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.
PICO Measurements:



























Sample Description Manufacturer Mass (g) Live Time (days) Counting Dates
(if applicable)

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co
Comments
PICO 1 Sonneborn Refined Products. 789.3 g 6.691 Nov 12, 2013 (mBq/kg) 1.08 +- 0.92 <31.23

<1.68

2.34 +- 0.90 10.39 +- 9.50 <0.21

<0.11


PAROL White Mineral Oil


Nov 19, 2013 (ppb or ppm) 0.088 ppb +- 0.075 ppb <2.53 ppb

<2.96 ppb

0.58 ppb +- 0.22 ppb 335.56 ppb +- 306.92 ppb








PICO 2 Small Diameter Piezos and Piezo Fragments from August Production 11.9 g 4.451 Oct 15, 2013 (mBq/kg) <22.85

1844.04 +- 1688.97 <14.32

37.48 +- 30.90 394.96 +- 302.52 <32.32

<15.24


Piezo Acoustic Sensors


Oct 23, 2013 (ppb or ppm) <1.85 ppb

149.37 ppb +- 136.81 ppb <25.20 ppb

9.22 ppb +- 7.60 ppb 12.76 ppm +- 9.77 ppm








PICO 3 Small Diameter Piezos from December Production 10.6 g 3.290 Feb 18, 2014 (mBq/kg) 1719.51 +- 107.74 <3180.36

172.28 +- 71.82 470.53 +- 69.59 547.17 +- 443.40 <10.64

18.87 +- 26.68
Piezo Acoustic Sensors
Also PICO CW01
Feb 21, 2014 (ppb or ppm) 139.28 ppb +- 8.73 ppb <257.61 ppb

303.22 ppb +- 126.40 ppb 115.75 ppb +- 17.12 ppb 17.67 ppm +- 14.32 ppm








PICO 4 Type: M.CN/03-90.90-10
Serial 001 03-13
90 mm x 90 mm x 10 mm thick		 366.0 g 6.536 Apr 9, 2014 (mBq/kg) 2.38 +- 2.17 156.76 +- 72.46 1.24 +- 3.51 <0.53

16.67 +- 15.85 27.87 +- 3.28 <0.61


CsI Crystal (Amcrys) Amcrys, located in Kharkov, Ukraine

Apr 16, 2014 (ppb or ppm) 0.19 ppb +- 0.18 ppb 12.70 ppb +- 5.87 ppb 2.18 ppb +- 6.17 ppb <0.13 ppb

538.33 ppb +- 511.86 ppb









Additional Activities:
(mBq/kg)

7Be: <10.31



134Cs: 25.87 +- 1.96

126I: 6.59 +- 3.47






(ppb or ppm)




















PICO 05 16 small piezeos 20.8 g 4.746 Apr 23, 2014 (mBq/kg) 1143.26 +- 54.49 722.31 +- 1235.53 116.78 +- 52.00 272.06 +- 30.99 91.35 +- 197.12 <8.88

<3.85


Piezo Acoustic Sensors Small Diameter Piezos from December Production

Apr 28, 2014 (ppb or ppm) 92.60 ppb +- 4.41 ppb 58.51 ppb +- 100.08 ppb 205.53 ppb +- 91.53 ppb 66.93 ppb +- 7.62 ppb 2.95 ppm +- 6.37 ppm








PICO 06
20.5 g 3.920 May 6, 2014 (mBq/kg) <18.65

<975.97

7.09 +- 33.47 20.93 +- 20.93 292.68 +- 224.39 4.88 +- 14.63 <5.90


Calcined Nb doped PZT


May 10, 2014 (ppb or ppm) <1.51 ppb

<79.05 ppb

12.49 ppb +- 58.91 ppb 5.15 ppb +- 5.15 ppb 9.45 ppm +- 7.25 ppm








PICO 07
18.6 g 6.050 May 10, 2014 (mBq/kg) 29.29 +- 21.51 1178.53 +- 1004.95 59.95 ppb +- 58.41 26.74 +- 18.35 <180.58

<6.07

<7.09


Piezos “O”, sintered in old furnace “Sentro”


May 16, 2014 (ppb or ppm) 2.37 ppb +- 1.74 ppb 95.46 ppb +- 81.40 ppb 105.51 ppb +- 102.80 ppb 6.58 ppb +- 4.51 ppb <5.83 ppm










PICO 08
18.6 g 6.373 May 16, 2014 (mBq/kg) 46.25 +- 19.61 623.34 +- 998.52 <72.6

8.77 +- 15.99 865.59 +- 252.69 5.48 +- 16.13 <7.09


Piezos “N”, sintered in new furnace


May 23, 2014 (ppb or ppm) 3.75 ppb +- 1.59 ppb 50.49 ppb +- 80.88 ppb <127.88 ppb

2.16 ppb +- 3.93 ppb 27.96 ppm +- 8.16 ppm








PICO 09
8.9 g 5.858 Jul 17, 2014 (mBq/kg) 30.43 +- 27.32 6.12 +- 985.35 21.64 +- 66.42 1.11 +- 25.74 56.18 +- 303.37 <6.34

<10.19


Large Diameter Piezo Acoustic Sensors (1) May/June 2014 Production (6/2/2014)

Jul 23, 2014 (ppb or ppm) 2.47 ppb +- 2.21 ppb 0.50 ppb +- 79.81 ppb 38.08 ppb +- 116.90 ppb 0.27 ppb +- 6.33 ppb 1.81 ppm +- 9.80 ppm








PICO 10
14.8 g 4.825 Jun 27, 2014 (mBq/kg) 16.09 +- 21.42 565.98 +- 881.64 <37.39

25.13 +- 24.89 <193.34

<25.99

<4.46


Small Diameter Piezo Acoustic Sensors (11) May/June 2014 Production (6/2/2014) Also PICO CW02
Jul 2, 2014 (ppb or ppm) 1.30 ppb +- 1.74 ppb 45.84 ppb +- 71.41 ppb <65.81 ppb

6.18 ppb +- 6.12 ppb <6.24 ppm











Sample Description Manufacturer Mass (g) Live Time (days) Counting Dates
(if applicable)

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co
Comments
PICO 11 Distillation completed July 4, 2014 869.3 g 5.253 Jul 11, 2014 (mBq/kg) 4.77 +- 0.86 18.31 +- 25.81 0.37 +- 0.80 <0.53

<1.75

<0.23

<0.30


Distilled LAB


Jul 17, 2014 (ppb or ppm) 0.386 ppb +- 0.070 ppb 1.48 ppb +- 2.09 ppb 0.66 ppb +- 1.40 ppb <0.13 ppb

<56.58 ppb










PICO 12 Lab stored in SS cylinder, testing to determine if LAB leaches impurities from the cylinder 194.6 g 15.907 Sep 29, 2014 (mBq/kg) 10.62 +- 0.54 <88.17

2.95 +- 2.51 2.12 +- 1.90 541.11 +- 43.68 <0.95

<0.23


Distilled LAB


Oct 15, 2014 (ppb or ppm) 0.86 ppb +- 0.04 ppb <7.14 ppb

5.19 ppb +- 4.42 ppb 0.52 ppb +- 0.47 ppb 17.48 ppm +- 1.41 ppm








PICO 13 Loctite E-30CL Epoxy 48.0 g 6.900 Aug 11, 2014 (mBq/kg) 2.21 +- 5.37 393.58 +- 246.17 2.65 +- 4.12 <0.42

12.50 +- 137.50 <2.94

<1.20


Epoxy


Aug 18, 2014 (ppb or ppm) 0.18 ppb +- 0.44 ppb 31.88 ppb +- 19.94 ppb 4.66 ppb +- 7.25 ppb <0.10 ppb

0.40 ppm +- 4.44 ppm








PICO 14 LAB is distilled using SNOLAB distillation system. 1550.3 g 2.732 Oct 28, 2014 (mBq/kg) 25.17 +- 2.30 21.54 +- 41.02 <0.15

1.09 +- 1.08 <3.74

<1.18

0.31 +- 0.46
Distilled LAB Distillation completed Oct 24, 2014

Oct 31, 2014 (ppb or ppm) 2.04 ppb +- 0.19 ppb 1.74 ppb +- 3.32 ppb <0.27 ppb

0.27 ppb +- 0.27 ppb <121.03 ppb










PICO 15
664.3 g 3.187 for U and Th Nov 8, 2014 (mBq/kg) 4.14 +- 1.35 10.25 +- 42.34 <0.53

0.66 +- 1.05 <5.35

<0.30

0.27 +- 0.36
Double distilled LAB

3.936 for other isotopes Nov 12, 2014 (ppb or ppm) 0.34 ppb +- 0.11 ppb 0.83 ppb +- 3.43 ppb <0.93 ppb

