Table 3 Personal, indoor and outdoor concentrations of xylene ( μg/m³) in the six periods

1^st – SEP

89.4

84.6

53.5–141.9

49.6

48.4

20.3–79.6

101.5

88.3

41.4–263.0

2^nd – DEC

75.9

71.6

49.1–113.8

56.4

39.7

22.1–117.0

85.6

74.6

28.0–180.5

3^rd – FEB

74.5

63.8

39.7–141.3

42.7

39.2

16.9–67.9

85.6

75.8

41.2–197.9

4^th – APR

83.1

63.2

30.7–147.7

45.7

37.1

18.7–92.9

71.5

63.0

23.2–167.4

5^th – JUN

60.7

56.0

26.6–97.5

32.3

27.4

16.2–49.4

64.0

53.3

21.1–160.9

6^th – SEP

75.5

63.9

38.2–122.8

36.5

31.9

20.9–51.5

88.8

76.4

35.4–229.2

Annual

76.6

67.4

37.8–123.3

43.7

36.2

19.5–72.9

82.8

72.3

21.1–263.0