Nitrox fills

[jasondbaker]

It was at Tri-State Diving outside of Detroit Lakes. Gary, the owner, told me his shop was a hydro facility and that he provided training for other shop owners in the state regarding these issues. He quoted DOT, OSHA, etc requirements. He actually showed me the DOT regulation in a book but I don't remember how to find it.

The DOT regulation didn't specifically say "you cannot put air in a tank with a nitrox sticker". It was more generic --something like "the tank must be labled for the gas that you put into it".

His interpretation was that if the tank had a green nitrox sticker it must have nitrox in it or the sticker must be removed. His divers all had separate tanks for nitrox and air.

I really don't know what the right answer is. Maybe he is right and every other shop is bending the rules. Or, maybe he is taking a very strict interpretation of that regulation. I am looking for a definitive answer.