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Subject: Re: [DCHAS-L] Should undergraduate students wear eye protection in a Fine Arts studio.
Date: Thursday, March 5, 2015 10:25:24 AM
Author: "Buczynski, Michael" <Michael.Buczynski**At_Symbol_Here**RB.COM> 		Next by Date:
Subject: Re: [DCHAS-L] Should undergraduate students wear eye protection in a Fine Arts studio.
Date: Thu, 5 Mar 2015 14:00:31 -0600
Author: Christian Hoydic

From: Ernie Lippert <ernielippert**At_Symbol_Here**TOAST.NET>
Subject: [DCHAS-L] Mercury in laboratory effluent
Date: Thu, 5 Mar 2015 10:55:45 -0500
Reply-To: DCHAS-L <DCHAS-L**At_Symbol_Here**MED.CORNELL.EDU>
Message-ID: 000001d0575c$d8079e10$8816da30$**At_Symbol_Here**toast.net


The ASTM method D1252-88, Standard Test Methods for Chemical Oxygen Demand (Dichromate Oxygen Demand) of Water is used as the basis of determining the COD for other materials, not just [waste] water. This procedure specifies the use of 1 gm of mecuric sulfate per sample to minimize the effect of chloride ions which may be present. The waste from such determinations contains considerable mercury. There are likely to be other procedures in which mercury is used. How do academic and commercial labs economically handle such waste that consists mostly of water containing Hg and a few other less regulated contaminants? I believe the current allowable level for discharge is 1.0 ppb Hg.

 

Regards,

Ernest Lippert

 

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