Radium-228, via Gas Flow Proportional Counting method
Collection Date	Location	Ra-228  pCi/L	Uncertainty  ±pCi/L	MDA  pCi/L
06/06/05	WB 2	0.9640	0.8200	1.3600
07/28/05	WB 2	0.6420	0.6760	1.1300
10/25/05	WB 2	1.0000	0.7710	1.2700
12/04/05	WB 2	1.6000	0.8900	1.4400
08/03/06	WB 2	0.3000	0.7700	1.3000
09/24/06	WB 2	0.4500	0.9100	1.5000
07/10/07	WB 2	0.0000	0.4600	0.8200
10/16/07	WB 2	0.2400	0.5200	0.8700
11/21/07	WB 2	0.0000	0.4100	0.7300
05/12/08	WB 2	0.0000	0.4600	0.9100
Background		7.2