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

Background Measurements of the Vue des Alpes Detector

Sample Description

Manufacturer

Mass (g)

Live Time (days)

Run Numbers

Counting Dates
(if applicable)

Background 1

Efficiency assumes no samples

36.187

171213
171218

Dec 13, 2017

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Completely Empty Detector

Jan 19, 2018

(mBq)

1.87

0.17

5.04

1.61

0.061

0.052

1.35

0.17

15.26

1.93

0.201

0.096

0.063

0.054

Results:

210Pb:

7Be:

54Mn:

228Ac:

(mBq)

76.66

14.04

<0.67

<0.081

0.88

0.26

Background 2

Efficiency assumes no samples

17.497

180212

Feb 12, 2018

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Completely Empty Detector

Mar 2, 2018

(mBq)

1.32

0.22

3.73

2.32

0.233

0.076

0.79

0.22

18.39

2.84

0.392

0.159

0.024

0.082

Results:

210Pb:

7Be:

54Mn:

228Ac:

(mBq)

101.72

20.73

<0.98

<0.12

1.03

0.37

Background 3

Efficiency assumes no samples

51.750

180319
180417

Mar 18, 2018

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Completely Empty Detector

May 12, 2018

(mBq)

2.23

0.15

4.95

1.39

0.140

0.046

1.274

0.133

17.11

1.74

0.433

0.090

<0.068

Results:

210Pb:

7Be:

54Mn:

228Ac:

(mBq)

101.15

12.63

0.50

0.55

0.075

0.065

1.21

0.22

Background 4

Efficiency assumes no samples

82.542

180522
18053001
180801

May 22, 2018

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Completely Empty Detector

Aug 12, 2018

(mBq)

2.05

0.12

6.24

1.17

0.124

0.034

1.328

0.114

15.52

1.39

0.319

0.067

0.122

0.037

Results:

210Pb:

7Be:

54Mn:

228Ac:

(mBq)

79.59

9.88

0.73

0.46

0.040

0.047

1.13

0.18

Background 5

Efficiency assumes no samples

76.532

190910
190914
190915

Sep 10, 2019

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Completely Empty Detector

Nov 28, 2019

(mBq)

2.04

0.12

6.37

1.19

0.133

0.035

1.164

0.116

16.22

1.45

0.385

0.076

0.097

0.039

Results:

210Pb:

7Be:

54Mn:

228Ac:

(mBq)

82.07

10.15

0.48

0.44

<0.052

1.48

0.19

Background 6

Efficiency assumes no samples

55.304

200324
200430

Mar 24, 2020

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Completely Empty Detector

May 19, 2020

(mBq)

3.40

0.18

7.80

1.57

0.154

0.043

2.40

0.17

29.09

2.38

0.25

0.09

0.032

0.050

Results:

210Pb:

7Be:

54Mn:

228Ac:

(mBq)

191.42

21.95

0.49

0.55

0.043

0.060

2.09

0.26

Background 7

Efficiency assumes no samples

7.257

210111
210119

Jan 11, 2021

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Completely Empty Detector

Jan 20, 2021

(mBq)

2.06

0.38

8.57

3.77

0.22

0.11

1.14

0.37

29.32

5.23

0.36

0.23

<0.12

Results:

210Pb:

7Be:

54Mn:

228Ac:

(mBq)

172.52

44.42

<1.55

<0.21

1.73

0.60

Combined Background

Combined Backgrounds of Runs 1+2+3+4+5

238.322

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Completely Empty Detector

Efficiency assumes no samples

(mBq)

2.414

0.094

6.61

0.85

0.333

0.060

1.534

0.082

18.65

1.22

0.405

0.052

0.151

0.026

Results:

210Pb:

7Be:

54Mn:

228Ac:

(mBq)

99.20

7.71

0.32

0.33

0.006

0.034

1.394

0.041

Completed Sample Measurements Counted on the Vue des Alpes Detector

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

SNOLAB Measurements:

Sample Description

Manufacturer

Mass (g)

Live Time (days)

Run Numbers

Counting Dates
(if applicable)

SNOLAB V01

Background is NOT subtracted

20.583

170901

Sep 1, 2017

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Acrylic Sample Beaker H

Efficiency assumes no samples

Sep 22, 2017

(mBq)

1.44

0.15

0.18

0.73

0.354

0.104

0.80

0.11

7.89

1.32

0.197

0.082

0.040

0.048

Results:

210Pb:

7Be:

54Mn:

228Ac:

(mBq)

32.62

5.26

0.38

0.56

<0.052

0.46

0.20

SNOLAB V01A

Background Subtracted

20.853

170901

Sep 1, 2017

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Acrylic Sample Beaker H

Efficiency assumes no samples

Sep 22, 2017

(mBq)

0.29

0.14

<0.095

0.149

0.105

0.01

0.12

<0.26

<0.096

0.012

0.050

Results:

210Pb:

7Be:

54Mn:

228Ac:

(mBq)

12.81

5.10

0.38

0.56

<0.052

<0.082

SNOLAB V02

Lot No. A4B8 02/20

1871.5 g

6.979

180511

May 11, 2018

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Alconox

Alconox Inc.

