Sample A:
Variable | Lab 1 | Lab 2a | Lab 2b | Lab 3 |
Alpha activity (Bq/l ) | - | 5,19 | 5,19 | 3,70 |
Beta activity (Bq/l ) | - | 1,63 | 1,63 | 6,30 |
Uranium-238 | 3100 mBq/l
(250 ppb*) |
2,49 mBq/l | 2490 mBq/l | 2000 mBq/l |
Uranium-235 | 96 mBq/l
(1,2 ppb) |
0,113 mBq/l | 113 mBq/l | 92,8 mBq/l |
Thorium-232 | <4 mBq/l
(<1ppb) |
<2,58 mBq/l | <2,58 mBq/l | 1,5 mBq/l |
Radium-224 | - | -0,00354 mBq/l | -3,54 mBq/l | <1,2 mBq/l |
Radium-226 | - | 0,373 mBq/l | 373 mBq/l | 156 mBq/l |
* 1ppb U-238 = 12,4 mBq/l
1ppb U-235 = 79,7 mBq/l
1ppb Th-232 = 4,0 mBq/l
Sample B:
Variable | Lab 1 | Lab 2a | Lab 2b | Lab 3 |
Alpha activity (Bq/l ) | - | 4,07 | 4,07 | 2,90 |
Beta activity (Bq/l ) | - | 0,625 | 0,625 | 6,80 |
Uranium-238 | 1984 mBq/l
(160 ppb*) |
1,84 mBq/l | 1840 mBq/l | 1490 mBq/l |
Uranium-235 | 56 mBq/l
(0,7 ppb) |
0,0832 mBq/l | 83,2 mBq/l | 70,6 mBq/l |
Thorium-232 | <4 mBq/l
(<1ppb) |
<2,58 mBq/l | <2,58 mBq/l | 1,5 mBq/l |
Radium-224 | - | 0,0561 mBq/l | 56,1 mBq/l | <1,4 mBq/l |
Radium-226 | - | 0,156 mBq/l | 156 mBq/l | 42,7 mBq/l |
* 1ppb U-238 = 12,4 mBq/l
Sample C:
Variable | Lab 1 | Lab 2a | Lab 2b | Lab 3 |
Alpha activity (Bq/l ) | - | 0,0550 Bq/l | 0,0550 Bq/l | <0,66 |
Beta activity (Bq/l ) | - | 0,226 Bq/l | 0,226 Bq/l | 2,70 |
Uranium-238 | 30 mBq/l
(2,4 ppb*) |
0,0571 mBq/l | 57,1 mBq/l | 31,7 mBq/l |
Uranium-235 | <8 mBq/l
(<0,1 ppb) |
0,00259 mBq/l | 2,59 mBq/l | 1,4 mBq/l |
Thorium-232 | <4 mBq/l
(<1ppb) |
<2,58 mBq/l | <2,58 mBq/l | 1,5 mBq/l |
Radium-224 | - | 0,648 mBq/l | 648 mBq/l | <5,3 mBq/l |
Radium-226 | - | 0,227 mBq/l | 227 mBq/l | <4,2 mBq/l |
* 1ppb U-238 = 12,4 mBq/l