SKC Limited Haz-Dust IV - Manual (Page 79)

Appendix B
Particle Size Selections
Introduction The tables below show the particle size cut point for Thoracic, Inhalable, and
Respirable dust particles.
Inhalable
Particle
Aerodynamic
Diameter ( µm)
Inhalable
Particulate Mass
(IPM) (%)
0 100
1 97
2 94
5 87
10 77
20 65
30 58
40 54.5
50 52.5
100 50
Respirable
Particle
Aerodynamic
Diameter ( µm)
Respirable
Particulate Mass
(RPM) (%)
0 100
1 97
2 91
3 74
4 50
5 30
6 17
7 9
8 5
10 1
Thoracic
Particle
Aerodynamic
Diameter ( µm)
Thoracic
Particulate Mass
(TPM) (%)
0 100
2 94
4 89
6 80.5
8 67
10 50*
12 35
14 23
16 15
18 9.5
20 6
25 2
* Same cut point as EPA PM-10.
B - 1