May 18, 2018

(mBq/kg)

184.60

4.64

104.50

18.43

5.73

0.54

139.50

4.39

8664.00

446.70

<0.65

0.81

0.79

(ppb or ppm)

14.95 ppb

0.38 ppb

8.46 ppb

1.49 ppb

10.08 ppb

0.95 ppb

34.32 ppb

1.08 ppb

279.85 ppm

14.43 ppm

Results:

210Pb:

7Be:

54Mn:

228Ac:

(mBq/kg)

<79.93

5.61

5.46

<1.21

61.58

3.48

(ppb or ppm)

<6.47 ppb

15.15 ppb

0.86 ppb

SNOLAB V03

Sterling AP 308/3-8L, AWS E308-16, E308L-16

2294.9 g

3.910

180518

May 18, 2018

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Premium Welding Electrodes --- Calibration

McKay Welding Products, Troy, Ohio, Lot No 24L056, Heat No. 738228

May 22, 2018

(mBq/kg)

32330.00

564.60

15260.00

854.50

1110.00

24.75

4810.00

116.10

261860.00

13380.00

<1.68

<6.29

(ppb or ppm)

2.62 ppm

0.05 ppm

1.24 ppm

0.07 ppm

1.95 ppm

0.04 ppm

1.18 ppm

0.03 ppm

8458.08 ppm

432.17 ppm

Results:

210Pb:

7Be:

54Mn:

228Ac:

(mBq/kg)

414.69

1085.00

4376.00

120.20

(ppb or ppm)

33.59 ppb

87.89 ppb

1.08 ppm

0.03 ppm

SNOLAB V04

Sources prepared on Nov 21, 2019

4.4 g

12.638

191128

Nov 28, 2019

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Calibration Source Wipes

The Kimwipes are from sources SRS-19-004

Standard Background Subtraction Using Combined Backgrounds

Dec 11, 2019

(mBq/kg)

455.60

79.18

1335.00

733.50

12.51

22.94

300.50

76.03

5534.60

1118.00

<48.00

11.39

31.69

(ppb or ppm)

36.9 ppb

6.41 ppb

108.14 ppb

59.41 ppb

22.02 ppb

40.37 ppb

73.92 ppb

18.7 ppb

178.77 ppm

36.11 ppm

Results:

210Pb:

7Be:

54Mn:

228Ac:

(mBq/kg)

986.42

6241.00

<229.50

28.19

26.26

99.80

116.50

(ppb or ppm)

79.9 ppb

505.52 ppb

24.55 ppb

28.66 ppb

SNOLAB V04A

Sources prepared on Nov 21, 2019

4.4 g

12.638

191128

Nov 28, 2019

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Calibration Source Wipes

The Kimwipes are from sources SRS-19-004

Background Subtraction Using The Results from SNOLAB 05

Dec 11, 2019

(mBq/kg)

8.96

114.20

264.90

989.30

<23.57

18.40

111.70

0.00

1567.00

<137.40

0.02

38.30

(ppb or ppm)

0.73 ppb

9.25 ppb

21.46 ppb

80.13 ppb

<41.48 ppb

4.53 ppb

27.48 ppb

0 ppm

50.61 ppm

Results:

210Pb:

7Be:

54Mn:

228Ac:

(mBq/kg)

0.02

24810.00

<944.30

0.03

47.83

6.35

165.80

(ppb or ppm)

0 ppb

2009.61 ppb

1.56 ppb

40.79 ppb

SNOLAB V05

Sample prepared on Dec 05, 2019

4.4 g

7.882

191211

Dec 11, 2019

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Kimwipes Blank

These are clean Kimwipes

Standard Background Subtraction Using Combined Backgrounds

Dec 19, 2019

(mBq/kg)

40.49

84.56

801.40

823.40

<14.59

55.51

88.79

635.30

990.90

<83.35

<43.88

(ppb or ppm)

3.28 ppb

6.85 ppb

64.91 ppb

66.7 ppb

<25.68 ppb

13.66 ppb

21.84 ppb

20.52 ppm

32.01 ppm

Results:

210Pb:

7Be:

54Mn:

228Ac:

(mBq/kg)

20521.00

11650.00

212.32

352.60

17.38

29.66

115.10

142.60

(ppb or ppm)

1662.2 ppb

943.65 ppb

28.31 ppb

35.08 ppb

SNOLAB V06

Vial cap is downwards

0.832 g

17.701

191219
191220

Dec 19, 2019

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

19-004-K2 nEXO Calibration Sample

Specific Activity: 14.0 +- 0.09 Bq of 40K / [g RGK-1]

