Table 1. Description of participants and measurements.
| Total N = 30 | Baggage handlers (n = 6) | Catering drivers (n = 7) | Cleaning staff (n = 8) | Airside security (n = 7) | Landside security (n = 2) | |
| Gender | ||||||
| Male n | 26 | 6 | 7 | 8 | 5 | 0 |
| Female n | 4 | 0 | 0 | 0 | 2 | 2 |
| Measurement in minutes mean | 293 | 271 | 301 | 316 | 279 | 294 |
| Stay on apron/non-apron in minutes (%) | ||||||
| Apron | 3 849 | 1 231 (75.6) | 738 (35.0) | 1 554 (61.5) | 273 (14.0) | 54 (9.0) |
| Non-apron | 4 954 | 396 (24.4) | 1 368 (65.0) | 975 (38.5) | 1 680 (86.0) | 535 (91.0) |
| Place of stay in minutes (%) | ||||||
| Apron | ||||||
| Indoors | 1 924 | 669 (41.1) | 137 (6.5) | 955 (37.8) | 110 (5.6) | 54 (9.2) |
| Outdoors | 1 643 | 511 (31.4) | 516 (24.5) | 499 (19.7) | 117 (6.0) | 0 (0.0) |
| In-vehicle | 282 | 51(3.1) | 85 (4.0) | 100 (4.0) | 46 (2.4) | 0 (0.0) |
| Non-apron | ||||||
| Indoors | 2 991 | 351 (21.6) | 351 (16.7) | 727 (28.7) | 1 043 (53.4) | 519 (88.3) |
| Outdoors | 1 361 | 35 (2.2) | 792 (37.6) | 134 (5.3) | 384 (19.7) | 16 (2.7) |
| In-vehicle | 602 | 10 (0.6) | 225 (10.7) | 114 (4.5) | 252 (12.9) | 0 (0.0) |
| UFP size (nm) median (min.-max.) a | 37 (17–146) | 38 (18–104) | 33 (19–110) | 37 (17–118) | 39 (18–146) | 47 (27–105) |
| UFP (103/cm3) apron/non-apron median (Q1–Q3) | ||||||
| Apron | 27 (10–67) | 28 (12–71) | 43 (13–110) | 23 (7–51) | 33 (9–99) | 5 (4–6) |
| Non-apron | 8 (3–17) | 23 (9–42) | 10 (6–18) | 4 (1–11) | 8 (4–18) | 3 (2–6) |
| UFP (103/cm3) by place median (Q1–Q3) | ||||||
| Apron | ||||||
| Indoors | 22 (8–45) | 22 (12–38) | 34 (11–112) | 22 (6–47) | 32 (7–75) | 5 (4–6) |
| Outdoors | 37 (11–103) | 45 (13–144) | 50 (14–114) | 23 (8–61) | 48 (12–167) | N/Ab |
| In-vehicle | 32 (14–80) | 68 (26–197) | 29 (19–73) | 31 (19–67) | 20 (8–71) | N/Ab |
| Non-apron | ||||||
| Indoors | 6 (3–14) | 23 (9–40) | 12 (7–17) | 2 (1–6) | 7 (3–17) | 3 (2–6) |
| Outdoors | 10 (5–20) | 26 (12–96) | 9 (6–18) | 9 (3–18) | 11 (6–24) | 4 (4–5) |
| In-vehicle | 11 (4–21) | N/Ab | 10 (5–20) | 17 (7–26) | 9 (2–17) | N/Ab |
a
1% of the measurements were >100 nm.
b
<50 observations.