After a buyer's inspection (from Structure Tech, A+) we needed to find out for certain if there was a fuel tank at our potential house. Dean came out, did some stuff, and certified that there is not a tank. We were not present for the work. This was a valuable service, as the results could have 100% permanently ended the deal. When no tank was found, he did a few minutes worth of work so that this question should not come up if the house is for sale in the future. He also provided up with a signed certificate of his results, which we will be able to show any potential buyers if we eventually sell the house.