Jan 6, 2020

(mBq/kg)

4315.00

513.70

8816.00

15340.00

146.60

180.20

297.10

420.20

15233000.00

801100.00

615.97

484.90

<981.60

[11.57 – 11.72] Bq, 3-sigma range

(ppb or ppm)

349.52 ppb

41.61 ppb

714.1 ppb

1242.54 ppb

258.02 ppb

317.15 ppb

73.09 ppb

103.37 ppb

492025.9 ppm

25875.53 ppm

(Bq)

12.67

0.50

Results:

210Pb:

7Be:

54Mn:

228Ac:

(mBq/kg)

795110.00

2797000.00

1644.00

3001.00

594.49

511.20

<1864.00

(ppb or ppm)

64.4 ppm

226.56 ppm

<458.54 ppb

SNOLAB V07

Vial cap is upwards

2.046 g

1.937

200106

Jan 6, 2020

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

19-004-U1 nEXO Calibration Sample

Specific Activity: 4.94 +- 0.03 Bq of 238U / [g RGU-1]

Jan 8, 2020

(mBq/kg)

5114000.00

93980.00

6168000.00

377900.00

231300.00

5404.00

2079.00

1486.00

4783.50

28500.00

<637.00

<3318.00

[10.04 – 10.17] Bq, 3-sigma range

(ppb or ppm)

414.23 ppm

7.61 ppm

499.61 ppm

30.61 ppm

407.09 ppm

9.51 ppm

511.43 ppb

365.56 ppb

154.51 ppm

920.55 ppm

(Bq)

10.46

0.19

12.62

0.77

Average:

10.59

0.19

Results:

210Pb:

7Be:

54Mn:

228Ac:

(mBq/kg)

66658000.00

9102000.00

<10990.00

<960.20

<8204.00

(ppb or ppm)

5399.3 ppm

737.26 ppm

<2.02 ppm

(Bq)

136.38

18.62

SNOLAB V08

Vial cap is upwards

3.327 g

5.000

200108

Jan 8, 2020

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

19-004-T1 nEXO Calibration Sample

Specific Activity: 3.25 +- 0.07 Bq of 232Th / [g RGTh-1]

Jan 13, 2020

(mBq/kg)

50150.00

2512.00

511500.00

73360.00

3829.00

540.70

2961000.00

68880.00

233380.00

15970.00

<1441.00

<729.70

[10.58 – 11.05] Bq,
3-sigma range

(ppb or ppm)

4.06 ppm

0.2 ppm

41.43 ppm

5.94 ppm

6.74 ppm

0.95 ppm

728.41 ppm

16.94 ppm

7538.17 ppm

515.83 ppm

(Bq)

Sample Strength:

9.85

0.23

Results:

210Pb:

7Be:

54Mn:

228Ac:

(mBq/kg)

<1159000.00

23356.00

7448.00

26100.00

1789.00

2804000.00

64000.00

(ppb or ppm)

<93.88 ppm

689.78 ppm

15.74 ppm

(Bq)

Sample Strength:

9.33

0.21

Average:

9.57

0.16

SNOLAB V09

Vial cap is upwards

0.832 g

6.896

200113

Jan 13, 2020

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

19-004-K2 nEXO Calibration Sample

Specific Activity: 14.0 +- 0.09 Bq of 40K / [g RGK-1]

Jan 20, 2020

(mBq/kg)

494.30

686.50

1890.00

24090.00

<437.50

918.80

767.20

15495000.00

818300.00

763.17

785.30

<1728.00

[11.57 – 11.72 Bq,
3-sigma range

(ppb or ppm)

40.04 ppb

55.61 ppb

153.09 ppb

1951.29 ppb

<0.77 ppm

226.02 ppb

188.73 ppb

500488.5 ppm

26431.09 ppm

(Bq)

12.89

0.68

Results:

210Pb:

7Be:

54Mn:

228Ac:

(mBq/kg)

9895400.00

4772000.00

2661.30

4678.00

180.42

825.50

<1627.00

(ppb or ppm)

801.53 ppm

386.53 ppm

<400.24 ppb

SNOLAB V10

G.F. Thompson Co Ltd.

