United States	Office of Research and	EPA/600/R-99/074
Environmental Protection	Development	August 1999
Agency	Washington, DC 20460
Results from EPA's Drinking
Water Radiochemistry
Performance Evaluation
Studies for Calendar Year 1996

-------
TECHNICAL REPORT DATA
1. Report No.
EPA/600/R-99/6?* <77
2
3. Recipient's Accession No.
4. Title and Subtitle
Results from EPA's Drinking Water Radiochemistry Performance Evaluation Studies for
Calendar Year 1996
5. Report Date
01/01/96 -12/31/96
6. Performing Organization Code
7. Author(s)
Pia.S. H.
8. Performing Organization Report
No. (TIP#)
NERL-LV 99-101
9. Performing Organization Name & Address
U.S. EPA, Office of Research & Development, National Exposure Research Laboratory
Environmental Sciences Division, Environmental Chemistry Branch
944 E. Harmon Ave.
Las Vegas, NV 89119
10. Program Element Number
11. Contract/Grant No.
12. Sponsoring Agency Name & Address
U.S. EPA, Office of Research & Development, National Exposure Research Laboratory
Environmental Sciences Division, Environmental Chemistry Branch
944 E. Harmon Ave.
Las Vegas, NV 89119
13. Type of Report & Period Covered
Radiation QA, CY 1996
14. Sponsoring Agency Code
EPA 600/07
15. Supplemental Notes or Complete Citation!
Pia, S.H. Results from EPA's Radiation Performance Evaluation (Drinking Water/QA) Studies for Calendar
Year 1993, Las Vegas, NV:U.S. Environmental Protection Agency, 1993 (Rereleased 1999)
16. Abstract
Notice of termination of EPA's radiochemistry performance evaluation program was announced in the Federal
Register on June 12, 1997 (62:113). Therefore, as of March 1999, all technical assistance available from the
radiochemistry component at the EPA in Las Vegas, NV, is terminated.
The following report contains in chronological order the results for radiochemistry studies for the period indicated.
The results are organized by radiochemistry study title and date and under each title a summary report. The
summary report contains the laboratory code for each participant, the triplicate results submitted by each participant,
the average of the submitted results, and summary statistics. Introducing each report is a discussion of the statistics
and the scoring criterion.
We are providing this report to assist organizations interested in an historical account of radiochemistry Performance
Evaluation Studies. Mention of trade names, corporate names or commercial products does not constitute
endorsement or recommendation by EPA.
17. Key Words and Document Analysis
a. Descriptors:
PE Studies, PE, radiochemistry, gross alpha, gross
beta, strontium, tritium, plutonium, uranium, radium,
gamma, mixed gamma, blind, iodine, air filter,
radioactivity
b. Identifiers/Open-ended Terms
c. COSATI
18 Distribution Statement
RELEASE TO THE PUBLIC
19 Security Class (This Report)
UNCLASSIFIED
21 No of Pages
455
20. Security Class (This Page)
UNCLASSIFIED
22. Price
EPA 2220-1

-------
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-------
United States	Office of Research and	EPA/600/R-96/048
Environmental Protection	Development	April 1996
Agency	Washington, DC 20460
&EPA Strontium in Water
Performance
Evaluation Study
A Statistical Evaluation of
the January 23, 1996 Data
023RSL96 cov-048

-------
Strontium in Water
Performance Evaluation Study
January 23, 1996
Environmental Protection Agency
National Exposure Research Laboratory
Characterization Research Division
Las Vegas, Nevada

-------
UNITED STATES ENVIRONMENTAL PROTECTION AGENCY
OFFICE OF RESEARCH AND DEVELOPMENT
NATIONAL EXPOSURE RESEARCH LABORATORY
CHARACTERIZATION RESEARCH DIVISION-LAS VEGAS
P.O. BOX 93478
LAS VEGAS, NEVADA 89193-3478
(702/798-2100)
Dear Participant,
Enclosed are the results of the Analytical Sciences Branch (CRD-LV)
Performance Evaluation Study for Strontium in Water; January 23, 1996.
The known value for each analysis was determined by gravimetric methods,
checked by chemical analyses performed by CRD-LV's Radiochemistry Laboratory,
and compared to the participating laboratories' grand average.
The expected precision, determined by the known value, was taken from
'Table 3. Laboratory Precision: One Standard Deviation Values and Control Limits
for Various Analyses", which is based on data accumulated over the years by the
Performance Evaluation Program, and can be found in the Environmental Radioactivity
Performance Evaluation Studies Program and Radioactive Standards Distribution
Program information brochure.
Please take a few minutes to review this report and the analytical data your
laboratory submitted to us. If there are any apparent discrepancies, please notify us
immediately.
We encourage you to make use of the computer-automated data-entry system
that has been in place for some time now. As the number of participants increases,
and it becomes unrealistic for us to receive results by mail or FAX, the computer
system will be our only avenue for accepting data.
If you have any questions or comments, please send a message via the data-entry
system or contact George Dilbeck at 702/798-2104 or Patricia Honsa at 702/798-2141.
George Dilbeck
Team Leader
RADQA Program
Enclosure

-------
NOTICE
This material has been funded wholly by
the U.S. Environmental Protection Agency.
It has been subjected to the Agency's review,
and has been approved for publication as
an EPA document.

-------
CRD-LV Performance Evaluation: Strontium in Water, 23-Jan-1996	1/12
The following pages consist of separate sections for each of the nuclides in this study with four
parts per section. After the first, each part is separated from the next by a new page or a thick
horizontal bar. The first page of each section is a statistical summary for the nuclide and starts
with a statement of the known value, the control limits, and the warning limits.
The warning limits are placed at two normalized standard deviations above and below the
known value and the control limits are three normalized standard deviations above and below
the known value. If you keep control charts, these values will be useful for anticipating problems
with the accuracy of your analytical methods.
The coin shaped pie chart at the top of the summary page shows the fate of all the samples
sent out in number and percentage terms. The pie chart starts at the top and rotates clockwise.
The first sector represents those participants who submitted analytical results within both the
warning and control limits. The next sector represents those who are in the warning region but
not out of control. The third sector represents those who are out of control, but have passed
the outlier test. The fourth sector represents those who have failed the outlier test. The last
sector represents those participants who have failed to respond properly. This is the case if no
analytical results were returned, or less than three determinations were reported, or if the results
were received too late. The reeding on the edge of the coin is spaced at one percent intervals, and
the sector shading becomes darker as the data reliability decreases. Sectors with zero width are
not shown.
The table in the center shows a number of statistical quantities calculated from the submitted
data based on the mean and median values in relation to the known value, both before and after
outlier removal. The lower pie chart uses the same construction as the upper chart and shows
the distribution of properly submitted data in terms of deviation from the known value divided
into sectors representing one, two, three, and greater than three normalized standard deviations.
The second part is em alphabetical listing, in lab-code order, of submitted data and several
calculated quantities. An entry that is shaded has been rejected because of one of the reasons
listed above or failure of the outlier test. The fifth and sixth columns are a measure of laboratory
precision. The Range analysis is a normalized value that you may use to keep precision control
charts. If this value is between 2.0 and 3.0, your analytical process precision is in the warning
zone; if it exceeds 3.0 it is out of control. The eighth and ninth columns are the differences from
the mean of all non-outliers and from the known value, respectively. A tag symbol may appear in
the last column. Each page with tags has a symbol definition summary at the bottom. If there is
no tag symbol, the data is within the control limits, but it may be in the warning zone.
The third part is a three-column listing of result average, tag symbol, and lab-code in average
order excluding those labs not responding properly. In this order, all outliers and out-of-control
results appear at the top or bottom of the list.
The last part is two bar chart displays showing frequency distributions of responding
participants. The first chart places the known value at the center and a bar at each 0.2 unit of
expected precision. The second chart places the mean of the reported measurements at the center
and a bar at each 0.2 unit of standard deviation. In both cases, a bar includes those results within
0.1 unit up to the maximum of six. Any results more than six units from the center value are
shown cumulatively by a shaded bar one past the sixth unit. If the central tendency of the known
value distribution falls away from the center, an error in accuracy is indicated. If the distribution
is broad, poor precision is indicated. The mean value distribution is similar but uses the average
and standard deviation of reported results as its basis.

-------
2/12	CRD-LV Performance Evaluation: Strontium in Water, 23-Jan-1996
The Range Analysis(R + SR) is calculated from the range, mean range and standard error of
the range values. The range is the difference between the maximum and minimum results for the
laboratory. The mean range is calculated by multiplying the expected precision by 1.693(for three
results). The standard error of the range is calculated by multiplying the mean range by 2.575(for
three results), subtracting the mean range from this product, and dividing the result by 3. If the
range is greater than the mean range, then the range analysis is calculated by subtracting the
mean range from the range, dividing the result by the standard error of the range and adding 1.
If the mean range is greater than or equal to the range, then the range analysis is calculated by
dividing the range by the mean range.
The normalized deviation of the mean from the grand average is calculated from the deviation
of the mean from the grand average and the standard error of the mean values. The deviation of
the mean from the grand average is calculated by subtracting the grand average from the
average of the laboratory's three results. The standard error of the mean is calculated by
dividing the expected precision by the square root of 3(the number of results). The normalized
deviation of the mean from the grand average is calculated by dividing the deviation of the mean
from the grand average by the standard error of the mean.
The normalized deviation of the mean from the known value is calculated from the deviation of
the mean from the known value and the standard error of the mean values. The deviation of the
mean from the known value is calculated by subtracting the known value from the average of the
laboratory's three results. The standard error of the mean is calculated by dividing the expected
precision by the square root of 3(the number of results). The normalized deviation of the mean
from the known value is calculated by dividing the deviation of the mean from the known value by
the standard error of the mean.
A complete explanation of the statistical calculations involved in the report may be found in
the Environmental Radioactivity Performance Evaluation Studies Program information brochure
[Draft Revision of EPA-600/4-81-004], available from Patricia Honsa, CRD-LV, 702/798-2141.

-------
CRD-LV Performance Evaluation: Strontium in Water, 23-Jan-1996
3/12
Strontium-89	Statistical Summary	98 Participants
The known value of this nuclide is 73.0 pCi/1 with an expected precision of 5.0; the control limits
are 64.3 to 81.7; the warning regions are 64.3 to 67.2 and 78.8 to 81.7
16(16.3 %) Failed to respond
5(5.1 %) Outliers*'
25(25.5 %) Out of control •'
but not an outlier
Statistic
. 39(39.8 %) Within all limits
Respondents
13(13.3 %) In warning zone
but within control
Non-outliers
Mean
70.38
Grand Avg 70.58
Std. Dev.
18.99
9.14
Variance
360.60
83.56
% Coef. of Var.
26.98
12.95
% deviation of mean from known value
-3.59
-3.32
Norm. dev. of mean from known value
-0.14
-0.27
Median
72.17
72.33
% deviation of median from known value
-1.14
-0.91
Norm. dev. of median from known value
-0.04
-0.07
30(36.6 %) More than 3 norm. S.D. •
13(15.9 %) Between 2 and 3 norm. S.D.
. 23(28.0 %) Within 1 norm. S.D.
»
of known value
• 16(19.5 %) Between 1 and 2 norm. S.D.

-------
f' 	
4/12 CRD-LV Performance Evaluation: Strontium in Water,
V	
23-Jan-1996

	1]
¦
Strontium-89








Lab
Res. 1
Res. 2

Exper.
Rng anal

Normalized deviation

Res. 3
Sigma
(R + SR)
Average
(grand-avg)
(known) Tag
A
76.0
73.0 '
73.0
1.73
0.354
74.00
1.19
0.35

AE
73.0
74.0
73.0
0.58
0.118
73.33
0.96
0.12

AF
73.0
73.0
71.0
1.15
0.236
72.33
0.61
-0.23

AJ
80.0
58.0
68.0
11.02
4.046
68.67
-0.66
-1.50

AK
75.0
74.0
72.0
1.53
0.354
73.67
1.07
0.23

AL








•
AU
4.0
4.0
4.0
0.00
0.000
4.00
-23.06
-23.90
X
AW
75.0
78.0
78.0
1.73
0.354
77.00
2.23
1.39

AY








•
AZ
75.0
76.0
73.0
1.53
0.354
74.67
1.42
0.58

BA
71.0
81.0
76.0
5.00
1.345
76.00
1.88
1.04

BB








•
BC
55.0
59.0
58.0
2.08
0.473
57.33
-4.59
-5.43

BG








•
BH
86.0
89.0
83.0
3.00
0.709
86.00
5.34
4.50
ft
BL
76.0
75.0
72.0
2.08
0.473
74.33
1.30
0.46

BM
75.0
73.0
74.0
1.00
0.236
74.00
1.19
0.35

BO
71.0
71.0
70.0
0.58
0.118
70.67
0.03
-0.81

C
81.0
79.0
77.0
2.00
0.473
79.00
2.92
2.08

CA








•
CE








•
CG
82.0
82.0
80.0
1.15
0.236
81.33
3.73
2.89

CJ
70.0
76.0
75.0
3.21
0.709
73.67
1.07
0.23

CK
79.0
76.0
74.0
2.52
0.591
76.33
1.99
1.15

CO
54.0
54.0
58.0
2.31
0.473
55.33
-5.28
-6.12
11
CS
70.0
68.0
69.0
1.00
0.236
69.00
-0.55
-1.39

CX
n
70.0
62.0
70.0
4.62
0.945
67.33
-1.12
-1.96

JLr
DD
70.0
67.0
72.0
2.52
0.591
69.67
-0.31
-1.15
•
DE
70.0
70.0
71.0
0.58
0.118
70.33
-0.08
-0.92

DO
70.0
59.0
67.0
5.69
1.570
65.33
-1.82
-2.66

DT
58.0
63.0
63.0
2.89
0.591
61.33
-3.20
-4.04
11
DZ
80.0
85.0
85.0
2.89
0.591
83.33
4.42
3.58
It
E
76.0
77.0
75.0
1.00
0.236
76.00
1.88
1.04

EB
61.0
64.0
62.0
1.53
0.354
62.33
-2.86
-3.70
u
EL
79.0
78.0
81.0
1.53
0.354
79.33
3.03
2.19

FZ








•
GQ
47.0
48.0
50.0
1.53
0.354
48.33
-7.71
-8.54
11
HK
65.0
66.0
65.0
0.58
0.118
65.33
-1.82
-2.66

HP
92.0
95.0
91.0
2.08
0.473
92.67
7.65
6.81
ft
I
69.0
69.0
68.0
0.58
0.118
68.67
-0.66
-1.50

J
77.0
76.0
76.0
0.58
0.118
76.33
1.99
1.15

JE
60.0
60.0
60.0
0.00
0.000
60.00
-3.66
-4.50
11
JG








•
JS
60.0
65.0
65.0
2.89
0.591
63.33
-2.51
-3.35
11
• =
No data submitted

TAG SYMBOLS

ft = Above control limit
[0 =
Insufficient data
x =
Determined to be an outlier
11 = Below control limit
				

-------
CRD-LV Performance Evaluation: Strontium in Water, 23-Jan-1996 5/12
Strontium-89
Lab Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known) Tag
JY
64.0
75.0
65.0
6.08
1.570
68.00
-0.89
-1.73

K
54.0
55.0
54.0
0.58
0.118
54.33
-5.63
-6.47
li
KH
73.0
71.0
72.0
1.00
0.236
72.00
0.49
-0.35

KL
81.0
78.0
79.0
1.53
0.354
79.33
3.03
2.19

L
73.0
73.0
74.0
0.58
0.118
73.33
0.96
0.12

LF
77.0
75.0
74.0
1.53
0.354
75.33
1.65
0.81

LT
79.0
94.0
94.0
8.66
2.470
89.00
6.38
5.54
tr
M
24.0
25.0
25.0
0.58
0.118
24.67
-16.90
-16.74
X
N
67.0
68.0
65.0
1.53
0.354
66.67
-1.35
-2.19

NJ
72.0
76.0
74.0
2.00
0.473
74.00
1.19
0.35

NO
74.0
74.0
72.0
1.15
0.236
73.33
0.96
0.12

NT
83.0
83.0
84.0
0.58
0.118
83.33
4.42
3.58
IT
OA
64.0
65.0
70.0
3.21
0.709
66.33
-1.47
-2.31

PB
80.0
80.0
80.0
0.00
0.000
80.00
3.26
2.42

PV
16.0
12.0
18.0
3.06
0.709
15;33
-19;14
-19.98
X
Q
79.0
80.0
80.0
0.58
0.118
79.67
3.15
2.31

QJ








w
QU
65.0
62.0
62.0
1.73
0.354
63.00
-2.62
-3.46
U
QW
64.0
62.0
63.0
1.00
0.236
63.00
-2.62
-3.46
U
QZ
68.0
66.0
67.0
1.00
0.236
67.00
-1.24
-2.08

R
57.0
61.0
59.0
2.00
0.473
59.00
-4.01
-4.85
U
RF
67.0
68.0
69.0
1.00
0.236
68.00
-0.89
-1.73

RR
74.0
74.0
74.0
0.00
0.000
74.00
1.19
0.35

S
76.0
77.0
77.0
0.58
0.118
76.67
2.11
1.27

sc
70.0
68.0
72.0
2.00
0.473
70.00
-0.20
-1.04

SD
72.0
84.0
93.0
10.54
3.821
83.00
4.30
3.46
ft
SF
60.0
59.0
59.0
0.58
0.118
59.33
-3.89
-4.73
U
SI
82.0
78.0
78.0
2.31
0.473
79.33
3.03
2.19

SM
81.0
76.0
73.0
4.04
0.945
76.67
2.11
1.27

SS
78.0
70.0
70.0
4.62
0.945
72.67
0.72
-0.12

ST
69.0
75.0
71.0
3.06
0.709
71.67
0.38
-0.46

SZ
77.0
78.0
72.0
3.21
0.709
75.67
1.76
0.92

T
72.0
71.0
73.0
1.00
0.236
72.00
0.49
-0.35

TD
162.0
180.0
186.0
12.49
4.496
176.00
36.52
35.68
X
TH








•
n








• '
TL
72.0
73.0
75.0
1.53
0.354
73.33
0.96
0.12

TQ
60.0
64.0
65.0
2.65
0.591
63.00
-2.62
-3.46

U
64.0
66.0
68.0
2.00
0.473
66.00
-1.59
-2.42

UE
76.0
73.0
75.0
1.53
0.354
74.67
1.42
0.58

UN








• ¦
UP
53.0
56.0
63.0
5.13
1.345
57.33
-4.59
-5.43
U
uw
53.0
51.0
58.0
3.61
0.827
54.00
-5.74
-6.58
U
VA
44.0
49.0
50.0
3.21
0.709
47.67
-7.94
-8.78
U
VC








' •
• 3
0 -
No data submitted
Insufficient data
x =
TAG SYMBOLS
Determined to be an outlier
IT a Above control limit
JJ = Below control limit
^	JJ

-------
6/12	CRD-LV Performance Evaluation: Strontium in Water, 23-Jan-1996
Strontium-8 9
Lab
Res. 1
Exper. Rng anal	Normalized deviation
^es- ^	Res. 3 Sigma (R + SR) Average (grand-avg) (known) Tag
VH
VI
43.0
58.0
52.0
7.55
2.470
51.00
-6.78
-7.62

w
72.0
71.0
67.0
2.65
0.591
70.00
-0.20
-1.04

WF
83.0
70.0
74.0
6.66
2.020
75.67
1.76
0.92

WG
84.0
82.0
81.0
1.53
0.354
82.33
4.07
3.23
11
WI
116.0
113.0
122.0
4.58
1.120
117.00
16.08
15.24
X
WO








~
X
62.0
55.0
55.0
4.04
0.827
57.33
-4.59
-5.43

Data sorted by Laboratory Average
Average
Tag
Lab
Average
Tag
Lab
Average
Tag
Lab
4.00
X
AU
67.33

CX
74.67

UE
15.33
X
PV
68.00

RF
74.67

AZ
24.67
X
M
68.00

JY
75.33

LF
47.67
11
VA
68.67

I
75.67

WF
48.33
w.
GQ
68.67

AJ
75.67

SZ
51.00
u
VI
69.00

CS
76.00

E
54.00
4
UW
69.67

DD
76.00

BA
54.33
Jl
K
70.00

W
76.33

J
55.33
u
CO
70.00

sc
76.33

CK
57.33
n
X
70.33

DE
76.67

SM
57.33
u
UP
70.67

BO
76.67

S
57.33
11
BC
71.67

ST
77.00

AW
59.00

R
72.00

T
79.00

C
59.33
u
SF
72.00

KH
79.33

SI
60.00

JE
72.33

AF
79.33

KL
61.33
11
DT
72.67

ss
79.33

EL
62.33
11
EB
73.33

TL
79.67

Q
63.00
u
TQ
73.33

NO
80.00

PB
63.00
li
QW
73.33

L
81.33

CG
63.00

QU
73.33

AE
82.33
IT
WG
63.33
li
JS
73.67

CJ
83.00
IT
SD
65.33

HK
73.67

AK
83.33
IT
NT
65.33

DO
74.00

RR
83.33
ir
DZ
66.00

U
74.00

NJ
86.00
IT
BH
66.33

OA
74.00

BM
89.00
IT
LT
66.67

N
74.00

A
92.67
IT
HP
67.00

QZ
74.33

BL
117.00
176.00
X
X
WI
TD
• = No data submitted	TAG SYMBOLS	IT = Above control limit
0 = Insufficient data	x = Determined to be an outlier	U = Below control limit I
^	-y

-------
CRD-LV Performance Evaluation: Strontium in Water, 23-Jan-1996	7/12
Strontium*89
% responding labs		Frequency distribution	
10-3
I 	T -1 . ¦¦-f—f- ¦¦
-i	1	1	1	1	1	1	1	l— l ~ i	i
-4	-2	0	+2	+4	+6
Normalized deviation of the mean from the known value
responding labs	Frequency distribution
¦¦ ¦. ¦
¦i		!¦	m+A.
-6	-4	-2	0+2+4	+6
Normalized deviation of the mean from the grand average

-------
CRD-LV Performance Evaluation: Strontium in Water, 23-Jan-1996
8/12
Strontium-90
Statistical Summary
98 Participants
The known value of this nuclide is 5.0 pCi/1 with an expected precision of 5.0; the control limits
are 0.0 to 13.7; the warning regions are 0.0 to 0.0 and 10.8 to 13.7
14(14.3 %) Failed to respond
. 81 (82.7 %) Within all limits
* \l X.
* \ 1\
• \ K
0 \l >v
* \ TV.
0 nJN,.

2(2.0 %) In warning zone
1(1.0 %) Outliers •'
t
I I
but within control
Statistic
Respondents
Non-outliers
Mesin
6.11
Grand Avg 5.20
Std. Dev.
8.48
1.73
Variance
71.97
3.00
% Coef. of Var.
138.91
33.32
% deviation of mean from known value
22.14
4.02
Norm. dev. of mean from known value
0.13
0.12
Median
4.67
4.67
% deviation of median from known value
-6.67
-6.67
Norm. dev. of median from known value
-0.04
-0.19
1(1.2 %) More than 3 norm. S.D.
2(2.4 %) Between 2 and
, 78(92.9 %) Within 1 norm. S.D.
of Known value
3(3.6 %) Between 1 and 2 norm. S.D.

-------
9/12	CRD-LV Performance Evaluation: Strontium in Water, 23-Jan-1996
Strontiuxn-90
Lab Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known) Tag
A
4.0
6.0
4.0
1.15
0.236
4.67
-0.19
-0.12

AE
4.0
5.0
4.0
0.58
0.118
4.33
-0.30
-0.23

AF
5.0
4.0
5.0
0.58
0.118
4.67
-0.19
-0.12

AJ
5.0
9.0
8.0
2.08
0.473
7.33
0.74
0.81

AK
4.0
4.0
4.0
0.00
0.000
4.00
-0.42
-0.35

AL








•
AU
76.0
87.0
81.0
5.51
1.570
81.33
26.37
26.44
X
AW
6.0
5.0
5.0
0.58
0.118
5.33
0.05
0.12

AY








•
AZ
4.0
4.0
5.0
0.58
0.118
4.33
-0.30
-0.23

BA
4.0
5.0
4.0
0.58
0.118
4.33
-0.30
-0.23

BB
4.0
5.0
4.0
0.58
0.118
4.33
-0.30
-0.23

BC
4.0
3.0
3.0
0.58
0.118
3.33
-0.65
-0.58

BG
4.0
4.0
3.0
0.58
0.118
3.67
-0.53
-0.46

BH
6.0
5.0
5.0
0.58
0.118
5.33
0.05
0.12

BL
4.0
5.0
5.0
0.58
0.118
4.67
-0.19
-0.12

BM
5.0
5.0
5.0
0.00
0.000
5.00
-0.07
0.00

BO
4.0
4.0
5.0
0.58
0.118
4.33
-0.30
-0.23

C
4.0
5.0
5.0
0.58
0.118
4.67
-0.19
-0.12

CA








•
CE
5.0
5.0
4.0
0.58
0.118
4.67
-0.19
-0.12

CG
6.0
4.0
5.0
1.00
0.236
5.00
-0.07
0.00

CJ
5.0
5.0
5.0
0.00
0.000
5.00
-0.07
0.00

CK
5.0
5.0
5.0
0.00
0.000
5.00
-0.07
0.00

CO
5.0
7.0
7.0
1.15
0.236
6.33
0.39
0.46

CS
4.0
5.0
5.0
0.58
0.118
4.67
-0.19
-0.12

CX
n
4.0
9.0
8.0
2.65
0.591
7.00
0.62
0.69

U
DD
5.0
5.0
4.0
0.58
0.118
4.67
-0.19
-0.12
•
DE
5.0
5.0
5.0
0.00
0.000
5.00
-0.07
0.00

DO
3.0
5.0
3.0
1.15
0.236
3.67
-0.53
-0.46

DT
6.0
4.0
5.0
1.00
0.236
5.00
-0.07
0.00

DZ
6.0
5.0
7.0
1.00
0.236
6.00
0.28
0.35

E
5.0
5.0
5.0
0.00
0.000
5.00
-0.07
0.00

EB
5.0
2.0
4.0
1.53
0.354
3.67
-0.53
-0.46

EL
5.0
5.0
4.0
0.58
0.118
4.67
-0.19
-0.12

FZ








•
GQ
6.0
6.0
6.0
0.00
0.000
6.00
0.28
0.35

HK
4.0
4.0
4.0
0.00
0.000
4.00
-0.42
-0.35

HP
3.0
3.0
2.0
0.58
0.118
2.67
-0.88
-0.81

I
4.0
4.0
4.0
0.00
0.000
4.00
-0.42
-0.35

J
6.0
6.0
5.0
0.58
0.118
5.67
0.16
0.23

JE
7.0
8.0
7.0
0.58
0.118
7.33
0.74
0.81

JG








•
JS
5.0
4.0
5.0
0.58
0.118
4.67
-0.19
-0.12

in
• Q
No data submitted
Insufficient data
x =
TAG SYMBOLS
Determined to be an outlier
ft s Above control limit
li s Below control limit j

-------
CRD-LV Performance Evaluation: Strontium in Water, 23-Jan-1996 10/12
Stronti um-90
Lab Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known) Tag
JY







•
K
5.0
4.0
4.0
0.58
0.118
4.33
-0.30
-0.23
KH
4.0
4.0
5.0
0.58
0.118
4.33
-0.30
-0.23
KL
6.0
6.0
6.0
0.00
0.000
6.00
0.28
0.35
L
4.0
4.0
4.0
0.00
0.000
4.00
-0.42
-0.35
LF
8.0
8.0
9.0
0.58
0.118
8.33
1.09
1.15
LT
2.0
3.0
2.0
0.58
0.118
2.33
-0.99
-0.92
M
13.0
13.0
12.0
0.58
0.118
12.67
2.59
2.66
N
5.0
7.0
6.0
1.00
0.236
6.00
0.28
0.35
NJ
4.0
4.0
4.0
0.00
0.000
4.00
-0.42
-0.35
NO
6.0
7.0
6.0
0.58
0.118
6.33
0.39
0.46
NT
5.0
5.0
5.0
0.00
0.000
5.00
-0.07
0.00
OA
4.0
4.0
4.0
0.00
0.000
4.00
-0.42
-0.35
PB
5.0
5.0
5.0
0.00
0.000
5.00
-0.07
0.00
PV
5.0
6.0
5.0
0.58
0.118
5.33
0.05
0.12
Q
7.0
8.0
8.0
0.58
0.118
7.67
0.85
0.92
QJ
4.0
5.0
5.0
0.58
0.118
4.67
-0.19
-0.12
QU
7.0
5.0
8.0
1.53
0.354
6.67
0.51
0.58
QW
7.0
7.0
6.0
0.58
0.118
6.67
0.51
0.58
QZ
4.0
4.0
4.0
0.00
0.000
4.00
-0.42
-0.35
E
4.0
5.0
4.0
0.58
0.118
4.33
-0.30
-0.23
RF
5.0
5.0
5.0
0.00
0.000
5.00
-0.07
0.00
RR
5.0
4.0
5.0
0.58
0.118
4.67
-0.19
-0.12
S
4.0
4.0
4.0
0.00
0.000
4.00
-0.42
-0.35
sc
4.0
5.0
4.0
0.58
0.118
4.33
-0.30
-0.23
SD
4.0
4.0
6.0
1.15
0.236
4.67
-0.19
-0.12
SF
7.0
8.0
6.0
1.00
0.236
7.00
0.62
0.69
SI
5.0
5.0
5.0
0.00
0.000
5.00
-0.07
0.00
SM
6.0
5.0
4.0
1.00
0.236
5.00
-0.07
0.00
ss
5.0
6.0
5.0
0.58
0.118
5.33
0.05
0.12
ST
4.0
5.0
5.0
0.58
0.118
4.67
-0.19
-0.12
sz
5.0
4.0
5.0
0.58
0.118
4.67
-0.19
-0.12
T
5.0
4.0
4.0
0.58
0.118
4.33
-0.30
-0.23
TD
15.0
8.0
4.0
5.57
1.570
9.00
1.32
1.39
TH







•
TI







1 .
TL
5.0
4.0
4.0
0.58
0.118
4.33
-0.30
-0.23
TQ
6.0
6.0
7.0
0.58
0.118
6.33
0.39
0.46
U
4.0
3.0
5.0
1.00
0.236
4.00
-0.42
-0.35
UE
5.0
5.0
5.0
0.00
0.000
5.00
-0.07
0.00
UN







•
UP
4.0
2.0
3.0
1.00
0.236
3.00
-0.76
-0.69
uw
5.0
4.0
4.0
0.58
0.118
4.33
-0.30
-0.23
VA
7.0
5.0
7.0
1.15
0.236
6.33
0.39
0.46
VC








• =
I 0 3
No data submitted
Insufficient data
x =
TAG SYMBOLS
Determined to be an outlier
IT = Above control limit
= Below control limit
^	JJ

-------
ft			
11 / 12
CRD-LV Performance Evaluation: Strontium in Water, 23-Jan-1996
Stronti um-90








Res. 1 Res. 2


Exper.
Rng anal


Normalized deviation
Lab
Res. 3
Sigma
(R + SR)
Average
(grand-avg) (known) Tag
VH







•
VI
CO
o
00
o

3.0
2.89
0.591
4.67
-0.19 -0.12
W
4.0 3.0

5.0
1.00
0.236
4.00
-0.42 -0.35
WF
9.0 9.0

6.0
1.73
0.354
8.00
0.97 1.04
WG
5.0 5.0

5.0
0.00
0.000
5.00
-0.07 0.00
WI







ft
WO







•
X
14.0 14.0
12.0
1.15
0.236
13.33
2.82 2.89


Data sorted by Laboratory Averaj
fe

Average
Tag
Lab
Average
Tag
Lab
Average Tag Lab
2.33

LT

4.33

AE

5.00 CG
2.67

HP

4.67

VI

5.00 BM
3.00

UP

4.67

SZ

5.33 SS
3.33

BC

4.67

ST

5.33 PV
3.67

EB

4.67

SD

5.33 BH
3.67

DO

4.67

RR

5.33 AW
3.67

BG

4.67

QJ

5.67 J
4.00

W

4.67

JS

6.00 N
4.00

U

4.67

EL

6.00 KL
4.00

S

4.67

DD

6.00 . GQ
4.00

QZ

4.67

CS

6.00 DZ
4.00

OA

4.67

CE

6.33 VA
4.00

NJ

4.67

C

6.33 TQ
4.00

L

4.67

BL

6.33 NO
4.00

I

4.67

AF

6.33 CO
4.00

HK

4.67

A

6.67 QW
4.00

AK

5.00

WG

6.67 QU
4.33

UW

5.00

UE

7.00 SF
4.33

TL

5.00

SM

7.00 CX
4.33

T

5.00

SI

7.33 JE
4.33

SC

5.00

RF

7.33 AJ
4.33

R

5.00

PB

7.67 Q
4.33

KH

5.00

NT

8.00 WF
4.33

K

5.00

E

8.33 LF
4.33

BO

5.00

DT

9.00 TD
4.33

BB

5.00

DE

12.67 M
4.33

BA

5.00

CK

13.33 X
4.33

AZ

5.00

CJ
81.33 x AU
• = No data submitted


TAG SYMBOLS


1T = Above control limit
0 = Insufficient data
V-	

X s
Determined to be an outlier

JJ> = Below control limit J

-------
CRD-LV Performance Evaluation: Strontium in Water, 23-Jan-1996 12/12
Strontium-90
% responding labs	Frequency distribution







¦.		

1 	
	 1
1-1	
¦—r							1	

Normalized deviation of the mean from the known value
% responding labs	Frequency distribution		
M: I::::::::::::::::
o--,—,—,—,—,— tb|ImIiiii ¦—,—	
-6	-4	-2	0	+2
Normalized deviation of the mean from the grand average

-------
United States	Office of Research and	EPA/600/R-96/034
Environmental Protection	Development	March 1996
Agency	Washington, DC 20460
Gross Alpha-Beta in
Water Performance
Evaluation Study
A Statistical Evaluation of
the January 26, 1996 Data
023RSL96 cov-034

-------
Gross Alpha-Beta in Water
Performance Evaluation Study
January 26, 1996
Environmental Protection Agency
National Exposure Research Laboratory
Characterization Research Division
Las Vegas, Nevada

-------
UNITED STATES ENVIRONMENTAL PROTECTION AGENCY
OFFICE OF RESEARCH AND DEVELOPMENT
NATIONAL EXPOSURE RESEARCH LABORATORY
CHARACTERIZATION RESEARCH DIVISION-LAS VEGAS
P.O. BOX 93478
LAS VEGAS, NEVADA 89193-3478
(702/798-2100)
Dear Participant,
Enclosed are the results of the Analytical Sciences Branch (CRD-LV)
Performance Evaluation Study for Gross Alpha-Beta in Water; January 26, 1996.
The known value for each analysis was determined by gravimetric methods,
checked by chemical analyses performed by CRD-LV's Radiochemistry Laboratory,
and compared to the participating laboratories' grand average.
The expected precision, determined by the known value, was taken from
'Table 3. Laboratory Precision: One Standard Deviation Values and Control Limits
for Various Analyses", which is based on data accumulated over the years by the
Performance Evaluation Program, and can be found in the Environmental Radioactivity
Performance Evaluation Studies Program and Radioactive Standards Distribution
Program information brochure.
Please take a few minutes to review this report and the analytical data your
laboratory submitted to us. If there are any apparent discrepancies, please notify us
immediately.
We encourage you to make use of the computer-automated data-entry system
that has been in place for some time now. As the number of participants increases,
and it becomes unrealistic for us to receive results by mail or FAX, the computer
system will be our only avenue for accepting data.
If you have any questions or comments, please send a message via the data-entry
system or contact George Dilbeck at 702/798-2104 or Patricia Honsa at 702/798-2141.
Sincerely,
George Dilbeck
Team Leader
RADQA Program
Enclosure

-------
NOTICE
This material has been funded wholly by
the U.S. Environmental Protection Agency.
It has been subjected to the Agency's review,
and has been approved for publication as
an EPA document.

-------
'		ft
CRD-LV Performance Evaluation: Gross Alpha-Beta in Water, 26-Jan-1996 1/16
I		J
The following pages consist of separate sections for each of the nuclides in this study with four
parts per section. After the first, each part is separated from the next by a new page or a thick
horizontal bar. The first page of each section is a statistical summary for the nuclide and starts
with a statement of the known value, the control limits, and the warning limits.
The warning limits are placed at two normalized standard deviations above and below the
known value anu the control limits are three normalized standard deviations above and below
the known value. If you keep control charts, these values will be useful for anticipating problems
with the accuracy of your analytical methods.
The coin shaped pie chart at the top of the summary page shows the fate of all the samples
sent out in number and percentage terms. The pie chart starts at the top and rotates clockwise.
The first sector represents those participants who submitted analytical results within both the
warning and control limits. The next sector represents those who are in the warning region but
not out of control. The third sector represents those who are out of control, but have passed
the outlier test. The fourth sector represents those who have failed the outlier test. The last
sector represents those participants who have failed to respond properly. This is the case if no
analytical results were returned, or less than three determinations were reported, or if the results
were received too late. The reeding on the edge of the coin is spaced at one percent intervals, and
the sector shading becomes darker as the data reliability decreases. Sectors with zero width are
not shown.
The table in the center shows a number of statistical quantities calculated from the submitted
data based on the mean and median values in relation to the known value, both before and after
outlier removal. The lower pie chart uses the same construction as the upper chart and shows
the distribution of properly submitted data in terms of deviation from the known value divided
into sectors representing one, two, three, and greater than three normalized standard deviations.
The second part is an alphabetical listing, in lab-code order, of submitted data and several
calculated quantities. An entry that is shaded has been rejected because of one of the reasons
listed above or failure of the outlier test. The fifth and sixth columns are a measure of laboratory
precision. The Range analysis is a normalized value that you may use to keep precision control
charts. If this value is between 2.0 and 3.0, your analytical process precision is in the warning
zone; if it exceeds 3.0 it is out of control. The eighth and ninth columns are the differences from
the mean of all non-outliers and from the known value, respectively. A tag symbol may appear in
the last column. Each page with tags has a symbol definition summary at the bottom. If there is
no tag symbol, the data is within the control limits, but it may be in the warning zone.
The third part is a three-column listing of result average, tag symbol, and lab-code in average
order excluding those labs not responding properly. In this order, all outliers and out-of-control
results appear at the top or bottom of the list.
The last part is two bar chart displays showing frequency distributions of responding
participants. The first chart places the known value at the center and a bar at each 0.2 unit of
expected precision. The second chart places the mean of the reported measurements at the center
and a bar at each 0.2 unit of standard deviation. In both cases, a bar includes those results within
0.1 unit up to the maximum of six. Any results more than six units from the center value are
shown cumulatively by a shaded bar one past the sixth unit. If the central tendency of the known
value distribution falls away from the center, an error in accuracy is indicated. If the distribution
is broad, poor precision is indicated. The mean value distribution is similar but uses the average
and standard deviation of reported results as its basis.

-------
2 / 16 CRD-LV Performance Evaluation: Gross Alpha-Beta in Water, 26-Jan-1096
The Range Analysis(R + SR) is calculated from the range, mean range and standard error of
the range values. The range is the difference between the maximum and minimum results for the
laboratory. The mean range is calculated by multiplying the expected precision by 1.693(for three
results). The standard error of the range is calculated by multiplying the mean range by 2.575(for
three results), subtracting the mean range from this product, and dividing the result by 3. If the
range is greater than the mean range, then the range analysis is calculated by subtracting the
mean range from the range, dividing the result by the standard error of the range and adding 1.
If the mean range is greater than or equal to the range, then the range analysis is calculated by
dividing the range by the mean range.
The normalized deviation of the mean from the grand average is calculated from the deviation
of the mean from the grand average and the standard error of the mean values. The deviation of
the mean from the grand average is calculated by subtracting the grand average from the
average of the laboratory's three results. The standard error of the mean is calculated by
dividing the expected precision by the square root of 3(the number of results). The normalized
deviation of the mean from the grand average is calculated by dividing the deviation of the mean
from the grand average by the standard error of the mean.
The normalized deviation of the mean from the known value is calculated from the deviation of
the mean from the known value and the standard error of the mean values. The deviation of the
mean from the known value is calculated by subtracting the known value from the average of the
laboratory's three results. The standard error of the mean is calculated by dividing the expected
precision by the square root of 3(the number of results). The normalized deviation of the mean
from the known value is calculated by dividing the deviation of the mean from the known value by
the standard error of the mean.
A complete explanation of the statistical calculations involved in the report may be found in
the Environmental Radioactivity Performance Evaluation Studies Program information brochure
[Draft Revision of EPA-600/4-81-004], available from Patricia Honsa, CRD-LV, 702/798-2141.

-------
—
CRD-LV Performance Evaluation: Gross Alpha-Beta in Water, 26-Jan-1996 3/16
Gross Alpha	Statistical Summary	172 Participants
The known value of this nuclide is 12.1 pCi/1 with an expected precision of 5.0; the control limits
are 3.4 to 20.8; the warning regions are 3.4 to 6.3 and 17.9 to 20.8
11 (6.4 %) Failed to respond --
5(2.9 %) Outliers •
Statistic
; 1 50(87.2 %) Within all limits
Respondents
6(3.5 %) In warning zone
but within control
Non-outliers
Mean
Std. Dev.
Variance
% Coef. of Var.
% deviation of mean from known value
Norm. dev. of mean from known value
Median
% deviation of median from known value
Norm. dev. of median from known value
12.58
5.08
25.79
40.36
3.99
0.09
11.63
-3.86
-0.09
Grand Avg 11.90
2.52
6.36
21.20
-1.65
-0.08
11.58
-4.27
-0.20
5(3.1 %) More than 3 norm. S.D.
,122(75.8 %) Within 1 norm. S.D.
of known value

6(3.7 °/o) Between 2 and 3 norm. S.D. •
28(17.4 %) Between 1 and 2 norm. S.D.

-------
(f	'
4/16 CRD-LV Performance Evaluation: Gross Alpha-Beta in Water, 26-Jan-1996
Gross Alpha







Lab
Res. 1
Res. 2

Exper.
Rng anal

Normalized deviation
Res. 3
Sigma
(R + SR)
Average
(grand-avg)
(known) Tag
A
8.9
10.3
9.2
0.74
0.165
9.47
-0.84
-0.91
AE
11.9
13.4
10.2
1.60
0.378
11.83
-0.02
-0.09
AF
11.3
11.2
10.7
0.32
0.071
11.07
-0.29
-0.36
AH
9.9
8.4
11.0
1.31
0.307
9.77
-0.74
-0.81
AJ
10.3
9.4
11.3
0.95
0.224
10.33
-0.54
-0.61
AK
10.8
11.0
10.7
0.15
0.035
10.83
-0.37
-0.44
AL
18.9
17.9
19.2
0.68
0.154
18.67
2.34
2.27
AP
11.0
11.0
11.5
0.29
0.059
11.17
-0.25
-0.32
AR
11.5
11.1
10.1
0.72
0.165
10.90
-0.35
-0.42
AU
14.2
11.5
15.0
1.83
0.413
13.57
0.58
0.51
AW
12.4
12.7
13.8
0.74
0.165
12.97
0.37
0.30
AZ







•
BA
10.3
10.4
10.5
0.10
0.024
10.40
-0.52
-0.59
BB
10.4
8.9
11.6
1.35
0.319
10.30
-0.55
-0.62
BC
12.3
12.0
11.7
0.30
0.071
12.00
0.03
-0.03
BG
11.0
11.0
11.0
0.00
0.000
11.00
-0.31
-0.38
BH
11.6
12.5
12.7
0.59
0.130
12.27
0.13
0.06
BK
13.6
14.9
14.2
0.65
0.154
14.23
0.81
0.74
BL
17.3
15.8
17.6
0.96
0.213
16.90
1.73
1.66
BM
12.2
12.8
13.8
0.81
0.189
12.93
0.36
0.29
BN
6.9
6.9
7.7
0.46
0.095
7.17
-1.64
-1.71
BO
11.4
9.9
11.4
0.87
0.177
10.90
-0.35
-0.42
BS
11.8
14.2
12.7
1.21
0.284
12.90
0.35
0.28
C
7.0
7.3
7.7
0.35
0.083
7.33
-1.58
-1.65
CA
17.7
20.3
20.4
1.53
0.319
19.47
2.62
2.55
CE
9.8
8.3
8.9
0.75
0.177
9.00
-1.00
-1.07
CG
11.9
11.6
11.2
0.35
0.083
11.57
-0.12
-0.18
CJ
20.0
18.0
19.0
1.00
0.236
19.00
2.46
2.39
CK
10.5
10.3
12.1
0.99
0.213
10.97
-0.32
-0.39
CO
11.5
10.1
8.1
1.71
0.402
9.90
-0.69
-0.76
cs
10.3
11.1
12.6
1.17
0.272
11.33
-0.20
-0.27
cx
11.9
14.5
11.7
1.56
0.331
12.70
0.28
0.21
D
12.6
13.7
13.5
0.59
0.130
13.27
0.47
0.40
DB
12.7
11.6
11.0
0.86
0.201
11.77
-0.05
-0.12
DE
9.9
9.9
10.0
0.06
0.012
9.93
-0.68
-0.75
DH
12.3
9.6
10.6
1.37
0.319
10.83
-0.37
-0.44
DI
12.5
10.3
12.2
1.19
0.260
11.67
-0.08
-0.15
DO
10.8
12.9
13.5
1.42
0.319
12.40
0.17
0.10
DS
12.5
12.0
10.3
1.15
0.260
11.60
-0.10
-0.17
DT
10.5
10.7
10.5
0.12
0.024
10.57
-0.46
-0.53
DZ
12.9
11.2
14.8
1.80
0.425
12.97
0.37
0.30
E
11.2
10.3
10.5
0.47
0.106
10.67
-0.43
-0.50
EB
10.6
10.8
13.1
1.39
0.295
11.50
-0.14
-0.21
EO
10.0
12.0
12.0
1.15
0.236
11.33
-0.20
-0.27
ER
13.5
13.3
13.1
0.20
0.047
13.30
0.48
0.42
• =
No data submitted

TAG SYMBOLS

It = Above control limit
[a.
Insufficient data
x =
Determined to be an outlier
U = Below control limit
	1—		

-------
A	—					
——		X
CRD-LV Performance Evaluation: Gross Alpha-Beta in Water, 26-Jan-1996 5/16
Gross Alpha
Lab Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known)
Tag
EV
11.1
8.5
12.0
1.82
0.413
10.53
-0.47
-0.54

EW








• -
FF
7.5
8.6
8.4
0.59
0.130
8.17
-1.29
-1.36

FJ








•
FN
10.0
10.0
11.0
0.58
0.118
10.33
-0.54
-0.61

FZ
7.6
8.6
10.2
1.31
0.307
8.80
-1.07
-1.14

GQ
6.1
5.0
6.0
0.61
0.130
5.70
-2.15
-2.22

GT
17.5
14.9
16.6
1.32
0.307
16.33
1.54
1.47

GZ
16.5
17.7
16.8
0.62
0.142
17.00
1.77
1.70

HI
9.2
10.0
8.7
0.66
0.154
9.30
-0.90
-0.97

HK
15.2
15.1
15.4
0.15
0.035
15.23
1.15
1.09

HL
11.1
11.1
11.1
0.00
0.000
11.10
-0.28
-0.35

HP
10.0
7.0
9.3
1.57
0.354
8.77
-1.09
-1.15

I
10.7
9.4
8.6
1.06
0.248
9.57
-0.81
-0.88

ID
8.4
9.1
8.8
0.35
0.083
8.77
-1.09
-1.15

J
11.3
11.3
11.7
0.23
0.047
11.43
-0.16
-0.23

JG
12.3
12.2
12.5
0.15
0.035
12.33
0.15
0.08

JM
11.7
12.8
11.3
0.78
0.177
11.93
0.01
-0.06

JN
12.8
13.4
14.6
0.92
0.213
13.60
0.59
0.52

JP
12.8
12.6
14.3
0.93
0.201
13.23
0.46
0.39

JQ
12.9
13.2
13.2
0.17
0.035
13.10
0.42
0.35

JS
9.7
10.9
7.9
1.51
0.354
9.50
-0.83
-0.90

JY
11.6
10.8
10.4
0.61
0.142
10.93
-0.33
-0.40

K
12.9
14.0
12.5
0.78
0.177
13.13
0.43
0.36

KE
20,7
26.0
18.7
3.77
0.862
21.80
3.43
3.36
X
KH
9.8
10.3
10.6
0.40
0.095
10.23
-0.58
-0.65

KT
8.0
8.0
10.0
1.15
0.236
8.67
-1.12
-1.19

KX
12.0
15.0
12.0
1.73
0.354
13.00
0.38
0.31

L
15.4
13.7
13.4
1.08
0.236
14.17
0.79
0.72

LF
15.0
14.0
13.0
1.00
0.236
14.00
0.73
0.66

LR
9.7
10.9
10.4
0.60
0.142
10.33
-0.54
-0.61

LT
11.3
11.4
12.3
0.55
0.118
11.67
-0.08
-0.15

M
15.0
14.0
13.0
1.00
0.236
14.00
0.73
0.66

MF
13.5
13.2
13.8
0.30
0.071
13.50
0.55
0.48

MV
9.2
13.4
13.5
2.45
0.508
12.03
0.05
-0.02

MX
53.1
55;0
60.8
4.01
0.910
56.30
15.38
15.31
X
N
12.2
13.3
12.8
0.55
0.130
12.77
0.30
0.23

NA
36.0
36.0
34.0
1.15
0.236
36.33
8?12
8;05
X
NB
17.4
22.0
26*2
3.92
0.921
21.53
3.34
3.27
Xx ¦
NJ
11.0
11.8
12.1
0.57
0.130
11.63
-0.09
-0.16

NK
10.3
8.1
9.5
1.11
0.260
9.30
-0.90
-0.97

NO
11.1
11.5
12.3
0.61
0.142
11.63
-0.09
-0.16

NP
11.8
10.9
10.9
0.52
0.106
11.20
-0.24
-0.31

NT
16.6
17.4
16.7
0.44
0.095
16.90
1.73
1.66

0
10.2
10.6
10.7
0.26
0.059
10.50
-0.49
-0.55

• 5 No data submitted
0 s Insufficient data
x =
TAG SYMBOLS
Determined to be an outlier
It s Above control limit
U = Below control limit
V-	SJ

-------
6/16 CRD-LV Performance Evaluation: Gross Alpha-Beta in Water, 26-Jan-1996
Gross Alpha
Lab Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known) Tag
OA
12.3
11.3
10.2
1.05
0.248
11.27
-0.22
-0.29
OB
13.3
12.7
7.6
3.13
0.673
11.20
-0.24
-0.31
OF
10.2
12.5
13.8
1.82
0.425
12.17
0.09
0.02
OS
14.0
11.0
11.0
1.73
0.354
12.00
0.03
-0.03
OX
13.0
14.5
12.2
1.17
0.272
13.23
0.46
0.39
OY
32.4
34.2
36.4
2.00
0.473
34.33
7.77
7.70 x
P
14.7
14.4
16.7
1.25
0.272
15.27
1.17
1.10
PB
12.2
11.8
12.9
0.56
0.130
12.30
0.14
0.07
PG
14.5
13.9
14.3
0.31
0.071
14.23
0.81
0.74
PM
13.4
13.4
13.4
0.00
0.000
13.40
0.52
0.45
PQ
9.8
9.5
8.5
0.68
0.154
9.27
-0.91
-0.98
PR
9.7
9.7
9.4
0.17
0.035
9.60
-0.80
-0.87
PV
20.0
14.0
13.4
3.65
0.780
15.80
1.35
1.28
Q
14.4
10.4
13.1
2.04
0.473
12.63
0.25
0.18
QC
18.4
17.2
17.3
0.67
0.142
17.63
1.99
1.92
QP
20.0
20.9
18.8
1.05
0.248
19.90
2.77
2.70
QQ
13.3
10.9
12.6
1.23
0.284
12.27
0.13
0.06
QT
11.3
10.6
9.9
0.70
0.165
10.60
-0.45
-0.52
QU
9.0
8.0
9.0
0.58
0.118
8.67
-1.12
-1.19
QW
9.4
13.7
13.7
2.48
0.508
12.27
0.13
0.06
QX
10.2
9.9
9.8
0.21
0.047
9.97
-0.67
-0.74
QZ
8.4
10.3
10.4
1.13
0.236
9.70
-0.76
-0.83
R
11.6
13.0
12.6
0.72
0.165
12.40
0.17
0.10
RB
17.2
17.3
18.4
0.67
0.142
17.63
1.99
1.92
RD
14.7
15.3
14.0
0.65
0.154
14,67
0.96
0.89
RF
9.1
10.3
11.0
0.96
0.224
10.13
-0.61
-0.68
RG
10.2
10.0
10.1
0.10
0.024
10.10
-0.62
-0.69
RI
6.6
11.2
8.9
2.30
0.543
8.90
-1.04
-1.11
RR
11.0
11.0
11.0
0.00
0.000
11.00
-0.31
-0.38
RV







•
RZ







•
S
13.8
12.9
12.7
0.59
0.130
13.13
0.43
0.36
sc
11.7
9.9
11.7
1.04
0.213
11.10
-0.28
-0.35
SD
11.1
11.1
10.9
0.12
0.024
11.03
-0.30
-0.37
SF
12.9
11.2
11.0
1.04
0.224
11.70
-0.07
-0.14
SG
17.0
8.5
12.9
4.25
1.008
12.80
0.31
0.24
SI
12.5
12.9
13.3
0.40
0.095
12.90
0.35
0.28
SL
13.0
11.0
14.0
1.53
0.354
12.67
0.27
0.20
SM
9.7
13.2
10.5
1.83
0.413
11.13
-0.27
-0.33
SN
10.3
11.6
8.9
1.35
0.319
10.27
-0.57
-0.64
SO
10.6
9.5
10.6
0.64
0.130
10.23
-0.58
-0.65
SR
8.4
8.8
8.1
0.35
0.083
8.43
-1.20
-1.27
SS
11.1
11.3
10.9
0.20
0.047
11.10
-0.28
-0.35
ST
10.4
9.5
9.9
0.45
0.106
9.93
-0.68
-0.75
SU
5.5
6.3
6.7
0.61
0.142
6.17
-1.99
-2.06
• ~
0 =
No data submitted
Insufficient data
x =
TAG SYMBOLS
Determined to be an outlier
IT a Above control limit
JJ. = Below control limit

-------
—__	> i
CRD-LV Performance Evaluation: Gross Alpha-Beta in Water, 26-Jan-1996 7/16
Gross Alpha
Lab Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known)
SV








SX
13.0
10.0
11.0
1.53
0.354
11.33
-0.20
-0.27
sz
11.6
11.8
12.9
0.70
0.154
12.10
0.07
0.00
T
10.3
10.4
9.4
0.55
0.118
10.03
-0.65
-0.72
TD
18.0
16.5
18.9
1.21
0.284
17.80
2.04
1.97
TG
8.9
12.0
7.6
2.26
0.520
9.50
-0.83
-0.90
TH








TI








TL
17.9
11.8
10.8
3.84
0.839
13.50
0.55
0.48
TN
12.9
12.1
9.9
1.55
0.354
11.63
-0.09
-0.16
TQ
13.4
12.2
13.2
0.64
0.142
12.93
0.36
0.29
TW
12.7
11.3
9.1
1.81
0.425
11.03
-0.30
-0.37
TY
8.3
8.7
8.9
0.31
0.071
8.63
-1.13
-1.20
U
13.0
12.1
10.8
1.11
0.260
11.97
0.02
-0.05
UA
15.7
19.8
17.8
2.05
0.484
17.77
2.03
1.96
UE
10.9
12.1
11.7
0.61
0.142
11.57
-0.12
-0.18
UN
10.7
10.9
12.0
0.70
0.154
11.20
-0.24
-0.31
UP
13.2
15.1
12.1
1.52
0.354
13.47
0.54
0.47
UQ
13.3
12.0
13.7
0.89
0.201
13.00
0.38
0.31
uw
14.7
16.4
14.5
1.04
0.224
15.20
1.14
1.07
VA
12.2
8.7
10.6
1.75
0.413
10.50
-0.49
-0.55
VC








VH
7.8
9.4
8.8
0.81
0.189
8.67
-1.12
-1.19
VI
12.3
13.5
12.0
0.79
0.177
12.60
0.24
0.17
VJ
15.1
14.5
15.4
0.46
0.106
15.00
1.07
1.00
VO
8.3
9.7
6.3
1.71
0.402
8.10
-1.32
-1.39
VT
12.2
12.4
12.3
0.10
0.024
12.30
0.14
0.07
W
12.8
15.1
13.1
1.25
0.272
13.67
0.61
0.54
WE
9.5
9.0
8.5
0.50
0.118
9.00
-1.00
©
i—i
i
WF
15.2
14.7
13.1
1.10
0.248
14.33
0.84
0.77
WH
10.2
12.1
12.0
1.07
0.224
11.43
-0.16
-0.23
WJ








WN
14.8
14.9
14.9
0.06
0.012
14.87
1.03
0.96
WO
11.9
14.9
10.7
2.16
0.496
12.50
0.21
0.14
WP








WQ
10.8
10.5
11.3
0.40
0.095
10.87
-0.36
-0.43
X
8.6
11.2
10.7
1.38
0.307
10.17
-0.60
-0.67

Data sorted by Laboratory Average
Average
Tag
Lab
Average Tag
Lab
Average
Tag Lab
5.70

GQ
8.17
FF
8.67
KT
6.17

SU
8.43
SR
8.77
ID
7.17

BN
8.63
TY
8.77
HP
7.33

C
8.67
VH
8.80
FZ
8.10

VO
8.67
QU
8.90
RI
• = No data submitted

TAG SYMBOLS


3 Above control limit
0 = Insufficient data

x = Determined to be an outlier

3 Below control limit

-------
8/16 CRD-LV Performance Evaluation: Gross Alpha-Beta in Water, 26-Jan-1996
Gross Alpha
Data sorted by Laboratory Average
Average
Tag
Lab
Average
Tag
Lab
Average
Tag
Lab
9.00

WE
11.03

SD
12.60

VI
9.00

CE
11.07

AF
12.63

Q
9.27

PQ
11.10

SS
12.67

SL
9.30

NK
11.10

SC
12.70

CX
9.30

m
11.10

HL
12.77

N
9.47

A
11.13

SM
12.80

SG
9.50

TG
11.17

AP
12.90

SI
9.50

JS
11.20

UN
12.90

BS
9.57

I
11.20

OB
12.93

TQ
9.60

PR
11.20

NP
12.93

BM
9.70

QZ
11.27

OA
12.97

DZ
9.77

AH
11.33

SX
12.97

AW
9.90

CO
11.33

EO
13.00

UQ
9.93

ST
11.33

CS
13.00

KX
9.93

DE
11.43

WH
13.10

JQ
9.97

QX
11.43

J
13.13

S
10.03

T
11.50

EB
13.13

K
10.10

RG
11.57

UE
13.23

OX
10.13

RF
11.57

CG
13.23

JP
10.17

X
11.60

DS
13.27

D
10.23

SO
11.63

TN
13.30

ER
10.23

KH
11.63

NO
13.40

PM
10.27

SN
11.63

NJ
13.47

UP
10.30

BB
11.67

LT
13.50

TL
10.33

LR
11.67

DI
13.50

MF
10.33

FN
11.70

SF
13.57

AU
10.33

AJ
11.77

DB
13.60

JN
10.40

BA
11.83

AE
13.67

W
10.50

VA
11.93

JM
14.00

M
10.50

O
11.97

U
14.00

LF
10.53

EV
12.00

OS
14.17

L
10.57

DT
12.00

BC
14.23

PG
10.60

QT
12.03

MV
14.23

BK
10.67

E
12.10

SZ
14.33

WF
10.83

DH
12.17

OF
14.67

RD
10.83

AK
12.27

QW
14.87

WN
10.87

WQ
12.27

QQ
15.00

VJ
10.90

BO
12.27

BH
15.20

uw
10.90

AR
12.30

VT
¦15.23

HK
10.93

JY
12.30

PB
15.27

P
10.97

CK
12.33

JG
15.80

PV
11.00

RR
12.40

R
16.33

GT
11.00

BG
12.40

DO
16.90

NT
11.03

TW
12.50

WO
16.90

BL
• = No data submitted TAG SYMBOLS	if = Above control limit
0 = Insufficient data	x = Determined to he an outlier	^ s Below control limit

-------
CRD-LV Performance Evaluation: Gross Alpha-Beta in Water, 26-Jan-1996 9/16
Gross Alpha
Data sorted by Laboratory Average
Average
Tag
Lab
Average
Tag
Lab
Average
Tag
Lab
17.00

GZ
17.80

TD
21.53
X
NB
17.63

RB
18.67

AL
21.80
X
KE
17.63

QC
19.00

CJ
' 34.33
X
OY
17.77

UA
19.47

CA
35.33
X
NA



19.90

QP
56.30
X
MX
% responding labs
Frequency distribution
10-
JJ1

% responding labs
i	i	-
-4	-2	0	+2
Normalized deviation of the mean from the known value
Frequency distribution
+4
+6
-4	-2	0	+2	+4
Normalized deviation of the mean from the grand average
• s No data submitted	TAG SYMBOLS	ft a Above control limit
C5 = Insufficient data	x = Determined to be an outlier	^ — Below control limit
y		9

