Since MSDSs on products no longer used must be kept in a dead file for 30 years, I'd throw the training records in there too. If you have to be able to show employees were or weren't potentially exposed to a particular chemical 30 years ago, perhaps being able to show they were properly trained about it's use wouldn't hurt either.
Monona
In a message dated 1/3/2013 7:11:10 AM Eastern Standard Time, psonnenfeld**At_Symbol_Here**EARTHLINK.NET writes:
If the training includes waste management protocols, I'd recommend a 5-year retention period, consistent with EPA's RCRA record-retention rules.
Respectfully yours,
Paul