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Subject:
Precipitate Sampling
Date:
Dec 21, 2010 19:15 UTC
Author:
Eric Clark <erclark**At_Symbol_Here**PH.LACOUNTY.GOV>
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Subject:
Re: Precipitate Sampling
Date:
Dec 21, 2010 20:40 UTC
Author:
Fred Simmons <fred.simmons**At_Symbol_Here**SRS.GOV>
From:
Don Abramowitz <dabramow**At_Symbol_Here**BRYNMAWR.EDU>
Subject:
Re: Precipitate Sampling
Date:
Dec 21, 2010 20:40 UTC
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<AANLkTimqbkPDK92kDvaAurvM_RdRHqLS_XxGNV=HAOAi**At_Symbol_Here**mail.gmail.com>
Date: Tue, 21 Dec 2010 15:40:49 -0500
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From: Don Abramowitz <dabramow**At_Symbol_Here**BRYNMAWR.EDU>
Subject: Re: Precipitate Sampling
In-Reply-To: <AANLkTimqbkPDK92kDvaAurvM_RdRHqLS_XxGNV=HAOAi**At_Symbol_Here**mail.gmail.com>
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>I would guess silver to be your primary contaminant of concern from the ph
oto lab, especially with a TLV of 0.01 mg/M3 for soluble salts. I'm n
ot sure exactly what goes on in a metal arts lab, but if it generated dust,
I imagine some of that ended up going down any floor drains and sinks with
routine cleaning. A TCLP for metals would be helpful for disposal de
terminations, but an ICP analysis for "total" metals may reveal more about
metals that may become airborne in the dust. (TCLP uses an mildly aci
dic solution to "leach" metals from the sample. It can miss less solu
ble forms. ICP should cost a bit less, since you skip the leaching st
ep, and give you a more representative picture of what's in the base materi
al.
There's a decent description of developer chemicals here, includ
ing some historical chemicals and their modern replacements:
http://en.wikipedi
a.org/wiki/Photographic_developer (I'm sure there are more credib
le references, but it's not a bad start.) There may be some sen
sitizers present here, but I don't know how long they would persist in the
tunnel environment, and I don't think it would be easy to get an analysis o
f all the possibilities. Controlling for exposure to the metals (skin
and respiratory protection) may also provide adequate protection fro
m the other possible contaminants.
Don
Donald Abramowitz, CIH
Environmental Health & Safety Officer
Bryn
Mawr College
Bryn Mawr, PA
