You're not worried about the propane tank igniting?
Propane is actually pretty safe to deal with once you know the physics behind it. If it were possible to drop a match in liquid propane, all that would happen is the match would go out.
Tanks exploding is rare. They basically need to be put under too much pressure and burst, but the safety valve is supposed to vent the pressure and safely release the gas, which will most likely be burned off fairly safely.
Propane needs to be between 3 to 9% propane to air for it to burn, a fairly narrow margin.
If anyone has to deal with a propane tank venting, and the gas is on fire, just leave it, let it burn itself off (the flame will not be able to enter the tank, since closer to the tank there is too much propane and not enough air to ignite). Unless you can safely and permanently stop the flow of the gas... If you stop the flow and let the flame burn out, and then it starts to leak again, you will then have a mass amount of propane in the area waiting for that one single spark, and then you get your big flash.
Propane will also "cycle" in a mass relief of pressure. It will blow off so fast that the hole will ice over and plug itself, but once it's stable, that ice will melt and it will leak again and continue to the cycle over and over.
Worked for a few years installing and repairing large tanks and doing transfers of gas.