From: Daniel Kuespert <0000057d3b6cd9b7-dmarc-request**At_Symbol_Here**LISTS.PRINCETON.EDU>
Subject: Re: [DCHAS-L] Arsenic in CCA wood
Date: Fri, 24 Jan 2020 10:59:15 -0500
Reply-To: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
Message-ID: BAC3E177-237F-4492-AB72-5856DCDA5A85**At_Symbol_Here**
In-Reply-To <1771238220.19069339.1579873114840**At_Symbol_Here**>

Thanks, Monona. Yes, I am fully seized of the need to figure out why and what the questioner wants to know. In this case, it's the mother of one of my daughter's friends, whose husband suffered long-term As poisoning, and as he was a carpenter who routinely worked with CCA-treated wood (in unventilated sheds, no less), she naturally connects it to the CCA. The children angle is basically a mother being concerned that her children played on CCA-treated playground equipment. 

I don't think she's out to sue anybody, more to figure out what and why something happened to her family. The literature is kind of opaque to me, and if I find it opaque, I'm sure she is completely confused.

If I read the EPA's probabilistic risk assessment for children's exposure correctly, it appears there's about a 10^-5 risk of arsenic-related cancers due to playground exposure. Not something I really want to rely on, simply because such estimates are so dependent on multiple assumptions. (Or, as sometimes occurs with environmental estimates, are simply bogus.)

Regards, Dan

Sent from my iPad

On Jan 24, 2020, at 08:44, Monona Rossol <0000030664c37427-dmarc-request**At_Symbol_Here**> wrote:

If I wasn't in such a time crunch, I could be more helpful.  But what I suggest is going to the prerule Federal Register discussions for the Arsenic standard and there would be studies specifically related to occupational exposure there on which the rule is based.  And I believe there is proposed regulation specific to the wood preservatives and there should be some references there to good studies. 

These memories are from the days when I got the FR in hard copy every day.   I now search the site on line.  It's still the best source for this kind of information in my view.

Since I take inquiries every day from the general public and have for 40 years, I'll also provide a bit of advice.  The first things you want to identify for yourself is why the person wants to know, and what you can read between the lines is the opinion that person actually hopes to hear from you. They all have a motive. Sometimes that either helps you in your search or it short circuits the work because you can find another way to get to the heart of the inquiry.

I say this because it is odd they are looking for occupational exposure during "use" and exposure of children to what?   Items made with the wood? To the dust from cutting the wood at home? Is this person a contractor being sued for installing this stuff or a householder looking to sue a contractor?  What?   

Life is short.  Find the short cuts.   Monona

-----Original Message-----
From: Daniel Kuespert <0000057d3b6cd9b7-dmarc-request**At_Symbol_Here**LISTS.PRINCETON.EDU>
Sent: Fri, Jan 24, 2020 6:14 am
Subject: [DCHAS-L] Arsenic in CCA wood

I've had a bunch of questions from a member of the public referred to me regarding arsenic exposure from chromated copper arsenic-treated wood. A brief literature search showed me that there's quite a bit of data and zillions of papers out there, but much of it is not quite what I=E2=80™m looking for. 

Is anyone aware of a good reference, preferably a review, that discusses CCA wood exposure hazards, particularly routes of exposure and toxicokinetics in both occupational use and in children? It would help short-circuit my lit search considerably.

Thanks in advance.


Daniel Reid Kuespert, PhD, CSP
11101 Wood Elves Way
Columbia, MD 21044

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