Thank you, Mr. Chairman. Yes, it is one of the factors now whenever we look at sites or equipment and the potential for environmental liabilities. We go through a process initially for environmental site assessment, and phase one is look at the initial area and the likelihood of site contamination and begin to work on that, identify it, whether it's soil, water, air, and what could be the impact of that contamination. Then we go to phase two of an environmental site assessment where we look at and do an undertaking to provide employment or information on the nature and the extent of that, and that's looking at surface soil types, human impact as well, and then we go to phase three of an assessment where we then estimate the costs of doing remediation. Thank you.