I even cleaned the house with chemicals that I purchased from a commercial janitorial company that are supposedly used to clean bio-hazard (death sites)........still didn't do the trick.

So I want to preface this post with that fact that I am very nerdy (Chemical Engineering degree).

Sump pumps usually carry groundwater (clean) back out of the house - not dirty soapy chemical water.

Same thing with Chemical Bank up here they are slow and delay the process.

If the well is dry you are drilling deeper, if the well is not making water like it use to it could just be screen is clogged with minerals like iron or calcium and would need a chemical treatment to open the screen along.  

I'm based in Beaumont & have a similar background in engineering and work in the chemical industry as well.

Sometimes just draining the pool is enough to solve some chemical issues.

My initial thought is to clean with a mold killing chemical and then watch it.

All of the experts tell me if a house was treated with chemicals more than say 20-30 years ago it is unlikely you will ever have termites again because of the chemical that was used.I guess they are talking about Chlordane. 

Concern susceptible to harsh chemical cleaners if used by tenants.