I have a pressure test scheduled for next week, so hopefully we get to the root of the issue.

if so, i would dig next to it to see how deep it is, it needs to be at least 18" to 24" deep, this is a barrier that keeps it from spreading past that. you will also just want to check for off shoots/ roots that may be going over the barrier, just trim them back. if the barrier is that deep and you keep the off shoots back you will be fine.

I have strong southern roots in Alabama, North Carolina & Virginia.

Does that really take care of the mold that attached to the flooring (due to the moisture issue after the mold crept up all the walls it flung itself onto every single thing in that house lol including the floors), or is it like mold on bread where the mold has roots and is all over inside even when the surface is sanded off?

But the problem was solved and I was able to move on with my plans for the property.See what the true root of the problem is and see if you can help fix it.

And I have roots, big roots growing into the clay pipe that will fail at some point.

you should seek a quote from at least 3 general contractors that specialize in foundations and get to the root of the cause if possible.

There are MANY things that you can do with grass roots efforts, that will pay off for you if you commit to them.Are your title companies there agent friendly? 

Up here in Dallas we didn't get much rain at all but we are rooting for Houston to recover quickly.Second, I wish we would have met before your received this property.  

I think you are trying to solution a side effect versus the root cause.