1. Diagnostic prerequisites

1.1 Objectives

The objectives of a diagnosis of subsoil quality, on a site to be developed or in operation, can be :

• meet a regulatory or contractual requirement;

• draw up a reference system (soil and groundwater) that can be used against third parties in the event of transfers of operation or ownership, as well as in the event of neighbor disputes;

• provide essential elements for a site rehabilitation strategy and/or the acceptance of requalification work.

Whatever the need, a subsurface diagnosis must be based on an exposure diagram incorporating the three components of a risk analysis: potential pollution sources, transfer routes, targets...