One common odorant is ethyl mercaptan, CASNo. Odorant has a foul, skunk-like odor. The odorant is effective in mostinstances, but not everyone can smell the odor. The ability of people to detect odorsvaries widely. Also, certain chemical reactions with material in the propane system canreduce the propane odor level.
Ifodor level appears to be weak, notify propane supplier immediately.
Notify fire department. Allow only trained,properly protected Personnel in area. Shut off source of gas, if possible. Allow fire toburn itself out after gas flow is shut off. If gas flow cannot be shut off, do notextinguish fire.