TABLE 4.
Duct material | Resuspension rate (1/s)
|
Resuspension factor (1/cm)
|
||
---|---|---|---|---|
Immediate | After 5 h | Immediate | After 5 h | |
Steel | 5.56 × 10−4 | 3.17 × 10−5 | 1.35 × 10−6 | 1.77 × 10−7 |
Plastic | 2.24 × 10−3 | 4.26 × 10−5 | 8.89 × 10−6 | 5.50 × 10−7 |
Data represent the averages of several tests.