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> From:          Kevin Connell <kevin@nw*.co*>

> Ted - What is the liability in topping of a trimix?  Is someone going to
> accidentally grab my 100lb set of twins and accidentally dive them too
> deep?  Will the lower percentage of oxygen cause your compressor to go
> hypoxic, or will the fact the pure O2 came within 1/2 mile of the tanks
> cause the entire 
> establishment to go up in flames??
> 

    Kevin,
          The liability comes in to play when people ( certainly not 
you ) who do this type of gas blending are to cheap to buy the Oxygen 
analyser and never analyse the mix before diving it. Sooner or later 
they make a mistake, too much Oxygen, and then a next of kin is trying to 
sue the store that air topped the tanks that killed the diver. Kevin 
before you try and tell me that all these "garage mix wizards" have 
Oxygen analysers, remember these are the same people who will not pay the 
extra $2 per cylinder for medical grade Oxygen and use ballon grade 
Helium instead of 99.97%. Face the facts. Most of these people are to 
cheap to buy the mixes and figure they can do it cheaper themselfs. 
These people have a copy of gas mixing tables, a bottle of Helium,  a 
bottle of Oxygen, and a $10 pressure gauge. To them, an Oxygen 
analyser is a $150 to $300 waste of money. They will tell you," I 
know how to read the table and the pressure gauge, and besides I 
don't make mistakes."
    If you believe that a dive store couldn't be sued by the next of 
kin over a bad mix that the store air topped, then I have a ship 
wreck that I would like to sell you!

             Ted


Ted Green (owner)                
Tidewater Aquatics (Dive Store)  
Salisbury Maryland USA
TDI IT #029
SSI MI #178

The world contains but three types of people:
            1. Those who make things happen.
            2. Those who watch things happen.
            3. Those who wonder what happened.
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