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Description of Particulate Exposures, by Site
| Pollutant | Classrooma | Central Sitea |
|---|---|---|
| PM2.5, μg/m3 | 5.3 (2.3) | 6.5 (2.7) |
| BC, μg/m3 | 0.27 (0.19) | 0.64 (0.25) |
| Sulfur, μg/m3 | 0.36 (0.18) | 0.50 (0.22) |
| Sin/Soutb | 0.72 (0.14) |
Values expressed as mean (standard deviation).
Sin/Sout: ratio of indoor to outdoor sulfur levels
