[labnetwork] Toxic gases

[Manish Keswani]

Happy Friday everyone,

I have a question related to toxic gases in our nano fabrication center.
 
We typically shut off our toxic gases at the source when not in use, using the in line valves on the Safety Manifolds, the ESO valves, and the cylinder valve. This is to comply with the administrative control stated in our gas safety notes. The following question came up for toxic gases. I would like to understand how this is being done at other facilities and the reasoning behind it.
 
“Is there a good reason we turn off the toxic gases at the end of the day instead of just leaving them on? It seems like if there is a risk, it would be wear and tear on the valves etc, plus someone going in vault often to do it.”
 
 
Thanks in advance,
Manish Keswani
Lawrence Livermore National Laboratory
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