| Site | I (nSv/h) | Standard deviation (nSv/h) | Relative error (%) |
| S1 | 94.5 | 3.1 | 3.3 |
| S2 | 71.2 | 3.9 | 5.5 |
| S3 | 39.4 | 3.2 | 8.1 |
| S4 | 54.6 | 3.2 | 5.9 |