Author(s)

J. Sentian & L.B. Ngoh

Abstract

The concentration levels of carbon monoxide (CO), nitrogen dioxide (NO2) and particulates (PM10 and PM2.5) in underground and elevated car parks in Kota Kinabalu city were studied for a period of six months. The maximum 15-min average concentration of CO in the underground car parks was found to be higher than in elevated car parks, both during weekends and weekdays. Meanwhile for NO2, the maximum concentrations were comparatively higher in elevated car parks than in underground car park. Results have shown that none of the CO and NO2 concentration levels exceeded the Swedish STEL (15-min average) of 100 ppm and 5 ppm respectively. However, based on an 8-hr average, only CO concentration (26.0 to 29.5 ppm) in the WP underground car park during weekends has exceeded the Swedish Hygienic Limit (20 p

Keywords