Fig. 1 shows the abundances of the major VOC species at the two temples during peak and
non-peak periods. Within the expectation, the species of
VOCs detected during peak period were more than those
during non-peak period. The total concentrations of the
detected VOC species measured during peak period
(870±63 μg m−3 for Temple 1, 260±17 μg m−3 for
Temple 2 indoor site, and 39±4.9 μg m−3 for Temple 2
outdoor site) were much higher than non-peak period
(52±7.1 μg m−3 for Temple 1, 23±2.1 μg m−3 for
Temple 2 indoor site, and 9.8±1.0 μg m−3 for Temple 2
outdoor site). In addition, the average VOC concentrations
at outdoor sampling location at Temple 2 were
much lower than those at the indoor one, which was
similar to the situation of carbonyl compounds.
The recommended benzene and toluene levels
according to IAQO Good Class are 16.1 μg m−3 and
1092 μg m−3, respectively. The benzene concentrations
obtained during peak period at both Temple 1 (146±
14 μg m−3) and indoor sampling location of Temple 2
(84±7.4 μg m−3) were significantly higher than the
standard. Especially at Temple 1 during peak period, the
average benzene concentration exceeded almost 8 times