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The Micro/Nano Technology Center at the University of Louisville has the same protocol. We do not turn off our cylinders, but they controlled by our gas cabinets and TGMS system.</div>
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<p style="margin-top: 0px; margin-bottom: 0px;">Cheers!</p>
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<p style="margin-top: 0px; margin-bottom: 0px;">Julia Aebersold, Ph.D.</p>
<p style="margin-top: 0px; margin-bottom: 0px;">Manager, Micro/Nano Technology Center</p>
<p style="margin-top: 0px; margin-bottom: 0px;">University of Louisville</p>
<p style="margin-top: 0px; margin-bottom: 0px;">2210 South Brook Street</p>
<p style="margin-top: 0px; margin-bottom: 0px;">Shumaker Research Building, Room 233</p>
<p style="margin-top: 0px; margin-bottom: 0px;">Louisville, KY 40292</p>
<p style="margin-top: 0px; margin-bottom: 0px;">(502) 852-1572</p>
<p style="margin-top: 0px; margin-bottom: 0px;"><a tabindex="0" href="http://louisville.edu/micronano">http://louisville.edu/micronano/</a></p>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> labnetwork-bounces@mtl.mit.edu <labnetwork-bounces@mtl.mit.edu> on behalf of Manish Keswani <manish.keswani01@gmail.com><br>
<b>Sent:</b> Sunday, December 6, 2020 3:26 PM<br>
<b>To:</b> labnetwork@mtl.mit.edu <labnetwork@mtl.mit.edu><br>
<b>Subject:</b> Re: [labnetwork] Toxic gases</font>
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Thank you so much everyone for such an enthusiastic response. It seems clear that at most facilities (if not all), the gas cylinders are always kept open. We also have TGMS in our cleanroom which allows monitoring of the toxic gases at multiple locations (source
and delivery point) and will shut off the ESO valve in the event of a leak. </p>
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We will work with our safety and ES&H teams to change our current practice of turning off the gases when not in use.</p>
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Regards,</p>
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Manish </p>
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<div dir="ltr" class="x_gmail_attr">On Fri, Dec 4, 2020 at 2:11 PM Manish Keswani <<a href="mailto:manish.keswani01@gmail.com">manish.keswani01@gmail.com</a>> wrote:<br>
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Happy Friday everyone,<u></u><u></u></p>
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I have a question related to toxic gases in our nano fabrication center.</p>
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<u></u> <u></u></p>
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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.<u></u><u></u></p>
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<u></u> <u></u></p>
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“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.”<u></u><u></u></p>
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<u></u> <u></u></p>
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<u></u> <u></u></p>
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Thanks in advance,<u></u><u></u></p>
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Manish Keswani<u></u><u></u></p>
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Lawrence Livermore National Laboratory</p>
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