On Jan 28, 2021, at 4:44 PM, Alan Hall <oldeddoc**At_Symbol_Here**GMAIL.COM> wrote:

Et al,

N2 is a simple asphyxiant, displacing oxygen from the breathing atmosphere until it is insufficient to sustain life.

What ameorfatoration might be possible?  The lieky 10 minutes to evacuate might be obtaqned with the old Air Force 10-minute O2 bottle, but would not be very cost effective and unlikely to be supplies to workers nor would the required training likely be done.

  There should be some efficacious engineering controls supplying if nothing else, fresh air ingress, exhaust ventilation, and perhaps the kind of smoke masks with ambient air the Air Force used to have for transport pilots (worn one myself)..

Might not be cost effective, but what's a human life worth?  Especially if it's yours.

Engineering controls would be the best answer, and a rapid escape route to fresh air with appropriate training might be an effective administrative control.

 trained rescuers with appropriate PPE (supplied air  level Bor with SCBA woulld seem reasonable)..  Still not better than prevention.  If it doesn't happen, nobody needs to respond to it.

Tchey response is necessary.prior coordination with local HAZMAT responder would be highly advisable.

and 

These are some suggeions only..

PREVENTION IS ALWATS YBETTER THAN RESPONSE!

Alan

Alan H. Hall, M.D.

Medical Toxicologist

Major, USAFR, MC, FS (Hon. Ret.)

On Thu, Jan 28, 2021 at 5:21 PM Reinhardt, Peter <peter.reinhardt**At_Symbol_Here**yale.edu> wrote:

How much does an oxygen sensor/alarm cost? -- Pete

 

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