Originally Posted by labman
I didn't address some safety issues in my first post. This is ordinary fuel oil? If so, it isn't real volatile, but concentrated fumes can make a big bang. The contaminated soil will be considered hazardous waste. If you work at blowing the fumes away, you are putting unburned hydrocarbons into the air. If you have used the furnace since, the fumes would have been drawn into the furnace, and flashed back if concentrated enough. If that happened, you might not be around to post the problem. The sooner you are rid of the problem, the better. As a home owner, you can put small amounts of such stuff in the trash or just let it slowly evaporate. The odds of any real problem are slight.