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Table 2 Ambient temperature and summary statistics for PCB concentrations (ng/m3) in indoor air of classrooms of an elementary school over a 14-month period

From: Mitigation of building-related polychlorinated biphenyls in indoor air of a school

Sample Date

Temperature (Celsius)

AER

(h-1)

N

Mean

Standard Deviation

Coefficient

Of Variation

Min

Max

11/4/2010

9.3

2.0

1

105

--

--

105

105

11/11/2010

8.7

2.8

7

83

40.5

48.8

12

128

11/20/2010

9.7

2.4

8

103

40.6

39.7

25

142

11/24/2010

6.7

2.9

2

94

58.0

61.9

53

135

12/2/2010

1.7

4.3

1

109

--

--

109

109

2/23/2011

1.8

3.1

5

101

27.2

26.9

76

146

4/20/2011

6.0

2.4

3

109

23.9

22.0

93

136

4/21/2011

11

2.0

3

84

46.6

55.5

44

135

5/21/2011

22

3.6

8

167

44.8

26.8

103

224

6/9/2011

27

3.1

3

276

117.5

42.6

152

386

7/13/2011

28

3.6

3

275

87.3

31.8

175

337

7/14/2011

22

2.9

3

99

69.7

70.3

43

177

10/7/2011

14

3.8

8

79

21.0

26.6

52

114

12/29/2011

-2.1

2.8

10

56

20.9

37.5

11

85

  1. N = number of observations; Min = minimum concentration; Max = maximum concentration