I was asked if someone could use some of my tanks the other day. My first thought was "Of course" That's the kind of person I am.
Then a wave of panic overcame me. What if they get hurt while using my tanks. Could they blame me?
So my question is what do you do if/when you let others use any of you equipment (tanks in this case). Would you make them sign a liability waiver? Would it even hold up? I know they could still come after me, just chance of success might be lower.
Has today's society just made me too paranoid. (I don't like the person I have become).
ps. The tanks have 32% EAN right now so I would require them show me their cert card.
It depends on the legal system in the part of the world you are in. Generally however, they could not hold you responsible, unless they could show that you knowingly loaned them a faulty tank, that directly caused a loss or injury.
What can go wrong with a tank? The obvious answers are: it can rupture, it can fail to deliver gas, the gas in the cylinder may be harmful.
We know compressed gas is potentially dangerous, so we ensure the cylinders are manufactured and tested to a recognised standard. Are your cylinders certified for this type of use and are they in test? If so, no problems here.
How is a cylinder going to fail to deliver gas? This is exceedingly rare; the only person I know this to happen to is when some people from my club went to Cuba. One of the divers went head down and a piece of rust lodged itself in the valve. This was shown to be a direct consequence of appalling maintenance. When it happened, he swam to his buddy and made an air-sharing ascent, exactly like how we are taught on the Open Water, or other novice course. There is no reason why anybody should drown in the event of a gas failure; we know it is a likely occurrence, so we are trained how to deal with it. If somebody is injured or killed as a result, it is the diver's fault (or possibly their buddy's). Again, if your cylinder is in test, you have done all you could reasonably can to prevent this from happening.
On the final point, you have already addressed this; you know it has nitrox in it and you have said you will check his cert. Remember, it is the diver's responsibility to verify the contents of the cylinder. If you have told him the cylinder has nitrox in it, and it is labelled, there are no issues.
The other gas issue is contamination; presumably you always take the cylinder to a reputable fill station, so there are no issues there.
Tort law varies across the globe (and in the US, state to state). Generally in the civilised world, to be liable, three elements must be proven:
- Do you owe somebody a duty of care?
- Did you fail in that duty of care?
- Did that failure result in a loss or an injury?
Unless you can answer yes to all three, there is nothing to worry about.