—from the private sector, but my understanding from that is that the length of time for which we could be committed to these sites could vary from 5 years to 10 to 30 to 100 years, depending what environmental impacts are assessed around it.
What I'm asking is, when you book the cost, are you booking it based on a set amount of time, with plans to renew it and revisit it at another time? Are you booking it on what the projected total lifetime expectancy is going to be to clean up that site?