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Subject: Re: [DCHAS-L] Summer Chemistry Camp?

Date: Mar 2, 2019 12:52 UTC

Author: DAVID Katz <DAKATZ45**At_Symbol_Here**MSN.COM>

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Subject: Re: [DCHAS-L] Darkroom Design Standards

Date: Mar 3, 2019 21:30 UTC

Author: Mark Bachrach <markbachrach2015**At_Symbol_Here**U.NORTHWESTERN.EDU>

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From: James Kaufman <jim**At_Symbol_Here**LABSAFETY.ORG>

Subject: Re: [DCHAS-L] Scientist says some pollution is good for you - a disputed claim Trump's EPA has embraced

Date: Mar 2, 2019 14:58 UTC

Reply-To: ACS Division of Chemical Health and Safety

In-Reply-To: Re: [DCHAS-L] Scientist says some pollution is good for you - a disputed claim Trump's EPA has embraced

Demystify: 

Yes ... But ... don't forget NOAEL.

PS. "There's more to lab safety than just labs!"

James A. Kaufman, Ph.D.

Founder/President Emeritus
The Laboratory Safety Institute (LSI)

A Nonprofit Educational Organization for
Safety in Science, Industry, and Education

192 Worcester Street, Natick, MA 01760-2252
508-647-1900 Fax: 508-647-0062
Cell: 508-574-6264 Res: 781-237-1335
Skype: labsafe; 508-401-7406

jim**At_Symbol_Here**labsafety.org www.labsafety.org

Teach, Learn, and Practice Science Safely





On Thu, Feb 21, 2019 at 2:43 PM Zack Mansdorf <mansdorfz**At_Symbol_Here**bellsouth.net> wrote:

This is total junk science. The entire field of industrial hygiene is based on the dose response model. To assume that any "toxic" has a zero threshold is crazy. The best example is the trace minerals that are necessary to support human life. My morning dose of caffeine is heart healthy but probably carcinogenic just like the alcohol in my red wine. Paracelsus said way back in the late 1400's that "=E2=80=A6"Everything is a poison, nothing is a poison. It is the dose that makes the poison"

I could go on but won't.

The point is that we do need to regulate air pollutants in a sensible manner that considers cost/benefit. The EPA has been out of control for years and needs to be reformed so that they can continue to achieve their mission without hysteria from the press.

Zack