Thank you for the question.
The quality of the science and information we have certainly evolves. There are circumstances where a site managed and treated in one fashion has proved to be inadequate in the long term. One situation where that is occurring these days is in relation to climate change. Certain types of risk mitigation measures put in place, such as capping or relying on the permafrost layer to keep contaminants in place, are changing in ways that we couldn't have predicted a few decades ago.
I think the short answer is, yes, and if you have any questions, I would have a site-specific example.