-------
CRD-LV Performance Evaluation: Gross Alpha-Beta in Water, 26-Jan-1996 10 /16
(			
Gross Beta	Statistical Summary	172 Participants
The known value of this nuclide is 7.0 pCi/1 with an expected precision of 5.0; the control limits
are 0.0 to 15.7; the warning regions are 0.0 to 1.2 and 12.8 to 15.7
Statistic	Respondents	Non-outliers
Mean
9.02
Grand Avg 8.50
Std. Dev.
4.09
1.94
Variance
16.70
3.75
% Coef. of Var.
45.31
22.76
% deviation of mean from known value
28.84
21.49
Norm. dev. of mean from known value
0.49
0.78
Median
8.47
8.47
% deviation of median from known value
20.95
20.95
Norm. dev. of median from known value
0.36
0.76

-------
f		
11/16 CRD-LV Performance Evaluation: Gross Alpha-Beta in Water, 26-Jan-1996
Gross Beta







Lab
Res. 1
Res. 2

Exper.
Rng anal

Normalized deviation
Res. 3
Sigma
(R + SR)
Average
(grand-avg)
(known) Tag
A
19.4
19.2
18.9
0.25
0.059
19.17
3.69
4.21 x
AE
8.1
7.6
7.9
0.25
0.059
7.87
-0.22
0.30
AF
6.7
7.2
5.5
0.87
0.201
6.47
-0.71
-0.18
AH
9.1
9.1
8.0
0.64
0.130
8.73'
0.08
0.60
AJ
4.8
6.4
5.7
0.80
0.189
5.63
-0.99
-0.47
AK
9.3
7.9
8.1
0.76
0.165
8.43
-0.02
0.50
AL
10.6
8.8
10.6
1.04
0.213
10.00
0.52
1.04
AP
9.0
8.3
8.1
0.47
0.106
8.47
-0.01
0.51
AR
7.4
7.6
8.0
0.31
0.071
7.67
-0.29
0.23
AU
4.3
5.3
4.5
0.53
0.118
4.70
-1.32
-0.80
AW
8.8
10.1
9.9
0.70
0.154
9.60
0.38
0.90
AZ







•
BA
11.1
7.1
8.0
2.10
0.473
8.73
0.08
0.60
BB
6.0
7.8
8.2
1.17
0.260
7.33
-0.41
0.12
BC
9.2
9.4
9.2
0.12
0.024
9.27
0.26
0.79
BG
7.0
7.0
7.0
0.00
0.000
7.00
-0.52
0.00
BH
8.2
9.7
9.3
0.78
0.177
9.07
0.19
0.72
BK
7.3
8.3
9.5
1.10
0.260
8.37
-0.05
0.47
BL
7.4
7.7
7.8
0.21
0.047
7.63
-0.30
0.22
BM
9.4
8.3
10.5
1.10
0.260
9.40
0.31
0.83
BN
6.3
6.7
6.4
0.21
0.047
6.47
-0.71
-0.18
BO
6.3
8.3
5.8
1.32
0.295
6.80
-0.59
-0.07
BS
9.9
10.0
10.2
0.15
0.035
10.03
0.53
1.05
C
6.6
6.0
6.0
0.35
0.071
6.20
-0.80
-0.28
CA
7.1
8.3
8.4
0.72
0.154
7.93
-0.20
0.32
CE
7.3
6.8
6.7
0.32
0.071
6.93
-0.54
-0.02
CG
10.5
9.7
10.4
0.44
0.095
10.20
0.59
1.11
CJ
7.3
6.9
7.2
0.21
0.047
7.13
-0.47
0.05
CK
10.0
12.0
10.6
1.03
0.236
10.87
0.82
1.34
CO
5.5
4.1
5.1
0.72
0.165
4.90
-1.25
-0.73
CS
7.5
7.1
7.8
0.35
0.083
7.47
-0.36
0.16
CX
12.8
15.6
11.7
2.01
0.461
13.37
1.68
2.21
D
13.5
13.6
11.2
1.36
0.284
12.77
1.48
2.00
DB
11.3
12.1
11.1
0.53
0.118
11.50
1.04
1.56
DE
7.9
7.9
8.0
0.06
0.012
7.93
-0.20
0.32
DH
10.5
9.9
8.9
0.81
0.189
9.77
0.44
0.96
DI
5.3
5.2
5.9
0.38
0.083
5.47
-1.05
-0.53
DO
9.0
7.7
7.3
0.89
0.201
8.00
-0.17
0.35
DS
8.4
8.9
8.2
0.36
0.083
8.50
0.00
0.52
DT
8.1
7.4
8.3
0.47
0.106
7.93
-0.20
0.32
DZ
8.8
9.4
8.9
0.32
0.071
9.03
0.18
0.70
E
9.6
8.6
8.9
0.51
0.118
9.03
0.18
0.70
EB
9.0
10.1
11.3
1.15
0.272
10.13
0.56
1.09
EO
9.0
11.0
16.0
3.61
0.827
12.00
1.21
1.73
ER







•
• =
No data submitted

TAG SYMBOLS

It = Above control limit
hi
Q
Insufficient data
X s
Determined to be an outlier
= Below control limit

-------
CRD-LV Performance Evaluation: Gross Alpha-Beta in Water, 26-Jan-1996 12/16
Gross Beta
Lab Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known) Tag
EV
7.6
8.3
8.6
0.51
0.118
8.17
-0.12
0.40
EW
10.3
8.5
11.9
1.70
0.402
10.23
0.60
1.12
FF
9.2
8.3
8.3
0.52
0.106
8.60
0.03
0.55
FJ







•
FN
9.0
9.0
8.0
0.58
0.118
8.67
0.06
0.58
FZ
8.4
10.4
7.6
1.44
0.331
8.80
0.10
0.62
GQ
7.8
9.0
9.8
1.01
0.236
8.87
0.13
0.65
GT
7.6
9.7
7.2
1.34
0.295
8.17
-0.12
0.40
GZ
4.0
2.3
3.3
0.85
0.201
3.20
-1.84
-1.32
m
8.1
9.8
8.9
0.85
0.201
8.93
0.15
0.67
HK
10.3
9.5
10.4
0.49
0.106
10.07
0.54
1.06
HL
8.9
8.9
8.9
0.00
0.000
8.90
0.14
0.66
HP
6.4
6.1
8.2
1.14
0.248
6.90
-0.56
-0.03
I
6.7
4.1
6.2
1.38
0.307
5.67
-0.98
-0.46
ID
9.8
8.0
10.0
1.10
0.236
9.27
0.26
0.79
J
7.7
7.3
7.0
0.35
0.083
7.33
-0.41
0.12
JG
9.1
8.3
8.0
0.57
0.130
8.47
-0.01
0.51
JM
7.8
7.5
9.9
1.31
0.284
8.40
-0.04
0.48
JN
8.4
9.0
7.8
0.60
0.142
8.40
-0.04
0.48
JP
6.5
8.4
6.9
1.00
0.224
7.27
-0.43
0.09
JQ
8.2
5.8
4.0
2.11
0.496
6.00
-0.87
-0.35
JS
9.3
10.8
11.3
1.04
0.236
10.47
0.68
1.20
JY
6.0
6.2
7.5
0.81
0.177
6.57
-0.67
-0.15
K
10.3
11.7
10.9
0.70
0.165
10.97
0.85
1.37
KE
8.9
9.9
8.8
0.61
0.130
9.20
0.24
0.76
KH
7.6
9.1
6.3
1.40
0.331
7.67
-0.29
0.23
KT
5.0
4.0
4.0
0.58
0.118
4.33
-1.44
-0.92
KX
10.0
10.0
9.0
0.58
0.118
9.67
0.40
0.92
L
10.4
12.8
11.8
1.21
0.284
11.67
1.10
1.62
LF
7.8
7.8
9.8
1.15
0.236
8.47
-0.01
0.51
LR
10.1
9.2
11.9
1.37
0.319
10.40
0.66
1.18
LT
11.1
10.5
10.9
0.31
0.071
10.83
0.81
1.33
M
8.0
8.0
7.0
0.58
0.118
7.67
-0.29
0.23
MF
7.9
7.8
8.0
0.10
0.024
7.90
-0.21
0.31
MV







'»
MX
47.8
45.0
43:3
2.27
0.532
45.37
12.77
13.29 x
N
7.5
10.4
9.0
1.45
0.343
8.97
0.16
0.68
NA
7.0
12.0
10.0
2.52
0.591
9.67
0.40
0.92
NB
27.5
30.3
33.0
2.75
0.650
30.27
7.54
8.06 x
NJ
13.6
13.2
12.5
0.56
0.130
13.10
1.59
2.11
NK
11.9
8.9
8.0
2.04
0.461
9.60
0.38
0.90
NO
7.6
7.8
8.3
0.36
0.083
7.90
-0.21
0.31
NP
7.7
8.9
7.8
0.67
0.142
8.13
-0.13
0.39
NT
9.1
8.4
8.7
0.35
0.083
8.73
0.08
0.60
O
6.4
6.6
6.9
0.25
0.059
6.63
-0.65
-0.13
• =
0 a
No data submitted
Insufficient data
X s
TAG SYMBOLS
Determined to be an outlier
It s Above control limit
Ji a Below control limit
^	JJ

-------
(1 ft
13/16 CRD-LV Performance Evaluation: Gross Alpha-Beta in Water, 26-Jan-1996
Gross Beta






\
Lab
Res. 1
Res. 2

Exper.
Rng anal

Normalized deviation
Res. 3
Sigma
(R + SR)
Average.
(grand-avg)
(known) Tag
OA
11.1
12.7
15.5
2.23
0.520
13.10
1.59
2.11
OB
6.7
8.2
9.4
1.35
0.319
8.10
-0.14
0.38
OF
4.9
7.1
7.1
1.27
0.260
6.37
-0.74
-0.22
OS
11.0
10.0
12.0
1.00
0.236
11.00
0.86
1.39
OX
10.9
10.5
7.6
1.80
0.390
9.67
0.40
0.92
OY
19.6
21.6
22.0
1.27
0.284
21.03
4.34
4.86 x
P
8.4
7.0
7.8
0.70
0.165
7.73
-0.27
0.25
PB
8.9
8.8
9.3
0.26
0.059
9.00
0.17
0.69
PG
9.4
13.3
8.0
2.75
0.626
10.23
0.60
1.12
PM
11.1
10.9
8.6
1.39
0.295
10.20
0.59
1.11
PQ
8.6
8.7
8.4
0.15
0.035
8.57
0.02
0.54
PR
7.8
7.3
6.3
0.76
0.177
7.13
-0.47
0.05
PV
11.9
12.1
7.6
2.54
0.532
10.53
0.70
1.22
Q
8.6
10.8
9.9
1.11
0.260
9.77
0.44
0.96
QC
8.9
10.4
9.8
0.75
0.177
9.70
0.41
0.94
QP
3.2
4.1
5.8
1.32
0.307
4.37
-1.43
-0.91
QQ
5.6
6.8
7.9
1.15
0.272
6.77
-0.60
-0.08
QT
7.7
12.0
7.3
2.61
0.555
9.00
0.17
0.69
QU
5.9
5.5
6.0
0.26
0.059
5.80
-0.94
-0.42
QW
6.6
7.4
6.6
0.46
0.095
6.87
-0.57
-0.05
ox
8.5
8.5
8.4
0.06
0.012
8.47
-0.01
0.51
QZ
7.3
7.3
7.8
0.29
0.059
7.47
-0.36
0.16
R
10.6
10.4
9.7
0.47
0.106
10.23
0.60
1.12
RB
9.8
8.9
10.4
0.75
0.177
9.70
0.41
0.94
RD
7.5
9.6
9.1
1.10
0.248
8.73
0.08
0.60
RF
5.3
7.3
6.4
1.00
0.236
6.33
-0.75
-0.23
RG
9.5
8.2
8.6
0.67
0.154
8.77
0.09
0.61
RI
8.0
5.6
6.8
1.20
0.284
6.80
-0.59
-0.07
RR
11.3
10.9
10.7
0.31
0.071
10.97
0.85
1.37
RV







•
RZ







•
S
8.1
8.2
8.5
0.21
0.047
8.27
-0.08
0.44
sc
10.2
7.3
7.4
1.65
0.343
8.30
-0.07
0.45
SD
11.7
8.4
10.8
1.71
0.390
10.30
0.62
1.14
SF
7.5
7.1
7.8
0.35
0.083
7.47
-0.36
0.16
SG
6.9
5.7
6.1
0.61
0.142
6.23
-0.79
-0.27
SI
6.2
5.7
6.8
0.55
0.130
6.23
-0.79
-0.27
SL
8.8
13.0
8.5
2.52
0.532
10.10
0.55
1.07
SM
7.8
8.5
8.0
0.36
0.083
8.10
-0.14
0.38
SN
8.9
11.2
9.3
1.23
0.272
9.80
0.45
0.97
SO
5.6
5.9
5.7
0.15
0.035
5.73
-0.96
-0.44
SR
6.5
7.6
5.4
1.10
0.260
6.50
-0.69
-0.17
SS
9.4
9.3
9.3
0.06
0.012
9.33
0.29
0.81
ST
7.1
6.8
5.5
0.85
0.189
6.47
-0.71
-0.18
SU
9.0
6.2
6.8
1.47
0.331
7.33
-0.41
0.12
• =
No data submitted

TAG SYMBOLS

IT = Above control limit
s
III
Insufficient data
x =
Determined to be an outlier
JJ. = Below control limit

-------
CRD-LV Performance Evaluation: Gross Alpha-Beta in Water, 26-Jan-1996 14/16
Gross Beta
Lab Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known) Tag
SV








•
SX
11.1
10.2
9.6
0.75
0.177
10.30
0.62
1.14

sz
8.4
7.4
8.3
0.55
0.118
8.03
-0.16
0.36

T
6.3
6.4
6.8
0.26
0.059
6.50
-0.69
-0.17

TD
14.6
11.1
8.0
3.30
0.780
11.23
0.95
1.47

TG
5.9
6.9
6.7
0.53
0.118
6.50
-0.69
-0.17

TH








•
H








•
TL
6.4
7.0
7.2
0.42
0.095
6.87
-0.57
-0.05

TN
10.4
11.4
9.9
0.76
0.177
10.57
0.71
1.24

TQ
5.6
6.4
6.6
0.53
0.118
6.20
-0.80
-0.28

TW
4.7
11.3
8.9
3.34
0.780
8.30
-0.07
0.45

TY
6.8
5.9
6.1
0.47
0.106
6.27
-0.78
-0.25

U
9.9
8.8
9.2
0.56
0.130
9.30
0.28
0.80

UA
9.1
9.5
10.3
0.61
0.142
9.63
0.39
0.91

UE
11.7
12.2
10.2
1.04
0.236
11.37
0.99
1.51

UN
9.2
11.2
11.7
1.32
0.295
10.70
0.76
1.28

UP
7.7
8.3
7.2
0.55
0.130
7.73
-0.27
0.25

UQ
8.2
8.9
9.1
0.47
0.106
8.73
0.08
0.60

uw
16.3
14.7
13.2
1.55
0.366
14.73
2.16
2.68

VA
8.4
8.8
6.9
1.00
0.224
8.03
-0.16
0.36

VC








*
VH
7.3
9.8
7.5
1.39
0.295
8.20
-0.11
0.42

VI
5.1
4.9
4.4
0.36
0.083
4.80
-1.28
-0.76

VJ
7.0
6.5
6.6
0.26
0.059
6.70
-0.62
-0.10

VO
6.5
8.0
9.7
1.60
0.378
8.07
-0.15
0.37

VT
10.2
10.4
10.8
0.31
0.071
10.47
0.68
1.20

W
7.7
6.3
7.2
0.71
0.165
7.07
-0.50
0.02

WE
9.7
9.6
9.3
0.21
0.047
9.53
0.36
0.88

WF
11.5
11.2
10.7
0.40
0.095
11.13
0.91
1.43

WH
4.5
5.9
6.7
1.11
0.260
5.70
-0.97
-0.45

WJ








• •
WN








•
WO
14.2
11.4
12.1
1.46
0.331
12.57
1.41
1.93

WP








•
WQ
10.0
9.0
9.5
0.50
0.118
9.50
0.34
0.87

X
7.1
9.9
7.9
1.44
0.331
8.30
-0.07
0.45

Data sorted by Laboratory Average
Average
Tag
Lab
Average
Tag
Lab
Average
Tag
Lab
3.20

GZ
4.90

CO
5.73

SO
4.33

KT
5.47

DI
5.80

QU
4.37

QP
5.63

AJ
6.00

JQ
4.70

AU
5.67

I
6.20

TQ
4.80

VI
5.70

WH
6.20

C
• = No data submitted
0 s Insufficient data
TAG SYMBOLS
x = Determined to be an outlier
ft = Above control limit
li s Below control limit

-------
15/16 CRD-LV Performance Evaluation: Gross Alpha-Beta in Water, 26-Jan-1996
Gross Beta
Data sorted by Laboratory Average
Average
Tag
Lab
Average
Tag
Lab
Average
Tag
Lab
6.23

SI
8.00

DO
9.27

ID
6.23

SG
8.03

VA
9.30

U
6.27

TY
8.03

SZ
9.33

ss
6.33

RF
8.07

VO
9.40

BM
6.37

OF
8.10

OB
9.50

WQ
6.47

ST
8.10

SM
9.53

WE
6.47

BN
8.13

NP
9.60

NK
6.47

AF
8.17

GT
9.60

AW
6.50

TG
8.17

EV
9.63

UA
6.50

T
8.20

VH
9.67

OX
6.50

SR
8.27

S
9.67

NA
6.57

JY
8.30

X
9.67

KX
6.63

O
8.30

TW
9.70

RB
6.70

VJ
8.30

SC
9.70

QC
6.77

QQ
8.37

BK
9.77

DH
6.80

RI
8.40

JN
9.77

Q
6.80

BO
8.40

JM
9.80

SN
6.87

TL
8.43

AK
10.00

AL
6.87

QW
8.47

QX
10.03

BS
6.90

HP
8.47

LF
10.07

HK
6.93

CE
8.47

JG
10.10

SL
7.00

BG
8.47

AP
10.13

EB
7.07

W
8.50

DS
10.20

PM
7.13

CJ
8.57

PQ
10.20

CG
7.13

PR
8.60

ff
10.23

R
7.27

JP
8.67

FN
10.23

PG
7.33

SU
8.73

UQ
10.23

EW
7.33

J
8.73

RD
10.30

SX
7.33

BB
8.73

NT
10.30

SD
7.47

SF
8.73

BA
10.40

LR
7.47

cs
8.73

AH
10.47

VT
7.47

QZ
8.77

RG
10.47

JS
7.63

BL
8.80

FZ
10.53

PV
7.67

M
8.87

GQ
10.57

TN
7.67

KH
8.90

HL
10.70

UN
7.67

AR
8.93

HI
10.83

LT
7.73

UP
8.97

N
10.87

CK
7.73

P
9.00

QT
10.97

RR
7.87

AE
9.00

PB
10.97

K
7.90

NO
9.03

E
11.00

OS
7.90

MF
9.03

DZ
11.13

WF
7.93

CA
9.07

BH
11.23

TD
7.93

DT
9.20

KE
11.37

UE
7.93

DE
9.27

BC
11.50

DB
• = No data submitted
0 = Insufficient data

TAG SYMBOLS
x = Determined to be an outlier
IT
li
s Above control limit
= Below control limit

-------
CRD-LV Performance Evaluation: Gross Alpha-Beta in Water, 26-Jan-1996 16 / 16
Gross Beta
Data sorted by Laboratory Average
Average
Tag
Lab
Average
Tag
Lab
Average
Tag
Lab
11.67

L
13.10

OA
19.17
X
A
12.00

EO
13.10

NJ
21.03
X
OY
12.57

WO
13.37

CX
30.27
X
NB
12.77

D
14.73

UW
45.37
X
MX
responding labs
Frequency distribution
10-
responding labs
-4	-2	0	+2	+4
Normalized deviation of the mean from the known value
Frequency distribution
-2	0+2+4
Normalized deviation of the mean from the grand average
• s No data submitted
0 = Insufficient data
TAG SYMBOLS
x s Determined to be an outlier
ft s Above control limit
li = Below control limit

-------
United States	Office of Research and	EPA/600/R-96/039
Environmental Protection	Development	April 1996
Agency	Washington, DC 20460
Iodine in Water
Performance
Evaluation Study
A Statistical Evaluation of
the February 2, 1996 Data
023RSL96 cov-

-------
Iodine in Water
Performance Evaluation Study
February 2, 1996
Environmental Protection Agency
National Exposure Research Laboratory
Characterization Research Division
Las Vegas, Nevada

-------
UNITED STATES ENVIRONMENTAL PROTECTION AGENCY
OFFICE OF RESEARCH AND DEVELOPMENT
NATIONAL EXPOSURE RESEARCH LABORATORY
CHARACTERIZATION RESEARCH DIVISION-LAS VEGAS
P.O. BOX 93478
LAS VEGAS, NEVADA 89193-3478
(702/798-2100)
Dear Participant,
Enclosed are the results of the Analytical Sciences Branch (CRD-LV)
Performance Evaluation Study for Iodine in Water; February 2, 1996.
The known value for each analysis was determined by gravimetric methods,
checked by chemical analyses performed by CRD-LV's Radiochemistry Laboratory,
and compared to the participating laboratories' grand average.
The expected precision, determined by the known value, was taken from
'Table 3. Laboratory Precision: One Standard Deviation Values and Control Limits
for Various Analyses", which is based on data accumulated over the years by the
Performance Evaluation Program, and can be found in the Environmental Radioactivity
Performance Evaluation Studies Program and Radioactive Standards Distribution
Program information brochure.
Please take a few minutes to review this report and the analytical data your
laboratory submitted to us. If there are any apparent discrepancies, please notify us
immediately.
We encourage you to make use of the computer-automated data-entry system
that has been in place for some time now. As the number of participants increases,
and it becomes unrealistic for us to receive results by mail or FAX, the computer
system will be our only avenue for accepting data.
If you have any questions or comments, please send a message via the data-entry
system or contact George Dilbeck at 702/798-2104 or Patricia Honsa at 702/798-2141.
Sincerely,
George Dilbeck
Team Leader
RADQA Program
Enclosure

-------
NOTICE
This material has been funded wholly by
the U.S. Environmental Protection Agency.
It has been subjected to the Agency's review,
and has been approved for publication as
an EPA document.

-------
CRD-LV Performance Evaluation: Iodine in Water, 2-Feb-1996
1/7
The following pages consist of separate sections for each of the nuclides in this study with four
parts per section. After the first, each part is separated from the next by a new page or a thick
horizontal bar. The first page of each section is a statistical summary for the nuclide and starts
with a statement of the known value, the control limits, and the warning limits.
The warning limits are placed at two normalized standard deviations above and below the
known value and the control limits are three normalized standard deviations above and below
the known value. If you keep control charts, these values will be useful for anticipating problems
with the accuracy of your analytical methods.
The coin shaped pie chart at the top of the summary page shows the fate of all the samples
sent out in number and percentage terms. The pie chart starts at the top and rotates clockwise.
The first sector represents those participants who submitted analytical results within both the
warning and control limits. The next sector represents those who are in the warning region but
not out of control. The third sector represents those who are out of control, but have passed
the outlier test. The fourth sector represents those who have failed the outlier test. The last
sector represents those participants who have failed to respond properly. This is the case if no
analytical results were returned, or less than three determinations were reported, or if the results
were received too late. The reeding on the edge of the coin is spaced at one percent intervals, and
the sector shading becomes darker as the data reliability decreases. Sectors with zero width are
not shown.
The table in the center shows a number of statistical quantities calculated from the submitted
data based on the mean and median values in relation to the known value, both before and after
outlier removal. The lower pie chart uses the same construction as the upper chart and shows
the distribution of properly submitted data in terms of deviation from the known value divided
into sectors representing one, two, three, and greater than three normalized standard deviations.
The second part is an alphabetical listing, in lab-code order, of submitted data and several
calculated quantities. An entry that is shaded has been rejected because of one of the reasons
listed above or failure of the outlier test. The fifth and sixth columns are a measure of laboratory
precision. The Range analysis is a normalized value that you may use to keep precision control
charts. If this value is between 2.0 and 3.0, your analytical process precision is in the warning
zone; if it exceeds 3.0 it is out of control. The eighth and ninth columns are the differences from
the mean of all non-outliers and from the known value, respectively. A tag symbol may appear in
the last column. Each page with tags has a symbol definition summary at the bottom. If there is
no tag symbol, the data is within the control limits, but it may be in the warning zone.
The third part is a three-column listing of result average, tag symbol, and lab-code in average
order excluding those labs not responding properly. In this order, all outliers and out-of-control
results appear at the top or bottom of the list.
The last part is two bar chart displays showing frequency distributions of responding
participants. The first chart places the known value at the center and a bar at each 0.2 unit of
expected precision. The second chart places the mean of the reported measurements at the center
and a bar at each 0.2 unit of standard deviation. In both cases, a bar includes those results within
0.1 unit up to the maximum of six. Any results more than six units from the center value are
shown cumulatively by a shaded bar one past the sixth unit. If the centred tendency of the known
value distribution falls away from the center, an error in accuracy is indicated. If the distribution
is broad, poor precision is indicated. The mean value distribution is similar but uses the average
and standard deviation of reported results as its basis.

-------
2/7	CRD-LV Performance Evaluation: Iodine in Water, 2-Feb-1996
The Range Analysis(R + SR) is calculated from the range, mean range and standard error of
the range values. The range is the difference between the maximum and minimum results for the
laboratory. The mean range is calculated by multiplying the expected precision by 1.693(for three
results). The standard error of the range is calculated by multiplying the mean range by 2.575(for
three results), subtracting the mean range from this product, and dividing the result by 3. If the
range is greater than the mean range, then the range analysis is calculated by subtracting the
mean range from the range, dividing the result by the standard error of the range and adding 1.
If the mean range is greater than or equal to the range, then the range analysis is calculated by
dividing the range by the mean range.
The normalized deviation of the mean from the grand average is calculated from the deviation
of the mean from the grand average and the standard error of the mean values. The deviation of
the mean from the grand average is calculated by subtracting the grand average from the
average of the laboratory's three results. The standard error of the mean is calculated by
dividing the expected precision by the square root of 3(the number of results). The normalized
deviation of the mean from the grand average is calculated by dividing the deviation of the mean
from the grand average by the standard error of the mean.
The normalized deviation of the mean from the known value is calculated from the deviation of
the mean from the known value and the standard error of the mean values. The deviation of the
mean from the known value is calculated by subtracting the known value from the average of the
laboratory's three results. The standard error of the mean is calculated by dividing the expected
precision by the square root of 3(the number of results). The normalized deviation of the mean
from the known value is calculated by dividing the deviation of the mean from the known value by
the standard error of the mean.
A complete explanation of the statistical calculations involved in the report may be found in
the Environmental Radioactivity Performance Evaluation Studies Program information brochure
[Draft Revision of EPA-600/4-81-004], available from Patricia Honsa, CRD-LV, 702/798-2141.

-------
CRD-LV Performance Evaluation: Iodine in Water, 2-Feb-1996	3/7
V			___	___
Iodine-131	Statistical Summary	101 Participants
The known value of this nuclide is 67.0 pCi/1 with an expected precision of 7.0; the control limits
are 54.9 to 79.1; the warning regions are 54.9 to 58.9 and 75.1 to 79.1
Statistic	Respondents	Non-outliers
Mean
69.48
Grand Avg 68.53
Std. Dev.
9.18
4.93
Variance
84.32
24.29
% Coef. of Var.
13.22
7.19
% deviation of mean from known value
3.70
2.29
Norm. dev. of mean from known value
0.27
0.31
Median
68.83
68.67
% deviation of median from known value
2.74
2.49
Norm. dev. of median from known value
0.20
0.34

-------
4/7

CRD-LV Performance Evaluation: Iodine in Water,
2-Feb-1996

Iodine-131







Lab
Res. 1
Res. 2

Exper.
Rng anal

Normalized deviation
Res. 3
Sigma
(R + SR)
Average
(grand-avg)
(known) Tag
A
57.0
56.0
56.0
0.58
0.084
56.33
-3.02
-2.64
AF
64.0
66.0
72.0
4.16
0.675
67.33
-0.30
0.08
AI







•
AJ
72.0
73.0
72.0
0.58
0.084
72.33
0.94
1.32
AK
63.0
63.0
63.0
0.00
0.000
63.00
-1.37
-0.99
AL
69.0
71.0
61.0
5.29
0.844
67.00
-0.38
0.00
AP
72.0
68.0
67.0
2.65
0.422
69.00
0.12
0.49
AU
67.0
68.0
66.0
1.00
0.169
67.00
-0.38
0.00
AW
68.0
66.0
66.0
1.15
0.169
66.67
-0.46
-0.08
AY
78.0
75.0
75.0
1.73
0.253
76.00
1.85
2.23
AZ
68.0
70.0
69.0
1.00
0.169
69.00
0.12
0.49
BA
72.0
71.0
75.0
2.08
0.338
72.67
1.02
1.40
BC
61.0
63.0
63.0
1.15
0.169
62.33
-1.53
-1.15
BH
71.0
69.0
73.0
2.00
0.338
71.00
0.61
0.99
BL
67.0
63.0
64.0
2.08
0.338
64.67
-0.96
-0.58
BM
72.0
72.0
71.0
0.58
0.084
71.67
0.77
1.15
BO
68.0
63.0
67.0
2.65
0.422
66.00
-0.63
-0.25
C
70.0
73.0
71.0
1.53
0.253
71.33
0.69
1.07
CA
69.0
72.0
71.0
1.53
0.253
70.67
0.53
0.91
CE
73.0
74.0
72.0
1.00
0.169
73.00
1.10
1.48
CJ
69.0
71.0
75.0
3.06
0.506
71.67
0.77
1.15
CS
77.0
71.0
75.0
3.06
0.506
74.33
1.43
1.81
CX
64.0
62.0
68.0
3.06
0.506
64.67
-0.96
-0.58
D
79.0
80.0
72.0
4.36
0.675
77.00
2.09
2.47
DE
66.0
66.0
67.0
0.58
0.084
66.33
-0.54
-0.16
DR
70.0
69.0
72.0
1.53
0.253
70.33
0.45
0.82
DT
62.0
64.0
65.0
1.53
0.253
63.67
-1.20
-0.82
DY
63.0
62.0
63.0
0.58
0.084
62.67
-1.45
-1.07
E
67.0
68.0
66.0
1.00
0.169
67.00
-0.38
0.00
EB
64.0
64.0
64.0
0.00
0.000
64.00
-1.12
-0.74
EH
82.0
64.0
75.0
9.07
1.988
73.67
1.27
1.65
FE
54.0
49.0
430
5.61
0.928
48.67
-4,92
-4.54 x
GI
65.0
65.0
63.0
1.15
0.169
64.33
-1.04
-0.66
HE
67.0
57.0
.61.0
5.03
0.844
61.67
-1.70
-1.32
HK
63.0
62.0
64.0
1.00
0.169
63.00
-1.37
-0.99
HP
78.0
76.0
68.0
5.29
0.844
74.00
1.35
1.73
HX
57.0
61.0
56.0
2.65
0.422
58.00
-2.61
-2.23
I
79.0
74.0
69.0
5.00
0.844
74.00
1.35
1.73
IA
83.0
95.0
91.0
6.11
1.024
89.67
5:23
5.61 x
IU
69.0
67.0
71.0
2.00
0.338
69.00
0.12
0.49
J
64.0
65.0
64.0
0.58
0.084
64.33
-1.04
-0.66
JR
70.0
72.0
77.0
3.61
0.591
73.00
1.10
1.48
JS
66.0
66.0
67.0
0.58
0.084
66.33
-0.54
-0.16
JY
72.0
73.0
76.0
2.08
0.338
73.67
1.27
1.65
K
65.0
64.0
65.0
0.58
0.084
64.67
-0.96
-0.58
• =
No data submitted

TAG SYMBOLS

ft = Above control limit
0 3
Insufficient data
x =
Determined to be an outlier
Ji s Below control limit

-------
?	

CRD-LV Performance Evaluation: Iodine in Water,
2-Feb-1996

5/7
Iodine-131








Lab
Res. 1
Res. 2

Exper.
Rng anal

Normalized deviation

Res. 3
Sigma
(R + SR)
Average
(grand-avg)
(known) Tae
KL
63.0
64.0
70.0
3.79
0.591
65.67
-0.71
-0.33

KM
64.0
61.0
66.0
2.52
0.422
63.67
-1.20
-0.82

KX
66.0
64.0
63.0
1.53
0.253
64.33
-1.04
-0.66

L
74.0
73.0
73.0
0.58
0.084
73.33
1.19
1.57

LF
69.0
70.0
71.0
1.00
0.169
70.00
0.36
0.74

LT
53.0
57.0
55.0
2.00
0.338
55.00
-3.35
-2.97

M
60.0
61.0
65.0
2.65
0.422
62.00
-1.62
-1.24

MN









MP
62.0
67.0
63.0
2.65
0.422
64.00
-1.12
-0.74

MV








• ^
N
73.0
73.0
74.0
0.58
0.084
73.33
1.19
1.57

NJ
63.0
70.0
67.0
3.51
0.591
66.67
-0.46
-0.08

NO
72.0
75.0
75.0
1.73
0.253
74.00
1.35
1.73

O
64.0
65.0
64.0
0.58
0.084
64.33
-1.04
-0.66

OA
77.0
76.0
77.0
0.58
0.084
76.67
2.01
2.39

OB
71.0
74.0
74.0
1.73
0.253
73.00
1.10
1.48

OT








•
PB
134.0
135.0
135.0
0.58
0.084
134.67
16.36
16.74
X
PE








•
PV
60.0
71.0
73.0
7.00
1.185
68.00
-0.13
0.25

PW
63.0
65.0
65.0
1.15
0.169
64.33
-1.04
-0.66

Q
68.0
69.0
70.0
1.00
0.169
69.00
0.12
0.49

QJ
68.0
66.0
66.0
1.15
0.169
66.67
-0.46
-0.08

QX
71.0
69.0
67.0
2.00
0.338
69.00
0.12
0.49

QZ
65.0
66.0
69.0
2.08
0.338
66.67
-0.46
-0.08

R
64.0
66.0
63.0
1.53
0.253
64.33
-1.04
-0.66

s
68.0
70.0
69.0
1.00
0.169
69.00
0.12
0.49

sc
65.0
66.0
69.0
2.08
0.338
66.67
-0.46
-0.08

SF
74.0
67.0
72.0
3.61
0.591
71.00
0.61
0.99

SM
70.0
67.0
67.0
1.73
0.253
68.00
-0.13
0.25

SS
70.0
71.0
71.0
0.58
0.084
70.67
0.53
0.91

sv
70.0
69.0
68.0
1.00
0.169
69.00
0.12
0.49

sz








~
TA
61.0
82.0
76.0
10.82
2.470
73.00
1.10
1.48

TC








•
TD
64.0
66.0
61.0
2.52
0.422
63.67
-1.20
-0.82

TH
70.0
69.0
71.0
1.00
0.169
70.00
0.36
0.74

TI








•
TL
65.0
85.0
88.0
1.73
0.253
86.00
4.32
4.70
X
TQ
67.0
68.0
71.0
2.08
0.338
68.67
0.03
0.41

U
80.0
85.0
79.0
3.21
0.506
81.33
3.17
3.55
ir
UC









UE
69.0
63.0
65.0
.3.06
0.506
65.67
-0.71
-0.33

UI








•
UN
72.0
68.0
69.0
2.08
0.338
69.67
0.28
0.66

• = No data submitted

TAG SYMBOLS

ft = Above control limit
t 0 s Insufficient data
x =
Determined to be an outlier
U = Below control limit

-------
(c	~
6/7

CRD-LV Performance Evaluation: Iodine in Water,
2-Feb«1996

	^
Iodine-131











Lab
Res. 1
Res. 2


Exper.
Rng anal


Normalized deviation

Res. 3 Sigma
(R + SR)
Average (grand-avg) (known) Tag
UP
75.0
75.0

75.0 0.00
0.000
75.00
1.60
1.98

uw
68.0
70.0

68.0 1.15
0.169
68.67

0.03
0.41

VA
72.0
72.0

69.0 1.73
0.253
71.00
0.61
0.99

VC
71.0
72.0

76.0 2.65
0.422
73.00

1.10
1.48

VM
76.0
71.0

75.0 2.65
0.422
74.00
1.35
1.73

VN
72.0
71.0

72.0 0.58
0.084
71.67

0.77
1.15

W
61.0
67.0

68.0 3.79
0.591
65.33

0.79
-0.41

WM











•
WO
68.0
74.0

63.0 5.51
0.928
68.33

0.05
0.33

X
81.0
82.0

85.0 2.08
0.338
82.67

3.50
3.88
It
Y
68.0
63.0

66.0 2.52
0.422
65.67

0.71
-0.33




Data sorted by Laboratory Averaj





Average

Tag
Lab

Average
Tag
Lab
Average
Tag

Lab
48.67

X
FE

66.33

DE

71.00


BH
55.00


LT

66.67

SC

71.33


C
56.33


A

66.67

QZ

71.67


VN
58.00


HX

66.67

QJ

71.67


CJ
61.67


HE

66.67

NJ

71.67


BM
62.00


M

66.67

AW

72.33


AJ
62.33


BC

67.00

E

72.67


BA
62.67


DY

67.00

AU

73.00


VC
63.00


HK

67.00

AL

73.00


TA
63.00


AK

67.33

AF

73.00


OB
63.67


TD

68.00

SM

73.00


JR
63.67


KM

68.00

PV

73.00


CE
63.67


DT

68.33

WO

73.33


N
64.00


MP

68.67

uw

73.33


L
64.00


EB

68.67

TQ

73.67


JY
64.33


R

69.00

sv

73.67


EH
64.33


PW

69.00

s

74.00


VM
64.33


O

69.00

Qx

74.00


NO
64.33


KX

69.00

Q

74.00


I
64.33


J

69.00

IU

74.00


HP
64.33


GI

69.00

AZ

74.33


CS
64.67


K

69.00

AP

75.00


UP
64.67


CX

69.67

UN

76.00


AY
64.67


BL

70.00

TH

76.67


OA
65.33


W

70.00

LF

77.00


D
65.67


Y

70.33

DR

81.33
ft

U
65.67


UE

70.67

SS

82.67
ft

X
65.67


KL

70.67

CA

86.00
X

TL
66.00


BO

71.00

VA

89.67
X

LA
66.33


JS

71.00

SF
134.67
X

PB
• = No data submitted


TAG SYMBOLS


It
= Above control limit
0 = Insufficient data
^	


x = Determined to be an outlier


s Below control limit
	

-------
CRD-LV Performance Evaluation: Iodine in Water, 2-Feb-1996	111
Iodine-131
% responding laba	Frequency diatribution
10- -

	¦->	¦ . ml
-6	-4	"2	0	+2	+4	+6
Normalized deviation of the mean from the known value
responding labs		Frequency distribution
10- -
¦I,-I.
I	T	1 M T M \	I 	1—¦¦ t —	r"
-6	-4"	"2	0	+2	+4	+6
Normalized deviation of the mean from the grand average

-------
United States	Office of Research and	EPA/600/R-96/046
Environmental Protection	Development	ApriM996
Agency	Washington, DC 20460
&EPA Tritium in Water
Performance
Evaluation Study
A Statistical Evaluation of
the March 8, 1996 Data

-------
Tritium in Water
Performance Evaluation Study
March 8, 1996
Environmental Protection Agency
National Exposure Research Laboratory
Characterization Research Division
Las Vegas, Nevada

-------
UNITED STATES ENVIRONMENTAL PROTECTION AGENCY
OFFICE OF RESEARCH AND DEVELOPMENT
NATIONAL EXPOSURE RESEARCH LABORATORY
CHARACTERIZATION RESEARCH DIVISION-LAS VEGAS
P.O. BOX 93478
LAS VEGAS, NEVADA 89193-3478
(702/798-2100)
Dear Participant,
Enclosed are the results of the Analytical Sciences Branch (CRD-LV)
Performance Evaluation Study for Tritium in Water; March 8, 1996.
The known value for each analysis was determined by gravimetric methods,
checked by chemical analyses performed by CRD-LV's Radiochemistry Laboratory,
and compared to the participating laboratories' grand average.
The expected precision, determined by the known value, was taken from
'Table 3. Laboratory Precision: One Standard Deviation Values and Control Limits
for Various Analyses", which is based on data accumulated over the years by the
Performance Evaluation Program, and can be found in the Environmental Radioactivity
Performance Evaluation Studies Program and Radioactive Standards Distribution
Program information brochure.
Please take a few minutes to review this report and the analytical data your
laboratory submitted to us. If there are any apparent discrepancies, please notify us
immediately.
We encourage you to make use of the computer-automated data-entry system
that has been in place for some time now. As the number of participants increases,
and it becomes unrealistic for us to receive results by mail or FAX, the computer
system will be our only avenue for accepting data.
If you have any questions or comments, please send a message via the data-entry
system or contact George Dilbeck at 702/798-2104 or Patricia Honsa at 702/798-2141.
George Dilbeck
Team Leader
RADQA Program
Enclosure

-------
NOTICE
This material has been funded wholly by
the U.S. Environmental Protection Agency.
It has been subjected to the Agency's review,
and has been approved for publication as
an EPA document.

-------
CRD-LV Performance Evaluation: Tritium in Water, 8-Mar-1996	1/9
The following pages consist of separate sections for each of the nuclides in this study with four
parts per section. After the first, each part is separated from the next, by a new pape nr a thick
horizontal bar. The first page of each section is a statistical summary for the nuclide and starts
with a statement of the known value, the control limits, and the warning limits.
The warning limits are placed at two normalized standard deviations above and below the
known value and the control limits are three normalized standard deviations above and below
the known value. If you keep control charts, these values will be useful for anticipating problems
with the accuracy of your analytical methods.
The coin shaped pie chart at the top of the summary page shows the fate of all the samples
sent out in number and percentage terms. The pie chart starts at the top and rotates clockwise.
The first sector represents those participants who submitted analytical results within both the
warning and control limits. The next sector represents those who are in the warning region but
not out of control. The third sector represents those who are out of control, but have passed
the outlier test. The fourth sector represents those who have failed the outlier test. The last
sector represents those participants who have failed to respond properly. This is the case if no
analytical results were returned, or less than three determinations were reported, or if the results
were received too late. The reeding on the edge of the coin is spaced at one percent intervals, and
the sector shading becomes darker as the data reliability decreases. Sectors with zero width are
not shown.
The table in the center shows a number of statistical quantities calculated from the submitted
data based on the mean and median values in relation to the known value, both before and after
outlier removal. The lower pie chart uses the same construction as the upper chart and shows
the distribution of properly submitted data in terms of deviation from the known value divided
into sectors representing one, two, three, and greater than three normalized standard deviations.
The second part is an alphabetical listing, in lab-code order, of submitted data and several
calculated quantities. An entry that is shaded has been rejected because of one of the reasons
listed above or failure of the outlier test. The fifth and sixth columns are a measure of laboratory
precision. The Range analysis is a normalized value that you may use to keep precision control
charts. If this value is between 2.0 and 3.0, your analytical process precision is in the warning
zone; if it exceeds 3.0 it is out of control. The eighth and ninth columns are the differences from
the mean of all non-outliers and from the known value, respectively. A tag symbol may appear in
the last column. Each page with tags has a symbol definition summary at the bottom. If there is
no tag symbol, the data is within the control limits, but it may be in the warning zone.
The third part is a three-column listing of result average, tag symbol, and lab-code in average
order excluding those labs not responding properly. In this order, all outliers and out-of-control
results appear at the top or bottom of the list.
The last part is two bar chart displays showing frequency distributions of responding
participants. The first chart places the known value at the center and a bar at each 0.2 unit of
expected precision. The second chart places the mean of the reported measurements at the center
and a bar at each 0.2 unit of standard deviation. In both cases, a bar includes those results within
0.1 unit up to the maximum of six. Any results more than six units from the center value are
shown cumulatively by a shaded bar one past the sixth unit. If the central tendency of the known
value distribution falls away from the center, an error in accuracy is indicated. If the distribution
is broad, poor precision is indicated. The mean value distribution is similar but uses the average
and standard deviation of reported results as its basis.

-------
2/9
CRD-LV Performance Evaluation: Tritium in Water, 8-Mar-1996
The Range Analysis(R + SR) is calculated from, the range, mean range and standard error of
the range values. The range is the difference between the maximum and minimum results for the
laboratory. The mean range is calculated by multiplying the expected precision by 1.693(for three
results). The standard error of the range is calculated by multiplying the mean range by 2.575(for
three results), subtracting the mean range from this product, and dividing the result by 3. If the
range is greater than the mean range, then the range analysis is calculated by subtracting the
mean range from the range, dividing the result by the standard error of the range and adding 1.
If the mean range is greater than or equal to the range, then the range analysis is calculated by
dividing the range by the mean range.
The normalized deviation of the mean from the grand average is calculated from the deviation
of the mean from the grand average and the standard error of the mean values. The deviation of
the mean from the grand average is calculated by subtracting the grand average from the
average of the laboratory's three results. The standard error of the mean is calculated by
dividing the expected precision by the square root of 3(the number of results). The normalized
deviation of the mean from the grand average is calculated by dividing the deviation of the mean
from the grand average by the standard error of the mean.
The normalized deviation of the mean from the known value is calculated from the deviation of
the mean from the known value and the standard error of the mean values. The deviation of the
mean from the known value is calculated by subtracting the known value from the average of the
laboratory's three results. The standard error of the mean is calculated by dividing the expected
precision by the square root of 3(the number of results). The normalized deviation of the mean
from the known value is calculated by dividing the deviation of the mean from the known value by
the standard error of the mean.
A complete explanation of the statistical calculations involved in the report may be found in
the Environmental Radioactivity Performance Evaluation Studies Program information brochure
[Draft Revision of EPA-600/4-81-004], available from Patricia Honsa, CRD-LV, 702/798-2141.

-------
CRD-LV Performance Evaluation: Tritium in Water, 8*Mar-1996
3/9
Tritium	Statistical Summary	172 Participants
The known value of this nuclide is 22002 pCi/1 with an expected precision of 2200.0; the control limits
are 18185.1 to 25818.9; the warning regions are 18185.1 to 19455.3 and 24548.7 to 25818.9
26(15.1 %) Failed to respond
15(8.7 %) Outliers
2(1.2 %) Out of control '*
but not an outlier
Statistic
123(71.5 %) Within all limits
Respondents
••6(3.5 %) In warning zone
but within control
Non-outliers
Mean
Std. Dev.
Variance
% Coef. of Var.
% deviation of mean from known value
Norm. dev. of mean from known value
Median
% deviation of median from known value
Norm; dev. of median from known value
20656.95
4050.81
16409026.53
19.61
-6.11
-0.33
21466.50
-2.43
-0.13
Grand Avg 21573.18
1274.81
1625136.95
5.91
-1.95
-0.34
21533.33
-2.13
-0.37
17(11.6 %) More than 3 norm. S.D. \
6(4.1 %) Between 2 and 3 norm. S.D.
91(62.3 %) Within 1 norm. S.D.
of known value
32(21.9 %) Between 1 and 2 norm. S.D.

-------
4/9
CRD-LV Performance Evaluation: Tritium in Water, 8-Mar-1996
f" • —
Tritium
Lab Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known) Tag
A
22390.0
22130.0
22330.0
136.23
0.070
22283.33
0.56
0.22

AE
23054.0
22909.0
22905.0
84.90
0.040
22956.00
1.09
0.75

AF
21438.0
21433.0
21284.0
87.67
0.041
21385.00
-0.15
-0.49

AH
AI
. 21504.0
21604.0
21704.0
100.12
0.054
21604.00
0.02
-0.31

AJ
22331.0
22977.0
22827.0
338.12
0.173
22711.67
0.90
0.56
•
AK
23320.0
23400.0
23330.0
43.57
0.021
23350.00
1.40
1.06

AP
20928.0
20885.0
20784.0
73.73
0.039
20865.67
-0.56
-0.89

AU
21500.0
21800.0
21700.0
152.80
0.081
21666.67
0.07
-0.26

AW
21597.0
21199.0
21292.0
208.13
0.107
21362.67
-0.17
-0.50

AY
21644.0
22320.0
22217.0
364.24
0.181
22060.33
0.38
0.05

AZ
21471.0
21017.0
22773.0
911.48
0.471
21753.67
0.14
-0.20

BA
23338.0
24383.0
23634.0
538.60
0.281
23785.00
1.74
1.40

BB
21960.0
23380.0
23117.0
755.45
0.381
22819.00
0.98
0.64

BC
19900.0
19630.0
19860.0
145.76
0.072
19796.67
-1.40
-1.74

BG
21200.0
20800.0
20800.0
230.94
0.107
20933.33
-0.50
-0.84

BL
21677.0
21618.0
21635.0
29.92
0.016
21643.33
0.06
-0.28

BM
2200.0
2230.0
2210.0
15.28
0.008
2213.33
-15.24
-15.58
X
BO
22300.0
22400.0
22200.0
100.12
0.054
22300.00
0.57
0.23

BW
24000.0
24100.0
24500.0
264.54
0.134
24200.00
2.07
1.73

C
CA
18039.0
20803.0
19650.0
1388.32
0.742
19497.33
-1.63
-1.97

CE
21620.0
22050.0
21440.0
313.41
0.164
21703.33
0.10
-0.24
• >
CG
23485.0
21376.0
20467.0
1548.24
0.810
21776.00
0.16
-0.18

CJ
22000.0
22000.0
22000.0
0.00
0.000
22000.00
0.34
0.00

CK
21112.0
21463.0
21213.0
180.66
0.094
21262.67
-0.24
-0.58

CO
20200.0
19700.0
20100.0
264.61
0.134
20000.00
-1.24
-1.58

CS
23400.0
22600.0
23300.0
435.88
0.215
23100.00
1.20
0.86

cx
2210.0
2235.0
2214.0
13.43
0.007
2219.67
-15.24
-15.57
X
D
21226.0
20969.0
21739.0
392.00
0.207
21311.33
-0.21
-0.54

DD








•
DE
21736.0
21918.0
22101.0
182.50
0.098
21918.33
0.27
-0.07

DH
23200.0
23900.0
24100.0
472.56
0.242
23733.33
1.70
1.36

DI
20500.0
20700.0
21500.0
529.13
0.268
20900.00
-0.53
-0.87

DR
22529.0
22117.0
22117.0
237.81
0.111
22254.33
0.54
0.20

DT
21700.0
21500.0
21900.0
199.94
0.107
21700.00
0.10
-0.24

E
23781.0
23663.0
23722.0
59.14
0.032
23722.00
1.69
1.35

EA
22200.0
22100.0
22200.0
57.67
0.027
22166.67
0.47
0.13

EB
20080.0
20030.0
19850.0
121.02
0.062
19986.67
-1.25
-1.59

EH
17100.0
17800.0
19200.0
1069.26
0.564
18033.33
-2.79
-3.12

EL
24100.0
22840.0
23350.0
633.78
0.338
23430.00
1.46
1.12

EW
22678.0
22103.0
22488.0
292.91
0.154
22423.00
0.67
0.33

FE
21100.0
21200.0
21400.0
152.83
0.081
21233.33
-0.27
-0.61

FJ
16600.0
16400.0
16300.0
435.88
0.215
16100.00
-4.31
-4.65
X
FZ
19000.0
20000.0
20000.0
577.38
0.268
19666.67
-1.50
-1.84

• 3
0 s
No data submitted
Insufficient data
X 5
TAG SYMBOLS
Determined to be an outlier
It = Above control limit
W = Below control limit

-------
ff	








	^

CRD-LV Performance Evaluation: Tritium in Water,
8-Mar-1996

5/9
Tritium












Exper.
Rug anal

Normalized deviation

Lab
Res. 1
Res. 2
Res. 3
Sigma
(R + SR)
Average
(grand-avg)
(known) Tag
GO
21712.0
22014.0
20446.0
831.92
0.421
21390.67
-0.14
-0.48

GQ
20150.0
20050.0
20050.0
57.82
0.027
20083.33
-1.17
-1.51

HI
20487.0
20611.0
20610.0
71.09
0.033
20569.33
-0.79
-1.13

HK
21255.0
20568.0
21054.0
353.22
0.184
20959.00
-0.48
-0.82

HP
20000.0
19900.0
19800.0
100.12
0.054
19900.00
-1.32
-1.65

HR
23232.0
23523.0
23292.0
153.71
0.078
23349.00
1.40
1.06

I
IA
19728.0
19457.0
19527.0
140.59
0.073
19570.67
-1.58
-1.91

IA
IU
21330.0
22248.0
22356.0
563.77
0.275
21978.00
0.32
-0.02
¦ #
j
21481.0
21981.0
21622.0
257.74
0.134
21694.67
0.10
-0.24

JE
22708.0
22624.0
22432.0
141.45
0.074
22588.00
0.80
0.46

JK
21684.0
22836.0
21986.0
597.31
0.309
22168.67
0.47
0.13

JM
20853.0
22070.0
21504.0
609.01
0.327
21475.67
-0.08
-0.41

JN
24593.0
24486.0
24402.0
95.71
0.051
24493.67
2.30
1.96

JP
21987.0
22276.0
22230.0
155.19
0.078
22164.33
0.47
0.13

JR
19311.0
19607.0
19199.0
210.74
0.110
19372.33
-1.73
-2.07

JS
21300.0
21100.0
21500.0
199.94
0.107
21300.00
-0.22
-0.55

JY
23700.0
22600.0
22200.0
776.74
0.403
22833.33
0.99
0.65

K
20673.0
21089.0
20618.0
257.49
0.126
20793.33
-0.61
-0.95

KH
22010.0
21070.0
21544.0
469.98
0.252
21541.33
-0.03
-0.36

KM
23038.0
22316.0
21691.0
674.07
0.362
22348.33
0.61
0.27

KX
21090.0
21310.0
21010.0
155.43
0.081
21136.67
-0.34
-0.68

L
20877.0
20789.0
20581.0
152.01
0.079
20749.00
-0.65
-0.99

LE
21300.0
20500.0
21100.0
416.30
0.215
20966.67
-0.48
-0.82

LF
22000.0
22000.0
22000.0
0.00
0.000
22000.00
0.34
0.00

LR
21730.0
22240.0
22190.0
281.18
0.137
22053.33
0.38
0.04

LT
14000.0
13100.0
13550.0
449.99
0.242
13550.00
-6.32
-0.05
x ;
M
22500.0
22800.0
22800.0
173.18
0.081
22700.00
0.89
0.55

MN
19700.0
18700.0
19300.0
503.30
0.268
19233.33
-1.84
-2.18

MT









MV









N
22081.0
22057.0
22026.0
27.66
0.015
22054.67
0.38
0.04

NB
20000.0
21000.0
18000.0
1527.54
0.805
19666.67
-1.50
-1.84

NH
21995.0
21941.0
22245.0
162.17
0.082
22060.33
0.38
0.05

NJ
19980.0
20675.0
19729.0
490.03
0.254
20128.00
-1.14
-1.48

NO








•
NP
22299.0
22059.0
22266.0
129.98
0.064
22208.00
0.50
0.16

O
21526.0
21520.0
21544.0
11.75
0.006
21530.00
-0.03
-0.37

OA
20000.0
19000.0
20000.0
577.38
0.268
19666.67
-1.50
-1.84

OK
21730.0
21830.0
21040.0
430.13
0.212
21533.33
-0.03
-0.37

OM
15100.0
14900.0 -
14900.0
115.50
0.054
14966.67
-5.20
•5.54
X
OT
21700.0
21800.0
22200.0
264.56
0.134
21900.00
0.26
-0.08

OX
23156.0
22934.0
23473.0
270.93
0.145
23187.67
1.27
0.93

PB
21685.0
21956.0
21764.0
139.33
0.073
21801.67
0.18
-0.16

PE








•
• =
No data submitted

TAG SYMBOLS

fT a Above control limit
hi
$
—')
Insufficient data
x =
Determined to be an outlier
3 Below control limit J

-------
CRD-LV Performance Evaluation: Tritium in Water, 8-Mar-1996
Tritium
Lab Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known) Tae
PM
22400.0
21200.0
20800.0
832.67
0.430
21466.67
-0.08
-0.42

PQ







•
PV








•
Q
19815.0
21797.0
22787.0
1513.35
0.798
21466.33
-0.08
-0.42

QC
20252.0
18689.0
19176.0
799.80
0.420
19372.33
-1.73
-2.07

QD
21606.0
21618.0
21248.0
210.27
0.099
21490.67
-0.06
-0.40

Qi
23927.0
23310.0
22427.0
753.93
0.403
23221.33
1.30
0.96

QJ
21700.0
21300.0
21600.0
208.13
0.107
21533.33
-0.03
-0.37

QM
22891.0
21686.0
21815.0
661.63
0.324
22130.67
0.44
0.10

QP
20731.0
20943.0
21227.0
248.82
0.133
20967.00
-0.48
-0.81

QQ
26198.0
26496.0
26220.0
166.08
0.080
26304.67
3,73
3.39
X
QT
23687.0
24128.0
23613.0
278.39
0.138
23809.33
1.76
1.42

QU
21456.0
23010.0
18564.0
2256.30
1.369
21010.00
-0.44
-0.78

QW
21800.0
21172.0
20049.0
887.09
0.470
21007.00
-0.45
-0.78

QX








•
QZ
20640.0
20410.0
20130.0
255.37
0.137
20393.33
-0.93
-1.27

R
21248.0
21213.0
21518.0
166.89
0.082
21326.33
-0.19
-0.53

RB
17900.0
17200.0
18000.0
435.88
0.215
17700.00
-3.05
-3.39

RF
22752.0
23177.0
22219.0
480.04
0.257
22716.00
0.90
0.56

RH
20001.0
19669.0
23151.0
1921.67
0.935
20940.33
-0.50
-0.84

RK








•
RO
21832.0
22760.0
23008.0
619.90
0.316
22533.33
0.76
0.42

RR
20270.0
20300.0
20700.0
240.10
0.115
20423.33
-0.91
-1.24

RU
22054.0
21581.0
21617.0
263.27
0.127
21750.67
0.14
-0.20

RX
4510.0
4074.0
4634.0
294.13
0.150
4406.00
-13.52
-13.85
X
S
21923.0
21705.0
21833.0
109.60
0.059
21820.33
0.19
-0.14

sc
20088.0
20519.0
20935.0
423.54
0.227
20514.00
-0.83
-1.17

SD
21890.0
21510.0
22370.0
430.94
0.231
21923.33
0.28
-0.06

SF
21790.0
21862.0
21487.0
199.07
0.101
21713.00
0.11
-0.23

SI
20300.0
20900.0
20300.0
346.38
0.161
20500.00
-0.84
-1.18

SM
21679.0
21655.0
20114.0
896.71
0.420
21149.33
-0.33
-0.67

SN
21400.0
21104.0
21104.0
170.99
0.079
21202.67
-0.29
-0.63

SS
21100.0
20500.0
21200.0
378.57
0.188
20933.33
-0.50
-0.84

ST
21797.0
19986.0
21812.0
1049.93
0.490
21198.33
-0.30
-0.63

su
350.0
357.0
359.0
4.73
0.002
355.33
-16.70
-17.04
X
sv
23568.0
23070.0
23997.0
463.92
0.249
23545.00
1.55
1.21

sz
21853.0
22011.0
21878.0
85.10
0.042
21914.00
0.27
-0.07

T
20780.0
20809.0
20877.0
49.74
0.026
20822.00
-0.59
-0.93

TA









TC








•
TD
20100.0
16800.0
19600.0
1778.57
0.886
18833.33
-2.16
-2.49

TF
14870.0
14620.0
14930.0
164.43
0.083
14806.67
-5.33
-5.66
X
TG
25866.0
26046.0
26231.0
182.43
0.098
26047.67
3.52
3.19
X
TH








•
TL








•
• =
0 a
No data submitted
Insufficient data
x =
TAG SYMBOLS
Determined to be an outlier
ft s Above control limit
11 = Below control limit

-------
CRD-LV Performance Evaluation: Tritium in Water, 8-Mar-1996	7 / 9
Tritium
Lab Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known) Tag
TN
24003.0
23698.0
23601.0
209.72
0.108
23767.33
1.73
1.39

TO








•
TQ
19562.0
19086.0
19318.0
238.01
0.128
19322.00
-1.77
-2.11

TU
23600.0
24200.0
24200.0
346.41
0.161
24000.00
1.91
1.57

TX
16268.0
16423.0
16533.0
133.15
0.071
16408.00
4.07
-4.40
X
U
20800.0
21200.0
21600.0
400.00
0.215
21200.00
¦0.29
-0.63

UC








•
UE
20900.0
20600.0
20400.0
251.71
0.134
20633.33
-0.74
-1.08

UI








,»
UK
23300.0
22500.0
23500.0
529.13
0.268
23100.00
1.20
0.86

UN








•
uo
21008.0
21102.0
21710.0
381.07
0.188
21273.33
-0.24
-0.57

UP
21204.0
21047.0
19242.0
1090.28
0.527
20497.67
-0.85
-1.18

UT
21365.0
21223.0
21512.0
144.43
0.078
21366.67
-0.16
-0.50

UW








•
UX








•
VA
6500.0
5490.0
6520.0
15.34
0.008
5503*33
-12.65
-12.99
X
vc
21891.0
22120.0
22229.0
172.51
0.091
22080.00
0.40
0.06

VE
20192.0
21157.0
22320.0
1065.54
0.571
21223.00
-0.28
-0.61

VI
9999.0
9999.0
9999.0
1.22
0.000
9999.00
-9.11
-9.46
X.
VM
22482.0
21295.0
20937.0
808.70
0.415
21571.33
0.00
-0.34

VN
10067.0
10674.0
10301.0
306.15
0.163
10347.33
-8;84
-9.18
X
VP
25099.0
24235.0
24719.0
433.03
0.232
24684.33
2.45
2.11

VR








•
vw
23256.0
22901.0
19468.0
2092.07
1.032
21875.00
0.24
-0.10

vz
20976.0
21425.0
21875.0
449.49
0.241
21425.33
-0.12
-0.45

w
20277.0
20322.0
20427.0
77.01
0.040
20342.00
-0.97
-1.31

WD
21302.0
21404.0
21439.0
71.22
0.037
21381.67
-0.15
-0.49

WF
26200.0
26700.0
26900.0
360.58
0.188
26600.00
3;96
3.62
X
WH








•
WJ
21772.0
20957.0
21664.0
442.69
0.219
21464.33
-0.09
-0.42

WO








•
WP
22033.0
22174.0
22409.0
189.96
0.101
22205.33
0.50
0.16

WS
24100.0
23900.0
24800.0
472.56
0.242
24266.67
2.12
1.78

WT








•
X
20742.0
23040.0
20370.0
1446.15
0.717
21384.00
-0.15
-0.49

Y
21491.0
21098.0
21171.0
208.97
0.106
21253.33
-0.25
-0.59



Data sorted by Laboratory Averaf



Average
Tag
Lab
Average
Tag
Lab
Average
Tag
Lab
355.33
X
SU
9999.00
X
VI
16100.00
X
FJ
2213.33
X
BM
10347.33
X
VN
16408.00
X
TX
2219.67
X
CX
13550.00
X
LT
17700.00

RB
4406.00
X
RX
14806.67
X
TF
18033.33

EH
5503.33
X
VA
14966.67
X
OM
18833.33

TD
• = No data submitted
0 = Insufficient data
TAG SYMBOLS
x s Determined to be an outlier
IT s Above control limit
JJ- = Below control limit

-------
8/9	CRD-LV Performance Evaluation: Tritium in Water, 8-Mar-1996
Tritium
Data sorted by Laboratory Average
Average
Tag
Lab
Average
Tag
Lab
Average
Tag
Lab
19233.33

MN
21253.33

Y
22054.67

N
19322.00

TQ
21262.67

CK
22060.33

NH
19372.33

QC
21273.33

UO
22060.33

AY
19372.33

JR
21300.00

JS
22080.00

VC
19497.33

C
21311.33

D
22130.67

QM
19570.67

I
21326.33

R
22164.33

JP
19666.67

OA
21362.67

AW
22166.67

EA
19666.67

NB
21366.67

UT
22168.67

JK
19666.67

FZ
21381.67

WD
22205.33

WP
19796.67

BC
21384.00

X
22208.00

NP
19900.00

HP
21385.00

AF
22254.33

DR
19986.67

EB
21390.67

GO
22283.33

A
20000.00

CO
21425.33

VZ
22300.00

BO
20083.33

GQ
21464.33

WJ
22348.33

KM
20128.00

NJ
21466.33

Q
22423.00

EW
20342.00

W
21466.67

PM
22533.33

RO
20393.33

QZ
21475.67

JM
22588:00

JE
20423.33

RR
21490.67

QD
22700.00

M
20497.67

UP
21530.00

O
22711.67

AJ
20500.00

SI
21533.33

QJ
22716.00

RF
20514.00

sc
21533.33

OK
22819.00

BB
20569.33

m
21541.33

KH
22833.33

JY
20633.33

UE
21571.33

VM
22956.00

AE
20749.00

L
21604.00

AH
23100.00

UK
20793.33

K
21643.33

BL
23100.00

CS
20822.00

T
21666.67

AU
23187.67

OX
20865.67

AP
21694.67

J
23221.33

QI
20900.00

DI
21700.00

DT
23349.00

HR
20933.33

SS
21703.33

CE
23350.00

AK
20933.33

BG
21713.00

SF
23430.00

EL
20940.33

RH
21750.67

RU
23545.00

SV
20959.00

HK
21753.67

AZ
23722.00

E
20966.67

LE
21776.00

CG
23733.33

DH
20967.00

QP
21801.67

PB
23767.33

TN
21007.00

QW
21820.33

S
23785.00

BA
21010.00

QU
21875.00

vw
23809.33

QT
21136.67

KX
21900.00

OT
24000.00

TU
21149.33

SM
21914.00

sz
24200.00

BW
21198.33

ST
21918.33

DE
24266.67

ws
21200.00

U
21923.33

SD
24493.67

JN
21202.67

SN
21978.00

IU
24684.33

VP
21223.00

VE
22000.00

LF
26047.67
X
TG
21233.33

FE
22000.00

CJ
26304.67
X
QQ



22053.33

LR
26600.00
X
WF
• = No data submitted
0 = Insufficient data

TAG SYMBOLS
x = Determined to be an outlier
IT
U
= Above control limit
= Below control limit

-------
		V
CRD-LV Performance Evaluation: Tritium in Water, 8-Mar-1996	9 / 9
Tritium
% responding labs	Frequency distribution
10.	
jilMt

-4	-2	0	+2	+4	+6
Normalized deviation of the mean from the known value
responding labs	Frequency distribution	
10-
to

— [	—	j	-[—	— [	i	—[-
-6	-4	-2	0+2+4	+6
Normalized deviation of the mean from the grand average

-------
United States
Environmental Protection
Agency
Office of Research and
Development
Washington. DC 20460
EPA/600/R-96/0S6A
July 1996
Blind-A Performance
Evaluation Study
A Statistical Evaluation of
the April 16, 1996 Data
023RSC96 cov-086-A

-------
Blind-A
Performance Evaluation Study
April 16, 1996
Environmental Protection Agency
National Exposure Research Laboratory
Characterization Research Division
Las Vegas, Nevada

-------
UNITED STATES ENVIRONMENTAL PROTECTION AGENCY
OFFICE OF RESEARCH AND DEVELOPMENT
NATIONAL EXPOSURE RESEARCH LABORATORY
CHARACTERIZATION RESEARCH DIVISION-LAS VEGAS
P.O. BOX 93478
LAS VEGAS, NEVADA 89193-3478
(702/798-2100)
Dear Participant,
Enclosed are the results of the Analytical Sciences Branch (CRD-LV)
Performance Evaluation Study for Blind-A; April 16,1996.
The known value for each analysis was determined by gravimetric methods,
checked by chemical analyses performed by CRD-LV's Radiochemlstry Laboratory,
and compared to the participating laboratories' grand average.
The expected precision, determined by the known value, was taken from
'Table 3. Laboratory Precision: One Standard Deviation Values and Control Limits
for Various Analyses", which is based on data accumulated over the years by the
Performance Evaluation Program, and can be found in the Environmental Radioactivity
Performance Evaluation Studies Program and Radioactive Standards Distribution
Program information brochure.
Please take a few minutes to review this report and the analytical data your
laboratory submitted to us. If there are any apparent discrepancies, please notify us
immediately.
We encourage you to make use of the computer-automated data-entry system
that has been in place for some time now. As the number of participants increases,
and it becomes unrealistic for us to receive results by mail or FAX, the computer
system will be our only avenue for accepting data.
if you have any questions or comments, please send a message via the data-entry
system or contact Stephen Pia at 702/798-2102 or Patricia Honsa at 702/798-2141.
Sincerely, //
Stephen Pia
Team Leader
RADQA Program
Enclosure

-------
NOTICE
This material has been funded wholly by
the U.S. Environmental Protection Agency.
It has been subjected to the Agency's review,
and has been approved for publication as
an EPA document.

