Is anyone aware of any guidance or standards specific to particulate levels (PM 2.5) for assessing indoor air quality? In California, we are experiencing very poor ambient air quality due to wildfires and many of our building occupants are concerned about particulate levels inside the building from the smoke. Ventilation systems at our site vary by building and some will vary by lab space, each can draw in differing amounts of fresh air. We have received requests from building occupants to evaluate indoor air quality for particulates. So aside from comparing inside with outside air readings using the same instrument (such as a Dust Track or an EVM), is anyone familiar with any guidelines or criteria that can be used for evaluating results of direct reading instruments for PM 2.5?
Dian Larson, PhD, CIH, CSP
Industrial Hygiene Group Leader
Lawrence Livermore National Laboratory