I beg to differ - if this is a hazardous waste, it may not be disposed of down the drain.
If this were a process waste hard-piped to a drain, your comment re: the POTW may apply.

Bottom line? All wastes should be properly characterized and handled appropriately. This is true whether we're looking at disposal of a solid waste under RCRA (which, of course, includes liquid wastes) or a process discharge to a POTW.

_________________

Anthony (Tony) Noce
518-466-5608
_________________

-----Original Message-----
From: ACS Division of Chemical Health and Safety [mailto:DCHAS-L**At_Symbol_Here**PRINCETON.EDU] On Behalf Of David Roberts
Sent: Tuesday, October 04, 2016 2:40 PM
To: DCHAS-L**At_Symbol_Here**PRINCETON.EDU
Subject: Re: [DCHAS-L] HPLC solvent disposal

It all depends on your POTW. Your University should have some sort of policy designating what is in fact drain disposable, and ideally that list has been confirmed and checked by your local POTW. If that‰??s not the case, then by all means you should collect it.

I have seen, in browsing the web for CHP‰??s, places that do state that formalin (<10%) and some acetonitrile solutions (maybe less than 20%, I don‰??t remember) are in fact drain disposable in their communities.

Dave

> On Oct 4, 2016, at 2:25 PM, Hung <000003225480afd0-dmarc-request**At_Symbol_Here**LISTS.PRINCETON.EDU> wrote:
>
> Hello Laurie,
>
> My experience is that it is never okay to dump chemicals into the sink. I work in a production lab and we currently put all hplc waste in a grounded 55 gallon drums and an approved waste company pick it up to dispose it properly. By law we don't have the authority to treat wastes like waste companies do. I hope this helps.
>
> John Nguyen
>
> On Oct 4, 2016 11:59 AM, Laurie Yoder wrote:
> >
> > We have a research group that wants to begin a HPLC project using tetrafluoroacetic acid/acetonitrile mix (diluted to 40% in water) as the solvent. The student working on the project has used this procedure at another institution and said they dumped the waste solvent down the drain. Really? I thought this would still have some characteristic hazard. Does anyone else have experience with this mixture, and how do you dispose of it properly?
> >
> > --
> > Laurie M. Yoder
> > Assistant Professor of Chemistry and Chemical Hygiene Officer
> > Eastern Mennonite University
> > 1200 Park Road
> > Harrisonburg, VA 22802
> > --- This e-mail is from DCHAS-L, the e-mail list of the ACS Division
> > of Chemical Health and Safety. For more information about the list,
> > contact the Divisional secretary at secretary**At_Symbol_Here**dchas.org
>
> --- This e-mail is from DCHAS-L, the e-mail list of the ACS Division
> of Chemical Health and Safety. For more information about the list,
> contact the Divisional secretary at secretary**At_Symbol_Here**dchas.org

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This e-mail is from DCHAS-L, the e-mail list of the ACS Division of Chemical Health and Safety.
For more information about the list, contact the Divisional secretary at secretary**At_Symbol_Here**dchas.org

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