-------
CRD-LV Performance Evaluation: Blind-A, 16-Apr-1996	l / 30'
The following pages consist of separate sections for each of the nuclides in this study with four
parts per section. After the firnt. each part is flepornteH from the next by a new page or a thick
horizontal bar. The first page of each section is a statistical summary for the nuclide and starts
with a statement of the known value, the control limits, and the warning limita.
The warning limits are placed at two normalized standard deviations above and below the •
known value and the control limits are three normalized standard deviations above and below
the known value. If you keep control charts, these values will be useful for anticipating problems
with the accuracy of your analytical methods.
The coin shaped pie chart at the top of the summary page shows the fate of all the samples
sent out in number and percentage terms. The pie chart starts at the top and rotates clockwise.
The first sector represents those participants who submitted analytical results within both the
warning and control limits. The next sector represents those who are in the warning region but
not out of control. The third sector represents those who are out of control, but have passed
the outlier test. The fourth sector represents those who have failed the outlier test. The last
sector represents those participants who have failed to respond properly. This is the case if no
analytical results were returned, or lees than three determinations were reported, or if the results
were received too late. The reeding on the edge of the coin is spaced at one percent intervals, and
the sector shading becomes darker as the data reliability decreases. Sectors with zero width are
not shown.
The table in the center shows a number of statistical quantities calculated from the submitted
data based on the mean and median values in relation to the known value, both before and after
outlier removal. The lower pie chart \iae& the same construction as the upper chart and shows
the distribution of properly submitted data in terms of deviation from the known value divided
into sectors representing one, two, three, and greater than three normalized standard deviations.
The second part is an alphabetical listing, in lab-code order, of submitted data and several
calculated quantities. An entry that is shaded has been rejected because of one of the reasons
listed above or failure of the outlier test. The fifth and sixth columns sire a measure of laboratory
precision. The Range analysis is a normalized value that you may use to keep precision control
charts. The eighth and ninth columns are the differences from the mean of all non-outliers and
from the known value, respectively. If this value is between 2.0 and 3 0t your analytical process
precision is in the warning zone; if it exceeds 3.0 it is out of control. A tag symbol may appear in
the last column. Each page with tags has a symbol definition summary at the bottom. If there is
no tag symbol, the data is within the control limits, but it may be in the warning zone.
The third part is a three-column listing of result average, tag symbol, and lab-code in average
order excluding those labs not responding properly. In this order, all outliers and out-of-control
results appear at the top or bottom of the list.
The last part is two bar chart displays showing frequency distributions of responding
participants. The first chart places the known value at the center and a bar at each 0.2 unit of
expected precision. The second chart places the mean of the reported measurements at the center
anH a bar at each 0.2 unit of standard deviation. In both cases, a bar includes those results within
0.1 unit up to the maximum of six. Any results more than six units from the center value are
shown cumulatively by a shaded bar one past the sixth unit. If the central tendency of the known
value distribution falls away from the center, an error in accuracy is indicated. If the distribution
is broad, poor precision is indicated. The mean value distribution is similar but uses the average
and standard deviation of reported results as its basis.

-------
ff
2/30
CRD-LV Performance Evaluation: Blind-A, 16-Apr-1996
The Range Analysis(R + SR) is calculated from the range, mean range and standard error of
the range values. The range is the difference between the maximum and minimum	for the
laboratory. The mean range is calculated by multiplying the expected precision by 1.693(for three
results). The standard error of the range is calculated by multiplying the mean, tange by 2.515(for
three results), subtracting the mean range from this product, and dividing the result by 3. If the
range is greater than the mean range, then the range analysis is calculated by subtracting the
mean range from the range, dividing the result by the standard error of the range and adding 1.
If the mean range is greater than or equal to the range, then the range analysis is calculated by
dividing the range by the mean range.
The normalized deviation of the mean from the grand average is calculated from the deviation
of the mean from the grand average and the standard error of the mean values. The deviation of
the mean from the grand average is calculated by subtracting the grand average from the
average of the laboratory's three results. The standard error of the mean is calculated by
dividing the expected precision by the square root of 3(the number of results). The normalized
deviation of the mean from the grand average is calculated by dividing the deviation of the mean
from the grand average by the standard error of the mean.
The normalized deviation of the mean from the known value is calculated from the deviation of
the mean from the known value and the standard error of the mean values. The deviation of the
mean from the known value is calculated by subtracting the known value from the average of the
laboratory's three results. The standard error of the mean is calculated by dividing the expected
precision by the square root of 3(the number of results). The normalized deviation of the mean
from the known value is calculated by dividing the deviation of the mean from the known value by
the standard error of the mean.
A complete explanation of the statistical calculations involved in the report may be found in
the Environmental Radioactivity Performance Evaluation Studies Program information brochure
[Draft Revision of EPA-600/4-81-004J, available from Patricia Honsa, CRD-LV, 702/798-2141.

-------
CRD-LV Performance Evaluation: Blind-A, 18-Apr-1996
3/30
Gross Alpha	Statistical Summary	175 Participants
The known value of this nuclide is 74.8 pCi/1 with an expected precision of 18.7; the control limits
are 42.4 to 107.2; the warning regions are 42.4 to 53.2 and 96.4'to 107.2
Statistic		Respondents	 Non-outliers
Mean
72.87
Grand Avg 68.69
Std. Dev.
45.18
12.02
Variance
2040.80
144.45
% Coef. of Var.
62.00
17.50
% deviation of mean from known value
-2.58
-8.17
Norm. dev. of mean from known value
-0.04
-0.51
Median
69.70
69.67
% deviation of median from known value
-6.82
-6.86
Norm. dev. of median from known value
-0.11
-0.43

-------
'
4/30
CRD-LV Performance Evaluation: Blind-A, 16-Apr-1996

	1
Gross Alpha







\
Lab
Res. 1
Res. 2

Exper.
Rng anal

Normalized deviation

Res: 3
Sigma
(R + SR)
Average
(grand-avg)
(known) Tag
A
59.6
65.0
66.3
3.55
0.212
63.63
-0.47
-1.03

AE
59.9
56.9
54.8
2.56
0.161
57.20
-1.06
-1.63

AF
68.3
71.6
77.1
4.45
0.278
72.33
0.34
-0.23

AH
52.5
60.5
61.6
4.97
0.287
58.20
-0.97
-1.54

AJ
85.7
81.9
78.6
3.55
0.224
82.07
1.24
0.67

AK
70.3
73.7
76.8
3.25
0.205
73.60
0.45
-0.11

AL
84.3
72.7
72.6
6.73
0.370
76.53
0.73
0.16

AP








•
AR
68.2
64.6
77.3
6.55
0.401
70.03
0.12
-0.44

AU
79.4
77.5
77.3
1.16
0.066
78.07
0.87
0.30

AW
75.4
69.2
73.1
3.13
0.196
72.57
0.36
-0.21

AZ
98.1
84.8
79.8
9.46
0.578
87.57
1.75
1.18

BA
63.8
65.4
69.3
2.83
0.174
66.17
-0.23
-0.80

BB
70.1
71.7
70.9
0.80
0.051
70.90
0.20
-0.36

BC
65.3
66.4
66.8
0.78
0.047
66.17
-0.23
-0.80

BG
74.0
62.0
66.0
6.11
0.379
67.33
-0.13
-0.69

BH
52.8
57.0
54.0
2.16
0.133
54.60
-1.31
-1.87

BK
75.0
75.0
76.0
0.58
0.032
75.33
0.62
0.05

BL








if1
BM
70.5
75.1
74.3
2.46
0.145
73.30
0.43
-0.14

BN
72.5
71.9
72.0
0.32
0.019
72.13
0.32
-0.25

BO
67.8
66.6
62.3
2.89
0.174
65.57
-0.29
-0.86

BS
77.5
81.5
78.0
2.18
0.126
79.00
0.95
0.39

BW








•
C
66.8
65.5
65.0
0.93
0.057
65.77
-0.27
-0.84

CA
62.5
66.6
62.4
2.40
0.133
63.83
-0.45
-1.02

CE
91.6
82.6
80.7
5.82
0.344
84.97
1.51
0.94

CG
81.4
74.4
86.8
6.22
0.392
80.87
1.13
0.56

CJ
62.0
62.0
67.0
2.89
0.158
63.67
-0.47
-1.03

CK
69.8
72.8
63.5
4.75
0.294
68.70
0.00
-0.57

CM








•
CO








m ¦
cs
52.8
63.1
60.1
5.30
0.325
58.67
-0.93
-1.49

cx
82.3
85.5
73.4
6.27
0.382
80.40
1.08
0.52

D
70.6
73.3
70.1
1.72
0.101
71.33
0.24
-0.32

DB
76.0
73.0
77.0
2.08
0.126
75.33
0.62
0.05

DD
47.9
42.6
43.8
2.78
0.167
44.77
-2.22
-2.78

OE
77.8
77.9
78.0
0.10
0.006
77.90
0.85
0.29

DI








m
DO








•
DS
65.5
57.7
64.7
4.29
0.246
62.63
-0.56
-1.13

DT
67.5
65.9
67.6
0.95
0.054
67.00
-0.16
-0.72

DZ
66.5
63.5
65.2
1.50
0.095
65.07
-0.34
-0.90

E
70.5
73.2
68.1
2.55
0.161
70.60
0.18
-0.39

EB
79.2
81.0
78.3
1.37
0.085
79.50
1.00
0.44

• S
No data submitted

TAG SYMBOLS

ft a Above control limit
la-
Insufficient data
X 3
Determined to be an outlier
s Below control limit J

-------
CRD-LV Performance Evaluation: Blind-A, 16-Apr-1996	5/30
Gross Alpha
Lab
Res. 1
Bea. 2
Bee. 3
Exper.
Sigma
Rng anal
-------
CRD-LV Performance Evaluation: Blind-A, 1 A-Apr-1996
Gross Alpha
Lab
Res. 1
Res 2
Res. 3
Exper.
Rng anal

Normalized deviation
Sigma
(R + SR)
Average
(grand-avg)
(known) Tag
NH
NJ
52.7
51.1
54.9
1.91
0.120
52.90
-1.46
„ * -
-2.03
NK
67.1
59.5
67.6
4.54
0.256
64.73
-0.37
-0.93
NO
74.7
79.1
83.2
4.25
0.268
79.00
0.95
0.39
NT
116.0
113.0
110.0
3.00
0.190
113.00
4.10
3.54 x
O
71.1
67.1
73.8
3.37
0.212
70.67
0.18
-0.38
OF
55.1
57.8
58.8
191
0.117
57.23
-1.06
-1.63
OM







i
OS
80.0
78.0
78.0
1.15
0.063
78.67
0.92
0.36
OX
66.9
66.7
66.2
0.36
0.022
66.60
-0.19
-0.76
OY
90.0
90.0
85.0
2.89
0.158
88.33
1.82
1.25
P
68.3
60.8
87.6
13.83
0.847
72.23
0.33
-0.24
PA
16.4
15.4
15.4
000
0.000
15.40
-4.04
•5&0 x
PB
77.9
75.5
74.4
1.79
0.111
75.93
0.67
0.10
PG
87.9
86.7
96.3
5.23
0.303
90.30
2.00
1.44
PM
65.1
58.1
64.2
3.81
0.221
62.47
-0.58
-1.14
PQ







•
PR
67.7
68.8
63.9
2.57
0.155
66.80
-0.18
-0.74
PV
70.0
79.1
71.1
4.97
0.287
73.40
0.44
-0.13
PW








Q
55.8
59.1
59.9
2.17
0.130
58.27
-0.97
-1.53
QC







•-
QJ







•
QP
79.7
66.8
84.3
9.07
0.553
76.93
0.76
0.20
QQ
74.5
81.3
70.5
5.46
0.341
75.43
0.62
0.06
QT
73.5
66.7
67.1
3.82
0.215
69.10
0.04
-0.53
QU
87.9
85.0
79.1
4.48
0.278
64.00
1.42
0.85
QW
72.6
78.8
79.6
3.83
0.221
77.00
0.77
0.20
QX
62.3
61.1
64.8
1.89
0.117
62.73
-0.55
-1.12
QY







V '
QZ
65.3
55.4
56.5
5.43
0.313
59.07
-0.89
-1.46
RD
59.0
63.9
59.7
2.65
0.155
60.87
-0.72
-1.29
RF
62.0
54.0
57.0
4.04
0.253
57.67
-1.02
-1.59
RG
63.2
63.0
73.9
6.24
0.344
66.70
-0.18
-0.75
RI
73.7
78.9
83.4
4.85
0.306
78.67
0.92
0.36
RK
618.7
683.0
407.4
144.19
15.677
569.70
46.41
46.84 x
HP







~3
RR
130.0
180.0
180.0
0 00
0.000
180.00
10.31
9fM x
RU
48.7
53.1
51.0
2.20
0.139
50.93
-1.64
-2.21
RZ







¦»
S
79.9
78.6
87.7
4.92
0.287
82.07
1.24
0.67
sc
59.6
66.7
60.5
3.87
0.224
62.27
-0.59
-1.16
SD
57.9
72.4
64.1
7.28
0.458
64.80
-0.36
-0.93
SF
71.1
85.5
94.2
11.67
0.730
83.60
1.38
0.82
SG
42.1
43.6
45.4
1.65
0.104
43.70
-2.31
-2.88
m =
No data submitted

TAG SYMBOLS

1? 3 Above control limit
0 s Insufficient data	x s Determined to be an outlier	s Below control limit J
-------
Gross Alpha
CRD-LV Performance Evaluation: Blind-A, lS-Apr-1996
7/ SO
Lab
Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rug anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known) Tfltr
SI
79.0
78.3
82.0
1.97
0.117
79.77
1.03
0.46
SL
74.0
78.0
75.0
2.08
0.126
75.67
0.65
0.08
SM
70.2
68.1
67.1
1.58
0.098
68.47
-0.02
-0.59
SN
60.3
55.0
60.7
3.18
0.180
58.67
-0.93
-1.49
SO
67.3
69.7
72.0
2.35
0.148
69.67
0.09
-0.48
SR
60.3
56.0
61.0
2.71
0158
59.10
-0.89
-1.46
ss
68.8
68.7
72.4
2.11
0.117
69.97
0.12
-0.45
ST








ax
63.1
72.6
60.2
6.49
0.392
65.30
-0.31
-0.88
sz
68.8
53.2
59.0
7.89
0.493
60.33
-0.77
-1.34
t
60.2
64.8
66.1
3.10
0.186
63.70
-0.46
-1.03
TD







•
TG
59.5
62.1
64.5
2.50
0.158
62.03
¦0.62
-1.18
TH
70.0
69.0
65.0
2.65
0.158
68.00
¦0.06
-0.63
Hi







»
TN
68.7
62.5
70.0
4.01
0.237
67.07
¦0.15
-0.72
tq
100.0
94.4
95.9
2.90
0.177
96.77
2.60
2.03
T8
39.8
45.9
37.8
4.22
0.256
41.17
-2.55
-3.12
TY
64.3
68.6
60.5
4.05
0.256
64.47
-0.39
-0-96
U
71.3
71.7
74.2
1.57
0.092
72.40
0.34
-0.22
UA
65.0
79.0
76.0
7.37
0.442
73,33
0.43
-0.14
UE
75.1
75.7
72.8
1.53
0.092
74.53
0.54
-0.02
UK
47.7
49.4
26.3
12.87
0.730
41.13
-2.55
-3.12
UN
47.5
48.5
50.4
1.47
0.092
48.80
-1.84
-2.41
UP
56.1
60.0
60.8
2.51
0.148
58.97
-0.90
-1.47
UQ
74.7
70.1
70.2
2.63
0.145
71.67
0.28
-0.29
uw








VA
42.4
37.2
39.8
2.60

39.80
-2.68
•3.24 &
VH
63.5
68.6
72.7
4.61
0.291
68.27
-0.04
-0.61
VI
74.3
74.8
75.1
0.40
0.025
74.73
0.56
-0.01
VJ
94.0
89.1
92.4
2.50
0.155
91.83
2.14
1.58
VM







•
VO
73.0
83.1
82.9
5.77
0.319
79.67
1.02
0.45
VT








W
79.3
79.8
79.9
0.32
0.019
79.67
1.02
0.45
WE
65.8
66.5
69.5
1.97
0.117
67.27
•0.13
¦0.70
WF







»
WO
72.0
74.3
70.8
1.78
0111
72.37
0.34
-0.23
WR
73.0
75.0
78.0
2.52
0.158
75.33
0.62
0.05
X
49.5
57.3
49.5
4.50
0.246
52.10
-1.54
-2.10
Data sorted by Laboratory Average
Average	Tag	Lab Average	Tag	Lab Average
Tag
Lab
5.67
15.40
x
X
FL
PA
33.13
37.10
I
u
MY
JE
39.80
41.13
ii
VA
UK
• = No data submitted
0 s Insufficient data
TAG SYMBOLS
x = Determined to be an outlier
ft b Above control limit
Ji a Below control limit
-------
| 8/30
CRD-LV Performance Evaluation:
Btind-A, lft-Apr-1896

—	—^
Gross Alpha







¦
Average
Tag
Data sorted hy Laboratory Average


Lab
Average
Tag
Lab
Average
Tag
Lab
41.17
U
TS
64.80

SD
73.60
	 "
AK
1:3.70

SG
64.90

JY
74.27

JN
44.77

DD
65.07

DZ
74.53

UE
48.80

UN
65.30

sx
74.73

VI
48.83

FJ
65.57

BO
74.80

GZ
50.93

RU
65.77

C
75.33

WR
52.10

X
66.17

BA
75.33

DB
52.53

MV
66.17

BC
75.33

BK
52.90

NJ
66.60

OX
75.43

QQ
54.60

BH
66.70

RG
75.67

SL
55.47

I
66.80

PR
75.93

PB
56.47

JM
67.00

DT
76.33

FN
57.20

AE
67.07

TN
76.53

AL
57.23

OF
67.27

WE
76.77

JQ
57.67

RF
67.33

BG
76.93

QP
57.77

HP
68.00

TH
77.00

QW
58.20

AH
68.27

VH
77.33

N
58.27

Q
68.47

SM
77.90

DE
58.57

JS
68.70

CK
78.07

AU
58.60

ID
69.10

QT
78.67

RI
58.67

SN
69.33

LF
78.67

OS
58.67

cs
69.67

SO
79.00

NO
58.77

LL
69.70

FZ
79.00

BS
58.97

UP
69.97

ss
79.17

HK
59.03

FF
70.00

HL
79.50

EB
59.07

QZ
70.03

AR
79.67

VO
59.10

SR
70.37

LT
79.67

W
60.00

KT
70.60

E
79.77

SI
60.33

SZ
70.67

O
79.90

ER
60.87

RD
70.83

EV
80.40

CX
61.17

GT
70.90

BB
80.67

KX
62.03

TG
71.33

LR
80.87

CG
62.27

SC
71.33

D
81.27

L
62.47

PM
71.40

J
82.00

M
62.63

DS
71.67

UQ
82.07

S
62.73

QX
.72.13

BN
82.07

AJ
63.63

A
72.23

P
83.60

SF
63.67

CJ
72.33

AF
84.00

QU
63.70

T
72.37

WO
84.97

CE
63.83

CA
72.40

u
87.57

AZ
64.00

EO
72.57

AW
88.33

OY
64.47

TY
73.30

BM
89.37

MF
64.50

GQ
73.33

UA
90.30

PG
64.73

NK
73.40

PV
91.83

VJ
• s No data submitted

TAG SYMBOLS
Its
Above control limit
0 s Insufficient data
\>						

x s Determined to be an outlier
a >
Below control limit
-------
CRD-LV Performance Evaluation: Blind-A, 16-Apr-1996
9/30
Gross Alpha
Data sorted by Lahoratory Average
Average
Tag
Lab
Average
Tag
Lab
Average
Tag
Lab
96.77

TQ
104.83

KE
134.23
X
K
99.00

NA
113.00
X
NT
180.00
569.70
X
X
RR
RK
% responding labs
Frequency distribution
iof
0
I ¦ Ml

ym
-6
-4	-2	0	+2	*4
Normalized deviation of the mean from the known value
% responding labs	Frequency distribution
iof
0
, ¦¦¦!


-4	-2	0+2+4
Normalized deviation of the mean from the grand average
• s No data submitted TAG SYMBOLS ft * Above control limit
<2 s Insufficient data	x g Determined to be an outlier	 H & Below control limit
-------
CRD-LV Performance Evaluation: Blind-A, 16-Apr-1996
10/30
Radium-226	Statistical Summary	175 Participants
The known value of this nuclide La 3.0 pCi/1 with an expected precision of 0.5; the control limits
are 2.1 to 3.9; the warning regions are 2.1 to 2.4 and 3.6 to 3.9
Statistic	ReBpondenta	Non-outliere
Mean
4.80
Grand Avg 3.02
Std. Dev.
12.44
0.46
Variance
154.82
0.21
% Coef. ofVar.
258.97
15.22
% deviation of mean from known value
60.16
0.78
Norm. dev. of mean from known value
0.15
0.05
Median
3.07
3.05
% deviation of median from known value
2.22
1.67
Norm. dev. of median from known value
0.01
0.11
-------
v	~
11/30
CRD-LV Performance Evaluation: Blind-A, lft-Apr-1996

	
Radiuzn-226







\
Lab
Res. 1
Res. 2
Res. 3
Exper.
Rng anal

Normalized deviation

Sigma
(R + SR)
Average
{grand-avg)
(known) Tae
A
2.6
2.5
2.4
0.10
0.236
2.50
-1.81
-1.73

AE
3.1
3.2
3.3
0.10
0.236
3.20
0.61
0.69

AF
3.0
3.1
3.1
0.06
0.118
3.07
0.15
0.23

AH
3.0
4.8
3-7
0.91
3.146
3.83
2.81
2.89

AJ
6.0
6.6
3.0
1.63
5.846
4,87
6.39
6.47
X
AK
4.1
3,9
3.8
0.15
0.354
3.93
3.15
3.23
ft
AL
2.6
2.6
3.1
0.29
0.591
2.77
-0.89
-0.81

AP







¦0
AR








•
AU
2.7
3.4
3.1
0.35
0.827
3.07
0.15
0.23

AW
3.7
3.4
2.9
0.40
0.945
3.33
1.07
1.16

AZ
3.0
3.3
3.4
0.21
0.473
3.23
0.73
0.81

BA
2.7
3.6
3.1
0.45
1.120
3.13
0.38
0.46

BB








•
BC
3.3
3.8
3.5
0.25
0.591
3.53
1.77
1.85

BO








•
BH
2.2
3.2
3.1
0.55
1.345
2.83
'0.66
-0.58

BK
3.1
2.9
3.1
0.12
0.236
3.03
0.03
0.12

BL








*
BM
3.3
2.8
2.9
0.26
0.591
3.00
-0.08
0.00

BN
2.8
2.7
3.0
C.15
0.354
2.83
-0.66
-0.58

BO
2.9
2.5
2.5
0.23
0.473
2.63
-1.35
-1.27

BS








•
BW









C
2.7
2.9
3.1
0.20
0.473
2.90
-0.43
-0.35

CA
2.8
3.0
2.9
0.10
0.236
2.90
-0.43
-0.35

CE
3.5
3.3
3.1
0.20
0.473
3.30
0.96
1.04

CG
3.2
3.4
3.2
0.12
0.236
3.27
0.84
0.92

CJ
3.4
3.4
3.4
0.00
0.000
3.40
1.30
1.39

CK
2.6
2.6
2.4
0.12
0.236
2.53
-1.70
-1.62

CM








.+
CO








•
cs
3.0
3.0
3.2
0.12
0.236
3.07
0.15
0.23

cx








•
D








•
DB
2.6
2.8
2.5
0.15
0.354
2.63
-1.35
-1.27

DD









DE
3.4
3.4
3.5
0.06
0.118
3.43
1.42
1.50

DI








•
DO








•
DS









DT
2.9
2.6
2.8
0.15
0.354
2.77
-0.89
-0.81

DZ
3.3
3.5
3.0
0.25
0.591
3.27
0.84
0.92

E
2.9
2.6
2.7
0.15
0.354
2.73
-1.00
-0.92

EB
2.9
3.0
3.2
0.15
0.354
3.03
0.03
0.12

• =
No data submitted

TAG SYMBOLS

ft a Above control limit
10.
Insufficient data
X S
Determined to be an outlier
{!• a Below control limit
	 - ¦ ¦ — — — 		V
-------
CRD-LV Performance Evaluation: Blind-A, 16-Apr-1996
12/30
Radium-226
Lab
Ree. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR) .
Average
Normalized deviation
(grand-avg) (known) Tae
EL
3.8
3.6
3.4
0.20
0.473
3.60
2.00
2.08
EO
3.0
3.1
2.9
0.10
0.236
3.00
-0.08
0.00
ER
3.4
3.1
2.9
0.25
0.591
3.13
0.38
0.46
EV






'jk
PP







^ -
FJ








FL







:»
FN
3.0
3.6
2.9
0.38
0.827
3,17
0.50
0.58
¥Z








GI







•
GQ
3.4
3.5
3.5
0.06
0.118
3.47
1.54
1.62
GT








GZ







• '
HI







V
HK
3.1
3.1
3.2
0.06
0.118
3.13
0.38
0.46
HL
3.7
3.7
3.7
0.00
0.000
3.70
2.34
2.42
HP
4.1
3.8
3.8
0.17
0.354
3.90
3.04
3.12 IT
HX







*-
I
2.7
2.4
2.3
0.21
0.473
2.47
-1.93
-1.85
n>
2.5
2.1
1.4
0.56
1.570
2.00
-3.55
-3.46 11
j
2.8
3.1
3.0
0.15
0.354
2.97
-0.20
-0.12
JE
2.9
2.8
3.5
0.38
0.827
3.07
0.15
0.23
JG








JM







•
JN







•
JQ







•
JS
2.5
2.8
3.1
0.30
0.709
2.80
-0.77
-0.69
JY
7.2
6.8
6.6
0.31
0.709
6.87
13.31
13.39 x
K
2.7
2.6
2.6
0.06
0.118
2.63
-1.35
-1.27
ke







•
KT







•
KX







•
L
2.5
2.7
2.7
0.12
0.236
2.63
-1.35
-1.27
LE







*;
LF







ft
LL







*
Lft








LT
2.4
2.8
3.5
0.56
1.570
2.90
-0.43
-0,36
M
18.3
ISA
1T.7
0.60
1.7B6
1&3Q

6&00- ji
MF







•
MP







«
MY







•-
MY







•
N
3.1
3.1
3.0
0.06
0.118
3.07
0.15
0.23
NA







•
• a No data submitted	TAG SYMBOLS	1) s Above control limit
I 0 3 Insufficient data	x = Determined to be an outlier	11 s Below control limit
^	J)
-------
((	
13/!
V.
30
CRD-LV Performance Evaluation: Blind-A, 16-Apr-1996

	
Radium-226







	.
Lab
Res. 1
Res. 2

Exper.
Rnganal

Normalized deviation

ReS. 3
Sigma
(R + SR)
Average
(grand-avg)
(known) Tag
NH
3.6
3.6
3.3
0.17
0.354
3.50
1.65
1.73

NJ
1.7
1.8
1.8
0.06
0.118
1.77
-4.35
-4.27

NK.








?*:
NO
3.3
3.4
3.4
0.06
0.118
3.37
1.19
1.27

NT
3.0
2.9
2.9
0.06
0.118
2.93
-0.31
-0.23

Q,
5.5;
5.4

0;06
0.118
5:47
8:46
8i54
X .
OF
2.5
2.2
2.6
0.21
0.473
2.43
-2,04
-1.96

OM








#
OS








"4
OX
3.2
3.6
3.6
0.23
0.473
3.47
1.54
1.62

OY
2.9
2.5
2.7
0.20
0.473
2.70
-1.12
-1.04

P
3.4
3.0
3.2
0.20
0.473
3.20
0.61
0.69

PA








•
PB
3.5
3.4
3.6
0.10
0.236
3.50
1.65
1.73

PG
3.3
2.4
2.6
0.47
1.120
2.77
-0.89
-0.81

PM









PQ








••
PR









PV
3.0
2.6
3.3
0.35
0.827
2.97
-0.20
-0.12

PW
1.8
3.1
3.7
0.97
3.371
2.87
-0.54
-0.46

Q
4.5
4.1
4.3
0.20
0.473
4.30
4.42
4.50
1);
QC








•
QJ








>
QP









QQ
6.8
6.0
6.3
0i26
0.691
6£7
12.2?
12.36
*
QT
1.6
2.0
1.5
0.26
0.591
1.70
-4.58
-4.50
It
QU
5;7
5.5
8.0
0:25
0.591
5.73

9.47
X: -
QW








.•
QX
3.2
3.4
2.9
0.25
0.591
3.17
0.50
0.58

QY
3.0
3.1
3.0
0.06
0.118
3.03
0.03
0.12

QZ
3.0
2.9
3.1
0.10
0.236
3.00
-0.08
0.00

RD
3.3
3.2
3.0
0.15
0.354
3.17
0.50
0.58

RF
3.0
2.4
3.5
0.55
1.570
2.97
-0.20
-0.12

RO









RI









RK
X2
1,0
LI
0.10
0.236
1>10
466
£&68i

RP








¦:*s
BE









KI7
OA
OA
0;1
O.00
0.000
0.10
mm
idOff
W :
RZ








Zm
S
3.2
3.0
3.1
0.10
0.236
3.10
0.27
u.35

sc
2.5
2.4
2.6
0.10
0.236
2.50
-1.81
-1.73

SD
3.5
2.7
3.7
0.53
1.345
3.30
0.96
1.04

SF
2.8
2.9
2.7
0.10
0.236
2.80
-0.77
-0.69

8G
120.0
i26.!2
130.3
5.19
22.272
125.50
424.27
424.35
X
• =
No data submitted

TAG SYMBOLS

1T s Above control limit
0 5
^	
Insufficient data
X S
Determined to be an outlier
il a Below control limit
-------
CRD-LV Performance Evaluation: Blind-A, HkApr-1996	14/30
J-..	1 -	¦ ' " ' ¦ M ^	— ¦ - -1 - - -	¦ ¦ ¦ ¦ i . ^====-z ¦ 	
Radium-226











Lab
Res. 1




Exper.
Rag anal


Normalized deviation

Res. 2
Res. 3
Sigma
(R + SR)
Average
(grand-avg) (known) Tag
SI
10.1

13.0
13.4
1.80
6.521
12.17
31.67
31i75
X
gL










SM
3.6

3.3

3.1
0.25
0.591
3.33
1.07
1.15

8N











SO












SR











m--
98
2.7

2.3

2.7
0.23
0.473
2.57
-1.58
-1.50

8T











SX
3.5

3.3

3.6
0.15
0.354
3.47
1.54
1.62

sz
3.6

3.2

2.8
0.40
0.945
3.20
0.61
0.69

T
3.1

3.1

3.0
0.06
0.118
3.07
0.15
0.23

TD











A
TO












TH
3.9

4.1

4.5
0.31
0.709
4.17
3.96
4.04
it
TL











«
TN
2.5

2.6

3.0
0.26
0.591
2.70
-1.12
-1.04

TQ
3.0

3.5

3.3
0.25
0.591
3.27
0.84
0.92

T8
9.5

9£
11.6
1.12
3.821
10.33
2&3i


TY











m
U
2.9

2.9

3.0
0.06
0.118
2.93
-0.31
-0.23

TJA











•-
UE
4.9

5>0

6.1
aio
0.236
5.00
6.86
6.93
x |
UK











!
UN
2.4

1.7

2.3
0.38
0.827
2.13
-3.08
-3.00

UP
3.0

3.3

3.3
0.17
0.354
3.20
0.61
0.69

UQ
2.8

2.7

2.8
0.06
0.118
2.77
-0.89
-0.81

UW











p*
VA
5.2

12

70
1.10
3.696
A

11.93
urn,
m
VH
a.e

6.3

5;7
1.63
5-621
6.87
13;31
iai*

VI
2.2

2.4

2.4
0.12
0.236
2.33
-2.39
-2.31

VJ











w-
VM











S>\;:
vo












VT











k,
W
3.1

3.1

3.0
0.06
0.118
3.07
0.15
0.23

WE











«¦
WF











~
WO
7.0

5.9

92
0.57
1.570
6.37
11.58
11.66
X
WB











*"
X
2.4

2.5

2.5
0.06
0.118
2.47
-1.93
-1.85





Data sorted by Laboratory Avera(




Average

Tan

Lab
Average
Tag
Lab
Average
Tag
Lab
0.10

X

RU

1.70

QT

2.00

ID
1.10

X

RK

1.77

NJ

2.13

UN
• 3 No data submitted	TAG SYMBOLS	ft s Above control linn
(03 Insufficient data	x s Determined to be an outlier	s Below control tirr
VS——¦ i - . - ¦ ¦ ¦ — — i ¦ ¦ ¦— ¦ ' - 			 —- -	1 — ¦ . 				—
-------
fl5/30
CRD-LV Performance Evaluation:
Blind-A, 16>Apr-1996

	I1
Radium-226







Average
Data sorted by Laboratory Averag



Tag Lab
Average
Tag
Lab
Average
Tag
Lab
2.33
VI
2.97

RF
3.33

SM
2.43
OF
3.00

QZ
3.33

AW
2.47
X
3.00

EO
3.37

NO
2.47
I
3.00

BM
3.40

CJ
2.50
sc
3.03

QY
3.43

DE
2.50
A
3.03

EB
3.47

sx
2.53
CK
3.03

BK
3.47

OX
2.57
ss
3.07

W
3.47

GQ
2.63
L
3.07

T
3.50

PB
2.63
K
3.07

N
3.50

NH
2.63
DB
3.07

JE
3.53

BC
2.63
BO
3.07

CS
3.60

EL
2.70
TN
3.07

AU
3.70

HL
2.70
OY
3.07

AF
3.83

AH
2.73
E
3.10

S
3.90
ft
HP
2.77
UQ
3.13

HK
3.93
It
AK
2.77
PG
3.13

BA
4.17
ft
TH
2.77
DT
3.13

ER
4.30
ft
Q
2.77
AL
3.17

RD
4.87
X
AJ
2.80
JS
3.17

QX
5.00
X
UE
2.80
SF
3.17

FN
5.47
X
O
2.83
BN
3.20

UP
5.73
X
QU
2.83
BH
3.20

sz
6.37
X
WO
2.87
PW
3.20

p
6.47
X
VA
2.90
LT
3.20

AE
6.57
X
QQ
2.90
CA
3.23

AZ
6.87
X
VH
2.90
C
3.27

TQ
6.87
X
JY
2.93
U
3.27

DZ
10.33
X
T8
2.93
NT
3.27

CG
12.17
X
SI
2.97
PV
3.30

CE
18.30
X
M
2.97
J
3.30

SD
125.50
X
SG
% responding labs
Frequency distribution
10<
oJfl-r
JLl

li.li. ¦ ¦
¦i
4	-2	'	0	*2	+4
Normalized deviation of the mean from the known value
-r
+6
• = No data submitted	TAG SYMBOLS	IT 3 Above control limit
I 0 5 Insufficient data	x = Determined to be an outlier	11 = Below control limit
-------
CRD-LV Performance Evaluation: Blind-A, 16-Apr-1996	16 / 31
Radium-226
% reaponding laba	Frequency distribution
10-

a.
4
Normalized deviation of the mean from the grand average
-------
CRD-LV Performance Evaluation: Btind-A, lfl-Apr-1996
17/30
Radium-228	Statistical Summary	175 Participants
The known value of this nuclide is 5.0 pCi/I with an expected precision of 1.3; the control limits
are 2.7 to 7.3; the warning regions are 2.7 to 3.5 and 6.5 to 7.3
82(46.0 %) Failed to respond
. 71(40.6 %) Within all Itmhs
8(4.6 %) Outliers
6(3.4 %) Out of control
but not an outtler
Statistic
Respondents
" 8(4.8 %) In warning zone
but within control
Non-outliers
Mean
€.48
Grand Avg 5.38
Std. Dev.
5.46
1.15
Variance
29.69
1.32
% Coef. of Var.
84.12
21.34
% deviation of mean from known value
29.55
7.54
Norm. dev. of mean from known value
0.27
0.33
Median
5.43
5.33
% deviation of median from known value
B.67
6.67
Norm. dev. of median from known value
0.08
0.29
14(15.1 %) More than 3 norm. S.D,
8(8.6 %) Between 2 and 3 norm. S.D.
;4B{52.7 %! WTlhFn 1 norm. S.D-
of known value
-22(23.7 %) Between 1 and 2 norm. S.D.
-------
'30	CRD-LV Performance Evaluation: Blind-A, 16-Apr-1996
/
Radium-228
Lab
Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known) Tae
A
4.4
5.1
5.2
0.44
0.363
4.90
-0.64
-0.13

AE
4.4
4.8
4.6
0.20
0.182
4.60
-1.04
-0.53

AF
6.0
6.3
6.3
0.17
0.136
6 20
1.10
1.60

AH
6.1
5.6
6.1
29
0.227
5.93
0.74
1.24

AJ
4.0
3.6
4.2
0.31
0.273
3.93
-1.92
-1.42

AK
4.9
5.0
4.6
0.21
0.182
4.83
-0.72
-0.22

AL
5.2
5.3
5.4
0.10
0.091
5.30
-0.10
0.40

AP







<>-
AR









AU
2.3
2.6
1.8
0.40
0.363
2.23
-4.19
-3.69
Jl
AW
4.7
4.6
4.9
0.15
0.136
4.73
-0.86
-0.36

AZ
5.0
4.4
4.3
0.38
0.318
4.57
-1.08
-0.58

BA
5.5
5.6
5.7
0.10
0.091
5.60
0.30
0.80

BB









BC
5.8
5.5
5.9
0.21
0.182
5.73
0.47
0.98

BG








4
BH
4.9
5.7
6.4
0.75
0.682
5.67
0.39
0.89

BK
5.2
4.9
5.0
0.15
0.136
5.03
-0.46
0.04

BL









BM
5.3
4.9
4.8
0.26
0.227
5.00
-0.50
0.00

BN








•r
BO
7.2
6.3
6.1
0.59
0.500
6.53
1 RA
2.04

BS








•
BW








•
C
6.1
5.9
5.6
0.25
0.227
5.87
0.65
1.15

CA
4.7
4.8
4.4
0.21
0.182
4.63
-0.99
-0.49

CE
5.0
5.5
5.5
0.29
0.227
5.33
-0.06
0.44

CG
4.4
4.8
5.3
0.45
0.409
4.83
-0.72
-0.22

CJ
3.1
4.3
3.5
0.61
0.546
3.63
-2.32
-1.82

CK
6.0
4.4
3.9
1.10
0.954
4.77
-0.81
-0.31

CM








•
CO








•
cs
4.2
5.3
6.3
1.05
0.954
5.27
-0.15
0.36

cx








•
D








•
DB
5.4
5.4
6.1
0.40
0.318
5.63
0.34
0.84

DD








•
DE
4.8
4.9
5.0
0.10
0.091
4.90
-0.64
-0.13

DI-









DO








*•
DS








p.-
DT
9.8
92
10.7
0:75
0.682
9.90
6,03
653

DZ
5.7
5.4
4.7.
0.51
0.454
5.27
-0.15
0.36

E








r;#
EB
5.8
5.8
5.8
0.00
0.000
5.80
0.56
1.07

• s No data submitted	TAG SYMBOLS	It a Above control limit
[05 Insufficient data	x s Determined to be an outlier	^ a Below control limit
-------
Radium-228
CRD-LV Performance Evaluation: BHnd-A, 18-Apr-liMH)
19/30
Lab Reg. 1 Res. 2 " Res. 3
Exper.
Sigma
Rog anal
(R + SR)
Normalized deviation
Average (grand-avg) (known) Tag
EL
EO
EE
EV
FF
FJ
FL
FN
FZ
cat
w
QT
oz
HI
HK
HL
HP
I
ID
J
JE
JG
JM
JN
JQ
JS
JY
K
KS
KT
KX
L
LE
LF
LL
LE
LT
M
MF
MP
MV
MY
N
NA
5.9
5.3
6.9
18 5
5.9
5.6
5.4
6.3
6.0
3.9
5.3
1.08
0.06
0.909
0.045
5.13
5.33
4.3
iai
1.36
0.15
1.345
0.13ft
5.83
5.6
0.21
0.182
5.83
-0.32
-0.06
0.61
0.61
0.18
0,44
3.8
4.0
4.3
0.25
0.227
4.03
-1.79
-1.29
7.3
7.6
6.7
0.46
0.409
7.20
2.43
2.93
12£
12.5
124
0.00
0.000
12.60
9,4»
9:99
4.6
4.7
4.5
0.10
0.091
4.60
-1.04
-0.53
4.0
4.0
4.0
0.00
0.000
4.00
-1.83
-1.33
3.1
2.7
2.9
0.20
0.182
2.90
-3.30
-2.80
3.6
2.5
2.4
0.67
0.545
2.83
-3.39
-2.89
8.9
7.2
7.3
0.95
0.772
7.80
3.23
3.73
8.9
6.8
7.4
1.08
0.954
7.70
3.10
3.60
15.8
ltfcO
m
132
1.172
wm
¥•*££
-14174
6.7
5.2
5.9
0.75
0.682
5.93
0.74
1.24
5.9
8.2
8.0
1.27
1.086
7.37
2.65
3.15
5.5
5.2
5.5
0.17
0.136
5.40
0.03
0.53
5.4
5.8
5.2
0.31
0.273
5.47
0.12
0.62
1.11
17.7ft
1.11

sf
tr
ir
i9#-
tr
>
*
*-¦
»
• s No data submitted
0 3 Insufficient data
TAG SYMBOLS
x s Determined to be an outlier
ft a Above control limit
U s Below control limit
-------
20/30

CRD-LV Performance Evaluation: Blind-A, 1&-Apr-1996

	^
Radium-228








Lab
Res. 1
Res. 2
Res. 3
Exper.
Rng anal

Normalized deviation

Sigma
(R + SR)
Average
(grand-avg)
(known) Tae
NH
5.5
5.5
5.5
0.00
0.000
5.50
0.16
0.67

NJ
5.9
5.4
5.9
0.29
0.227
5.73
0.47
0.98

NX








NO
2.5
4.3
6.1
1.80
2.211
4.30
-1.43
-0.93
NT
4.8
5.2
5.5
0.35
0.318
5.17
-0.28
0.22

O
Oil
0.8
30
0.96
0.863
0.97
4J8
&37«
-x;
OF
3.7
4.4
5.5
0.91
0.818
4.53
-1.12
-0.62
OM








•
OS









OX
5.7
6.0
6.1
0.21
0.182
5.93
0.74
1.24

OY
5.9
5.2
5.5
0.35
0.318
5.53
0.21
0.71

P
7.4
5.8
4.6
1.40
1.518
5.93
0.74
1.24

PA








•
PB
5.3
5.2
5.4
0.10
0.091
5.30
-0.10
0.40

PG








•
PM








• '
PQ








*•1
PR









PV
2.0
2.8
6.0
2.12
2.557
3.60
-2.37
-1.87

PW
5.3
5.6
5.5
0.15
0.136
5.47
0.12
0.62

Q
5.4
4.5
4.8
0.46
0.409
4.90
-0.64
-0.13

QC









QJ









QP








*
QQ









QT
5.5
6.3
5.5
0.46
0.363
5.77
0.52
1.02

QU
6.6
7.1
6.1
0.50
0.454
6.60
1.63
2.13

QW









QX
4.8
4.6
4.6
0.12
0.091
4.67
-0.95
-0.44

QY









QZ
3.3
3.7
3.7
0.23
0.182
3.57
-2.41
-1.91

RD
6.3
6.3
6.5
0.12
0.091
6.37
1.32
1.82

RF
5.0
4.9
5.3
0.21
0.182
5.07
-0.41
0.09

RG








0
HI








~
RK
46.2
4£0;
47.4
L20
1.172
46.20
54,39
64.89
x
HP








;•
RR









RU
5.6
5.5
4.7
0.49
0.409
5.27
-0.15
0.36

RZ









S
4.7
4.4
4.6
0.15
0.136
4.57
-1.08
-0.58

sc
6.8
6.3
4.8
1.04
0.909
5.97
0.79
1.29

SD
5.7
5.5
5.9
0.20
0.182
5.70
0.43
0.93

SF
7.3
7.0
7.2
0.15
0.136
7.17
2.38
2.89

SG






.

•
• a No data submitted

TAG SYMBOLS

IT 3 Above control limit
0 s Insufficient data	x = Determined to be an outlier	U 3 Below control limit J
-------
CRD-LV Performance Evaluation: Blind-A, 16-Apr-1996
21/30
Radium-228
Lab
ReB. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
04
X;
SM
5.0
5.4
4.8
0.31
0.273
5.07
-0.41
0.09
•<
8N







•
SO








•
SR








~
ss
1.0
4.9
4.1
0.49
0.409
4.33
-1.39
-0.89

ST







%
sx
7.2
8.8
4.9
1.96
2.470
6.97
2.12
2.62

sz
7.4
3.4
5.0
2.01
2.557
5.27
-0.15
0.36

T
6.2
5.7
6.0
0.25
0.227
5.97
0.79
1.29

U>








*
TG









TH
5.4
6.3
6.3
0.52
0.409
6.00
0.83
1.33

TL








«
TN
5.8
5.3
5.6
0.25
0.227
5.57
0.25
0.75

TQ
5.8
5.5
4.9
0.46
0.409
5.40
0.03
0.53

T8
a,7
ii.i
10,6
1.25
1.172
lO.lQ

6i79

Ti







*
U
4.6
3.7
5.6
0.95
0.863
4.63
-0.99
-0.49

UA








4
UE
5.0
4.9
5.1
0.10
0.091
5.00
-0.50
0.00

UK








#
UN
5.0
14.4
7.1
4.93
7.230
8.83
4.61
5.11
ft
UP
5.4
5.5
6.0
0.32
0.273
5.63
0.34
0.84

UQ
4.9
5.1
5.2
0.15
0.136
5.07
-0.41
0.09

UW









VA
4.2
3.9
3.0
0.62
0.545
3.70
-2.23
-1.73

VH
7.6
5.7
6.8
0.95
0.863
6.70
1.76
2.26

VI
4.5
7.0
5.5
1.26
1.259
5.67
0.39
0.89

VJ








~
VM









VO








,*
VT









W
5.2
5.7
5.4
0.25
0.227
5.43
0.08
0.58

WE








*
WF








•
WO
8.9
9.4
8.6
0.40
0.363
8.97
4.78
5.28
t
WR








•
X
5.2
6.0
7.2
1.01
0.909
6.13
1.01
1.51

Average
Tag-
Data sorted by Laboratory Average
Lab Average	Tag	Lab
Average
Tag
Lab
0.97
2.23
x
O
AU
2.83
2.90
I
HP
3.57
3.60
QZ
PV
• = No data submitted
0 s Insufficient data
TAG SYMBOLS
x s Determined to be cm outlier
IT s Above control limit
(i a Below control limit
-------
22/30
CRD-LV Performance Evaluation: Blind-A, L6-Apr-199€
Radium-228
Data sorted by
Average
Tag
Lab
Average
Tag
Lab
Average
Tag
Lab
3.63

CJ
5.17

NT

5.87

C
3.70

VA
5.27

SZ

5.93

OX
3.93

AJ
5.27

RU

5.93

JS
4.00

HL
5.27

DZ

5.93

AH
4.03

FN
5.27

CS

5.93

P
4.30

NO
5.30

PB

5.97

T
4.33

ss
5.30

AL

5.97

SC
4.53

OF
5.33

EO

6.00

TH
4.57

s
5.33

CE

6.13

X
4.57

AZ
5.40

TQ

6.20

AF
4.60

HK
5.40

K

6.37

RD
4.60

AE
5.43

W

6.53

BO
4.63

U
5.47

PW

6.60

QU
4.63

CA
5.47

L

6.70

VH
4.67

QX
5.50

NH

6.97

sx
4.73

AW
5.53

OY

7.17

SF
4.77

CK
5.57

TN

7.20

FZ
4.83

CG
5.60

BA

7.37
ft
JY
4.63

AK
5.63

UP

7.70
ft
J
4.90

Q
5.63

DB

7.80
ft
ID
4.90

DE
5.61

VI

8.83
ft
UN
4.90

A
5.67

BH

8.97
ft
WO
5.00

UE
5.70

SD

9.90
X
DT
5.00

BM
5.73

NJ

10.10
X
TS
5.03

BK
5.73

BC

12.50
X
GQ
5.07

UQ
5.77

QT

16.07
X
JE
5.07

SM
5.80

EB

18.33
X
M
5.07

RF
5.83

N

31.30
X
SI
5.13

EL
5.83

LT

46.20
X
RK
% responding labs
Frequency distribution
10-
pi Im"
inf-llifl

"~r-
44
—r"
+6
-i—
-6
-r-
-4
-2	0	+2
Normalized deviation of the mean from the known value
• a No data submitted	TAG SYMBOLS	ft s Above control limit
0 s Insufficient data	x = Determined to be an outlier	W a Below control limit J
*»	- ¦	-	===y
-------
- - - -
CKD-LV Performance Evaluation: Blind-A, 16-Apr-1996	23 / 30l
Radium-228
% responding laba	Frequency distribution

-6	-4	-2	0	+2	+4
Normalized deviation of the mean from the grand average
-------
CRD-LV Performance Evaluation: Blind-A, 16-Apr-1996
24/30
Uranium (Natural)	Statistical Summary	177 Participants
The known value of this nuclide is 58.4 pCi/l with an expected precision of 5.8; the control limits
are 48.3 to 68.5; the warning regions are 48.3 to 51.7 and 65.1 to 68.5
65(36.7 %) Failed to respond,	^	; 77(43.5 %) Within all limits
6(3.4 %) Outliers 		
14(7.9 %) Out of control -
but not an outlier
Statistic
Respondents
15(8.5 %) In warning zone
but within control
Non-outliers
Mean
54.31
Grand Avg 53.55
Std. Dev.
10.42
6.19
Variance
108.56
38.36
% Coef. ofVar.
19.18
11.15
% deviation of mean from known value
-7.00
-4.89
Norm. dev. of mean from known value
-0.39
•0.46
Median
55.85
56.15
% deviation of median from known value
-4.37
-3.85
Norm. dev. of median from known value
-0.24
-0.36
20(17.9 %) More than 3 norm. S.O. \
15(13.4 %) Between 2 and 3 norm. S.D
,46(41.1 %) Within 1 norm. S.D.
%
of known value
L_L^*^31 (27.7 %) Between 1 and 2 norm. S.D.
-------
25/30
V
CRD-LV Performance Evaluation: Blind-A, 16>Apr-1996
Uranium (Natural)
Lab
Res. 1
Res. 2
Res. 3
If
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known) Tag
A
53.9
54.2
55.8
1.02
0.193
54.63
-0.27
-1.12
AE
61.2
63.7
62.7
1-26
0.255
62.53
2.09
1.23
AF
56.8
60.5
57.8
1.91
0.377
58.37
0.84
-0.01
AH
56.9
55.7
56.4
0.60
0.122
56.33
0.24
-0.62
AJ
73.2
74.0
74.0
0.46
0.081
73.73
5.43
4.58
AK
63.2
63.0
65.0
1.10
0.204
63.73
2.45
1.59
AL
51.2
57.3
64.3
6.56
1.636
57.60
0.61
-0.24
AP







•
AE
40.9
41.8
42.9
1.00
0.204
41.87
-4.08
-4.94 U
AU







«
AW
59.5
59.9
61.6
1.12
0.214
60.33
1.43
0 58
AZ
57.4
58.1
58.1
0.40
0.071
57.87
0.69
-0.16
BA
55.5
57.3
52.8
2.26
0.458
55120
-0.10
-0.96
BB
53.9
50.8
54.1
1.85
0.336
52.93
-0.78
-1.63
BC
55.5
55.2
55.6
0.21
0.041
55.43
-0.03
-0.89
BG
52.0
50.1
50.7
0.97
0.193
50.93
-1.38
-2.23
BG
52.6
51.0
49.8
1.40
0.285
51.13
-1.32
-2.17
BG
59.9
51.3
49.4
5.59
1.132
53.53
-0.60
-1.45
BH
68.3
67.7
73.9
3.42
0.631
69.97
4.31
3.45 ft
BK
55.6
58.4
57.0
1.40
0.285
57.00
0.43
-0.42
BL







•
BM
57.8
59.7
56.7
1.52
0.306
58.07
0.75
-0.10
BN
50.6
57.3
51.1
3.73
0.682
53.00
-0.76
-1.61
BO
54.6
52.6
53.7
1.00
0.204
53.63
-0.57
-1.42
BS







•
BW







•
C
56.5
55.9
55.3
0.60
0.122
55.90
0.11
-0.75
CA
57.5
58.4
57.8
0.46
0.092
57.90
0.70
-0.15
CE
59.6
55.7
57.0
1.99
0.397
57.43
0.56
-0.29
CG
51.9
53.1
51.7
0.76
0.143
52.23
-0.99
-1.84
CJ
52.0
53.0
52.0
0.58
0.102
52.33
-0.96
-1.81
CK
58.5
49.5
54.4
4.51
0.917
54.13
-0.42
-1.27
CM







•
CO







•
CS
56.7
55.7
56.5
0.53
0.102
56.30
0.23
-0.63
CX
62.9
63.2
62.7
0.25
0.051
62.93
2.21
1.35
D
57.4
53.9
53.3
2.21
0.418
54.87
-0.20
-1.06
DB
50.7
45.0
50.6
3.26
0.580
48.77
-2.02
-2.88
DD








DE
65.6
65.7
65.8
0.10
0.020
65.70
3.03
2.18
DI
61.3
58.8
60.4
1.27
0.255
60.17
1.38
0.53
DO
55.0
57.4
56.8
1.25
0.244
56.40
0.26
-0.60
DS







*
DT
60.0
65.8
59.6
3.47
0.631
61.80
1.87
1.02
DZ
49.3
50.0
53.1
2.02
0.387
50.80
-1.42
-2.27
• 9 No data submitted	TAG SYMBOLS	a Above control limit
0 = Insufficient data	x = Determined to be an outlier	U a Below control limit
-------
CRD-LV Performance Evaluation: Blind-A, 16-Apr-1996
Uranium (Natural)
Lab Res. 1 Res. 2
Res. 3
Exper.
Sigma
Rng anal
fR + SR)
Average
Normalized deviation
(rrand-avff) (known) Tae
E
58.8
58.0
58.5
0.40
0.081
58.43
0.86
0.01