0.16 ppb +- 0.26 ppb <172.66 ppb










PICO 16
22.6 g 5.057 May 17, 2015 (mBq/kg) <25.71

169.27 +- 333.47 <21.06

0.73 +- 13.32 190.66 +- 204.16 <17.79

<3.23


JB Weld Clear Weld Epoxy J.B. Weld Company

May 22, 2015 (ppb or ppm) <2.08 ppb

13.71 ppb +- 27.01 ppb <37.07 ppb

0.18 ppb +- 3.28 ppb 6.16 ppm +- 6.59 ppm








PICO 17
3.5 g dry 6.964 May 25, 2015 (mBq/kg) <80.86

15.79 +- 1895.24 <45.14

<69.42

50.57 +- 683.43 <50.86

<36.29


Pilot Gold Marker Ink Pilot Corporation of America 4.5 g wet
Jun 1, 2015 (ppb or ppm) <6.55 ppb

1.28 ppb +- 153.51 ppb <79.45 ppb

<17.08 ppb

1.63 ppm +- 22.07 ppm








PICO 18 May 8, 2015 Batch 27.5 g 2.915 May 22, 2015 (mBq/kg) 2062.50 +- 95.32 1978.55 +- 1824.77 189.66 +- 66.91 464.45 +- 46.08 310.66 +- 251.38 <24.07

<9.38


Piezo Acoustic Sensors 21 sensors

May 25, 2015 (ppb or ppm) 167.06 ppb +- 7.72 ppb 160.26 ppb +- 147.81 ppb 333.804 ppb +- 117.76 ppb 114.25 ppb +- 11.33 ppb 10.03 ppm +- 8.12 ppm








PICO 19 Large Diameter Batch
June 15th, 2015
Nb Doped		 59.2 g 3.928 Jun 28, 2015 (mBq/kg) 747.45 +- 39.84 1688.00 +- 999.66 39.31 +- 20.89 145.09 +- 20.36 6885.52 +- 546.86 <17.15

10.28 +- 7.79
Piezo Ceramic Sample contains 3 piezos

Jul 2, 2015 (ppb or ppm) 60.54 ppb +- 3.23 ppb 136.73 ppb +- 80.65 ppb 69.18 ppb +- 36.77 ppb 35.69 ppb +- 5.01 ppb 222.40 ppm +- 17.66 ppm








PICO 20
58.2 g 3.944 Jun 4, 2015 (mBq/kg) <7.58

38.13 +- 378.18 35.71 +- 28.05 <7.07

93.23 +- 82.95 7.17 +- 7.56 <1.91


Large Diameter Piezo Acoustic Sensors (3)


Jun 8, 2015 (ppb or ppm) <0.61 ppb

3.10 ppb +- 30.63 ppb 62.86 ppb +- 49.37 ppb <1.74 ppb

3.01 ppm +- 2.68 ppm









Sample Description Manufacturer Mass (g) Live Time (days) Counting Dates
(if applicable)

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co
Comments
PICO 21 Alpha-Wire DB P/N 78304 ECOCable Mini 53.8 g 4.032 Jun 8, 2015 (mBq/kg) 359.74 +- 26.89 263.32 +- 387.22 26.62 +- 11.88 722.04 +- 35.88 51.99 +- 113.89 <8.22

<5.41


Small Diameter Cable ECOGen Cables by Alpha Wire

Jun 12, 2015 (ppb or ppm) 29.14 ppb +- 2.18 ppb 21.33 ppb +- 31.37 ppb 46.85 ppb +- 20.90 ppb 177.62 ppb +- 8.83 ppb 1.68 ppm +- 3.77 ppm








PICO 22 Alpha Wire H1, P/N: 36004CY,
Lot #: 423417-061314-0023		 74.6 g 5.843 Jun 17, 2015 (mBq/kg) 136.00 +- 11.43 117.10 +- 160.20 15.80 +- 7.47 62.99 +- 8.57 555.56 +- 110.05 <2.88

<3.51


Thick Diameter Cable ECOGen Cables by Alpha Wire

Jun 23, 2015 (ppb or ppm) 11.02 ppb +- 0.93 ppb 9.49 ppb +- 12.98 ppb 27.81 ppb +- 13.15 ppb 15.47 ppb +- 2.11 ppb 17.94 ppm +- 3.55 ppm








PICO 23 Raw LAB Sample taken from barrel as received 857.9 g 7.753 Jul 15, 2015 (mBq/kg) <0.42

<67.43

0.13 +- 0.60 0.12 +- 0.44 4.98 +- 5.57 <0.60

<0.29


LAB


Jul 23, 2015 (ppb or ppm) <34.25 ppt

<5.46 ppb

0.22 ppb +- 1.06 ppb 0.03 ppb +- 0.11 ppb 160.99 ppb +- 179.97 ppb








PICO 24 Filtered LAB, LAB filtered as it is removed from barrel 844.7 g 7.961 Aug 24, 2015 (mBq/kg) <0.0414

0.03 +- 12.63 0.12 +- 0.60 <0.63

<3.74

<0.64

<0.15


LAB


Sep 1, 2015 (ppb or ppm) <3.39 ppt

0.002 ppb +- 1.023 ppb 0.22 ppb +- 1.06 ppb <0.16 ppb

< 120.72 ppb










PICO 25 Loctite's 1C Hysol 48.9 g 3.968 Jul 2, 2015 (mBq/kg) 804.04 +- 40.44 835.55 +- 993.30 47.27 +- 8.49 120.65 +- 17.65 522.86 +- 300.55 <18.51

<10.86


Epoxy Henkel Corp

Jul 6, 2015 (ppb or ppm) 65.13 ppb +- 3.27 ppb 67.68 ppb +- 80.46 ppb 83.19 ppb +- 14.95 ppb 29.68 ppb +- 4.34 ppb 16.89 ppm +- 9.71 ppm








PICO 26 June 10, 2015 shipment 32.7 g 4.869 Jun 23, 2015 (mBq/kg) 10.56 +- 9.64 <566.39

28.71 +- 23.69 15.31 +- 9.60 646.42 +- 170.55 <6.91

<3.00


Small Diameter Piezo Acoustic Sensors (24)


Jun 28, 2015 (ppb or ppm) 0.86 ppb +- 0.78 ppb <45.88 ppb

50.53 ppb +- 41.69 ppb 3.77 ppb +- 2.36 ppb 20.88 ppm +- 5.51 ppm








PICO 27 Graphite With SS Foil Insert 1/16” thick 252.4 g 2.928 Oct 16, 2015 (mBq/kg) 1987.60 +- 60.33 811.32 +- 323.65 49.11 +- 5.40 598.12 +- 24.45 2920.99 +- 254.93 <9.84

6.74 +- 6.55
Graphite Gasket Hennig Gasket & Seals

Oct 19, 2015 (ppb or ppm) 161.00 ppb +- 4.89 ppb 65.72 ppb +- 26.22 ppb 86.43 ppb +- 9.51 ppb 147.14 ppb +- 6.01 ppb 94.34 ppm +- 6.23 ppm








PICO 28 Two part silver solder mask material 14.1 g 7.842 Sep 17, 2015 (mBq/kg) <23.83

565.94 +- 487.69 <28.72

<22.33

<285.89

<20.43

<6.31




Silver Epoxy MG Chemicals
Silver Conductive Epoxy
Cat No.: 8331S-15G

Sep 25, 2015 (ppb or ppm) <1.93 ppb

45.84 ppb +- 39.50 ppb <50.55

<5.49 ppb

<9.23 ppm










PICO 29
59.3 g 5.779 Sep 25, 2015 (mBq/kg) 26.57 +- 10.91 <259.10

<14.44

1.65 +- 9.07 <184.22

<14.12

1.03 +- 4.10


Polyimide Substrate Material Tech-Etch
Plymouth, MA

Oct 1, 2015 (ppb or ppm) 2.15 ppb +- 0.88 ppb <21.25 ppb

<25.41 ppb

0.40 ppb +- 2.23 ppb <5.95 ppm










PICO 30 Part 1:
Product Code: CA-40
Lot: 5082437
1.974 Oct 13, 2015 (mBq/kg) 5542.74 +- 194.09 471.218 +- 827.862 123.45 +- 17.10 710.33 +- 58.78 2511.745 +- 502.27 <27.73

<29.38




Taiyo Solder Mask
Grade BN		 Part 2:
Product Code: PSR-4000
Lot: 5082427

Oct 15, 2015 (ppb or ppm) 448.96 ppb +- 15.72 ppb 38.17 ppb +- 67.06 ppb 217.28 ppb +- 30.10 ppb 174.74 ppb +- 14.46 ppb 81.13 ppm +- 16.22 ppm