78.7 g

2.104

200120

Jan 20, 2020

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Masters Pro-Dope with Teflon

Newmarket ON

Jan 22, 2020

(mBq/kg)

10880.00

279.90

23870.00

2191.00

555.00

34.31

12220.00

361.10

53843.00

3100.00

<64.63

20.91

27.51

Pipe Sealant

(ppb or ppm)

881.28 ppb

22.67 ppb

1933.47 ppb

177.47 ppb

976.8 ppb

60.39 ppb

3006.12 ppb

88.83 ppb

1739.13 ppm

100.13 ppm

Results:

210Pb:

7Be:

54Mn:

228Ac:

(mBq/kg)

113630.00

135500.00

340.15

308.30

82.98

43.57

13140.00

422.80

(ppb or ppm)

9204.03 ppb

10975.5 ppb

3232.44 ppb

104.01 ppb

SNOLAB V11

Vial cap is upwards

2.102 g

4.791

200122

Jan 22, 2020

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

19-004-U2 nEXO Calibration Sample

Specific Activity: 4.94 +- 0.03 Bq of 238U / [g RGU-1]

Jan 27, 2020

(mBq/kg)

4911000.00

88240.00

5713000.00

311500.00

221400.00

4801.00

2384.00

993.70

<15330.00

<336.50

<1583.00

[10.32 – 10.45] Bq,
3-sigma range

(ppb or ppm)

397.79 ppm

7.15 ppm

462.75 ppm

25.23 ppm

389.66 ppm

8.45 ppm

586.46 ppb

244.45 ppb

<495.16 ppm

(Bq)

10.32

0.19

12.01

0.63

Average:

10.46

0.18

Results:

210Pb:

7Be:

54Mn:

228Ac:

(mBq/kg)

71438000.00

6386000.00

<472.00

<461.00

7337.00

4053.00

(ppb or ppm)

5786.48 ppm

517.27 ppm

1804.9 ppb

997.04 ppb

(Bq)

146.16

13.07

SNOLAB V12

Vial cap is upwards

3.180 g

2.958

200127

Jan 27, 2020

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

19-004-T2 nEXO Calibration Sample

Specific Activity: 3.25 +- 0.07 Bq of 232Th / [g RGTh-1]

Jan 30, 2020

(mBq/kg)

50670.00

2986.00

787600.00

99220.00

3309.00

723.50

3087000.00

72390.00

224340.00

18380.00

<1361.00

<610.70

[10.11 – 10.56] Bq,
3-sigma range

(ppb or ppm)

4.1 ppm

0.24 ppm

63.8 ppm

8.04 ppm

5.82 ppm

1.27 ppm

759.4 ppm

17.81 ppm

7246.18 ppm

593.67 ppm

(Bq)

Sample Strength:

10.27

0.24

Results:

210Pb:

7Be:

54Mn:

228Ac:

(mBq/kg)

<453000.00

52273.00

10520.00

27111.00

2143.00

2936000.00

67660.00

(ppb or ppm)

<36.69 ppm

722.26 ppm

16.64 ppm

(Bq)

Sample Strength:

9.77

0.23

Average:

10.00

0.16

SNOLAB V13

Vial cap is upwards

0.626 g

4.910

200130

Jan 30, 2020

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

19-004-K1 nEXO Calibration Sample

Specific Activity: 14.0 +- 0.09 Bq of 40K / [g RGK-1]

Feb 4, 2020

(mBq/kg)

2371.00

1068.00

68810.00

33160.00

<311.40

<1200.00

15444000.00

836630.00

<1641.00

104.30

1429.00

[ 8.70 – 8.82] Bq,
3-sigma range

(ppb or ppm)

192.05 ppb

86.51 ppb

5.57 ppm

2.69 ppm

<0.55 ppm

<295.2 ppb

498841.2 ppm

27023.15 ppm

(Bq)

9.67

0.52

Results:

210Pb:

7Be:

54Mn:

228Ac:

(mBq/kg)

<562400.00

<928.20

<933.30

<4932.00

(ppb or ppm)

<45.55 ppm

<1213.27 ppb

SNOLAB V14

Part No: FG-p

63.9 g

6.021

200204

Feb 4, 2020

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Plastic Process Equipment Inc.
Food Grade Anti-Seize Thread Compound

Macedonia, OH, 44056

Feb 10, 2020

(mBq/kg)

1519.00

48.29

1630.00

268.80

75.37

7.18

601.70

30.42

189.63

118.30

7.47

8.36

<4.27

Pipe Sealant
Fortified with PTFE

(ppb or ppm)

123.04 ppb

3.91 ppb

132.03 ppb

21.77 ppb

132.65 ppb

12.64 ppb

148.02 ppb

7.48 ppb

6.13 ppm

3.82 ppm

Results:

210Pb:

7Be:

54Mn:

228Ac:

(mBq/kg)

46194.00

25930.00

<70.64

<9.71

430.30

38.22

(ppb or ppm)

3741.71 ppb

2100.33 ppb

105.85 ppb

9.4 ppb

SNOLAB V15

Type: 801-16-BLU

357.4 g

2.819

200210

Feb 10, 2020

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Push Lok Plus Muli-Purpose Hose

Parker Hannifin Corp

Feb 13, 2020

(mBq/kg)

1803.00

51.43

5141.00

534.40

106.00

8.73

3102.00

91.69

9333.10

568.80

5.01

9.99

<5.85

(ppb or ppm)

