Continuation of research and development related to indoor air quality monitoring. Final report.

An exposure chamber for testing passive dosimeters suitable for measuring indoor air pollutant concentrations has been designed. A simplified version of the chamber was constructed and formaldehyde passive sampling devices were exposed within this chamber. Both CSC prototype and AQRG dosimeters were tested, and an attempt was made at calibrating the devices by verifying their theoretical sampling rates. The sampling rate for CSC devices was found to behigher than expected. The simplified chamber was found to be useful for preliminary testing of the effects of air turbulence on the response of formaldehyde dosimeters, but more precise studies will require the use of the universal exposure chamber system and more reliable and accurate methods and protocols for monitoring the formaldehyde concentration in the chamber.