I think petrol station fires are nearly always traced to static electricity, like from a woman in unnatural garments (not cotton or wool) sliding in and out of the car while refueling, then touching the nozzle.
In the early days of the KC-10A, transmitting on HF would cause the refueling boom to shake about. Turns out some bypass capacitors in the boom control computer, which was an MD-80 FGC, had some capacitors wired to couple, rather than bypass HF energy.
Everybody knows, of course, you aren't supposed to transmit on HF during refueling, which is prudent, considering the high currents involved with notch antennas, and high voltages with probe antennas.
Some people show concern about VHF, WX radar, etc., but totally forget the 500W peak DME transmissions.
GB