David,I believe in the state of Georgia, you need to work underneath a Broker to manage real estate.

With the wood exterior underneath the foam, I don't think the stud cavity will have moisture problems?

We would like underneath the fridge looked at to make sure there is no mold after the periodic leaking from the fridge.

And in this part of the country you are vulnerable to frozen pipes by allowing too much air to circulated underneath. 

The idea came from the tenants and we supported it by providing the tilling, soil amendments, and plant starts, then we let the tenants take it from there!

We are working on contacting companies for removal as I will not purchase the house without removal or a clean bill that the soil is not contaminated. 

-Remove and clean all over‐spray, drops, runs and spills from windows, hardware, doors, floors and non-painted finished surfacesCarpet Cleaning / (Carpet Replacement - if necessary)- Pre-inspection of carpet - Pre-condition heavily soiled areas with natural citrus based cleaners.- Removes as many stains as possible and provides natural deodorization.- Soil extraction with low moisture steam- Application of fabric softener and color brighteners removes detergent residue according to manufacturers specifications, leaving fibers bright and soft with a silky feel.

The runner is probably stapled/brad nailed to the wood steps just under the rounded lip of the tread and at the bottom of each riser, if there's no padding underneath.

First off, I don't know the ins and outs of NY, but depending on the severity of the situation you may need to encapsulate some existing flaking lead, or sometimes you may need to remove soil.  

This prevents the heaving that can happen in Gilbert's soil conditions, known as expansive soil.