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Date: Sat, 19 Feb 2000 21:48:17 -0600
To: techdiver@aq*.co*, cavers@cavers.com
From: Scott Hunsucker <swhac@pc*.gu*.ne*>
Subject: Re: CNS Toxicity

    The main problem lies in the narcosis hazard, which is a separate 
subject, but fits in here.  If you are using mix, then why not get all of 
the advantages of it.
    If you are going to use trimix, then use the He and get better EADs.  A 
couple of years ago there was some talk of 17/17 to 230+, it is a reference 
to that.  There are many people that run EAD in the 130-180 range, why?  If 
the head is clearer at 100 or shallower, why not use it?  The weak trimix 
comment refers to this.
    After I read the post again, I can see where the confusion would come in.
Scott



>Are you saying EAD's greater than 100' are an O2 toxicity hazard?
>Or a narcosis hazard? or both?

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