Chrysotile | Lower positive concentration* (μg/cm2) or highest tested (for negative samples) | Number of fibers/cm2(x 106) | Number of fibers/cm2 | Number of fibers/cm2 |
---|---|---|---|---|
>5 μm L | (x 106) | (x 106) | ||
< 2 μm Ø (Pott’s criteria) | <5 μm L* | (Stanton’s criteria) | ||
“Positive” samples | ||||
Calidria | 0.5 | 4.8 | 19.6 | 1.5 |
NIEHS | 0.5 | 1.2 | 3.1 | 0.4 |
UICCA | 0.5 | 0.8 | 10.2 | 0.3 |
4.4.3 | 1.0 | 1.1 | 15.9 | 0.3 |
4.4.5 | 1.0 | 1.8 | 14.2 | 1.0 |
SF | 1.0 | 0.4 | 3.9 | 0.2 |
P3 | 1.0 | 1.3 | 3.7 | 0.66 |
Pmilled | 2.0 | 3.7 | 9.3 | 2.1 |
“Negative” samples | ||||
Ox89% | 2.0 | 0.2 | 3.7 | 0.06 |
SCF | 1.5 | 0.66 | 21.8 | 0.22 |