Some Useful Information Concerning the results:

The Conversion factors for the primordial nuclides are given by:

1 Bq 238U/kg = 81 ppb U (81 x 10-9 gU/g)

The 238U decay chain gammas used are:

226Ra: 186.1 keV

214Pb: 295.21 and 351.92 keV

214Bi: 609.31, 1120.29, 1764.49 and 2204.21 keV

The relationships are valid for any daughters in the 238U, 235U or 232Th chain only if the chain is in equilibrium.

1 Bq 232Th/kg = 246 ppb Th (246 x 10-9 gTh/g)

The 232Th decay chain gammas used are:

212Pb: 238.63 and 300.09 keV

208Tl: 583.19 and 2614.53 keV,

228Ac: 911.21 keV

1 Bq 40K/kg = 32300 ppb K (32300 x 10-6 gK/g)

The 40K decay chain gamma used is:

40K: 1460.83 keV

1 Bq 235U/kg = 1.76 ppm U (1.76 x 10-6 gU/g)

The 235U decay chain gammas used are:

235U: 143.76, 163.33 and 205.31 keV

The measurements of the samples below take into account the background measurements. If a measurement is below the background then the upper bound shown is the 90% confidence limit.

SNO Measurements:

SNO 1

UPW passed through bubbler

48.2

2.146

Oct 5, 2006

(mBq/kg)

76.57

+/-

39.65

Note:

No 226Ra Present

105.09

+/-

46.49

N/A

Water Blank

Oct 11, 2006

(ppb)

6.20 ppb

+/-

3.21 ppb

25.85 ppb

+/-

11.44 ppb

SNO 2

Four hour UPW sample passing

50.0

4.882

Nov 3, 2006

(mBq/kg)

23.69

+/-

18.44

Note:

No 226Ra Present

0.03

+/-

16.87

<29.22

N/A

Water Sample

Through radium 226 source

Nov 8, 2006

(ppb)

1.92 ppb

+/-

1.49 ppb

0.01 ppb

+/-

4.15 ppb

<943.94 ppb

SNO 3

757.4

9.803

Apr 12, 2007

(mBq/kg)

0.58

+/-

1.28

1.17

+/-

0.36

1398.86

+/-

86.67

<0.67

1.13

+/-

0.64

MnOx Beads

May 4, 2007

(ppb)

0.05 ppb

+/-

0.10 ppb

0.28 ppb

+/-

0.09 ppb

45.18 ppm

+/-

2.80 ppm

SNO 4

523.3

11.107

May 4, 2007

(mBq/kg)

27.25

+/-

2.51

1502.39

+/-

175.76

67.77

+/-

15.95

9.29

+/-

1.91

120.39

+/-

20.96

0.96

+/-

1.39

<0.48

Lead Pipe from Montreal Water System

May 29, 2007

(ppb)

2.21 ppb

+/-

0.20 ppb

121.69 ppb

+/-

14.24 ppb

119.08 ppb

+/-

28.07 ppb

2.29 ppb

+/-

0.47 ppb

3.89 ppm

+/-

0.68 ppm

SNO 5

Placed on endcap

34.3

6.895

May 29, 2007

(mBq / NCD Piece)

0.82

+/-

0.21

0.814

+/-

1.11

10.036

+/-

11.03

0.513

+/-

0.89

<0.10

54Mn Signal:

NCD K2 Weld Section

Jun 11, 2007

(mBq/kg)

23.91

+/-

2.91

23.62

+/-

32.36

292.71

+/-

321.57

14.87

+/-

25.94

<2.92

0.595 mBq

+/-

0.457 mBq

SNO 6

Placed on endcap inside plastic bag

6.4

5.388

Jun 15, 2007

(mBq/kg)

<1.90

<135.59

<603.35

N /A

N/A

19 1/4" back ferrules

Swagelock

Jun 22, 2007

(ppb)

<0.15 ppb

<33.36 ppb

<19.49 pm

(mBq / ferrule)

<0.0006

<0.0457

<0.2033

SNO 7

Flattened, placed on endcap

34.3

11.660

Aug 1, 2007

(mBq / NCD Piece)

0.20

+/-

0.47

<0.46

<2.21

<0.56

<0.10

NCD K2 Weld Section

Agu 13, 2007

(mBq/kg)

5.83

+/-

13.70

<13.41

<64.43

<16.33

<2.92

SNO 8

Flattened, placed on endcap

59.7

14.099

Sep 11, 2007

(mBq / NCD Piece)

<0.40

5.82

+/-

0.71

2.70

+/-

5.37

0.50

+/-

0.54

<0.15

54Mn Signal:

NCD K2 Weld Section 2

Sep 26, 2007

(mBq/kg)

<6.70

97.46

+/-

11.93

45.23

+/-

89.89

8.38

+/-

9.02

<2.51

0.40 mBq

+/-

0.20 mBq

SNO 9

Flattened, placed on endcap

82.2

15.110

Sep 26, 2007

(mBq / NCD Piece)

<0.15

0.65

+/-

0.44

0.70

+/-

4.92

0.60

+/-

0.54

<0.11

54Mn Signal:

NCD K2 Weld Section 3

Oct 12, 2007

(mBq/kg)

<1.76

8.52

+/-

5.34

8.52

+/-

59.91

7.30

+/-

6.55

<1.24

0.10 mBq

+/-

0.20 mBq

SNO 10

298.4 g

2.118

Jun 2, 2009

(mBq/kg)

18.75

5.48

<3.56

16.09

40.35

1.68

3.75

<0.97

Polypropylene Pipe

Jun 4, 2009

(ppb or ppm)

1.52 ppb

0.44 ppb

<0.87 ppb

519.57 ppb

1303.43 ppb

SNO 11

This sample of polypropylene pipe as been soaked in a KCl water solution

298.4 g

3.761

Jun 4, 2009

(mBq/kg)

8.11

3.50

52.15

6.29

<7.84

2.01

2.76

<0.26

228Ac Signal:

Polypropylene Pipe

to determine if Poly Pipe absorbs any of the Potassium.

Jun 8, 2009

(ppb or ppm)

0.66 ppb

0.28 ppb

12.83 ppb

1.55 ppb

<253.27 ppb

<0.65 mBq/kg

<0.16 ppb

In Progress and To Be Measured: