A driver delivering LPG during the afternoon exited the cab of his tanker truck containing 12,000 litres of liquefied propane to ask for directions. The vehicle, with the engine still running and the parking brake engaged, rolled down a slope, hit a low wall and tipped over onto a garden terrace (20 m below the road level). No victims or environmental damage was reported, but a small leak on one of the hoses necessitated the intervention of a chemical emergency squad. The next morning, emergency response operations got underway, with a 150-m safety perimeter introduced due to explosion risks. A technician with the transport company pumped a portion of the total contents (2,000 litres) to another tanker truck. A flare was set up, under fire-fighter supervision, to burn the remaining propane. The tank was then made inert with nitrogen, disassembled from its chassis and recovered through use of a small crane.