From: Stephen P George <spgeorge**At_Symbol_Here**UCSD.EDU>
Subject: Re: [DCHAS-L] Compressed Air 'grade' question
Date: Fri, 27 May 2016 22:55:16 +0000
Reply-To: DCHAS-L <DCHAS-L**At_Symbol_Here**MED.CORNELL.EDU>
Message-ID: A6E911DFFC0817468BA0E9CBBAB0506E95391A9D**At_Symbol_Here**XMAIL-MBX-BT1.AD.UCSD.EDU

Perhaps this would be helpful?




Stephen George, Ph.D.

Dept. Safety Officer

Department of Chemistry and Biochemistry

University of California, San Diego

Ph: 858-534-5906 I Cell: 858-775-1492

Email: spgeorge**At_Symbol_Here**




From: DCHAS-L Discussion List [mailto:dchas-l**At_Symbol_Here**] On Behalf Of Debbie M. Decker
Sent: Friday, May 27, 2016 2:44 PM
Subject: [DCHAS-L] FW: Compressed Air 'grade' question


Please excuse the cross-posting.


Hi gang:


Anyone have any ideas for Cody?  The google isn't very helpful.





-----------Original Message------------------


From: Cody
Sent: Wednesday, May 25, 2016 10:27 AM
To: Debbie M. Decker <dmdecker**At_Symbol_Here**>
Subject: Compressed Air 'grade' question


Good morning!

I have a question that I was hoping you could help me answer.

What is grade 4 compressed air? what standard is that grade referring to?

Basically I need to present my PI with some information on the quality of our building compressed air compared to other options..


Scott (Facility Manager) has told me that the building compressed air line delivers "Grade 4" compressed air, which he found out from the ladies and gentlemen who maintain the pumps in the basement..


I have not been able to figure out what set of standards compressed air is measured by. I've heard of 'medical grade' and 'scuba diving grade'.... but even those are confusing me now that I've looked into it more.


Any ideas?


Thank you and have a great Wednesday!



Debbie M. Decker, CCHO, ACS Fellow

Immediate Past Chair, Division of Chemical Health and Safety

University of California, Davis





Birkett's hypothesis: "Any chemical reaction

that proceeds smoothly under normal conditions,

can proceed violently in the presence of an idiot."



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