| Workplace | Monitor | Results |
| Background in a break room close to maintenance hangar (no known emission sources near the room) | RTM | 0.97–40 ng·m−3 Negligible The monitors all agreed qualitatively |
| Downwind measurements during four engine run-up test on flight tarmac | RTM | Maximum output of the monitor: 4000 ng·m−3 (high-idle engine test) |
| IAS | PAH vapour phase dominated by naphthalene, and alkyl-substituted naphthalenes# PAH particulate phase <LD except benzo[a]pyrene and pyrene | |
| Maintenance hangar, first step: minimal flight and ground-support activity (maintenance hangar background) | RTM | Negligible (similar to the break room) |
| IAS | PAH vapour phase dominated by naphthalene and alkyl-substituted naphthalenes# PAH particulate phase <LD | |
| Maintenance hangar, second step: doors opened; aircraft engine exhaust was directed toward the door of the maintenance hangar | RTM | PAHs were 10 times higher than in the break room, eight times higher than those recorded earlier in the maintenance hangar (first step), approximately equal to the average indoor PAH concentrations in residences in a major city |
| IAS | Vapour PAHs were two times greater than in the maintenance hangar (first step) PAH particulate phase <LD | |
| Downwind from aerospace ground equipment | RTM | The response reached a maximum at the AGE units start and shut off 20 times greater than the background levels, 10 times higher than in the maintenance hangar (first step), 3.5 times higher than during the four-engine run-up test |
| IAS | New vapour PAHs were detected: methyl substituted phenanthrenes, anthracenes, fluoranthene and pyrene PAHs particulate phase <LD |
RTM: real time measurements; IAS: integrated air sampling associated with chemical analysis; LD: limit of detection; AGE: aerospace ground environment. #: present in the greatest quantities. Data from [23].