Sample Description Manufacturer Mass (g) Live Time (days) Counting Dates
(if applicable)

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co
Comments
PICO 31 PVC Semi-circle of pipe 61.5 g 3.829 Dec 14, 2015 (mBq/kg) 96.21 +- 12.41 7.05 +- 289.83 <9.71

12.85 +- 7.72 1786.41 +- 335.74 <9.82

<3.61


PVC Sample 1


Dec 18, 2015 (ppb or ppm) 7.79 ppb +- 1.01 ppb 0.57 ppb +- 23.48 ppb <17.09 ppb

3.16 ppb +- 1.90 ppb 57.70 ppm +- 10.84 ppm








PICO 32 PVC Plug 22.9 g 2.193 Jan 19, 2016 (mBq/kg) 1128.24 +- 89.03 <2237.21

120.70 +- 35.65 12.56 +- 35.55 <362.40

<52.66

<28.60


PVC Sample 2


Jan 21, 2016 (ppb or ppm) 91.39 ppb +- 7.21 ppb <181.21 ppb

212.44 ppb +- 62.75 ppb 3.09 ppb +- 8.74 ppb <11.71 ppm










PICO 33
108.2 g 5.770 Mar 11, 2016 (mBq/kg) <3.73

<171.62

2.15 +- 5.40 <4.32

<47.40

<7.09

<1.23


HDPE Rod Stock Material


Mar 17, 2016 (ppb or ppm) <0.30 ppb

<13.90 ppb

3.79 ppb +- 9.50 ppb <1.06 ppb

<1.53 ppm










PICO 34
260.9 g 6.861 Mar 17, 2016 (mBq/kg) <2.88

<35.15

1.67 +- 3.03 <3.14

<23.68

<3.10

<0.58

7Be Signal:
HDPE Wedge


Mar 24, 2016 (ppb or ppm) <0.23 ppb

<2.85 ppb

2.94 ppb +- 5.34 ppb <0.77 ppb

<764.73 ppb







12.40 mBq/kg +- 10.50 mBq/kg
PICO 35 Each board is 1.7 mm thick and 23.7 mm in diameter 7.9 g 7.012 Mar 24, 2016 (mBq/kg) 215.77 +- 37.95 27.80 +- 600.75 16.45 +- 27.34 20.06 +- 34.15 668.10 +- 410.89 31.772 +- 28.481 <8.10

54Mn Signal:
6 Nearly Round Circuit Boards


Mar 31, 2016 (ppb or ppm) 17.48 ppb +- 3.07 ppb 2.25 ppb +- 48.66 ppb 28.95 ppb +- 48.12 ppb 4.94 ppb +- 7.01 ppb 21.60 ppm +- 13.27 ppm





16.20 mBq/kg +- 13.67 mBq/kg
PICO 36
24.2 g 7.741 Mar 31, 2016 (mBq/kg) <14.22

<344.89

9.81 +- 12.00 <16.21

<188.02

<9.05

377.67 +- 27.16 54Mn Signal:
Stainless Steel Strips


Apr 8, 2016 (ppb or ppm) <1.15 ppb

<27.13 ppb

17.26 ppb +- 21.13 ppb <3.99 ppb

<6.07 ppm







10.50 mBq/kg +- 9.13 mBq/kg
PICO 37
45.0 g 6.828 Apr 28, 2016 (mBq/kg) <8.49

<190.41

2.90 +- 6.96 <9.41

106.80 +- 91.22 0.96 +- 6.87 <2.51


HDPE Epoxy


May 5, 2016 (ppb or ppm) <0.69 ppb

<15.42 ppb

5.11 ppb +- 12.24 ppb <2.31 ppb

3.45 ppm +- 2.95 ppm








PICO 38
13.7 g 6.876 Jun 16, 2016 (mBq/kg) <15.26

112.03 +- 282.55 <24.96

<20.64

<323.94

<18.10

<4.16


UV-cured Epoxy Loctite 366


Jun 23, 2016 (ppb or ppm) <1.24 ppb

9.07 ppb +- 22.89 ppb <43.94 ppb

<5.08 ppb

<10.46 ppm










PICO 39 Polyolefin 12.7 g 6.935 May 5, 2016 (mBq/kg) 13.42 +- 27.78 122.87 +- 620.76 12.55 +- 37.53 <42.71

206.06 +- 357.87 <25.75

<13.47


Adhesive-Lined Shrink Tubing HTAT-4/1-0-SP-SI-ND

May 12, 2016 (ppb or ppm) 1.09 ppb +- 2.25 ppb 9.95 ppb +- 50.28 ppb 22.08 ppb +- 66.05 ppb <10.51 ppb

6.66 ppb +- 11.56 ppb








PICO 40 SI 5015 53.6 g 6.952 Jun 23, 2016 (mBq/kg) <6.81

73.02 +- 183.26 14.16 +- 9.46 14.75 +- 9.55 205.62 +- 114.65 12.13 +- 9.22 <1.81


Loctite Superflex Blue RTV Silicon Part No. 30560
Batch No: LB6AAD2150

Jun 30, 2016 (ppb or ppm) <0.55 ppb

5.92 ppb +- 14.84 ppb 24.93 ppb +- 16.65 ppb 3.63 ppb +- 2.35 ppb 6.64 ppm +- 3.70 ppm









Additional Activities:
(mBq/kg)





228Ac: <9.83













(ppb or ppm)




(Not in Equilibrium with other Th daughters) <2.42 ppb












Sample Description Manufacturer Mass (g) Live Time (days) Counting Dates
(if applicable)

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co
Comments
PICO 41 SI 595 CL 58.2 g 6.620 May 12, 2016 (mBq/kg) 2.31 +- 7.43 61.39 +- 155.23 <7.80

<9.78

44.35 +- 93.30 <6.63

<1.43


Loctite Clear RTV Adhesive Sealant Part No. 59530

May 19, 2016 (ppb or ppm) 0.19 ppb +- 0.60 ppb 4.97 ppb +- 12.57 ppb <3.73 ppb

<2.41 ppb

1.43 ppm +- 3.01 ppm








PICO 42 3M Reflective Sheeting 178.1 g 4.153 Jul 21, 2016 (mBq/kg) 2073.24 +- 63.78 365.21 +- 460.95 116.51 +- 22.47 2695.46 +- 70.01 5282.33 +- 390.20 11.80 +- 11.83 2.00 +- 7.50
Retro-reflector


Jul 26, 2016 (ppb or ppm) 167.93 ppb +- 5.17 ppb 29.58 ppb +- 37.34 ppb 205.06 ppb +- 39.54 ppb 663.08 ppb +- 17.22 ppb 170.62 ppm +- 12.60 ppm








PICO 43 Heraeus 89.6 g 6.992 Jun 30, 2016 (mBq/kg) <4.72

<77.75

<4.97

4.01 +- 3.71 <31.12

<1.52

<2.07


Bubble Chamber Synthetic Quartz HT-12115262-1
Part no: 90173660

Jul 7, 2016 (ppb or ppm) <0.38 ppb

<6.30 ppb

<8.74 ppb

0.99 ppb +- 0.91 ppb <1.01 ppm










PICO 44 Heraeus 39.4 g 6.876 Jul 7, 2016 (mBq/kg) <5.56

65.58 +- 136.25 5.92 +- 6.82 <6.22

<82.16

<6.17

<2.92


Bubble Chamber Synthetic Quartz HT-12115263-1
Part No. 90173662

Jul 14, 2016 (ppb or ppm) <0.45 ppb

5.31 ppb +- 11.04 ppb 10.42 ppb +- 11.99 ppb <1.53 ppb

<2.65 ppm










PICO 45 Heraeus 41.4 g 15.882 Jul 26, 2016 (mBq/kg) <3.91

56.48 +- 113.70 19.99 +- 4.23 7.25 +- 4.84 46.84 +- 51.47 <6.26

<1.14


Bubble Chamber Synthetic Quartz HT-12115436-1 Part No. 90173662

Aug 11, 2016 (ppb or ppm) <0.32 ppb

4.57 ppb +- 9.20 ppb 19.35 ppb +- 7.45 ppb 1.78 ppb +- 1.19 ppb 1.51 ppm +- 1.66 ppm








