From: Harry J. Elston <helston**At_Symbol_Here**MIDWESTCHEMSAFETY.COM>
Subject: Re: [DCHAS-L] Regulations for Snorkels
Date: Tue, 26 Feb 2019 08:47:58 -0600
Reply-To: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
Message-ID: CAJ2hcfd+GsbceuoQPaCzeULPKy3etn_yqEidhu1UiDrvaYhxfA**At_Symbol_Here**mail.gmail.com
In-Reply-To


Elston's best practice guidance: Use a laboratory chemical hood. "Snorkels" become highly ineffective in capture after a couple of inches from the opening. You can run the calculation yourself from the ACGIH Vent manual, but generally speaking, unless you're almost right on top of the thing you need to need to exhaust, it won't work well.

I abhor them as effective local exhaust ventilation for general chemistry work.

Harry

On Tue, Feb 26, 2019 at 8:36 AM Samuella Sigmann <sigmannsb**At_Symbol_Here**appstate.edu> wrote:
Oh Wise Ones -

Are there any flow or testing regulations (ANSI or otherwise) for lab snorkels. Any best practice guidelines?

Thanks in advance,
Sammye

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Samuella B. Sigmann, MS, NRCC-CHO

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