146.04 ppb

4.17 ppb

416.42 ppb

43.29 ppb

186.56 ppb

15.36 ppb

763.09 ppb

22.56 ppb

301.46 ppm

18.37 ppm

Results:

210Pb:

7Be:

54Mn:

228Ac:

(mBq/kg)

5826.00

7988.00

<124.20

22.17

10.20

3004.00

101.90

(ppb or ppm)

471.91 ppb

647.03 ppb

738.98 ppb

25.07 ppb

SNOLAB V16

¾” Natural polypropylene

623.5 g

7.646

200213
200214

Feb 13, 2020

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

ENPURE Polypropylene Tubing

Type: SCH-80 Natural

Feb 21, 2020

(mBq/kg)

6.11

1.71

17.12

23.48

<1.34

12.55

1.97

4.02

15.06

<1.20

1.02

0.51

Lot: JJ05-B-12021321352

(ppb or ppm)

0.49 ppb

0.14 ppb

1.39 ppb

1.9 ppb

<2.36 ppb

3.09 ppb

0.48 ppb

129.85 ppb

486.44 ppb

Results:

210Pb:

7Be:

54Mn:

228Ac:

(mBq/kg)

1062.50

569.20

<6.47

0.88

0.64

<3.34

(ppb or ppm)

86.06 ppb

46.11 ppb

<0.82 ppb

SNOLAB V17

Clear Non-Toxic PVC with Polyester Braid and Rigid PVC Helix

240.5 g

3.847

200221

Feb 21, 2020

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Reinforced FDA PVC Suction Hose

Feb 25, 2020

(mBq/kg)

494.30

19.11

739.30

127.20

26.56

3.28

60.84

8.14

678.07

100.80

<3.93

<3.08

(ppb or ppm)

40.04 ppb

1.55 ppb

59.88 ppb

10.3 ppb

46.75 ppb

5.78 ppb

14.97 ppb

2 ppb

21.9 ppm

3.26 ppm

Results:

210Pb:

7Be:

54Mn:

228Ac:

(mBq/kg)

2178.20

1735.00

60.51

28.93

<2.38

48.45

12.81

(ppb or ppm)

176.43 ppb

140.54 ppb

11.92 ppb

3.15 ppb

SNOLAB V18

NIST Sample

28.825 g

12.736

200225
200302

Feb 25, 2020

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Powdered Ocean Sediment Calibration Sample

Cross Comparison Sample A

Mar 9, 2020

(mBq/kg)

11640.00

255.70

21440.00

2071.00

588.40

23.00

12650.00

331.70

255240.00

13160.00

7109.00

366.40

<29.11

Sample placed directly on top of the detector

(ppb or ppm)

942.84 ppb

20.71 ppb

1736.64 ppb

167.75 ppb

1035.58 ppb

40.48 ppb

3.11 ppm

0.08 ppm

8244.25 ppm

425.07 ppm

Results:

210Pb:

7Be:

54Mn:

228Ac:

241Am

(mBq/kg)

<15060.00

<452.60

91.50

29.67

12730.00

352.00

20580.00

1569.00

(ppb or ppm)

<1219.86 ppb

3.13 ppm

0.09 ppm

SNOLAB V19

NIST Sample

33.454 g

21.617

200519

May 19, 2020

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Powdered Ocean Sediment Calibration Sample

Cross Comparison Sample B

Jun 10, 2020

(mBq/kg)

10980.00

223.00

17630.00

1702.00

571.60

18.50

12060.00

299.10

247900.00

12720.00

6397.80

352.70

<25.82

Sample placed directly on top of the detector

(ppb or ppm)

889.38 ppb

18.06 ppb

1428.03 ppb

137.86 ppb

1006.02 ppb

32.56 ppb

2.97 ppm

0.07 ppm

8007.17 ppm

410.86 ppm

Results:

210Pb:

7Be:

54Mn:

228Ac:

241Am

(mBq/kg)

<8362.00

<272.30

74.54

20.54

12000.00

307.10

28410.00

1509.00

(ppb or ppm)

<677.32 ppb

2.95 ppm

0.08 ppm

SNOLAB V20

Lake in City of Greater Sudbury, Ontario

993.9 g

14.666

200309

Mar 9, 2020

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Long Lake Water

Sample collected on 2019-10-14 at 16:54

Mar 24, 2020

(mBq/kg)

2.15

0.56

<12.40

<0.27

<0.61

52.14

8.26

1.00

0.38

<0.15

Sample placed in beaker “∆”

(ppb or ppm)

174.23 ppt

45.23 ppt

<1 ppb

<0.48 ppb

<0.15 ppb

1684.19 ppb

266.89 ppb

Results:

210Pb:

7Be:

54Mn:

228Ac:

(mBq/kg)

1151.50

456.70

6.81

2.47

<0.38

1.24

0.81

(ppb or ppm)

