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Subject: Re: [DCHAS-L] Is lead sheeting a source of lead dust? And-Chemical Exposure question...
Date: Friday, July 26, 2019 at 3:00:27 PM
Author: Ernest Lippert <ernielippert**At_Symbol_Here**TOAST.NET> 		Next by Date:
Subject: Re: [DCHAS-L] Is lead sheeting a source of lead dust? And-Chemical Exposure question...
Date: Fri, 26 Jul 2019 16:03:09 -0400
Author: Jeffrey Lewin

From: Monona Rossol <0000030664c37427-dmarc-request**At_Symbol_Here**LISTS.PRINCETON.EDU>
Subject: Re: [DCHAS-L] Is lead sheeting a source of lead dust? And-Chemical Exposure question...
Date: Fri, 26 Jul 2019 19:03:14 +0000
Reply-To: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
Message-ID: 1915925821.7320503.1564167794858**At_Symbol_Here**mail.yahoo.com
In-Reply-To <77FE358D-ABBB-48BA-96CB-F528937B2722**At_Symbol_Here**helixenv.com>


I sent Margaret a short article I wrote about the study that data on lead exposure from stacking the lead bricks, but having read these posts let me emphasize two points.

1.  That same study found the lead wipe samples in the storage area from 10 to 450 ug/ft2 and the OSHA definition of failure to do proper housekeeping in the OSHA lead standard is 200 ug/ft2.

2.  The assumption that only the corroded and oxidized lead was shedding was found not to be true.  Freshly cleaned surfaces also shed lead particles.  

Get the lead out.

Monona


-----Original Message-----
From: Ralph Froehlich <rfroehlich**At_Symbol_Here**HELIXENV.COM>
To: DCHAS-L <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
Sent: Fri, Jul 26, 2019 2:39 pm
Subject: Re: [DCHAS-L] Is lead sheeting a source of lead dust? And-Chemical Exposure question...

Lead oxide forms on the surfaces of metallic lead bricks used for radiation protection; DOE measurements indicate that merely lifting these bricks onto a cart for four hours may expose workers to elevated airborne lead exposures near to or in excess of the OSHA PEL of 50 =B5g/m3.

Ralph A. Froehlich, CIH, CSP, QEP
Helix Environmental, Inc. 
(937) 226-0650 office
rfroehlich**At_Symbol_Here**helixenv.com

The information contained in this electronic transmission is intended solely  for the recipient of this email. This electronic mail transmission may contain confidential or privileged information. If you have received this email in error, then any distribution, reading, copying, or use of this communication is strictly prohibited. Please notify us immediately of the error by phone or email. Thank you. helix**At_Symbol_Here**helixenv.com


On Jul 26, 2019, at 12:06 PM, Margaret Rakas <mrakas**At_Symbol_Here**SMITH.EDU> wrote:

So...two questions for Friday...

1) If you found a large stack of lead sheets...sitting in a storage area for some time (who knows how long!?)...would you be concerned about lead dust in the immediate area, say the surrounding floor?  I understand that grinding, sanding, filing, etc creates lead dust but this situation doesn't fit any of those...I cannot find any references so in case I'm imagining that just because it's soft, dust forms over time....I wanted to check....

2) A student asked me if there were any chemicals for which you would NOT want to use water in case of chemical exposure.  I did a quick search and the Canadian CCOHS (their OSHA) advises "...Note that the manufacturer/supplier .. may recommend an alternative agent in exceptional cases if water is clearly inappropriate."  I have read plenty of SDS's in my time but have never seen an SDS state anything other than using water as the first step.  Has anyone ever encountered any other initial instructions for dermal or eye exposure?  (Of course there may be additional steps AFTER water flushing, like use of calcium gluconate gel, etc)...

MANY THANKS and happy Friday to all!
Margaret


--
Margaret A. Rakas, Ph.D.
Lab Safety & Compliance Director
Clark Science Center
413-585-3877 (p)

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