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Hi Manish,</div>
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Stanford is governed by the Santa Clara County Toxic Gas Ordinance, which exceeds or embellishes California building and fire code. (For reference: <a href="https://www.sccgov.org/sites/hazmat/programs/tgo/Pages/home.aspx">https://www.sccgov.org/sites/hazmat/programs/tgo/Pages/home.aspx</a>)
With automated gas cabinets and the required gas detection, we can keep our cylinders always open and available. The built-in engineering controls on the cabinets (normally closed valves, flame detectors for silane, pneumatic cylinder valves in many cases)
both satisfy County code and let us sleep at night. </div>
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Best,</div>
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Carsen</div>
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<span style="color:rgb(0,0,0); font-family:Arial,Helvetica,sans-serif; font-size:12pt">Carsen Kline</span><br>
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Lab Operations Manager</div>
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Stanford Nanofabrication Facility</div>
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650-724-8214</div>
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snfexfab.stanford.edu</div>
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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> Friday, December 4, 2020 2:11 PM<br>
<b>To:</b> labnetwork@mtl.mit.edu <labnetwork@mtl.mit.edu><br>
<b>Subject:</b> [labnetwork] Toxic gases</font>
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Happy Friday everyone,</p>
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I have a question related to toxic gases in our nano fabrication center.</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.</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.”</p>
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Thanks in advance,</p>
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Manish Keswani</p>
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Lawrence Livermore National Laboratory</p>
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