[Histonet] PEL & STEL

[Vinnie Della Speranza]

If you've already received replies on the list, I may have missed them so feel free to disregard.

my understanding of the Formaldehyde standard is that it is NOT acceptable to measure only room air concentration. room sampling is not an accurate means for determining what your exposure was, since it is effected by air flow, room size and where in the room you are working.

Personal vapor monitoring using a vapor monitor device positioned near the 'breathing zone', i.e. lab coat lapel, for example, is the method to be used. 

if your safety officer wants to measure both, no reason not to but if you expect to be doing only the one method of sampling, you must use the personal vapor monitoring device for sampling. When taking STEL measurements, be certain that you are performing those tasks likely to represent your highest exposure, such as pouring off formaldehyde waste or changing out your processor(s)



Vinnie Della Speranza
Manager for Anatomic Pathology Services
Medical University of South Carolina
165 Ashley Avenue  Suite 309
Charleston, SC 29425
Ph: 843-792-6353
fax: 843-792-8974

>>> "Riesen, Rebecca" <rebecca.riesen <@t> dsilabs.com> 06/16/05 03:24PM >>>
	Hello HISTONETTERS:

	I have a new safety officer who wants me to just check formaldehyde and xylene levels for PEL & STEL with a "Room Monitor" instead of what I have always done, which is the individual personal badges.  Are there any regulations concerning this?  Is it ok to just monitor the "room"?  If you do the room monitoring, do you need to monitor the individual with an individual badge for the initial level?  Just curious as to what you folks are all doing out there.  THANKS!!!!

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