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Abstract Biological materials in airborne particles (PM) have diverse sources, formation processes, composition and sizes. Knowledge has advanced substantially in recent years with regards to PM physical properties (mass, number, size) and chemical composition (chemical speciation).  However, less progress has been made in the characterisation of biological materials in PM and the interaction between its abiotic and biological components. This significantly limits understanding of the role and impact of PM in the context of public health (allergenicity, toxicity, infectivity), climate…

Many mistakenly assume that by following applicable building code and guidelines such as ASHRAE, they are providing properly decontaminated air. And, although the HEPA filter remains the best filter available for ventilation systems, like all filters there exists a determinable inefficiency zone that belies the myth that HEPA is the ultimate answer for air decontamination. To complete the air decontamination process initiated by filtration, Ultraviolet Germicidal Irradiation (UVGI) needs to be added. UVGI has a long history of being used for…

https://vimeo.com/512128601 Testing Buildings after Wild Fires / Bush Fires The first step in an assessment strategy is to know the objective.  Is it assessing contaminants associated with wildfire smoke that are indicators of site contamination, building contamination, occupant exposure, or all three?  Will you just assess products of combustion or also include contaminants resulting from water damage?  The second step is to select contaminants that can be associated with “condition”.  Will the assessment be able to conclude if the building,…

Overview Our chairpersons from across the globe from two of our most significant professional bodies will meet and discuss the skills we need to assess Indoor Air Quality risks in built environments! There is a distinct difference between the Indoor Environmental Professional and the Occupational Hygienist in the way we approach and assess Indoor Air Quality and Mould. Our presenters will be speaking on the background to these assessments, how we assess exposure and how we look at the bigger…

Canines have been used to detect hidden moulds for over 20 years. As one of the added investigative tools of a mould inspector, the dogs are able to pinpoint the location of mould infestations with a 98% rate of accuracy. They have been able to find mould behind fiber walls, wood and concrete. And they are your family friend when not working.