Make sure to properly use Hazardous Waste Tags!

Mary Tang mtang at
Tue Dec 9 13:35:05 PST 2008

Dear labmembers --

Please make sure to properly fill out hazardous waste tags when 
disposing of chemical waste. 

1.  Use complete, proper chemical names.  DO NOT use acronyms or trade 
names ("Cr14 etch") but list all the chemicals in the mix. Stanford EH&S 
(Environmental Health & Safety) department needs to know what the 
chemicals are in order to properly sort and dispose of them (and they 
are not going to know what "Gold Etch" or "AL12" means.)

2.  Examples are posted at the Chemicals Passthrough.  Chemical 
compositions for the most chemical mixtures are now posted there too.  
(And if your favorite chemical mixture isn't listed, let Uli know.)

3.  For hazardous waste tags that are not properly filled out:  you will 
be called back into the lab to fill out a proper tag.  Second offense, 
you'll be expected to help staff label, bag and sort general lab waste. 

We realize that many labmembers are electrical engineers with a year of 
undergraduate general chemistry a distant memory...  But it is important 
that everyone one of us is diligent in managing our chemical waste in a 
way that makes it safe for us, for the people who have to take care of 
it, and our environment.  If you have any questions about these 
procedures, the documentation, or other chemical safety concerns, please 
bring them up with your favorite staff member.

Thanks for your attention --

Your Lab Staff

Mary X. Tang, Ph.D.
Stanford Nanofabrication Facility
CIS Room 136, Mail Code 4070
Stanford, CA  94305
mtang at

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