PICO 46 Heraeus 39.0 g 5.883 Aug 25, 2016 (mBq/kg) 2.25 +- 6.40 <138.62

3.52 +- 7.32 <6.59

<121.64

5.44 +- 7.69 <2.87


Bubble Chamber Synthetic Quartz HT-12115437-1 Part No. 90173662

Aug 31, 2016 (ppb or ppm) 0.18 ppb +- 0.52 ppb <11.23 ppb

6.19 ppb +- 12.88 ppb <1.62 ppb

<3.93 ppm










PICO 47
23.5 g 6.458 Jun 9, 2016 (mBq/kg) <9.70

55.24 +- 203.82 <5.66

<14.47

92.65 +- 137.36 <10.04

<1.87

7Be Signal:
MAS Epoxy


Jun 16, 2016 (ppb or ppm) <0.79 ppb

4.48 ppb +- 16.51 ppb <9.96 ppb

<3.56 ppb

2.99 ppm +- 4.44 ppm





117.96 mBq/kg +- 59.66 mBq/kg
PICO 48 Includes strain relief stub soldered to main enclosure 49.6 g 4.076 Jun 5, 2016 (mBq/kg) 4.19 +- 7.61 317.48 +- 305.90 3.68 +- 9.73 <10.39

98.39 +- 92.90 8.19 +- 8.17 <1.96


PICO-60 Transducer Enclosure


Jun 9, 2016 (ppb or ppm) 0.34 ppb +- 0.62 ppb 25.72 ppb +- 24.78 ppb 6.49 ppb +- 17.13 ppb <2.56 ppb

3.18 ppm +- 3.00 ppm








PICO 49
12.1 g 6.948 Aug 18, 2016 (mBq/kg) 3.45 +- 18.68 413.09 +- 482.29 35.77 +- 23.74 28.60 +- 22.22 189.84 +- 273.31 <20.91

<6.36


Manganese (IV) Oxide


Aug 25, 2016 (ppb or ppm) 0.28 ppb +- 1.51 ppb 33.46 ppb +- 39.07 ppb 62.95 ppb +- 41.79 ppb 7.03 ppb +- 5.47 ppb 6.13 ppb +- 8.83 ppb








PICO 50 Small heat exchanger, duplicate of PICO 60 installation 145.7 g 5.013 Feb 17, 2017 (mBq/kg) <3.76

42.37 +- 97.53 1.04 +- 3.83 <2.70

<36.93

1.00 +- 3.12 <1.20


Copper Camera Heat Exchanger


Feb 22, 2017 (ppb or ppm) <0.31 ppb

3.43 ppb +- 7.90 ppb 1.84 ppb +- 6.74 ppb <0.67 ppb

<1.19 ppm











Sample Description Manufacturer Mass (g) Live Time (days) Counting Dates
(if applicable)

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co
Comments
PICO 51
61.7 g 6.987 Aug 11, 2016 (mBq/kg) <2.16

<148.88

0.23 +- 5.49 <2.66

<67.16

<5.74

<1.51


PICO-60 Transducer Enclosure – Nickel and Gold Plated


Aug 18, 2016 (ppb or ppm) <0.18 ppb

<12.06 ppb

0.41 ppb +- 9.67 ppb <0.66 ppb

<2.17 ppm










PICO 52 Large heat exchanger 628.6 g 5.559 Mar 4, 2017 (mBq/kg) <0.90

<43.72

<1.77

2.65 +- 1.50 3.55 +- 10.80 <1.09

<0.25


Copper Camera Heat Exchanger


Mar 10, 2017 (ppb or ppm) <72.93 ppt

<3.54 ppb

<3.11 ppb

0.65 ppb +- 0.37 ppb 114.54 ppb +- 348.80 ppb








PICO 53 Assorted Brass Compression Fittings 762.5 g 4.822 Feb 22, 2017 (mBq/kg) 0.54 +- 0.81 <58.67

<2.47

4.31 +- 1.16 <4.66

<0.73

3.63 +- 0.71
Camera System Brass Fittings Swagelok

Feb 27, 2017 (ppb or ppm) 42.38 ppt +- 65.85 ppt <4.75 ppb

<4.35 ppb

1.06 ppb +- 0.29 ppb <150.59 ppb










PICO 54 Includes circuit board, LED’s and cabling 44.3 g 1.990 Feb 27, 2017 (mBq/kg) 1661.42 +- 121.56 388.96 +- 1429.07 139.84 +- 50.30 2334.73 +- 134.00 960.66 +- 521.11 116.77 +- 53.77 27.81 +- 20.98
Camera LED Circuit Board Ring


Mar 1, 2017 (ppb or ppm) 134.58 ppb +- 9.85 ppb 31.51 ppb +- 115.76 ppb 246.11 ppb +- 88.53 ppb 574.34 ppb +- 32.96 ppb 31.03 ppm +- 16.83 ppm








PICO 55 Gasket is Aramid Fiber bonded with nitrile rubber 191.4 g 1.000 Mar 3, 2017 (mBq/kg) 59022.60 +- 1449.37 48730.37 +- 7107.69 4136.98 +- 271.69 36039.42 +- 851.20 474115.98 +- 25021.22 48.352 +- 156.492 <112.45


Palmetto SuperSheat II, Gasket Style 2970 A Greene, Tweed Company, Denton, MD, USA

Mar 4, 2017 (ppb or ppm) 4.78 ppm +- 0.12 ppm 3.95 ppm +- 0.58 ppm 7.29 ppm +- 0.48 ppm 8.87 ppm +- 0.21 ppm 1.53% +- 0.08%








PICO 56 WO#: 16389 (6) ER316L-0.093” 1225.5 g 2.907 Jan 31, 2017 (mBq/kg) 0.58 +- 1.24 46.00 +- 69.24 <7.53

0.86 +- 1.38 <12.10

0.55 +- 1.05 12.35 +- 1.65 54Mn Signal:
Welded Steel Plate with 3/32” Electrodes ML#: 35
HT: 178336

Feb 3, 2017 (ppb or ppm) 0.05 ppb +- 0.10 ppb 3.73 ppb +- 5.61 ppb <13.25 ppb

0.21 ppb +- 0.34 ppb <390.97 ppb







2.79 mBq/kg +- 1.11 mBq/kg

Additional Activities:
(mBq/kg)

226Ra: 141.32 +- 38.66















(ppb or ppm)
(Not in Equilibrium with other U238 progeny) 11.45 ppb +- 3.13 ppb













PICO 57 WO#: 16389 (6) ER316L-0.125” 1228.9 g 3.879 Feb 3, 2017 (mBq/kg) <1.41

<55.73

<5.78

<1.22

<8.11

<0.75

8.55 +- 1.21 54Mn Signal:
Welded Steel Plate with 1/8” Electrodes ML#: 36
HT: 178336

Feb 7, 2017 (ppb or ppm) < 0.11 ppb

<4.51 ppb

<10.17 ppb

<0.30 ppb

<261.79 ppb







2.17 mBq/kg +- 0.87 mBq/kg

Additional Activities:
(mBq/kg)

226Ra: 40.96 +- 28.43















(ppb or ppm)
(Not in Equilibrium with other U238 progeny) 3.32 ppb +- 2.30 ppb













PICO 58 WO#: 16389 (6) SA240-316/316L 1223.7 g 4.024 Feb 7, 2017 (mBq/kg) <1.27

83.22 +- 46.88 1.56 +- 1.67 3.61 +- 1.25 <7.59

<0.57

10.45 +- 1.29 54Mn Signal:
Plate from Shell (Outokumpu) ML#: N/A
HT: H7P9

Feb 11, 2017 (ppb or ppm) <0.10 ppb

6.74 ppb +- 3.80 ppb 2.74 ppb +- 2.93 ppb 0.87 ppb +- 0.31 ppb <245.21 ppb







2.87 mBq/kg +- 1.03 mBq/kg
PICO 59 WO#: 16389 (6) SA240-316/316L 785.5 g 3.896 Feb 13, 2017 (mBq/kg) 2.17 +- 1.53 117.73 +- 74.72 1.98 +- 1.92 <1.61

<13.22

<1.87

20.36 +- 2.13 54Mn Signal:
Plate Used for Weld Samples (No Welds) ML#: 1
HT: 506414

Feb 17, 2017 (ppb or ppm) 0.18 ppb +- 0.12 ppb 9.54 ppb +- 6.05 ppb 3.48 ppb +- 3.38 ppb <0.40 ppb

<426.87 ppb







2.54 mBq/kg +- 1.36 mBq/kg
PICO 60 WO#: 16389 (6)
SA240-316/316L		 282.3 g 6.891 Mar 17, 2017 (mBq/kg) 15.85 +- 2.90 <76.84

0.26 +- 2.50 1.52 +- 2.20 91.16 +- 34.81 <3.24

1.91 +- 1.28
Metal Shavings from Nozzles ML#: 14
HT: 83241

Mar 24, 2017 (ppb or ppm) 1.04 ppb +- 0.24 ppb <6.22 ppb

0.46 ppb +- 4.41 ppb 0.37 ppb +- 0.54 ppb 2.94 ppm +- 1.12 ppm









Sample Description Manufacturer Mass (g) Live Time (days) Counting Dates
(if applicable)

