Responses from Stanford CHO
1) Are fume hoods being tested at your institution using face velocity or another method? The certification procedure conforms to Cal/OSHA 8 CCR 5154.1 and involves: (a) Qualitative evaluation ("smoke test") to evaluate inward flow/containment, and (b) a quantitative evaluation of the face velocity using thermal anemometer in grid intervals of 1 foot of less.
2) Have you set a limit on the sash height (12 or 18 inches) or other height? Sash height limit is 15 inches.
2a) If so, are you conducting the face velocity at that height? Sash is positioned at 15 inches during the above tests.
2b) Are you testing the hood at full open as well? No.
3) If you are using face velocity, has an "acceptable range" been established? If so:
3a) What is that range? The average face velocity is greater than or equal to 100 fpm, with a minimum of 70 fpm at any point.
3b) What is the procedure if the face velocity is outside of that range? Fume hoods are tagged out of service and immediate repairs are conducted by SU's HVAC Shop or Engineering & Maintenance.
From: DCHAS-L Discussion List [mailto:dchas-l**At_Symbol_Here**MED.CORNELL.EDU] On Behalf Of Lisa Phillips
Sent: Monday, October 13, 2014 1:55 PM
To: DCHAS-L**At_Symbol_Here**MED.CORNELL.EDU
Subject: [DCHAS-L] Hood inspections
I have been asked to post the following questions for the group to respond. Please send the response to me privately and I will compile the answers and post.
1) Are fume hoods being tested at your institution using face velocity or another method?
2) Have you set a limit on the sash height (12 or 18 inches) or other height?
2a) If so, are you conducting the face velocity at that height?
2b) Are you testing the hood at full open as well?
3) If you are using face velocity, has an "acceptable range" been established? If so:
3a) What is that range?
3b) What is the procedure if the face velocity is outside of that range?
Thanks in advance for your assistance,
Lisa
Sent from my iPhone
