Table 3.
Overall EC and TEM exposures by type and size fraction sampled.
| Sample | EC | TEM | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| n | GM (μg m−3) | GSD | Min. | Max. | 8-h TWA GM (μg m−3) | 8-h TWA GSD | n | GM (s cm−3) | GSD | Min. | Max. | 8-h TWA GM (s cm−3) | 8-h TWA GSD | ||
| All sites combined (n = 14) | PBZ Resp. | 25 | 0.34 | 4.43 | 0.02 | 2.94 | 0.16 | 3.49 | — | — | — | — | — | — | — |
| PBZ Inhal. | 47 | 1.21 | 8.90 | 0.01 | 79.57 | 0.38 | 9.88 | 51 | 0.008 | 11.59 | 0.0001 | 1.613 | 0.003 | 13.68 | |
| AS Resp. | 49 | 0.31 | 4.57 | 0.02 | 6.94 | 0.10 | 4.02 | — | — | — | — | — | — | — | |
| AS Inhal. | 53 | 0.31 | 7.52 | 0.01 | 210.22 | 0.10 | 8.19 | 52 | 0.004 | 7.26 | 0.0001 | 0.631 | 0.001 | 8.39 | |
All EC values have been background corrected. AS, area sample; Resp., respirable size fraction; Inhal., inhalable size fraction; s cm−3, CNT or CNF structures per cubic centimeter.