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co
Comments
PICO 61 WO#: 16389 (6) A479-316/316L 656.1 g 6.891 Mar 10, 2017 (mBq/kg) 2.47 +- 1.13 <50.87

<1.85

10.05 +- 1.52 <9.09

<0.96

14.52 +- 1.51 54Mn Signal:
Metal Shavings from Shell Flange ML#: 6
HT: E141903

Mar 17, 2017 (ppb or ppm) 0.20 ppb +- 0.09 ppb <4.12 ppb

<3.28 ppb

2.47 ppb +- 0.37 ppb <293.45 ppb







2.60 mBq/kg +- 0.88 mBq/kg
PICO 62 This is used as part of the stinger system for PICO-60 14.0 g 2.010 Feb 11, 2017 (mBq/kg) 1708.11 +- 149.67 4024.26 +- 1686.91 90.81 +- 38.82 568.42 +- 97.60 48365.71 +- 4167.36 <70.86

<71.36


Quartz to Metal Tube Transition Sections Length: 14.4 cm 2 pieces
Feb 13, 2017 (ppb or ppm) 138.36 ppb +- 12.12 ppb 325.97 ppb +- 136.64 ppb 159.82 ppb +- 68.33 ppb 139.83 ppb +- 24.01 ppb 1562.21 ppm +- 134.61 ppm








PICO 63 Basler ACA-2000-340km
ID: 105702-25		 98.6 g 2.369 Mar 1, 2017 (mBq/kg) 1870.32 +- 75.85 <754.64

17.46 +- 3.83 1509.35 +- 60.87 6560.93 +- 601.37 <25.29

17.87 +- 12.31
PICO60 Camera Made in Germany

Mar 3, 2017 (ppb or ppm) 151.46 ppb +- 6.14 ppb <61.13 ppb

30.734 ppb +- 6.74 ppb 371.30 ppb +- 14.97 ppb 211.92 ppm +- 19.42 ppm








PICO 64 Part No: 59915K481 153.5 g 8.817 Apr 4, 2017 (mBq/kg) <2.59

<82.76

<2.00

0.46 +- 2.07 10.80 +- 22.29 0.19 +- 2.12 11.19 +- 1.98
PTFE-Lined Stainless Steel Ball Joint Rod End McMaster Carr

Apr 13, 2017 (ppb or ppm) <0.21 ppb

<6.70 ppb

<3.52 ppb

0.11 ppb +- 0.51 ppb 348.88 ppb +- 719.86 ppb








PICO 65 Part NO: 1548N14 McMaster Carr
 1332.6 g 0.977 Apr 3, 2017 (mBq/kg) 6711.63 +- 177.23 6876.68 +- 1135.80 411.00 +- 34.55 10114.48 +- 218.62 9972.99 +- 673.95 <26.81

<19.65


Weather-Resistant Suction Water Hose Goodyear Versiflo 150 water S&D, 39022,
Made in Canada

Apr 4, 2017 (ppb or ppm) 543.64 ppb +- 14.36 ppb 557.01 ppb +- 92.00 ppb 723.36 ppb +- 60.81 ppb 2488.16 ppb +- 53.78 ppb 322.13 ppm +- 21.77 ppm








PICO 66 P/N 12990702X2#7980 2788.1 g 9.926 Mar 24, 2017 (mBq/kg) <0.44

<15.95

0.37 +- 0.59 <0.53

<5.11

<0.39

<0.081


Fused Silica (Camera Windows) 7.028” x 2” thick

Apr 3, 2017 (ppb or ppm) <35.33 ppt

<1.29 ppb

0.65 ppb +- 1.04 ppb <0.13 ppb

<164.89 ppb










PICO 67 Lot No. 6H21PU 400.1 g 0.790 Jul 28, 2017 (mBq/kg) 134.17 +- 14.30 140.05 +- 654.47 53.52 +- 25.01 1931.44 +- 73.16 367.51 +- 187.19 14.92 +- 18.14 <11.82


Tinactin Foot Powder


Jul 29, 2017 (ppb or ppm) 27.16 ppb +- 2.90 ppb 11.34 ppb +- 53.01 ppb 94.20 ppb +- 44.02 ppb 475.13 ppb +- 18.00 ppb 11.87 ppm +- 6.05 ppm








PICO 68 Piezos Used for PICO-60 Runs 2 and 3 924.9 g 3.393 Sep 1, 2017 (mBq/kg) 3.16 +- 1.74 <8.00

2.68 +- 1.94 0.54 +- 1.49 2244.08 +- 142.48 0.02 +- 1.49 1.57 +- 1.60
PICO-60 Complete Piezos


Sep 5, 2017 (ppb or ppm) 0.26 ppb +- 0.14 ppb <0.65 ppb

4.71 ppb +- 3.41 ppb 0.13 ppb +- 0.37 ppb 72.48 ppm +- 4.60 ppm








PICO 69 3M Scotchlite 3290 148.2 g 3.518 Aug 24, 2017 (mBq/kg) 708.91 +- 38.09 <568.79

28.52 +- 30.43 213.47 +- 27.95 3008.97 +- 329.14 <13.58

5.50 +- 8.50
Reflector Material


Aug 28, 2017 (ppb or ppm) 57.42 ppb +- 3.08 ppb <46.07 ppb

50.20 ppb +- 53.56 ppb 52.51 ppb +- 6.87 ppb 97.19 ppm +- 10.63 ppm









Additional Activities:
(mBq/kg)





228Ac: 503.713 +- 57.12











(ppb or ppm)




(Not in Equilibrium with other Th daughters) 123.91 ppb +- 14.05 ppb









PICO 70 3M Scotchlite 8830 45.1 g 3.728 Aug 28, 2017 (mBq/kg) 437.49 +- 51.57 <108.58

<41.34

143.33 +- 42.32 38419.92 +- 2571.35 <23.34

<21.85


Reflector Material 2” wide

Sep 1, 2017 (ppb or ppm) 35.44 ppb +- 4.18 ppb <8.80 ppb

<72.76 ppb

35.26 ppb +- 10.41 ppb 1240.96 ppm +- 83.05 ppm









Additional Activities:
(mBq/kg)





228Ac: 430.758 +- 100.928











(ppb or ppm)




(Not in Equilibrium with other Th daughters) 105.97 ppb +- 24.83 ppb










Sample Description Manufacturer Mass (g) Live Time (days) Counting Dates
(if applicable)

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co
Comments
PICO 71
133.4 g 4.989 Aug 10, 2017 (mBq/kg) <2.74

<122.32

11.41 +- 6.37 <3.45

<20.23

<2.65

<0.95


533-N Marinelli Beaker Ga-Ma and Associates Inc

Aug 15, 2017 (ppb or ppm) <0.22 ppb

<9.91 ppb

20.08 ppb +- 11.21 ppb <0.85 ppb

<653.51 ppb










PICO 72 Insulation for PICO-40L 1924.7 g 11.950 Oct 5, 2017 (mBq/kg) <0.28

<11.63

<0.72

<0.50

<1.95

<0.086

<0.20


Polyethylene Insulation


Oct 17, 2017 (ppb or ppm) <22.56 ppt

<0.94 ppb

<1.27 ppb

<0.12 ppb

<63.05 ppb










PICO 73 Multitherm PG-1 470.2 g 6.214 Nov 10, 2017 (mBq/kg) <0.67

29.67 +- 28.67 0.74 +- 1.18 <0.41

<8.45

<0.66

<0.36


Mineral Oil


Nov 17, 2017 (ppb or ppm) <54.41 ppt

2.40 ppb +- 2.32 ppb 1.31 ppb +- 2.08 ppb <0.10 ppb

<272.99 ppb










PICO 74 Crystal Plus CP70FG 450.2 g 7.689 Sep 27, 2017 (mBq/kg) <0.40

8.89 +- 24.42 1.82 +- 1.27 <0.85

<7.52

<0.69

<0.23


Mineral Oil STE Oil Company Inc

Oct 5, 2017 (ppb or ppm) <32.57 ppt

0.72 ppb +- 1.98 ppb 3.20 ppb +- 2.23 ppb <0.21 ppb

<242.86 ppb










PICO 75 Samples:
L04011-A (Steel)
L-0400937-A (Steel)
L-04-035A (Steel)
L-04-036A (Steel)
 1234.6 g 5.759 Sep 21, 2017 (mBq/kg) <0.33

<46.43

1.52 +- 0.86 <0.44

<2.82

<0.48

2.87 +- 0.73 54Mn Signal:
PICO-40L Camera Mount Parts L-04-022-C (Steel)
L-0802-001-A, 003-A, 004-A (Copper)
L-0801-001-A, 004-A, 006-A, 007-A, 008-A, 009-A, L-0802-008-B (Steel)

