If not, you probably want to do some soil testings just to make sure there was no leakage. 1970 is just about the time period when this was more of a problem, and I fully agree with @Philip Tretola, I would always heir on the side of caution when the risk is high and the cost is minimal comparatively.

If billed back, there is likely some leakage.

So by working cooperatively with a tax specialist and a financial planner a lot of the "financial leakage," can be recooped through debt management and tax strategy with respect to active, passive, and portfolio income.

Also has anyone had success getting the bank to allow them to remove the tank before closing [and if there is leakage walking away from the deal]? 

There was a ceiling leakage that he was supposed to fix when I hired him but a few days ago my new tenants texted me that there's a leak on the same ceiling.

The professional has likely made a lot of mistakes in their past, and learned from them (and doesn't repeat them) which saves the investor money by reducing yield leakage.

The doors below the sink are shot, the MDF panel is puffed out from water leakage. 

FYI...if your investors are investing directly with the sponsors, they will only need your (introduction) services the first time with each sponsor and you will have investor leakage in future deals, particularly with large dollar investors. 

Apparently the waterline to the ice maker is freezing up, causing leakage and he could not figure out how to stop it. 

Originally posted by @Account Closed:I would tell the tenant to go buy some Drano.Never Ever.Don't tell your tenant to put drano on there own, if they pour to much than your pipes will get A whole and make a huge leakage, you have to know how to use drano.