Date: Wed, 18 Nov 2009 12:38:31 -0800
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: Craig Calvert <craig_a_calvert**At_Symbol_Here**YAHOO.COM>
Subject: Re: Latex degradation, low humidity, Chinese drywall?
In-Reply-To: <48A020E1942E024DB0F2A6B68A1312440783A5EDEC**At_Symbol_Here**>
Here is some info on Chinese Drywall Syndrom to help y ou assess this part of your concern.
Chine se Drywall Syndrome is caused by sufur in the minerals used in drywall.  This syndrome is associated with drywall installed after huricane Katrin a in 2005.  The low humidity in the building would slow down the relea se of the sulfur, as this syndrome is prevalent in the humid southeast wher e the sulfur is readily released by the moisture in the air.  I would recommend finding a piece of drywall that has the manufactuers name on it a nd checking if it is a US manufacturer.  I would recommend running an EPA TO15 test for volatile organics; have the lab screen for as many organo sulfur compounds as possible.   Also, check for black corrosion o f copper.  Normal copper patina is green; copper sulfide generally for ms a blackish corrosion. 
Below  ;are decent sites covering Chinese Drywall:
I have dealt with th is before and there is a battery of tests that can be run: ?nav=Services&action=list&ServiceCategoryID=21
I hope this helps.
 < /DIV>
Craig A. Calvert, PhD, C-CHO
Sci entist III
Fuss &am p; O'Neill EnviroScience, LLC
146 Hartford Road
Manchester, CT 06040
Phone: (860) 646-2469 x5571
Fax:   ;   (860) 533-5143
E-mail: ccalvert**At_Symbol_Here**< /DIV>
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< HR SIZE=1>From: Debbie M. Decker <dmdecker**At_Symbol_Here**UCDAVIS.EDU>
To: DCHAS-L**At_Symbol_Here**LIST.UVM.EDU
Sent: Wed, November 18, 2009 2:35:23 PM
Subject: [DCHAS-L] Latex degradation, low humidity, Chinese drywall?

Please excuse the cross-postings:


I=E2=80=99m working with a group that works in a se cured, containment facility.  The supply air is one pass, the exhaust is HEPA filtered and air change rates are in the 10-15 ACH.  Rubber ba nds, latex gloves, the gloves on a glove box, rubber stoppers, etc. degrade very quickly in this building =E2=80=93 a matter of months.  This cau ses consternation among my building occupants =E2=80=93 "if latex d egrades so quickly, what is this building doing to me?="


I have done the following :  datalogged temperature, %RH, CO and CO2 twice, at different times o f year, for a week.  First set showed extremely low humidity =E2=80=93 below 20%rh =E2=80=93 all other measurements within customary.  Secon d round showed %rh in a more normal range =E2=80=93 35-40%rh.  Magneti c fields were at or below background.  No radioactivity was detected.& nbsp; The building doesn=E2=80=99t have any weird smells, evidence of mold or water intrusion.  The mechanical system is working as designed, fil ters in place and without high pressure drop, coils clean, etc., according to my building engineers.


People complain of headaches and stuffy noses, general malaise after working in the building for some period of time.  Someone has s uggested Chinese drywall might be a culprit but I don=E2=80=99t know as it quite fits.


Wh addya think?  All ideas welcome, at this point.



D ebbie



Debbie M. Decker, Campus Chemical Safety O fficer
Environmental Health and Safety
University of California, Davi s
1 Shields Ave.
Davis, CA  95616
(530)754-7964/(530)752-4527 (FAX)
Co-Conspirator to Make the World A
Be tter Place -- Visit< /A> and join the conspiracy



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