Thank you to our witnesses today. This has been very helpful for us going forward.
Mr. Blais, I was very interested in what you brought forward to us today. As you say, it's different from anything we've had come to us so far.
At the end of your presentation, you talked about the legacy contaminants declining over 90%. Can you talk to that a bit? I don't know whether in any of your research you've been able to determine the reasoning for this. Has it happened through a lot of the work done through—