If the well is drilled and constructed correctly. Being pressure cemented from the bottom of the casing to the top.
With top ten feet filled with cement or grout, and a two by two concrete slab around the top of the well head.
BUT, that is going to come down to the well driller you find.
There are some that have no idea on how to complete a well.
Ask around, call the local county permitting office, and well supply houses, for a reputable well driller.
If you get a good well guy, you should be ok.
Another factor to conceder is, is the sewer system above you constructed correctly, and put in, in accordance with the law.
Travis