This study was aimed to elucidate the cause of odor in a park, which was used for the landfill site about 20 years ago. For this purpose, VOCs concentration was measured using passive sampler at 10 sampling sites around a park for two times (spring and summer). The VOCs concentration measured in summer showed very low concentration and the relative VOCs ratio also showed no special patterns relating with other studies, which was caused to heavy rainfall during the sampling period. However, the relative ratio of toluene concentration of two sampling sites in spring appeared very high relating with other studies. It was thought that the high VOCs concentration in this park was caused not by landfill but by a neighboring painting materials company.

According to the development of GC equipment, it has been possible to analyze the low level of ambient VOCs concentration. In this study, the limit of detection and the limit of quantitation were estimated for two GC equipments of the VOCs analysis, which would contribute to improve the quality of VOCs analysis results. The results of %RSD for ten standard solutes showed a great reproducibility in terms of detection time and detection area. The limit of detection and the limit of quantitation in SRI GC appeared to be 0.175 ppb and 0.583 ppb for benzene, and 0.223 ppb and 0.743 ppb for toluene, respectively. On the other hand, The limit of detection and the limit of quantitation in FISON GC appeared to be 0.149 ppb and 0.496 ppb for benzene, and 0.094 ppb and 0.313 ppb for toluene, respectively.