Watts up Doc?
Rome wasn't built in a day, and neither can an effective safety program be. Isn't 5-7 hrs at a time a bit much? Of course the newly hired safety officers must justify their salary; maybe they'll mellow out.
We found that what worked best for us was short but often given reminders (such as a "safety tip of the day" contest, the tips submitted by field personnel in exchange for prizes like tools).
Safety glasses, hearing protection, etc. put in the boxes of all company tools that require their use...The little things, but on a continuous basis.
On the flipside, there must be penalties for safety violations, and they must be enforced.
So, watt's it gonna be, boys...the carrot or the stick?
(Bugs)