On Mon, Jan 26, 2015 at 4:35 PM, Jeff Tenney <Jeff.Tenney**At_Symbol_Here**sdmyers.com> wrote:

I would agree with most people and say that it is not the best solution to go ductless. There are too many issues that would need to be overcome (What happens during a power outage, how does one know when to change the filter, -etc.). I have also learned never to say never, is it one or 100 samples a week, a day? . I would offer you one piece of advice, Labconco offers the following: (it can help supply you with additional information)

Chemical Assessment

A Chemical Assessment Report can help you:

• Determine if a ductless enclosure is right for your application.

• Estimate filter life for a new or existing enclosure.

• Know the appropriate filters for your application.

When you submit the Chemical Usage Assessment Form, you will receive a valuable report that analyzes your application and/or ventilation equipment.

I still believe that a properly designed ducted system would be your best bet.

Jeff

From: DCHAS-L Discussion List [mailto:dchas-l**At_Symbol_Here**MED.CORNELL.EDU] On Behalf Of melissa.ballard**At_Symbol_Here**US.MICHELIN.COM
Sent: Monday, January 26, 2015 6:38 AM
To: DCHAS-L**At_Symbol_Here**MED.CORNELL.EDU
Subject: [DCHAS-L] ductless fume hoods for acid digestion

Good morning all! I have to take a minute to get some additional opinions on a topic. I've been approached to provide my 2 cents on the appropriateness of using a ductless fume hood for acid digestion (preparing samples for analysis via AA). This would be for use in an industrial quality lab.

I have my opinion; what is yours?

Thanks!

Melissa D. Ballard, MSPH, CIH, CHO
Industrial Hygienist / Industrial Hygiene Chemist
Michelin North America
1401 Antioch Church Road
Greenville, SC 29605
864-458-1843
melissa.ballard**At_Symbol_Here**us.michelin.com