| Thorium-228, via Alpha Spectroscopy method | |||||||||
| Collection Date | Location | Th-228 pCi/L | Uncertainty ąpCi/L | MDA pCi/L | |||||
| 06/06/05 | WB 2 | 0.1660 | 0.1640 | 0.2420 | |||||
| 07/28/05 | WB 2 | 0.0560 | 0.0338 | 0.0153 | |||||
| 10/25/05 | WB 2 | 0.0489 | 0.0618 | 0.0899 | |||||
| 12/04/05 | WB 2 | 0.0443 | 0.0506 | 0.0815 | |||||
| 08/03/06 | WB 2 | 0.0700 | 0.1500 | 0.2300 | |||||
| 09/24/06 | WB 2 | 0.0000 | 0.1700 | 0.3800 | |||||
| 07/10/07 | WB 2 | 0.0000 | 0.3000 | 0.6500 | |||||
| 10/16/07 | WB 2 | 0.0020 | 0.1000 | 0.2300 | |||||
| 11/21/07 | WB 2 | 0.1100 | 0.2400 | 0.4000 | |||||
| 05/12/08 | WB 2 | 0.0000 | 0.0910 | 0.2800 | |||||
| Background | 7.2 | ||||||||
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