A fully loaded propane trailer overturned in a parking area for servicing of truck tractors. The tanker pushed trhough soft pavement and tipped over on its running gear, The tanker began to leak and a process to offload and upright the tanker took approximately 6 1/2 hours. The Team stood by and monitored the leaking propane from topside relief valves until the load and pressure could be reduced. Multiple aerial devices tankers and engines stood by to ensure safe cribbing and uprighting of the tanker was performed by the wrecking company.