Sep 27, 2017 (ppb or ppm) <26.97 ppt

<3.76 ppb

2.68 ppb +- 1.51 ppb <0.11 ppb

<90.94 ppb







<0.43 mBq/kg

PICO 76 Spotcheck SKD-S2 Aerosol Developer
Part No: 01-5352-77		 142.8 g 2.993 Sep 18, 2017 (mBq/kg) 7751.85 +- 240.91 16152.81 +- 2789.60 359.74 +- 53.07 7175.80 +- 235.01 11995.80 +- 986.70 60.87 +- 68.83 9.74 +- 42.51
Magnaflux Magnaflux, Glenview, IL, USA

Sep 21, 2017 (ppb or ppm) 627.90 ppb +- 19.51 ppb 1.31 ppm +- 0.23 pm 633.14 ppb +- 93.41 ppb 1.77 ppm +- 0.07 ppm 387.46 ppm +- 31.87 ppm








PICO 77 PICO-40L Style copper housings 165.8 g 4.944 Feb 22, 2018 (mBq/kg) 4.26 +- 5.46 233.59 +- 174.91 4.47 +- 7.41 0.11 +- 4.40 <78.20

<4.36

<1.01


Copper Piezo Cooper Housings


Feb 27, 2018 (ppb or ppm) 0.35 ppb +- 0.44 ppb 18.92 ppb +- 14.17 ppb 8.35 ppb +- 13.04 ppb 0.03 ppb +- 1.08 ppb <2.53 ppm










PICO 78 Includes LED ring, circuit boards and wiring 40.5 g 6.130 Dec 11, 2017 (mBq/kg) 761.50 +- 74.19 3175.49 +- 1475.29 84.04 +- 45.81 996.14 +- 84.45 141.51 +- 357.73 <31.51

<21.58


LED Ring Boards


Dec 18, 2017 (ppb or ppm) 61.68 ppb +- 6.01 ppb 257.22 ppb +- 119.50 ppb 147.90 ppb +- 80.63 ppb 245.05 ppb +- 20.78 ppb 4.57 ppm +- 11.55 ppm








PICO 79
13.0 g 16.743 Dec 18, 2017 (mBq/kg) <6.31

<482.00

<28.23

<3.16

<22.69

<2.39

<2.08

7Be Signal:
Light Diffuser Sheets


Jan 4, 2018 (ppb or ppm) <0.51 ppb

<39.04 ppb

<49.69 ppb

<0.78 ppb

<732.96 ppb







88.31 mBq/kg +- 74.15 mBq/kg
PICO 80 Includes copper, stainless steel and polyethylene 77.3 g 6.958 Apr 4, 2018 (mBq/kg) <5.58

<79.79

2.80 +- 4.55 5.52 +- 4.01 21.00 +- 46.04 <2.38

<1.67


Camera Mount and Cooling Ring Samples SS Part: L-0801-001
Copper Part: L-0801-011-A
Poly Part: L-0801-005-A

April 11,2018 (ppb or ppm) <0.45 ppb

<6.46 ppb

4.92 ppb +- 8.02 ppb 1.36 ppb +- 0.99 ppb 678.18 ppb +- 1487.14 ppb









Sample Description Manufacturer Mass (g) Live Time (days) Counting Dates
(if applicable)

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co
Comments
PICO 81
1023.7 g 5.771 Mar 29, 2018 (mBq/kg) 607.65 +- 16.45 547.12 +- 103.79 40.46 +- 3.31 277.98 +- 8.36 6559.54 +- 353.13 <2.60

<1.91


Alcojet Alconox Inc

Apr 4, 2018 (ppb or ppm) 49.22 ppb +- 1.33 ppb 44.32 ppb +- 8.41 ppb 71.20 ppb +- 5.82 ppb 68.38 ppb +- 2.06 ppb 212.87 ppm +- 11.05 ppm








PICO 82
24.8 g 7.834 Jan 15, 2018 (mBq/kg) <4.27

132.99 +- 232.22 7.34 +- 10.95 <5.12

<14.60

<1.61

<3.63

58Co Signal:
Copper Solder Wire
(coated with tin)


Jan 23, 2018 (ppb or ppm) <0.35 ppb

10.77 ppb +- 18.81 ppb 12.92 ppb +- 19.27 ppb <1.26 ppb

<471.48 ppb







5.69 mBq/kg +- 4.27 mBq/kg
PICO 83
56.2 g 7.712 Jan 23, 2018 (mBq/kg) <2.30

68.39 +- 53.67 1.39 +- 3.62 <2.76

<4.59

<0.48

<0.75


Copper Mesh


Jan 31, 2018 (ppb or ppm) <0.19 ppb

5.54 ppb +- 4.35 ppb 2.44 ppb +- 6.38 ppb <0.68 ppb

<148.28 ppb










PICO 84 Piezo Assemblies to be used for PICO-40L 1934.6 g 6.729 Apr 27, 2018 (mBq/kg) 37.88 +- 2.77 154.49 +- 87.72 9.90 +- 2.71 72.16 +- 3.57 136.20 +- 20.70 0.15 +- 1.20 0.76 +- 0.64
Complete Piezo Assembly


May 4, 2018 (ppb or ppm) 3.07 ppb +- 0.22 ppb 12.51 ppb +- 7.11 ppb 17.42 ppb +- 1.77 ppb 17.75 ppb +- 0.88 ppb 4.40 ppm +- 0.67 ppm








PICO 85 Two part epoxy 96.2 g 4.819 May 11, 2018 (mBq/kg) 6779.10 +- 179.73 8060.39 +- 1250.87 358.85 +- 31.49 13622.06 +- 284.39 9950.98 +- 682.61 <28.95

8.83 +- 17.06
3M Scotch-Weld 1838 B/A Green 3M Industrial Adhesives and Tapes Division,
St Paul, MN

May 16, 2018 (ppb or ppm) 549.11 ppb +- 14.56 ppb 652.89 ppb +- 101.32 ppb 631.58 ppb +- 55.42 ppb 3.35 ppm +- 0.07 ppm 321.42 ppm +- 22.05 ppm








PICO 86 Titanium used for flange around base of synthetic quartz jar. 295.0 g 6.764 Dec 12, 2018 (mBq/kg) <5.32

<160.13

3.05 +- 4.56 15.36 +- 4.74 185.09 +- 53.02 <3.92

<0.65


Titanium


Dec 19, 2018 (ppb or ppm) <0.43 ppb

<12.97 ppb

5.37 ppb +- 8.02 ppb 3.78 ppb +- 1.17 ppb 5.98 ppm +- 1.71 ppm









Additional Activities:
(mBq/kg)





228Ac: 6.26 +- 7.55











(ppb or ppm)




(Not in Equilibrium with other Th daughters) 1.54 ppb +- 1.86 ppb









PICO 87 Copper used for inner heater tower 282.4 g 11.361 May 30, 1019 (mBq/kg) 1.02 +- 1.30 38.61 +- 42.97 <2.04

<0.87

<8.02

<1.99

<0.25


Copper Machined at U de M

Jun 11, 2019 (ppb or ppm) 0.08 ppb +- 0.11 ppb 3.13 ppb +- 3.48 ppb <3.59 ppb

<0.21 ppb

<0.26 ppm










PICO 88 Potassium sodium tartrate tetrahydrate 31.1 g 2.005 Sep 10, 2018 (mBq/kg) <190.20

<11340.00

<608.30

<103.10

5560700.00 +- 285100.00 <663.20

<486.30


Rochelle Salt Crystal


Sep 12, 2018 (ppb or ppm) <15.41 ppb

<918.54 ppb

<1070.61 ppb

<25.36 ppb

17.96 % +- 0.92 %








PICO 89 (Scintillating Bubble Chamber) Camera: ID: 106752-16
SN: 2274565 and 22728402 		258.8 g 2.375 Nov 23, 2018 (mBq/kg) 1955.00 +- 86.98 5533.00 +- 1405.00 233.90 +- 71.85 802.58 +- 52.39 117387.94 +- 6155.33 <31.78

<38.97


Basler Cameras and Lenses (powered by Fujinon) Lense ID:
C125-0418-5M
SN: 1L500096 and 1L500116

Nov 26, 2018 (ppb or ppm) 158.36 ppb +- 7.05 ppb 448.17 ppb +- 113.81 ppb 411.66 ppb +- 126.46 ppb 197.43 ppb +- 12.89 ppb 3791.63 ppm +- 198.82 ppm













(mBq/kg)

138La: 7000.00 +- 297.70

227Ac: 11120.00 +- 389.30














(ppb or ppm)






