Migration of vehicle-related emissions to offices using tracers: Case study at a bus repair facility


This study characterizes air flows and volatile organic compound (VOC) concentrations in a bus maintenance garage and its adjoining office. Fieldwork included deployment of multiple perfluorocarbon tracer (PFT) sources in both office and garage zones, and measurements of PFT, VOC, particulate matter (PM), elemental carbon (EC), carbon monoxide (CO) and carbon dioxide (CO2) concentrations over a 1-week period. Air exchange rates (AERs) were 1.2 h -1 in the office and 0.75 h-1 in the garage, and 11% of the air flow in the office originated from the garage. 37 VOC species were detected in offices, 36 in the garage, and 17 in ambient air. The garage showed high levels of VOCs related to fuels and solvents, e.g., tetrachloroethene and toluene concentrations averaged 240 and 129 μg m-3, respectively, while levels in the office were 40 and 23 μg m-3. Garage sources contributed the major share of most VOCs in the office.

Publication Title

9th International Conference and Exhibition - Healthy Buildings 2009, HB 2009

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