Many federal cleanup sites (and a large number of state cleanup sites) have publicly available administrative records. Depending on the agency involved, this may include just the legal records and the major reports used to document completion of the cleanup, or may include just about every piece of correspondence written along the way.
I've reviewed my fair share of administrative records. Most of the time, I can get what I need online and don't need to trek to a records facility or local library.
I was reviewing one administrative record online, however, and apparently some additional documents got shuffled in accidentally. The EPA technical lead's performance review (for his annual review for his job) was attached to the end of a very long, very dry technical report.
I'm happy to report that Mr. EPA technical lead was considered to be generally competent, and his peer reviewers had only positive things to say. That's nice, since his review is permanently enshrined online.