(Not in Equilibrium with top of 235U chain 1.96 ppm +- 0.07 ppm











PICO 90 (Scintillating Bubble Chamber) Lense ID: C125-0418-5M SN: 1L500096 and 1L500116 111.0 g 3.931 Nov 26, 2018 (mBq/kg) 2482.00 +- 138.80 12390.00 +- 2694.00 1277.00 +- 158.20 1346.00 +- 74.01 112970.00 +- 5952.00 20.82 +- 39.45 <69.48


Basler Lenses (powered by Fujinon)
(55.5 g per lens)
Nov 30, 2018 (ppb or ppm) 201.04 ppb +- 11.24 ppb 1003.59 ppb +- 218.21 ppb 2247.52 ppb +- 278.43 ppb 331.12 ppb +- 18.21 ppb 3648.93 ppm +- 192.25 ppm













(mBq/kg)

138La: 22890.00 +- 901.40 .
227Ac: 42290.00 +- 1255.00














(ppb or ppm)






(Not in Equilibrium with top of 235U chain 7.44 ppm +- 0.22 ppm












Sample Description Manufacturer Mass (g) Live Time (days) Counting Dates
(if applicable)

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co
Comments
PICO 91 (Scintillating Bubble Chamber) Camera: ID: 106752-16
SN: 2274565 and 22728402 		147.8 g 4.917 Nov 30, 2018 (mBq/kg) 1908.00 +- 59.04 245.60 +- 496.50 156.10 +- 30.35 1337.00 +- 54.99 8575.90 +- 570.30 <32.56

<16.20


Basler Cameras
(73.9 g per camera)
Dec 5, 2018 (ppb or ppm) 154.55 ppb +- 4.78 ppb 19.89 ppb +- 40.22 ppb 274.74 ppb +- 53.42 ppb 328.9 ppb +- 13.53 ppb 277 ppm +- 18.42 ppm













(mBq/kg)

138La: <9.04

.
227Ac: 279.10 +- 61.69














(ppb or ppm)






(Not in Equilibrium with top of 235U chain 491.22 ppb +- 108.57 ppb











PICO 92
85.9 g 6.701 Sep 16, 2019 (mBq/kg) <11.63

<322.40

13.03 +- 6.64 <12.89

<101.40

15.16 +- 9.20 0.36 +- 3.31
Low Temperature Tygon Tubing


Sep 23, 2019 (ppb or ppm) <0.94 ppb

<26.11 ppb

22.93 ppb +- 11.69 ppb <3.17 ppb

<3.28 ppm










PICO 93 This wash was done after the source was received and swiped for alpha counting 156.2 g 3.993 Mar 29, 2019 (mBq/kg) 5.19 +- 5.83 <159.50

<11.15

<7.88

<26.39

71.85 +- 10.29 78.06 +- 8.02
60Co Calibration Source
UPW Wash 1


Apr 2, 2019 (ppb or ppm) 0.42 ppb +- 0.47 ppb <12.92 ppb

<19.62 ppb

<1.94 ppb

<0.85 ppm










PICO 94 This wash was done after the first encapsulation 137.1 g 5.819 Apr 2, 2019 (mBq/kg) <3.10

22.41 +- 77.38 <4.84

<2.97

<40.24

<2.83

<0.94


60Co Calibration Source
UPW Wash 2


Apr 8, 2019 (ppb or ppm) <0.25 ppb

1.82 ppb +- 6.27 ppb <8.52 ppb

<0.73 ppb

<1.3 ppm










PICO 95 This wash was done after the second encapsulation 128.9 g 6.875 Apr 8, 2019 (mBq/kg) 8.44 +- 4.49 <143.50

13.57 +- 5.96 4.37 +- 4.18 40.85 +- 42.14 <2.04

<0.82


60Co Calibration Source
UPW Wash 3


Apr 15, 2019 (ppb or ppm) 0.68 ppb +- 0.36 ppb <11.62 ppb

23.88 ppb +- 10.49 ppb 1.07 ppb +- 1.03 ppb 1.32 ppm +- 1.36 ppm








PICO 96 This wash was done after all encapsulations, swipes and leak checks are completed. 140.5 g 6.618 Apr 16, 2019 (mBq/kg) <4.92

<145.30

1.67 +- 5.39 <6.46

<38.75

<4.32

0.65 +- 1.49
60Co Calibration Source
UPW Leach Water

Apr 23, 2019 (ppb or ppm) <0.4 ppb

<11.77 ppb

2.93 ppb +- 9.49 ppb <1.59 ppb

<1.25 ppm










PICO 97 Heraeus PN 93800 SUP 300
Order # 1701566 Charge # 17045510		 56.8 g 9.673 May 17, 2019 (mBq/kg) <9.39

77.30 +- 172.90 9.36 +- 9.80 <10.15

<72.41

8.88 +- 6.87 <3.98


Fused Silica Synthetic Quartz Made on 12/11/17

May 27, 2019 (ppb or ppm) <0.59 ppb

6.26 ppb +- 14 ppb 16.47 ppb +- 17.25 ppb <2.5 ppb

<2.34 ppm










PICO 98 Lot No. USRC900 DEC2020 728.9 g 11.882 Nov 29, 2019 (mBq/kg) 3.26 +- 0.78 <16.61

<0.54

2.33 +- 0.95 3.73 +- 6.65 <0.69

<0.31


Synthetic Oil SPECTRASYN2 ExxonMobile Oil Corp. - Synthetics

Dec 11, 2019 (ppb or ppm) 0.26 ppb +- 0.06 ppb <1.35 ppb

<0.95 ppb

0.57 ppb +- 0.23 ppb 120.56 ppb +- 214.8 ppb













(mBq/kg)





228Ac: 0.24 +- 1.16
7Be: 5.70 +- 4.63








(ppb or ppm)




(Not in Equilibrium with other Th daughters) 0.06 ppb +- 0.28 ppb










PICO 99 Lot No. B18C005 755.7 g 7.833 Dec 11, 2019 (mBq/kg) 1.82 +- 0.83 <32.73

<0.71

<1.02

<7.78

<0.92

<0.40

7Be
Synthetic Oil SPECTRASYN6 ExxonMobile Oil Corp. - Synthetics

Dec 19, 2019 (ppb or ppm) 0.15 ppb +- 0.07 ppb <2.65 ppb

<1.25 ppb

<0.25 ppb

<251.29 ppb







5.43 mBq/kg +- 4.99 mBq/kg
PICO 100
427.0 g 13.680 Sep 22, 2020 (mBq/kg) <1.48

<46.01

0.77 +- 0.68 <0.74

52.15 +- 16.44 <1.95

<0.93


RTD/Piezo Signal Cables


Oct 6, 2020 (ppb or ppm) <119.88 ppt

<3.73 ppb

1.36 ppb +- 1.19 ppb <182.04 ppt

1684.51 ppb +- 531.01 ppb








PICO 101 Basler ACA-1920-155um
ID: 106879-11		 197.5 g 6.854 Jan 20, 2021 Results:
238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co
Comments
PICO 40L Camera and Lens Kowa Lens: LMV24411
SN: 16R0012125

Jan 27, 2021 (mBq/kg) 759.70 +- 25.08 1850.00 +- 475.30 69.19 +- 6.39 344.60 +- 18.93 13742.00 +- 733.70 15.22 +- 8.40 6.79 +- 6.66





(ppm / ppb / ppt) 61.54 ppb +- 2.03 ppb 149.85 ppb +- 38.5 ppb 121.77 ppb +- 11.24 ppb 84.77 ppb +- 4.66 ppb 443.87 ppm +- 23.7 ppm












Results:
7Be:

54Mn




228Ac:
138La
227Ac











(mBq/kg) 52.15 +- 65.78 22.14 +- 7.48


335.70 +- 31.14 7397.00 +- 272.70 271.10 +- 27.56










(ppm / ppb / ppt)








82.58 ppb +- 7.66 ppb


477.14 ppb +- 48.51 ppb





PICO 102 BLU-25751704
Lot 210421
1/16 “ x 7”		 252.5 g 5.965 Nov 13, 2021 Results:
238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co
Comments
Tungsten Ceriated Welding Electrodes Air Liquide, Blueshield,
Made in China

Nov 19, 2021 (mBq/kg) 102.40 +- 7.55 <386.70

9.78 +- 5.27 74.00 +- 8.29 <52.57

<6.08

<2.53



Sample contains 40 electrodes
Run: 21113
(ppm / ppb / ppt) 8.29 ppb +- 0.61 ppb <31.32 ppb

17.21 ppb +- 9.27 ppb 18.2 ppb +- 2.04 ppb <1.7 ppm














Results:
7Be:

54Mn




228Ac:















