Table 1.
The median (M), arithmetic mean (AM), geometric mean (GM), standard deviation (SD), and low limit of detection (LLD) of the specific radioisotope activity measured in all 61 samples.
| Radionuclide | M | AM | GM | SD | LLD |
|---|---|---|---|---|---|
| Bq kg−1 | |||||
| 40K | 14 | 24 | 15 | 47 | 0.6–1.1 |
| 137Cs | 4 | 7 | 4 | 6 | 0.02–0.11 |
| 208Tl | 1 | 1 | 1 | 1 | 0.03–0.1 |
| 210Pb | 28 | 33 | 28 | 17 | 0.46–1.1 |
| 212Bi | 3 | 3 | 3 | 3 | 0.07–0.11 |
| 212Pb | 2 | 2 | 2 | 2 | 0.05–0.12 |
| 214Bi | 10 | 11 | 10 | 7 | 0.06–0.15 |
| 214Pb | 10 | 11 | 10 | 5 | 0.07–0.3 |
| 226Ra | 50 | 53 | 52 | 13 | 0,38–1.56 |
| 228Ac | 2 | 2 | 2 | 2 | 0.09–0.21 |
| 234Th | 40 | 47 | 41 | 25 | 0.61–1.99 |