DCHAS-L Archives, Feb 25, 2016 - Re: [DCHAS-L] Base baths outside a fume hood

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Date: Feb 25, 2016 01:00 UTC

Author: Peter Zavon <pzavon**At_Symbol_Here**rochester.rr.com>

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Subject: Re: [DCHAS-L] Base baths outside a fume hood

Date: Feb 25, 2016 12:49 UTC

Author: Don Abramowitz <dabramow**At_Symbol_Here**BRYNMAWR.EDU>

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Risk Assessment: Flammable (LOW RISK) and Corrosive (HIGH RISK).

Not sure of the LEL for IPA, but I would evaluate possible ignition sources with he researchers, hood or not.

As for exposure risk to the researchers, there is no PEL for IPA and most would balk at anyone complaining about breathing is dilute vapors of IPA. What you have to be concerned with here is the severe caustic hazard. Ensure proper eye protection and a compliant eye wash (hands free, bi-ocular, operated with one motion, and 60F min for 15 min). The Guardian - Model G5022 is a nice unit if you need to purchase one (~$250) and can core drill you bench-top. Skin exposure will dehydrate the skin and cause dermatitis quickly.

As for the sink drains, you must protect all drains (consider floor drains too). I would use good secondary containment and do not store in the sink (avoid on the bench-top next to the sink when possible). Have spill pads and a spill kit with alkali neutralizer. Again, use secondary containment, you may need large carboys and large funnels to bulk this up for waste disposal when the bath is spent.

Depending on the size, shape of the container, seal of the closure, and process, you may still need a fume hood. Have the researchers participate in the risk assessment, and come to the best solution with their input. I know many labs to use base baths without taking up valuable real estate in the fume hood.

Be well,

James F. Saccardo, CHMM

From: DCHAS-L Discussion List <dchas-l**At_Symbol_Here**med.cornell.edu> on behalf of Julie and Rob McLachlan <mclachlanrj**At_Symbol_Here**SYMPATICO.CA>
Sent: Wednesday, February 24, 2016 10:04 AM
To: DCHAS-L**At_Symbol_Here**MED.CORNELL.EDU
Subject: Re: [DCHAS-L] Base baths outside a fume hood

Please look at the flammability of the Isopropanol. We put our base bath in a Rubbermaid tote in a fire proof bin. Look for parts cleaner or rinse or dip tank safety containers.

http://www.justritesafetyonline.com/c-100-tanks.aspx

You also need good ventilation when using it, but we found it was okay close to a fume hood, but not in the fume hood.

Julie McLachlan

Date: Wed, 24 Feb 2016 14:28:19 +0000
From: cekohler**At_Symbol_Here**IU.EDU
Subject: [DCHAS-L] Base baths outside a fume hood
To: DCHAS-L**At_Symbol_Here**MED.CORNELL.EDU

All,

We frequently see base baths located outside of fume hoods. If they are covered and secure we haven’t objected to this in the past.

What are your opinions regarding placement of base baths outside fume hoods, near sinks, and on the floor in 5-gallon buckets?

Thanks,

Chris

Christopher E.. Kohler, MS, LPG, CCHO

Laboratory Safety Manager, EHS

Laboratory Safety Instructor, ACS

Adjunct Faculty, SPEA

Environmental Health and Safety

1514 E Third Street

Bloomington, IN 47405

(812) 855-5454

cekohler**At_Symbol_Here**iu.edu

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