Date: Tue, 23 Feb 2010 14:35:40 -0500
Reply-To: DCHAS-L Discussion List <DCHAS-L**At_Symbol_Here**LIST.UVM.EDU>
Sender: DCHAS-L Discussion List <DCHAS-L**At_Symbol_Here**LIST.UVM.EDU>
From: "Haugen, Bob" <drhaugen**At_Symbol_Here**KEWAUNEE.COM>
Subject: Re: Decommissioning Fume Hoods/Traps
In-Reply-To: A<2D10722CDD332D4B8D9E287332F92B963A20DFD915**At_Symbol_Here**>
Please note:

Older hoods with grey cement board liner probably contain entrapped
asbestos fiber in the cement!

Bob Haugen

-----Original Message-----
From: DCHAS-L Discussion List [mailto:DCHAS-L**At_Symbol_Here**] On Behalf Of
Ringen, Sonja G.
Sent: Tuesday, February 23, 2010 2:27 PM
To: DCHAS-L**At_Symbol_Here**LIST.UVM.EDU
Subject: Re: [DCHAS-L] Decommissioning Fume Hoods/Traps


We are replacing 14-18 fume hoods and have been considering how to
decommission the hoods and ductwork.  

ANSI/AIHA Z9.11-2008 (Laboratory Decommissioning) provides the framework
of our plan.  It all starts with a needs assessment, and since you know
the history of most of the labs, you have a good beginning.  In our
case, some of the hoods are >40 years old and memories are somewhat
vague. However, we do know that certain types of research have never
been done in the labs, including biological work.  

One of our largest concerns is disposal of the items. We know that
acids, bases, and light solvents have been consistently used over the
years.  Therefore, wipe tests for heavy metals (the RCRA 8 plus Be and
Ni), PCB's, asbestos (not only transite liners, but also in the
ductwork), and radioactive materials will be taken using NIOSH
procedures wherever possible.  

Based on the initial assessment, we'll have a better idea which hoods
are of concern, and which materials are causing the concern.  This
applies both to the contractor removing the items, and the final
disposal of the items.

The appendices in the ANSI/AIHA Z9.11-2008 are helpful with choosing
analytes, guidance for wipe sampling, regulated levels, and hazard

Sonja Ringen
Office of Safety, Health and Environment NIST/Boulder
325 Broadway, MC 173.02
Boulder, CO  80305

Phone: 303.497.7389
Mobile: 303.961.9251

-----Original Message-----
From: DCHAS-L Discussion List [mailto:DCHAS-L**At_Symbol_Here**LIST.UVM.EDU] On Behalf Of
Margaret Rakas
Sent: Tuesday, February 23, 2010 8:05 AM
To: DCHAS-L**At_Symbol_Here**LIST.UVM.EDU
Subject: [DCHAS-L] Decommissioning Fume Hoods/Traps

Good morning,

We're doing some laboratory renovations and I am interested in hearing
from others who have decommissioned labs for your renovators...

If you were requested to "evaluate laboratory fume hoods for the
potential of hazardous materials through wipe sampling", and you knew no
perchlorates were ever used, did you test for anything else?  (What
materials actually CAN be analyzed this way?  These are fume hoods that
need a wipe-down, but aren't showing signs of significant contamination)

If you were requested to 'biologically and chemically decontaminate
traps" for chemistry labs, what did you/your outside contractors do?

I want tomake sure these areas are safe for the workers, and will
contract out this work to a hazmat/hazwaste specialty vendor, but I want
to know what is reasonable to do...I have a fair idea of the history of
most of the labs so if there is a 'flow chart' approach that would be
very helpful.

Many thanks!

Margaret A. Rakas, Ph.D.
Manager, Inventory & Regulatory Affairs
Clark Science Center
Smith College
Northampton, MA. 01063
p:  413-585-3877
f:   413-585-3786 

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