(a) Areas in which flammable or combustible liquids are transferred at one time, in quantities greater than 5 gallons from one tank or container to another tank or container, shall be separated from other operations by 25-feet distance or by construction having a fire resistance of at least 1 hour. Drainage or other means shall be provided to control spills. Adequate natural or mechanical ventilation shall be provided to maintain the concentration of flammable vapor at or below 10 percent of the lower flammable limit.
(b) Transfer of Category 1, 2 or 3 flammable liquids from one container to another shall be done only when containers are electrically interconnected (bonded). Bonding or grounding of tanks, tank vehicles, tank cars, etc., shall be in accordance with NFPA 77-2007, which is incorporated herein by reference.
(c) Flammable liquids shall be drawn from or transferred into vessels, containers or portable tanks within a building or outside only through a closed piping system, from safety cans, by means of a device drawing through the top, or from a container or portable tanks by gravity or pump through an approved self-closing valve. Transferring any liquids by means of air pressure on the container or portable tanks shall be prohibited.
(d) The dispensing unit and its piping shall be protected against collision damage.
(e) Dispensing devices and nozzles for Category 1, 2 or 3 flammable liquids shall be of an approved type.