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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='color:#1F497D'>Please see below. Has anyone been using or storing chlorine gas in the Building 579 – Engineering 1, especially the ground floor? We need to identify the source and the distribution of gas.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Ken Perlowski<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Harold, Michael P <br><b>Sent:</b> Tuesday, July 15, 2014 9:13 AM<br><b>To:</b> Perlowski, Ken<br><b>Cc:</b> Rifai, Hanadi S; Donnelly, Vincent M<br><b>Subject:</b> FW: Chlorine<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span style='color:#1F497D'>Ken, please see findings below. It seems that the chlorine is coming from an unknown source. The readings are uniform throughout the basement.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Note this is not something to dismiss as the threshold limiting value for chlorine is 0.5 ppm<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><a href="https://www.mathesongas.com/pdfs/products/threshold-limit-values-%28tlv%29.pdf">https://www.mathesongas.com/pdfs/products/threshold-limit-values-%28tlv%29.pdf</a><o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>My suggestion is that Environmental Health and Safety do a thorough study of the situation.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Thanks,<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Mike <o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Donnelly, Vincent M <br><b>Sent:</b> Tuesday, July 15, 2014 8:14 AM<br><b>To:</b> Harold, Michael P<br><b>Subject:</b> Fwd: Chlorine<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal><br><br>Sent from my iPhone<o:p></o:p></p></div><div><p class=MsoNormal style='margin-bottom:12.0pt'><br>Begin forwarded message:<o:p></o:p></p></div><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><div><p class=MsoNormal style='margin-bottom:12.0pt'><b>From:</b> "Donnelly, Vincent M" <<a href="mailto:vmdonnel@Central.UH.EDU">vmdonnel@Central.UH.EDU</a>><br><b>Date:</b> July 15, 2014 at 8:13:00 AM CDT<br><b>To:</b> "Samara, Vladimir" <<a href="mailto:vsamara@Central.UH.EDU">vsamara@Central.UH.EDU</a>><br><b>Cc:</b> "Inyang, Otu" <<a href="mailto:oinyang@Central.UH.EDU">oinyang@Central.UH.EDU</a>>, "Economou, Demetre J" <<a href="mailto:chee1m5@Central.UH.EDU">chee1m5@Central.UH.EDU</a>>, "Weed, Anna-Marie Karen" <<a href="mailto:anna-marie.weed@email.wsu.edu">anna-marie.weed@email.wsu.edu</a>>, "Tremont, Joe" <<a href="mailto:JLTremont@Central.UH.EDU">JLTremont@Central.UH.EDU</a>>, "Greff, Reggie" <<a href="mailto:rmgreff@Central.UH.EDU">rmgreff@Central.UH.EDU</a>>, Sanbir Kaler <<a href="mailto:sanbir_kaler@yahoo.com">sanbir_kaler@yahoo.com</a>><br><b>Subject:</b> <b>Re: Chlorine</b><o:p></o:p></p></div></blockquote><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><div><div><p class=MsoNormal>Otu<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>We only have one chlorine cylinder and it is already isolated in a vented gas cabinet. If we put the sensor next to the cylinder the reading is lower than below the air conditioner. It is not coming from that cylinder. <o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>I think someone needs to see where the air intake is for the basement air feed and test there.<br><br>Sent from my iPhone<o:p></o:p></p></div><div><p class=MsoNormal style='margin-bottom:12.0pt'><br>On Jul 14, 2014, at 5:18 PM, "Samara, Vladimir" <<a href="mailto:vsamara@Central.UH.EDU">vsamara@Central.UH.EDU</a>> wrote:<o:p></o:p></p></div><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><div><p class=MsoNormal><span style='color:#1F497D'>We were moving the detectors around the lab and managed to set the alarm off (0.5 PPM) by placing it under the ventilation. Then we moved it away from the ventilation and it went back to 0.4 PPM. Then we put it back under the ventilation and it was back to 0.5 PPM so it seems that the source (in our lab) is the ventilation (even if it is not chlorine, something else is coming through the ventilation).</span><o:p></o:p></p><p class=MsoNormal><span style='color:#1F497D'> </span><o:p></o:p></p><p class=MsoNormal><span style='color:#1F497D'>Regards,</span><o:p></o:p></p><p class=MsoNormal><span style='color:#1F497D'>Vladimir</span><o:p></o:p></p><p class=MsoNormal><span style='color:#1F497D'> </span><o:p></o:p></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Inyang, Otu <br><b>Sent:</b> Monday, July 14, 2014 2:31 PM<br><b>To:</b> Samara, Vladimir<br><b>Cc:</b> Donnelly, Vincent M; Economou, Demetre J; Weed, Anna-Marie Karen; Tremont, Joe; Greff, Reggie<br><b>Subject:</b> RE: Chlorine</span><o:p></o:p></p></div></div><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal><span style='color:#1F497D'>Dear Vladimir,</span><o:p></o:p></p><p class=MsoNormal><span style='color:#1F497D'>I am waiting to see if there information on who could be using chlorine within the building. While we wait for that, please try to isolate the cylinders in the lab to see if you can find a small leak. </span><o:p></o:p></p><p class=MsoNormal><span style='color:#1F497D'> </span><o:p></o:p></p><div><p class=MsoNormal><i><span style='font-family:"Times New Roman","serif";color:#1F497D'>Regards,</span></i><o:p></o:p></p><p class=MsoNormal><i><span style='font-family:"Times New Roman","serif";color:#1F497D'>Otu Inyang</span></i><o:p></o:p></p></div><p class=MsoNormal><span style='color:#1F497D'> </span><o:p></o:p></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Samara, Vladimir <br><b>Sent:</b> Monday, July 14, 2014 1:39 PM<br><b>To:</b> Inyang, Otu<br><b>Cc:</b> Donnelly, Vincent M; Economou, Demetre J; Weed, Anna-Marie Karen<br><b>Subject:</b> Chlorine</span><o:p></o:p></p></div></div><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal>Hi Otu,<o:p></o:p></p><p class=MsoNormal>This morning Cl2 concentration in the lab and my office (closed) was again 0.5 PPM (with average over night of 0.4 PPM). Since then we kept open the door and it stabilized at 0.4 PPM. In meantime I measured the concentration around and found that in the main hallway (between the labs) it is 0.4 PPM while in the hallway outside (the open one) it is 0.3 PPM. Outside the building it is 0.0 (it takes about 3 minutes to drop from 0.4 to 0.0 PPM).<o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal>It seems that there is a very small leak (in the lab or somewhere else) but because we are the lowest level Cl2 get accumulated in our lab (and hallways) over weekend and overnight. During the day the concentration goes slightly down due opening the doors.<o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal>All our Cl2 sources were closed during the weekend and the main Cl2 pipeline was pressurized with N2 (and stayed at high pressure without a leak) so that couldn’t be the source of the leak.<o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal>Best regards,<o:p></o:p></p><p class=MsoNormal>Vladimir<o:p></o:p></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#404040'> </span><o:p></o:p></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#404040'>Vladimir Samara, PhD</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#404040'>Department of Chemical and Biomolecular Engineering</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#404040'>Engineering Building 1, Room S-222</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#404040'>University of Houston</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#404040'>4800 Calhoun Rd.</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#404040'>Houston, TX 77204-4004</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#404040'> </span><o:p></o:p></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#404040'>Tel: 713-743-4339 FAX: 713-743-4323</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#404040'>Email: <a href="mailto:vsamara@uh.edu">vsamara@uh.edu</a></span><o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p></div></blockquote></div></blockquote></div></body></html>