Training charges is very emotive and really comes about from your business plan and reasoning for starting your business.
If the market in your area is flooded with OHS traiers and consultants, then you're not going to be able to charge heaps as clients will just shop around for the cheapest rate.
At the same time, what's industry like in your area? Again, if it's a "poor" market, you're not going to be able to charge heaps either as they simply won't buy it becuase they can't afford it.
As others have said, look at your competitors to get a feel and an idea. Don't copy them- make sure the stuff you do stands out from them.
As an idea, I charge somewhere between $1000 up to about $3000 per day, depending on the sort of training being conducted. I tend to aim for a daily average of $1500. I do discount from my set rates, particularly if the client is booking back-to-back training or is offering a long term contract.
Hope this helps...
Melbourne, Australia