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Subject: US Nanotechnology Environmental,
Date: Tue, 7 Dec 2010 07:33:09 -0500
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Author: Ralph Stuart


Date: Tue, 7 Dec 2010 13:22:48 -0600
Reply-To: chemsafety**At_Symbol_Here**verizon.net
Sender: DCHAS-L Discussion List <DCHAS-L**At_Symbol_Here**LIST.UVM.EDU>
From: "Jay A. Young" <chemsafety**At_Symbol_Here**VERIZON.NET>
Subject: Re: OHSA/NIOSH Permissible limits
Jim,
 
NIOSH is an advisory to OSHA.  Its REL's are RECOMMENDED (to OSHA) , period.  OSHA's PEL's are mandatory limits which if exceeded can result in undesirable consequences.
Jay A.Young

Dec 3, 2010 04:54:18 PM, DCHAS-L**At_Symbol_Here**list.uvm.edu wrote:
Hello, all:

When the NIOSH pocket guide has different permissible limits (NIOSH versus OSHA), which is the better one to follow?

For example, benzene's limit for NIOSH is 0.1 ppm (10 hr workday), while OSHA's limit is 1 ppm (8 hour workday.)

Why the difference? From a legal perspective, which is a better choice?

Thanks in advance for any advice you might give; obviously, any advice people might give is non-binding, you're not responsible, legal mumbo-jumbo, blah, blah.

Cheers, Jim Tung

Lead Hazardous Waste Coordinator
Obiter Research LLC
Champaign, IL

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