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Table 4
Summary of annual radon concentration in buildings with different types of building materials.
| Building materials | ||||
|---|---|---|---|---|
| Sandcrete | Concrete | Brick | Wooden | |
| NR | 122 | 86 | 11 | 6 |
| Range (Bq/m3) | 16.8–427.5 | 18.5–533.7 | 28.4–58.4 | 13.6–18.4 |
| Median | 27.6 | 140.6 | 44.6 | 15.6 |
| AM | 42.8 ± 2.6 | 160.1 ± 7.8 | 44.4 ± 3.2 | 15.7 ± 1.7 |
| GM | 30.9 | 126.6 | 43.6 | 15.6 |
| GSD | 1.4 | 5.3 | 2.2 | 1.1 |
| % NR > 100 | 35 | 40 | 0 | 0 |
| % NR > 200 | 22 | 31 | 0 | 0 |
| % NR > 400 | 0 | 11 | 0 | 0 |
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