Study Subject

Total no. of samples

Before work no. of samples measured lead

%

Before Work

Total no. of samples

After AH no. of samples measured lead

%

AH

Handwashing % lead removal efficiency (mean value) (AWH-AW)

Mean Lead concentration µg/wipe AW

1

9

7

78

9

5

56

94.5

450.7

2

10

5

50

10

5

50

92.8

241.5

3

9

5

56

9

5

56

91.8

399.1

4

10

6

60

10

4

40

86.6

243.7

5

7

3

43

7

5

71

95.0

358.1

6

6

2

33

6

5

83

88.2

232.9

7

4

4

100

4

4

100

93.2

644.1

8

4

4

100

4

4

100

93.1

753.8

Total

59

36

-

59

37

-

-

-