Date: Mon, 3 Apr 2006 07:29:35 -0400
Reply-To: Loretta Mueller <lmueller**At_Symbol_Here**VACCINEX.COM>
Sender: DCHAS-L Discussion List <DCHAS-L**At_Symbol_Here**LIST.UVM.EDU>
From: Loretta Mueller <lmueller**At_Symbol_Here**VACCINEX.COM>
Subject: Re: Lab Ventilation with multiple hazards
Comments: To: List Moderator

reply-type=response All, Thank you for your response. Please let me clarify my question. We are using chemical fume hoods and PPE to protect the users from exposures to hazardous chemicals. In fact these fume hoods are an integral part of our lab ventilation system as they serve as the exhaust from the laboratory. I am concerned about the number of air changes in the room in the event of a spill or emergency where hazardous chemicals are accidentally released into the laboratory air space. We have SOP's in place for evacuation of lab spaces in case of such an emergency. Knowing ach is an important part of the equation for emergency response. At 21 ach we are getting quite a bit of turbulence in the air in the lab and I was wondering if reducing the ach would help and still be acceptable from a safety standpoint. Respectfully yours, Loretta Mueller Vaccinex Inc ----- Original Message ----- From: "List Moderator" To: Sent: Friday, March 31, 2006 4:52 PM Subject: [DCHAS-L] Lab Ventilation with multiple hazards > From: lmueller**At_Symbol_Here** > Date: March 31, 2006 3:44:45 PM EST > > I am looking for some guidelines regarding air changes required in > laboratories where hazardous chemicals as well as recombinant DNA and > bacteria are used on a laboratory/research scale. We currently have 21 > air changes / hr, is it ok to scale back to 10? > > Thank you, > Loretta Mueller > Vaccinex Inc >

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