[labnetwork] Toxic gases

[Dennis Schweiger]

Manish,

good morning.  Here at the University of Michigan Lurie Nanofrabrication
Facility, we rarely turn our HPM gases off.  We have turned them off when
we've had service work done on our exhaust system, just in case, but for
the most part, they're on 24/7/365.  We've been running this way forever,
and have experienced excellent results.  I will say that we also have about
160 points of gas detection scattered throughout the fab, monitored by our
TGMS, so we're doing an extensive sampling for leaks.  Our TGMS can turn
off the specific gas cabinet if a leak is detected.

Thanks,

Dennis Schweiger
Facilities Manager
University of Michigan/LNF

734.647.2055 Ofc


On Fri, Dec 4, 2020 at 7:45 PM Manish Keswani <manish.keswani01 at gmail.com>
wrote:

> 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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