As I said, the amount we have to pay relates to land that did not belong to us. We therefore consider that it isn't our responsibility to assume the costs of that decontamination. If the 5,000 housing units are to be built, that new section of land will need to be decontaminated.
I would point out that, of everything I've mentioned, the areas on which construction is possible represent roughly 3% of the territory. If we make a simple proportional estimate of the effort required by national defence to decontaminate the site, which falls under its responsibility, it becomes clear that it might take one year, rather than 30, to decontaminate the sections needed for the development.