Table 2.
Source characterization of source emissions.
| Sampling Location a | PM-2.5 (μg/m3) | VOC (μg/m3) | Formaldehyde (μg/m3) | |||
|---|---|---|---|---|---|---|
| Helicopter | Diesel-Fueled Power Supply | Helicopter | Diesel-Fueled Power Supply b | Helicopter | Diesel-Fueled Power Supply | |
| Reference | 29 | 13.7 | <0.10 | 9.7 b | 4.5 | 26.5 |
| A | 86 | 67.2 | <0.21 | 154 c | 85 | 81.6 d |
| B | 66 | 1141 | <0.16 | 28.5 c | 66 | 135 |
| C | 36 | 2586 | <0.16 | 29.3 c | 36 | 71.2 |
a Helicopter: Reference—20 m; A—7.5; B—9.5; C—11.5 m; Diesel power supply: Reference—20 m; A—2.5; B—4.5; C—6.5 m; b Only toluene was identified; c VOC identified, benzene, n-decane, n-undecane, n-dodecane and toluene; d In addition 0.9 μg/m3 acrolein.