93.27 ppb

36.99 ppb

0.31 ppb

0.2 ppb

SNOLAB V21

Lake in City of Greater Sudbury, Ontario

981.4 g

17.117

200610
200624

Jun 10, 2020

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Simon Lake Water

Sample collected on 2019-11-01 at 18:15

Jun 30, 2020

(mBq/kg)

1.60

0.51

12.40

13.22

<0.44

<0.82

402.00

25.30

<0.46

0.11

0.23

Sample placed in beaker “H”

(ppb or ppm)

129.52 ppt

40.99 ppt

1004.4 ppt

1070.82 ppt

<0.77 ppb

<0.2 ppb

12984.6 ppb

817.19 ppb

Results:

210Pb:

7Be:

54Mn:

228Ac:

(mBq/kg)

1144.60

434.20

<2.80

<0.27

4.99

1.07

(ppb or ppm)

92.71 ppb

35.17 ppb

1.23 ppb

0.26 ppb

SNOLAB V22

Lake in City of Greater Sudbury, Ontario

935.2 g

21.708

200630

Jun 30, 2020

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Robinson Lake Water

Sample collected on 2019-10-22 at 12:43

Jul 22, 2020

(mBq/kg)

5.12

0.58

21.36

12.70

<0.33

0.32

0.49

95.61

9.55

0.23

0.30

<0.14

Sample placed in beaker “□”

(ppb or ppm)

414.48 ppt

46.96 ppt

1.73 ppb

1.03 ppb

<0.58 ppb

0.08 ppb

0.12 ppb

3088.33 ppb

308.47 ppb

Results:

210Pb:

7Be:

54Mn:

228Ac:

(mBq/kg)

536.35

394.10

0.50

2.04

0.23

0.30

1.94

0.79

(ppb or ppm)

43.44 ppb

31.92 ppb

0.48 ppb

0.19 ppb

SNOLAB V23

Lake in City of Greater Sudbury, Ontario

986.0 g

16.659

200722

Jul 22, 2020

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Meatbird Lake Water

Sample collected on 2019-10-08 at 10:50

Aug 11, 2020

(mBq/kg)

0.19

0.45

<13.83

0.37

0.22

<0.32

124.59

11.09

<0.39

<0.21

Sample placed in beaker “∆”

(ppb or ppm)

15.39 ppt

36.17 ppt

<1.12 ppb

0.65 ppb

0.38 ppb

<0.08 ppb

4024.26 ppb

358.21 ppb

Results:

210Pb:

7Be:

54Mn:

228Ac:

(mBq/kg)

<567.10

0.98

1.91

0.03

0.19

0.79

(ppb or ppm)

<45.94 ppb

0.19 ppb

SNOLAB V24

Lake in City of Greater Sudbury, Ontario

842.7 g

13.500

200811
20081101

Aug 11, 2020

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Kelly Lake Water

Sample collected on 2019-10-7 at 10:30

Aug 25, 2020

(mBq/kg)

3.31

0.78

11.09

30.51

<0.60

0.36

0.77

501.76

33.74

0.60

0.49

<0.24

(ppb or ppm)

267.95 ppt

63.22 ppt

898.29 ppt

2471.31 ppt

<1.06 ppb

0.09 ppb

0.19 ppb

16.21 ppm

1.09 ppm

Results:

210Pb:

7Be:

54Mn:

228Ac:

(mBq/kg)

2300.50

1355.00

2.43

3.23

<0.43

6.61

1.40

(ppb or ppm)

186.34 ppb

109.76 ppb

1.62 ppb

0.34 ppb

SNOLAB V25

Lake in City of Greater Sudbury, Ontario

1032.2 g

13.395

201006

Oct 6, 2020

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Robinson Lake Water

Sample collected on 2020-09-19 at 14:30

Oct 20, 2020

(mBq/kg)

1.35

0.56

<29.58

0.42

0.24

<1.04

100.12

11.32

0.50

0.39

<0.16

(ppb or ppm)

109.59 ppt

45.27 ppt

<2.4 ppb

0.73 ppb

0.42 ppb

<0.26 ppb

3233.88 ppb

365.64 ppb

Results:

210Pb:

7Be:

54Mn:

228Ac:

(mBq/kg)

881.22

989.90

10.41

3.23

0.34

0.23

1.88

0.99

(ppb or ppm)

71.38 ppb

80.18 ppb

0.46 ppb

0.24 ppb

SNOLAB V26

Lake in City of Greater Sudbury, Ontario

985.3 g

10.743

201023

Oct 23, 2020

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

St. Charles Lake Water

Sample collected on 2020-09-19 at 14:53

Nov 3, 2020

(mBq/kg)

1.50

0.62

27.39

23.77

0.28

0.32

0.66

56.58

9.84

1.25

0.47

0.17

0.24

(ppb or ppm)