EB
54.6
54.4
53.3
0.70
0.132
54.10
-0.43
-1.28

EL
57.0
55.0
54.4
1.36
0.265
55.47
-0.02
-0.88

SO







.a
ER
54.8
55.6
55.1
0.40
0.081
55.17
-0.11
-0.97

EV








FF








w.
FJ
25.5
26|S;
2S.4
1*21
0.214
24.60
-9*18
*10.03
•Wt
FL








•
FN
55.1
54.4
53.6
0.75
0.153
54.37
-0.35
-1.20
FZ
62.2
66.1
60.5
2.87
0.570
62.93
2.21
1.35

GI







•
GQ
53.7
53.9
53.5
0.20
0.041
53.70
-0.55
-1.40

GT







*
GZ









HI









HK
55.4
56.8
57.7
1.16
0.234
56.63
0.32
-0.53

HL
52.9
52.9
52.9
0.02
0.000
52.90
-0.79
-1.64

HP
HK
64.2
63.0
63.4
0.61
0.122
63.53
2.39
1.53

I
47.9
57.9
59.3
6.22
1.307
55.03
-0.15
-1.01
•
ED
55.4
54.6
57.4
1.44
0.285
55.80
0.08
-0.78

J
58.0
58.4
56.9
0.78
0.153
57.77
0.66
-0.19

JE
59.6
53.9
54.5
3.13
0.580
56.00
0.14
-0.72

JG








•
JM








•
JN
16.8
19.7
28.7
6.21
1.404
2L73
*1040
•10*95
X
JQ








•
JS
59.2
59.2
59.2
0.02
0.000
59.20
1.09
0.24

JY
40.0
39.0
44.7
3.04
0.580
41.23
-4.27
-5.13
9.
K
56.4
60.4
60.2
2.25
0.407
59.00
1.03
0.18

KE








m
KT
38.0
42.0
44.0
3.06
0.611
41.33
-4.24
-5.10

KX









L
64.1
70.6
66.5
3.29
0.662
67.07
3.44
2.59

LE









LF









LL








*
La









LT
52.5
60.3
42.2
9.08
2.606
51.67
-1.16
-2.01

M
12.5
12.6
12.6
0.06
0.010
1257
42.83
•13,69

MF








'•v.
MP








•
MV








•
MY








•
• s No data submitted
L 0 a Insufficient data
TAG SYMBOLS
x s Determined to be an outlier
1t a Above control limit
a Below control limit
-------
2'' 30	CRD-LV Performance Evaluation: Blind-A, 16-Apr*1996
Uranium (Natural)
I-L 1 do r. o Exper. Rng anal	Normalized deviation
—	Rea. 1 Res. 2 Res. 3 Sigma (R + SR) Average (grand-avg) (known) Tag
N	57.6 59.9 57.5 1.36 0.244	an n a? n nn
IN
57.6
59.9
57.5
1.36
0.244
58.33
0.83
-0.02

NA
62.0
61.0
62.0
0.58
0.102
61.67
1.83
0.98

NH
65.9
59.2
59.4
3.81
0.682
61.50
1.78
0.93

NJ
68.0
70.0
62.0
4.16
0.815
66.67
3.32
2.47

NK
59.2
56.6
57.9
1.30
0.265
57.90
0.70
-0.15

NO
66.0
67.0
68.0
1.00
0.204
67.00
3.42
2.57

NT
56.0
59.4
62.7
3.35
0.682
59.37
1.14
0.29

0








OF









OM
53.0
54.0
54.0
0.58
0.102
53.67
-0.56
-1.41

OS
52.2
56.5
55.1
2.19
0.438
54.60
-0.28
-1.13

OX








'•
OY
45.1
46.0
46.0
U.5J4
0.092
45.70
-2.94
-3.79
JJ
P
93,2
92.3
90.1
3.69
0.633
94.87
11.74
10.89
X
PA









PB
65.7
64.8
65.5
0.47
0.092
65.33
2.92
2.07

PG
60.6
55.6
59.3
2.59
0.509
58.50
0.88
0.03

PM








»
PQ









PB








w
PV
49.4
50.8
48.0
1.40
0.285
49.40
-1.84
-2.69

PW
40.0
43.4
40.4
1.86
0.346
41.27
-4.26
-5.12
U
Q
49.7
52.7
55.7
3.00
0.611
52.70
-0.85
-1.70

QC








«
QJ








•
QP








•
QQ
51.7
52.4
50.6
0.91
0.183
51.57
-1.19
-2.04

QT








•
QU
40.0
39.7
40.3
0.30
0.061
40.00
-4.64
-5.49

QW








•
QX
8.6
8.5
9.3
0.44
0.081
8.80
-13*90
-14.81
X
QY
57.9
57.8
57.6
0.15
0.031
57.77
0.66
-0.19

QZ
48.1
48.3
48.5
0.20
0.041
48.30
-2.16
-3.02
a
RD
56.9
56.6
56.7
0.15
0.031
56.73
0.35
-0.50

RF
59.5
57.6
61.0
1.70
0.346
59.37
1.14
0.29

RG
57.2
56.8
57.6
0.40
0.081
57.20
0.49
-0.36

RI








~
RK
50.1
54.7
51.7
2.34
0.468
52.17
-1.01
-1.86

RP
57.8
58.5
59.3
0.75
0.153
58.53
0.89
0.04

RR
56.0
59.0
56.0
1.73
0.306
57.00
0.43
-0.42

RU
43.2
47.6
46.3
2.26
0.448
45.70
-2.94
-3-79
a
KZ








*
S
42.1
42.9
47.9.
3.14
0.591
44.30
-3.36
-4.21
u
sc
57.4
57.2
55.7
0.93
0.173
56.77
0.36
-0.49

SD
50.6
51.2
51.9
0.65
0.132
51.23
-1.29
-2.14

• = No data submitted	TAG SYMBOLS	It — Above control limit
0 = Ina"fficient data	x = Determined to be an outlier		j^ajelowcontrol limit
-------
CRD-LV Performance Evaluation: Blind-A, 16-Apr-1996
Uranium (Natural)
Lab Res. 1 Res. 2
Res. 3
Exper.
Sigma
Rag anal
(R + SR)
Average
Normalized deviation
(grand-avr) (known} Tasr
SF
57.0
55.0
57.0
1.15
0.204
56.33
0.24
-0.62
SO







0
SI
57 M
60.7
60.1
1.47
0.285
59.57
1.20
0.35
SL
52.0
53.0
54.0
1.00
0.204
53.00
-0.76
-1.61
SM
55.8
57.7
56.1
1.02
0.193
56.53
0.29
•0.56
SN








SO
BR
57.2
56.3
59.3
1.05
0.214
58.27
0.81
-0.04
ss
62.4
65.1
63.9
1.35
0.275
63.80
2.47
1.61
ST








ex







• -
SZ
51.0
54.6
54.6
2.08
0.367
53.40
-0.64
-1.49
T
63.0
59.9
56.2
340
0693
59.70
1.24
0.39
TD







TO







it;
TH








it







'¦
TPf








TQ
54.0
53.7
54.6
0.46
0.092
54.10
-0.43
-1.28
TS
44.6
46.6
42.6
2 00
0407
44.60
-3 27
-4.12 ft
TIT







•
U
59.3
68.4
56.2
1.5S
0.S16
57«H
0.72
-0.13
UA







•
UE
56.2
56.7
56.7
0.29
0.051
56.63
0.29
-0.56
UK







•
UN
53.3
58.9
51.0
4.06
0.805
54.40
-0.34
-1.19
UP
37.6
38.7
45.0
3.99
0.754
40.43
-4.61
-5.37 ft
UQ







9
uw







•
VA
44,4
52.9
48.7
4.25
0.866
48.67
-2 06
-2.91
VH
3L9

36.3
2,39
0.468
32.63
¦6,64
,7.69 x
VI
56.2
5B.1
52.8
1.73
0.346
54.70
-0.25
-1.10
VJ







•=
VM







•
VO
59,1
60.7
57.0
1.86
0.377
58.93
101
0.16
vr







*
w
53.5
56.9
51.3
2.62
0.570
53.90
•0.49
-1.34
ws







,*
WF







•.
WO
54.5
51.3
48.5
3.00
0.611
51.43
-1.23
-2.08
WR
55.0
56.0
58.0
1.53
0.306
56.33
0.24
-0.62
X
46.1
49.5
48.9
1.81
0.346
48.17
-2.20
-3.06 ft
• a No data submitted
0 a Insufficient data
TAG SYMBOLS
x s Determined to be an outlier
ft s Above control limit
& s Below control limit
-------
29/30
CRD-LV Performance Evaluation: Blind-A, 16-Apr-1996
Uranium (Natural)
Data sorted
Average
Tag
Lab
Average
Tag
Lab
Average
Tag
Lab
8.80
X
QX
53.63

BO
57.77

J
12.57
X
M
53.67

OM
57.87

AZ
21.73
X
JN
53.70

GQ
57.90

NK
24.80
X
FJ
53.90

W
57.90

CA
32.63
X
VH
54.10

TQ
57.97

U
40.00
a
QU
54.10

EB
58.07

BM
40.43
u
UP
54.13

CK
58.27

SO
41.23
u
JY
54.37

FN
58.33

N
41.27
u
PW
54.40

UN
58.37

AF
41.33
u
KT
54.60

OS
58.43

E
41.87
u
AR
54.63

A
58.50

PG
44.30
n
S
54.70

VI
58.53

RP
44.60
u
TS
54.87

D
58.93

VO
46.70

RU
55.03

I
59.00

K
45.70
u
OY
55.17

ER
59.20

JS
48.17
n
X
55.20

BA
59.37

RF
48.30
u
QZ
55.43

BC
59.37

NT
48.67

VA
55.47

EL
59.57

SI
48.77

DB
55.80

ID
59.70

T
49.40

PV
55.90

C
60.17

DI
50.80

DZ
56.00

JE
60.33

AW
50.93

BG
53.30

CS
61.50

NH
51.13

BG
56.33

WR
61.67

NA
51.23

SD
56.33

SF
61.80

DT
51.43

WO
56.33

AH
62.53

AE
51.57

QQ
56.40

DO
62.93

FZ
51.67

LT
56.53

UE
62.93

CX
52.17

RK
56.53

SM
63.53

HP
52.23

CG
56.63

HK
63.73

AK
52.33

CJ
56.73

RD
63.80

SS
52.70

Q
56.77

SC
65.33

. PB
52.90

HL
57.00

RR
65.70

DE
52.93

BB
57.00

BK
66.67

NJ
53.00

SL
57.20

RG
67.00

NO
53.00

BN
57.43

CE
67.07

L
53.40

SZ
57.60

AL
69.97
ft
BH
53.53

BG
57.77

QY
73.73
94.87
It
X
AJ
P
• = No data submitted	TAG SYMBOLS	It a Above control limit
0 = Insufficient data	x a Determined to be an outlier	U a Below control limit
-------
CRD-LV Performance Evaluation: Blind-A, 16-Apr-1996	30/30
Uranium (Natural)
% responding labs	Frequency distribution
L,	Uf	tLyM	f—	T—-
Normalized deviation of the mean from the known value
% responding labs	Frequency distribution	
-T-
+4
10«
lt. , I By	B|"	¦ ly»I	
-6	-4	-2	0	+2
+4
Normalized deviation of the mean from the grand average
-------
United States	Office of Research and	EPA/600/R-96/086B
Environmental Protection	Development	July 1996
Agency	Washington, DC 20460
Blind-B Performance
Evaluation Study
A Statistical Evaluation of
the April 16, 1996 Data
023RSL96 oov-0868
-------
Blind-B
Performance Evaluation Study
April 16, 1996
Environmental Protection Agency
National Exposure Research Laboratory
Characterization Research Division
Las Vegas, Nevada
-------
\y
UNITED STATES ENVIRONMENTAL PROTECTION AGENCY
OFFICE OF RESEARCH AND DEVELOPMENT
NATIONAL EXPOSURE RESEARCH LABORATORY
CHARACTERIZATION RESEARCH DIVISION-LAS VEGAS
P.O. BOX 93478
LAS VEGAS, NEVADA 89193-3478
(702/798-2100)
Dear Participant,
Enclosed are the results of the Analytical Sciences Branch (CRD-LV)
Performance Evaluation Study for Blind-B; April 16, 1996.
The known value for each analysis was determined by gravimetric methods,
checked by chemical analyses performed by CRD-LV's Radiochemistry Laboratory,
and compared to the participating laboratories' grand average.
The expected precision, determined by the known value, was taken from
'Table 3. Laboratory Precision: One Standard Deviation Values and Control Limits
for Various Analyses", which is based on data accumulated over the years by the
Performance Evaluation Program, and can be found in the Environmental Radioactivity
Performance Evaluation Studies Program and Radioactive Standards Distribution
Program information brochure.
Please take a few minutes to review this report and the analytical data your
laboratory submitted to us. If there are any apparent discrepancies, please notify us
immediately.
We encourage you to make use of the computer-automated data-entry system
that has been in place for some time now. As the number of participants increases,
and it becomes unrealistic for us to receive results by mail or FAX, the computer
system will be our only avenue for accepting data.
If you have any questions or comments, please send a message via the data-entry
system or contact Stephen Pia at 702/798-2102 or Patricia Honsa at 702/798-2141.
Sincerely,
Stephen Pia
Team Leader
RADQA Program
Enclosure
-------
NOTICE
This material has been funded wholly by
the U.S. Environmental Protection Agency.
It has been subjected to the Agency's review,
and has been approved for publication as
an EPA document.
-------
/?=
CRD-LV Performance Evaluation: Blind-B, 16-Apr-1996
1/43
The following pages consist of separate sections for each of the nuclides in this study with four
parts per section. After the first, each part is separated from the next by a new page or a thick
horizontal bar. The first page of each section is a statistical summary for the nuclide and starts
with a statement of the known value, the control limits, and the warning limits.
The warning limits are placed at two normalized standard deviations above and below the
known value and the control limits are three normalized standard deviations above and below
the known value. If you keep control charts, these values will be useful for anticipating problems
with the accuracy of your analytical methods.
The coin shaped pie chart at the top of the summary page shows the fate of all the samples
sent out in number and percentage terms. The pie chart starts at the top and rotates clockwise.
The first sector represents those participants who submitted analytical results within both the
warning and control limits. The next sector represents those who are in the warning region but
not out of control. The third sector represents those who are out of control, but have passed
the outlier test. The fourth sector represents those who have failed the outlier test. The last
sector represents those participants who have failed to respond properly. This is the case if no
analytical results were returned, or less than three determinations were reported, or if the results
were received too late. The reeding on the edge of the coin is spaced at one percent intervals, and
the sector shading becomes darker as the data reliability decreases. Sectors with zero width are
not shown.
The table in the center shows a number of statistical quantities calculated from the submitted
data based on the mean and median values in relation to the known value, both before and after
outlier removal. The lower pie chart uses the same construction as the upper chart and shows
the distribution of properly submitted data in terms of deviation from the known value divided
into sectors representing one, two, three, and greater than three normalized standard deviations.
The second part is an alphabetical listing, in lab-code order, of submitted data and several
calculated quantities. An entry that is shaded has been rejected because of one of the reasons
listed above or failure of the outlier test. The fifth and sixth columns are a measure of laboratory
precision. The Range analysis is a normalized value that you may use to keep precision control
charts. The eighth and ninth columns are the differences from the mean of all non-outliers and
from the known value, respectively. If this value is between 2.0 and 3.0, your analytical process
precision is in the warning zone; if it exceeds 3.0 it is out of control. A tag symbol may appear in
the last column. Each page with tags has a symbol definition summary at the bottom. If there is
no tag symbol, the data is within the control limits, but it may be in the warning zone.
The third part is a three-column listing of result average, tag symbol, and lab-code in average
order excluding those labs not responding properly. In this order, all outliers and out-of-conirol
results appear at the top or bottom of the list.
The last part is two bar chart displays showing frequency distributions of responding
participants. The first chart places the known value at the center and a bar at each 0.2 unit of
expected precision. The second chart places the mean of the reported measurements at the center
and a bar at each 0.2 unit of standard deviation. In both cases, a bar includes those results within
0.1 unit up to the maximum of six. Any results more than six units from the center value are
shown cumulatively by a shaded bar one past the sixth unit. If the central tendency of the known
value distribution falls away from the center, an error in accuracy is indicated. If the distribution
is broad, poor precision is indicated. The mean value distribution is similar but uses the average
and standard deviation of reported results as its basis.
-------
2/43	CRD-LV Performance Evaluation: Blind'B, 16-Apr-1996
The Range Analysis{R + SR) is calculated from the range, mean range and standard error of
the range values. The rRnge is the difference between the maximum and minimum results for the
laboratory. The mean range is calculated by multiplying the expected precision by 1.693(for three
results). The standard error of the range is calculated by multiplying the mean range by 2.575(for
three results), subtracting the mean range from this product, and dividing the result by 3. If the
range is greater than the mean range, then the range analysis is calculated by subtracting the
mean range from the range, dividing the result by the standard error of the range and adding 1,
If the mean range is greater than or equal to the range, then the range analysis is calculated by
dividing the range by the mean range.
The normalized deviation of the mean from the grand average is calculated from the deviation
of the mean from the grand average and the standard error of the mean values. The deviation of
the mean from the grand average is calculated by subtracting the grand average from the
average of the laboratory's three results. The standard error of the mean is calculated by
dividing the expected precision by the square root of 3(the number of results). The normalized
deviation of the mean from the grand average is calculated by dividing the deviation of the mean
from the grand average by the standard error of the mean.
The normalized deviation of the mean from the known value is calculated from the deviation of
the mean from the known value and the standard error of the mean values. The deviation of the
mean from the known value is calculated by subtracting the known value from the average of the
laboratory's three results. The standard error of the mean is calculated by dividing the expected
precision by the square root of 3(the number of results). The normalized deviation of the mean
from the known value is calculated by dividing the deviation of the mean from the known value by
the standard error of the mean.
A complete explanation of the statistical calculations involved in the report may be found in
the Environmental Radioactivity Performance Evaluation Studies Program information brochure
[Draft Revision of EPA-600/4-81*004], available from Patricia Honsa, CRD-LV, 702/798-2141.
-------
CRD-LV Performance Evaluation: Blind-B, 16-Apr-1998
	
3/43
Gross Beta	Statistical Summary	175 Participants
The known value of this nuclide is 166.9 pCi/1 with an expected precision of 25.0; the control limits
are 123.5 to 210.3; the warning regions are 123.5 to 138.0 and 195.8 to 210.3
27(15.4 %) Failed to respond
; 126(72.0 %) Within all limits
4(2.3 %) Outliers •' / \K
26

5(2.9 %) Out of control •

13(7.4 %) In warning zone
but not an outlier ^^CTT~T~-r-^

but within control
I ¦
i

Statistic
Respondents
Non-outliers
Mean
158.54
Grand Avg 158.64
Std. Dev.
23.35
17.25
Variance
545.34
297.58
% Coef. of Var.
14.73
10.87
% deviation of mean from known value
-5.01
-4.95
Norm. dev. of mean from known value
-0.36
-0.48
Median
156.67
156.67
% deviation of median from known value
-6.13
-6.13
Norm. dev. of median from known value
-0.44
-0.59
9(6.1 %) More than 3 norm. S.D.
13(8.8 %) Between 2 and 3 norm. S.D.
; 83(56.1 %) Within 1 norm. S.D.
of known value
43(29.1 %) Between 1 and 2 norm. S.D.
-------
/,=
4/43
CRD-LV Performance Evaluation: Blind-B, 16-Apr-1996
		
Gross Beta






\
Lab
Res. 1
Res. 2
Res. 3
Exper.
Rng anal

Normalized deviation
Sigma
(R + SR)
Average
(grand-avg)
(known) Tag
A
150.0
158.9
161.1
5.88
0.262
156.67
-0.14
-0.71
AE
125.7
128.3
128.0
1.42
0.061
127.33
-2.17
-2.74
AF
170.8
169.7
164.2
3.54
0.156
168.23
0.66
0.09
AH
177.0
174.0
187.0
6.81
0.307
179.33
1.43
0.86
AJ
136.2
133.1
138.5
3.03
0.128
136.60
-1.53
-2.10
AK
154.5
151.5
156.0
2.29
0.106
154.00
-0.32
-0.89
AL
161.4
159.9
151.4
5.39
0.236
157.57
-0.07
-0.65
AP
160.8
160.8
145.7
8.72
0.357
155.77
-0.20
-0.77
AR
135.0
144.0
140.0
4.51
0.213
139.67
-1.31
-1.89
AU
153.7
149.9
150.2
2.11
0.090
151.27
-0.51
-1.08
AW
169.6
163.8
165.1
3.04
0.137
166.17
0.52
-0.05
AZ
127.0
143.0
140.0
8.50
0.378
136.67
-1.52
-2.09
BA
167.1
169.2
166.1
1.58
0.073
167.47
0.61
0.04
BB
148.9
160.5
154.7
5.80
0.274
154.70
-0.27
-0.85
BC
159.8
158.9
159.9
0.55
0.024
159.53
0.06
-0.51
BG
178.0
167.0
110.0
36.50
2.155
151.67
-0.48
-1.06
BH
153.7
148.2
148.2
3.17
0.13Q
150.03
-0.60
-1.17
BK
184.0
187.0
180.0
3.51
0.165
183.67
1.73
1.16
BL







• ¦
BM
168.7
169.9
172.1
1.72
0.080
170.23
0.80
0.23
BN
149.8
149.3
148.4
0.71
0.033
149.17
-0.66
-1.23
BO
153.3
150.8
154.4
1.84
0.085
152.83
-0.40
-0.97
BS
178.5
176.0
173.8
2.35
0.111
176.10
1.21
0.64
BW
115.0
130.0
117.0
8.14
0.354
120.67
-2.63
-3.20 U
C
158.2
161.6
164.1
2.96
0.139
161.30
0.18
-0.39
CA
147.7
155.7
161.2
6.79
0.319
154.87
-0.26
-0.83
CE
155.5
161.9
151.7
5.15
0.241
156.37
-0.16
-0.73
CG
167.5
161.6
154.5
6.51
0.307
161.20
0.18
-0.39
CJ
160.0
160.0
160.0
0.00
0.000
160.00
0.09
-0.48
CK
153.0
159.0
160.0
3.79
0.165
157.33
-0.09
-0.66
CM








CO







«
CS
147.0
153.0
165.0
9.17
0.425
155 00
-0.25
-0.82
CX
158.3
157.6
143.3
8.47
0.354
153.07
-0.39
-0.96
D
170.7
147.7
166.2
12.19
0.543
161.53
0.20
-0.37
DB
168.0
168.0
165.0
1.73
0.071
167.00
0.58
0.01
DD
150.0
146.6
149.3
1.80
0.080
148.63
-0.69
-1.27
DE
146.2
146.4
146.8
0.30
0.014
146.47
-0.84
-1.42
DI







V
DO








DS
151.0
149.0
146.0
2.52
0.118
148.67
-0.69
-1.26
DT
176.0
175.0
176.0
0.58
0.024
175.67
1.18
0.61
DZ
130.1
139.8
125.7
7.21
0.333
131.87
-1.85
-2.43
E
167.2
169.4
163.2
3.14
0.146
166.60
0.55
-0.02
EB
170.5
167.5
168.6
1.52
0.071
168.87
0.71
0.14
0 =
No data submitted

TAG SYMBOLS

It = Above control limit
10-
Insufficient data
x =
Determined to be an outlier
H a Below control limit
					'J
-------
CRD-LV Performance Evaluation: Blind-B, 18-Apr-1996	5 / 43
Gross Beta
Lab Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
>
Normalized deviation
(grand-avg) (known) Tag
EL








- •
EO
167.0
162.0
162.0
2.89
0.118
163.67
0.35
-0.22

ER







«
EV
178.1
169.1
176.0
4.71
0.213
174.40
1.09
0.52

FF
159.1
156.6
163.2
3.33
0.156
159.63
0.07
-0.50

FJ
174.3
172.1
166.8
3.86
0.177
171.07
0.86
0.29

FL
143.0
160.0
154.0
8.62
0.402
152.33
-0.44
-1.01

FN
150.0
151.0
150.0
0.58
0.024
150.33
-0.58
-1.15

FZ
154.3
156.0
156.7
1.23
0.057
155.67
-0.21
-0.78

GI








•
GQ
147.0
146,0
149.0
1.53
0.071
147.33
-0.78
-1.36

GT
138.5
145.9
148.3
5.11
0.232
144.23
-1.00
-1.57

GZ
173.7
180.9
169.7
5.68
0.265
174.77
1.12
0.55

HI








•
HK
171.9
172.4
175.8
2.12
0.092
173.37
1.02
0.45

HL
154.9
154.9
154.9
0.02
0.000
154.90
-0.26
-0.83

HP
Hx
155.0
162.0
147.0
7.51
0.354
154.67
-0.28
-0.85
•
I
152.8
158.7
153.6
3.20
0.139
155.03
-0.25
-0.82
ID
139.9
137.3
109.2
17.02
0.725
128.80
-2.07
-2.64

J
164.9
162.2
162.0
1.62
0.069
163.03
0.30
-0.27

JE
154.4
153.3
159.0
3.02
0.135
155.57
-0.21
-0.79

JG
194.3
190.3
191.2
2.10
0.095
191.93
2.31
1.73

JM
115.5
127.1
116.3
6.48
0.274
119.63
-2.70
-3.27

JN
121.0
129.4
122.9
4.41
0.198
124.43
-2.37
-2.94

JQ
210.1
216.0
193.7
11.55
0.527
206.60
3.32
2.75

JS
187.3
175.0
181.2
6.15
0.291
181.17
1.56
0.99

JY
152.0
152.0
148.0
2.31
0.095
150.67
-0.55
-1.12

K
226;8
23011
212.7
9.24
0.411
223.20
4.47
3*90
X
KE
151.8
149.9
151.4
1.00
0.045
151.03
-0.53
-1.10

KT
195.0
200.0
205.0
5.00
0.236
200.00
2.87
2.29

KX
179.0
168.0
172.0
5.57
0.260
173.00
1.00
0.42

L
169.8
156.1
172.6
8.83
0.390
166.17
0.52
-0.05

LE








•
LF
160.0
150.0
160.0
5.77
0.236
156.67
-0.14
-0.71

LL
148.9
151.4
140.5
5.71
0.258
146.93
-0.81
-1.38

LR
156.0
155.0
185.0
17.04
0.709
165.33
0.46
-0.11

LT
199.0
179.0
191.0
10.07
0.473
189.67
2.15
1.58

M
159.0
165.0
160.0
3.21
0.142
161.33
0.19
-0.39

MF
139.0
139.0
139.0
0.00
0.000
139.00
-1.36
-1.93

MP








•
MV
156.5
153.0
152.4
2.21
0.097
153.97
-0.32
-0.90

MY
120.5
li 7.6
118.3
1.51
0.069
118.80
-2.76
-3.33
U
N
167.3
164.5
169.0
2.27
0.106
166.93
0.57
0.00

NA
195.0
190.0
200.0
5.00
0.236
195.00
2.52
1.95

• 3
[0m
No data submitted
Insufficient data
x =
TAG SYMBOLS
Determined to be an outlier
ft s Above control limit
it a Below control limit
-------
f 6/43
CRD-LV Performance Evaluation: Blind-Bt 16-Apr-1996

		
Gross Beta








Lab
Res. 1
Res. 2

Exper.
Rag anal

Normalized deviation

Res. 3
Sigma
(R + SR)
Average
(grand-avg)
(known) Tag
NH
146.0
140.0
133.0
6.51
0.307
139.67
-1.31
-1.89

NJ
160.0
156.0
149.0
5.57
0.260
155.00
-0.25
-0.82

NK
137.0
142.0
148.0
5.51
0.260
142.33
-1.13
-1.70

NO
153.3
157.4
158.9
2.90
0.132
156.53
-0.15
-0.72

NT
163.2
159.1
155.0
4.10
0.194
159.10
0.03
-0.54

0
178.7
176.4
174.8
1.96
0.092
176.63
1.25
0.67

OF
134.0
135.0
137.6
1.86
0.085
135.53
-1.60
-2.17

OM








•:
OS
210.0
212.0
217.0
3.61
0.165
213.00
3.77
3.19
it
ox
178.2
172.5
173.5
3.04
0.135
174.73
1.12
0.54

OY
153.0
154.0
155.0
1.00
0.047
154.00
-0.32
-0.89

P
174.6
153.9
173.6
11.67
0.489
167.37
0.60
0.03

PA
140.5
140.5
140.5
0.00
0.000
140.50
-1.26
-1.83

PB
186.8
187.0
181.8
2.95
0.123
185.20
1.84
1.27

PG
167.0
177.0
176.0
5.51
0.236
173.33
1.02
0.45

PM
151.1
156.8
160.8
4.87
0.229
156.23
-0.17
-0.74

PQ








•
PR
130.0
110.0
120 0
10.00
0.47a
120.00
-2.68
-3.25
u.
PV
141.8
149.5
134.8
7.35
0.347
142.03
-1.15
-1.72

FW








«
Q
186.3
189.0
185.8
1.72
0.076
187.03
1.97
1.39

QC








•
QJ








•-
QP
183.8
186.3
172.2
7.52
0.333
180.77
1.53
0.96

QQ
149.2
138.6
155X7
10.55
0.499
149.17
-0.66
-1.23

QT
165.3
176.1
163.1
6.96
0.307
168.17
0.66
0.09

QU
144.5
141.2
147.8
3.30
0.156
144.50
-0.98
-1.55

QW
148.5
156.6
151.7
4.08
0.191
152.27
-0.44
-1.01

QX
165.6
169.8
165.9
2.34
0.099
167.10
0.59
0.01

QY








•'
QZ
159.6
162.3
158.3
2.04
0.095
160.07
0.10
-0.47

RD
166.2
165.6
165.7
0.32
0.014
165.83
0.50
-0.07

RF
159.0
161.0
173.0
7.57
0.331
164.33
0.39
-0.18

RG
158.0
157.0
152.0
3.21
0.142
155.67
-0.21
-0.78

RI
165.9
165.8
171.7
3.38
0.139
167.80
0.63
0.06

RK
149.5
150.1
132.0
10.28
0.428
143.87
-1.02
-1.60

RP








»
RR
272,0
276,0
273.0
1:53
0.071
273.33
7*96
13,1
X
RU
144.0
150.1
160.0
8.07
0.378
151.37
-0.50
-1.08

RZ








9
S
177.2
186.2
189.1
6.21
0.281
184.17
1.77
1.20

sc
i4a .2
153.9
155.4
3.80
0.170
152.50
-0.43
-1.00

SD
155.6
149.3
162.6
6.65
0.314
155.83
-0.19
-0.77

SF
195.6
197.5
163.9
18.87
0.794
185.67
1.87
1.30

SG
120.0
126.2
130.3
5.19
0.243
125.50
-2.30
-2.87

• =
No data submitted

TAG SYMBOLS

Tf = Above control limit
0 s
Insufficient data
x =
Determined to be an outlier
s Below control limit
-------
CRD-LV Performance Evaluation: Blind-B, 16-Apr-1996	7/43
Gross Beta
Lab Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rag anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known) Tag
SI
130.0
123.0
141.0
9.07
0.425
131.33
-1.89
-2.46

SL
148.0
155.0
150.0
3.61
0.165
151.00
-0.53
-1.10

SM
145.2
147.1
155.2
5.31
0.236
149.17
-0.66
-1.23

SN
160.0
161.5
166.8
3.57
0.161
162.77
0.29
-0.29

SO
131.0
138.5
137.3
4.03
0.177
135.60
-1.60
-2.17

SR
134.5
150.2
141.8
7.86
0.371
142.17
-1.14
-1.71

SS
157.9
163.7
164.0
3.44
0.144
161.87
0.22
-0.35

ST








•
sx
162.0
171.0
160.0
5.86
0.260
164.33
0.39
-0.18

sz
133.0
144.2
157.7
12.37
0.584
144.97
-0.95
-1.52

T
163.5
159.4
157.0
3.29
0.154
159.97
0.09
-0.48

TD








•
TG
165.1
170.3
160.3
5.00
0.236
165.23
0.46
-0.12

TH
170.0
170.0
170.0
0.00
0.000
170.00
0.79
0.21

TL








•
TN
166.4
180.0
148.1
16.01
0.754
164.83
0.43
-0.14

TQ
169.0
171.0
170.0
1.00
0.047
170.00
0.79
0.21

TS
185.5
192.1
193.3
4.20
0.184
190.30
2.19
1.62

TY
163.0
170.0
170.0
4.04
0.165
167.67
0.63
0.05

U
166-9
174.7
170.2
3.92
0.184
170.60
0.83
0.26

UA
130.0
144.0
138.0
7.02
0.331
137.33
-1.48
-2.05

UE
198.0
190.0
193.0
4.04
0.189
193.67
2.43
1.85

UK
33.0
47.0
24.1
11.54
0.541
34.70
-8.69
-9.16
X
UN
154.0
155.0
155.0
0.58
0.024
154.67
-0.28
-0.85

UP
142.8
148.0
150.3
3.84
0.177
147.03
-0.80
-1.38

UQ
156.0
161.0
155.0
3.21
0.142
157.33
-0.09
-0.66

UW








•
VA
84.2
93.8
87.3
4.90
0.227
88.43
-4i86
-6.44
X
VH
130.7
136.3
148.4
9.05
0.418
138.47
-1.40
-1.97

VI
144.0
145.0
145.0
0.58
0.024
144.67
-0.97
-1.54

VJ
156.0
156.0
158.0
1.15
0.047
156.67
-0.14
-0.71

VM








«
VO
155.7
157.6
159.5
1.90
0.090
157.60
-0.07
-0.64

VT









W
157.0
152.0
161.0
4.51
0.213
156.67
-0.14
-0.71

WE
164.2
183.7
182.7
10.98
0.461
176.87
1.26
0.69

WF








•
WO
171.5
177.2
175.7
2.95
0.135
174.80
1.12
0.55

WR
143.0
145.0
148.0
2.52
0.118
145.33
-0.92
-1.49

X
164.5
178.7
170.7
7.12
0.335
171.30
0.88
0.30

¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦
Data sorted by Laboratory Average
Average	Tag	Lab Average	Tag	Lab Average	Tag	Lab
34.70	x	UK 118.80	U	MY 120.00	tt	PR
88.43	x	VA 119.63	Jj	JM 120.67	U	BW
• s No data submitted	TAG SYMBOLS	ft = Above control limit
0 3 Insufficient data	x s Determined to be an outlier	11 a Below control limit
-------
	
8/43	CRD-LV Performance Evaluation: Blind-B, 16-Apr-1906
Gross Beta
Data sorted by Laboratory Average
Average
Tag
Lab
Average
Tag
Lab
Average
Tag
Lab
124.43

JN
152.50

SC
164.33

SX
125.50

SG
152.83

BO
164.33

RF
127.33

AE
153.07

CX
164.83

TN
128.80

ID
153.97

MV
165.23

TG
131.33

SI
154.00

OY
165.33

LR
131.87

DZ
154.00

AK
165.83

RD
135.53

OF
154.67

UN
166.17

L
135.60

SO
154.67

HP
166.17

AW
136.60

AJ
154.70

BB
166.60

E
136.67

AZ
154.87

CA
166.93

N
137.33

UA
154.90

HL
167.00

DB
138.47

VH
155.00

NJ
167.10

QX
139.00

MF
155.00

CS
167.37

P
139.67

NH
155.03

I
167.47

BA
139.67

AR
155.57

JE
167.67

TY
140.50

PA
155.67

RG
167.80

RI
142.03

PV
155.67

FZ
168.17

QT
142.17

SR
155.77

AP
168.23

AF
142.33

NK
155.83

SD
168.87

EB
143.87

RK
156.23

PM
170.00

TQ
144.23

GT
156.37

CE
170.00

TH
144.50

QU
156.53

NO
170.23

BM
144.67

VI
156.67

W
170.60

U
144.97

sz
156.67

VJ
171.07

FJ
145.33

WR
156.67

LF
171.30

X
146.47

DE
156.67

A
173.00

KX
146.93

LL
157.33

UQ
173.33

PG
147.03

UP
157.33

CK
173.37

HK
147.33

GQ
157.57

AL
174.40

EV
148.63

DD
157.60

VO
174.73

OX
148.67

DS
159.10

NT
174.77

GZ
149.17

SM
159.53

BC
174.80

WO
149.17

QQ
159.63

FF
175.67

DT
149.17

BN
159.97

T
176.10

BS
150.03

BH
160.00

CJ
176.63

O
150.33

FN
160.07

QZ
176.87

WE
150.67

JY
161.20

CG
179.33

AH
151.00

SL
161.30

C
180.77

QP
151.03

KE
161.33

M
181.17

JS
151.27

AU
161.53

D
183.67

BK
151.37

RU
161.87

ss
184.17

S
151.67

BG
162.77

SN
185.20

PB
152.27

QW
163.03

J
185.67

SF
152.33

FT.
163.67

EO
187 03

9
• = No data submitted
0 = Insufficient data
TAG SYMBOLS
x = Determined to be an outlier
n
= Above control limit
= Below control limit
-------
CRD-LV Performance Evaluation: Blind-B, 18-Apr-1996

9/43
Gross Beta
Data sorted by Laboratory Average
Average
Tag
Lab
Average
Tag
Lab
Average
Tag
Lab
189.67

LT
193.67

UE
206.60

JQ
190.30

TS
195.00

NA
213.00
ir
OS
191.93

JG
200.00

KT
223.20
273.33
X
X
K
RR
responding labs
Frequency distribution
10-
0JT
i responding labs


N>

-4	-2	0	+2	+4
Normalized deviation of the mean from the known value
Frequency distribution
+6
104
o

i
|	¦-
-4	-2	0	+2	+4
Normalized deviation of the mean from the grand average

• = No data submitted
0 = Insufficient data
TAG SYMBOLS
x = Determined to be an outlier
ft s Above control limit
11 s n«lnw cnntrnl
-------
CRD-LV Performance Evaluation: Blind-B, 16-Apr-1996
10/43
Strontium-89	Statistical Summary	175 Participants
The known value of this nuclide is 43.0 pCi/1 with an expected precision of 5.0; the control limits
are 34.3 to 51.7; the warning regions are 34.3 to 37.2 and 48.8 to 51.7
96(54.9 %) Failed to respond
9(5.1 %) Outliers
5(2.9 %) Out of control
but not an outlier
Statistic
/ 56(32.0 %) Within all limits
Respondents
*• 9(5.1 %) In warning zone
but within control
Non-outliers
Mean
Std. Dev.
Variance
% Coef. of Var.
% deviation of mean from known value
Norm. dev. of mean from known value
Median
% deviation of median from known value
Norm. dev. of median from known value
42.55
20.49
420.01
48.17
¦1.05
-0.02
41.00
-4.65
-0.10
Grand Avg 41.09
4.21
17.75
10.25
-4.45
-0.45
41.00
-4.65
-0.47
15(19.0 %) More than 3 norm. S.D. •
8( 10.1 %) Between 2 and
,40(50.6%) Within 1 norm. S.D.
•	of known value
Between 1 and 2 norm. S.D.
-------
11/43
CRD-LV Performance Evaluation: Blind-B, 16-Apr-1996
"v
'
Strontium-89







Lab
Res. 1
Res. 2
Res. 3
Exper.
Rng anal

Normalized deviation
Sigma
(R + SR)
Average
(grand-avg)
fknown) Tag
A
61.0
60.0
93,0
1.53
0.354
61.33
7,01
8.35 I*-.
AE
44.0
42.0
44.0
1.15
0.236
43.33
0.78
0.12
AF
44.0
45.0
43.0
1.00
0.236
44.00
1.01
0.35
AH







*
AJ
43.0
44.0
47.0
2.08
0.473
44.67
1.24
0.58
AK
38.5
43.8
40.3
2.70
0.626
40.87
-0.08
-0.74
AL
42.0
43 0
42.0
0.58
0.118
42.33
0.43
-0.23
AP







«
AR







•
AU
38.0
38.0
40.0
1.15
0.236
38.67
-0.84
-1.50
AW
41.0
40.0
40.0
0.58
0.118
40.33
-0.26
-0.92
AZ
43.0
45.0
45.0
1.15
0.236
44.33
1.13
0.46
BA
47.0
44.0
45.0
1.53
0.354
45.33
1.47
0.81
BB







•
BC
36.0
40.0
39.0
2.08
0.473
38.33
-0.95
-1.62
BO








BH
42.0
44.0
40.0
2.00
0.473
42.00
0.32
-0.35
BK







•
BL
42.0
51.0
40.0
5.86
1.570
44.33
1.13
0.46
BM
38.0
44.0
41.0
3.00
0.709
41.00
-0.03
-0.69
BN







•
BO
41.0
41.0
41.0
0.00
0.000
41.00
-0.03
-0.69
BB







•
BW







•
C
42.0
43.0
43.0
0.58
0.118
42.67
0.55
-0.12
CA
43.0
45.0
38.0
3.61
0.827
42.00
0.32
-0.35
CE








CG
48.0
50.0
54.0
3.06
0.709
50.67
3.32
2.66
CJ
40.0
44.0
40.0
2.31
0.473
41.33
0.09
-0.58
CK
32.0
32.0
34.0
1.15
0.236
32.67
-2.92
-3.58 U
CM







•
CO







*
cs
37.7
36.3
37.6
0.78
0.165
37.20
-1.35
-2.01
cx
n
20,0
10.0
21.0
6.08
1.570
17.00
-8.34
-9.01 *
Ml
DB







©
•
DD
44.0
43.0
45.0
1.00
0.236
44.00
1.01
0.35
DE
39.9
40.0
40.0
0.06
0.012
39.97
-0.39
-1.05
DI







*
DO
35.0
31.0
31.0
2.31
0.473
32.33
-3.03
-3.70 U
DS








DT
44.0
43.0
42.0
1.00
0.236
43.00
0.66
0.00
DZ
49.0
52.0
51.0
1.53
0.354
50.67
3.32
2.66
E
30.0
34.0
30.0
2.31
0.473
31.33
-3.38
-4.04 U
EB
50.0
45.0
42.0
4.04
0.945
45.67
1.59
0.92
• =
No data submitted

TAG SYMBOLS

T! = Above control limit
0 =
Insufficient data
V SB
flfl+orminn
/I 4-n Vin <*•
.4.1:—
It T1 ¦
* *'
-------
	
CRD-LV Performance Evaluation: Blind-B, 16-Apr-1996	12/43
Strontium-89
Lab Re's. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-nvg) (known) Tag
EL
45.0
47.0
46.0
1.00
0.236
46.00
1.70
1.04
EO







•
EB,








EV







.«•
FF








FJ








FL








FN








FZ
44.0
37.0
48.0
5.57
1.570
43.00
0.66
0.00
GI







•'
GQ
wto
ei.o
620
1.00
0.236
6100:
6;90
624: k
GT







»-
GZ








HI







•
HK
37.0
38.0
37.0
0.58
0.118
37.33
-1.30
-1.96
HL







*
HP
32.0
39.0
35.0
3.51
0.827
35.33
-1.99
-2.66
HX







•-
I
47.0
48.0
49.0
1.00
0.236
48.00
2.40
1.73
ID







•
J
42.2
39.8
41.7
1.27
0.284
41.23
0.05
-0.61
JE








JG







•
JM







•m
JN








JQ
210;0-
216:0
194.0
11.37
4.046
206.67
57.36
56f70 x
JS
39.0
39.0
43.0
2.31
0.473
40.33
-0.26
-0.92
JY
44.0
41.0
46.0
2.52
0.591
43.67
0.89
0.23
K
42.0
40.0
40.0
1.15
0.236
40.67
-0.14
-0.81
KE







•
ST







•
KX
41.0
41.0
41.0
0.00
0.000
41.00
-0.03
-0.69
L
42.0
44.0
42.0
1.15
0.236
42.67
0.55
-0.12
LE
35.0
32.0
34.0
1.53
0.354
33.67
-2.57
-3.23 U
LF
44.0
45.0
46.0
1.00
0.236
45.00
1.36
0.69
LL








LR







•
LT
15.0
17.0
16.0
1.00
0.236
16.00
-8;69
#136 x
M
51.0
46.0
51.0
2.89
0.591
49.33
2.86
2*19
MF







•
MP







*
MV







«
taY







9
N
40.0
40.0
40.0
0.00
0.000
40.00
-0.38
-1.04
NA







•
• h No data submitted	TAG SYMBOLS	IT s Above control limit
I 0 = Insufficient data	x s Determined to be an outlier	s Below control limit
¦ , - -	„ ....	..	,	JJ
-------

13/43
CRD-LV Performance Evaluation: Blind-B, 16-Apr-1996
Strontium-89
Lab
Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(gTand-avg) (known)
NH








NJ
41.0
44.0
38.0
3.00
0.709
41.00
-0.03
-0.69
NK






NO
44.0
44.0
45.0
0.58
0.118
44.33
1.13
0.46
NT
44.0
45.0
47.0
1.53
0.354
45.33
1.47
0.81
O








OF








OM








OS








OX








OY








P








PA








PB
17,0
18.0
17.0
0.58
0.118
17.33
-8.23
-8.S9
PG








PM








PQ








PR








PV
14,0
17.0
13.0
2.08
0.473
14.67
-9,15
-9.81
PW








Q
47.0
44.0
45.0
1.53
0.354
45.33
1.47
0.81
QC








QJ








QP








QQ








QT








QU
40.0
41.0
39.0
1.00
0.236
40.00
-0.38
-1.04
QW
38.0
43.0
40.0
2.52
0.591
40.33
-0.26
-0.92
QX








QY








QZ
36.0
36.0
34.0
1.15
0.236
35.33
-1.99
-2.66
RD








RF
24.0
24;0
23.0
0.58
0.118
23.67
-6,03
-6.70
RG








RI








RK
39.0
41.1
38.0
1.58
0.366
39.37
-0.60
-1.26
RP








RR
45.0
45.0
44.0
0.58
0.118
44.67
1.24
0.58
RU








RZ








S
42.0
43.0
42.0
0.58
0.118
42.33
0.43
-0.23
sc
33.0
36.0
34.0
1.53
0.354
34.33
-2.34
-3.00
SD
43.0
44.0
36.0
4.36
0.945
41.00
-0.03
-0.69
SF
45.0
47.0
45.0
1.15
0.236
45.67
1.59
0.92
SG








• =
No data submitted

TAG SYMBOLS

ft = Above control'
0 = Insufficient data
x = Determined to be an outlier
= Below control
-------
CRD-LV Performance Evaluation: Blind-B, 18-Apr-199fl
—
14/43
Strontium-89
Lab Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known) Tag
SI
47.0
44.0
33.0
7.37
2.245
41.33
0.09
-0.58

SL







•
SM
39.0
48.0
44.0
4.51
1.120
43.67
0.89
0.23
SN







m
SO








i
SR








»
ss
42.0
40.0
41.0
1.00
0.236
41.00
¦0.03
-0.69

ST








•
SX








•
sz
40.0
37.0
39.0
1.53
0.354
38.67
-0.84
-1.50

T
36.0
39.0
37.0
1.53
0.354
37.33
-1.30
-1.96

TD









TG








a
TB








•
TL








*
IN








*
TQ
38.0
40.0
40.0
1.15
0.236
39.33
-0.61
-1.27

T8









TY









U
37.0
34.0
35.0
1.53
0.354
35.33
-1.99
-2.66

UA








%
UE
45.0
41.0
44.0
2.08
0.473
43.33
0.78
0.12

UK








•
UN
31.0
29.0
32.0
1.53
0.354
30.67
-3.61
-4.27
*
UP
36.0
39.0
41.0
2.52
0.591
38.67
-0.84
-1.50

vq








•
uw








•
VA
67.0
60.0
76.0
8.02
2.695
67.67
9,21
8.54
X
VH
38.0
39.0
39.0
0.58
0.118
38.67
-0.84
-1.50

VI
37.0
42.0
37.0
2.89
0.591
38.67
-0.84
-1.50

VJ









VM









VO
37.0
35.0
38.0
1.53
0.354
36.67
-1.53
-2.19

VT









W
35.0
41.0
40.0
3.21
0.709
38.67
-0.84
-1.50

WE








,*
WF








«
WO








»
WR








~
X
44.0
43.0
44.0
0.58
0.118
43.67
0.89
0.23

Data sorted by Laboratory Average
Average	Tag	Lab Average	Tag	Lab j Average	Tag	Lab
14.67	x	PV 17.00	x	CX 23.67	x	RF
16.00	x	LT 17.33	x	PB 1 30.67	U	UN
• s No data submitted TAG SYMBOLS	It s Above control limit
0 a Insufficient data	x s Determined to be an outlier	It s Below control limit
-------
15/43
CRD-L.V Performance Evaluation: Blind-B, 16-Apr-1996

)
Strontium-89










Data sorted by Lflbomtory Average


Average
Tag
Lab
Average
Tag
Lab
Average
Tag
Lab
31.33

E
40.33

QW
43.67

X
32.33

DO
40.33

JS
43.67

5M
32.67
U
CK
40.33

AW
43.67

JY
33.67

LE
40.67

K
44.00

DD
34.33

sc
40.87

AK
44.00

AF
35.33

u
41.00

SS
44.33

NO
35.33

QZ
41.00

SD
44.33

BL
35.33

HP
41.00

NJ
44.33

AZ
36.67

VO
41.00

KX
44.67

RR
37.20

CS
41.00

BO
44.67

AJ
37.33

T
41.00

BM
45.00

LF
37.33

HK
41.23

J
45.33

Q
38.33

BC
41.33

SI
45.33

NT
38.67

W
41.33

CJ
45.33

BA
38.67

VI
42.00

CA
45.67

SF
38.67

VH
42.00

BH
45.67

EB
38.67

UP
42.33

S
46.00

EL
38.67

sz
42.33

AL
48.00

I
38.67

AU
42.67

L
49.33

M
39.33

TQ
42.67

C
50.67

DZ
39.37

RK
43.00

FZ
50.67

CG
39.97

DE
43.00

DT
61.00
X
GQ
40.00

QU
43.33

UE
61.33
X
A
40.00

N
43.33

AE
67.67
X
VA






206.67
X
JQ
% responding labs	Frequency distribution
10-

¦f ¦ 1		»,¦ ¦—^
Normalized deviation of the mean from the known value
responding labe	Frequency distribution
10-
l.ill lll.ll
	.	, ¦¦ y | ¦¦BflBllI lllfllBw, m ¦, I—,	,	
-4	-2	0+2+4	*6
Normalized deviation of the mean from the grand average
• = No data submitted	TAG SYMBOLS	ft s Above control limit
g? = Insufficient data	x s Determinml tnhp on	11 - T3-1	^
-------
CRD-LV Performance Evaluation: Blind-B, 16-Apr-1996
16/43
Strontium-90
Statistical Summary
175 Participants
The known value of this nuclide is 16.0 pCt/1 with an expected precision of 5.0; the control limits
are 7.3 to 24.7; the warning regions are 7.3 to 10.2 and 21.8 to 24.7
91 (52.0 %) Failed to respond
3(1.7 %) Outliers
Statistic
; 76(43.4 %) Within all limits
Respondents
	5(2.9 %) In warning zone
but within control
Non-outliers
Mean
15.52
Grand Avg 15.39
Std. Dev.
4.46
2.49
Variance
19.87
6.22
% Coef. of Var.
28.71
16.21
% deviation of mean from known value
-2.97
-3.80
Norm. dev. of mean from known value
-0.11
-0.24
Median
15.33
15.33
% deviation of median from known value
-4.17
-4.17
Norm. dev. of median from known value
-0.15
-0.27
3(3.6 %) More than 3 norm. S.D. •
5(6.0 %) Between 2 and 3 norm. S.D.'
. 65(77.4 %) Within 1 norm. S.D.
of known value
• 11 (13.1 %) Between 1 and 2 norm. S.D.
-------
17/43

CRD-LV Performance Evaluation: Blind-B, IS-Apr-1996


Stroii ti um-00








Lab
Rea. 1
Res. 2

Exper.
Rng anal

Normalized deviation

Rea. 3
Sigma
(R + SR)
Average
(grand-avg)
(known) Tag
A
17.0
16.0
17.0
0.58
0.113
16.67
0.44
0.23

AE
15.0
15.0
15.0
0.00
0.000
15.00
-0.14
-0.35

AF
15.0
14.0
15.0
0.58
0.118
14.67
-0.25
-0.46

AH








- •-
AJ
16.0
15.0
14.0
1.00
0.236
15.00
-0.14
-0.35

AK
15.0
15.4
16.4
0.72
0.165
15.60
0.07
-0.14

AL
15.0
16.0
15.0
0.58
0.118
15.33
-0.02
-0.23

AP








9
AR








•
AU
13.0
13.0
13.0
0.00
0.000
13.00
-0.83
-1.04

AW
19.0
17.0
18.0
1.00
0.236
18.00
0.90
0.69

AZ
16.0
15.0
15.0
0.58
0.118
15.33
-0.02
-0.23

BA
14.0
14.0
13.0
0.58
0.118
13.67
-0.60
-0.81

BB
15.0
16.0
15.0
0.58
0.118
15.33
-0.02
-0.23

BC
17.0
17.0
16.0
0.58
0.118
16.67
0.44
0.23

BG
12.0
14.0
10.0
2.00
0.473
12.00
-1.18
-1.39

BH
16.0
16.0
16.0
0.00
0.000
16.00
0.21
0.00

BK








•
BL
17.0
13.0
16.0
2.08
0.473
15.33
-0.02
-0.23

BM
14.0
14.0
15.0
0.58
0.118
14.33
-0.37
-0.58

BN








•
BO
16.0
15.0
16.0
0.58
0.118
15.67
0.10
-0.12

BS








«
BW








•
C
17.0
17.0
17.0
0.00
0.000
17.00
0.56
0.35

CA
12.0
17.0
17.0
2.89
0.591
15.33
-0.02
-0.23

CE
16.0
14.0
14.0
1.15
0.236
14.67
-0.25
-0.46

CG
16.0
17.0
15.0
1.00
0.236
16.00
0.21
0.00

CJ
15.0
16.0
15.0
0.58
0.118
15.33
-0.02
-0.23

CK
19.0
19.0
19.0
0.00
0.000
19.00
1.25
1.04

CM








•
CO








•
cs
19.8
18.0
18.3
0.96
0.213
18.70
1.15
0.94

cx
r»
13.0
12.0
13.0
0.58
0.118
12.67
-0.94
.1 15

U
DB








•
DD
16.0
15.0
16.0
0.58
0.118
15.67
0.10
-0.12

DE
15.0
15.0
15.0
0.00
0.000
15.00
-0.14
-0.35

DI.








•
DO
9.0
10.0
8.0
1.00
0.236
9.00
-2.21
-2.42

OS








•
DT
13.0
15.0
14.0
1.00
0.236
14.00
-0.48
-0.69

DZ
19.0
17.0
19.0
1.15
0.236
18.33
1.02
0.81

E
10.0
11.0
13.0
1.53
0.354
11.33
-1.41
-1.62

EB
13.0
16.0
14.0
1.53
0.354
14.33
-0.37
-0.58

• s No data submitted

TAG SYMBOLS

ft s Above control limit
0 = Insufficient data	x g Determined to be an outlier 	 ^ a Below control limit
-------
CRD-LV Performance Evaluation: Blind-B, 16-Apr-1998	18/43
Strontium-90
Lab Res. 1
Res. 2
Ren. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known) Tag
EL
15.0
15.0
14.0
0.58
0.118
14.67
-0.25
-0.46

SO








ER









EV








;0-
FF








+
FJ








~
FL









FN









FZ
15.0
17.0
14.0
1.53
0.354
15.33
-0.02
-0.23

GI








•
GQ
9.0
9.0
9.0
0.00
0.000
9.00
-2.21
-2.42

GT








•
GZ








:*
HI








*
HK
14.0
14.0
14.0
0.00
0.000
14.00
-0.48
-0.69

HL








M
HP
18.0
15.0
16.0
1.53
0.354
16.33
0.33
0.12

HZ








%
I
14.0
14.0
15.0
0.58
0.118
14.33
-0.37
-0.58

ID








*
J
16.7
16.5
16.7
0.12
0.024
16.63
0.43
0.22

JE
15.0
18.0
13.0
2.52
¦0.591
15.33
-0.02
-0.23

JG









JM








*
JN








•
JQ








•
JS
16.0
17.0
15.0
1.00
0.236
16.00
0.21
0.00

JY
14.0
16.0
15.0
1.00
0.236
15.00
-0.14
-0.35

K
15.0
15.0
15.0
0.00
0.000
15.00
-0.14
-0.35

EE








•
KT








•
KX
17.0
17.0
17.0
0.00
0.000
17.00
0.56
0-J5

L
14.0
14.0
14.0
0.00
0.000
14.00
-0.48
-0.69

LE
17.0
18.0
17.0
0.58
0.118
17.33
0.67
0.46

LF
16.0
16.0
18.0
1.15
0.236
1667
0.44
0.23

IX








*
LR








•
LT
18.0
18.0
17.0
0.58
0.118
17.67
0.79
0.58

M
11.0
10.0
11.0
0.58
0.118
10,67
-1.64
-1.85

MF








•
MP








•
MV








«
MY








•
N
15.0
15.0
16.0
0.58
0.118
15.33
-0.02
-0.23

NA








-•
« s
0 s
No data submitted
Insufficient data
x s
TAG SYMBOLS
Determined to be an outlier
"ft s Above control limit
-U s Below control limit
-------
s.	:	=_=	
19/43
CRD-LV Performance Evaluation: Blind-B, 16-Apr-1996

	^
Strontium-90








Lab
Res. 1
Res. 2
Res. 3
Exper.
Rng anal

Normalized deviation

Sigma
(R + SR)
Average
(grand-avg)
(known) Tag
NH


	




. .
. - -
NJ
14.0
13.0
15.0
1.00
0.236
14.00
-0.48
-0.69

NK









NO
15.0
16.0
16.0
0.58
0.118
15.67
0.10
-0,12

NT
16.0
16.0
16.0
0.00
' 0.000
16.00
0.21
0.00

o









OP








V'»
OM








•
OS








' *
OK









OX









P









PA









FB
47.0
48.0:
!48.0
0.58
0.118
4&33|
1&72;
^051?
X ; •
PQ









PM









PQ








i?«
PR









PV
11.0
12.0
14.0
1.53
0.354
12.33
-1.06
-1.27

pw;








- ™
*4%-
Q
17.0
15.0
18.0
1.53
0.354
16.67
0.44
0.23

QC








*y,-
QJ









QP









QQ









QT








»*
QU
18.0
18.0
17.0
0.58
0.118
17.67
0.79
0.58

QW
19.0
16.0
17.0
1.53
0.354
17.33
0.67
0.46

QX








li''*
QY









QZ
110
11.0
11.0
0.00
0.000
11.00
-1.52
-1.73

KD









BP
6.0

>60
0.58
0.118
6.33
S&4B?
-V«-
*3i70

EG







., . K -

RI








-
RK
17.6
16.9
17.0
0.38
0.083
17.17
0.61
0 40

HP









RR
15,0
16.0
16.0
0.58
0.118
15.67
0.10
-0.12

RV








•"y""
RZ








' ft
S
16.0
16.0
16.0
0.00
0.000
16.00
0.21
0.00

sc
16.0
16.0
15.0
0.58
0.118
15.67
0.10
-0.12

SD
15.0
15.0
16.0
0.58
0.118
15.33
-0.02
-U.23

SF
18,0
18.0
18.0
0.00
0.000
18.00
0.90
0.69

8G








'ft
• =
No data submitted

TAG SYMBOLS

it a Above control limit
in
Insufficient data
x s
Determined to be an outlier
U = Below control limit
-------
CRD-LV Performance Evaluation: Blind-B, 16-Apr-1996	20/43
Strontium-90








Lab
Res. 1
Res. 2

Exper.
Rng anal

Normalized deviation

Res. 3
Sigma
(R + SR)
Average
(grand-avg)
(known) Tag
SI
14.0
22.0
30.0
8.00
2.695
22.00
2.29
2.08

SL








VI
SM
11.0
13.0
15.0
2.00
0.473
13.00
-0.83
-1.04

SN









SO








' ¦
SB









ss
16.0
16.0
16.0
0.00
0.000
16.00
0.21
0.00

ST








• 'S?
sx









sz
15.0
15.0
15.0
0.00
0.000
15.00
-0.14
-0.35

T
13.0
14.0
13.0
0.58
0.118
13.33
-0.71
-0.92

TD








- -V" !f
; v
TO








• r.
TH
23.0
24.0
23.0
0.58
0.118
23.33
2.75
2.54

TL









TN









TQ
15.0
14.0
16.0
1.00
0.236
15.00
-0.14
-0.36

TS








' - ¦ n*
TY








v
• f
U
16.0
17.0
16.0
0.58
0.118
16.33
0.33
0.12

UA








vl
UE
17.0
17.0
17.0
0.00
0.000
17.00
0.56
0.35

UK









UN
18.0
17.0
15.0
1.53
0.354
16.67
0.44
0.23

UP
11.0
13.0
13.0
1.15
0.236
1233
-1.06
-1.27

UQ









uw









VA
17.0
16.0
14.0
1.53
0.354
15.67
0.10
-0.12

VH
15.0
18.0
17.0
1.53
0.354
16.67
0,44
0.23

VI
7.0
1.0
9.0
4.16
0.945
5.67
-3.37
-3.58

VJ








&
•
.
' • f
VM








VO
14.0
14.0
13.0
0.58
0.118
13.67
-0.60
-0.81

VT








I # |
W
15.0
13.0
i+o
1.00
0.236
14.00
-0.48
-0.69

WE








« y
WF








• 4
WO








• 4
WR
23.0
23.0
24.0
0.58
0.118
23.33
2.75
2.54

X
10.0
10.0
12.0
1.15
0.236
10.67
-1.64
-1.85

Daia sorted by Laboratory Average
Average	Tag	Lab Average	Tag	Lab Average	Tag	Lab
5.33	x	RF 9.00	GQ 10.67	X
5.67	x	VI	9.00	DO 10.67 	M
• s No data submitted TAG SYMBOLS ft a Above control limit
0 a Insufficient data 	x & Determined to be an outlier	II s Below control limit
-------
21*43	CRD-LV Performance Evaluation: Blind-B, 16-Apr-1990
Strontium-90
Data sorted by Laboratory Average
Average
Tag
Lab
Average
Tar
Lab
Average
Tag
Lab
11.00

QZ
15.00

DE
16.33
— 1 -O		
U
11.33

E
15.00

AJ
16.33

HP
12.00

BG
15.00

AE
16.63

J
12.33

UP
15.33

SD
16.67

VH
12.33

PV
15.33

N
16.67

UN
12.67

CX
15.33

JE
16.67

Q
13.00

SM
15.33

FZ
16.67

LF
13.00

AU
15.33

CJ
16.67

BC
13.33

T
15.33

CA
16.67

A
13.67

VO
15.33

BL
17.00

UE
13 67

BA
15.33

BB
17.00

KX
14.00

W
15.33

AZ
17.00

C
14.00

NJ
15.33

AL
17.17

RK
14.00

L
15.60

AK
17.33

QW
14.00

HK
15.67

VA
17.33

LE
14.00

DT
15,67

SC
17.67

QU
14.33

1
15.67

RR
17.67

LT
14.33

EB
15.67

NO
18.00

SF
14.33

BM
15.67

DD
18.00

AW
14.67

EL
15.67

BO
18.33

DZ
14.67

CE
16.00

SS
18.70

cs
14.67

AF
16.00

s
19.00

CK
15.00

TQ
16.00

NT
22.00

SI
15.00

SZ
16.00

JS
23.33

WR
15.00

K
16.00

CG
23.33

TB
15.00

JY
16.00

BH
46.33
X
PB
% responding labs	Frequency atribution
20-
10-
i	i	r—®	1	'—i		7	¦—1	1	1	r
4	-4	-2	i>	*2	a	*6
Normalized, deviation of the mean from the known value
« = No data submitted	TAG SYMBOLS	ft = Above control limit
0 s Insufficient data	x s Determined to be an outlier	U = Below control limit
^ ¦ ¦ ¦ - ¦ - -			¦ ¦	¦¦	-	.. -y
-------
CRD-LV Performance Evaluation: Blind-B, 16-Apr-1996	22/43
Strontium-90
%
20
10
0
responding labs 	Frequency distribution
lj
. 			
—.	,	1——¦, l—llJl

Normalized deviation of the mean from the grand average
-------
CRD-LV Performance Evaluation: Blind-B, 16-Apr-1996
====»
23/43
Cobalt-60	Statistical Summary	175 Participants
The known value of this nuclide is 31.0 pCi/1 with an expected precision of 5.0; the control limits
are 22.3 to 39.7; the warning regions are 22.3 to 25.2 and 36.8 to 39.7
60(34.3 %) Failed to respond ,
, 107(61.1 %) Within all limits
-** XK.

—••2(1.1 %) in warning zone
6(3.4 %) Outliers ***

but within control
I |


Statistic
Respondents
Non-outliers
Mean
31.59
Grand Avg 31.60
Std. Dev.
3.93
2.10
Variance
15.43
4.42
% Coef. of Var.
12.43
6.65
% deviation of mean from known value
1.89
1.95
Norm. dev. of mean from known value
0.15
0.29
Median
31.33
31.33
% deviation of median from known value
1.08
1.08
Norm. dev. of median from known value
0.08
0.16
6(5.2 %) Mora than 3 norm. S.D. •.,
.91(79.1 %) Within 1 norm. S.D.
of known value
-------
24/43
CRD-LV Performance Evaluation: Blind-B, 16-Apr-1996

Cobalt-60







Lab
Res. 1
Res. 2

Exper.
Rug anal

Normalized deviation
Res. 3
Sigma
-------
((	








	
V.

CRD-LV Performance Evaluation: Blind-B, 16-Apr-1998
2S/43
Cobalt-AO








Lab
Res. 1
Res. 2

Exper.
Rng anal

Normalized deviation

Res. 3
Sigma
(R + SR)
Average
(grand-avg)
(known) Tag
EL
32.0
31.0
31.0
0.58
0.118
31.33
-0.09
0.12

EO








-
•
ER








a.
# "sS
EV








*4
FP









FJ
32.0
30.0
32.0
1.15
0.236
31.33
-0.09
0.12

FL
33.0
32.0
35.0
1.53
0.354
33.33
0.60
0.81

FN









FZ
32.0
30.0
32.0
1.15
0.236
31.33
-0.09
0.12

GI
30.3
30.3
29.6
0.40
0.083
30.07
-0.53
-0.32

GQ
28.0
30.0
29.0
1.00
0.236
29.00
-0.90
-0.69

OT








•V4"1
GZ








• T
HZ








• ^1
HK
31.0
31.0
31.0
0.00
0.000
31.00
-0.21
0.00

HL
30.0
32.0
31.0
1.00
0.236
31.00
-0.21
0.00

HP
30.0
30.0
30.0
0.00
0.000
30.00
-0.56
-0.35

HX
29.9
30.4
30.7
0.40
0.095
30.33
-0.44
-0.23

I
33.0
31.0
27.0
3.06
0.709
30.33
-0.44
-0.23

n>









J
31.9
30.8
31.3
0.55
0.130
31.33
-0.09
0.12

JE
31.0
33.0
30.0
1.53
0.354
31.33
-0.09
0.12

JG
30.7
30.4
30.9
0.25
0.059
30.67
-0.32
-0.12

JM
32.0
34.0
33.0
1.00
0.236
33.00
0.48
0.69

JN








# *
JQ









JS
31.0
31.0
30.0
0.58
0.118
30.67
-0.32
-0.12

JY
33.0
33.0
33.0
0.00
0.000
33.00
0.48
0.69

K
26.0
30.0
28.0
2.00
0.473
28.00
-1.25
-1.04

EE









KT









KX
32.0
34.0
32.0
1.15
0.236
32.67
0.37
0.58

L
33.0
33.0
34.0
0.58
0.118
33.33
0.60
0.81

LE
25.0
33.0
36.0
5.69
1.570
31.33
-0.09
0.12

LF
33.0
32.0
29.0
2.08
0.473
31.33
-0.09
0.12

LL









LR
28.0
32.0
34.0
3.06
0.709
31.33
-0.09
0.12

LT
30.0
31.0
29.0
1.00
0.236
30.00
-0.56
-0.35

M
31.0
31.0
30.0
0.58
0.118
30.67
-0.32
-0.12

MF








• -4
MP
30.0
29.0
30.0
0.58
0.118
29.67
-0.67
-0.46

MV
26.0
24.0
29.0
2.52
0.591
26.33
-1.83
-1.62

MY
29.0
30.0
30.0
0.58
0.118
29.67
-0.67
-0.46

N
32.0
32.0
32.0
0.00
0.000
32.00
0.14
0.35

NA









• =
No data submitted

TAG SYMBOLS

ft a Above control limit
in
IS
—V
Insufficient data
x =
Determined to be an outlier
Jl a Below control limit
-------
/	
28/43
CRD-LV Performance Evaluation: Blind-B, 16-Apr-1996

	
Cobalt-60







¦ "
Lab
Res. 1
Res. 2

Exper.
Rng anal

Normalized deviation

Rea. 3
Sigma
(R + SR)
Average
(grand-avg)
(known) Tag
NH
29.0
30.0
31.0
1.00
0.236
30.00
-0.56
-0.35

NJ
30.0
30.0
30.0
0.00
0.000
30.00
-0.56
-0.35

NK
29.0
29.0
27.0
1.15
0.236
28.33
¦1.13
-0.92

NO
43.0
46.0
46.0
3.00
0.709
46,00
4.99
6.20
X-
NT









O
31.0
32.0
32.0
0.58
0.118
31.67
0.02
0.23

OF








»
OM
30.0
31.0
30.0
0.58
0.118
30.33
¦0.44
-0.23

OS








•
OX








•
OY








•
P
23.0
21.0
19.0
2.00
0.473
21.00
-3.67
-3.46
X
PA








•
PB
32.0
34.0
31.0
1.53
0.354
32.33
0.25
0.46

PG








•
PM
32.0
28.0
34.0
3.06
0.709
31.33
-0.09
0.12

PQ








•
PR








..
PV
31.0
36.0
34.0
2.52
0.591
33.67
0.71
0.92

PW
30.0
31.0
31.0
0.58
0.118
30.67
-0.32
-0.12

Q
31.0
29 0
30.0
1.00
0.236
30.00
-0.56
-0.35

QC








'*•
QJ








•
QP
30.0
29.0
30.0
0.58
0.118
29.67
-0.67
-0.46

QQ








*
QT
29.0
30.0
30.0
0.58
0.118
29.67
-0.67
-0.46

QU
31.0
33.0
29.0
2.00
0.473
31.00
-0.21
0 00

QW
33.0
35.0
33.0
1.15
0.236
33.67
0.71
0.92

QX
36.0
36.0
37.0
0.58
0.118
36.33
1.64
1.85

QY









QZ
32.0
32.0
32.0
0.00
0.000
32.00
0.14
0.35

RD








*
RF
32.0
30.0
32.0
1.15
0.236
31.33
-0.09
0.12

EG








•
RI








•
RK
27.8
28.9






0
RP








«
RR
33.0
31.0
32.0
1.00
0.236
32.00
0.14
0.35

RU
32.0
30.0
32.0
1.15
0.236
31.33
-0.09
0.12

RZ








9
S
30.0
31.0
30.0
0.58
0.118
30.33
-0.44
-0.23

sc
27.0
28.0
30.0
1.53
0.354
28.33
-1.13
-0.92

SD
33.0
32.0
30.0
1.53
0.354
31.67
0.02
0 23

SF
27.0
31.0
25.0
3.06
0.709
27.67
-1.36
-1.15

8G








*
• 5
No data submitted

TAG SYMBOLS

It = Above control limit
in
$
Insufficient data
X s
Determined to be an outlier
U s Below control limit
				 ¦¦ 				Y
-------
CRD-LV Performance Evaluation: Blind-B, 18-Apr-1996
===v
27/43
Cobalt-60
Lab Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known) Tag
SI
41.0
28.0
32.0
6.66
2.020
33.67
0.71
0.92

SL







#
SM
34.0
34.0
37.0
1.73
0.354
35.00
1.18
1.39

SN
29.0
28.0
31.0
1.53
0.354
29.33
-0.79
-0.58

SO







«
SR
31.0
35.0
31.0
2.31
0.473
32.33
0.25
0.46

ss
35.0
31.0
34.0
2.08
0.473
33.33
0.60
0.81

ST







•
sx
31.0
30.0
31.0
0.58
0.118
30.67
-0.32
-0.12

sz
33.0
34.0
32.0
1.00
0.236
33.00
0.48
0.69

T
27.0
28.0
29.0
1.00
0.236
28.00
-1.25
-1.04

TD
35.0
35.0
32.0
1.73
0.354
34.00
0.83
1.04

TG









TH








*
TL









TN








«
TQ
27.0
28.0
28.0
0.58
0.118
27.67
-1.36
-1.15

TS
36.9
37.9
37.0
0.55
0.118
37.27
1.96
2.17

TY








•
U
33.0
33.0
32.0
0.58
0.118
32.67
0.37
0.58

UA








•
UE
30.0
32.0
31.0
1.00
0.236
31.00
-0.21
0.00

UK
62.0
47.0
49.0
2.52
0.591
49 33
6.14
6.35
X
UN
32.0
32.0
31.0
0.58
0.118
31.67
0.02
0.23

UP
30.0
30.0
30.0
0.00
0.000
30.00
-0.56
-0.35

UQ








•
uw








»
VA
37.0
33.0
35.0
2.00
0.473
35.00
1.18
1.39

VH
30.0
31.0
28.0
1.53
0.354
29.67
-0.67
-0.46

VI
31.0
32.0
33.0
1.00
0.236
32.00
0.14
0.35

VJ









VM
43.8
40.1
40.0
2.17
0.449
41.30
3.36
3,57
X
VO
36.0
32.0
33.0
2.08
0.473
33.67
0.71
0.92

VT








*
w
33.0
30.0
33.0
1.73
0.354
32.00
0.14
0.35

WE








«
WF









WO
24.0
21.0
31.0
5.13
1.345
25.33
-2.17
-1.96

WR
28.0
33.0
34.0
3.21
0.709
31.67
0.02
0.23

X
39.0
38.0
40.0
1.00
0.236
39.00
2.56
2.77

Data sorted by Laboratory Average
Average
Tag
Lab
Average
Tag
Lab
Average
Tag
Lab
14.00
X
BW
21.00
X
P
26.33

MV
16.00
X
BG
25.33

WO
27.67

TQ
• s No data submitted	TAG SYMBOLS	ft a Above control limit
0 = Insufficient data	x = Determined to be an outlier	J) s Below control limit
VN 	¦ i
-------
(28 / 43	CRD-LV Performance Evaluation: Blind-B, 16-Apr-1996
Cobalt-60
Data sorted by LnHomtorv Average
Average
Tag
Lab
Average
Tag
Lab
Average
Tag
Lab
27.6?

SF
31.00

HL
32.33

CK
28.00

T
31.00

HK
32.67

U
28.00

K
31.33

RU
32.67

KX
28.33

SC
31.33

RF
32,67

CA
28.33

NK
31.33

PM
32.67

AH
29.00

GQ
31.33

LR
33.00

SZ
29.13

DE
31.33

LF
33.00

JY
29.33

SN
31.33

LE
33.00

JM
29.67

VH
31,33

JE
33.00

DT
29.67

QT
31.33

J
33.00

BN
29.67

QP
31.33

FZ
33.00

BK
29.67

MY
31.33

FJ
33.00

AL
29.67

MP
31.33

EL
33.33

SS
30.00

UP
31.33

BO
33.33

L
30.00

Q
31.33

BL
33.33

FL
30.00

NJ
31.33

AZ
33.33

DO
30.00

NH
31.33

AU
33.33

BA
30.00

LT
31.33

AJ
33.67

VO
30.00

HP
31.67

WR
33.67

SI
30.00

£
31.67

UN
33.67

QW
30.00

CX
31.67

SD
33.67

PV
30.07

GI
31.67

O
33.67

BH
30 33

S
31.67

CJ
34.00

TD
30.33

OM
31.67

BM
34,00

C
30.33

I
31.97

AK
34.00

BB
30.33

HX
32.00

W
34.20

CS
30.33

AF
32.00

VI
34.60

AP
30.33

A
32.00

RR
34.67

AW
30.67

SX
32,00

QZ
35.00

VA
30.67

PW
32.00

N
35.00

SM
30.67

M
32.00

EB
36.33

QX
30.67

JS
32.00

CE
36.33

DZ
30.67

JG
32.00

BC
37.27

TS
30.67

DD
32.00

AE
39-00

X
31.00

UE
32.33

SE
41.30
X
VM
31.00

QU
32.33

PB
46.00
49.33
X
X
NO
UK
• s No data submitted	TAG SYMBOLS	ft a Above control limit
0 s Insufficient data	x a Determined to be an outlier	^ & Below
-------
	
CRD-LV Performance Evaluation: Blind-B, 16-Apr-1996	29/43
Cobalt-60
% responding labs	Frequency distribution
20-
10-
JLllL
¦ ¦! ¦
0J ¦¦ "|	I m I	T ~ I	I	'T" ~ I — —I — I	I™ I'
*6	-4	-2	0	+2	+4	>6
Normalized deviation of the mean from the known value
% responding labs	Frequency distribution	
20-
10-
o
-t- ¦
¦T—¦ i ¦	.	f	p"
-6	-4-2	0+2+4+4
Normalized deviation of the mean from the grand average
-------
CRD-LV Performance Evaluation: Blind-B, 16-Apr-1996
30/43
Cesium*! 34	Statistical Summary	175 Participants
The known value of this nuclide is 46.0 pCi/1 with an expected precision of 6.0; the control limits
are 37.3 to 54.7; the warning regions are 37.3 to 40.2 and 51.8 to 54.7
59(33.7 %} Foiled to respond ;
96(54.9 %) Within all limits
3(1.7 %) Outliers : I "*---		
	 y

4(2.3 %) Out of control**

"¦-» 13(7.4 %) In warning zone
but not an outlier
I ]
I 1033^
but within control
Statistic
Respondents
Non-outliers
Mean
42.63
Grand Avg 43.10
Std. Dev.
4.26
3.11
Variance
18.17
9.70
% Coef. of Var.
10.00
7.22
% deviation of mean from known value
-7.33
-6.30
Norm. dev. of mean from known, value
-0.79
-0.93
Median
42.67
42.83
% deviation of median from known value
-7.25
-6.88
Norm. dev. of median from known value
-0.78
-1.02
7(6.0 %) More than 3 norm, S.D.
13(11.2 %) Between 2 and 3 norm. S.D
<18(39.7 %) Within 1 norm. S.D.
of known value
50(43.1 %) Between 1 and 2 norm. S.D.
-------
31/43
CRD-LV Performance Evaluation: Blind-B, lfl-Apr-1986

)
Cesium-134








Lab
Res. 1
Res. 2
Res. 3
Exper.
Rng anal

Normalized deviation

Sigma
(R + SR)
Average
(grand-avg)
(known) Tag
A
41.0
39.0
37.0
2.00
0.473
39.00
-1.42
-2.42

AE
43.0
41.0
43.0
1.15
0.236
42.33
-0.27
-1.27

AF
42.0
40.0
41.0
1.00
0.236
41.00
-0.73
-1.73

AH
45.0
50.0
46.0
2.65
0.591
47.00
1.35
0.35

AJ
40.0
40.0
40.0
0.00
0.000
40.00
-1.07
-2.08

AK
43.3
42.4
42.8
0.45
0.106
42.83
-0.09
-1.10

AL
51.0
51.0
48.0
1.73
0.354
50.00
2.39
1.39

AP
45.6
43.0
41.6
2.03
0.473
43.40
0.10
-0.90

AR









AU
42.0
41.0
42.0
0.58
0.118
41.67
-0.50
-1.50

AW
36.0
36.0
36.0
0.00
0.000
36.00
-2.46
-3.46
Ji
AZ
49.0
48.0
47.0
1.00
0.236
48.00
1.70
0.69

BA
46.0
44.0
44.0
1.15
0.236
44.67
0.54
-0.46

BB
46.0
46.0
46.0
0.00
0.000
46.00
1.00
0.00

BC
49.0
48.0
47.0
1.00
0.236
48.00
1.70
0.69

BG
56.0
50.0
53.0
3.00
0.709
53.00
3.43
2.42

BH
45.0
46.0
48.0
1.53
0.354
46.33
1.12
0.12

BK
51.0
51.0
52.0
0.58
0.118
51.33
2.85
1.85

BL
42.0
42.0
44.0
1.15
0.236
42.67
-0.15
-1.15

BM
44.0
48.0
47.0
2.08
0.473
46.33
1.12
0.12

BN
42.0
42.0
42.0
0.00
0.000
42.00
-0.38
-1.39

BO
40.0
46.0
43.0
3,00
0.709
43.00
-0.04
-1,04

BS








•
BW
2*0
18.0
22.0
3.06
0.709
21.33

-8,64
X
C
48.0
47.0
44.0
2.08
0.473
46.33
1.12
0.12

CA
43.0
44.0
42,0
1.00
0.236
43.00
-0.04
-1.04

CE
45.0
45.0
43.0
1.15
0.236
44.33
0.43
-0.58

CG








•
CJ
41.0
42.0
44.0
1.53
0.354
42.33
-0.27
-1.27

CK
41.0
45.0
47.0
3.06
0.709
44.33
0.43
-0.58

CM








*
CO








~
cs
47.8
47.9
47.9
0.06
0.012
47.87
1.65
0.65

cx
46.0
42.0
41.0
2.65
0.591
43.00
-0.04
-1.04

D








•
DB








•
DD
44.0
43.0
44.0
0.58
0.118
43.67
0.20
-0.81

DE
41.0
41.2
41.2
0.11
0.024
41.13
-0.68
-1.69

DI









DO
41.0
40.0
51.0
6.08
1.570
44.00
0.31
-0.69

DS








.«
DT
44.0
47.0
42.0
2.52
0.591
44.33
0.43
-0.58

DZ
34.0
36.0
33.0
1.53
0.354
34.33
-3.04
-4.04

E
41.0
44.0
42.0
1.53
0.354
42.33
-0.27
-1.27

EB
42.0
42.0
42.0
0.00
0.000
42.00
-0.38
-1.39

9 =
No data submitted

TAG SYMBOLS

It s Above control limit
0 =
Insufficient data
x =
Determined to be an outlier
U s Below control limit
-------
CRD-LV Performance Evaluation: Blind-B, 16-Apr-1996	32 / 43
Cesium-134
Lab
Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known)
Tag
EL
42.0
42.0
44.0
1.15
0.236
42.67
-0.15
-1.15

EO







ER









EV









FF








¦ *>
FJ
40.0
46.0
39.0
3.79
0.827
41.67
-0.50
-1.50

FL
46.0
43.0
47.0
2.00
0.473
45.00
0.66
-0.35

FN







•
FZ
44.0
42.0
45.0
1.53
0.354
43.67
0.20
-0.81
GI
40.0
39.7
41.1
0.74
0.165
40.27
-0.98
-1.99

GQ
42.0
41.0
42.0
0.58
0.118
41.67
-0.50
-1.50

GT








¦ 0-
GZ








0.
HI








-•
HK
42.0
41.0
43.0
1.00
0.236
42.00
-0.38
-1.39

HL
45.0
44.0
46.0
1.00
0.236
45.00
0.66
-0.35

HP
41.0
42.0
42.0
0.58
0.118
41.67
-0.50
-1.50

HX
41.6
41.8
41.3
0.25
0.059
41.57
-0.53
-1.54

I
42.0
43.0
400
1.53
0.354
41.67
-0.50
-1.50

ID







•
J
46.4
44.9
45.4
0.76
0.177
45.57
0.85
-0.15

JE
43.0
44.0
43.0
0.58
0.118
43.33
0.08
-0.92

JG
36.9
36.4
36.1
0.40
0,095
36.47
-2.30
-3.30

JM
46.0
46.0
45.0
0.58
0.118
45.67
0.89
-0.12

JN








•
JQ








•
JS
43.0
43.0
43.0
0.00
0.000
43.00
-0.04
-1.04

JY
41.0
41.0
43.0
1.15
0.236
41.67
-0.50
-1.50

K
51.0
48.0
47.0
2.08
0.473
48.67
1.93
0.92

KE









KT








• <
KX
45.0
45.0
43.0
1.15
0.236
44.33
0.43
-0.58

L
45.0
45.0
46.0
0.58
0.118
45.33
0.77
-0.23

LE
43.0
45.0
36.0
4.73
1.120
41.33
-0.61
-1.62

LF
44.0
41.0
41 0
1.73
0.354
42.00
-0.38
-1.39

LL









LR
4U.U
42.0
46.0
3.06
0.709
42.67
-0.15
-1.15

LT
44.0
45.0
37.0
4.36
0.945
42.00
-0.38
-1.39

M
39.0
40.0
39.0
0.58
0.118
39.33
-1.31
-2.31

MF









MP
39.0
41.0
41.0
1.15
0.236
40.33
-0.96
-1.96

MV
28.0
29.0
27 >0
1.00
0.236
28.00
-5.23
-6.24
X
MY
45.0
45.0
45.0
0.00
0.000
45.00
0.66
-0.35

N
45.0
44.0
44.0
0.58
0.118
44.33
0.43
-0.58

NA









• = No data submitted	TAG SYMBOLS	1T = Above control limit
0 = Insufficient data	x = Determined to be an outlier	JJ = Below control limit
^ '	JJ
-------
	=
33/43
CRD-LV Performance Evaluation: Blind-B, 16-Apr-1996


Cesium-134








Lab
Res. 1
Res. 2
Res. 3
Exper.
Rng anal

Normalized deviation

Sigma
(R + SR)
Average
(grand-avg)
(known) Tag
NH
42.0
42.0
42.0
0.00
0.000
42.00
-0.38
-1.39

NJ
37.0
41.0
39.0
2.00
0.473
39.00
-1.42
-2.42

NK
40.0
44.0
41.0
2.08
0.473
41.67
-0.50
-1.50

NO
49.0
50.0
52.0
1.53
0.354
50.33
2.50
1.50

NT







*¦
O
45.0
41.0
45.0
2.31
0.473
43.67
0.20
-0.81

OP








•
OM
39.0
40.0
40.0
0.58
0.118
39.67
-1.19
-2.19

OS








9 ¦
OX








4
OY








•
P
24,0
22.0
29.0
3.61
0.827
25.00
-6.27
-727
X
PA








*
PB
47.0
44.0
45.0
1.53
0.354
45.33
0.77
-0.23

PG








9
PM
37.0
38.0
44.0
3.79
0.827
39.67
-1.19
-2.19

PQ








•
PR








¦4
PV
42.0
41.0
43.0
1.00
0.236
42.00
-0.38
-1.39

PW
44.0
42.0
43.0
1.00
0.236
43.00
-0.04
-1.04

Q
43.0
44.0
45.0
1.00
0.236
44.00
0.31
-0.69

QC








«
QJ








•
QP
35.0
35.0
36.0
0.58
0.118
35.33
-2.69
-3.70

QQ








•
QT
41.0
40.0
40.0
0.58
0.118
40.33
-0.96
-1.96

QU
43.0
43.0
42.0
0.58
0.118
42.67
-0.15
-1.15

QW
47.0
46.0
46.0
0.58
0.118
46.33
1.12
0.12

QX
45.0
46.0
47.0
1.00
0.236
46.00
1.00
0.00

QY








*
QZ
40.0
44.0
43.0
2.08
0.473
42.33
-0.27
-1.27

RD








*
RF
44.0
46.0
44.0
1.15
0.236
44.67
0.54
-0.46

RG








9
RI








e
RK
39.7
43.8
42.0
2.06
0.484
41.83
-0.44
-1.44

RP








0
RR
42.0
41.0
42.0
0.58
0.118
41.67
-0.50
-1.50

RU
40.0
41.0
42.0
1.00
0.236
41.00
-0.73
-1.73

RZ








0
S
43.0
43.0
42.0
0.58
0.118
42.67
-0.15
-1.15

sc
38.0
38.0
42.0'
2.31
0.473
39.33
-1.31
-2.31

SD
49.0
47.0
46.0
1.53
0.354
47.33
1.47
0.46

SF
46.0
41.0
43.0
2.52
0.591
43.33
0.08
-0.92

SG








#
t =
No data submitted

TAG SYMBOLS

1! s Above control limit
in
Q
jX
Insufficient data
x =
Determined to be an outlier
U = Rplrnt
r rnnirftl li

-------
CRD-LV Performance Evaluation: Blind-B, 16*Apr-1996
34/43
Cesium-134
Lab Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known) Tag
SI
45.0
38.0
50.0
6.03
1.795
44.33
0.43
-0.58

SL







ft
SM
45.0
45.0
46.0
0.58
0.118
45.33
0.77
-0.23

SN
48.0
43.0
43.0
2.89
0.591
44.67
0.54
-0.46

SO






•
SR
39.0
42.0
44.0
2.52
0.591
41.67
-0.50
-1.50

ss
45.0
46.0
46.0
0.58
0.118
45.67
0.89
-0.12

ST







~
sx
38.0
40.0
38.0
1.15
0.236
38.67
-1.54
-Z.54

sz
41.0
43.0
42.0
1.00
0.236
42.00
-0.38
-1.39

T
43.0
43.0
42.0
0.58
0.118
42.67
-0.15
-1.15

TD
44.0
39.0
42.0
2.52
0.591
41.67
-0.50
-1.50

TG







•-
ra








•
TL








#
IN








*
TQ
39.0
36.0
39.0
1.73
0.354
38.00
-1.77
-2.77

TS
47.5
46.1
46.6
0.71
0.165
46.73
1.26
0.25

TY









U
45.0
46.0
45.0
0.58
0.118
45.33
0.77
-0.23

UA








•
UE
45.0
46.0
45.0
0.58
0.118
45.33
0.77
-0.23

UK
35.0
40.0
48.0
6.56
2.020
41.00
-0.73
-1.73

UN
42.0
43.0
43.0
0.58
0.118
42.67
-0.15
-1.15

UP
38.0
38.0
38.0
0.00
0.000
38.00
-1.77
-2.77

UQ








+
UW









VA
46.0
41.0
43.0
2.52
0.591
43.33
0.08
-0.92

VH
40.0
39.0
39.0
0.58
0.118
39.33
-1.31
-2.31

VI
44.0
42.0
44.0
1.15
0.236
43.33
0.08
-0.92

VJ








m
VM
39.4
37.3
40.0
1.42
0.319
38.90
-1.46
-2.46

VO
47.0
43.0
43.0
2.31
0.473
44.33
0.43
-0.58

vr








•
w
40.0
44.0
42.0
2.00
0.473
42.00
-0.38
-1.39

WK








•
WF









WO
48.0
46.0
50.0
2.00
0.473
48.00
1.70
0.69

WR
42.0
43.0
44.0
1.00
0.236
43.00
-0.04
-1.04

X
45.0
42.0
45.0
1.73
0.354
44.00
0.31
-0.69

Average
Tag
Data sorted by Laboratory Average
Lab Average
Tag-
Lab
Average
Tag-
Lab
21.33
25.00
x
x
BW
P
28.00
34.33
x
MV
DZ
35.33
36.00

QP
AW
• ~ No data submitted
0 = Insufficient data
TAG SYMBOLS
x = Determined to be an outlier
ft a Above control limit
= Below control limit
-------
35/43
CRD-LV Performance Evaluation: Blind-B, 16-Apr-1996
r		—	¦
Cesrium-134
Data sorted by Laboratory Average
Average
Tag
Lab
Average
Tag
Lab
Average
Tag
Lab
36.47
u
tTG
42.00

NH
44.33

N
38.00

UP
42.00

LT
44.33

KX
38.00

TQ
42.00

LF
44.33

DT
38.67

SX
42.00

HK
44.33

CK
38.90

VM
42.00

EB
44.33

CE
39.00

NJ
42.00

BN
44.67

SN
39.00

A
42.33

QZ
44.67

RF
39.33

VH
42.33

E
•4.67

BA
39.33

sc
42.33

CJ
45.00

MY
39.33

M
42.33

AE
45.00

HL
39.67

PM
42.67

UN
45.00

FL
39.67

OM
42.67

T
45.33

UE
40.00

AJ
42.67

S
45.33

U
40.27

GI
42.67

QU
45.33

SM
40.33

QT
42.67

LR
45.33

PB
40.33

MP
42.67

EL
45.33

L
41.00

UK
42.67

BL
45.57

J
41.00

RU
42.83

AK
45.67

SS
41.00

AF
43.00

WR
45.67

JM
41.13

DE
43.00

PW
46.00

QX
41.33

LE
43.00

JS
46.00

BB
41,57

HX
43.00

CX
46.33

QW
41.67

TD
43.00

CA
46.33

C
41.67

9R
43.00

BO
46.33

BM
41.67

RR
43.33

VI
46.33

BH
41.67

NK
43.33

VA
46.73

TS
41.67

JY
43.33

SF
47.00

AH
41.67

I
43.33

JE
47.33

SD
41.67

HP
43.40

AP
47.87

CS
41.67

GQ
43.67

O
48.00

WO
41.67

FJ
43.67

FZ
46.00

BC
41.67

AU
43.67

DD
48.00

AZ
41.83

RK
44.00

X
48.67

K
42.00

W
44.00

Q
50.00

AL
42.00

SZ
44.00

DO
50.33

NO
42.00

PV
44.33
44.33

VO
SI
51.33
53.00

BK
BG
• s No data submitted
0 3 Insufficient data
TAG SYMBOLS
x = Determined to be an outlier
ft
u
= Above control limit
s Below control limit
-------
CRD-LV Performance Evaluation: Blind-B, 16-Apr-1996
36/43
Ceaium-134
% responding laba 		Frequency distribution
10-
lllLl.1,1-
¦¦ ,
.	I ¦ I	I	I	I
-4	-2	0+2+4	+6
Normalized deviation of the mean from the known value
% responding labs	Frequency distribution	

10-
-6	-4	-2	0	+2	+4
Normalized deviation of the mean from the grand average
-------
CRD-LV Performance Evaluation: Bllnd-B, 16-Apr-1996
37 M3
Cesium-137
Statistical Summary
175 Participants
The known value of this nuclide is 50.0 pCi/1 with an expected precision of 5.0; the control limits
are 41.3 to 58.7; the warning regions are 41.3 to 44.2 and 55.8 to 58.7
56(33.7 %) Failed to respond •
« 98<56.0 %) Within all limits
6(3.4 %) Outliers 	

P
1 (0.6 %) Out of control •*"*

11 (6.3 %) In warning zone
but not an outlier

but within control
Statistic
Respondents
Non-outliers
Mean
51.09
Grand Avg 51.17
Std. Dev.
5.44
3.31
Variance
29.60
10.96
% Coef. of Var,
10.65
6.47
% deviation of mean from known value
2.17
2.33
Norm. dev. of mean from known value
0.20
0.35
Median
51.17
51.17
% deviation of median from known value
2.33
2.33
Norm. dev. of median from known value
0.21
0.35
7(6.0 %) More than 3 norm. S.D. »,

71(61.2 %) Within 1 norm. S.O.
of known value
-------
38/43
CRD-LV Performance Evaluation; Blind-B, 16-Apr-1996
Cesium-137
Lab Res. 1
Rea. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known) Tag
A
51.0
50.0
49.0
1.00
0.236
50.00
-0.40
0.00
AE
50.0
50.0
51.0
0.58
0.118
50.33
¦0.29
0.12
AF
51.0
50.0
50.0
0.58
0.118
50.33
-0.29
0.12
AH
49.0
55.0
56.0
3.79
0.827
53.33
0.75
1.15
AJ
51.0
50.0
51.0
0.58
0.118
50.67
-0.17
0.23
AK
49.9
50.1
50.5
0.31
0.071
50.17
-0.35
0.06
AL
43.0
43.0
41.0
1.15
0.236
42.33
-3.06
-2.66
AP
51.0
53.7
50.3
1.R0
0.402
51.67
0.17
0.58
AR







- •
AU
52.0
51.0
52.0
0.58
0.118
51.67
0.17
0.56
AW
50.0
49.0
51.0
1.00
0.236
50.00
-0.40
0.00
AZ
53.0
51.0
50.0
1.53
0.354
51.33
0.06
0.46
BA
49.0
47.0
48 0
1.00
0.236
48.00
-1.10
-0.69
BB
53.0
50.0
51.0
1.53
0.354
51.33
0.06
0.46
BC
52.0
51.0
51,0
0.58
0.118
51.33
0.06
0.46
BG
48.0
54.0
68.0
10.26
3.596
56.67
1.91
2.31
BH
53.0
54.0
54.0
0.58
0.118
53.67
0.87
1.27
BK
65.0
65.0
64,0
0.58
0.118
64.67
4.68
5.08 x
BL
49.0
51.0
50.0
1.00
0.236
50.00
¦0.40
0.00
BM
49.0
48.0
50.0
1.00
0.236
49.00
-0.75
-0.35
BN
550
60.0
56.0
2.65
0.591
57.00
2.02
2.42
BO
52.0
52.0
52.0
0.00
0.000
52.00
0.29
069
BS







•
BW
28.0
28.0
18.0
5.77
1.346
24.07
-9,18
-8.78 x
C
52.0
52.0
53.0
0.58
0.118
52.33
0.40
0.81
CA
50.0
53.0
54.0
2.08
0.473
52.33
0.40
0.81
CE
55.0
57.0
54.0
1.53
0.354
55.33
1.44
1.85
CG







• • -
CJ
52.0
54.0
51.0
1.53
0.354
52.33
0.40
0.81
CK
53.0
49.0
52.0
2.08
0.473
51.33
0.06
0.46
CM







-•
CO







.*
CS
59.9
57.9
58.0
1.13
0.236
58.60
2.57
2.98
cx
56.0
50.0
52.0
3.06
0.709
52.67
0.52
0.92
D







«
OB







- •
DD
54.0
54.0
54.0
0.00
0.000
54.00
0.98
1.39
DE
49.5
50.2
50.5
0.51
0.118
50.07
-0.38
0.02
DI








DO
51.0
58.0
49.0
4.73
1.120
52.67
0.52
0.92
DS







•
DT
51.0
56.0
54.0
2.52
0.591
53.67
0.87
1.27
DZ
38;0
38.0
38.0
0.58
o.ua
38.33
-4.45
-4.04 x
E
50.0
53.0
53.0
1.73
0.354
52.00
0.29
0.69
EB
54.0
54.0
53.0
0.58
0.118
53.67
0.87
1.27
• « No data submitted
0 = Insufficient data
TAG SYMBOLS
x s Determined to be an outlier
IT a Above control limit
Jl =	i: —
-------
CRD-LV Performance Evaluation: Blind-B, 16-Apr-1996	39/43
V		
Cesium-137








Lab
Res. 1
Res. 2

Exper.
Rng anal

Normalized deviation

Res. 3
Sigma
(R + SR)
Average
(grand-avg)
(known) Tag
EL
47.0
50.0
50.0
1.73
0.354
49.00
-0.75
-0.35

EO









ER








• i
BV









FF









FJ
41.0
49.0
44.0
4.04
0.945
44.67
-2.25
-1.85

FL
56.0
50.0
56.0
3.46
0.709
54.00
0.98
1.39











FZ
49.0
45.0
50.0
2,65
0.591
48.00
-1.10
-0.69

GI
49.5
50.3
50.8
0.66
0.154
50.20
-0.34
0.07

GQ
49.0
49.0
49.0
0.00
0.000
49.00
-0.75
-0.35

GT








~ - ;
GZ









HI








•
HK
52.0
52.0
52.0
0.00
0.000
52.00
0.29
0.69

HL
56.0
57.0
56.0
0.58
0.118
56.33
1.79
2.19

HP
52.0
53.0
52.0
0.58
0.118
52.33
0.40
0.81

HX
50.2
50.4
46.9
1.97
0.413
49.17
-0.69
-0.29

I
49.0
50.0
48.0
1.00
0.236
49.00
-0.75
-0.35

ID








- ¦;
J
50.6
48.7
49.9
0.96
0.224
49.73
-0.50
-0.09

JE
52.0
51.0
51.0
0.58
0.118
51.33
0.06
0.46

JG
45.1
45.3
40.9
2.48
0.520
43.77
-2.56
-2.16

JM
68;0
66.0
73,0
4.04
0.945
6967-

6A7
x
JN









JQ








•
JS
50.0
51.0
52.0
1.00
0.236
51.00
-0.06
0.35

JY
52.0
53.0
52.0
0.58
0.118
52.33
0.40
0.81

K
54.0
55.0
57.0
1.53
0.354
55.33
1.44
1.85

EE









KT








1 3
\ •
KX
54.0
52.0
49.0
2.52
0.591
51.67
0.17
0.58

L
57.0
55.0
54.0
1.53
0.354
55.33
1.44
1.85

LE
55.0
53.0
56.0
1.53
0.354
54.67
1.21
1.62

LF
50.0
53.0
52.0
1.53
0.354
51.67
0.17
0.58

LL









LR
49.0
47.0
50.0
1.53
0.354
48.67
-0.87
-0.46

LT
50.0
54.0
48.0
3.06
0.709
50.67
-0.17
0.23

M
50.0
51.0
51.0
0.58
0.118
50.67
-0.17
0.23

MF









MP
49.0
50.0
47.0
1.53
0.354
48.67
-0.87
-0.46

MV
44.4
44.0
44.7
0.35
0.083
44.37
-2.36
-1.95

MY
50.0
51.0
51.0
0.58
0.118
50.67
-0.17
0.23

N
52.0
53.0
53.0
0.58
0.118
52.67
0.52
0.92

NA








•
• s
No data submitted

TAG SYMBOLS

ft s Above control limit
0 s Insufficient data	x = Determined to be an outlier	it s Below control limit
-------
40/43
CRD-LV Performance Evaluation: Blind-B, 16-Apr-1996

Cesium-137







Lab
Res. 1
Res. 2

Exper.
Rng anal

Normalized deviation
Res. 3
Sigma
(R + SR)
Average
(grand-avg)
(known) Tag
NH
71.0
72.0
71.0
0.58
0.118
71.33
6.99
7.39 x
NJ
49.0
49.0
49.0
0.00
0.000
49.00
-0.75
-0.35
NK
49.0
53.0
49.0
2.31
0.473
50.33
-0.29
0.12
NO
54.0
59.0
61.0
3.61
0.827
58.00
2.37
2.77
NT







- •
O
56.0
55.0
55.0
0.58
0.118
55.33
1.44
1.85
OF







e
OM
42.0
43.0
43.0
0.58
0.118
42.67
-2.94
-2.54
OS







»
OX







•
OY








P
29.0
30.0
31.0
1.00
0.236
30.00
-7;33
-6.93 x
PA







•
PB
52.0
50.0
50.0
1.15
0.236
50.67
-0.17
0.23
PG







r
PM
50.0
49.0
47.0
1.53
0.354
48.67
-0.87
-0.46
PQ







•
PR







i
PV
52.0
53.0
51.0
1.00
0.236
52.00
0.29
0.69
PW
52.0
52.0
51.0
0.58
0.118
51.67
0.17
0.58
Q
49.0
48.0
48.0
0.58
0.118
48.33
-0.98
-0.58
QC







»
QJ








QP
46.0
47.0
46.0
0.58
0.118
46.33
-1.67
-1.27
QQ







•
QT
46.0
49.0
48.0
1.53
0.354
47.67
-1.21
-0.81
QU
53.0
51.0
54.0
1.53
0.354
52.67
0.52
0.92
QW
54.0
57.0
55.0
1.53
0.354
55.33
1.44
1.85
QX
56.0
57.0
55.0
1.00
0.236
56.00
1.67
2.08
QY







«
QZ
51.0
55.0
52.0
2.08
0.473
52.67
0.52
0.92
RD







•
RF
46.0
45.0
46.0
0.58
0.118
45.67
-1.91
-1.50
RG







p
RI







«
RK
49.2
46.5
48.0
1.35
0.319
47.90
-1.13
-0.73
RP







-•
RR
50.0
48.0
53.0
2.52
0.591
50.33
-0.29
0.12
RU
49.0
50.0
49.0
0.58
0.118
49.33
-0.64
-0.23
RZ








S
47.0
50.0
48.0
1.53
0.354
48.33
-0.98
-0.58
sc
48.0
51.0
49.0
1.53
0.354
49.33
-0.64
-0.23
SD
52.0
51.0
49.0
1.53
0.354
50.67
-0.17
0.23
SF
52.0
56.0
51.0
2.65
0.591
53.00
0.63
1.04
SG







•
• =
No data submitted

TAG SYMBOLS

It s Above control limit
0 = Insufficient data	x = Determined to h« an miflior
-------
CRD-LV Performance Evaluation: Blind-B, 16-Apr-1996
41/43
Cesium-137
Lab
Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known) Tag
SI
58.0
59.0
65.0
3.79
0.827
60.67
3.29
3.70 ft
SL







•?
SM
60.0
56.0
56.0
2.31
0.473
57.33
2.14
2.54
SN
53.0
49.0
49.0
2.31
0.473
50.33
-0.29
0.12
SO







ft
SR
53.0
52.0
50.0
1.53
0.354
51.67
0.17
0.58
SS
58.0
53.0
54.0
2.65
0.591
55.00
1.33
1.73
ST







»
SX
44.0
46.0
45.0
1.00
0.236
45.00
-2.14
-1.73
SZ
50.0
51.0
51.0
0.58
0.118
50.67
-0.17
0.23
T
52.0
50.0
52.0
1.15
0.236
51.33
0.06
0.46
TD
48.0
51.0
52.0
2.08
0.473
50.33
-0.29
0.12
HQ







•
TH







k
TL







M
TN







m
TQ
48.0
51.0
52.0
2.08
0.473
50.33
-0.29
0.12
TS
47.6
46.4
47.1
0.60
0.142
47.03
-1.43
-1.03
TY







•>
U
53.0
53.0
53.0
0.00
0.000
53.00
0.63
1.04
UA








UE
49.0
50.0
51.0
1.00
0.236
50.00
-0.40
0.00
UK
52.0
57.0
55.0
2.52
0.591
54.67
1.21
1.62
UN
51.0
53.0
55.0
2.00
0.473
53.00
0.63
1.04
UP
51.0
45.0
47.0
3.06
0.709
47.67
-1.21
-0.81
UQ








UW








VA
53.0
46.0
50.0
3.51
0.827
49.67
-0.52
-0.12
VH
46.0
49.0
47.0
1.53
0.354
47.33
-1.33
-0.92
VI
58.0
58.0
54.0
2.31
0.473
56.67
1.91
2.31
VJ







V:
VM
54.0
53.2
54.0
0.46
0.095
53.73
0.89
1.29
VO
58.0
55.0
50.0
4.04
0.945
54.33
1.10
1.50
VT








W
50.0
49.0
.49.0
0.58
0.118
49.33
-0.64
-0.23
WE







•
WF







w
WO
47.0
47.0
41.0
3.46
0.709
45.00
-2.14
-1.73
WR
50.0
51.0
51.0
0.58
0.118
50.67
-0.17
0.23
X
51.0
55.0
53.0
2.00
0.473
53.00
0.63
1.04
Average
TaS
Data sorted by Laboratory Average
Lab Average	Tag	Lab
Average
Tag
Lab
24.67
30.00
x
x
BW
P
38.33
42.33
DZ
AL
42.67
43.77
OM
JG
• s No data submitted
0 s Insufficient data
TAG SYMBOLS
x = Determined to be an outlier
{I s Above control limit
U s Below control limit
-------
42/43
\
CRD-LV Performance Evaluation: Blind-B, 16-Apr-1996


Cesium-137







Average

Data sorted by Laboratory Avernge


Tag
Lab
Average Tae
Lab
Average
Tag
Lab
44.37

MV
50.33
TQ
52.67
- - B
QZ
44.67

FJ
50.33
TD
52.67

QU
45.00

WO
50.33
SN
52.67

N
45.00

sx
50.33
RR
52.67

DO
45.67

RF
50.33
NK
52.67

CX
46.33

QP
50.33
AF
53.00

X
47.03

TS
50.33
AE
53.00

UN
47.33

VH
50.67
WR
53.00

u
47.67

UP
50.67
SZ
53.00

SF
47.67

QT
50.67
SD
53.33

AH
47.90

RK
50.67
PB
53.67

EB
48.00

FZ
50.67
MY
53.67

DT
48.00

BA
50.67
M
53.67

BH
48.33

S
50.67
LT
53.73

VM
48.33

Q
50.67
AJ
54.00

FL
48.67

PM
51.00
J8
54.00

DD
48.67

MP
51.33
T
54.33

VO
48.67

LR
51.33
JE
54.67

UK
49.00

NJ
51.33
CK
5467

LE
49.00

I
51.33
BC
55.00

ss
49.00

GQ
51.33
BB
55.33

QW
49.00

EL
51.33
AZ
55.33

O
49.00

BM
51.67
SR
55.33

L
49.17

HX
51.67
PW
55.33

K
49.33

W
51.67
LF
55.33

CE
49.33

SC
51.67
KX
56.00

QX
49.33

RU
51.67
AU
56.33

HL
49.67

VA
51.67
AP
56.67

VI
49.73

J
52.00
PV
56.67

BG
50.00

UE
52.00
HK
57.00

BN
50.00

BL
52.00
E
57.33

SM
50.00

AW
52.00
BO
58.00

NO
50.00

A
52.33
JY
58.60

cs
50.07

DE
52.33
HP
60.67
tr
SI
50.17

AK
52.33
CJ
64.67
X
BK
50.20

GI
52.33
CA
68.67
X
JM



52.33
C
71.33
X
NH
• = No data submitted

TAG SYMBOLS

it.
Above control limit
0 s Insufficient rinfrfl

v -r« n J 		

n
— ¦
' •
-------
CBJD-LV Performance Evaluation: Blind-B, 18-Apr-1996
43/43
Ceaium-137
% responding labs	Frequency distribution
10"
qJb ,	,	y .r. i	¦^lll llWUlfl wBlly Hf y , m
¦l.llll.l.-.
*4	~2	0	+2	+6
Normalized deviation of the mean from the known value
% responding labs	Frequency distribution
104
o
„iwt|lilu,i i
T —-T —	—y— , —	j » j	T"
¦A	-2	0	+2	+4	*4
Normalized deviation of the mean from the grand average
-------
Unites "States	Office of Research and	EPA/6Q0/R-96/093
Environmental Protection Development	August 1996
Agency	Washington, DC 20460
&EPA Gamma in Water
Performance
Evaluation Study
A Statistical Evaluation of
the June 7, 1996 Data
023RSL98.COVO93
-------
Gamma in Water
Performance Evaluation Study
June 7, 1996
Environmental Protection Agency
National Exposure Research Laboratory
Characterization Research Division
Las Vegas, Nevada
-------
UNITED STATES ENVIRONMENTAL PROTECTION AGENCY
OFFICE OF RESEARCH AND DEVELOPMENT
NATIONAL EXPOSURE RESEARCH LABORATORY
CHARACTERIZATION RESEARCH DIVISION-LAS VEGAS
P.O. BOX 93478
LAS VEGAS, NEVADA 89193-3478
(702^798-2100)
Dear Participant,
Enclosed are the results of the Analytical Sciences Branch (CRD-LV)
Performance Evaluation Study for Gamma in Water; June 7, 1996.
The known value for each analysis was determined by gravimetric methods, .
checked by chemical analyses performed by CRD-LV's Radiochemistry Laboratory,
and compared to the participating laboratories' grand average.
The expected precision, determined by the known value, was taken from
'Table 3. Laboratory Precision: One Standard Deviation Values and Control Limits
for Various Analyses", which is based on data accumulated over the years by the
Performance Evaluation Program, and can be found in the Environmental Radioactivity
Performance Evaluation Studies Program and Radioactive Standards Distribution
Program information brochure.
Please take a few minutes to review this report and the analytical data your
laboratory submitted to us. If there are any apparent discrepancies, please notify us
immediately.
We encourage you to make use of the computer-automated data-entry system
that has been in place for some time now. As the number of participants increases,
and it becomes unrealistic for us to receive results by mail or FAX, the computer
system will be our only avenue for accepting data.
If you have any questions or comments, please send a message via the data-entry
system or contact Stephen Pia at 702/798-2102 or Patricia Honsa at 702/798-2141.
Stephen Pia
Team Leader
RADQA Program
Enclosure
-------
NOTICE
This material has been funded wholly by
the U.S. Environmental Protection Agency.
It has been subjected to the Agency's review,
and has been approved for publication as
an EPA document.
-------
CBD-LV Performance Evaluation: Gamma in Water, 7-Jun-1996	1/37
The following pages consist of separate sections for each of the nuclides in this study with four
parts per section. After the firgt.. each part ip .qppnrntrd from the next by a new pnge or n thick
horizontal bar. The first page of each section is a statistical summary for the nuclide and starts
with a statement of the known value, the control limits, and the warning limits.
The warning limits are placed at two normalized standard deviations above and below the
known value and the control limits are three normalized standard deviations above and below
the known value. If you keep control charts, these values will be useful for anticipating problems
with the accuracy of your analytical methods.
The coin shaped pie chart at the top of the summary page shows the fate of all the samples
sent out in number and percentage terms. The pie chart starts at the top and rotates clockwise.
The first sector represents those participants who submitted analytical results within both the
warning and control limits. The next sector represents those who are in the warning region but
not out of control. The third sector represents those who are out of control, but have passed
the outlier test. The fourth sector represents those who have failed the outlier test. The last
sector represents those participants who have failed to respond properly. This is the case if no
analytical results were returned, or less than three determinations were reported, or if the results
were received too late. The reeding on the edge of the coin is spaced at one percent intervals, and
the sector shading becomes darker as the data reliability decreases. Sectors with zero width are
not shown.
The table in the center shows a number of statistical quantities calculated from the submitted
data based on the mean and median values in relation to the known value, both before and after
outlier removal. The lower pie chart uses the same construction as the upper chart and shows
the distribution of properly submitted data in terms of deviation from the known value divided
into sectors representing one, two, three, and greater than three normalized standard deviations.
The second part is an alphabetical listing, in lab-code order, of submitted data and several
calculated quantities. An entry that is shaded has been rejected because of one of the reasons
listed above or failure of the outlier test. The fifth and sixth columns are a measure of laboratory
precision. The Range analysis is a normalized value that you may use to keep precision control
charts. The eighth and ninth columns are the differences from the mean of all non-outliers and
from the known value, respectively. If this value is between 2.0 and 3.0, your analytical process
precision is in the warning zone; if it exceeds 3.0 it is out of control. A tag symbol may appear in
the last column. Each page with tags has a symbol definition summary at the bottom. If there is
no tag symbol, the data is within the control limits, but it may be in the warning zone.
The third part is a three-column listing of result average, tag symbol, and lab-code in average
order excluding those labs not responding properly. In this order, all outliers and out-of-control
results appear at the top or bottom of the list.
The last part is two bar chart displays showing frequency distributions of responding
participants. The first chart places the known value at the center and a bar at each 0.2 unit of
expected precision. The second chart places the mean of the reported measurements at the center
and a bar at each 0.2 unit of standard deviation. In both cases, a bar includes those results within
0.1 unit up to the maximum of six. Any results more than six units from the center value are
shown cumulatively by a shaded bar one past the sixth unit. If the central tendency of the known
value distribution falls away from the center, an error in accuracy is indicated. If the distribution
is broad, poor precision is indicated. The mean value distribution is similar but uses the average
and standard deviation of reported results as its basis.
-------
2/37
CRD-LV Performance Evaluation: Gamma in Water, 7-Jun-1996
The Range Analysis(R + SR) is calculated from the range, mean range and standard error of
the range values. The range is the difference hotween the maximum and minimum results for the
laboratory. The mean range is calculated by multiplying the expected precision by 1.693(for three
results). The standard error of the range is calculated by multiplying the mean range by 2.575(for
three results), subtracting the mean range from this product, and dividing the result by 3. If the
range is greater than the mean range, then the range analysis is calculated by subtracting the
mean range from the range, dividing the result by the standard error of the range and adding 1.
If the mean range is greater than or equal to the range, then the range analysis is calculated by
dividing the range by the mean range.
The normalized deviation of the mean from the grand average is calculated from the deviation
of the mean from the grand average and the standard error of the mean values. The deviation of
the mean from the grand average is calculated by subtracting the grand average from the
average of the laboratory's three results. The standard error of the mean is calculated by
dividing the expected precision by the square root of 3(the number of results). The normalized
deviation of the mean from the grand average is calculated by dividing the deviation of the mean
from the grand average by the standard error of the mean.
The normalized deviation of the mean from the known value is calculated from the deviation of
the mean from the known value and the standard error of the mean values. The deviation of the
mean from the known value is calculated by subtracting the known value from the average of the
laboratory's three results. The standard error of the mean is calculated by dividing the expected
precision by the square root of 3(the number of results). The normalized deviation of the mean
from the known value is calculated by dividing the deviation of the mean from the known value by
the standard error of the mean.
A complete explanation of the statistical calculations involved in the report may be found in
the Environmental Radioactivity Performance Evaluation Studies Program information brochure
[Draft Revision of EPA-600/4-81-004], available from Patricia Honsa, CRD-LV, 702/798-2141.
-------
CRD-LV Performance Evaluation: Gamma in Water, 7-Jun-1996	3/37
f	• ~~ ""	'	*	¦ ~~ ~	— - -	. —	- -	—	¦	~ —¦	'¦	—*	" ¦ "				—	i	-	- i—i - in
Cobftlt-60	Statistical Summary	167 Participants
The known value of this nuclide is 99.0 pCiA with an expected precision of 5.0; the control limits
are 90.3 to 107.7; the warning regions are 90.3 to 93.2 and 104.8 to 107.7
Statistic		Respondents	Non-outliers
Mean
118.28
Grand Avg 98.12
Std. Dev.
124.57
5.59
Variance
15518.24
31.21
% Coef. of Var.
105.32
5.69
% deviation of mean from known value
19.47
-0.89
Norm. dev. of mean from known value
0.15
-0.16
Median
98.00
98.00
% deviation of median from known value
-1.01
-1.01
Norm. dev. of median from known value
-0.01
-0.18
-------
4/37	CRD-LV Performance Evaluation: Gamma in Water, 7-Jun-1996
Cobalt-60
Lab
Res. 1
Rea. 2
Rea. 3
Exper.
Sigma
Rng anal
-------
I	CRD-LV Performance Evaluation: Gamma in Water, 7-Jun-1996
Cobalt-60	"
Lab
Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known) Tae
EW
97.0
97.0
96.0
0.58
0.118
96.67
-0.50
-0.81

EX
92.0
97.0
94.0
2.52
0.591
94.33
-1.31
-1.62

FJ
97.0
100.0
102.0
2.52
0.591
99.67
0.54
0.23

FL
103.0
97.0
101.0
3.06
0.709
100.33
0.77
0.46

FZ
92.0
90.0
89.0
1.53
0.354
90.33
-2.70
-3.00

GI
98.0
94.0
92.0
3.06
0.709
94.67
-1.20
-1.50

GL
94.0
101.0
98.0
3.51
0.827
97.67
-0.16
-0.46

CM*
1260
125.0
125.0
0.00
0.000
125.00
9i31
8.015
Xi
HI
95.0
102.0
96.0
3.79
0.827
97.67
0.16
0.46
c.
HK
99.0
98.0
99.0
0.58
0.118-
98.67
0.19
-0.12

HL
95.0
95.0
95.0
0.00
0.000
95.00
-1.08
-1.39

HP
101.0
100.0
89.0
6.66
1.795
96.67
-0.50
-0.81

HX
97.0
94.0
95.0
1.53
0.354
95.33
-0.97
-1.27

I
97.0
97.0
97.0
0.00
0.000
97.00
-0.39
-0.69

J
97.0
98.0
97.0
0.58
0.118
97.33
-0.27
-0.58

«JE
104.0
106.0
108.0
2.00
0.473
106.00
2.73
2.42

JG
96.0
97.0
102.0
3.21
0.709
98.33
0.07
-0.23

JM
101.0
100.0
99.0
1.00
0.236
100.00
0.65
0.35

JS
100.0
99.0
98.0
1.00
0.236
99.00
0.30
0.00

JY
116.0
114.0
97.0
10.44
3.371
109.00
3.77
3.46
rr
K
95.0
91.0
88.0
3.51
0.827
91.33
-2.35
-2.66

KH
105.0
103.0
103.0
1.15
0.236
103.67
1.92
1.62

KL
97.0
95.0
95.0
1.15
0.236
95.67
-0.85
-1.15

KX
99.0
94.0
97.0
2.52
0.591
96.67
-0.50
-0.81

L
103.0
104.0
105.0
1.00
0.236
104.00
2.04
1.73

LE
102.0
100.0
98.0
2.00
0.473
100.00
0.65
0.35

LF
99.0
97.0
100.0
1.53
0.354
98.67
0.19
-0.12

LR
97.0
98.0
97.0
0.58
0.118
97.33
-0.27
-0.58

LT
96.0
102.0
94.0
4.16
0.945
97.33
-0.27
-0.58

M
23:0
25.0
24.0
too
0.236
24.00
2568
-Z5.H8
8?
MP
94.0
95.0
92.0
1.53
0.354
93.67
-1.54
-1.85

MV
99.0
100.0
100.0
0.58
0.118
99.67
0.54
0.23

MX
96.0
90.0
99.0
4.58
1.120
95.00
-1.08
-1.39

N
98.0
102.0
104.0
3.06
0.709
101.33
1.11
0.81

NH
93.0
96.0
94.0
1.53
0.354
94.33
-1.31
-1.62

NJ
95.0
95.0
96.0
0.58
0.118
95.33
-0.97
-1.27

NK
90.0
89.0
93.0
2.08
0.473
90.67
-2.58
-2.89

NO
106.0
109.0
112.0
3.00
0.709
109.00
3.77
3.46
tr
NP








•
O
107.0
108.0
107.0
0.58
0.118
107.33
3.19
2.89

OA
94.0
97.0
96.0
1.53
0.354
95.67
-0.85
-1.15

OB
780.0
804.0
836.0
28.10
11696
806,67
M&4S:,
246;14-

OBL








¦»:
OM









OT
103.0
96.0
108.0
6.03
1.795
102.33
1.46
1.15

• = No data submitted TAG SYMBOLS 1T 3 Above control limit
0 s Insufficient data	x = Determined to be an outlier	II = Below control limit
-------
6/37
CRI>-LV Performance RvnliiaHnn: damma in Wfltfr
7-Jun-1906

	ll
Cobalt- 60







,
— ¦ ¦ ... ./
Lab
Res. 1
Rea. 2

Exper.
Rng anal

Normalized deviation

Res. 3
Sigma
(R + SR)
Average
(grand-avg)
(known) Tng
P
52,0
81.0
57.0
4.51
1.120
56.67
-14.36
•14.06
X
PB
98.0
98.0
100.0
1.15
0.236
98.67
0.19
-0.12

PE








PM
99.0
101.0
102.0
1.53
0.354
100.67
0.88
0.58

PQ
864.0
867,0
860.0
8.61
2.020
860.33
284.04
263.73
K
PU







•
PV
104.0
106.0
101.0
2.52
0.591
103.67
1.92
1.62

PW
94.0
97.0
93.0
2.08
0.473
94.67
-1.20
-1.50

PX
95.0
96.0
98.0
1.53
0.354
96.33
-0.62
-0.92

Q
98.0
99.0
100.0
1.00
0.236
99.00
0.30
0.00

QJ









QM
84.0
74.0
81.0
5.13
1.345
79.67
-6.39
-6.70
#
QP
93.0
92.0
92.0
0.58
0.118
92.33
-2.00
-2.31

QT
81.0
81.0
82.0
0.58
0.118
81.33
-5.82
-6.12
ti-
QU
110.0
114.0
112.0
2.00
0.473
112.00
4.81
4.50
lt
QW
113.0
111.0
112.0
1.00
0.236
112.00
4.81
4.50
it
QX
103.0
103.0
103.0
0.00
0.000
103.00
1.69
1.39

QZ
98.0
98.0
98.0
0.00
0.000
98.00
-0.04
-0.35

R
98.0
96.0
97.0
1.00
0.236
97.00
-0.39
-0.69

RF
91.0
92.0
92.0
0.58
0.118
91.67
-2.24
-2.54

RH
84.0
89,0
90.0
3,21
0.709
87.67
-3.62
-3.93
u
RK
95.0
99.0
97.0
2.00
0.473
97.00
-0.39
-0.69

RO
101.0
102.0
101.0
0.58
0.118
101.33
1.11
0.81

RR
98.0
97.0
97.0
0.58
0.118
97.33
-0.27
-0.58

RU
100.0
96.0
100.0
2.31
0.473
98.67
0.19
-0.12

RX
103.0
98.0
100.0
2.52
0.591
100.33
0.77
0.46

RZ
49.0
48.0
48.0
0.58
0.118
48.33
-17,25
-17.55

S
96.0
98.0
950
1.53
0.354
96.33
-0.62
-0.92

sc
88.0
92,0
93.0
2.65
0.591
91.00
-2.47
-2.77

SD
101.0
99.0
100.0
1.00
0.236
100.00
0.65
0.35

SF
88.0
99.0
100.0
6.66
1.795
95.67
-0.85
-1.15

SI
95.0
98.0
102.0
3.51
0.827
98.33
0.07
-0.23

SM
107.0
102.0
105.0
2.52
0.591
104.67
2.27
1.96

SN









SR
99.0
98.0
97.0
1.00
0.236
98.00
-0.04
-0.35

ss
102.0
101.0
104.0
1.53
0.354
102.33
1.46
1.15

ST








A
sv
98.0
98.0
100.0
1.15
0.236
98.67
0.19
-0.12

sx
98.0
95.0
98.0
1.73
0.354
97.00
-0.39
-0.69

sz
103.0
102.0
95.0
4.36
0.945
100.00
0.65
0.35

T
92.0
93.0
93.0
0.58
0.118
92.67
-1.89
-2.19

TC
113.0
112.0
108.0
2.65
0.591
111.00
4.46
4.16
ft
TD
97.0
100.0
93.0
3.51
0,827
96.67
-0.50
-0.81

TH








¦
TL








•
• s No data submitted TAG SYMBOLS ft = Above control limit
0 = Insufficient data	x = Determined to be an outlier	li g Below control limit ,
-------
CRD-LV Performance Evaluation: Gamma in Water, 7-Jun-1996
7/37
Cobalt-60
Lab Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
<
Normalized deviation
(grand-avg) (known) Tag
TO







-
~ . .
TQ
83.0
86.0
88.0
2.52
0.591
85.67
-4.31
-4.62
U
TR







i "
TS








<.•£> ¦
U
102.0
101.0
98.0
2.08
0.473
100.33
0.77
0.46

UE.








