Are post-removal investigations necessary to determine if the removal was protective?
If the action(s) were planned integrating ecologically-based clean-up levels and it can be demonstrated that the action achieved those levels, post-removal investigations are not likely to be necessary. If waste is left in place, a monitoring program is typically necessary. In cases where the action(s) have been performed to stabilize a site, but the resultant conditions were not planned to address all risk issues, a site investigation may be necessary to recharacterize the site.
