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:

234Th: 63.29 and 92.59 keV
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: 277.371, 583.19, 860.557 and 2614.53 keV,

228Ac: 209.253, 338.320, 463,004, 911.21, 964.766 and 968.971 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 runs for the Lively Detector

If a measurement in the signal region is below the sideband regions then the 90% confidence limit is calculated.

Sample Description

Manufacturer

Mass (g)

Live Time (days)

Run Numbers

Counting Dates
(if applicable)

Background 1

171.327

Mar 29, 2019

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Completely Empty Detector

Jan 20, 2020

(mBq)

1.201

0.053

2.58

0.40

0.110

0.015

1.074

0.058

4.97

0.45

0.024

0.021

0.118

0.018

Results:

210Pb:

7Be:

54Mn

228Ac:

210Po:

(mBq)

289.25

31.53

<0.26

0.024

0.021

1.305

0.099

<2629.00

Background 2

55.461

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)

1.243

0.083

3.02

0.86

0.161

0.029

1.38

0.10

8.35

0.94

<0.043

0.111

0.031

Results:

210Pb:

7Be:

54Mn

228Ac:

210Po:

(mBq)

554.52

80.36

0.74

0.30

0.020

0.035

2.22

0.18

<4463.00

Combined Background

Combined Backgrounds of runs CW1

171.327

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

(mBq)

1.201

0.053

2.58

0.40

0.110

0.015

1.074

0.058

4.97

0.45

0.024

0.021

0.118

0.018

Completely Empty Detector

Results:

210Pb:

7Be:

54Mn

228Ac:

210Po:

(mBq)

289.25

31.53

<0.26

0.024

0.021

1.305

0.099

<2629.00

Completed Sample Measurements for the Lively Detector

PICO Measurements:

Sample Description

Mass (g)

Live Time (days)

Run Numbers

Counting Dates
(if applicable)

PICO L01

Crystal Plus CP70FG
Batch: 12453

1308.1 g

21.721

200630

Jun 30, 2020

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Mineral Oil

STE Oil Company Inc

Jul 22, 2020

(mBq/kg)

<0.17

<3.92

0.117

0.080

<0.31

<2.06

0.086

0.087

0.103

0.070

Another sample counted from same batch as PGT PICO 74

(ppm / ppb / ppt)

<13.77 ppt

<317.52 ppt

205.04 ppt

141.13 ppt

<76.26 ppt

<66.54 ppb

Results:

210Pb:

7Be:

54Mn

228Ac:

(mBq/kg)

<1438.00

0.26

0.82

0.077

0.073

0.76

0.36

(ppm / ppb / ppt)

<116.48 ppb

187.5 ppt

88.73 ppt

PICO L02

Functional Products Inc.
Macedonia, OH, 44056, USA

982.9 g

13.513

200811
20081101

Aug 11, 2020

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Functional PD-610

Lot Number: 200722-L

Aug 25, 2020

(mBq/kg)

1.04

0.30

20.47

6.92

0.30

0.13

<0.33

3.03

2.27

<0.16

<0.095

Solution of alkyl methacrylate polymer in mineral oil

(ppm / ppb / ppt)

83.84 ppt

24.33 ppt

1658.07 ppt

560.44 ppt

520.43 ppt

223.52 ppt

<81.18 ppt

97.74 ppb

73.16 ppb

Results:

210Pb:

7Be:

54Mn

228Ac:

(mBq/kg)

<899.30

3.91

1.33

0.08

0.11

0.50

0.51

(ppm / ppb / ppt)

<72.84 ppb

122.7 ppt

126.12 ppt

PICO L03

Red Piezo Cables

173.3 g

15.658

200825

Aug 25, 2020

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

PICO-40L Piezo Cables

Twisted Triple Shielded Red Beldon Cable

Sep 10, 2010

(mBq/kg)

0.97

1.07

343.00

48.15

5.38

0.63

9.99

1.53

149.00

17.32

0.11

0.43

<0.54

Beldon ID: 88503 E108898 3PR24

(ppm / ppb / ppt)

78.88 ppt

86.27 ppt

27.78 ppb

3.9 ppb

9.46 ppb

1.12 ppb

2.46 ppb

0.38 ppb

4.81 ppm

0.06 ppm

Results:

210Pb:

7Be:

54Mn

228Ac:

(mBq/kg)

95161.00

32760.00

<4.78

0.08

0.40

6.99

2.07

(ppm / ppb / ppt)

7.71 ppm

2.65 ppm

1.72 ppb

0.51 ppb

PICO L04

Polymide and thermoplastic resin

57.2 g

10.867

201023

Oct 23, 2020

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Circuit Board Laminate

ISOLA P95/P25

Nov 3, 2020

(mBq/kg)

15970.00

321.70

27040.00

1853.00

805.50

25.87

25480.00

615.50

21209.00

1170.00

<10.66

15.44

16.07

Sheet Dimensions:
14.5 cm x 14.7 cm x 2 mm (thick)

(ppm / ppb / ppt)

1293.57 ppb

26.06 ppb

2190.24 ppb

150.09 ppb

1417.68 ppb

45.53 ppb

6268.08 ppb

151.41 ppb

685.05 ppm

37.79 ppm

Results:

210Pb:

7Be:

54Mn

228Ac:

(mBq/kg)

29981.00

9840.00

91.20

179.80

169.69

25.76

24070.00

588.70

(ppm / ppb / ppt)

2428.46 ppb

797.04 ppb

5921.22 ppb

144.82 ppb

PICO L05

Halogen free flame retardant double sided flexible copper clad plate

10.3 g

13.749

201120

Nov 20, 2020

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Copper Clad Plate for Circuit Boards

Guangdong Shengyi Technology Co.,LTD.

