Is he on a salary? I personally don't consider double the normal hours reasonable overtime.....maybe I am naive. It sounds to me like a good way to have people work twice as much as you have to pay for them to be there. So he doesn't get paid overtime rates or doesn't get paid at all for anything over 7.6hours?
You say he is on more than the award, but is he on double the award? Cause in reality that's what they are getting out of him.

And it is against the law to expect anyone to work above a six hour shift without at least 30 minutes (unpaid) break. You are also entitled to 2x10 min (paid) breaks if you work over those 6 hours. I don't believe it matters what industry you are in, as far as I am aware they are standard fairwork requirements.