Key legal question
Whether the buyer as site owner had to bear any investigation costs under Art. 32d USG
Extracted holding
The buyer remained liable as a condition holder; it could be fully exempted only if, despite due diligence, it could not have known about the contamination.
Extracted reasoning
For industrial or commercial land, heightened diligence applies. No cadastre entry existed yet, but the buyer should have checked zoning, land register, prior use, and the obvious industrial character of the site. It therefore had to know contamination was possible.