0.12 ppb

0.05 ppb

2.22 ppb

1.93 ppb

0.49 ppb

0.5 ppb

0.08 ppb

0.16 ppb

1.83 ppm

0.32 ppm

Results:

210Pb:

7Be:

54Mn:

228Ac:

(mBq/kg)

23258.00

29210.00

13.73

3.76

<0.24

0.16

0.93

(ppb or ppm)

1883.9 ppb

2366.01 ppb

0.04 ppb

0.23 ppb

SNOLAB V27

Lake in City of Greater Sudbury, Ontario

956.4 g

11.146

201106

Nov 6, 2020

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Long Lake Water

Sample collected on 2020-09-27 at 15:00

Nov 17, 2020

(mBq/kg)

<0.98

<16.85

0.40

0.26

<0.63

35.53

8.90

0.61

0.44

<0.31

(ppb or ppm)

<79.38 ppt

<1.36 ppb

0.71 ppb

0.46 ppb

<0.15 ppb

1147.59 ppb

287.53 ppb

Results:

210Pb:

7Be:

54Mn:

228Ac:

(mBq/kg)

1542.40

1182.00

14.09

3.54

<0.39

<0.84

(ppb or ppm)

124.93 ppb

95.74 ppb

<0.21 ppb

SNOLAB V28

Lake Bed Sand from Lohi Lake in City of Greater Sudbury, Ontario

600.4 g

2.930

201020

Oct 20, 2020

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Lohi Lake Sand

Sample collected on 2020-09-19 at 17:10

Oct 23, 2020

(mBq/kg)

7917.00

172.90

17980.00

1656.00

422.10

18.84

6592.00

179.80

381970.00

19550.00

N/D – No observable signal due to U & Th Interference

<27.73

(ppb or ppm)

641.28 ppb

14 ppb

1456.38 ppb

134.14 ppb

742.9 ppb

33.16 ppb

1621.63 ppb

44.23 ppb

12337.63 ppm

631.47 ppm

Results:

210Pb:

7Be:

54Mn:

228Ac:

(mBq/kg)

455740.00

198800.00

N/D – No observable signal due to U & Th Interference

6194.00

190.90

(ppb or ppm)

36914.94 ppb

16102.8 ppb

1523.72 ppb

46.96 ppb

SNOLAB V29

Lake Bed Sand from Ramsey Lake in City of Greater Sudbury, Ontario

605.1 g

2.930

201103

Nov 3, 2020

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Ramsey Lake Sand

Sample collected on 2020-09-15 at 18:50

Nov 6, 2020

(mBq/kg)

14950.00

305.70

28000.00

2515.00

765.40

27.20

16230.00

407.20

513760.00

26280.00

N/D – No observable signal due to U & Th Interference

<34.32

(ppb or ppm)

1210.95 ppb

24.76 ppb

2268 ppb

203.72 ppb

1347.1 ppb

47.87 ppb

3992.58 ppb

100.17 ppb

16594.45 ppm

848.84 ppm

Results:

210Pb:

7Be:

54Mn:

228Ac:

(mBq/kg)

156490.00

184600.00

N/D – No observable signal due to U & Th Interference

14800.00

392.30

(ppb or ppm)

12675.69 ppb

14952.6 ppb

3640.8 ppb

96.51 ppb

SNOLAB V30

Lake Bed Sand from St Charles Lake in City of Greater Sudbury, Ontario

591.6 g

2.534

201117

Nov 17, 2020

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

St Charles Lake Sand

Sample collected on 2020-09-19 at 14:55

Nov 20, 2020

(mBq/kg)

12370.00

263.60

29950.00

2642.00

606.50

25.82

16700.00

422.70

572120.00

29270.00

N/D – No observable signal due to U & Th Interference

17.15

25.66

(ppb or ppm)

1001.97 ppb

21.35 ppb

2425.95 ppb

214 ppb

1067.44 ppb

45.44 ppb

4108.2 ppb

103.98 ppb

18479.48 ppm

945.42 ppm

Results:

210Pb:

7Be:

54Mn:

228Ac:

(mBq/kg)

<266100.00

N/D – No observable signal due to U & Th Interference

16120.00

429.60

(ppb or ppm)

<21.55 ppm

3965.52 ppb

105.68 ppb

SNOLAB V31

Lake in City of Greater Sudbury, Ontario

1023.10 g

13.687

201120

Nov 20, 2020

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Vermillion Lake Water

Sample collected on 2020-10-23 at 13:00

Dec 4, 2020

(mBq/kg)

2.20

0.58

15.37

20.24

<0.42

0.97

0.60

63.51

9.21

<0.38

<0.22

(ppb or ppm)

178.44 ppt

46.95 ppt

1.24 ppb

1.64 ppb

<0.74 ppb

0.24 ppb

0.15 ppb

2051.44 ppb

297.32 ppb

Results:

210Pb:

7Be:

54Mn:

228Ac:

(mBq/kg)

<1381.00

57.03

5.72

<0.24

3.17

0.95

(ppb or ppm)

<111.86 ppb

0.78 ppb

0.23 ppb

SNOLAB V32

Lake in City of Greater Sudbury, Ontario

961.0 g

13.777

201204

Dec 4, 2020

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Meatbird Lake Water

Sample collected on October 05, 2020 @ 14:00

Dec 18, 2020

(mBq/kg)

0.83

0.58

<24.71

<0.30

0.06

0.60

167.44

15.20

0.18

0.35

0.27

0.25

(ppb or ppm)

67.28 ppt

47.34 ppt

<2 ppb

<0.53 ppb

0.02 ppb

0.15 ppb

5.41 ppm

0.49 ppm

Results:

210Pb:

7Be:

54Mn:

228Ac:

(mBq/kg)

977.51

1067.00

5.13

2.80

0.30

0.27

4.56

1.18

(ppb or ppm)

79.18 ppb

86.43 ppb

1.12 ppb

0.29 ppb

SNOLAB V33

Lucas Cell Coating

68.3 g

23.652

201218

Dec 18, 2020

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

ZnS(Ag) Powder

Saint-Gobain

The sample is also counted in the Well detector as SNOLAB CW10

Jan 11, 2021

(mBq/kg)

<3.30

<98.38

0.86

0.90

<4.37

21.74

34.92

<3.09

<0.89

(ppb or ppm)

<0.27 ppb

<7.97 ppb

1.52 ppb

1.59 ppb

<1.08 ppb

702.33 ppb

1127.92 ppb

Results:

210Pb:

7Be:

54Mn:

228Ac:

(mBq/kg)

53891.00

34430.00

5.06

11.94

<1.33

<5.33

(ppb or ppm)

4.37 ppm

2.79 ppm

<1.31 ppb

SNOLAB V34

72% Cocoa

202.9 g

4.980

240425

Apr 25, 2024

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Merci (Stork) Dark Chocolate

Made in Germany

Apr 30, 2024

(mBq/kg)

453.30

23.50

952.50

379.50

5.61

6.60

285.70

21.85

20507.00

10540.00

62.39

14.87

<19.40

(ppb or ppm)

36.72 ppb

1.9 ppb

77.15 ppb

30.74 ppb

9.88 ppb

11.62 ppb

70.28 ppb

5.38 ppb

662.38 ppm

340.44 ppm

Results:

210Pb:

7Be:

54Mn:

228Ac:

(mBq/kg)

<29620.00

227.13

95.34

22.85

14.15

630.10

51.65

(ppb or ppm)

<2.4 ppm

155 ppb

12.71 ppb

SNOLAB V35

Medium Grey

107.4 g

6.894

240430

Apr 30, 2024

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Sikafloor 22NA PurCem

Type: SS-0721

May 7, 2024

(mBq/kg)

5466.00

126.70

15130.00

1128.00

251.30

12.68

6028.00

165.60

347280.00

17800.00

101.34

22.99

<29.50

(ppb or ppm)

442.75 ppb

10.26 ppb

1225.53 ppb

91.37 ppb

442.29 ppb

22.32 ppb

1.48 ppm

0.04 ppm

11217.14 ppm

574.94 ppm

Results:

210Pb:

7Be:

54Mn:

228Ac:

(mBq/kg)

43451.00

41950.00

<207.70

52.07

22.07

5739.00

173.90

(ppb or ppm)

3519.53 ppb

3397.95 ppb

1.41 ppm

0.04 ppm

SNOLAB V36

200.5 g

2.934

240507

May 7, 2024

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Cadbury Dark Chocolate

Made in Canada

May 10, 2024

(mBq/kg)

373.70

23.06

809.90

372.50

14.04

6.64

194.70

20.70

105060.00

5483.00

39.01

14.36

7.81

15.99

(ppb or ppm)

30.27 ppb

1.87 ppb

65.6 ppb

30.17 ppb

24.71 ppb

11.68 ppb

47.9 ppb

5.09 ppb

3393.44 ppm

177.1 ppm

Results:

210Pb:

7Be:

54Mn:

228Ac:

(mBq/kg)

<33080.00

<157.70

<27.03

370.40

47.45

(ppb or ppm)

<2.68 ppm

91.12 ppb

11.67 ppb

In Progress Sample Measurements Counted on the Vue des Alpes Detector

In Progress and To Be Measured:

Sample Description

Manufacturer

Mass (g)

Live Time (days)

Run Numbers

Counting Dates
(if applicable)

Next Sample

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

(mBq/kg)

(ppb or ppm)

Results:

210Pb:

7Be:

54Mn:

228Ac:

(mBq/kg)

(ppb or ppm)