I once found a site that had regulations of how long to keep employment applications, personel files for terms, etc...

Do those laws vary from state to state? Anyone know where I can find this info?(I'm in IL)

Some vary from state. I believe there are some requirements at the Federal level.

You can probably get some of your information here:

http://www.state.il.us/agency/idol/faq/faq.htm

That link will also tell you how to contact the state DOL, to get the rest answered.

This following link may be helpful: http://www.whad.com/labor_library/Statutory_Recordkeeping_Requirements.htm