(mBq/kg) 56.92 +- 27.03 <4.30




77.47 +- 11.67
















(ppm / ppb / ppt)








19.06 ppb +- 2.87 ppb











PICO 103 BLU-25751706 Lot 210318
3/32 “ x 7”		 575.3 g 6.819 Nov 19, 2021 Results:
238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co
Comments
Tungsten Ceriated Welding Electrodes Air Liquide, Blueshield, Made in China

Nov 26, 2021 (mBq/kg) 870.70 +- 23.30 <306.10

19.09 +- 8.48 146.90 +- 9.95 19.59 +- 24.93 <2.58

<2.63



Sample contains 40 electrodes
Run: 21119
(ppm / ppb / ppt) 70.53 ppb +- 1.89 ppb <24.79 ppb

33.6 ppb +- 14.93 ppb 36.14 ppb +- 2.45 ppb 0.63 ppm +- 0.81 ppm












Results:
7Be:

54Mn




228Ac:















(mBq/kg) <57.40

4.93 +- 3.32


393.00 +- 20.73
















(ppm / ppb / ppt)








96.68 ppb +- 5.1 ppb











PICO 104 BLU-25751708 Lot 21420
1/8 “ x 7”		 1538.95 g 6.868 Nov 26, 2021 Results:
238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co
Comments
Tungsten Ceriated Welding Electrodes Air Liquide, Blueshield, Made in China

Dec 3, 2021 (mBq/kg) 993.90 +- 23.43 101.50 +- 191.80 14.33 +- 11.44 201.40 +- 10.24 91.93 +- 21.61 <1.98

1.76 +- 1.39

Sample contains 60 electrodes
Run: 211126
(ppm / ppb / ppt) 80.51 ppb +- 1.9 ppb 8.22 ppb +- 15.54 ppb 25.22 ppb +- 20.13 ppb 49.54 ppb +- 2.52 ppb 2.97 ppm +- 0.7 ppm












Results:
7Be:

54Mn




228Ac:















(mBq/kg) 69.81 +- 30.15 6.09 +- 2.66


738.10 +- 29.85
















(ppm / ppb / ppt)








181.57 ppb +- 7.34 ppb











PICO 105 CeramTec Inc
PN: 25522-01-W
Material No: 1025050		 71.2 g 13.729 Feb 25, 2022 Results:
238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co
Comments
CeramTec Weldable Solder Cups 6 Units 11.87 g / unit Run: 220225 Mar 11, 2022 (mBq/kg) 33.39 +- 5.69 147.40 +- 247.40 0.63 +- 2.50 34.10 +- 6.94 8491.10 +- 492.80 <7.52

10.05 +- 4.19





(ppm / ppb / ppt) 2.7 ppb +- 0.46 ppb 11.94 ppb +- 20.04 ppb 1.11 ppb +- 4.4 ppb 8.39 ppb +- 1.71 ppb 274.26 ppm +- 15.92 ppm












Results:
7Be:

54Mn




228Ac:















(mBq/kg) <30.88

3.29 +- 3.62


38.05 +- 12.35
















(ppm / ppb / ppt)








9.36 ppb +- 3.04 ppb











PICO 106
18.7 g 13.777 Apr 25, 2022 Results:
238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co
Comments
Heat Shrink Tubing

Run: 220425 May 9, 2022 (mBq/kg) <17.91

457.10 +- 409.80 <17.25

<25.25

10.37 +- 164.30 <29.63

<4.70







(ppm / ppb / ppt) <1.45 ppb

37.03 ppb +- 33.19 ppb <30.36 ppb

<6.21 ppb

0.34 ppm +- 5.31 ppm












Results:
7Be:

54Mn




228Ac:















(mBq/kg) <100.80

<3.68




<39.27


















(ppm / ppb / ppt)








<9.66 ppb













PICO 107 Kapton Circular PCBs 6.15 g 14.944 Sep 1, 2022 Results:
238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co
Comments
PICO Standard Gain Preamps V2 26 units 0.23654 g / unit Run: 220901
220906		 Sep 16, 2022 (mBq/kg) 268.10 +- 45.75 <1779.00

19.75 +- 18.82 156.30 +- 50.33 1754.80 +- 621.90 <36.83

<10.52







(ppm / ppb / ppt) 21.72 ppb +- 3.71 ppb <144.1 ppb

34.76 ppb +- 33.12 ppb 38.45 ppb +- 12.38 ppb 56.68 ppm +- 20.09 ppm












Results:
7Be:

54Mn




228Ac:















(mBq/kg) <269.50

<23.90




261.90 +- 78.56
















(ppm / ppb / ppt)








64.43 ppb +- 19.33 ppb











PICO 108 Grinding Disks for Stainless Steel 961.8 g 2.879 Mar 17, 2023 Results:
238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co
Comments
Grinding Disks Walter Surface Technologies (10 disks) Run: 230317 Mar 20, 2023 (mBq/kg) 19360.00 +- 383.60 38720.00 +- 2947.00 950.10 +- 36.09 50230.00 +- 1191.00 352240.00 +- 18010.00 <44.35

9.96 +- 20.91

SN: 08-F 513
Size: 5” x 1/8” x 7/8”
Pack ID: 220308


(ppm / ppb / ppt) 1568.16 ppb +- 31.07 ppb 3136.32 ppb +- 238.71 ppb 1672.18 ppb +- 63.52 ppb 12356.58 ppb +- 292.99 ppb 11377.35 ppm +- 581.72 ppm












Results:
7Be:

54Mn




228Ac:















(mBq/kg) 371.08 +- 275.10 577.92 +- 42.77


45640.00 +- 1104.00
















(ppm / ppb / ppt)








11227.44 ppb +- 271.58 ppb











PICO 109 Cutting Disks for Stainless Steel 889.8 g 3.823 Jun 9, 2023 Results:
238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co
Comments
Cutting Disks United Abrasives
Type: XA24Q
PN: 24315 		(10 disks) Run: 230609 Jun 13, 2023 (mBq/kg) 86800.00 +- 1594.00 120800.00 +- 6748.00 4044.00 +- 100.60 110000.00 +- 2586.00 466590.00 +- 238500.00 <16.07

<21.85







(ppm / ppb / ppt) 7030.8 ppb +- 129.11 ppb 9784.8 ppb +- 546.59 ppb 7117.44 ppb +- 177.06 ppb 27060 ppb +- 636.16 ppb 15070.86 ppm +- 7703.55 ppm












Results:
7Be:

54Mn




228Ac:















(mBq/kg) 1534.90 +- 395.20 1239.90 +- 75.72


100800.00 +- 2377.00
















(ppm / ppb / ppt)








24796.8 ppb +- 584.74 ppb











PICO 110 Uponor AquePEX White Pipe 89.5 g 7.854 Jan 25, 2024 Results:
238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co
Comments
Uponor PEX White Piping Part No: F192200
Run: 240125 Feb 2, 2024 (mBq/kg) <9.19

101.90 +- 349.10 <12.84

<22.31

258.16 +- 156.70 <17.47

<3.47



Uponor North America Inc


(ppm / ppb / ppt) <0.74 ppb

8.25 ppb +- 28.28 ppb <22.6 ppb

<5.49 ppb

8.34 ppm +- 5.06 ppm












Results:
7Be:

54Mn




228Ac:















(mBq/kg) <68.95

<11.57




<29.28


















(ppm / ppb / ppt)








<7.2 ppb













PICO 111 ProPEX Coupler 113.7 g 6.916 Feb 2, 2024 Results:
238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co
Comments
Uponor ProPEX Coupler Type: Q4662020
Lot No: 1024505
Run: 240202 Feb 9, 2024 (mBq/kg) <6.06

<478.40

<5.05

14.48 +- 7.86 1829.00 +- 203.00 <6.20

<4.95



Uponor North America Inc


(ppm / ppb / ppt) <0.49 ppb

<38.75 ppb

<8.89 ppb

3.56 ppb +- 1.93 ppb 59.08 ppm +- 6.56 ppm












Results:
7Be:

54Mn




228Ac:















(mBq/kg) <18.51

<3.02




<14.77


















(ppm / ppb / ppt)








<3.63 ppb













In Progress and To Be Measured:



























Sample Description Manufacturer Mass (g) Live Time (days) Counting Dates
(if applicable)






















PICO 112


Apr 28, 2025 Results:
238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co
Comments
Welding Wire



(mBq/kg)


























(ppm / ppb / ppt)



























Results:
7Be:

54Mn




228Ac:















(mBq/kg)




























(ppm / ppb / ppt)























Next Sample



Results:
238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co
Comments




(mBq/kg)


























(ppm / ppb / ppt)



























Results:
7Be:

54Mn




228Ac:















(mBq/kg)




























(ppm / ppb / ppt)