So long as you have a lease & it's a simple non payment of rent issue it's pretty cut & dry.

Otherwise it is in the soil below the slab.

YES, it is a known factor throughout pockets of Texas to have expansive soils. 

If you want to live like a slob but its not physically harming my property, then it is what it is....If you have so much stuff that its damaging my investment, then you either change that and pay for the damage repair NOW (not at move out) or I evict you.So if the "clutter" is attracting rodents, insects.... resulting in water damage, mildew, dry rot or other physical damage to the building above reasonable "wear and tear", I don't care if you pay on time..... you fix it or you go.

Obviously I got some dry wall damage, some bubbling, cracks, and discoloring.  

I see a lot of structural problems due to our expansive soils and poor drainage. 

He showed me through a camera inside the heat exchanger what looked to me like cracked dry clay.

I'm risking sounding like a danged fool here but I have a problem that honestly I should've solved 20 years ago. We keep calcium chloride and sand/salt in 5 gallon pails at all our buildings. We keep them in entry way...

People that have service businesses; restaurants, car washes, dry cleaners, IT companies, contractors, health care practices, real estate brokerages, real estate developers, law firms, etc.

But I dont do it immediately, I let the intended coat dry a little then I smooth it over.