Interim Baseline Radiological Investigation Report in
Support of the Upton Rare Earth Processing Plant
November 15, 2012
31
8.1. Radionuclide Concentrations in Filters
Location
Concentration
Lower Limit of Detection
Start Date
End Date
U-nat
(µg f
-1
)
Th-230
(pCi f
-1
)
Th-230 error ±
2σ
Ra-226
(pCi f
-1
)
Ra-226 error ±
2σ
Th-nat
(µg f
-1
)
U-nat
(µg f
-1
)
Th-230
(pCi f
-1
)
Ra-226
(pCi f
-1
)
Th-nat
(µg f
-1
)
AMS-01
6/12/2012
6/15/2012
1
0.95
0.48
1.0
0.5
6
0.00008
0.55
0.5
0.02
6/21/2012
7/5/2012
3
2.30
0.74
2.9
0.7
11
0.00008
0.65
0.6
0.02
7/12/2012
7/26/2012
2
1.30
0.52
2.1
0.7
6
0.00008
0.49
0.7
0.02
AMS-02
6/12/2012
6/21/2012
1
1.2
0.6
1.1
0.5
3
0.00008
0.65
0.5
0.02
6/28/2012
7/12/2012
2
1.3
0.5
1.2
0.5
6
0.00008
0.53
0.6
0.02
AMS-04
6/12/2012
6/28/2012
2
0.73
0.46
1.6
0.6
4
0.00008
0.63
0.6
0.02
7/5/2012
7/19/2012
1
1.20
0.49
1.3
0.6
3
0.00008
0.45
0.6
0.02
Notes:
pCi f
-1
= picocuries per filter
Ra-226 = radium-226
σ = standard deviation
Th-230 = thorium-230
Th-nat = natural thorium
U-nat = natural uranium
µg f
-1
= micrograms per filter
