Concrete tanks usually only last 20-25years or less depending on surrounding soil conditions.

If you are considering switching to a different heating system you will need to remove the tank and clean any contaminated soil.

I'm a lender and make no money if loans don't close, but building a house on a foundation of sand is really a bad idea. 

Yep, and have them shoot the grade at about 1/4-1/2" a foot if possible so water doesn't run too fast washing out, use larger rock in base and fill cracks with smaller gravel....it's what we do around here....if you're guy doesn't know what he's doing, get someone who does for your terrain and soil type.

That money will slip through you fingers like sand.  I

Once it is attached, they can jack up the footing if needed.This is all based on the type of soils but usually helical's can be used in majority of soils unless the house was build on limestone or a giant rock.

Hey all, Have a problem tenant who caused ~$2000 in damages and some unpaid utilities... let her dog soil the carpet and refused to pay water bill last few months. 

Sandy, I'm wondering what your position is with regard to the documents you mentioned.

They are caused by settling soil.

Is it because the structural members are warped and it can't "get" level, or is it because the house is sitting on expansive soils and it won't "stay" level?