There is a strong smell of rotten eggs coming from the cooking area, and I suspect I have a propane leak, the house has an external propane tank. We have evacuated the house and turned off the pilot lamps and turned off all electricity to the house. The propane supplier will come tomorrow to inspect the leak. I have never had this problem before, do you think the leak is from the appliance? or are there other common causes of leak like busted lines etc? Any idea how much it is going to cost us to fix it ? I dont want to get ripped off my the propane supplier guy.