Table 3.
Within- and between-school variation in indoor VOC concentrations.
| VOC | Percent of Variation (%) | p-Value * | |
|---|---|---|---|
| Within-School | Between-School | ||
| Aromatics | |||
| Benzene | 89.1 | 10.9 | 0.06 |
| Toluene | 91.8 | 8.2 | 0.11 |
| Ethylbenzene | 14.2 | 85.8 | 0.00 |
| p,m-Xylene | 16.5 | 83.5 | 0.00 |
| o-Xylene | 28.6 | 71.4 | 0.00 |
| 1,2,4-TMB | 41.7 | 58.3 | 0.00 |
| BTEX | 83.6 | 16.4 | 0.01 |
| Alkanes | |||
| C6 | 82.0 | 18.0 | 0.01 |
| C7 | 60.9 | 39.1 | 0.00 |
| C11 | 62.4 | 37.6 | 0.00 |
| C12 | 70.0 | 30.0 | 0.00 |
| C13 | 77.9 | 22.1 | 0.00 |
| C14 | 82.2 | 17.8 | 0.00 |
| C15 | 59.2 | 40.8 | 0.00 |
| C16 | 73.3 | 26.7 | 0.00 |
| MCH | 84.3 | 15.7 | 0.01 |
| Alkanes | 69.8 | 30.2 | 0.00 |
| Terpenes | |||
| α-Pinene | 15.7 | 84.3 | 0.00 |
| d-Limonene | 36.1 | 63.9 | 0.00 |
| Terpenes | 25.6 | 74.4 | 0.00 |
| Other | |||
| Ethyl acetate | 58.0 | 42.0 | 0.00 |
| MIBK | 57.5 | 42.5 | 0.00 |
| Naphthalene | 76.7 | 23.3 | 0.00 |
| DCM | 48.6 | 51.4 | 0.00 |
| Chloroform | 52.1 | 47.9 | 0.00 |
| p-DCB | 63.2 | 36.8 | 0.00 |
| Formaldehyde | 37.2 | 62.8 | 0.00 |
| TTVOCs | 35.4 | 64.6 | 0.00 |
Bold values are statistically significant (p < 0.05). * p-value test for the VOC differences between-schools.