Comparation PM distribution between control sites and research site in Rawang City, Selangor

The object of this study is to create a collision between study site and control site. Comparison is focused on distribution pattern of PM and to determine the extent of distance and parameters in influencing its dispersion around the cement plant in Rawang; to measure horizontally particle levels; and to evaluate suspended particle patterns in relation to weather parameters (temperature, wind velocity and moisture). The research design involved use of primary and secondary data. Primary data were obtained from field measurement of PM, PM, temperature, humidity and wind velocity in Rawang (study site) and Batang Kali (control site).There were 11 observation locations each in study site and control site. Secondary data were obtained from the literature, websites and reports. The results showed that distance greatly influenced the dispersion. The dispersion pattern of suspended particles in Rawang differed with parameters; very strong relationship with distance as well as temperature, strong relationship with humidity and weak relationship with wind velocity. Meanwhile Batang Kali showed a different relationship with the parameters; strong relationship with distance as well as temperature, moderate relationship with humidity and weak relationship with wind velocity. In conclusion, the main factor which influenced the dispersion of suspended particle in the study area was distance from the cement plant, whereas in the control site it was humidity.