Section 1.
SCHEDULE 1U.K. Specified elements
| Element | Becquerels per gram (BQ G-1) | ||
|---|---|---|---|
| Solid | Liquid | Gas or Vapour | |
| 1. Actinium | 0.37 | 7.40 × 10-2 | 2.59 × 10-6 |
| 2. Lead | 0.74 | 3.70 × 10-3 | 1.11× 10-4 |
| 3. Polonium | 0.37 | 2.59 × 10-2 | 2.22 × 10-4 |
| 4. Protoactinium | 0.37 | 3.33 ×10-2 | 1.11 × 10-6 |
| 5. Radium | 0.37 | 3.70 × 10-4 | 3.70 × 10-5 |
| 6. Radon | 3.70 × 10-2 | ||
| 7. Thorium | 2.59 | 3.70 × 10-2 | 2.22 × 10-5 |
| 8. Uranium | 11.1 | 0.74 | 7.40 × 10-5 |