Sample no.

NORM Concentration (Bq/g)

Ra-226

Ra-228

Ra-224

K-40

1

97 ± 3

81 ± 1

55 ± 3

13 ± 2

2

132 ± 1

77 ± 1

63 ± 1

11 ± 1

3

174 ± 1

101 ± 2

67 ± 2

16 ± 2

4

163 ± 2

65 ± 1

46 ± 1

7 ± 1

5

88 ± 1

89 ± 1

53 ± 1

9 ± 1

6

103 ± 2

109 ± 4

48 ± 2

12 ± 1

7

99 ± 1

111 ± 1

51 ± 1

13 ± 2

8

118 ± 2

84 ± 2

62 ± 1

10 ± 1

9

126 ± 2

79 ± 1

57 ± 3

6 ± 1

10

178 ± 1

94 ± 2

52 ± 1

8 ± 1