Table 10. Summary
Statistics for Radionuclide Activity Concentrations
in Sediment Samples from Three Regional Reservoirs
|
|
Activity Concentration
(mBq g-1)
|
Brantley Lake
|
Red Bluff Reservoir
|
Lake Carlsbad
|
Radionuclide
|
aN
|
bMean
|
cSE
|
dCV (%)
|
N
|
Mean
|
SE
|
CV (%)
|
N
|
Mean
|
SE
|
CV (%)
|
|
239,240Pu
|
4
|
0.26
|
0.02
|
12
|
4
|
0.36
|
0.07
|
39
|
4
|
0.13
|
0.03
|
49
|
|
228Th
|
4
|
37.25
|
3.08
|
17
|
4
|
34.80
|
0.81
|
5
|
4
|
22.10
|
2.32
|
21
|
|
230Th
|
4
|
44.23
|
7.36
|
33
|
4
|
32.80
|
1.17
|
7
|
4
|
23.78
|
2.27
|
19
|
|
232Th
|
4
|
37.48
|
4.40
|
23
|
4
|
30.03
|
1.43
|
10
|
4
|
22.38
|
2.13
|
19
|
|
234U
|
4
|
53.48
|
5.06
|
19
|
4
|
79.23
|
11.62
|
29
|
4
|
38.63
|
2.78
|
14
|
|
235U
|
4
|
1.96
|
0.20
|
21
|
4
|
2.57
|
0.35
|
27
|
4
|
1.39
|
0.07
|
11
|
|
238U
|
4
|
38.83
|
1.82
|
9
|
4
|
49.10
|
6.11
|
25
|
4
|
27.50
|
1.40
|
10
|
aN = number of samples included in calculations
bMean = arithmetic mean
cSE = standard error of mean
dCV = coefficient of variation; standard deviation
expressed as percentage of the mean; CVs may reflect small rounding error
|
|
