From: Benjamin G Owens <bowens**At_Symbol_Here**UNR.EDU>
Subject: Re: [DCHAS-L] Particulate protection from a milling machine
Date: Wed, 4 Mar 2015 21:11:24 +0000
Reply-To: DCHAS-L <DCHAS-L**At_Symbol_Here**MED.CORNELL.EDU>
Message-ID: 852F486739ECB34484E384E1D009D97D2B41445C**At_Symbol_Here**



When designing a ventilation system to capture and transport toxic particulate such as lead particulate, a particulate filter (perhaps a HEPA) will generally be located as close as possible to the capture point to minimize contamination of the ducting and HVAC system.  Proper transport velocity Is also required to prevent settling out of the particulate.  One commonly used ventilation design guide is the ACGIH publication Industrial Ventilation: A Manual of Recommended Practice for Design ( 





Ben Owens

Assistant Director, Laboratory Safety

Environmental Health and Safety Dept., MS 328

University of Nevada, Reno 89557

Office Phone: 775-327-5196

Cell Phone: 775-843-2113

Fax: 775-784-4553




From: DCHAS-L Discussion List [mailto:dchas-l**At_Symbol_Here**MED.CORNELL.EDU] On Behalf Of Suzy Arnette
Sent: Wednesday, March 04, 2015 11:58 AM
Subject: [DCHAS-L] Particulate protection from a milling machine


Good afternoon,


We have a lab that uses their milling machine in the chemical fume hood to protect the researchers from lead particulates in the material they are working on.  We are now getting push back from our HVAC folks about this process because they feel the particulates are clogging our heat capture coils.  


Do you any of you have similar processes?  Have you received push back from HVAC?


Thank you,




Suzy Arnette, PhD
Lab Safety and Design Manager
Radiation Safety Officer
Boise State University
Environmental Health, Safety, and Sustainability
Phone: 208.426.3906  

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