Table 20 Representative workday sample airborne fiber concentrations in the Melt Shop department grouped by job category (1972–2006).

From: Occupational exposure to asbestos in the steel industry (1972–2006)

   

Fiber Concentration by PCM (fibers/cc)

Job Title

Time Period

n

Mean

SD

95th percentile

Max

PEL

Crane/Forklift Operator

1986–1993

3

0.003

0.006

0.2

Mechanical Maintenance

Overall

5

0.04

0.03

0.08

 

1976–1985

3

0.06

0.08

2

1986–1993

2

0.01

0.02

0.2

Moldman

Overall

12

3.06

3.12

10.00

 

1972–1975

11

3.34

3.11

10.00

5

1976–1985

1

0.01

0.01

0.2

Motor Inspector

1976–1985

2

0.91

1.36

2

Melt Shop Operator

1976–1985

2

0.49

0.96

2

Oversight

Overall

7

0.02

0.02

0.06

 

1976–1985

4

0.002

0.004

2

1994–2006

3

0.05

0.06

0.1

  1. Empty (–) values were not calculated because the number of samples were deemed too low. Standard deviations were calculated for all samples with an n of 5 or greater. 95th percentiles were calculated for n of 20 or greater.