Well, the member has touched on an excellent point, Mr. Chair, and my colleagues from the Auditor General may want to weigh in on this.
Number one, the way we classify sites is not random. We look at the sites where we suspect there might be significant contamination or environmental risk. The big ones are assessed first. What's left is those we're less worried about. Understand that there is a hierarchy there. You can't just take the numbers we have so far and extrapolate them over the unassessed sites.
That being said, of the sites that are left, 6,600 or so, if they haven't been assessed, we have not booked anything for them.
One of the interesting questions around the new contaminated site standard is that it forces you to extrapolate more than we have in the past. If you have two sites that are identical or similar and you know what one costs, you should estimate the other one based on that. That's the discussion we've had with the Auditor General going forward: how much do we have to extrapolate? If we haven't actually assessed a site yet, there's really not much we can do there.
The other bit I should say in terms of the sites that are coming is that there's a program called the federal contaminated site action plan. I would commend to you to read about it, because it describes high-priority, low-priority, zero-priority sites as well as the unassessed to get a sense of what's coming. There's actually a database on contaminated sites of the government, so you can see what's out there.
There was money in the last budget to continue to clean up existing sites, but equally important, to continue to assess the ones we haven't yet gotten to.
As a final point, Mr. Chair, the parliamentary budget officer did some work around what the total package is here. The estimation that was done wouldn't meet accounting standards in terms of booking a liability, but it's interesting information to read so that you have a sense of what else is out there.
My colleague has just flagged to me that I should mention I can't talk about contaminated sites without talking about AECL. Atomic Energy is a big part of this as well.