This is typical in a “fee simple” (You own your exterior structure and the ground beneath) townhouse ownership.

Make sure you live beneath your means in order to achieve your financial goals3.

Regular insurance coverage covers only if a sinkhole opens beneath my property and the house is basically condemned.I would like added sinkhole coverage in order to get additional sinkhole endorsement I would need to get some sinkhole inspection.

No one can come onto your land and start drilling....You are firmly protected by this with the State of Texas Landowner's Bill of Rights...but they don't have to drill on your surface to take the minerals beneath it. 

Foundations are topically beneath the level surface.  

Has the asbestos siding been shimmed in a way to create a flat substrate?

This will help protect the subfloor beneath too.

Just another reminder that the "reality" we see around us can be so completely different from what's really going on beneath the surface!

But what's going on beneath the surface is that an all-consuming fear runs through the place.Don't get sick. 

If properly installed, it will have gravel beneath it, so some water will drain into the ground before reaching the emitter.If you're worried about the emitter freezing shut, just pop the emitter part off.