Indexing+OCR+RegEx will expose 3786 unique email addresses.
This data is mostly unclassified junk. There is one classified document from 2013, which is probably unclassified by now.
On a sidenote. My passion is digital forensics and making sense of piles of unstructured data. Feel free to contact me if you need your data analyzed. No leaks, no slips, your info will be safe with me.