervise, observe and control the dispensing of flammable or combustible liquids while said liquids are being dispensed. It shall be the responsibility of the attendant to prevent the dispensing of Class 1 liquids into portable containers not in compliance with §
88-10 hereof, control sources of ignition and to immediately handle accidental spills and fire extinguishers if necessary. It shall be required that any attendants be familiar with and know how to operate all emergency shutdown pump controls and other emergency equipment on the site and, also, to be completely familiar with all emergency service telephone numbers in the community.