What would you do if your well went bad and the groundwater became contaminated?

Asbestos, radon gas, oil, run off contaminants, pollution in water, etc.

I crunched the numbers again and it seems like a good deal for rehab and rental ONLY if someone remove the tank and clean up the contamination.   

I have made money on 2 foot strips along someones property.I have purchased environmentally contaminated parcels and made millions oh a $500 investment.

The paperwork has to report any contamination if any.

Or worse, doesn't burn down the building and just leaves it with meth contamination, costing OP many thousands of dollars to remediate? 

The stuff gets into the paint and everything else and contaminates the entire environment.

All carpets are contaminated and they need to be changed and condo painted While all the work is done I should put her up at my costs in a hotel somewhere .At the end of all this he says it's just cheaper to buy them out .

The well could run dry (rare in my area) or the pump could fail. ...There is at least one more thing: groundwater contamination.

I wonder if a second eviction process can be avoided as the house is contaminated.