Table 1 The distribution of respirable free silica dust exposure and assignment of weighting factors among workers with various job titles

Administration

15

0.001

0.001

0.001

0.96

0.3

1.5

Research and Development

4

0.001

0.001

0.001

2.63

1

4.5

Quality Control

2

0.029

0.001

0.056

0.9

0.3

1.5

Vacuum Press Machine Operator

4

0.175

0.099

0.2

4.5

1.5

7.5

Facility Management

15

0.325

0.001

0.622

2.13

0.6

10

Grinding Machine Operator

8

0.449

0.168

0.767

4.88

3

7.5

Operations Supervisor

4

0.57

0.415

0.622

5

1

10

Cutting Machine Operator

3

0.587

0.587

0.587

3.92

0.75

8

Raw Material Operator

10

2.878

0.27

4.44

7.8

4

10