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Exposure to fine particulate matter (PM 2.5 ) in both the short and long term has been known to cause deaths and health effects, especially related to the heart, blood vessels, and lungs. Based on this information, researchers conducted this study at a motor vehicle testing center unit at Pulo Gadung, in Jarkarta, to determine the concentration of PM 2.5  that workers were exposed to. The major source of PM 2.5  in this area is from the exhaust of gas emissions from motor vehicles, which is one of the largest contributors to the levels of PM in urban areas. Ten mechanics were picked from 16 mechanics that work in this station. Four administration workers from different posts were also picked to participate. The researcher conducted the PM 2.5  personal exposure measurement during weekdays from 6 to 14 April 2015 (2 workers/day). This research was conducted to measure the particle number concentration with size &lt;2.5 μm. The average personal exposure concentrations of PM 2.5  in the study period received by the group of mechanics amounted to 149.01 μm/m 3  while the administrative officer group that consisted of four administrative workers were exposed to an average of 103.28 μm/m 3 . Once converted and compared with the World Health Organization Air Quality Guidelines, the PM 2.5  exposure of the mechanics and administrative officers exceeded the recommended exposure (25 μm/m 3 ).

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Particulate matter 2.5 (PM 2.5 ) personal exposure evaluation on mechanics and administrative officers at the motor vehicle testing center at Pulo Gadung, DKI Jakarta