New to v4.1
1.What is the expected duration for each sample location when using direct read? I cannot find any reference in either the ISO methods listed or in LEED
2. Are downloaded reports from the instrument required for reporting or can we use our own summary chart?
Afogreen Build
www.afogreenbuild.comGreen Building Consultant
214 thumbs up
December 21, 2021 - 5:59 pm
Hi James,
Thanks and regards.
Russ Pellegrino
Technical DirectorCentek Laboratories, LLC
16 thumbs up
December 22, 2021 - 8:57 am
James,
As a laboratory that is ISO17025 Certified and has been doing the LEED 3.2, V4 and 4.1 criteria for the IAQ testing, it is a question we get all the time since 4.1 came out. When V4 and 4.1 was issued it was stated that the time for sampling is left to the professional which leaves a wide-open area. As a laboratory you must sample as long as it takes to meet the required detection limit which could be as little as 2 hours, under our scope of work, or as long as 6-10 hours when using other types of media. Only the laboratory can tell you how long that period should be.
As far as handhelds are concerned there really isn't anything written on how long it should be however a good rule of thumb would be is you need to have a decent representative sample. Therefore, standing there for 5-10 minutes would not be a good idea. If you are sampling other parameters such as TVOC, formaldehyde, particulates the time you are sampling those with the other media, your handhelds should be kept there for the same amount of time.
One of the biggest issues that we have heard is that you need to make sure that the handheld can reach the minimum detection limit so if you’re doing particulates it needs to go down to 0.000001ug which is very difficult. Also, the cost for rentals could be extremely high so using a laboratory maybe less expensive.
I'd be more than happy to talk further to you about this, feel free to give me a call at 315-431-9730...Russ