So depending on where in the tank the hole was, bottom would spill alot vs top where only when topped off would spill, or was it the line and every time oil ran threw it leaked everywhere.

This is a very old thread, but TValue now has an online version that works on Macs, iPads, iPhones, etc.

Physical inspections would have shown the leaks.  

As a consolation, I did call their winterizing contractor back to cancel once the deal fell through and explained what happened, and he laughed and said it didn't surprise him at all, he quoted them to fix one tiny leak in a pipe in the fall so that he could adequately air blow the lines out for winterizing, but they refused to pay him to fix it, which led to water being left in the pipes and busting several more.  

Does it have any mention of the tenant needing to immediately inform you of leaks?

I have read that this is still a hazard and soil-testing should be done because the owner does not have documentation showing the tank was properly decommissioned and no leaks were detected (soil tested and cleared of spillage).

You should save up until you have $3000-5000 to pay for unexpected expenses, like broken appliances, leaking roofs, and prolonged vancancies.  

The sad thing is that both properties that fell through, they looked fantastic on the listings and the pictures, with the second one my agent visited the property and told me everything looked great and would only need an HVAC tuneup, but then the inspection came back and everything under the sun, from severe structural issues, leaks, electrical issues, and even signs of rodent infestation, all things that you wouldn't necessarily notice unless you did a real detailed inspection and not just a cursory walk through.  

Heating oil smells , you can get a good idea just with your nose .Diesel/heating oil does have a distinctive smell, but if a leak occurred sometime in the past and there is no active leak or oil present in the tank, you may not smell anything until you disturb the contaminated soil.  

Let's explore a few ways we can push that limit a little further, but also gain some reserves for those unforeseen opportunities in life.The world we live in is a noisy and inconvenient placeFirst, we're going to make the assumption that you're working with a smartphone like Apple's iPhone, Samsung's Galaxy series or something similar.