— ?
a. *
m:








v \
UP
91.0
93.0
88.0
2.52
0.591
90.67
-2.58
-2.89 ~

UR
105.0
95.0
96.0
5.51
1.345
98.67
0.19
-0.12

UP








.
uv
97.0
99.0
100.0
1.53
0.354
98.67
0.19
-0.12

ux
92.0
92.0
91.0
0.58
0.118
91.67
-2.24
-2.54

VA
101.0
100.0
102.0
1.00
0.236
101.00
1.00
0.69

VC
106.0
105.0
104.0
1.00
0.236
105.00
2.38
2.08

VE
846.0'
846 0
841.0
2.65
0.591
844i00
is&Ml
268;0r
X
VH
92.0
90.0
95.0
2.52
0.591
92.33
-2.00
2.31

VI
91.0
95.0
96.0
2.65
0.591
94.00
-1.43
-1.73

VM
82.0
100.0
100.0
10.39
3.146
94.00
-1.43
-1.73

VO
92.0
102.0
101.0
5.51
1.345
98.33
0.07
-0.23

vs
101.0
99.0
97.0
2.00
0.473
99.00
0.30
0.00

w
95.0
93.0
91.0
2.00
0.473
93.00
-1.77
-2.08

WD
99.0
99.0
99.0
0.00
0.000
99.00
0.30
0.00

WF









WI
94.0
85.0
80.0
7.09
2.245
86.33
-4.08
-4.39
"i
WJ
101.0
99.0
97.0
2.00
0.473
99.00
0.30
0.00

WK
95.0
84.0
93.0
5.86
1.570
90.67
-2.58
-2.89

WO
117.0
116.0
112.0
2.65
0.591
115.00
5.85
5.54
ft
WR
95.0
96.0
98.0
1.53
0.354
96.33
-0.62
-0.92

WS







<

WV









WW








¦
X
101.0
103.0
107.0
3.06
0.709
103.67
1.92
1.62

Data sorted by Laboratory Average
Average
Tag
Lab
Average
Tag
Lab
Average
Tag
Lab
24.00
X
M
89.67
4i
AL
92.33

QP
32.67
X
AH
90.33

FZ
92.67

T
48.33
X
RZ
90.67

WK
93.00

W
56.67
X
P
90.67

UP
93.00

DT
79.67
J1
QM
90.67

NK
93.33

EA
81.33
41
QT
91.00

SC
93.67

MP
85.67
41
TQ
91.33

K
94.00

VM
86.33
41
WI
91.67

UX
94.00

VI
87.67
4L
RH
91.67

RF
94.33

NH
89.33
U
BC
92.33

VH
94.33

EX
• = No data submitted
0 = Insufficient data
TAG SYMBOLS
x s Determined to be an outlier
ft = Above control limit
U = Below control limit
-------
8'	CRD-LV Performance Evaluation: Gamma in Water, 7-Jun-1996
Cobalt-60
Data sorted by Lnbomtory Average
Average
Tag
Lab
Average
Tag
Lab
Average
Tag
Lab
94.67

PW
97.67

HI
101.00

VA
94.67

GI
97.67

GL
101.33

RO
94.67

A
97.67

CX
101.33

N
95.00

MX
98.00

SR
101.33

AW
95.00

HL
98.00

QZ
101.67

DR
95.00

CS
98.00

DH
102.00

AP
95.33

NJ
98.33

VO
102.33

SS
95.33

HX
98.33

SI
102.33

OT
95.67

SF
98.33

JG
103.00

QX
95.67

OA
98.67

UV
103.00

BH
95.67

KL
98.67

UR
103.67

X
95.67

AJ
98.67

sv
103.67

PV
96.00

EL
98.67

RU
103.67

KH
96.00

E
98.67

PB
103.67

AZ
96.00

BO
98.67

LF
104.00

L
96.00

AE
98.67

HK
104.33

BB
96.33

WR
98.67

AI
104.33

BA
96.33

S
99.00

WJ
104.67

SM
96.33

PX
99.00

WD
104.67

BK
96.33

EB
99.00

vs
105.00

VC
96.33

DD
99.00

Q
105.00

DO
96.67

TD
99.00

JS
105.00

CE
96.67

KX
99.00

CO
106.00

JE
96.67

HP
99.00

CJ
107.33

O
96.67

EW
99.00

BL
108.67
IT
AY
96.67

DE
99.67

MY
109.00
IT
NO
97.00

SX
99.67

FJ
109.00
IT
JY
97.00

RK
100.00

SZ
109.00
IT
CM
97.00

R
100.00

SD
111.00
ft
TC
97.00

I
100.00

LE
112.00
1T
QW
97.00

CA
100.00

JM
112.00
IT
QU
97.33

RR
100.00

AF
115.00
tr
WO
97.33

LT
100.33

U
125.00
X
GQ
97.33

LR
100.33

RX
197.00
X
CC
97.33

J
100.33

FL
806.67
X
OB
97.33

BM
100.33

C
844.00
X
VE
97.33

AU
100.33

BN
860.33
X
PQ



100.67

PM
868.67
X
D
• = No data submitted	TAG SYMBOLS	IT s Above control limit
0 = Insufficient data	x = Determined to be an outlier	U = Below control limit J
-------
	 ^
CRD-LV Performance Evaluation: Gamma in Water, 7-Jun-1996	9/37
Cobalt-60
% responding labs	Frequency distribution
a
¦Bf
¦¦f _ _ ¦ _ ,
-6	-4	-2	0+2+4
Normalized deviation of the mean from the known value
% responding labs	Frequency distribution
T	- - -¦ - ¦ - i
-2	0+2+4+6
-6	-4
Normalized deviation of the mean from the grand average

-------
CRD-LV Performance Evaluation: Gamma in Water, 7-Jun-1996
10/37
Zinc-65	Statistical Summary	167 Participants
The known value of this nuclide is 300.0 pCi/1 with an expected precision of 30.0; the control limits
are 248.0 to 352.0; the warning regions are 248.0 to 265.3 and 334.7 to 352.0
28(15.6 %) Failed to respond ¦
• 121 (72.5 %) Within all limits

10(6.0 %) Outliers*' ; \K.


1(0.6 %) Out of control *

***9(5.4 %) In warning zone
but not an outlier
i
but within control
Statistic
Respondents
Non-outliers
Mean
361.47
Grand Arg 309.37
Std. Dev.
360.48
17.49
Variance
129947.97
306.00
% Coef. of Var.
99.73
5.65
% deviation of mean from known value
20.49
3.12
Norm. dev. of mean from known value
0.17
0.64
Median
310.33
310.33
% deviation of median from known value
3.44
3.44
Norm. dev. of median from known value
0.03
0.59
12(8.5 %).More than 3 norm. S.D.
8(5.7 %) Between 2 and 3 norm. S.D.
,80(56.7 %) Within 1 norm. S.O.
of known value
1 and 2 norm. S.D.
-------
Hi 31 CRD-LV Performance Evaluation: Gamma in Water,
7-Jun-19B6
		
r
Zinc-65






		S.
Lab
Res. 1
Res. 2

Exper.
Rng anal

Normalized deviation
Res. 3
Sigma
(R + SR}
Average
(grand-avg)
(known) Tag
A
319.0
314.0
314.0
2.89
0.098
315.67
0.36
0.90
AE
311.0
306.0
302.0
4.51
0.177
306.33
-0.18
0.37
AF
316.0
320.0
317.0
2.08
0.079
317.67
0.48
1.02
AH







*;
AI
289.0
282.0
290.0
4.36
0.158
287.00
-1.29
-0.75
AJ
308.0
310.0
299.0
5.86
0.217
305.67
-0.21
0.33
AK







¦
AL
308.0
319.0
303.0
8.19
0.315
310.00
0.04
0.58
AP
315.0
318.0
318.0
1.73
0.059
317.00
0.44
0.98
AU
290.0
290.0
293.0
1.73
0.059
291.00
-1.06
-0.52
AW
302.0
297.0
306.0
4.51
0.177
301.67
-0.44
0.10
AY
333.0
343.0
331.0
6.43
0.236
335.67
1.52
2.06
AZ
309.0
321.0
306.0
7.94
0.295
312.00
0.15
0.69
BA
299.0
314.0
333.0
17.04
0.669
315.33
0.34
0.89
BB
336.0
334.0
328.0
4.16
0.158
332.67
1.34
1.89
BC
299.0
291.0
286.0
6.56
0.256
292.00
-1.00
-0.46
BG







•
BH
326.0
332.0
334.0
4.16
0.158
330.67
1.23
1.77
BK
357.0
355.0
356.0
1.00
0.039
356.00
2.69
3.23 ft
BL
309.0
311.0
311.0
1.15
0.039
310.33
0,06
0.60
BM
313.0
313.0
311.0
1.16
0.039
312.33
0.17
0.71
BN
306,0
306.0
287.0
10.69
0.374
299.33
-0.58
-0.04
BO
300.0
310.0
330.0
15.28
0.591
313.33
0.23
0.77
BW







«» i
C
290.0
280.0
300.0
10.00
0.394
290.00
-1.12
-0.58
CA
291.0
300.0
303.0
6.24
0.236
298.00
-0.66
-0.12
CC
633.0
618.0
628.0
7.64
0.296
626,33
18.30
18:84 *
CE
317.0
334.0
338.0
11.15
0.413
329.67
1.17
1.71
CJ
310.0
307.0
311.0
2.08
0.079
309.33
0.00
0.54
CM
320.0
283.0
315.0
20.07
0.728
306.00
-0.19
0.35
CO
311.0
317.0
328.0
8.62
0.335
318.67
0.54
1.08
cs
318.0
326.0
321.0
4.04
0.158
321.67
0.71
1.25
cx
307.0
299.0
3190
10.07
0.394
308.33
-0.06
0.48
1 D
2635.0
293&0
2833.0
102.98
10.384
2601.33
143.87
144.41 X
DD
311.0
315.0
309.0
3.06
0.118
311.67
0.13
0.67
OE
301.0
302.0
303.0
1.00
0.039
302.00
-0.43
0.12
OH
292.0
296.0
289.0
3.51
0.138
292.33
-0.98
-0.44
DO
341.0
323.0
319.0
11.72
0.433
327.67
1.06
1.60
DR
316.0
324.0
316.0
4.62
0.158
318.67
0.54
1.08
DT
310.0
280.0
314.0
18.58
0.669
301.33
-0.46
0.08
DZ







:
E
297.0
306.0
302,0
4.51
0.177
301.67
-0.44
0.10
EA
288.0
285.0
289.0
2.08
0.079
287.33
-1.27
-0.73
EB
320.0
314.0
320.0
3.46
0.118
318.00
0.50
1.04
EL
307.0
307.0
296.0
6.35
0.217
303.33
-0.35
0.19
• S
No data submitted

TAG SYMBOLS

IT s Above control limit
fa
in
Insufficient data
x s
Determined to be an outlier
li s Below control limit
-------
CRD-LV Performance Evaluation: Gamma in Water, 7-Jun-1996	12137
===================================—>
Zinc-85
Lab Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rug anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known) Tag"
EW
297.0
300.0
291.0
4.58
0.177
296.00
-0.77
-0.23
EX
302.0
282.0
295.0
10.15
0.394
293.00
-0.95
-0.40
FJ
328.0
339.0
313.0
13.05
0.512
326.67
1.00
1.54
FL
329.0
307.0
323.0
11.37
0.433
319.67
0.59
1.14
FZ
289.0
278.0
282.0
5.57
0.217
283.00
-1.52
-0.98
GI
314.0
305.0
314.0
5.20
0.177
311.00
0.09
0.64
GL
316.0
347.0
329.0
15.57
0.610
330.67
1.23
1.77
GQ
399,0
399.0
399.0
0.00
0.000
399.00
6,17
5.72 x
HI
310.0
310.0
309.0
0.58
0.020
309.67
0.02
0.56
HK
316.0
321.0
311.0
5.00
0.197
316.00
0.38
0.92
HL
307.0
307.0
307.0
0.00
0.000
307.00
-0.14
0.40
HP
333.0
307.0
316.0
13.20
0.512
318.67
0.54
1.08
HX
315.0
302.0
310.0
6.56
0.256
309.00
-0.02
0.52
I
294.0
292.0
296,0
2.00
0.079
294.00
-0.89
-0.35
J
312.0
309.0
314.0
2.52
0.098
311.67
0.13
0.67
JE
306.0
329.0
325.0
12.29
0.453
320.00
0.61
1.15
JG
297.0
298.0
273.0
14.15
0.492
289.33
-1.16
-0.62
JM
324.0
322.0
322.0
1.15
0.039
322.67
0.77
1.31
JS
312.0
313.0
319.0
3.79
0.138
314.67
0.31
0.85
JY
338.0
342.0
345.0
3.51
0.138
341.67
1.86
2.41
K
278.0
293.0
296.0
9.64
0.354
289.00
-1.18
-0.64
KH
300.0
294.0
295.0
3.21
0.118
296.33
-0.75
-0.21
KL
292.0
300.0
305.0
6.56
0.256
299.00
-0.60
-0.06
KX
303.0
297.0
307.0
5.03
0.197
302.33
-0.41
0.13
L
306.0
308.0
308.0
1.15
0.039
307.33
-0.12
0.42
LE
332.0
321.0
322.0
6.08
0.217
325.00
0.90
1.44
LF
320.0
330.0
330.0
5.77
0.197
326.67
1.00
1.54
LR
319.0
330.0
306.0
12.01
0.473
318.33
0.52
1.06
LT
313.0
335.0
313.0
12.70
0.433
320.33
0.63
1.17
H
77.0
87;0
80.0
5,13
0.197
6133
.13117
mm x
MP
281.0
294.0
300.0
9.71
0.374
291.67
-1.02
-0.48
MV
295.0
292.0
300.0
4.04
0.158
295.67
-0.79
-0.25
MX
267.0
272.0
255.0
8.74
0.335
264.67
-2.58
-2.04
N
323.0
316.0
313.0
5.13
0.197
317.33
0.46
1.00
NH
329.0
324.0
327.0
2.52
0.098
326.67
1.00
1.54
NJ
307.0
314.0
310.0
3.51
0.138
310.33
0.06
0.60
NK
320.0
311.0
281.0
20.42
0.768
304.00
-0.31
0.23
NO
297.0
309.0
319.0
11.02
0.433
308.33
-0.06
0.48
NP-








0
341.0
341.0
340.0
0.58
0.020
340.67
1.81
2.35
OA
300.0
300.0
300.0
0.00
0.000
300.00
-0.54
0.00
OB







*
OK







;«
OM








OT
316.0
316.0
313.0
1.73
0.059
315.00
0.32
0.87
• =
0 3
No data submitted
Insufficient data
x =
TAG SYMBOLS
Determined to be an outlier
ft s Above control limit
U 3 Below control limit
-------
v	
13/37
DRD-LV Performance Evaluation: Gamma in Water,
7-Jun-1996


Zinc-65







>
Lab
Rea. 1
Res. 2
Res. 3
Exper.
Rng anal

Normalized deviation

Sigma
fR + SR)
Average
(grand-avg)
(known) Toe
R
19610
199.0
1940
2.66
0.09ft"
196,00

&00
m
PB
302.0
299.0
298.0
2.08
0.079
299.67
-0.56
-0.02

PE







•
PM
324.0
335.0
325.0
6.08
0.217
328.00
1.08
1.62

PQ
2814.0
2780.0
2772.0
22.30
0.827
2788.67
143.14
143.66
*
PU








•3
PV
306.0
325.0
330.0
12.66
0.473
320.33
0.63
1.17

PW
308.0
301.0
309.0
4.36
0.158
306.00
-0.19
0.35

PX
289.0
290.0
289.0
0.58
0.020
289.33
-1.16
-0.62

Q
312.0
322.0
326.0
7.21
0.276
320.00
0.61
1.15

QJ








•:
QM
219.0.
258.0
250.0
20.60
0.768.
242.33
-3.87
-3.33
*'
QP
276.0
281.0
272.0
4.51
0.177
276.33
-1.91
-1.37

QT
263.0
261.0
279.0
9.87
0.354
267.67
-2.41
-1.87

QU
350.0
348.0
346.0
2.00
0.079
348.00
2.23
2.77

QW
348.0
356.0
340.0
8.00
0.315
348.00
2.23
2.77

QX
323.0
324.0
329.0
3.21
0.118
325.33
0.92
1.46

QZ
321.0
320.0
322.0
1.00
0.039
321.00
0.67
1.21

R
321.0
314.0
317.0
3.51
0.138
317.33
0.46
1.00

RF
305.0
303.0
305.0
1.15
0.039
304.33
-0.29
0.25

RH
281.0
279.0
275.0
3.06
0.118
278.33
-1.79
-1.25

RK
278.0
291.0
285.0
6.51
0.256
284.67
-1.43
-0.89

RO
327.0
336.0
323.0
6.66
0.256
328.67
1.11
1.66

RR
313.0
303.0
303.0
5.77
0.197
306.33
-0.18
0.37

RU
309.0
310.0
319.0
5.51
0.197
312.67
0.19
0.73

RX
323.0
300.0
316.0
11.79
0.453
313.00
0.21
0.75

RZ
166.0
-160;0
160.0
3.46
0.118
162.00
-8.51
*7.97
%
S
305.0
302.0
299.0
3.00
0.118
302.00
-0.43
0.12

sc
312.0
297.0
313.0
8.96
0.315
307.33
-0.12
0.42

SD
326.0
315.0
297.0
14.64
0.571
312.67
0.19
0.73

SF
320.0
340.0
300.0
20.00
0.788
320.00
0.61
1.15

SI
313.0
296.0
316.0
10.79
0.394
308.33
-0.06
0.48

SM
338.0
331.0
331.0
4.04
0.138
333.33
1.38
1.92

SN









SR
307.0
314.0
295.0
9.61
0.374
305.33
-0.23
0.31

ss
321.0.
324.0
326.0
2.52
0.098
323.67
0.83
1.37

ST








~
sv
321.0
325.0
324.0
2.08
0.079
323.33
0.81
1.35

sx
319.0
309.0
316.0
5.13
0.197
314.67
0.31
0.85

sz
323.0
327.0
306.0
11.15
0.413
318.67
0.54
1.08

T
317.0
291.0
318.0
15.31
0.532
308.67
-0.04
0.50

TC
408.0
405.0
ass.o
30.92
1.158
388.67
4.58
5,12
*1
TD
298.0
275.0
298.0
13.28
0.453
290.33
-1.10
-0.56

TH








*
TL









• 3
No data submitted

TAG SYMBOLS

ft = Above control limit
in
Insufficient data
x =
Determined to be an outlier
U s Below control limit
			/J
-------
fr-
CRD-LV Performance Evaluation: Gamma in Water, 7-Jun-1996
14/37
Zwc-65
Lab
Res. 1
Res, 2

Exper.
Rag anal

Normalized deviation

Res. 3
Sigma
fR + SR)
Average
(grand-avg)
(known) Tag
IX)









TQ
260.0
300.0
302.0
23.69
0.827
287.33
-1.27
-0.73

TH








TS








&9&J-
U
311.0
310.0
310.0
0.58
0.020
310.33
0^06
0.60

UE









un;









UP
305.0
313.0
311.0
4.16
0.158
309.67
0.02
0.56
UR
341.0
308.0
330.0
16.80
0.650
326.33
0.98
1.52











uv
312.0
299.0
310.0
7.00
0.256
307.00
-0.14
0.40

ux
302.0
295.0
309.0
7.00
0.276
302.00
-0.43
0.12

VA
322.0
331.0
330.0
4.93
0.177
327.67
1.06
1.60

VC
333.0
334.0
334.0
0.58
0.020
333.67
1.40
1.94

:VB
274&0
2760.0
2760 0
11.65
0.394-
2753^
14i;lds

3ft p
VH
295,0
295.0
297.0
1.15
0.039
295.67
-0.79
-0.25

VI
344.0
330.0
337.0
7.00
0.276
337.00
1.60
2.14

VM
314.0
324.0
295.0
14.73
0.571
311.00
0.09
0.64

VO
290.0
318.0
317.0
15.89
0.551
308.33
-0.06
0.48

vs
307.0
301.0
313.0
6.00
0.236
307.00
-0.14
0.40

w
303.0
320.0
320.0
9.81
0.335
314.33
0.29
0.83

WD
303.0
315.0
279.0
18.33
0,709
299.00
-0.60
-0.06

WF









WI
332.0
256.0
278.0
39.11
1.945
288.67
¦1.20
-0.65

WJ
307.0
331.0
309.0
13.32
0.473
315.67
0.36
0.90

WK
279.0
291.0
275.0
8.33
0.315
281.67
-1.60
-1.06

WO
234.0
250.0
260.0
13.11
0.512
248.00
-3.54
-3.00

WR
261.0
252.0
248.0
6.66
0.256
253.67
-3.22
-2.68

WS









WV








46
WW








•!» v:-
X
324.0
315.0
321.0
4.58
0.177
320.00
0.61
1.15

Data sorted by Laboratory Average
Average
Tag
Lab
Average Tad
Lab
Average
Tag
Lab
81.33
X
M
281.67
WK
290.00

G
162.00
X
RZ
283.00
FZ
290-33

TO
196.00
X
P
284.67
RK
291.00

ATJ
242.33
X
QM
287.00
AI
291.67

MP
248.00

WO
287.33
TQ
292.00

BC
253.67

WR
287.33
EA
292.33

DH
264.67

MX
288.67
WI
293.00

EX
267.67

QT
289.00
K
294.00

I
276.33

QP
289.33
PX
295.67

VH
278.33

RH
289.33
JG
295.67

MV
• s No data submitted
0 s Insufficient data

TAG SYMBOLS
x s Determined to be an outlier
tr
s Above control limit
= Below control limit
-------
15/37	CRD-LV Performance Evaluation: Gamma in Water, 7-Jun-1996
V		
Zinc-65
Datn sorted by Tinhorntory Average
Average
Tax
Lab
Average
Tag
Lab
Average
Tag
Lab
296.00

EW
309.67

HI
320.00

JE
296.33

KH
310.00

AL
320.33

PV
298.00

CA
310.33

U
320.33

LT
299.00

WD
310.33

NJ
321.00

QZ
299.00

KL
310.33

BL
321.67

CS
299.33

BN
311.00

VM
322.67

JM
299.67

PB
311.00

GI
323.33

sv
300.00

OA
311.67

J
323.67

ss
301.33

DT
311.67

DD
325.00

LE
301.67

E
312.00

AZ
325.33

QX
301.67

AW
312.33

BM
326.33

UR
302.00

UX
312.67

SD
326.67

NH
302.00

S
312.67

RU
326.67

LF
302.00

DE
313.00

RX
326.67

FJ
302.33

KX
313.33

BO
327.67

VA
303.33

EL
314.33

W
327.67

DO
304.00

NK
314.67

SX
328.00

PM
304.33

RF
314.67

JS
328.67

RO
305.33

SR
315.00

OT
329.67

CE
305.67

AJ
315.33

BA
330.67

GL
306.00

PW
315.67

WJ
330.67

BH
306.00

CM
315.67

A
332.67

BB
306.33

RR
316.00

HK
333.33

SM
306.33

AE
317.00

AP
333.67

VC
307.00

VS
317.33

R
335.67

AY
307.00

uv
317.33

N
337.00

VI
307.00

HL
317.67

AF
340.67

O
307.33

sc
318.00

EB
341.67

JY
307.33

L
318.33

LR
348.00

QW
308.33

VO
318.67

SZ
348.00

QU
308.33

SI
318.67

HP
356.00
ir
BK
308.33

NO
318.67

DR
388.67
X
TC
308.33

CX
318.67

CO
399.00
X
GQ
308.67

T
319.67

FL
626.33
X
CC
309.00

HX
320.00

X
2753.33
X
VE
309.33

CJ
320.00

SF
2788.67
X
PQ
309.67

UP
320.00

Q
2801.33
X
D
. = No data submitted	TAG SYMBOLS	ft = Above control limit
0 a Inefficient data	x = Determined to be an outlier	= Below control ligut_j
-------
CRD-LV Performance Evaluation: Gamma in Water, 7-Jun-1996	16 / 37
Zinc-65
% responding labs	Frequency distribution.
10	
.¦infiHijuii
0 T »	— t ~ T"	* m l ~i	- ~,
-6	-4	-2	0	+2	+4	+6
Normalized deviation of the mean from the known value
% responding labs	Frequency distribution			
10-
*T

-6	-4-2	0+2+4+6
Normalized deviation of the mean from the grand average
-------
CRD-LV Performance Evaluation: Gamma in Water, 7-Jun-1996
17/37
Cesium-134	Statistical Summary	167 Participants
The known value of this nuclide is 79.0 pCi/l with an expected precision of 5.0; the control limits
are 70.3 to 87.7; the warning regions are 70.3 to 73.2 and 84.8 to 87.7
25(15.0 %) Failed to respond «
9(5.4 %) Outliers '
37(22.2 %) Out of control •
but not an outlier
Statistic
» 58(34.7 %) Within all limits
Respondents
--38(22.8 %) In warning zone
but within control
Non-outliers
Mean
Std. Dev.
Variance
% Coef. of Var.
% deviation of mean from known value
Norm. dev. of mean from known value
Median
% deviation of median from known value
Norm. dev. of median from known value
89.18
Grand Avg 72.92
99.44
5.50
9887.39
30.21
111.50
7.54
12.88
-7.70
0.10
-1.11
72.67
72.67
-8.02
-8.02
-0.06
-1.15
-------
ft - ¦ — 		*	:		—
18 / 37 CRD-LV Performance Evaluation: Gamma in Water,
7-Jun-1996

"
Cesium-134







-
Lab
Res. 1
Res. 2

Exper.
Rng anal

Normalized deviation

Res. 3
Sigma
(R + SR)
Average
(grand-avg)
(known) Tag
A
72.0
67.0
65.0
3.61
0.827
68.00
-1.70
-3.81
ft
AE
72.0
76.0
72.0
2.31
0.473
73.33
0.14
-1.96

AF
74.0
74.0
67.0
4.04
0.827
71.67
-0.43
-2.54

AH
45 0
60.0
46.0
2.66
0,591
47.00
¦8l98
41.091
Xi
AI
66.0
67.0
69.0
1.53
0.354
67.33
-1.93
-4.04
ft
AJ
59.0
68.0
64.0
4.51
1.120
63.67
-3.20
-5.31
ft
AK









AL
79.0
83.0
85.0
3.06
0.709
82.33
3.26
1.15

AP
73.0
78.0
79.0
3.21
0.709
76.67
1.30
-0.81

AU
72.0
66.0
72.0
3.46
0.709
70.00
-1.01
-3.12
ft
AW
71.0
72.0
72.0
0.58
0.118
71.67
-0.43
-2.54

AY
85.0
87.0
88.0
1.53
0.354
86.67
4.76
2.66

AZ
76.0
77.0
76.0
0.58
0.118
76.33
1.18
-0.92

BA
76.0
84.0
78.0
4.16
0.945
79.33
2.22
0.12

BB
76.0
75.0
82.0
3.79
0.827
77.67
1.65
-0.46

BC
77.0
80.0
76.0
2.08
0.473
77.67
1.65
-0.46

BG








I
$ '
BH
78.0
81.0
78.0
1.73
U.354
79.00
2.11
0.00

BK
87.0
86.0
86.0
0.58
0.118
86.33
4.65
2.54

BL
71.0
72.0
72.0
0.58
0.118
71.67
-0.43
-2.54

BM
81.0
79.0
78.0
1.53
0.354
79.33
2.22
0.12

BN
73.0
74.0
73.0
0.58
0.118
73.33
0.14
-1.96

BO
70.0
69.0
68.0
1.00
0.236
69.00
-1.36
-3.46
ft
BW








•
C
72.0
76.0
73.0
2.08
0.473
73.67
0.26
-1.86

CA
73.0
71.0
73.0
1.15
0.236
72.33
-0.20
-2.31

CC
144.0
146.0
148.0
2.00
0.473
146,00
25.32
23i21
J*""? *
CE
78.0
79.0
80.0
1.00
0.236
79^00
2.11
0.00

CJ
71.0
68.0
70.0
1.53
0.354
69.67
-1.13
-3.23
ft
CM
75.0
72.0
79.0
3.51
0.827
75.33
0.84
-1.27

CO
70.0
71.0
75.0
2.65
0.591
72.00
-0.32
-2.42

cs
74.0
71.0
76.0
2.52
0.591
73.67
0.26
-1.85

cx
72.0
71.0
74.0
1.53
0.354
72.33
-0.20
-2.31

D
636.0
632.0
676.0
24.58
8.996
647.67
199.10
196.99
* i
DD
78.0
78.0
75.0
1.73
0.354
77.00
1.41
-0.69

DE
71.0
72.0
72.0
0.58
0.118
71.67
-0.43
-2.54

DH
77.0
76.0
76.0
0.58
0.118
76.33
1.18
-0.92

DO
77.0
75.0
80.0
2.52
0.591
77.33
1.53
-0.58

DR
73.0
68.0
70.0
2.52
0.591
70.33
-0.90
-3.00

DT
71.0
72.0
75.0
2.08
0.473
72.67
-0.09
-2.19

DZ








1*1
, *>"
E
71.0
74.0
71.0
1.73
0.354
72.00
-0.32
-2.42

EA
79.0
78.0
78.0
0.58
0.118
78.33
1.88
-0.23
ft
EB
68,0
69.0
69.0
0.58
0.118
68.67
-1.47
-3.58
EL
77.0
78.0
74.0
2.08
0.473
76.33
1.18
-0.92

• s
No data submitted

TAG SYMBOLS

ft s Above control limit
0 s
^	
Insufficient data
X S
Determined to be an outlier
4 a Below control limit
-------
CRD-LV Performance Evaluation: Gamma in Water, 7-Jun-1996	19/37
Ceaium-134
Lab Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known)
\
Tag
EW
67.0
69.0
66.0
1.53
0.354
67.33
-1.93
-4.04
U
EX
67.0
68.0
74.0
3.79
0.827
69.67
-1.13
-3.23
U
FJ
77.0
73.0
79.0
3.06
0.709
76.33
1.18
-0.92

FL
77.0
70.0
77.0
4.04
0.827
74.67
0.61
-1.50

FZ
72.0
71.0
69.0
1.53
0.354
70.67
-0.78
-2.89

GI
72.0
66.0
66.0
3.46
0.709
68.00
-1.70
-3.81
a.
GL
64.0
69.0
65.0
2.65
0.591
66.00
-2.40
-4.50
u
GQ
73.0
73.0
73.0
0.00
0.000
73.00
0.03
-2.08

m
66.0
74.0
70.0
4.00
0.945
70.00
-1.01
-3.12
u
HK
74.0
74.0
75.0
0.58
0.118
74.33
0.49
-1.62

HL
74.0
80.0
75.0
3.21
0.709
76.33
1.18
-0.92

HP
81.0
74.0
74.0
4.04
0.827
76.33
1.18
-0.92

HX
70.0
66.0
68.0
2.00
0.473
68.00
-1.70
-3.81
j;
I
71.0
72.0
72.0
0.58
0.118
71.67
-0.43
-2.54

J
76.0
77.0
76.0
0.58
0.118
76.33
1.18
-0.92

JE
80.0
76.0
78.0
2.00
0.473
78.00
1.76
-0.35

JG
68.0
65.0
68.0
1.73
0.354
67.00
-2.05
-4.16
u
JM
75.0
75.0
75.0
0.00
0.000
75.00
0.72
-1.39

JS
73.0
74.0
72.0
1.00
0.236
73.00
0.03
-2.08

JY
75.0
90.0
76.0
8.39
2.470
80.33
2.57
0.46

K
83.0
82.0
82.0
0.58
0.118
82.33
3.26
1.15

KH
79.0
78.0
78.0
0.58
0.118
78.33
1.88
-0.23

KL
74.0
73.0
74.0
0.58
0.118
73.67
0.26
-1.85

EX
751.0
708:0
752.0
25.12
81996
737.00
230.04
227t94
:x
L
74.0
73.0
76.0
1.53
0.354
74.33
0.49
-1.62

LE
72.0
67.0
74.0
3.61
0.827
71.00
-0.66
-2.77

LF
75.0
75.0
76.0
0.58
0.118
75.33
0.84
-1.27

LR
69.0
64.0
71.0
3.61
0.827
68.00
-1.70
-3.81

LT
75.0
71.0
77.0
3.06
0.709
74.33
0.49
-1.62

M
24.0
25.0
24.0
0.58
0:118
24.33
-1683

X
MP
72.0
67.0
66.0
3.21
0.709
68.33
-1.59
-3.70
u
MV
70.0
71.0
70.0
0.58
0.118
70.33
-0.90
.3.00

MX
71.0
69.0
70.0
1.00
0.236
70.00
-1.01
-3.12
u
N
73.0
73.0
73.0
0.00
0.000
73.00
0.03
-2.08

NH
72.0
71.0
70.0
1.00
0.236
71.00
-0.66
-2.77

NJ
68.0
64.0
63.0
2.65
0.591
65.00
-2.74
-4.85

NK
66.0
72.0
73.0
3.79
0.827
70.33
-0.90
-3.00

NO
78.0
84.0
90.0
6.00
1.795
84.00
3.84
1.73

NP









O
78.0
78.U
78.0
0.00
0.000
78.00
1.76
-0.35

OA
69.0
68.0
71.0
1.53
0.354
69.33
-1.24
-3.35

OB









OK









OM









OT
72.0
71.0
77.0
3.21
0.709
73.33
0.14
-1.96

• s No data submitted	TAG SYMBOLS	ft a Above control limit
I 0 = Insufficient data	x s Determined to be an outlier	Ji a Below control limit
-------
1 20/37	CRD-LV Performance Evaluation: Gamma in Water, 7-J un-1996
Cesium-134
Lab
Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rag anal
-------
CRD-LV Performance Evaluation: Gamma in Water, 7-Jun-1996
21/37
Cesium-134
Lab Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known) Tag
TO








.0'
TQ
TR
65.0
64.0
63.0
1.00
0.236
64.00
-3.09
-5.20
II
TS








•
% .
U
82.0
80.0
78.0
2.00
0.473
80.00
2.45
0.35

UE







»'
UN








».
UP
60.0
67.0
58.0
4.73
1.120
61.67
-3.90
-6.00
11
UR
81.0
76.0
81.0
2.89
0.591
79.33
2.22
0.12

UT








UV
76.0
71.0
73.0
2.52
0.591
73.33
0.14
-1.96

UX
65.0
67.0
67.0
1.15
0.236
66.33
-2.28
-4.39
u
VA
76.0
76.0
79.0
1.73
0.354
77.00
1.41
-0.69

VC
75.0
76.0
75.0
0.58
0.118
75.33
0.84
-1.27

VE
609.0
647.0
664.0
Z4.Z1
9.221
836.67
196<29
193118!
>6
VH
61.0
64.0
63.0
1.53
0.354
62.67
-3.55
-5.66
II
VI
68.0
65.0
68.0
1.73
0.354
67.00
-2.05
-4.16
II
VM
74.0
77.0
79.0
2.52
0.591
76.67
1.30
-0.81

vo
65.0
73.0
77.0
6.11
1.795
71.67
-0.43
-2.54

vs
76.0
75.0
74.0
1.00
0.236
75.00
0.72
-1.39

w
72.0
73.0
70.0
1.53
0.354
71.67
-0.43
-2.54

WD
73.0
73.0
71.0
1.15
0.236
72.33
-0.20
-2.31

WP









WI
43.0
73.0
50.0
15.70
5.846
55.33
-6.09
-8.20
II
WJ
74.0
71.0
71.0
1.73
0.354
72.00
-0.32
-2.42

WK
64.0
70.0
70.0
3.46
0.709
68.00
-1.70
-3.81

WO
77.0
76.0
83.0
3.79
0.827
78.67
1.99
-0.12

WR
74.0
71.0
68.0
3.00
0.709
71.00
-0.66
-2.77

WS








V
WV








r:
WW








•
X
70.0
72.0
70.0
1.15
0.236
70.67
-0.78
-2.89

Data sorted by Laboratory Average
Average
Tag
Lab
Average
Tag
Lab
Average
Tag
Lab
24.33
X
M
64.00
II
TQ
67.33
II
TD
38.33
X
RZ
65.00
II
NJ
67.33
II
EW
42.67
X
P
65.33
II
SX
67.33
II
AI
47.00
X
AH
65.67
II
sc
67.67
II
RH
55.33
II
WI
66.00
II
GL
68.00
11
WK
56.00
II
QM
66.33
II
UX
68.00
II
LR
59.33
II
RK
67.00
II
VI
68.00
II
HX
61.67
II
UP
67.00
II
sv
68.00
II
GI
62.67
II
VH
67.00
II
QP
68.00
u .
A
63.67
II
AJ
67.00
II
JG
68.33
II
MP
• = No data submitted
0 s Insufficient data
TAG SYMBOLS
x = Determined to be an outlier
ft s Above control limit
•11 s Below control limit
-------
22/37
CRD-LV Performance Evaluation: Gamma in Water, 7-Jun-1996
Cesium-134
Data sorted by Laboratory Average
Average
Tag
Lab
Average
Tag
Lab
Average
Tag
Lab
68.67
U
EB
72.33

CX
76.33

DH
69.00
11
BO
72.33

CA
76.33

AZ
69.33
U
OA
72.67

QT
76.67

VM
69.67
U
RR
72.67

PW
76.67

AP
69.67

EX
72.67

DT
77.00

VA
69.67
4
CJ
73.00

N
77.00

DD
70.00
U
SF
73.00

JS
77.33

DO
70.00
U
MX
73.00

GQ
77.67

QX
70.00
U
HI
73.33

uv
77.67

BC
70.00
u
AU
73.33

OT
77.67

BB
70.33

PM
73.33

BN
78.00

QW
70.33

NK
73.33

AE
78.00

QU
70.33

MV
73.67

KL
78.00

PX
70.33

DR
73.67

CS
78.00

0
70.67

X
73.67

C
78.00

JE
70.67

RU
74.00

R
78.33

KH
70.67

FZ
74.33

LT
78.33

EA
71.00

WR
74.33

L
78.67

WO
71.00

NH
74.33

HK
79.00

CE
71.00

LE
74.67

SD
79.00

BH
71.33

SZ
74.67

Q
79.33

UR
71.33

RO
74.67

FL
79.33

BM
71.33

QZ
75.00

VS
79.33

BA
71.67

W
75.00

T
80.00

U
71.67

VO
75.00

S
80.33

JY
71.67

SR
75.00

RF
80.67

ss
71.67

I
75.00

PB
82.33

K
71.67

DE
75.00

JM
82.33

AL
71.67

BL
.75.33

VC
84.00

NO
71.67

AW
75.33

LF
85.33

RX
71.67

AF
75.33

CM
86.33

BK
72.00

WJ
75.67

SM
86.67

AY
72.00

PV
76.33

J
88.67
ft
TC
72.00

E
76.33

HP
146.00
X
CC
72.00

CO
76.33

HL
636.67
X
VE
72.33

WD
76.33

FJ
645.67
X
PQ
72.33

SI
76.33

EL
647.67
737.00
X
X
D
KX
• s No data submitted	TAG SYMBOLS	ft 3 Above control limit
(75 = Insufficient data	x = Determined to be an outlier	= Below control limit
-------
				J
CRD-LV Performance Evaluation: Gamma in Water, 7-Jun-1996	23/37
Cesium-134
responding labs 	Frequency distribution
10
,		-1- - i - 	[
-6	-4	-2	0	+2	+4	+6
Normalized deviation of the mean from the known value
% responding labs	Frequency distribution
10'

LdL
42	+4
Normalized deviation of the mean from the grand average
-------
CRD-LV Performance Evaluation: Gamma in Water, 7-Jun-1996
24/37
Ceaium-137	Statistical Summary	167 Participants
The known value of this nuclide is 197.0 pCi/1 -with an expected precision of 10.0; the control limits
are 179.7 to 214.3; the warning regions are 179.7 to 185.4 and 208.6 to 214.3
24(14.4- %) Failed to respond
• 95(56.9 %} Within all limits
1 u>y 		
12(7-2 %) Outdare * / NSc; /
** * • » >

13(7.8 %) Out of control*

**-23(13-8 %) In warning zona
but not an outlier
11
I
but within control
Statistic
Respondents
Non-outliere
Mean
241.49
Grand Avg 200.79
Std. Dev.
251.75
10.03
Variance
63379.15
100.68
% Coef. of Var.
104.25
5.00
% deviation of mean from known value
22.59
1.92
Norm. dev. of mean from known value
0.18
0.38
Median
200.67
200.33
% deviation of median from known value
1.86
1.69
Norm. dev. of median from known value
0.01
0.33
26(18.2 %) Mora than 3 norm. S.D, •,
22(15.4 °/o) Between 2 and 3 norm. S.D.*
, 54(37.0 %) Within 1 norm. S.D.
•	of known value
• 41(28.7 %) Between 1 and 2 norm. S.D.
-------
25 / 37	CRD-LV Performance Evaluation: Gamma in Water, 7-Jun-lB96
r~""		- =?:-¦¦ ¦¦—- 	: _	, 	
Cesium-137
Lab
Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-av-g) (known) Tag
A
199.0
197.0
192.0
3,61
0.413
196.00
-0.83
-0.17
AE
200.0
196.0
196.0
2.31
0.236
197.33
-0.60
0.06
AF
209.0
200.0
200.0
5.20
0.532
203.00
oa«
1.04
AH
49.0
66.0
56.0
3.79
0.413
53.33
•26.64
-24.88 X
A1
195.0
191.0
195.0
2.31
0.236
193.67
-1.23
-0.58
AJ
193.0
204.0
202.0
5.86
0.650
199.67
-0.19
0.46
AK








AL
2vo.u
214.U
209.0
4.U4
0.473
209.67
1.54
2.19
AP
197.0
206.0
201.0
4.51
0.532
201.33
0.09
0,75
AU
199.0
198.0
195.0
2.08
0.236
197.33
-0.60
0.06
AW
192.0
191.0
191.0
0.58
0.059
191.33
-1.64
-0.98
AY
224.0
225.0
225.0
0.58
0.059
224.67
4.14
4.79 ft
AZ
200.0
206.0
197.0
4.58
0.532
201.00
0.04
0.69
BA
200.0
220.0
208.0
10.07
1.345
209.33
1.48
2.14
BB
205.0
203.0
205.0
1.15
0.118
204.33
0.61
1.27
BC
197.0
194.0
194.0
1.73
0.177
195.00
-1.00
-0.35
BG








BH
auti.u
209.0
210.0
2.WJ
0.236
208.33
1.31
1.96
BK
258.0
257.0
258.0
0.68
0.059
257.67
9.85
10.51 x
BL
197.0
191.0
193.0
3.06
0.354
193.67
-1.23
-0.58
BM
196.0
195.0
200.0
2.65
0.295
197.00
-0.66
0.00
BN
209.0
210.0
215.0
3.21
0.354
211,33
1.83
2.48
BO
200.0
200.0
200.0
0.00
0.000
200.00
-0.14
0.52
BW








C
197.0
194.0
194.0
1.73
0.177
195.00
-1.00
-0.35
CA
200.0
200.0
204.0
2.31
0.236
201.33
0.09
0.75
CC
395.0
400*0
400.0
2.89
0.295
398.33
3422
34;87 il
CE
215.0
216.0
220.0
2.65
0.295
217.00
2.81
3.46 ft
CJ
201.0
205.0
200.0
2.65
0.295
202.00
0.21
0.87
CM
197.0
196.0
194.0
1.53
0.177
195.67
-0.89
-0.23
CO
214.0
199.0
204.0
7,64
0.886
205.67
0.85
1.50
CS
211.0
212.0
212.0
0.58
0.059
211.67
1.88
2.54
CX
197.0
194.0
201.0
3.51
0.413
197.33
-0.60
0.06
D
1692.0
1731.0
1869.0
87.36
17.884
1760.67
270;18
270;83. x
DD
208.0
209.0
206.0
1.53
0.177
207.67
1.19
1.85
DE
196.0
196.0
197.0
0.58
0.059
196.33
-0.77
-0.12
DH
206.0
199.0
206.0
4.04
0.413
203.67
0.50
1.15
DO
216.0
209.0
209.0
4.04
0.413
211.33
1.83
2.48
DR
205.0
205.0
205.0
0.00
0.000
205.00
0.73
1.39
DT
192.0
200.0
198.0
4.16
0.473
196.67
-0.71
-0.06
DZ








E
195.0
207.0
190.0
8.74
1.008
197.33
-0.60
0.06
EA
193.0
192.0
192.0
0.58
0.059
192.33
-1.46
-0.81
EB
204.0
203.0
203.0
0.58
0.059
203.33
0.44
1.10
EL
197.0
202.0
195.0
3.61
0.413
198.00
-0.48
0.17
(
 •
in I"
No data submitted
Insufficient data
x =
TAG SYMBOLS
Determined to be an outlier
ft a Above control limit
11 a Below control limit
-------

CRD-LV Performance Evaluation: Gamma in Water,
7-Jun-1996
	
26/37
Cesium-137








Lab
Res. 1
Res. 2
Res. 3
Exper.
Rng anal

Normalized deviation

Sigma
(R + SR)
Average
(grand-avg)
(known) Tag
EW
197.0
197.0
190.0
4.04
0.413
194.67
-1.06
-0.40

EX
175.0
189.0
176.0
7.81
0.827
180.00
-3.60
-2.94

FJ
196.0
198.0
199.0
1.53
0.177
197.67
-0.54
0.12

FL
219.0
202.0
218.0
9.54
1.008
213.00
2.12
2.77

FZ
178.0
178.0
173.0
2.89
0.295
176.33
-4.24
-3.58

GI
196.0
188.0
202.0
7.02
0.827
195.33
-0.94
-0.29

GL
195.0
202.0
197.0
3.61
0.413
198.00
-0.48
0.17

GQ
169.0
169.0
169.0
0.00
0.000
169.00
-5.51
-4.85
U
m
192.0
212.0
198.0
10.26
1.345
200.67
-0.02
0.64

HK
212.0
204.0
208.0
4.00
0.473
208.00
1.25
1.91

HL
206.0
209.0
206.0
1.73
0.177
207.00
1.08
1.73

HP
234.0
203.0
214.0
15.72
2.583
217.00
2.81
3.46
ir
HX
197.0
196.0
196.0
0.58
0.059
196.33
-0.77
-0.12

I
196.0
187.0
190.0
4.58
0.532
191.00
-1.70
-1.04

J
194.0
195.0
196.0
1.00
0.118
195.00
-1.00
-0.35

JE
198.0
199.0
201.0
1.53
0.177
199.33
-0.25
0.40

JG
201.0
204.0
192.0
6.24
0.709
199.00
-0.31
0.35

JM
210.0
212.0
212.0
1.15
0.118
211.33
1.83
2.48

JS
201.0
203.0
197.0
3.06
0.354
200.33
-0.08
0.58

JY
197.0
205.0
199.0
4.16
0.473
200.33
-0.08
0.58

K
218.0
220.0
219.0
1.00
0.118
219.00
3.15
3.81
it
KH
217.0
213.0
213.0
2.31
0.236
214.33
2.35
3.00

KL
204.0
205.0
205.0
0.58
0.059
204.67
0.67
1.33

KX
198.0
191.0
189.0
4.73
0.532
192.67
-1.41
-0.75

L
216.0
217.0
215.0
1.00
0.118
216.00
2.64
3.29
ft
LE
214.0
208.0
193.0
10.82
1.458
205.00
0.73
1.39

LF
210.0
200.0
210.0
5.77
0.591
206.67
1.02
1.67

LR
206.0
205.0
201.0
2.65
0.295
204.00
0.56
1.21

LT
205.0
205.0
201.0
2.31
0.236
203.67
0.50
1.15

M
5210
53.0
54.0
1.00
0118
B3;00
-25,60
mm
m :
MP
187.0
191.0
185.0
3.06
0.354
187.67
-2.27
-1.62

MV
207.0
205.0
211.0
3.06
0.354
207.67
1.19
1.85

MX
180.0
184.0
185.0
2.65
0.295
183.00
-3.08
-2.42

N
203.0
207.0
204.0
2.08
0.236
204.67
0.67
1.33

NH
219.0
216.0
217.0
1.53
0.177
217.33
2.87
3.52
ft
NJ
189.0
196.0
190.0
3.79
0.413
191.67
-1.58
-0.92

NK
198.0
198.0
190.0
4.62
0.473
195.33
-0.94
-0.29

NO
216.0
219.0
222.0
3.00
0.354
219.00
3.15
3.81
ft
Ntf









O
224.0
224.0
224.0
0.00
0.000
224.00
4.02
4.68
ft
OA
195.0
196.0
197.0
1.00
0.118
196.00
-0.83
-0.17

Oil
1650;0
16130
1634.0
18,56
3i258
1632.33
mm
mm

OK








f*
OM








4
OT
198.0
195.0
194.0
2.08
0.236
195.67
-0.89
-0.23

• 3
No data submitted

TAG SYMBOLS

ft = Above control limit
0 =
		
Insufficient data
x =
Determined to be an outlier
H s Below control limit
	JJ
-------
&
27/37 CRD-LV Performance Evaluation: Gamma in Water.
V *
7-Jitn-1996

	
Cesium-137








Lab
Res. 1
Res. 2
Res. 3
Exper.
Rag ana]

Normalized deviation

Sigma
(R + SR)
Average
(grand-avg)
(known) Tasr
P
121.0
113.0
114.0
4.36
0.473
116.00
-um
U4.03
X
PB
198.0
196.0
196.0
1.15
0.118
196.67
-0.71
-0.06

PE







•
PM
199,0
198.0
203.0
2.65
0.295
200.00
-0.14
0.52

PQ
1782.0
1797.0
1762.0
22,91
4.158
1777100
273.01
273.66
X
PU







•<
PV
202.0
203.0
204.Q
1.00
0.118
203.00
0.38
1.04

PW
201.0
202.0
197.0
2.65
0.295
200.00
-0.14
0.52

PX
186.0
186.0
183.0
1.73
0.177
185.00
-2.73
-2.08

Q
205.0
207.0
215.0
5.29
0.591
209.00
1.42
2.08

QJ








t
QM
167.0
164.0
167.0
i.73
0.177
166.00
-6.03
5J37
X
QP
196.0
184.0
184.0
6.93
0.709
188.00
-2.2L
-1,56

QT
203.0
205.0
206.0
1.53
0.177
204.67
0.67
1.33

QU
223.0
224.0
226.0
1.53
0.177
224.33
4.08
4.73
ft
QW
224.0
224.0
225.0
0.58
0.059
224.33
4.08
4.73
It
QX
211.0
207.0
206.0
2.65
0.295
208.00
1.25
1.91

QZ
199.0
208.0
202.0
4.58
0.532
203.00
0.38
1.04

R
208.0
204.0
204.0
2.31
0.236
205.33
0.79
1.44

RF
199.0
203.0
205.0
3.06
0,354
202.33
0.27
0.92

RH
185,0
185.0
178.0
4.04
0.413
182.67
-3.14
-2.48

RK
178.0
193.0
185.0
7.51
0.886
185,33
-2.68
-2.02

RO
211.0
209.0
209.0
1.15
0.118
209.67
1.54
2.19

RR
194.0
203.0
191.0
6.24
0.709
196.00
¦0.93
-0.17

RU
197.0
194.0
195.0
1.53
0.177
195.33
-0.94
-0.29

RX
184.0
190.0
195.0
5.51
0.650
189.6 7
-1.93
-1.27

RZ
97.0
98.0
96.0
0.58
0.059
96.33
*18.09
-17.44
X
S
184.0
205.0
195.0
10.50
1.458
194.67
-1.06
-0.40

SO
206.0
198.0
208.0
5.29
0.591
204.00
0.56
1.21

so
191.0
198.0
200.0
4.73
0.532
196.33
-0.77
-0,12

SF
210.0
210.0
190.0
1155
1.345
203.33
0.44
1,10

SI
209.0
202.0
203.0
3.79
0.413
204.67
0.67
1.33

SM
227.0
216.0
215.0
6.66
0.709
219.33
3.21
3.87
ft
8N








m
SR
193.0
193.0
198.0
2.89
0.295
194.67
-1.06
-0.40

ss
208.0
211.0
219.0
5.63
0.650
212 67
2.06
2.71

ST








$ i
sv
191.0
193.0
188.0
2.52
0.295
190.67
-1.75
-1.10

sx
178.0
187.0
178.0
6.20
0.532
181.00
-3.43
-2.77

sz
205.0
204.0
201.0
2.08
0.236
203.33
0.44
1.10

T
217.0
200,0
218.0
10.12
1.120
211.67
1.88
2.54

TC
264.0
260.0
238.0
15:14
2.245
253.33
9.10
9:76
x
TD
201.0
192.0
195.0
4.58
0.532
196.00
-0.83
-0.17

TH








*
TL








*
• —
No data submitted

TAG SYMBOLS

ft s Above control limit
0 a
Insufficient data
X 3
Determined to be an outlier
s Below control limit
-------
CRD-LV Performance Evaluation: Gamma in Water, 7-Jan-1996
28/37
Cesium-137
Lab
Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
fR + SR)
Average
Normalized deviation
(grand-avg) (known) Tag










TQ
TR
190.0
201.0
205.0
7.77
0.886
198.67
-0.37
0.29

TS








•
U
US
210.0
209.0
210.0
0.58
0.059
209.67
1.54
2.19

UN









UP
185.0
193.0
178.0
7.51
0.886
185.33
-2.68
-2.02

UR
TI®
206.0
201.0
196.0
5.00
0.591
201.00
0.04
0.69

UV
198.0
196.0
188.0
5.29
0.591
194.00
-1.18
-0.52
0
UX
193.0
195.0
202.0
4.73
0.532
196.67
-0.71
-0.06

VA
205.0
213.0
209.0
4.00
0.473
209.00
1.42
2.08

VC
208.0
208.0
209.0
0.58
0.059
208.33
1.31
1,96

m
1620.0
1700.0
1680.0
4163

1666.67
Z53.90
254.55
X
VH
190.0
186.0
192.0
3.06
0.354
189.33
-1.98
-1.33

VI
212.0
209.0
214.0
2.52
0.295
211.67
1.88
2.54

VM
174.0
195.0
191.0
11.15
1.458
186.67
-2.45
-1.79

VO
190.0
212.0
211.0
12.42
1.570
204.33
0.61
1.27

vs
200.0
200.0
202.0
1.15
0.118
200.67
-0.02
0.64

w
210.0
203.0
197.0
6.51
0.768
203.33
0.44
1.10

WD
209.0
201.0
205.0
4.00
0.473
205.00
0.73
1.39

WF








i
WI
iya.u
204.0
192.0
6.00
0.709
198.00
-0.48
0.17

WJ
188.0
191.0
187.0
2.08
0.236
188.67
-2.10
-1.44

WK
189.0
184.0
193.0
4.51
0.532
188.67
-2.10
-1.44

WO
197.0
183.0
185.0
7.57
0.827
188.33
-2.16
-1.50

WR
196.0
189.0
188.0
4.36
0.473
191.00
-1.70
-1.04

WS








¦M
WV









WW









X
213.0
211.0
210.0
1.53
0.177
211.33
1.83
-2.48

Data sorted by Laboratory Average
Average
Tag
Lab
Average Tag
Lab
Average
Tae
Lab
53.00
X
M
183.00
MX
189.33

VH
53.33
X
AH
185.00
PX
189.67

RX
96.33
X
RZ
185.33
UP
190.67

sv
116.00
X
P
185.33
RK
191.00

WR
166.00
X
QM
186.67
VM
191.00

I
169.00
11
GQ
187.67
MP
191.33

AW
176.33
11
FZ
188.00
QP
191.67

NJ
180.00

EX
188.33
WO
192.33

EA
181.00

sx
188.67
WK
192.67

KX
182.67

RH
188.67
WJ
193.67

BL
• s No data submitted

TAG SYMBOLS

ft
s Above control limit
0 s Insufficient data

x s Determined to be an
outlier
li
s Below control limit
-------
29/37
CRD-LV Performance Evaluation: Gamma in Water, 7-Jun-1996
Cesium-137
Data sorted by Laboratory Average
Average
Tag
Lab
Average
Tap
Lab
Average
Tag
Lab
193.67

