Table 2.
Characteristic | Basement Winter Short-Term Electret Ion Chamber Test |
Basement Annual Alpha Track Test |
Difference | Short-Term - Annual | |
---|---|---|---|
Geometric Mean (GSD) | 199 (2.0) | 181 (2.0) | 34 (3.6) |
Range | 42 – 1331 | 32 – 1787 | 0.39 – 738 |
25th Percentile | 129 | 110 | 19 |
Median | 185 | 186 | 38 |
75th Percentile | 297 |
266 |
74 |
≥ 148 Bq m−3 | 63% | 60% |