Dec 4, 2020

(mBq/kg)

<2.67

121.80

194.70

<6.81

10.56

14.23

21.79

106.30

<7.04

0.23

5.28

Product No: SF305 101820DRN250A LKN

(ppm / ppb / ppt)

<0.22 ppb

9.87 ppb

15.77 ppb

<11.99 ppb

2.6 ppb

3.5 ppb

703.91 ppb

3433.49 ppb

Results:

210Pb:

7Be:

54Mn

228Ac:

Co57:

Co58:

(mBq/kg)

1222.60

9333.00

<72.48

<9.88

40.48

25.53

<10.36

<4.32

(ppm / ppb / ppt)

99.03 ppb

755.97 ppb

9.96 ppb

6.28 ppb

PICO L06

Halogen free flame resistant type coverlay

3.4 g

13.797

201204

Dec 4, 2020

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Coverlay Polyimide for Circuit Boards

Guangdong Shengyi Technology Co.,LTD.

Dec 18, 2020

(mBq/kg)

<13.72

773.20

618.70

22.98

12.59

19.05

45.79

237.01

370.30

6.92

16.83

<19.86

Product No: SF305C 1025NT250A H

(ppm / ppb / ppt)

<1.11 ppb

62.63 ppb

50.11 ppb

40.44 ppb

22.16 ppb

<2.23 ppb

7.66 ppm

11.96 ppm

Results:

210Pb:

7Be:

54Mn

228Ac:

(mBq/kg)

<34570.00

<204.10

<16.60

239.90

79.86

(ppm / ppb / ppt)

<2.8 ppm

59.02 ppb

19.65 ppb

PICO L07

500 Series Copper Clad Board
Laminate composed of woven glass with epoxy resin

166.4 g

23.814

201218

Dec 18, 2020

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

MG Chemicals copper clad Board

MG Chemicals, Burlington, ON, Canada

Jan 11, 2021

(mBq/kg)

30850.00

551.50

41760.00

2114.00

1489.00

33.62

38530.00

890.10

47640.00

2443.00

<2.70

<5.81

Product No:
FR4 515

(ppm / ppb / ppt)

2.5 ppm

0.04 ppm

3.38 ppm

0.17 ppm

2.62 ppm

0.06 ppm

9.48 ppm

0.22 ppm

1538.77 ppm

78.91 ppm

Results:

210Pb:

7Be:

54Mn

228Ac:

(mBq/kg)

20572.00

4904.00

198.30

88.45

253.89

17.32

35810.00

815.70

(ppm / ppb / ppt)

1.67 ppm

0.4 ppm

8.81 ppm

0.2 ppm

PICO L08

Cloth Base Epoxy Substrate with Copper Foil Bonded on Both Sides

179.9 g

8.840

210111
210119

Jan 11, 2021

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Nan-Ya Circuit Board FR4-86UV

Nan Ya Plastics Corporation, Taiwan

Jan 20, 2021

(mBq/kg)

<0.50

<20.59

0.93

0.43

<2.07

<9.11

0.41

0.51

<0.67

Product ID:
FR4-86UV

(ppm / ppb / ppt)

<0.04 ppb

<1.67 ppb

1.63 ppb

0.75 ppb

<0.51 ppb

<294.25 ppb

Results:

210Pb:

7Be:

54Mn

228Ac:

58Co

57Co

Lot No:
7706-24-2C

(mBq/kg)

<1393.00

<3.24

0.68

0.61

2.59

2.05

1.38

0.59

1.45

0.78

(ppm / ppb / ppt)

<112.83 ppb

0.64 ppb

0.5 ppb

PICO L09

LTD Materials LLC

32.1 g

18.374

210205
210207
210216

Feb 5, 2021

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

HSQ-900 Synthetic Quartz (Polished)

Polished HSQ 900 Sample disks

6 disks

Feb 24, 2021

(mBq/kg)

<0.45

58.72

31.83

0.17

0.75

<3.33

<50.95

<1.75

1.31

1.17

(ppm / ppb / ppt)

<36.45 ppt

4.76 ppb

2.58 ppb

0.29 ppb

1.31 ppb

<0.82 ppb

<1.65 ppm

Results:

210Pb:

7Be:

54Mn

228Ac:

(mBq/kg)

<1175.00

<18.22

<1.96

13.90

5.16

(ppm / ppb / ppt)

<95.18 ppb

3.42 ppb

1.27 ppb

PICO L10

LTD Materials LLC

17.9 g

23.554

210224
210301

Feb 24, 2021

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

HSQ-900 Synthetic Quartz (Non-Polished)

Non-polished HSQ 900 Sample disks

3 disks

Mar 22, 2021

(mBq/kg)

<1.96

61.58

54.36

1.75

1.29

<4.86

<46.98

<1.22

<2.21

(ppm / ppb / ppt)

<0.16 ppb

4.99 ppb

4.4 ppb

3.07 ppb

2.27 ppb

<1.2 ppb

<1.52 ppm

Results:

210Pb:

7Be:

54Mn

228Ac:

(mBq/kg)

<2961.00

<23.62

<3.89

16.72

8.16

(ppm / ppb / ppt)

<239.84 ppb

4.11 ppb

2.01 ppb

In Progress Sample Measurements for the Lively Detector

Runs in Progress:

Sample Description

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)

(ppm / ppb / ppt)

Results:

210Pb:

7Be:

54Mn

228Ac:

210Po:

(mBq/kg)

(ppm / ppb / ppt)