AI
200.00

PM
208.00

QX
194.00

UV
200.00

BO
208.00

HK
194.67

SB
200.33

JY
208.33

VC
194.67

S
200.33

JS
208.33

BH
194.67

EW
200.67

VS
209.00

VA
195.00

J
200.67

m
209.00

Q
195.00

C
201.00

UR
209.33

BA
195.00

BC
201.00

AZ
209.67

U
195.33

HU
201.33

CA
209.67

RO
195.33

NK
201.33

AP
209.67

AL
195.33

GI
202.00

CJ
211.33

X
195.67

OT
202.33

RF
211.33

JM
19567

CM
203.00

QZ
211.33

DO
196.00

TD
203.00

PV
211.33

BN
196.00

RR
203.00

AF
211.67

VI
196.00

OA
203.33

W
211.67

T
196.00

A
203.33

SZ
211.67

CS
196.33

SD
203.33

SF
212.67

ss
196.33

HX
203.33

EB
213.00

FL
196.33

DE
203.67

LT
214.33

KB
196.67

UX
203.67

DH
216.00
ir
L
196.67

PB
204.00

SC
217.00
ft
HP
196.67

DT
204.00

LR
217.00
ir
CE
197.00

BM
204.33

VO
217.33
it
NH
197.33

E
204.33

BB
219.00
n
NO
197.33

CX
204.67

SI
219.00
tr
K
197.33

AU
204.67

QT
219.33
ir
SM
197.33

AE
204.67

N
224.00
ft
O
197.67

FJ
204 67

KL
224.33
ft
QW
198.00

WI
205.00

WD
224.33
ft
<*U
198.00

GL
205.00

LE
224.67
ft
AY
198.00

EL
205.00

DR
253.33
X
TC
198.67

TQ
205.33

R
257.67
X
BK
199.00

JG
205.67

CO
398.33
X
CC
199.33

JE
206.67

LF
1632,33
X
OB
199.67

AJ
207.00

HL
1666.67
X
VE
200.00

PW
207.67

MV
1760.67
X
D



207.67

DD
1777.00
X
PQ
0
3 No data submitted
s Insufficient data
TAG SYMBOLS
x = Determined to be an outlier
ft = Above control limit
il s Below control limit jj
-------
CRD-LV Performance Evaluation: Gamma in Water, 7-Jun-1996	30/37
Cesium-137
responding laba	Frequency distribution
10-t					 -
0- ^ t	— t —	—	-j"*- "	~i"
-6	-4	-2	0	+2	+4
10-
Normalized deviation of the mean from the known value
responding labs	Frequency distribution
*6
11 ¦Y ¦-TIi»iT-Ii»t"-T
-4	-2	0	+1
-6	-4	-2	0	+2	+4	+6
Normalized deviation of the mean from the grand average
-------
CRD-LV Performance Evaluation: Gamma in Water, 7-Jun-1996
=?
31/37
Barium-133	Statistical Summary	167 Participants
The known value of this nuclide is 745.0 pCifl with an expected precision of 75.0; the control limits
are 614.9 td 875.1; the warning regions are 614.9 to 658.2 and 831.8 to 875.1
26(15.6 %) Failed to respond •«,
10(6.0 %) Outliers '
1 (0.6 %) Out of control'
but not an outlier
Statistic
; 123(73.7 %) Within all limits
Respondents
" 7(4.2 %) In warning zone
but within control
Non-outliers
Mean
Std. Dev.
Variance
% Coef. of Var.
% deviation of mean from known value
Norm. dev. of mean from known value
Median
% deviation of median from known value
Norm. dev. of median from known value
836.14
Grand Avg 720.13
801.01
39.53
641612.83
1562.73
95.80
5.49
12.23
-3.34
0.11
-0.63
720.67
717.00
-3.27
-3.76
-0.03
-0.71
-------
(<'—	
32/37
CRD-LV Performance Evaluation: Gamma in Water,
I
§
	^
Barium-133







Lab
Res. 1
Res. 2

Exper.
Rug anal

Normalized deviation
Res. 3
Sigma
(R + SR)
Average
(grand-avg)
(known) Tag
A
727.0
713.0
683.0
22.48
0.347
707.67
-0.29
-0.86
AE
749.0
734.0
718.0
15.50
0.244
733.67
0.31
-0.26
AF
730.0
720.0
728.0
5.29
0.079
726.00
0.14
-0.44
AH







• •
AI
683.0
678.0
684.0
3.21
0.047
681.67
-0.89
-1.46
AJ
741.0
726.0
729.0
7.94
0.118
732.00
0.27
-0.30
AK







!*l
AL
767.0
758.0
768.0
5.51
0.079
764.33
1.02
0.45
AP
692.0
707.0
711.0
10.02
0.150
703.33
-0.39
-0.96
AU
700.0
697.0
682.0
9.64
0.142
693.00
-0.63
-1.20
AW
702.0
705.0
709.0
3.51
0.055
705.33
-0.34
-0.92
AY
829.0
828.0
831.0
1.53
0.024
829.33
2.52
1.95
AZ
699.0
736.0
741.0
22.94
0.331
725.33
0.12
-0.45
BA
744.0
761.0
755.0
8.62
0.134
753.33
0.77
0.19
BB
678.0
715.0
700.0
18.61
0.291
697.67
-0.52
-1.09
BC
636.0
634.0
635.0
1.00
0.016
635.00
-1.97
-2.54
BO







i* 1
BH
702.0
716.0
713.0
7.37
0.110
710.33
-0.23
-0.80
BK
784.0
787.0
786.0
1.53
0.024
785.67
1.51
0.94
BL
735.0
721.0
732.0
7.37
0.110
729.33
0.21
-0.36
BM
749.0
754.0
756.0
3.61
0.055
753.00
0.76
0.18
BN
713.0
712.0
704.0
4.93
0.071
709.67
-0.24
-0.82
BO
710.0
730.0
700.0
15.28
0.236
713.33
-0.16
-0.73
BW








C
765.0
736.0
750.0
14.50
0.228
750.33
0.70
0.12
CA
752.0
760.0
723.0
19.47
0.291
745.00
0.57
0.00
cci
1353.0
1350.0
L363.0
L.73
0.024
135100
iMm
IM - X ¦
CE
785.0
775.0
782.0
5.13
0.079
780.67
1.40
0.82
CJ
790.0
651.0
692.0
71.42
1.180
711.00
-0.21
-0.79
CM
795.0
724.0
777.0
36.91
0.559
765.33
1.04
0.47
CO
723.0
664.0
730.0
36.25
0.520
705.67
-0.33
-0.91
CS
721.0
709.0
715.0
6.00
0.095
715.00
-0.12
-0.69
CX
662.0
669.0
692.0
15.70
0.236
674.33
-1.06
-1.63
D
6220.0
6248.0
6S?8;0;
95.73
1.766
6288.67
MM
128.03 x |
DD
737.0
747.0
744.0
5.13
0.079
742.67
0.52
-0.05
DE
731.0
732.0
732.0
0.58
0.008
731.67
0.27
-0.31
DH
679.0
677.0
682.0
2.52
0.039
679.33
-0.94
-1.52
DO
719.0
699.0
712.0
10.15
0.158
710.00
-0.23
-0.81
DR
718.0
705.0
710.0
6.56
0.102
711.00
-0.21
-0.79
DT
745.0
743.0
748.0
2.52
0.039
745.33
0.58
0.01
DZ








E
703.0
699.0
701.0
2.00
0.032
701.00
-0.44
-1.02
EA
688.0
688.0
688.0
0.00
0.000
688.00
-0.74
-1.32
EB
722.0
717.0
723.0
3.21
0.047
720.67
0.01
-0.56
EL
726.0
740.0
738.0
7.57
0.110
734.67
0.34
-0.24
• =
No data submitted

TAG SYMBOLS

Tf s Above control limit
[0 =
Insufficient data
x =
Determined to be an outlier
= Below control limit
			
-------
f(	
CRD-LV Performance Evaluation
: Gamma in Water,
7-Jun-1996
	.
33/37
Barium-133







Lab
Res. 1
Res. 2
Res. 3
Exper.
Rng anal

Normalized deviation
Sigma
m + SR)
Average
(grnnd-avg) (known) Taar
EW
704.0
706.0
706.0
1.15
0.016
705.33
-0.34
-0.92
EX
743.0
751.0
742.0
4.93
0.071
745.33
0.58
0.01
FJ
738.0
757.0
771.0
16.56
0.260
755.33
0.81
0.24
FL
778.0
763.0
808.0
22.91
0.354
783.00
1.45
0.88
FZ
718.0
709.0
669.0
26.08
0.386
698.67
-0.50
-1.07
GI
704.0
699.0
669.0
18.93
0.276
690.67
-0.68
-1.25
GL
697.0
734.0
716.0
18.50
0.291
715.67
-0.10
-0.68
GQ
753.0
753.0
753.0
0.00
0.000
753.00
0.76
0.18
m
684.0
665.0
682.0
10.44
0.150
677.00
-1.00
-1.57
HK
698.0
694.0
699.0
2.65
0.039
697.00
-0.53
-1.11
HL
737.0
737.0
737.0
0.00
0.000
737.00
0.39
-0.18
HP
665.0
704.0
702.0
21.96
0.307
690.33
-0.69
-1.26
HX
722.0
707.0
682.0
20.21
0.315
703.67
-0.38
-0.95
I
720.0
713.0
694.0
13.45
0.205
709.00
-0.26
-0.83
J
780.0
773.0
776.0
3.51
0.055
776.33
1.30
0.72
JE
720.0
734.0
745.0
12.53
0.197
733.00
0.30
-0.28
JG
643.0
644.0
639.0
2.65
0.039
642.00
-1.80
-2.38
JM
769.0
768.0
775.0
3.79
0.055
770.67
1.17
0.59
JS
709.0
704.0
670.0
21.22
0.307
694.33
-0.60
-1.17
JY
689.0
727.0
735.0
24.58
0.362
717.00
-0.07
-0.65
K
724.0
730.0
727.0
3.00
0.047
727.00
0.16
-0.42
KH
744.0
761.0
749.0
8.74
0.134
751.33
0.72
0.15
KL
730.0
744.0
746.0
8.72
0.126
740.00
0.46
-0.12
KX
759.0
720.0
715.0
24.09
0.347
731.33
0.26
-0.32
L
774.0
767.0
780.0
6.51
0.102
773.67
1.24
0.66
LE
753.0
648.0
715.0
53.16
0.827
705.33
-0.34
-0.92
LF
770.0
770.0
770.0
0.00
0.000
770.00
1.15
0.58
LR
727.0
728.0
716.0
6.66
0.095
723.67
0.08
-0.49
LT
763.0
688.0
773.0
46.46
0.669
741.33
0.49
-0.08
ML-
mo
ft®?
175.0
7,77
0:118
168.67
12174"
;*13:3l X
MP
685.0
700.0
690.0
7.64
0.118
691.67
-0.66
-1.23
MV
760.0
757.0
763.0
3.00
0.047
760.00
0.92
0.35
MX
678.0
685.0
674.0
5.57
0.087
679.00
-0.95
-1.52
N
763.0
766.0
766.0
1.73
0.024
765.00
1.04
0.46
NH
762.0
762.0
764.0
1.15
0.016
762.67
0.98
0.41
NJ
608.0
676.0
610.0
38.70
0.536
631.33
-2.05
-2.63
NK
689.0
703.0
701.0
7.57
0.110
697.67
-0.52
-1.09
NO
725.0
728.0
733.0
4.04
0.063
728.67
0.20
-0.38
NP








O
780.0
780.0
780.0
0.00
0.000
780.00
1.38
0.81
OA
720.0
720.0
710.0
5.77
0.079
716.67
-0.08
-0.65
OB








OK







M :
ok







*51
OT
658.0
674.0
669.0
8.19
0.126
667.00
-1.23
-1.80
• =
No data submitted

TAG SYMBOLS

ft 3 Above control limit
l0-
Insufficient data
X 3
Determined to be an outlier
s Below control limit
-------
f-- - 						—		
34 / 37 CRD-LV Performance Evaluation: Gamma in Water,
7-Jun-1996

	^
r
Barium-133







'
Lab
Rea. 1


Exper.
Rng anal

Normalized deviation

Res. 2
Res. 3
Sigma
(R + SR)
Average
(grand-avg)
(known) Tag
P
376.0
373.0
376.0
L73
0.024
375.00
-7.97
-8.54-

PB
731.0
724.0
737.0
6.51
0.102
730.67
0.24
-0.33

PE








•
PM
684.0
682.0
687.0
2.52
0.039
684.33
-0.83
-1.40

PQ
5985;0
5899.0
6004.0
55.94
0.827
5962.67
121.07
120.50:
x
PU








. +'
PV
732.0
727.0
711.0
10.97
0.165
723.33
0.07
-0.50

PW
675.0
677.0
680.0
2.52
0.039
677.33
-0.99
-1.56

PX
758.0
749.0
740.0
9.00
0.142
749.00
0.67
0.09

Q
800.0
740.0
784.0
31.07
0.473
774.67
1.26
0.69

QJ








•
QM
611.0
611.0
614.0
1.73
0.024
612.00
-2.50
-3.07
11
QP
691.0
702.0
738.0
24.58
0.370
710.33
-0.23
-0.80

QT
903.0
886.0
905.0
10.44
0.150
898.0Q
4.11
&S3
X
QU
884.0
882.0
886.0
2.00
0.032
884,00
3>78
3J21
X
QW
983.0
824.0
846.0
86.38
1:480
884.00
3.78
321
X .
QX
798.0
800.0
806.0
4.16
0.063
801.33
1.88
1.30

QZ
737.0
693.0
714.0
22.01
0.347
714.67
-0.13
-0.70

R
696.0
695.0
697.0
1.00
0.016
696.00
-0.56
-1.13

RF
673.0
681.0
669.0
6.11
0.095
674.33
-1.06
-1.63

RH
674.0
682.0
676.0
4.16
0.063
677.33
-0.99
-1.56

RK
734.0
744.0
739.0
5.00
0.079
739-00
0.44
-0.14

RO
689.0
685.0
676.0
6.66
0.102
683.33
-0.85
-1.42

RR
724.0
744.0
707.0
18.52
0.291
725.00
0.11
-0.46

RU
739.0
735.0
740.0
2.65
0.039
738.00
0.41
-0.16

RX
723.0
710.0
735.0
12.50
0.197
722.67
0.06
-0.52

HZ
370,0
368.0
369.0
1.00
0.016
369.00
-Sill
"8.68
X
S
753.0
742.0
744.0
5.86
0.087
746.33
0.61
0.03

sc
675.0
674.0
698.0
13.58
0.189
682.33
-0.87
-1.45

SD
673.0
682.0
676.0
4.58
0.071
677.00
-1.00
-1.57

SF
700.0
690.0
670.0
15.28
0.236
686.67
-0.77
-1.35

SI
659.0
712.0
699.0
27.62
0.417
690.00
-0.70
-1.27

SM
783.0
758.0
754.0
15.72
0.228
765.00
1.04
0.46

SN








i
SR
674.0
700.0
669.0
16.64
0.244
681.00
-0.90
-1.48

ss
678.0
677.0
692.0
8.39
0.118
682.33
-0.87
-1.45

ST








-•
sv
724.0
739.0
716.0
11.68
0.181
726.33
0.14
-0.43

sx
719.0
758.0
714.0
24.09
0.347
730.33
0.24
-0.34

sz
698.0
703.0
720.0
11.53
0.173
707.00
-0.30
-0.88

T
755.0
747.0
762.0
7.51
0.118
754.67
0.80
0.22

TC
856.0
782.0
787.0
41.36
0.583
808.33
2.04
1.46

TD
652.0
652.0
646.0
3.46
0.047
650.00
-1.62
-2.19

TH









TL








•
• S
No data submitted

TAG SYMBOLS

ft s Above control limit
0 S
		
Insufficient data
x =
Determined to be an outlier
JJ. = Below control limit J
		
-------
CRD-LV Performance Evaluation: Gamma in Water, 7-Jun-1996
36/37
Barium-133
Lab
Res. 1
Res. 2
Res. 3
Exper.
Rng anal

Normalized deviation

Sigma
(R + SR)
Average
(grand-avg)
(known) Tae
TO






.... - . .


TQ
725.0
706.0
710.0
10.02
0.150
713.67
-0.15
-0.72
TR







ra








£
•
U
755.0
751.0
720.0
19.16
0.276
74Z.UU
0.51
-0.07

UE







UN*









UP
603.0
662.0
630.0
29.54
0.465
631.67
-2.04
-2.62

UR
777.0
774.0
786.0
6.24
0.095
779.00
1.36
0.79.

in?







uv
693.0
703.0
701.0
5.29
0.079
699.00
-0.49
-1.06
ux
650.0
663.0
721.0
37.80
0.559
678.00
-0.97
-1.55

VA
804.0
801.0
800.0
2.08
0.032
801.67
1.88
1.31

VC
738.0
742.0
744.0
3.06
0.047
741.33
0.49
-0.08

VR
6280.0
6410,0
6460.0
104.09
2.095
mmii
mm
13GM
X
VH
642.0
638.0
643.0
2.65
0.039
641.00
-1.83
-2.40

VI
687.0
697.0
675.0
11.02
0.173
686.33
-0.78
-1.35

VM
718.0
710.0
708.0
5.29
0.079
712.00
-0.19
-0.76

VO
684.0
744.0
761.0
40.45
0.606
729.67
0.22
-0.36

vs
691.0
700.0
690.0
5.51
0.079
693.67
-0.61
-1.19

w
735.0
720.0
719.0
8.96
0.126
724.67
0.10
-0.47

WD
749.0
745.0
754.0
4.51
0.071
749.33
0.67
0.10

Wff







:«
WI
712.0
692.0
725.0
16.62
0.260
709.67
-0.24
-0.82

WJ
747.0
756.0
765.0
9.00
0.142
756.00
0.83
0.25

WK
717.0
713.0
724.0
5.57
0.087
718.00
-0.05
-0.62

WO
815.0
803.0
814.0
6.66
0.095
810.67
2.09
1.52

WR
643.0
660.0
660.0
9.81
0.134
654.33
-1.52
-2.09

W®







5*
WV








It
WW








*
X
720.0
687.0
713.0
17.39
0.260
706.67
-0.31
-0.89

Data sorted by Laboratory Average
Average
Tag
Lab
Average
Tag
Lab
Average
Tag
Lab
168.67
X
M
654.33

WR
679.33

DH
369.00
X
RZ
667.00

OT
681.00

SR
375.00
X
P
674.33

RF
681.67

AI
612.00
11
QM
674.33

CX
682.33

ss
631.33

NJ
677.00

SD
682.33

sc
631.67

UP
677.00

HI
683.33

RO
635.00

BC
677.33

RH
684.33

PM
641.00

VH
677.33

PW
686.33

VI
642.00

JG
678.00

UX
686.67

SF
650.00

TD
679.00

MX
688.00

EA
• = No data submitted
0 a Insufficient data
TAG SYMBOLS
x = Determined to be an outlier
It = Above control limit
= Below control limit
-------
f	¦	, ¦ r :	=	... 1
3® f 37	CRD-LV Performance Evaluation: Gamma in Water, 7-Jun-1998
r		—
Barium-133
Data sorted by Lahorn
-------
CRD-LV Performance Evaluation: Gamma in Water, 7-Jun*1996	37 / 37
Barium-133
% responding labs	Frequency distribution
10-

flT	1	r	T	-T-"'T " T	1 ¦ ¦—i	1	r
¦6	-4	~2	0	+2	+4	+6
Normalized deviation of the mean from the known value
% responding labs	Frequency distribution
10-
	1	r
fllllillln.
i		 T"		-—I	"r-	1	r®

-4	-2	0	+2
Normalized deviation of the mean from the grand average
-------
United States	Office of Research and	EPA/600/R-96/101
Environmental Protection Development	August 1996
Agency	Washington, DC 20460
&EPA Uranium-Radium in
Water Performance
Evaluation Study
A Statistical Evaluation of
the June 21,1996 Data
-------
Uranium-Radium in Water
Performance Evaluation Study
June 21, 1996
Environmental Protection Agency
National Exposure Research Laboratory
Characterization Research Division
Las Vegas, Nevada
-------

UNITED STATES ENVIRONMENTAL PROTECTION AGENCY
OFFICE OF RESEARCH AND DEVELOPMENT
NATIONAL EXPOSURE RESEARCH LABORATORY
CHARACTERIZATION RESEARCH DIVISION-LAS VEGAS
P.O. BOX 93478
LAS VEGAS, NEVADA 89193-3478
(702/798-2100)
Dear Participant,
Enclosed are the results of the Analytical Sciences Branch (CRD-LV)
Performance Evaluation Study for Uranium-Radium in Water; June 21, 1996.
The known value for each analysis was determined by gravimetric methods,
checked by chemical analyses performed by CRD-LV's Radiochemistry Laboratory,
and compared to the participating laboratories' grand average.
The expected precision, determined by the known value, was taken from
"Table 3. Laboratory Precision: One Standard Deviation Values and Control Limits
for Various Analyses", which is based on data accumulated over the years by the
Performance Evaluation Program, and can be found in the Environmental Radioactivity
Performance Evaluation Studies Program and Radioactive Standards Distribution
Program information brochure.
Please take a few minutes to review this report and the analytical data your
laboratory submitted to us. If there are any apparent discrepancies, please notify us
immediately.
We encourage you to make use of the computer-automated data-entry system
that has been in place for some time now. As the number of participants increases,
and it becomes unrealistic for us to receive results by mail or FAX, the computer
system will be our only avenue for accepting data.
If you have any questions or comments, please send a message via the data-entry
system or contact Stephen Pia at 702/798-2102 or Patricia Honsa at 702/798-2141.
Sincerely
Stephen Pia
Team Leader
RADQA Program
Enclosure
-------
NOTICE
This material has been funded wholly by
the U.S. Environmental Protection Agency.
It has been subjected to the Agency's review,
and has been approved for publication as
an EPA document.
-------
t
CRD-LV Performance Evaluation: Uranium-Radium in Water, 21-Jun-1996 1/20
The following pages consist of separate sections for each of the nuclides in this study with four
parts per section. After the first, each part is separated from the next by a new page or n thick
horizontal bar. The first page of each section is a statistical summary for the nuclide and starts
with a statement of the known value, the control limits, and the warning limits.
The warning limits are placed at two normalized standard deviations above and below the
known value and the control limits are three normalized standard deviations above and below
the known value. If you keep control charts, these values will be useful for anticipating problems
with the accuracy of your analytical methods.
The coin shaped pie chart at the top of the summary page shows the fate of all the samples
sent out in number and percentage terms. The pie chart starts at the top and rotates clockwise.
The first sector represents those participants who submitted analytical results within both the
warning and control limits. The next sector represents those who are in the warning region but
not out of control. The third sector represents those who are out of control, but have passed
the outlier test. The fourth sector'represents those who have failed the outlier test. The last
sector represents those participants who have failed to respond properly. This is the case if no
analytical results were returned, or less than three determinations were reported, or if the results
were received too late. The reeding on the edge of the coin is spaced at one percent intervals, and
the sector shading becomes darker as the data reliability decreases. Sectors with zero width are
not shown.
The table in the center shows a number of statistical quantities calculated from the submitted
data based on the mean and median values in relation to the known value, both before and after
outlier removal. The lower pie chart uses the same construction as the upper chart and shows
the distribution of properly submitted data in terms of deviation from the known value divided
into sectors representing one, two, three, and greater than three normalized standard deviations.
The second part is an alphabetical listing, in lab-code order, of submitted data and several
calculated quantities. An entry that is shaded has been rejected because of one of the reasons
listed above or failure of the outlier test. The fifth and sixth columns are a measure of laboratory
precision. The Range analysis is a normalized value that you may use to keep precision control
charts. The eighth and ninth columns are the differences from the mean of all non-outliers and
from the known value, respectively. If this value is between 2.0 and 3.0, your analytical process
precision is in the warning zone; if it exceeds 3.0 it is out of control. A tag symbol may appear in
the last column. Each page with tags has a symbol definition summary at the bottom. If there is
no tag symbol, the data is within the control limits, but it may be in the warning zone.
The third part is a three-column listing of result average, tag symbol, and lab-code in average
order excluding those labs not responding properly. In this order, all outliers and out-of-control
results appear at the top or bottom of the list.
The last part is two bar chart displays showing frequency distributions of responding
participants. The first chart places the known value at the center and a bar at each 0.2 unit of
expected precision. The second chart places the mean of the reported measurements at the center
and a bar at each 0.2 unit of standard deviation. In both cases, a bar includes those results within
0.1 unit up to the maximum of six. Any results more than six units from the center value are
shown cumulatively by a shaded bar one past the sixth unit. If the central tendency of the known
value distribution falls away from the center, an error in accuracy is indicated. If the distribution
is broad, poor precision is indicated. The mean value distribution is similar but uses the average
and standard deviation of reported results as its basis.
-------
—							 	
2/20 CRD-LV Performance Evaluation: Uranium-Radium in Water, 21-Jun-1996
The Range Analysis(R + SR) is calculated from the range, mean range and standard error of
the range values. The range is the difference between the maximum and minimum results for the
laboratory. The mean range is calculated by multiplying the expected precision by 1.693(for three
results). The standard error of the range is calculated by multiplying the mean range by 2.575(for
three results), subtracting the mean range from this product, and dividing the result by 3. If the
range is greater than the mean range, then the range analysis is calculated by subtracting the
mean range from the range, dividing the result by the standard error of the range and adding 1.
If the mean range is greater than or equal to the range, then the range analysis is calculated by
dividing the range by the mean range.
The normalized deviation of the mean from the grand average is calculated from the deviation
of the mean from the grand average and the standard error of the mean values. The deviation of
the mean from the grand average is calculated by subtracting the grand average from the
average of the laboratory's three results. The standard error of the mean is calculated by
dividing the expected precision by the square root of 3(the number of results). The normalized
deviation of the mean from the grand average is calculated by dividing the deviation of the mean
from the grand average by the standard error of the mean.
The normalized deviation of the mean from the known value is calculated from the deviation of
the mean from the known value and the standard error of the mean values. The deviation of the
mean from the known value is calculated by subtracting the known value from the average of the
laboratory's three results. The standard error of the mean is calculated by dividing the expected
precision by the square root of 3(the number of results). The normalized deviation of the mean
from the known value is calculated by dividing the deviation of the mean from the known value by
the standard error of the mean.
A complete explanation of the statistical calculations involved in the report may be found in
the Environmental Radioactivity Performance Evaluation Studies Program information brochure
[Draft Revision of EPA-600/4-81-004], available from Patricia Honsa, CRD-LV, 702/798-2141.
-------
CRD-LV Performance Evaluation: Uranium-Radium in Water, 21-Jun-1996 3 / 20
Uranium (Natural)
Statistical Summary
149 Participants
The known value of this nuclide is 20.2 pCi/1 with an expected precision of 3.0; the control limits
are 15.0 to 25.4; the warning regions are 15.0 to 16.7 and 23.7 to 25.4
26(17.4 %) Failed to respond
. 103(69.1 %) Within all limits
8(5.4 %) Outliers ' • \K
—.
* * tr\

2(1.3 %) Out of control '

10(6.7 %) In warning zone
but not an outlier
^-U-l |
I I I
but within control
Statistic
Respondents
Non-outliers
Mean
21.20
Grand Avg 19.90 .
Std. Dev.
11.93
1.89
Variance
142.27
3.57
% Coef. of Var.
56.27
9.50
% deviation of mean from known value
4.93
-1.49
Norm. dev. of mean from known value
0.08
-0.16
Median
19.93
19.93
% deviation of median from known value
-1.32
-1.32
Norm. dev. of median from known value
-0.02
-0.14
10(8.1 %) More than 3 norm. S.D.
11 (8.9 %) Between 2 and 3 norm. S.D.
; 75(61.0 %) Within 1 norm. S.D.
¦
of known value
27(22.0 %) Between 1 and 2 norm. S.D.
-------
(r	








	
4 / 20 CRD-LV Performance Evaluation: Uranium-Radium in Water, 21-Jun-1996

'
Uranium (Natural)







Lab
Res. 1


Exper.
Rng anal

Normalized deviation

Res. 2
Res. 3
Sigma
(R + SR)
Average
(grand-avg)
(known) Tag
A
17.8
18.2
18.0
0.20
0.079
18.00
-1.10
-1.27

AE
21.3
20.6
21.0
0.35
0.138
20.97
0.62
0.44

AF
21.0
20.6
20.2
0.40
0.158
20.60
0.40
0.23

AH
18.5
18.8
18.4
0.21
0.079
18.57
-0.77
-0.94

AJ
22.7
23.8
20.7
1.57
0.610
22.40
1.44
1.27

AK
20.1
20.9
21.5
0.70
0.276
20.83
0.54
0.37

AL
19.7
21.1
22.9
1.60
0.630
21.23
0.77
0.60

AP
21.6
18.8
19.0
1.56
0.551
19.80
-0.06
-0.23

AR
14.7
14.7
14.8
0.06
0.020
14.73
-2.98
-3.16

AU








• •'
AW
17.4
18.6
18.4
0.64
0.236
18.13
-1.02
-1.19

AZ
21.0
20.3
19.6
0.70
0.276
20.30
0.23
0.06

BA
19.0
21.0
22.4
1.71
0.669
20.80
0.52
0.35

BC
19.7
19.6
19.4
0.15
0.059
19.57
-0.19
-0.37

BG
16.9
17.8
17.8
0.52
0.177
17.50
-1.39
-1.56

BG
20.0
20.3
19.7
0.30
0.118
20.00
0.06
-0.12

BG
24.0
26.0
23.1
1.48
0.571
24.37
2.58
2.41

BH
11.6
11.8
12.0
0.20
0^079
11,80
-4.68
-4.85,
,x
BK
19.4
19.6
19.1
0.25
0.098
19.37
-0.31
-0.48

BM
20.9
20.6
20.2
0.35
0.138
20.57
0.39
0.21

BN
20.8
21.8
19.2
1.31
0.512
20.60
0.40
0.23

BO
19.2
19.5
20.1
0.46
0.177
19.60
-0.17
-0.35

C
19.5
20.6
20.0
0.55
0.217
20.03
0.08
-0.10

CA
20.4
19.6
21.2
0.80
0.315
20.40
0.29
0.12

CC
61;0
61.4
60.7
0.35
0.i38
61.03
23.75
23.58.
X
CE
19.0
19.5
19.1
0.26
0.098
19.20
-0.40
-0.58

CG
20.6
20.9
19.7
0.62
0.236
20.40
0.29
0.12

CJ
22.0
22.0
20.0
1.15
0.394
21.33
0.83
0.65

CM
19.9
19.8
20.5
0.38
0.138
20.07
0.10
-0.08

CS
17.6
18.3
17.9
0.35
0.138
17.93
-1.14
-1.31

CX
23.0
23.3
22.7
0.30
0.118
23.00
1.79
1.62

D
20.9
21.4
20.2
0.60
0.236
20.83
0.54
0.37

DB
19.0
17.2
17.3
1.01
0.354
17.83
-1.19
-1.37

DE
18.7
18.8
18.9
0.10
0.039
18.80
-0.63
-0.81

DI
20.1
19.9
20.8
0.47
0.177
20.27
0.21
0.04

DO
19.0
18.9
19.3
0.21
0.079
19.07
-0.48
-0.65

DT
18.0
18.0
18.9
0.52
0.177
18.30
-0.92
-1.10

DZ
20.6
19.1
21.8
1.35
0.532
20.50
0.35
0.17

E
20.6
20.1
19.1
0.76
0.295
19.93
0.02
-0.15

EB
19.8
19.2
19.5
0.30
0.118
19.50
-0.23
-0.40

EL
19.0
19.7
18.3
0.70
0.276
19.00
-0.52
-0.69

EO









EP









ER
17.4
19.8
18.1
1.23
0.473
18.43
-0.85
-1.02

FJ
4,6
4.7
4.4
0.15
0.059
4.57
-8.85
•9.03
X
• =
No data submitted

TAG SYMBOLS

It = Above control limit
1 0 =
	
Insufficient data
x =
Determined to be an outlier
JJ = Below control limit
-------
	








	*

CRD-LV Performance Evaluation: Uranium-Radium in Water, 21-Jun-1996 5/20
Uranium (Natural)






—s
Lab
Res. 1


Exper.
Rng anal

Normalized deviation

Res. 2
Res. 3
Sigma
(R + SR)
Average
(grand-avg)
(known) Tag
FN
19.3
19.0
18.2
0.57
0.217
18.83
-0.62
-0.79

FZ
25.8
21.9
25.1
2.08
0.768
24.27
2.52
2.35

GN
16.1
15.6
16.2
0.32
0.118
15.97
-2.27
-2.44

GQ
18.5
18.9
18.7
0.20
0.079
18.70
-0.69
-0.87

HK
20.0
21.8
19.4
1.25
0.473
20.40
0.29
0.12

HL
19.8
20.6
19.7
0.49
0.177
20.03
0.08
-0.10

HP
19.6
19.8
20.0
0.20
0.079
19.80
-0.06
-0.23

I
24.7
19.0
18.5
3.44
1.420
20.73
0.48
0.31

ID
19.9
17.8
17.1
1.46
0.551
18.27
-0.94
-1.12

J
20.4
20.8
20.0
0.40
0.158
20.40
0.29
0.12

JE
19.1
19.5
17.6
1.00
0.374
18.73
-0.67
-0.85
1
JG









JK
17.0
19.7
19.2
1.44
0.532
18.63
-0.73
-0.90

JN
26.7
41.3
3a3
7.61
4.571
32.77
7;43
7.26
*
JP
21.9
22.1
22.1
0.12
0.039
22.03
1.23
1.06

JS
19.0
19.4
19.8
0.40
0.158
19.40
-0.29
-0.46

JX








«
JY
20.3
18.4
18.4
1.10
0.374
19.03
-0.50
-0.67

K
22.1
25.1
22.5
1.63
0.591
23.23
1.92
1.75

KH
19.6
19.5
19.4
0.10
0.039
19.50
-0.23
-0.40

KL









KT
23.0
24.0
24.0
0.58
0.197
23.67
2.18
2.00

L
20.8
20.2
19.3
0.75
0.295
20.10
0.12
-0.06

LF








«
LU








•
LT
19.4
19.3
19.9
0.32
0.118
19.53
-0.21
-0.38

LZ
20.3
19.6
20.9
0.65
0.256
20.27
0.21
0.04

M








• '
MX









N
20.8
20.7
20.9
0.10
0.039
20.80
0.52
0.35

NA
18.0
19.0
20.0
1.00
0.394
19.00
-0.52
-0.69

NH
21.0
22.0
20.0
1.00
0.394
21.00
0.64
0.46

NJ
21.7
22.9
22.1
0.61
0.236
22.23
1.35
1.17

NK
17.8
18.7
18.8
0.55
0.197
18.43
-0.85
-1.02

NO
20.7
21.8
22.1
0.74
0.276
21.53
0.94
0.77

NT
21.2
22.6
23.9
1.35
0.532
22.57
1.54
1.37

6








•r
OB
23.7
23.7
24.2
0.29
0.098
23.87
2.29
2.12

OF








•
OM








•
OS
20.3
17.8
18.6
1.28
0.492
18.90
-0.58
-0.75

OX








J».
OY
26.2
23.6
24.8
1.30
0.512
24.87
2.87
2.69

P
20.4
18.0
20.3
1.36
0.473
19.57
-0.19
-0.37

PB
20.5
20.1
20.0
0.26
0.098
20.20
0.17
0.00

• =
No data submitted

TAG SYMBOLS

IT = Above control limit
Li?.-
Insufficient data
X s
Determined to be an outlier
JJ = Below control limit
-------
f, 		
6/20 CRD-LV Performance Evaluation: Uranium-Radium in Water, 21-Jun-1996
	^
¦ 1 - -
Uranium (Natural)






"
Lab
Res. 1
Res. 2

Exper.
Rng anal

Normalized deviation

Res. 3
Sigma
(R + SR)
Average
(grand-avg)
(known) Tag
PG
14.7
14.2
15.3
0.55
0.217
14.73
-2.98
-3.16
U
PQ
19.9
20.3
19.3
0.50
0.197
19.83
-0.04
-0.21

FV
8.2
10.6
7^8
i.51
0.551
8.87
-6:37
-6.54
X
PW
16.8
12.1
21.0
4.45
2.433
16.63
-1.89
-2.06

PX
22.0
21.9
22.2
0.15
0.059
22.03
1.23
1.06

Q
20.1
21.5
18.7
1.40
0.551
20.10
0.12
-0.06

QJ








•
QM
21.2
22.2
21.3
0.55
0.197
21.57
0.96
0.79

QQ
16.5
17.2
19.8
1.74
0.650
17.83
-1.19
-1.37

QU
24.0
26.5
21.5
2.50
0.984
24.00
2.37
2.19

QX
17.8
18.7
18.3
0.45
0.177
18.27
-0.94
-1.12

QZ
R
20.5
20.6
20.6
0.06
0.020
20.57
0.39
0.21

XV
RD
18.9
19.0
19.5
0.32
0.118
19.13
-0.44
-0.62
•
RF
22.6
19.6
19.4
1.79
0.630
20.53
0.37
0.19

RG
20.4
20.2
19.8
0.31
0.118
20.13
0.14
-0.04

RK
16.7
20.4
18.7
1.85
0.728
18.60
-0.75
-0.92

RP
20.0
20.1
20.1
0.06
0.020
20.07
0.10
-0.08

RR
19.7
20.1
19.7
0.23
0.079
19.83
-0.04
-0.21

RX
19.5
18.1
19.4
0.78
0.276
19.00
-0.52
-0.69

RZ
18.8
17.5
18.1
0.65
0.256
18.13
-1.02
-1.19

S
18.2
17.0
17.4
0.61
0.236
17.53
-1.37
-1.54

sc
19.2
20.0
18.7
0.66
0.256
19.30
-0.35
-0.52

SD
18.3
18.2
17.9
0.21
0.079
18.13
-1.02
-1.19

SF
19.3
20.0
19.4
0.38
0.138
19.57
-0.19
-0.37

SI
23.3
24.2
24.2
0.52
0.177
23.90
2.31
2.14

SL
16.0
16.0
17.0
0.58
0.197
16.33
-2.06
-2.23

SM
21.2
16.4
19.2
2.41
0.945
18.93
-0.56
-0.73

SO
16.1
16.2
17.1
0.55
0.197
16.47
-1.98
-2.16

ss
22.9
21.4
22.1
0.75
0.295
22.13
1.29
1.12

sx
18.4
19.1
20.1
0.85
0.335
19.20
-0.40
-0.58

sz
19.0
18.8
19.4
0.31
0.118
19.07
-0.48
-0.65

T
17.8
18.6
19.8
1.01
0.394
18.73
-0.67
-0.85

TD
20.3
20.3
20.4
0.06
0.020
20.33
0.25
0.08

TH








V
TL









TN








•
TQ
21.8
21.8
21.7
0.06
0.020
21.77
1.08
0.90

TS








-•
U
17.9
17.0
17.8
0.49
0.177
17.57
-1.35
-1.52

UE
20.5
19.9
19.7
0.42
0.158
20.03
0.08
-0.10

UN








•
UP
12.3
13.2
12.9
0-46
0.177
12.80
-4:10

X
UQ









UZ
53.6
48;7
44.0
4.76
2.658
48.73
16:65
16.47
X
• =
No data submitted

TAG SYMBOLS

IT = Above control limit
[0H
Insufficient data
X =
Determined to be an outlier
= Below control limit
-------
CRD-LV Performance Evaluation: Uranium-Radium in Water, 21-Jun-1996 7/20
Uranium (Natural)
Lab
Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known) Tae
VA
142.1
137;7
134.8
3.68
1.833
138:20
68.30
68il3

VH
18.0
17.3
19.2
0.96
0.374
18.17
-1.00
-1.17

VI
18.5
18.5
17.5
0.58
0.197
18.17
-1.00
-1.17

W
20.5
20.0
19.fi
0.36
0.138
20.10
0.12
-0.06

WC









WG
22.8
22.9
23.8
0.55
0.197
23.17
1.89
1.71

WH
19.8
23.3
20.0
1.97
0.689
21.03
0.65
0.48

WI
17.8
18.4
18.8
0.50
0.197
18.33
-0.90
-1.08

WO
20.8
19.5
22.5
1.50
0.591
20.93
0.60
0.42

WQ








«
WH
18.2
19.9
21.7
1.75
0.689
19.93
0.02
-0.15

Ws








•
•
WV








X
23.0
20.5
20.5
1.44
0.492
21.33
0.83
0.65

mmaaaa
Data sorted by Laboratory Average
Average
Taj*
Lab
Average
Tag
Lab
Average
Tae
Lab
4.57
X
FJ
18.57

AH
19.60

BO
8.87
X
PV
18.60

RK
19.80

HP
11.80
X
BH
18.63

JK
19.60

AP
12.80
X
UP
18.70

GQ
19.83

RR
14.73
it
PG
18.73

T
19.83

PQ
14.73

AR
18.73

JE
19.93

WR
15.97

GN
18.80

DE
19.93

E
16.33

SL
18.83

FN
20.00

BG
16.47

SO
18.90

OS
20.03

UE
16.63

PW
18.93

SM
20.03

EEL
17.50

BG
19.00

RX
20.03

C
17.53

S
19.00

NA
20.07

RP
17.57

U
19.00

EL
20.07

CM
17.83

QQ
19.03

JY
20.10

W
17.83

DB
19.07

SZ
20.10

Q
17.93

cs
19.07

DO
20.10

L
18.00

A
19.13

RD
20.13

RG
18.13

SD
19.20

SX
20.20

PB
18.13

RZ
19.20

CE
20.27

LZ
18.13

AW
19.30

SC
20.27

D1
18.17

VI
19.37

BK
20.30

AZ
18.17

VH
19.40

JS
20.33

TD
18.27

QX
19.50

KH
20.40

J
18.27

ID
19.50

EB
20.40

HK
18.30

DT
19.53

LT
20.40

CG
18.33

WI
19.57

SF
20.40

CA
18.43

NK
19.57

P
20.50

DZ
18.43

ER
19.57

BC
20.53

RF
• s No data submitted TAG SYMBOLS ft s Above control limit
. 0 = Insufficient data	x — Determined to be an outlier	¦It = Below control limit
-------
8/20 CRD-LV Performance Evaluation: Uranium-Radium in Water, 21-Jun-1996
Uranium (Natural)
Data sorted by Laboratory Average
Average
Tag
Lab
Average
Tag
Lab
Average
Tag
Lab
20.57

QZ
21.23

AL
23.17

WG
20.57

BM
21.33

X
23.23

K
20.60

BN
21.33

CJ
23.67

KT
20.60

AF
21.53

NO
23.87

OB
20.73

I
21.57

QM
23.90

SI
20.80

N
21.77

TQ
24.00

QU
20.80

BA
22.03

PX
24.27

FZ
20.83

D
22.03

JP
24.37

BG
20.83

AK
22.13

ss
24.87

OY
20.93

WO
22.23

NJ
32.77
X
JN
20.97

AE
22.40

AJ
48.73
X
UZ
21.00

NH
22.57

NT
61.03
X
CC
21.03

WH
23.00

CX
138.20
X
VA
% responding labs
10-
Frequency distribution
-2	0	+2
Normalized deviation of the mean from the known value
% responding labs
Frequency distribution
10-

a^a-

—f—
+4
—r~
+6
-6
-4	-2	0	+2
Normalized deviation of the mean from the grand average
• = No data submitted	TAG SYMBOLS	IT = Above control limit
0 = Insufficient data	x = Determined to be an outlier	W = Below control limit J
=2/
-------
—
CRD-L.V Performance Evaluation: Uranium-Radium in Water, 21-Jun-1996 9 / 20
Radium-226
Statistical Summary
147 Participants
The known value of this nuclide is 4.9 pCi/1 with an expected precision of 0.7; the control limits
are 3.7 to 6.1; the warning regions are 3.7 to 4.1 and 5.7 to 6.1
42(28^6 %) Failed to respond \
11 (7.5 %) Outliers -
4(2.7 %) Out of control
but not an outlier
Statistic
; 76(51.7 %) Within all limits
Respondents
-- 14(9.5 %) In warning zone
but within control
Non-outliers
Mean
Std. Dev.
Variance
% Coef. of Var.
% deviation of mean from known value
Norm. dev. of mean from known value
Median
% deviation of median from known value
Norm. dev. of median from known value
5.53
2.27
5.15
41.05
12.78
0.28
5.00
2.04
0.04
Grand Avg 4.90
0.64
0.41
13.05
-0.06
0.00
4.95
1.02
0.08
15(14.3 %) More than 3 norm. S.D. »
.51(48.6 %) Within 1 norm. S.D.
•	of known value
:
14(13.3 %) Between 2 and 3 norm. S.D. •
<25(23.8 %) Between 1 and 2 norm. S.D.
-------
r —
10 / 20 CRD-LV Performance Evaluation: Uranium-Radium in Water, 21-Jun-1996
	^
r
Radium-226








Lab
Res. 1
Res. 2

Exper.
Rng anal

Normalized deviation

Res. 3
Sigma
(R + SR)
Average
(grand-avg)
(known) Tog
K
AE
5.3
5.2
5.4
0.10
0.169
5.30
1.00
0.99
•
AF
4.9
4.8
4.7
0.10
0.169
4.80
-0.24
-0.25

AH









AJ
3.6
4.2
4.0
0.31
0.506
3.93
-2.38
-2.39

AK
4.9
5.2
5.4
0.25
0.422
5.17
0.67
0.66

AL
4.3
4.3
4.5
0.12
0.169
4.37
-1.31
-1.32

AP
4.6
4.4
4.8
0.20
0.338
4.60
-0.74
-0.74

AR








•
AU
2.9
3.0
2.7
0.15
0.253
2.87
-5.02
-5.03
li
AW
4.8
5.0
5.6
0.42
0.675
5.13
0.58
0.58

AZ
3.1
4.2
4.6
0.78
1.506
3.97
-2.30
-2.31

BA
4.4
3.8
4.8
0.50
0.844
4.33
-1.40
-1.40

BC
4.7
4.9
5.3
0.31
0.506
4.97
0.17
0.16

BG
136
13.4
24.0
6.06
16:132
17;00
29.95
29.94
X
BH
4.1
4.8
4.9
0.44
0.675
4.60
-0.74
-0.74

BK
5.1
5.2
5.1
0.06
0.084
5.13
0.58
0.58

BM
4.8
4.6
4.4
0.20
0.338
4.60
-0.74
-0.74

BN
7.0
6.4
6.8
0.31
0.506
6.73
4.54
4.54
It
BO
5.1
5.0
4.8
0.15
0.253
4.97
0.17
0.16

C
4.7
4.0
4.4
0.35
0.591
4.37
-1.31
-1.32

CA
4.7
4.9
4.8
0.10
0.169
4.80
-0.24
-0.25

CC
9;3
10.2
9.7
0.45
0.759
9.73
11.97
1196
X
CE
4.0
5.1
4.7
0.56
0.928
4.60
-0.74
-0.74

CG
4.2
5.5
4.7
0.66
1.185
4.80
-0.24
-0.25

CJ
5.2
5.6
5.7
0.26
0.422
5.50
1.49
1.48

CM








•
cs
5.7
5.0
5.7
0.40
0.591
5.47
1.41
1.40

cx








•
D








•
DB
5.1
5.0
5.1
0.06
0.084
5.07
0.42
0.41

DE
5.3
5.4
5.5
0.10
0.169
5.40
1.24
1.24

DI








•
DO








•
DT
4.6
4.3
4.8
0.25
0.422
4.57
-0.82
-0.82

DZ
5.0
4.5
5.5
0.50
0.844
5.00
0.25
0.25

E
4.8
5.4
4.9
0.32
0.506
5.03
0.34
0.33

EB
5.2
4.9
4.7
0.25
0.422
4.93
0.09
0.08

EL
5.5
5.6
5.1
0.26
0.422
5.40
1.24
1.24

EO
5.1
5.3
5.2
0.10
0.169
5.20
0.75
0.74

EP
4.7
4.7
4.7
0.00
0.000
4.70
-0.49
-0.49

ER
5.1
5.0
5.1
0.06
0.084
5.07
0.42
0.41

FJ









FN
5.6
6.1
5.8
0.25
0.422
5.83
2.32
2.31

FZ









• =
No data submitted

TAG SYMBOLS

ft s Above control limit
u-
Insufficient data
x =
Determined to be an outlier
Jl = Below control limit
	
-------
CRD-LV Performance Evaluation: Uranium-Radium in Water, 21-Jun-19»6 11/20
Radium-226
Lab Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known) Tag
GN
5.5
5.9
5.4
0.26
0.422
5.60
1.74
1.73
GQ
3.8
3.8
3.8
0.00
0.000
3.80
-2.71
-2.72
HK
5.0
5.1
5.0
0.06
0.084
5.03
0.34
0.33
HL
5.2
5.2
5.3
0.06
0.084
5.23
0.83
0.82
HP
5.5
5.6
5.5
0.06
0.084
5.53
1.57
1.57
I
6.8
4.7
5.0
1.14
2.470
5.50
1.49
1.48
ID
3.5
2.0
4.6
1.31
3.274
3.37
-3.79
-3.79
J
4.0
4.8
4.8
0.46
0.675
4.53
-0.90
-0.91
JE
5.0
6.0
5.1
0.55
0.844
5.37
1.16
1.15
JG
2.7
4.3
4.5
0.99
1.988
3.83
-2.63
-2.64
JK







•
JN







•
JP








JS
5.2
5.7
5.3
0.26
0.422
5.40
1.24
1.24
JX
4.7
5.2
5.4
0.36
0.591
5.10
0.50
0.49
JY
8.7
10.4
6.9
175
4.721
8:67
9.33
9,32 x
K
5.6
4.7
4.2
0.71
1.345
4.83
-0.16
-0.16
KH
4.8
5.2
5.0
0.20
0.338
5.00
0.25
0.25
KL
5.8
4.3
6.0
0.93
1.828
5.37
1.16
1.15
KT







>•
L
4.0
3.5
3.8
0.25
0.422
3.77
-2.80
-2.80
LF







•
LH







«
LT
5.8
4.7
6.2
0.78
1.506
5.57
1.66
1.65
LZ
4.2
3.8
4.0
0.20
0.338
4.00
-2.22
-2.23
M
4.0
4.1
4.1
0.06
0.084
4.07
-2.05
-2.06
MX







;
-------
12 / 20 CRD-LV Performance Evaluation: Uranium-Radium in Water, 21-Jun-1996
Radium-226
Lab Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known) Tag
PV
6.5
6.3
5.4
0.59
0.928
6.07
2.89
2.89

PW
4.6
6.0
3.9
1.07
2.470
4.83
-0.16
-0.16

PX
5.5
5.1
5.1
0.23
0.338
5.23
0.83
0.82

Q
5.5
5.4
5.9
0.26
0.422
5.60
1.74
1.73

QJ









QM
5.2
5.3
5.4
0.10
0.169
5.30
1.00
0.99

QQ
4.0
3.6
3.8
0.20
0.338
3.80
-2.71
-2.72

QU
2.8
8.4
7.1
0.65
1.185
7.77
7 10
7.09
X
QX
4.1
4.9
5.1
0.53
0.844
4.70
-0.49
-0.49

QZ
4.6
5.0
4.7
0.21
0.338
4.77
-0.32
-0.33

R
4.5
3.7
3.7
0.46
0.675
3.97
-2.30
-2.31

RD
6.4
6.6
6.4
0.12
0.169
6.47
3.88
3.88
ft
RF
5.0
5.2
5.3
0.15
0.253
5.17
0.67
0.66

RG








•
RK
5.4
4.5
4.7
0.47
0.759
4.87
-0.08
-0.08

RP








;V
RR








-V
RX
IU.4
ll.U
y.4
U.81
1.667
10.27
13J29
13.28
:x-'
RZ
4.3
4.5
4.3
0.12
0.169
4.37
-1.31
-1.32

S
5.0
4.9
4.7
0.15
0.253
4.87
-0.08
-0.08

sc
5.2
4.4
4.7
0.40
0.675
4.77
-0.32
-0.33

SD
5.4
5.5
4.9
0.32
0.506
5.27
0.91
0.91

SF
4.5
4.4
4.3
0.10
0.169
4.40
-1.23
-1.24

SI
16.6
16.5
12.2
2.48
6.006
15.07
2516
25.16
X
SL









SM
6.2
6.0
4.9
0.70
1.185
5.70
1.99
1.98

SO









ss
4.6
4.9
4.5
0.21
0.338
4.67
-0.57
-0.58

sx
5.2
5.7
5.2
0.29
0.422
5.37
1.16
1.15

sz
5.2
4.7
4.7
0.29
0.422
4.87
-0.08
-0.08

T
4.8
5.1
5.0
0.15
0.253
4.97
0 17
0.16

TD
21.4
18.7






0
TH








%¦
TL








¦¦w-
TN
4.1
4.8
4.6
0.36
0.591
4.50
-0.98
-0.99

TQ
5.5
5.0
5.5
0.29
0.422
5.33
1.08
1.07

TS









U
5.0
5.3
5.0
0.17
0.253
5.10
0.50
0.49

UE
8.6
R.7
9.7
0.61
0.928
9.00
io;i5
10.14
fc
UN









UP
5.2
4.8
5.0
0.20
0.338
5.00
0.25
0.25

UQ
4.8
5.1
4.7
0.21
0.338
4.87
-0.08
-0.08

UZ









VA
8:2
6.7
9.5
0.81
1.506
913:
10.48
10;47v
:vx;
VH
6.1
6.5
5.2
0.67
1.185
5.93
2.56
2.56

• =
No data submitted

TAG SYMBOLS

IT = Above control limit
0 s Insufficient data	x = Determined to be an outlier	II ~ j3elowjgntroHimit
-------
f	










CRD-LV Performance Evaluation: Uranium-Radium in Water, 21-Jun-1996 13 / 20
Radium-226








Lab
Res. 1
Res. 2

Exper.
Rng anal

Normalized deviation

Res. 3
Sigma
(R + SR)
Average
(grand-avg)
(known) Tag
VI
4.5
4.1
4.1
0.23
0.338
4.23
-1.64
-1.65

W
5.0
4.6
5.1
0.26
0.422
4.90
0.01
0.00

wc
14.0
19.7
19.2
3.16
8.257
17:63
.31:51
31.51
X
WG









WH
4.7
5.0
5.1
0.21
0.338
4.93
0.09
0.08

Wl









wo
7.9
7i9
b:o:
0.06
0.084
7.93
7;51
7i51
X
WQ








•
WR








<•
W8









wv








•
X
4.9
4.0
4.4
0.45
0.759
4.43
-1.15
-1.15

Data sorted by Laboratory Average
Average
Tag
Lab
Average
Tag
Lab
Average
Tag
Lab
2.87
U
AU
4.70

QX
5.10

JX
3.37

ID
4.77

sc
5.13

BK
3.73

OY
4.77

Qz
5.13

AW
3.77

L
4.77

PG
5.17

RF
3.80

QQ
4.77

N
5.17

AK
3.80

GQ
4.80

CG
5.20

EO
3.83

JG
4.80

CA
5.23

PX
3.93

AJ
4.80

AF
5.23

HL
3.97

AZ
4.83

PW
5.27

SD
3.97

R
4.83

K
5.30

QM
4.00

LZ
4.87

SZ
5.30

AE
4.07

M
4.87

UQ
5.33

TQ
4.10

OF
4.87

S
5.37

SX
4.23

VI
4.87

RK
5.37

KL
4.33

BA
4.90

W
5.37

JE
4.37

RZ
4.93

WH
5.40

JS
4.37

C
4.93

EB
5.40

EL
4.37

AL
4.97

T
5.40

DE
4.40

SF
4.97

BO
5.43

NO
4.43

X
4.97

BC
5.47

PB
4.50

TN
5.00

UP
5.47

CS
4.53

J
5.00

NT
5.50

I
4.57

DT
5.00

KH
5.50

CJ
4.60

CE
5.00

DZ
5.53

HP
4.60

BM
5.03

HK
5.57

LT
4.60

BH
5.03

E
5.60

Q
4.60

AP
5.07

ER
5.60

GN
4.63

NJ
5.07

DB
5.70

SM
4.67

SS
5.10

U
5.83

FN
4.70

EP
5.10

P
5.93

VH
• = No data submitted
0 = Insufficient data

TAG SYMBOLS
x = Determined to be an outlier
tr
s Above control limit
ee Below control limit
-------
14 / 20 CRD-LV Performance Evaluation: Uranium-Radium in Water, 21-Jun-1996
Radium-226
Data sorted by Laboratory Average
Average
Tag
Lab
Average
Tag
Lab
Average
Tag
Lab
6.00

NH
7.77
X
QU
9.73
X
CC
6.07

PV
7.93
X
wo
10.27
X
RX
6.47
It
RD
8.67
X
JY
15.07
X
SI
6.73
tr
BN
9.00
X
UE
17.00
X
BG
7.73
X
O
9.13
X
VA
17.63
X
WC

% responding labs
Frequency distribution
10-
•2	0	+2	+4
Normalized deviation of the mean from the known value
% responding labs
Frequency distribution
10-
Irtauiil
hcit
"p
-4	-2	0	+2
Normalized deviation of the mean from the grand average
-I-
+4
0
= No data submitted
s Insufficient data
TAG SYMBOLS
x = Determined to be an outlier
ff = Above control limit
II = Below control limit
-------
CRD-LV Performance Evaluation: Uranium-Radium in Water, 21-Jun-1996 15/20 1
Radium-228	Statistical Summary	147 Participants
The known value of this nuclide is 9.0 pCi/1 with an expected precision of 2.3; the control limits
are 5.0 to 13.0; the warning regions sire 5.0 to 6.3 and 11.7 to 13.0
51(34.7 %) Failed to respond ,
10(6.8 %) Outliers • —
; 76(51.7 %) Within all limits
2(1.4 %) Out of control
but not an outlier
r
Statistic
I I
Respondents
8(5.4 %) In warning zone
but within control
Non-outliers
Mean
10.20
Grand Avg 8.84
Std. Dev.
5.88
1.51
Variance
34.55
2.28
% Coef. of Var.
57.63
17.07
% deviation of mean from known value
13.33
-1.74
Norm. dev. of mean from known value
0.20
-0.10
Median
9.20
9.05
% deviation of median from known value
2.22
0.56
Norm. dev. of median from known value
0.03
0.03
12(12.5 %) More than 3 norm. S.D.
8(8.3 %) Between 2 and 3 norm. S.D. •
, 65(67.7 %) Within 1 norm. S.D.
f
!	of known value
11(11.5 %) Between 1 and 2 norm. S.D.
-------
16/20 CRD-LV Performance Evaluation: Uranium-Radium in Water, 21-Jun-1996
Radium-22 8
Lab Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known) Tag
A
9.4
9.8
9.9
0.26
0.128
9.70
0.65
0.53
AE
8.7
8.8
7.4
0.78
0.360
8.30
-0.41
-0.53
AF
10.6
11.0
11.0
0.23
0.103
10.87
1.52
1.41
AH
8.6
10.0
9.4
0.70
0.360
9.33
0.37
0.25
AJ
6.7
6.3
5.2
0.78
0.385
6.07
-2.09
-2.21
AK
9.7
9.5
9.1
0.31
0.154
9.43
0.44
0.33
AL
7.0
7.9
7.7
0.47
0.231
7.53
-0.99
-1.10
AP
5.4
5.8
6.8
0.72
0.360
6.00
-2.14
-2.26
AR







•
AU







•
AW
9.3
9.8
9.3
0.29
0.128
9.47
0.47
0.35
AZ
7.2
7.4
9.1
1.04
0.488
7.90
-0.71
-0.83
BA
9.0
8.2
7.4
0.80
0.411
8.20
-0.48
-0.60
BC
10.2
10.1
9.6
0.32
0.154
9.97
0.85
0.73
BG







*
BH
9.6
10.1
9.2
0.45
0.231
9.63
0.59
0.48
BK
8.4
9.2
9.5
0.57
0.282
9.03
0.14
0.03
BM
8.2
9.1
9.3
0.59
0.282
8.87
0.02
-0.10
BN







•
BO
10.0
9.0
9.5
0.50
0.257
9.50
0.49
0.38
C
9.7
10.0
9.0
0.51
0.257
9.57
0.54
0.43
CA
8.1
9.1
8.8
0.51
0.257
8.67
-0.13
-0.25
CC
22.6
21.8
21.4
0.61
0.308
21.93
9.86
9.74 x
CE
7.3
8.4
7.6
0.57
0.282
7.77
-0.81
-0.93
CG
8.1
9.0
9.2
0.59
0.282
8.77
-0.06
-0.18
CJ
10.0
9.2
10.0
0.46
0.205
9.73
0.67
0.55
CM







•
CS
11.8
12.1
11.4
0.35
0.180
11.77
2.20
2.08
cx







•
D







•
DB
10.6
10.4
9.2
0.76
0.360
10.07
0.92
0.80
DE
9.1
9.2
9.3
0.10
0.051
9.20
0.27
0.15
DI







•
DO







•
DT
112.0
10.3
12.3
58.15
48.843
44.87
27.13
7.01 x
DZ
8.5
9.1
8.7
0.31
0.154
8.77
-0.06
0.18
E .







