Table 4 Personal VOCs concentrations in the exposed and the controlled areas (Unit: μg/m3)
Exposed area (N = 310, Mean ± SD) | Controlled area (N = 150, Mean ± SD) | Exposed area / Controlled area | p-value | |
|---|---|---|---|---|
Summer | ||||
Toluene | 125.59 ± 230.50 | 27.47 ± 53.83 | 4.57 | < 0.01 |
DMF | 24.14 ± 41.54 | 5.63 ± 4.57 | 4.29 | 0.01 |
Chloroform | 9.03 ± 4.61 | 6.05 ± 4.36 | 1.49 | < 0.01 |
MEK | 4.23 ± 12.34 | N.D.a | N.D. | N.D. |
Benzene | 10.22 ± 6.76 | 6.06 ± 4.25 | 1.69 | < 0.01 |
Ethylbenzene | 17.95 ± 27.08 | 10.46 ± 22.17 | 1.72 | 0.11 |
m,p-Xylene | 13.38 ± 14.83 | 6.55 ± 9.50 | 2.04 | < 0.01 |
o-Xylene | 19.12 ± 15.12 | 11.03 ± 7.73 | 1.73 | 0.73 |
Autumn | ||||
Toluene | 171.59 ± 232.57 | 89.21 ± 77.02 | 1.92 | < 0.01 |
DMF | 21.11 ± 21.26 | 3.62 ± 1.06 | 5.83 | < 0.01 |
Chloroform | 11.18 ± 5.63 | 7.31 ± 2.17 | 1.53 | < 0.01 |
MEK | 13.73 ± 12.10 | 31.74 ± 98.05 | 0.43 | 0.20 |
Benzene | 3.58 ± 2.98 | 2.04 ± 0.64 | 1.75 | < 0.01 |
Ethylbenzene | 2.42 ± 1.59 | 1.98 ± 2.44 | 1.22 | 0.09 |
m,p-Xylene | 10.44 ± 3.65 | 22.59 ± 17.72 | 0.46 | < 0.01 |
o-Xylene | 1.74 ± 0.41 | 6.80 ± 5.69 | 0.26 | 0.01 |