From: "Stuart, Ralph" <Ralph.Stuart**At_Symbol_Here**KEENE.EDU>
Subject: Re: [DCHAS-L] HCl concentration and hazard
Date: Sun, 5 Mar 2017 19:15:57 +0000
Reply-To: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
Message-ID: 95BF2986-E6A9-40CF-AB65-2DEAB13BB9D6**At_Symbol_Here**
In-Reply-To <1109037139E1524980CF9CBEB2476618010AE4ACCA**At_Symbol_Here**>

>Believe it or not, her biggest concern was over making hydrogen gas.
Another issue that was mentioned to me by less experience teachers was concern about how to deal with chemical wastes associated with the penny and acid residues. While many school districts have waste management programs, others seem to leave it up to the teachers to decide what should be done with materials that are not well-defined because their chemical components have obviously changed during their use.

> >I would be comfortable having high school students in my charge use it when there is good ventilation.

In your mind, does this mean a fume hood or can this be done by some number of students at their benches? Discussions with teachers tend to equate good ventilation with fume hoods, although they often mention that they als rely on the walls of the fume hood to delineate the "dirty" work area as well.

> > Because I am asthmatic, I am probably overly aware of inhalation hazards.

This consideration would apply to students as well; the CDC indicates that 8% of children report asthmatic symptoms.

> > I am a firm believer that middle-of -the-road students get more engaged in the learning when they are doing something hands-on and generating data that is their own and do learn better due to being more engaged.

That's an interesting observation. Do you know of literature that this idea is based on?

Thanks to everyone for their thoughts on these questions.

- Ralph

Ralph Stuart, CIH, CCHO
Environmental Safety Manager
Keene State College
603 358-2859


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