Date: Fri, 30 Oct 2009 10:47:35 -0700
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: Paul Sonnenfeld <p_sonnenfeld**At_Symbol_Here**HOTMAIL.COM>
Subject: Re: Roof top exhaust fan maintenance Policy
In-Reply-To: <684E8BFA09C42F43BA0A0D8772FD3BD85E797F87**At_Symbol_Here**>

Roof access is limited at our plant.  When we lock the access to the roof, we ensure that the spare key is in the Fire Department's lock-box in the event that they need access to the roof, especially after hours.  
I'll presume that you have a fall protection plan in place and that the aff ected employees have been trained on that plan.
We lock out fans/roof exhausts unless the maintenance tech is trying to tro uble-shoot faulty relays or motors.
I've seen PIDs employed to conduct real-time field screening by trained tec hnicians prior to the maintence crew starting their work.  At this p lant our challenge is bisphenol-A andepichlorohydrin.  Although the PEL for the latter is 5.0 ppm, the TWA is 0.5 ppm.  The maintenanc e techs really dislike wearing APRs when working on fan motors due to the s lightly obscured vision associated with the APR.

Paul Sonnenfeld, CPEA


Date: Fri, 30 Oct 2009 12:35:52 -0400
From: HouseKC**At_Symbol_Here**CORMETECH.COM
S ubject: Re: [DCHAS-L] Roof top exhaust fan maintenance Policy
To: DCHAS- L**At_Symbol_Here**LIST.UVM.EDU

What a great question!  We=92ve been having very similar issues, so any feedba ck anyone could provide would be GREATLY appreciated!



Katherine C. House, CCHO

Laboratory Co ordinator

Chemical Hygi ene Officer

Cormetech, Inc.

5000 Internat ional Drive

Durham, NC 27712

919.620.3044 (office)

919.815.2024 (mobile)

-----Original Message-----
DCHAS-L Discussion List [mailto:D CHAS-L**At_Symbol_Here**] On Behalf Of Wawzyniecki Jr, Stefan
Sen t: Friday, October 30, 2009 9:55 AM
To: DCHAS-L**At_Symbol_Here**LIST.UVM.EDU
Subject: [DCHAS-L] Roof top exhaust fan mainten ance Policy


In general, m aintenance staff working on rooftop fume hood exhaust equipment have indica ted their concerns about being on a roof, and possibly being exposed to w hatever is being vented. 


In a more speci fic laboratory situation, involving MOCVD (metal organic chemical vapor d eposition), we have a lock-out tag-out policy, due to the severity of t he toxic gases involved.




1.< FONT face="Times New Roman" size=1>      Does anyone else have MOCVD labs, and to what extent are control s in place for protection of workers on roof tops?

2.< FONT face="Times New Roman" size=1>      Does anyone else employ a LOTO policy?   

3.< FONT face="Times New Roman" size=1>      Are roof tops key-accessible only?


Thanks for the feedback.


-Stefan Wawzyni ecki, CIH, CHMM

 Univers ity of Connecticut

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