FIELD-BASED INVESTIGATION ON VERTICAL DISTRIBUTION OF AIRBORNE PARTICULATE MATTER IN MULTI-STOREY BUILDINGS

The aim of the study is to quantify the traffic generated particle number concentration levels (PM2.5; PMwith diameter ? 2.5?m) at various heights of a typical high-rise building in close proximity to a majorexpressway in Singapore. A 22-storey naturally-ventilated high-rise residential building located about15m away from a major expressway was selected for the study.