• ;
EB
6.1
5.4
7.6
1.12
0.565
6.37
-1.87
1.98
EL
7.0
8.3
8.9
0.97
0.488
8.07
-0.58
0.70
EO
9.8
10.5
10.2
0.35
0.180
10.17
1.00
0.88
EP
9.2
9.4
9.2
0.12
0.051
9.27
0.32
0.20
ER







•
]?J








FN
9.0
9.6
9.1
0.32
0.154
9.23
0.29
0.18
FZ
5.4
7.3
7.8
1.27
0.616
6.83
-1.51
-1.63
• s No data submitted	TAG SYMBOLS	ft = Above control limit
0 = Insufficient data	x = Determined to be an outlier	= Below control limit J
¦ 	y
-------
CRD-LV Performance Evaluation: Uranium-Radium in Water, 21-Jim-1996 17 / 20
Radium-228
Lab Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known) Tag
GN
7.2
7.5
7.2
0.17
0.077
7.30
-1.16
-1.28

GQ
2.6
2.6
2.6
0.00
0,000
2.60
4,70
-4>82
X
HK
8.7
8.5
8.8
0.15
0.077
8.67
-0.13
-0.25

HL
8.9
9.4
8.4
0.50
0.257
8.90
0.04
-0.08

HP
6.6
9.6
9.9
1.82
0.847
8.70
-0.11
-0.23

I
5.4
6.1
6.2
0.44
0.205
5.90
-2.22
-2.33

ID
9.1
9.4
8.7
0.35
0.180
9.07
0.17
0.05

J
8.1
8.7
8.8
0.38
0.180
8.53
-0.23
-0.35

JE,









JG
6.7
7.4
4.4
1.57
0.770
6.17
-2.02
-2.13

JK








*
JN








•
JP









JS
7.5
8.2
8.2
0.40
0.180
7.97
-0.66
-0.78

JX
8.7
7.6
7.0
0.86
0.437
7.77
-0.81
-0.93

JY
12.0
14.0
14.0
1.15
0.514
13.33
3.38
3.26
IT
K
10.0
9.0
11.1
1.05
0.539
10.03
0.90
0.78

KH
10.5
9.9
10.0
0.32
0.154
10.13
0.97
0.85

KL
11.9
10.5
9.9
1.03
0 514
1ft 77
1.45
1.33

KT








if;
L
9.9
9.7
9.7
0.12
0.051
9.77
0.70
0.58

LF








*
LH








•
LT

17.6
18.7
0.61
0:308
18.17
7;02
6.90

IiZ









M
8.6
8.0
7.0
0.81
0.411
7.87
-0.74
-0.85

MX









N
y.y
11.1
10.1
0.64
0.308
10.37
1.15
1.03

NA









NH
10.5
8.9
11.1
1.14
0.565
10.17
1.00
0.88

NJ
8.3
8.1
8.2
0.10
0.051
8.20
-0.48
-0.60

-Nit;








r
NO
9.2
10.6
11.1
0.98
0.488
10.30
1.10
0.98

NT
8.8
8.5
8.6
0.15
0.077
8.63
-0.16
-0.28

O
6.1
8.9
8.7
1.56
0.719
7.90
-0.71
-0.83

OB









OF
6.5
3.3
3.2
1.88
0.847
4.33
-3.40
-3.51
i
OM









OS








•
OX








i*
OY
10.4
9.8
10.0
0.31
0.154
10.07
0.92
0.80

P
6.4
8.3
6.9
0.98
0.488
7.20
-1.24
-1.36

PB
9.8
10.0
9.6
0.20
0.103
9.80
0.72
0.60

PG









PQ








•
• =
0 m
No data submitted
Insufficient data
x ==
TAG SYMBOLS
Determined to be an outlier
IT s Above control limit
U = Below control limit
-------
	








	
18 / 20 CRD-LV Performance Evaluation: Uranium-Radium in Water, 21-Jun-1996

Radium-228








Lab
Res. 1
Res. 2

Exper.
Rng anal

Normalized deviation

Res. 3
Sigma
(R + SR)
. Average
(grand-avg)
(known) Tag
PV
11.0
13.3
12.7
1.19
0.591
12.33
2.63
2.51

PW
9.5
9.8
9.7
0.15
0.077
9.67
0.62
0.50

FX









Q
7.3
8.4
8.7
0.74
0.360
8.13
-0.53
-0.65

QJ








v.®.
QM









QQ









QU
10.1
9.7
9.3
0.40
0.205
9.70
0.65
0.53

QX
9.4
10.3
10.0
0.46
0.231
9.90
0.80
0.68

QZ
9.1
9.1
9.0
0.06
0.026
9.07
0.17
0.05

R









RD
7.7
9.1
7.2
0.98
0.488
8.00
-0.64
-0.75

RF
9.6
9.6
9.6
0.00
0.000
9.60
0.57
0.45

RG









RK
22.4
22.6,
21.3
0.70
0.334
22.10
9.98
9.87
X
RP









RR








•
RX
7.4
8.5
7.8
0.56
0.282
7.90
-0.71
-0.83

RZ
9.6
9.2
9.6
0.23
0.103
9.47
0.47
0.35

S
7.5
8.2
7.9
0.35
0.180
7.87
-0.74
-0.85

sc
10.8
9.3
9.2
0.90
0.411
9.77
0.70
0.58

SD
9.4
10.5
9.6
0.59
0.282
9.83
0.75
0.63

SF
9.4
11.6
9.8
1.17
0.565
10.27
1.07
0.95

SI
25;0
31,7
30.7
3.61
2.373
29.13
15J28
15.16
X
SL









SM
5.4
5.6
5.4
0.12
0.051
5.47
-2.54
-2.66

SO









ss
9.1
8.9
8.2
0.47
0.231
8.73
-0.08
-0.20

sx
7.9
9.6
6.0
1.80
0.925
7.83
-0.76
-0.88

sz
4.5
5.2
8.2
1.97
0.950
5.97
-2.17
-2.28

T
9.4
10.1
10.6
0.60
0.308
10.03
0.90
0.78

TD
32; 6
36.9
318
2.76
1.590
J3.73
18.74
18.63
X
TH









TL









TN
8.1
8.5
10.2
1.12
0.539
8.93
0.07
-0.05

TQ
9.6
9.2
9.3
0.21
0.103
9.37
0.39
0.28

TS








»
U
7.5
6.1
6.5
0.72
0.360
6.70
-1.61
-1.73

UE
7.4
8.3
8.0
0.46
0.231
7.90
-0.71
-0.83

¦UN









UP
9.1
9.2
9.3
0.10
0.051
9.20
0.27
0.15

UQ
10.7
9.8
10.4
0.46
0.231
10.30
1.10
0.98

,'trz'









VA
3.2
2.2
2,9
0.61
0.267
2.77
f4;68
H.69
X
VH
11.6
8.8
9.4
1.47
0.719
9.93
0.82
0.70

• =
No data submitted

TAG SYMBOLS

It = Above control limit
0 =
V-	
Insufficient data
x =
Determined to be an outlier
Ji = Below control limit J
-------
CRD-LV Performance Evaluation: Uranium-Radium in Water, 21-Jun-1996 19/
20
Radium-228
Lab Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
VJ
7.8
7.4
7.0
0.40
0.205
7.40
w






wc
25.2
32;5
28.3
3:66
2.666
28:67
WG






WH
11.5
9.9
10.1
0.87
0.411
10.50
WI






WO
8.5
8.8
y.4
0.46
0.231
8.90
WQ






WR






ws






WV






Normalized deviation
-1.09
14193
1.25
0.04
-1.20
14 >81
1.13
-0.08
I7i3
13.9
12.7
2.39
1.346
14.63
4;36
Data sorted by Laboratory Average
x
-•
4.24
X
Average
Tag
Lab
Average
Tag
Lab
Average
Tag
Lab
2.60
X
GQ
8.20

BA
9.67

PW
2.77
X
VA
8.30

AE
9.70

QU
4.33

OF
8.53

J
9.70

A
5.47

SM
8.63

NT
9.73

CJ
5.90

I
8.67

HK
9.77

L
5.97

sz
8.67

CA
9.77

SC
6.00

AP
8.70

HP
9.80

PB
6.07

AJ
8.73

SS
9.83

SD
6.17

JG
8.77

DZ
9.90

QX
6.37

EB
8.77

CG
9.93

VH
6.70

U
8.87

BM
9.97

BC
6.83

FZ
8.90

HL
10.03

T
7.20

P
8.90

WO
10.03

K
7.30

GN
8.93

TN
10.07

OY
7.40

VI
9.03

BK
10.07

DB
7.53

AL
9.07

QZ
10.13

KH
7.77

JX
9.07

ID
10.17

NH
7.77

CE
9.20

UP
10.17

EO
7.83

sx
9.20

DE
10.27

SF
7.87

s
9.23

FN
10.30

UQ
7.87

M
9.27

EP
10.30

NO
7.90

O
9.33

AH
10.37

N
7.90

UE
9.37

TQ
10.50

WH
7.90

RX
9.43

AK
10.77

KL
7.90

AZ
9.47

RZ
10.87

AF
7.97

JS
9.47

AW
11.77

CS
8.00

RD
9.50

BO
12.33

PV
8.07

EL
9.57

C
13.33
tr
JY
8.13

Q
9.60

RF
14.63
X
X
8.20

NJ
9.63

BH
18.17
X
LT
• 2 No data submitted
0 = Insufficient data

TAG SYMBOLS
x = Determined to be an outlier
tr
s Above control limit
= Below control limit
-------
20/20 CRD-LV Performance Evaluation: Uranium-Radium in Water, 21-Jun-1996
Radium-228
Average
Data sorted by Laboratory Average
Tag	Lab Average	Tag	Lab Average
Tag_
Lab
21.93
22.10
x
x
CC
RK
28.67
29.13
x
x
WC
SI
33.73
44.87
x
x
TD
DT
responding labs
Frequency distribution
% responding labs
-4	-2	0	+2
Normalized deviation of the mean from the known value
Frequency distribution
10-

-EL.
lai
—
t-
+4
-r~
+6
-r
+2
-4	-2	0
Normalized deviation of the mean from the grand average
0
= No data submitted
= Insufficient data
TAG SYMBOLS
x h Determined to be an outlier
It = Above control limit
JJ = Below control limit
-------
United States
Environmental Protection
Agency
Office of Research and
Development
Washington, DC 20460
EPA/600/R-96/121
October 1996
Strontium in Water
Performance Evaluation
Study
A Statistical Evaluation of
the July 12, 1996 Data
		023RSL96 cov*121
m
-------
Strontium in Water
Performance Evaluation Study
July 12, 1996
Environmental Protection Agency
National Exposure Research Laboratory
Characterization Research Division
Las Vegas, Nevada
-------
UNITED STATES ENVIRONMENTAL PROTECTION AGENCY
OFFICE OF RESEARCH AND DEVELOPMENT
NATIONAL EXPOSURE RESEARCH LABORATORY
CHARACTERIZATION RESEARCH DIVISION-LAS VEGAS
P.O. BOX 93478
LAS VEGAS, NEVADA 89193-3478
(702/798-2100)
Dear Participant,
Enclosed are the results of the Analytical Sciences Branch (CRD-LV)
Performance Evaluation Study for Strontium in Water; July 12,1996.
The known value for each analysis was determined by gravimetric methods,
checked by chemical analyses performed by CRD-LV's Radiochemlstry Laboratory,
and compared to the participating laboratories' grand average.
The expected precision, determined by the known value, was taken from
Table 3. Laboratory Precision: One Standard Deviation Values and Control Limits
for Various Analyses", which is based on data accumulated over the years by the
Performance Evaluation Program, and can be found in the Environmental Radioactivity
Performance Evaluation Studies Program and Radioactive Standards Distribution
Program information brochure.
Please take a few minutes to review this report and the analytical data your
laboratory submitted to us. If there are any apparent discrepancies, please notify us
immediately.
We encourage you to make use of the computer-automated data-entry system
that has been in place for some time now. As the number of participants increases,
and it becomes unrealistic for us to receive results by mail or FAX, the computer
system will be our only avenue for accepting data.
If you have any questions or comments, please send a message via the data-entry
system or contact Stephen Pla at 702/798-2102 or Patricia Honsa at 702/798-2141.
Stephen Pla
Team Leader
RADQA Program
Enclosure
-------
NOTICE
This material has been funded wholly by
the U.S. Environmental Protection Agency.
It has been subjected to the Agency's review,
and has been approved for publication as
an EPA document.
-------
CRD-LV Performance Evaluation: Strontium in Water, 12-Jul-1996	1/12
The following pages consist of separate sections for each of the nuclides in this study with four
parts per section. After the first, each part is separated from the next hy a new page or a thick
horizontal bar. The first page of each section is a statistical summary for the nuclide and starts
with a statement of the known value, the control limits, and the warning limits.
The warning limits are placed at two normalized standard deviations above and below the
known value and the control limits are three normalized standard deviations above and below
the known value. If you keep control charts, these values will be useful for anticipating problems
with the accuracy of your analytical methods.
The coin shaped pie chart at the top of the summary page shows the fate of all the samples
sent out in number and percentage terms. The pie chart starts at the top and rotates clockwise.
The first sector represents those participants who submitted analytical results within both the
warning and control limits. The next sector represents those who are in the warning region but
not out of control. The third sector represents those who are out of control, but have passed
the outlier test. The fourth sector represents those who have failed the outlier test. The last
sector represents those participants who have failed to respond properly. This is the case if no
analytical results were returned, or less than three determinations were reported, or if the results
were received too late. The reeding on the edge of the coin is spaced at one percent intervals, and
the sector shading becomes darker as the data reliability decreases. Sectors with zero width are
not shown.
The table in the center shows a number of statistical quantities calculated from the submitted
data based on the mean and median values in relation to the known value, both before and after
outlier removal. The lower pie chart uses the same construction as the upper chart and shows
the distribution of properly submitted data in terms of deviation from the known value divided
into sectors representing one, two, three, and greater than three normalized standard deviations.
The second part is an alphabetical listing, in lab-code order, of submitted data and several
calculated quantities. An entry that is shaded has been rejected because of one of the reasons
listed above or failure of the outlier test. The filth and sixth columns are a measure of laboratory
precision. The Range analysis is a normalized value that you may use to keep precision control
charts. The eighth and ninth columns are the differences from the mean of all non-outliers and
from the known value, respectively. If this value is between 2.0 and 3.0, your analytical process
precision is in the warning zone; if it exceeds 3.0 it is out of control. A tag symbol may appear in
the last column. Each page with tags has a symbol definition summary at the bottom. If there is
no tag symbol, the data is within the control limits, but it may be in the warning zone.
The third part is a three-column listing of result average, tag symbol, and lab-code in average
order excluding those labs not responding properly. In this order, all outliers and out-of-control
results appear at the top or bottom of the list.
The last part is two bar chart displays showing frequency distributions of responding
participants. The first chart places the known value at the center and a bar at each 0.2 unit of
expected precision. The second chart places the mean of the reported measurements at the center
and a bar at each 0.2 unit of standard deviation. In both cases, a bar includes those results within
0.1 unit up to the minimum of six. Any results more than six units from the center value are
shown cumulatively by a shaded bar one past the sixth unit. If the central tendency of the known
value distribution falls away from the center, an error in accuracy is indicated. If the distribution
is broad, poor precision is indicated. The mean value distribution is similar but uses the average
and standard deviation of reported results as its basis.
-------
2/12	CRD-LV Performance Evaluation: Strontium in Water, 12-Jul-1996
The Range AnalyaiB(R + SR) is calculated from the range, mean range and standard enror of
the range values. The range is the difference between the maximum and minimum results for the
laboratory. The mean range is calculated by multiplying the expected precision by 1.693{for three
results). The standard error of the range is calculated by multiplying the mean range by 2.575(for
three results), subtracting the mean range from this product, and dividing the result by 3. If the
range is greater than the mean range, then the range analysis is calculated by subtracting the
mean range from the range, dividing the result by the standard error of the range and adding 1.
If the mean range is greater than or equal to the range, then the range analysis is calculated by
dividing the range by the mean range.
The normalized deviation of the mean from the grand average is calculated from the deviation
of the mean from the grand average and the standard error of the mean values. The deviation of
the me sua from the grand average is calculated by subtracting the grand average from the
average of the laboratory's three results. The standard error of the mean is calculated by
dividing the expected precision by the square root of 3(the number of results). The normalized
deviation of the mean from the grand average is calculated by dividing the deviation of the mean
from the grand average by the standard error of the mean.
The normalized deviation of the mean from the known value is calculated from the deviation of
the mean from the known value and the standard error of the mean values. The deviation of the
mean from the known value is calculated by subtracting the known value from the average of the
laboratory's three results. The standard error of the mean is calculated by dividing the expected
precision by the square root of 3(the number of results). The normalized deviation of the mean
from the known value is calculated by dividing the deviation of the mean from the known value by
the standard error of the mean.
A complete explanation of the statistical calculations involved in the report may be found in
the Environmental Radioactivity Performance Evaluation Studies Program information brochure
[Draft Revision of EPA-600/4-81-004], available from Patricia Honsa, CRD-LV, 702/798-2141.
-------
CRD-LV Performance Evaluation: Strontium in Water, 12*JuM9M
3/12
Strontiom-89	Statistical Summary	. 99 Participants
The known value of this nuclide is 25.0 pCi/I with an expected precision of 5.0; the control limits
are 16.3 to 33.7; the warning regions are 16.3 to 19.2 and 30.8 to 33.7
18(16.2 %) Failed to respond ».
66(36,7 %) Within an HmKs

6(6.1 °/o> Outliers * / XK
3(3.0 %) Out o1 control •
but not en outlier
Statistic
—
Respondents
6(6.1 %) In warning zone
but within control
Non-outliers
Mean
23.88
Grand Avg 23.88
Std. Dev.
8.30
3.73
Variance
68.90
13.88
% Coef. ofVar.
34.76
15.60
% deviation of mean From known, value
-4.48
-4.46
Norm* dev. of mean from known value
-0.13
-0.3Q
Median
24.00
24.33
% deviation of median from knows value
-4.00
-2.67
Norm. dev. of median from known value
-0.12
-0.18
9(11.1 %) More than 3 norm. S.O
6(7.4 %) Between 2 and 3 norm. S.O.!
; 44(54.3 %) Within 1 norm. S.D.
«
of known value
22(27.2 %) Batween 1 and 2 norm. S.O.
-------
4/12	CRD-LV Performance Evaluation: Strontium in Water, 12-JuM996
—	—	¦	i	—	¦ i
Strontium-8 9
Lab
Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average'
Normalized deviation
(grand-avg) (known) Tag
A
23.0
21.0
25.0
2.00
0.473
23.00
-0.31
-0.69
AE
24.0
28.0
26.0
2.00
0.473
26.00
0.73
0.35
AF
24.0
25.0
24.0
0.58
0.118
24.33
0.16
-0.23
AJ
27.0
24.0
27.0
1.73
0.354
26.00
0.73
0.35
AK
24.0
27.0
27.0
1.73
0.354
26.00
0.73
0.35
AL
26.0
27.0
25.0
1.00
0.236
26.00
0.73
0.35
AU
32.0
27.0
30.0
2.52
0.591
29.67
2.00
1.62
AW







%
AV








AZ
24.0
26.0
23.0
1.53
0.354
24.33
0.16
-0.23
BA
24.0
27.0
23.0
2.08
0.473
24.67
0.27
-0.12
BB
11,0
10.0
"UM
0:68,
0.118


mW: ;xs
BC
21.0
220
23.0
1.00
0.236
22.00
-0.65
-1.04
BO








BH
21.0
21.0
19.0
1.15
0.236
20.33
-1.23
-1.62
BL
27.0
27.0
23.0
2.31
0.473
25.67
0.62
0.23
BM
27.0
25.0
28.0
1.53
0.354
26.67
0.96
0.58
BO
25.0
24.0
25.0
0.58
0.118
24.67
0.27
-0.12
C
31.0
32.0
32.0
0.58
0.118
31.67
2.70
2.31
CA
24.0
26.0
22.0
2.00
0.473
24.00
0.04
-0.35
CE








CG
14.0
14.0
16.0
1.15
0.236
14.67
-3.19
-3.58 i
CJ
23.0
24.0
21.0
1.53
0.354
22.67
-0.42
-0.81
CO
19.0
21.0
22.0
1.53
0.354
20.67
-1.11
-1.50
cs
24.0
23.0
21.0
1.53
0.354
22.67
-0.42
-0.81
cx
14.0
15.0
10.0
2.65
0.591
13.00
-3.77
-4.16 4
D
24.0
24.0
24.0
0.00
0.000
24.00
0.04
-0.35
DD
27.0
30.0
31.0
2.08
0.473
29.33
1.89
1.50
DE
26.0
26.0
26.0
0.00
0.000
26.00
0.73
0.35
DO
28.0
30.0
28.0
1.15
0.236
28.67
1.66
1.27
DT
24.0
26.0
21.0
2.52
0.591
23.67
-0.08
-0.46
DZ
27.0
28.0
29.0
1.00
0.236
28.00
1.43
1.04
E
22.0
24.0
24.0
1.15
0.236
23.33
-0.19
-0.58
EB
26.0
27.0
27.0
0.58
0.118
26.67
0.96
0.58
EL
23.0
26.0
24.0
1.53
0.354
24.33
0.16
-0.23
FZ
26.0
14.0
37.0
11.50
4.271
25.67
0.62
0.23
GQ
32.0
29.0
31.0
1.53
0.354
30.67
2.35
1.96
HK
22.0
23.0
21.0
1.00
0.236
22.00
-0.65
-1.04
HP
14.0
15.0
16.0
1.00
0.236
15.00
-3.08
-3.46 U
I
25.0
24.0
26.0
1.00
0.236
25.00
0.39
0.00
J
23.0
24.0
22.0
1.00
0.236
23.00
-0.31
-0.69
«J III
22.0
19.0
21.0
1.53
0.354
20.67
-1.11
-1.50
JS
2.0
£3
io
0.58
0.118
2 38

WM *
JY
23.0
24.0
21.0
1.53
0.354
22.67
0.42
-0.81
K
24.0
20.0
23.0
2.08
0.473
22.33
-0.54
-0.92
• 2
No data submitted

TAG SYMBOLS

ft s Above control limit
0 = Insufficient data	x = Determined to be an outlier	JJ = Below control limit
^	. ¦	v
-------
	 ^
CRD-LV Performance Evaluation: Strontium in Water, 12-Jul-1996 5/12
Strontium-89
Lab Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known) Toe
KU
21.0
23.0
22.0
1.00
0.236
22.00
-0.65
-1.04
KL







KX
12.0
19.0
19.0
4.04
0.827
16.67
¦2.50
-2.89
L
26.0
27.0
28.0
1.00
0.236
27.00
1.08
0.69
LE
19.0
21.0
23.0
2.00
0.473
21.00
-1.00
-1.39
LF
32.0
30.0
29.0
1.53
0.354
30.33
2.23
1.85
LT
20.0
22.0
23.0
1.53
0.354
21.67
-0.77
-1.15
M

104
8.0
1.15
0<236
8.8?

jm *
N
22.0
25.0
24.0
1.53
0.354
23.67
-0.08
-0.46
NJ
22.0
21.0
20.0
100
0.236
21.00
-1.00
-1.39
••
NO







NT
24.0
27.0
30.0
3.00
0.709
27.00
1.08
0.69
OA
19.0
25.0
25.0
3.46
0.709
23.00
-0.31
-0.69
PB
25.0
25.0
26.0
0.58
0.118
25.33
0.50
0.12
PV
23.0
17.0
17.0
3.46
0.709
19.00
-1.69
-2.08
Q
16.0
19.0
17.0
1.53
0.354
17.33
-2.27
•2.66








QM
32.0
29.0
28.0
2.08
0.473
29.67
2.00
1.62
QU
24.0
25.0
23.0
1.00
0.236
24.00
0.04
-0.35
QW
20.0
22.0
25.0
2.52
0.591
22.33
-0.54
-0.92
QZ
25.0
25.0
26.0
0.58
0.118
25.33
0.50
0.12
R
21.0
22.0
22.0
0.58
0.118
21.67
-0.77
-1.15
RF
21.0
16.0
19.0
2.52
0.591
18.67
-1.81
-2.19
RK
3010
38.0
49.0
6:08
1670
42.00
£28
5:89 *<
RR
26.0
25.0
24.0
1.00
0.236
25.00
0.39
0.00
S
24.0
26.0
26.0
1.15
0.236
25.33
0.50
0.12
sc
21.0
21.0
21.0
0.00
0.000
21.00
-1.00
-1.39
SD
23.0
23.0
17.0
3.46
0.709
21.00
-1.00
-1.39
SF
28.0
27.0
27.0
0.58
0.118
27.33
1.19
0.81
SI
24.0
26.0
24.0
1.15
0.236
24.67
0.27
-0.12
SM
33.0
29.0
31.0
2.00
0.473
31.00
2.46
2.08
SS
20.0
23.0
24.0
2.08
0.473
22.33
-0.54
-0.92
SZ
22.0
25.0
20.0
2.52
0.591
22.33
-0.54
-0.92
T
25.0
25.0
24.0
0.58
0.118
24.67
0.27
-0.12
TD
7810
700
770
1.00
0.236
77.00*
wm
flf
-------
6/12
CRD-LV Performance Evaluation: Strontium in Water, 12-Jul-191Hi
Strontium-89
Lab Res. 1 Res.2
Exper. Rng anal	Normalized deviation
H
• = No data submitted	TAG SYMBOLS	fl a Above control limit
0 s Insufficient data	x a Determined to be an outlier	^ a Below control limit
-------
¦ ¦	^y:
CRD-LV Performance Evaluation: Strontium in Water, 12-JuI-1996	7/12
Strontium-89
% responding labs	Frequency distribution
10-
rtiii ¦f¦ iip
-2	0	+2
¦ I ~ T	I	........
-6	-4	-2	6+2+4
Normalized deviation of the mean from the known value
% responding labs	Frequency distribution
10-

, , jJifLln ,
-6	-4	-2	0	+2	+4
Normalized deviation of the mean from the grand average
-------
CRD-LV Performance Evaluation: Strontium in Water, 12-Jul-1996	8/12
Strontium-90	Statistical Summary	99 Participants
The known value of this nuclide is 12.0 pCi/1 with an expected precision of 5.0; the control limits
are 3.3 to 20.7; the warning regions are 3.3 to 6.2 and 17.8 to 20.7
Statistic	Respondents	Non-outliers
Mean
11.79
Grand Avg 11.79
Std. Dev.
2.47
2.47
Variance
6.09
6.09
% Coef. of Var.
20.92
20.92
% deviation of mean from known value
-1.74
-1.74
Norm. dev. of mean from known value
•0.08
-0.08
Median
11.33
11.33
% deviation of median from known value
-5.56
-5.56
Norm. dev. of median from known value
-0.27
-0.27
-------
'
9/12 CRD-LV Performance Evaluation:
Strontium in Water, 12-Jul-1996
	A.
Strontium-90







Lab
Res. 1
Res. 2
Res. 3
Exper.
Rng anal

Normalized deviation
Sigma
(R + SR)
Average
(grand-avg)
(known) Tag
A
11.0
11.0
11.0
0.00
0.000
11.00
-0.27
-0.35
AE
12.0
10.0
11.0
1.00
0.236
11.00
-0.27
-0.35
AF
12.0
12.0
12.0
0.00
0.000
12.00
0.07
0.00
AJ
12.0
11.0
10.0
1.00
0.236
11.00
-0.27
-0.35
AK
12.0
10.0
10.0
1.15
0.236
10.67
-0.39
-0.46
AL
11.0
12.0
11.0
0.58
0.118
11.33
-0.16
-0.23
AU
11.0
10.0
11.0
0.58
0.118
10.67
-0.39
-0.46
AW







m
AY








AZ
13.0
13.0
14.0
0.58
0.118
13.33
0.53
0.46
BA
10.0
11.0
11.0
0.58
0.118
10.67
-0.39
-0.46
BB
11.0
10.0
11.0
0.58
0.118
10.67
-0.39
-0.46
BC
11.0
11.0
10.0
0.58
0.118
10.67
-0.39
-0.46
BG
11.0
11.0
10.0
0.58
0.118
10.67
-0.39
-0.46
BH
13.0
14.0
14.0
0.58
0.118
13.67
0.65
0.58
BL
12.0
11.0
10.0
1.00
0.236
11.00
-0.27
-0.35
BM
11.0
11.0
11.0
0.00
0.000
11.00
-0.27
-0.35
BO
10.0
10.0
10.0
0.00
0.000
10.00
-0.62
-0.69
C
9.0
8.0
10.0
1.00
0.236
9.00
-0.97
-1.04
CA
12.0
12.0
10.0
1.15
0.236
11.33
-0.16
-0.23
CE
12.0
12.0
11.0
0.58
0.118
11.67
-0.04
-0.12
CG
14.0
14.0
14.0
0.00
0.000
14.00
0.77
0.69
CJ
13.0
13.0
11.0
1.15
0.236
12.33
0.19
0.12
CO
11.0
9.0
8.0
1.53
0.354
9.33
-0.85
-0.92
CS
14.0
14.0
14.0
0.00
0.000
14.00
0.77
0.69
CX
9.0
8.0
7.0
1.00
0.236
8.00
-1.31
-1.39
D
12.0
12.0
12.0
0.00
0.000
12.00
0.07
0.00
DD
12.0
11.0
11.0
0.58
0.118
11.33
-0.16
-0.23
DE
10.0
10.0
10.0
0.00
0.000
10.00
-0.62
-0.69
DO
7.0
10.0
9.0
1.53
0.354
8.67
-1.08
-1.15
DT
11.0
12.0
11.0
0.58
0.118
11.33
-0.16
-0.23
DZ
15.0
15.0
14.0
0.58
0.118
14.67
1.00
0.92
E
13.0
13.0
13.0
0.00
0.000
13.00
0.42
0.35
EB
10.0
12.0
14.0
2.00
0.473
12.00
0.07
0.00
EL
13.0
12.0
11.0
1.00
0.236
12.00
0.07
0.00
FZ
11.0
17.0
10.0
3.79
0.827
12.67
0.30
0.23
GQ
11.0
10.0
10.0
0.58
0.118
10.33
-0.50
-0.58
HK
10.0
10.0
10.0
0.00
0.000
10.00
-0.62
-0.69
HP
13.0
15.0
13.0
1.15
0.236
13.67
0.65
0.58
I
10.0
11.0
11.0
0.58
0.118
10.67
-0.39
-0.46
J
12.0
12.0
12.0
0.00
0.000
12.00
0.07
0.00
JE
11.0
13.0
10.0
1.53
0.354
11.33
-0.16
-0.23
JS
11.0
10.0
10.0
0.58
0.118
10.33
-0.50
-0.58
JY
12.0
11.0
10.0
1.00
0.236
11.00
-0.27
-0.35
K
12.0
12.0
12.0
0.00
0.000
12.00
0.07
0.00
• 3
No data submitted

TAG SYMBOLS

ft s Above control limit
0 3
Insufficient data
X 3
Determined to be an outlier
U = Below control limit
		
-------
f(	
k.
CRD-LV Performance Evaluation:
Strontium in Water, 12-Jul-1996
	
10/12
Strontium-90






*
Lab
Res. 1
Res. 2

Exper.
Rng anal

Normalized deviation
Res. 3
Sigma
(R + SR)
Average
(grand-avg)
(known) Tag
KH
13.0
13.0
13.0
0.00
0.000
13.00
0.42
0.35
KL








KX
11.0
9.0
9.0
1.15
0.236
9.67
-0.74
-0.81
L
12.0
11.0
11.0
0.58
0.118
11.33
-0.16
-0.23
LE
12.0
13.0
13.0
0.58
0.118
12.67
0.30
0.23
LF
10.0
10.0
11.0
0.58
0.118
10.33
-0.50
-0.58
LT
12.0
11.0
11.0
0.58
0.118
11.33
-0.16
-0.23
M
18.0
20.0
21.0
1.53
0.354
19.67
2.73
2.66
N
12.0
10.0
11.0
1.00
0.236
11.00
-0.27
-0.35
NJ
10.0
11.0
12.0
1.00
0.236
11.00
-0.27
-0.35
NO
20.0
21.0
20.0
0.58
0.118
20.33
2.96
2.89
NT
11.0
12.0
12.0
0.58
0.118
11.67
-0.04
-0.12
OA
10.0
10.0
10.0
0.00
0.000
10.00
-0.62
-0.69
PB
10.0
11.0
10.0
0.58
0.118
10.33
-0.50
-0.58
PV
10.0
13.0
12.0
1.53
0.354
11.67
-0.04
-0.12
Q
14.0
14.0
15.0
0.58
0.118
14.33
0.88
0.81
w







#;
QM
9.0
14.0
12.0
2.52
0.591
11.67
-0.04
-0.12
QU
12.0
11.0
12.0
0.58
0.118
11.67
-0.04
-0.12
QW
9.0
9.0
10.0
0.58
0.118
9.33
-0.85
-0.92
QZ
10.0
11.0
11.0
0.58
0.118
10.67
-0.39
-0.46
R
10.0
10.0
10.0
0.00
0.000
10.00
-0.62
-0.69
RF
17.0
19.0
15.0
2.00
0.473
17.00
1.80
1.73
RK
7.0
8.0
7.0
0.58
0.118
7.33
-1.54
-1.62
RR
12.0
12.0
12.0
0.00
0.000
12.00
0.07
0.00
S
12.0
11.0
11.0
0.58
0.118
11.33
-0.16
-0.23
sc
12.0
12.0
12.0
0.00
0.000
12.00
0.07
0.00
SD
13.0
11.0
12.0
1.00
0.236
12.00
0.07
0.00
SF
15.0
14.0
16.0
1.00
0.236
15.00
1.11
1.04
SI
11.0
11.0
11.0
0.00
0.000
11.00
-0.27
-0.35
SM
11.0
11.0
13.0
1.15
0.236
11.67
-0.04
-0.12
ss
13.0
12.0
12.0
0.58
0.118
12.33
0.19
0.12
sz
12.0
11.0
12.0
0.58
0.118
11.67
-0.04
-0.12
T
11.0
11.0
11.0
0.00
0.000
11.00
-0.27
-0.35
TD
18.0
21.0
21.0
1.73
0.354
20.00
2.84
2.77
TH








TL







"1
tQ







».
U
13.0
14.0
13.0
0.58
0.118
13.33
0.53
0.46
UB








UN
16.0
18.0
17.0
1.00
0.236
17.00
1.80
1.73
UP
4.0
5.0
5.0
0.58
0.118
4.67
-2.47
-2.54
VA
13.0
13.0
12.0
0.58
0.118
12.67
0.30
0.23
VH
10.0
11.0
13.0
1.53
0.354
11.33
-0.16
-0.23
VI
11.0
11.0
11.0
0.00
0.000
11.00
-0.27
-0.35
• 5
No data submitted

TAG SYMBOLS

ft s Above control limit
0 3
Vfc	
Insufficient data
X S
Determined to be an outlier
a Below control limit
'J
-------
11/12
CRD-LV Performance Evaluation:
Strontium in Water, 12-Jul-1996
¦ —\
Strontium-90







Lab
Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known) Tasr
W
W
11.0
10.0
12.0
1.00
0.236
11.00
-0.27
-0.35
WG
wi
12.0
12.0
11.0
0.58
0.118
11.67
-0.04
-0.12
WO








WR
W8
wv
18.0
18.0
18.0
0.00
0.000
18.00
2.15
2.08
FjI 1
X
9.0
10.0
9.0
0.58
0.118
9.33
-0.85
-0.92
Data sorted by Laboratory Average
Average
Tag
Lab
Average
Tag
Lab
Average
Tag
Lab
4.67

UP
11.00

T
12.00

RR
7.33

RK
11.00

SI
12.00

K
8.00

CX
11.00

NJ
12.00

J
8.67

DO
11.00

N
12.00

el
9.00

C
11.00

JY
12.00

EB
9.33

X
11.00

BM
12.00

D
9.33

QW
11.00

BL
12.00

AF
9.33

CO
11.00

AJ
12.33

SS
9.67

KX
11.00

AE
12.33

CJ
10.00

R
11.00

A
12.67

VA
10.00

OA
11.33

VH
12.67

LE
10.00

HK
11.33

S
12.67

FZ
10.00

DE
11.33

LT
13.00

KH
10.00

BO
11.33

L
13.00

E
10.33

PB
11.33

JE
13.33

U
10.33

LF
11.33

DT
13.33

AZ
10.33

JS
11.33

DD
13.67

HP
10.33

GQ
11.33

CA
13.67

BH
10.67

QZ
11.33

AL
14.00

CS
10.67

I
11.67

WG
14.00

CG
10.67

BG
11.67

SZ
14.33

Q
10.67

BC
11.67

SM
14.67

DZ
10.67

BB
11.67

QU
15.00

SF
10.67

BA
11.67

QM
17.00

UN
10.67

AU
11.67

PV
17.00

RF
10.67

AK
11.67

NT
18.00

WR
11.00

W
11.67

CE
19.67

M
11.00

VI
12.00
12.00

SD
SC
20.00
20.33

TD
NO
• s No data submitted

TAG SYMBOLS

It
s Above control limit
0 = Insufficient data

x s Determined to be an outlier
11
a Below control limit
-------
CRD-LV Performance Evaluation: Strontium in Water, 12-Jul-1996
12/12
Strontium-90
Frequency distribution



1			
	
L	
		 1
iL
¦—i—.—i—!—¦—, ¦¦¦*¦¦

Normalized deviation of the mean from the known value
% responding labs 	Frequency distribution
20'
10-
0—r
-6
¦ , ¦¦ f
-4	-2	0	+2
Normalized deviation of the mean from the grand average
-i—
+4
—T—
*6
-------
United States	Office of Research and	EPA/600/R-96/102
Environmental Protection	Development	August 1996
Agency	Washington, DC 20460
&EPA Gross Alpha-Beta in
Water Performance
Evaluation Study
A Statistical Evaluation of
the July 19,1996 Data
023RSL96 cov-102
-------
Gross Alpha-Beta in Water
Performance Evaluation Study
July 19, 1996
Environmental Protection Agency
National Exposure Research Laboratory
Characterization Research Division
Las Vegas, Nevada
-------

UNITED STATES ENVIRONMENTAL PROTECTION AGENCY
OFFICE OF RESEARCH AND DEVELOPMENT
NATIONAL EXPOSURE RESEARCH LABORATORY
CHARACTERIZATION RESEARCH DIVISION-LAS VEGAS
P.O. BOX 93478
LAS VEGAS, NEVADA 89193-3478
(702/798-2100)
Dear Participant,
Enclosed are the results of the Analytical Sciences Branch (CRD-LV)
Performance Evaluation Study for Gross Alpha-Beta in Water; July 19, 1996.
The known value for each analysis was determined by gravimetric methods,
checked by chemical analyses performed by CRD-LV's Radiochemistry Laboratory,
and compared to the participating laboratories' grand average.
The expected precision, determined by the known value, was taken from
'Table 3. Laboratory Precision: One Standard Deviation Values and Control Limits
for Various Analyses", which is based on data accumulated over the years by the
Performance Evaluation Program, and can be found in the Environmental Radioactivity
Performance Evaluation Studies Program and Radioactive Standards Distribution
Program information brochure.
Please take a few minutes to review this report and the analytical data your
laboratory submitted to us. If there are any apparent discrepancies, please notify us
immediately.
We encourage you to make use of the computer-automated data-entry system
that has been in place for some time now. As the number of participants increases,
and it becomes unrealistic for us to receive results by mail or FAX, the computer
system will be our only avenue for accepting data.
If you have any questions or comments, please send a message via the data-entry
system or contact Stephen Pia at 702/798-2102 or Patricia Honsa at 702/798-2141.
Stephen Pia
Team Leader
RADQA Program
Enclosure
-------
NOTICE
This material has been funded wholly by
the U.S. Environmental Protection Agency.
It has been subjected to the Agency's review,
and has been approved for publication as
an EPA document.
-------
CRD-LV Performance Evaluation: Gross Alpha-Beta in Water, 19-Jul-1996 1/16
The following pages consist of separate sections for each of the nuclides in this study with four
parts per section. After the first, each part is separated from the next by a new page or a thick
horizontal bar. The first page of each section is a statistical summary for the nuclide and starts
with a statement of the known value, the control limits, and the warning limits.
The warning limits are placed at two normalized standard deviations above and below the
known value and the control limits are three normalized standard deviations above and below
the known value. If you keep control charts, these values will be useful for anticipating problems
with the accuracy of your analytical methods.
The coin shaped pie chart at the top of the summary page shows the fate of all the samples
sent out in number and percentage terms. The pie chart starts at the top and rotates clockwise.
The first sector represents those participants who submitted analytical results within both the
warning and control limits. The next sector represents those who are in the warning region but
not out of control. The third sector represents those who are out of control, but have passed
the outlier test. The fourth sector represents those who have failed the outlier test. The last
sector represents those participants who have failed to respond properly. This is the case if no
analytical results were returned, or less than three determinations were reported, or if the results
were received too late. The reeding on the edge of the coin is spaced at one percent intervals, and
the sector shading becomes darker as the data reliability decreases. Sectors with zero width are
not shown.
The table in the center shows a number of statistical quantities calculated from the submitted
data based on the mean and median values in relation to the known value, both before and after
outlier removal. The lower pie chart uses the same construction as the upper chart and shows
the distribution of properly submitted data in terms of deviation from the known value divided
into sectors representing one, two, three, and greater than three normalized standard deviations.
The second part is an alphabetical listing, in lab-code order, of submitted data and several
calculated quantities. An entry that is shaded has been rejected because of one of the reasons
listed above or failure of the outlier test. The fifth and sixth columns are a measure of laboratory
precision. The Range analysis is a normalized value that you may use to keep precision control
charts. The eighth and ninth columns are the differences from the mean of all non-outliers and
from the known value, respectively. If this value is between 2.0 and 3.0, your analytical process
precision is in the warning zone; if it exceeds 3.0 it is out of control. A tag symbol may appear in
the last column. Each page with tags has a symbol definition summary at the bottom. If there is
no tag symbol, the data is within the control limits, but it may be in the warning zone.
The third part is a three-column listing of result average, tag symbol, and lab-code in average
order excluding those labs not responding properly. In this order, all outliers and out-of-control
results appear at the top or bottom of the list.
The last part is two bar chart displays showing frequency distributions of responding
participants. The first chart places the known value at the center and a bar at each 0.2 unit of
expected precision. The second chart places the mean of the reported measurements at the center
and a bar at each 0.2 unit of standard deviation. In both cases, a bar includes those results within
0.1 unit up to the maximum of six. Any results more than six units from the center value are
shown cumulatively by a shaded bar one past the sixth unit. If the central tendency of the known
value distribution falls away from the center, an error in accuracy is indicated. If the distribution
is broad, poor precision is indicated. The mean value distribution is similar but uses the average
and standard deviation of reported results as its basis.
-------
?	
2/16
CRD-LV Performance Evaluation: Gross Alpha-Beta in Water, 19-Jul-1996
The Range Analysis(R + SR) is calculated from the range, mean range and standard error of
the range values. The range is the difference between the maximum and minimum results for the
laboratory. The mean range is calculated by multiplying the expected precision by 1.693(for three
results). The standard error of the range is calculated by multiplying the mean range by 2.575(for
three results), subtracting the mean range from this product, and dividing the result by 3. If the
range is greater than the mean range, then the range analysis is calculated by subtracting the
mean range from the range, dividing the result by the standard error of the range and adding 1.
If the mean range is greater than or equal to the range, then the range analysis is calculated by
dividing the range by the mean range.
The normalized deviation of the mean from the grand average is calculated from the deviation
of the mean from the grand average and the standard error of the mean values. The deviation of
the mean from the grand average is calculated by subtracting the grand average from the
average of the laboratory's three results. The standard error of the mean is calculated by
dividing the expected precision by the square root of 3(the number of results). The normalized
deviation of the mean from the grand average is calculated by dividing the deviation of the mean
from the grand average by the standard error of the mean.
The normalized deviation of the mean from the known value is calculated from the deviation of
the mean from the known value and the standard error of the mean values. The deviation of the
mean from the known value is calculated by subtracting the known value from the average of the
laboratory's three results. The standard error of the mean is calculated by dividing the expected
precision by the square root of 3(the number of results). The normalized deviation of the mean
from the known value is calculated by dividing the deviation of the mean from the known value by
the standard error of the mean.
A complete explanation of the statistical calculations involved in the report may be found in
the Environmental Radioactivity Performance Evaluation Studies Program information brochure
[Draft Revision of EPA-600/4-81-004], available from Patricia Honsa, CRD-LV, 702/798-2141.
-------
CRD-LV Performance Evaluation: Gross Alpha-Beta in Water, 19-Jul-1996 3/16
Gross Alpha	Statistical Summary	184 Participants
The known value of this nuclide is 24.4 pCi/1 with an expected precision of 6.1; the control limits
are 13.8 to 35.0; the warning regions are 13.8 to 17.3 and 31.5 to 35.0
24(13.0 %) Failed to respond
. 109(59.2 %) Within all limits

: \}



4(2.2 %) Outliers •' • \K.
* • * * ^

15(8.2 %) Out of control'

-•32(17.4 %) In warning zone
but not an outlier ^^Cr~r~"T—
l
but within control
Statistic
Respondents
Non-outliers
Mean
20.16
Grand Avg 19.67
Std. Dev.
5.56
4.68
Variance
30.87
21.93
% Coef. of Var.
27.56
23.81
% deviation of mean from known value
-17.39
-19.40
Norm. dev. of mean from known value
-0.76
-1.01
Median
19.40
19.15
% deviation of median from known value
-20.49
-21.52
Norm. dev. of median from known value
-0.90
-1.12
20(12.5 %) More than 3 norm. S.D. •,
31(19.4 %) Between 2 and 3 norm. S.D.*
, 45(28.1 %) Within 1 norm. S.D.
of known value
64(40.0 %) Between 1 and 2 norm. S.D.
-------
ft	









4 / 16 CRD-LV Performance Evaluation: Gross Alpha-Beta in Water, 19-Jul-1996

Gross Alpha








Lab
Res. 1
Res. 2

Exper.
Rng anal

Normalized deviation

Res. 3
Sigma
(R + SR)
Average
(grand-avg)
(known) Tag
A
22.8
25.6
24.4
1.40
0.271
24.27
1.31
-0.04

AE
20.1
20.0
18.6
0.84
0.145
19.57
-0.03
-1.37

AF
17.8
17.9
20.3
1.42
0.242
18.67
-0.28
-1.63

AH
16.6
12.6
14.5
2.00
0.387
14.57
-1.45
-2.79

AJ
44.6
31.6
44^0
7.31
1.475
40.03
5;78
;4.44
X
AK
24.4
23.7
24.6
0.47
0.087
24.23
1.30
-0.05

AL
21.2
23.1
23.3
1.16
0.203
22.53
0.81
-0.53

AP
22.2
21.9
19.2
1.65
0.290
21.10
0.41
-0.94

AR
11.9
11.3
11.1
0.42
0.077
11.43
-2.34
-3.68
il
AU
14.4
11.4
14.7
1.82
0.320
13.50
-1.75
-3.09

AW
21.7
24.2
24.1
1.42
0.242
23.33
1.04
-0.30

AZ








*
BA
18.1
20.8
22.8
2.36
0.455
20.57
0.26
-1.09

BB
18.0
15.0
18.2
1.79
0.310
17.07
-0.74
-2.08

BC
20.1
19.0
21.2
1.10
0.213
20.10
0.12
-1.22

BG
12.5
16.7
12.6
2.40
0.407
13.93
-1.63
-2.97

BH
18.6
23.8
19.1
2.87
0.504
20.50
0.24
-1.11

BK
24.8
26.5
25.4
0.86
0.165
25.57
1.68
0.33

BL
46.5
38.5
40.5
4.16
0.775
4L83
6.29
4.95
X
BM
20.6
20.5
20.4
0.10
0.019
20.50
0.24
-1.11

BN
21.0
20.7
19.0
1.08
0.194
20.23
0.16
-1.18

BO
17.5
13.2
12.4
2.74
0.494
14.37
-1.50
-2.85

BS
23.0
26.0
25.0
1.53
0.290
24.67
1.42
0.08

C
22.7
21.6
20.8
0.95
0.184
21.70
0.58
-0.77

CA
21.2
17.8
21.2
1.96
0.329
20.07
0.11
-1.23

CE
22.7
21.9
19.5
1.67
0.310
21.37
0.48
-0.86

CG
19.4
16.5
21.1
2.33
0.445
19.00
-0.19
-1.53

CJ
23.0
22.0
23.0
0.58
0.097
22.67
0.85
-0.49

CO
17.8
19.1
16.9
1.11
0.213
17.93
-0.49
-1.84

CS
16.7
21.9
16.1
3.19
0.562
18.23
-0.41
-1.75

CX
18.6
17.7
18.4
0.47
0.087
18.23
-0.41
-1.75

D
24.3
25.7
22.1
1.81
0.349
24.03
1.24
-0.10

DB
19.0
18.8
20.8
1.10
0.194
19.53
-0.04
-1.38

DD
16.9
20.4
19.1
1.77
0.339
18.80
-0.25
-1.59

DE
25.8
25.8
25.9
0.06
0.010
25.83
1.75
0.41

DH
20.8
18.9
17.8
1.52
0.290
19.17
-0.14
-1.49

DO
24.7
27.0
22.8
2.10
0.407
24.83
1.47
0.12

DR
15.0
14.0
11.0
2.08
0.387
13.33
-1.80
-3.14
u
DS
18.3
20.6
12.2
4.34
0.813
17.03
-0.75
-2.09

DT
26.4
24.8
25.0
0.87
0.155
25.40
1.63
0.28

DZ
28.7
30.9
28.5
1.33
0.232
29.37
2.75
1.41

E
21.9
22.0
22.8
0.49
0.087
22.23
0.73
-0.62

EB
21.1
18.4
19.0
1.42
0.261
19.50
-0.05
-1.39

EL
10.9
10.0
11.5
0.75
0.145
10.80
-2.52
-3.86

EO
20.0
21.0
16.0
2.65
0.484
19.00
-0.19
-1.53

• =
No data submitted

TAG SYMBOLS

11 = Above control limit
[0S
Insufficient data
x =
Determined to be an outlier
= Below control limit
			—V
-------
CRD-:
•LV Performance Evaluation: Gross Alpha'
-Beta in Water, 19- Jul-1996
5/16
Gross Alpha
Lab Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known) Tag
ER
19.0
19.2
19.0
0.12
0.019
19.07
-0.17
-1.51
EV
12.5
15.6
16.5
2.10
0.387
14.87
-1.36
-2.71
EW;








EX
25.2
25.2
20.0
3.00
0.504
23.47
1.08
-0.27
PF,"
37,2
41,3
36.5
2:59
0.465
38;33
5:30
3*96 x
FJ








FL
10.0
13.0
10.0
1.73
0.290
11.00
-2.46
-3.80 J
FN
18.0
19.0
22.0
2.08
0.387
19.67
0.00
-1.34
FZ
20.2
20.6
19.7
0.45
0.087
20.17
0.14
-1.20
GQ
20.8
22.1
21.8
0.68
0.126
21.57
0.54
-0.80
GT
30.9
26.1
27.6
2.46
0.465
28.20
2.42
1.08
GZ
19.7
18.0
18.2
0.93
0.165
18.63
-0.29
-1.64
HI
14.7
15.6
12.8
1.43
0.271
14.37
-1.50
-2.85
HK
21.1
21.3
21.2
0.10
0.019
21.20
0.44
-0!91
HL
19.4
20.6
20.5
0.67
0.116
20.17
0.14
-1.20
HP
18.5
18.6
17.8
0.44
0.077
18.30
-0.39
-1.73
I
35.3
32.8
32.8
1.44
0.242
33.63
3.97
2.62
ED
12.8
11.1
15.8
2.38
0.455
13.23
-1.83
-3.17 U
J
24.2
23.7
25.3
0.82
0.155
24.40
1.34
0.00
JG
24.1
22.7
21.5
1.30
0.252
22.77
0.88
-0.46
JM
14.5
19.7
17.4
2.61
0.504
17.20
-0.70
-2.04
JN
15.4
16.4
15.9
0.50
0.097
15.90
-1.07
-2.41
JP
17.6
16.7
15.8
0.90
0.174
16.70
-0.84
-2.19
JQ
19.2
20.3
19.7
0.55
0.107
19.73
0.02
-1.33
JS
13.0
11.9
12.8
0.59
0.107
12.57
-2.02
-3.36 U
JY
18.7
15.5
18.4
1.77
0.310
17.53
-0.61
-1.95
K
36.0
31.6
26.4
4.81
0.930
31.33
3.31
1.97
KE
16.5
14.6
23.3
4.57
0.842
18.13
-0.44
-1.78
KH
17.8
17.3
17.9
0.32
0.058
17.67
-0.57
-1.91
KT
22.0
23.0
24.0
1.00
0.194
23.00
0.95
-0.40
KX







•
L
16.4
19.6
17.8
1.60
0.310
17.93
-0.49
-1.84
le







•
LF
24.0
24.0
23.0
0.58
0.097
23.67
1.14
-0.21
LL
19.7
23.0
26.0
3.15
0.610
22.90
0.92
-0.43
LR
16.0
15.0
16.0
0.58
0.097
15.67
-1.14
-2.48
LT
14.6
15.9
14.7
0.72
0.126
15.07
-1.31
-2.65
M
26.0
26.0
40.0
8.08
1.677
30.67
3.12
1.78
MF
19.1
18.4
19.9
0.75
0.145
19.13
-0.15
-1.50
MV
14.3
14.4
14.0
0.21
0.039
14.23
-1.54
-2.89
MX
14.1
11.6
15.0
1.76
0.329
13.57
-1.73
-3.08
N
24.0
22.3
23.2
0.85
0.165
23.17
0.99
-0.35
NA
30.0
27.0
28.0
1.53
0.290
28.33
2.46
1.12
NB
11.0
12.0
14.0
1.53
0.290
12.33
-2.08
-3.43 U
NJ
17.5
18.8
18.3
0.66
0.126
18.20
-0.42
-1.76
• =
0 =
No data submitted
Insufficient data
x =
TAG SYMBOLS
Determined to be an outlier
ft s Above control limit
JJ- = Below control limit
-------
6/16 CRD-LV Performance Evaluation: Gross Alpha-Beta in Water, 19-Jul-1996
r
Gross Alpha
Lab Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known) Tag
NK
19.3
16.5
16.0
1.78
0.320
17.27
-0.68
-2.03
NO
18.0
19.0
20.0
1.00
0.194
19.00
-0.19
-1.53
NP
15.3
17.2
13.5
1.85
0.358
15.33
-1.23
-2.57
NT
26.1
25.3
25.1
0.53
0.097
25.50
1.66
0.31
O
22.8
21.9
21.2
0.80
0.155
21.97
0.65
-0.69
OA
13.8
11.4
13.8
1.39
0.232
13.00
-1.89
-3.24 U
OB
16.2
17.0
18.3
1.06
0.203
17.17
-0.71
-2.05
OF
19.5
18.6
19.1
0.45
0.087
19.07
-0.17
-1.51
OS
18.0
21.0
22.0
2.08
0.387
20.33
0.19
-1.15
OT








OX







•
OY







•
P
26.6
25.6
22.3
2.25
0.416
24.83
1.47
0.12
PA
11.4
10.2
17.2
3.74
0.678
12.93
-1.91
-3.26 U
PB
21.1
22.4
21.4
0.68
0.126
21.63
0.56
-0.79
PG
23.2
23.4
22.2
0.64
0.116
22.93
0.93
-0.42
PM
20.7
19.2
19.6
0.78
0.145
19.83
0.05
-1.30
PQ
14.2
17.4
15.4
1.62
0.310
15.67
-1.14
-2.48
PR
40.6
35.6
34.2
3.31
0.610
36.77
4.86
3.51 *
PV
18.5
18.6
19.4
0.49
0.087
18.83
-0.24
1.58
Q
21.6
22.2
23.4
0.92
0.174
22.40
0.78
-0.57
QC







•
QM
15.6
20.0
16.9
2.26
0.426
17.50
-0.62
-1.96
QP
19.6
16.3
18.7
1.71
0.320
18.20
-0.42
-1.76
QQ
23.2
17.8
17.6
3.18
0.542
19.53
-0.04
-1.38
QT
18.9
20.1
21.9
1.51
0.290
20.30
0.18
-1.16
QU
17.2
17.2
17.5
0.17
0.029
17.30
-0.67
-2.02
QW
14.0
18.7
19.8
3.08
0.562
17.50
-0.62
-1.96
ox
22.1
21.8
21.8
0.17
0.029
21.90
0.63
-0.71
QZ
17.2
17.4
18.8
0.87
0.155
17.80
-0.53
-1.87
R
16.8
18.9
15.8
1.58
0.300
17.17
-0.71
-2.05
RB
29.6
29.6
27.1
1.44
0.242
28.77
2.58
1.24
RD
17.6
18.4
19.1
0.75
0.145
18.37
-0.37
-1.71
RF
17.6
12.2
11.7
3.27
0.571
13.83
-1.66
-3.00
RG
18.3
17.5
15.2
1.61
0.300
17.00
-0.76
-2.10
RI
20.8
20.3
20.0
0.40
0.077
20.37
0.20
-1.15
RK
28.6
27.0
23.0
2.88
0.542
26.20
1.86
0.51
RR
27.0
26.0
27.0
0.58
0.097
26.67
1.99
0.64
RZ
19.7
20.1
20.2
0.26
0.048
20.00
0.09
-1.25
S
22.0
24.5
25.4
1.76
0.329
23.97
1.22
-0.12
sc







•
SD
23.2
20.5
21.8
1.35
0.261
21.83
0.62
-0.73
SF
16.0
13.7
15.1
1.16
0.223
14.93
-1.34
-2.69
SG
10.1
8.1
12.7
2.31
0.445
10.30
-2.66
-4.00 U
SI
18.5
20.7
18.7
1.22
0.213
19.30
-0.10
-1.45
• =
No data submitted

TAG SYMBOLS

It s Above control limit
l0 = In8ufficipnt data	x = Determined to be an outlier	U = Below control limit
V*"	-//
-------
CRD-LV Performance Evaluation: Gross Alpha-Beta in Water, 19-Jul-1996 7/16 >
Gross Alpha
Lab Res. 1
Res. 2
Res. 3 .
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known)
SL
20.0
21.0
24.0
2.08
0.387
21.67
0.57
-0.78
SM
20.6
19.2
21.4
1.11
0.213
20.40
0.21
-1.14
SN
12.2
13.4
17.0
2.50
0.465
14.20
-1.55
-2.90
SO








SR
23.3
23.1
24.6
0.81
0.145
23.67
1.14
-0.21
ss
18.6
18.5
18.4
0.10
0.019
18.50
-0.33
-1.68
su
15.2
13.9
17.1
1.61
0.310
15.40
-1.21
-2.56
sv
27.0
28.3
31.3
2.21
0.416
28.87
2.61
1.27
sx
18.2
18.8
15.6
1.70
0.310
17.53
-0.61
-1.95
sz
10.2
12.5
10.9
1.18
0.223
11.20
-2.40
-3.75
T
20.3
17.1
16.9
1.91
0.329
18.10
-0.44
-1.79
TD
23.3
23.3
26.7
1.96
0.329
24.43
1.35
0.01
TG
20.3
18.1
17.7
1.40
0.252
18.70
-0.27
-1.62
TB








TL








TN
18.0
15.7
19.5
1.91
0.368
17.73
-0.55
-1.89
TO








TQ
15.7
13.8
15.1
0.97
0.184
14.87
-1.36
-2.71
TW
14.7
15.1
19.1
2.43
0.426
16.30
-0.96
-2.30
TY
16.1
17.0
15.6
0.71
0.136
16.23
-0.97
-2.32
U
24.3
23.7
23.2
0.55
0.107
23.73
1.15
-0.19
UA
26.3
27.4
22.8
2.40
0.445
25.50
1.66
0.31
UE








UN








UP
15.0
14.5
15.1
0.32
0.058
14.87
-1.36
-2.71
UQ
20.1
20.6
21.6
0.76
0.145
20.77
0.31
-1.03
VA
14.7
12.1
12.8
1.35
0.252
13.20
-1.84
-3.18
VC








VH
25.2
32.4
25.8
4.00
0.697
27.80
2.31
0.97
VI
16.5
15.1
14.3
1.11
0.213
15.30
-1.24
-2.58
VJ
28.2
29.8
18.9
5.89
1.106
25.63
1.69
0.35
VO
19.2
17.0
19.9
1.51
0.281
18.70
-0.27
-1.62
VT








W
15.1
18.2
21.8
3.35
0.649
18.37
-0.37
-1.71
WE
23.4
21.1
24.8
1.87
0.358
23.10
0.97
-0.37
WF








WH
17.8
18.8
17.0
0.90
0.174
17.87
-0.51
-1.86
WJ
19.1
16.5
20.0
1.82
0.339
18.53
-0.32
-1.67
WN
36.6
31.7
33.8
2.46
0.474
34.03
4.08
2.74
WO
19.9
21.7
20.9
0.90
0.174
20.83
0.33
-1.01
WP








WR
19.9
20.6
25.1
2.82
0.504
21.87
0.62
-0.72
WS








WU
16.0
14.6
13.4
1.30
0.252
14.67
-1.42
-2.76
WV








• = No data submitted TAG SYMBOLS IT = Above control limit
0 s Insufficient data	x = Determined to be an outlier	II = Below control limit
-------
8/16 CRD-LV Performance Evaluation: Gross Alpha-Beta in Water, 19-Jul-1996
Gross Alpha
Lab Res. 1
Exper. Rng anal	Normalized deviation
Res. 2 Res. 3 Sigma (R + SR) Average (grand-avg) (known) Tag
WW 7.6	8.4
wx
WY
X	23.9 21.4
6.3
25.1
1.06
1.89
0.203
0.358
7.43
23.47
-3.47
1.08
-4.82 U
-0.27
Data sorted by Laboratory Average
Average
Tag
Lab
Average
Tag
Lab
Average
Tag
Lab
7.43
Si
WW
17.03

DS
19.07

ER
10.30
II
SG
17.07

BB
19.13

MF
10.80
U
EL
17.17

R
19.17

DH
11.00
U
FL
17.17

OB
19.30

SI
11.20
u
SZ
17.20

JM
19.50

EB
11.43
11
AR
17.27

NK
19.53

DB
12.33
11
NB
17.30

QU
19.53

QQ
12.57
u
JS
17.50

QW
19.57

AE
12.93
u
PA
17.50

QM
19.67

FN
13.00
u
OA
17.53

sx
19.73

JQ
13.20
11
VA
17.53

JY
19.83

PM
13.23
11
ID
17.67

KH
20.00

RZ
13.33
u
DR
17.73

TN
20.07

CA
13.50
u
AU
17.80

QZ
20.10

BG
13.57
11
MX
17.87

WH
20.17

HL
13.83

RF
17.93

L
20.17

FZ
13.93

BG
17.93

CO
20.23

BN
14.20

SN
18.10

T
20.30

QT
14.23

MV
18.13

KE
20.33

OS
14.37

BO
18.20

NJ
20.37

RI
14.37

HI
18.20

QP
20.40

SM
14.57

AH
18.23

CX
20.50

BM
14.67

WU
18.23

cs
20.50

BH
14.87

UP
18.30

HP
20.57

BA
14.87

TQ
18.37

W
20.77

UQ
14.87

EV
18.37

RD
20.83

WO
14.93

SF
18.50

ss
21.10

AP
15.07

LT
18.53

WJ
21.20

HK
15.30

VI
18.63

GZ
21.37

CE
15.33

NP
18.67

AF
21.57

GQ
15.40

SU
18.70

VO
21.63

PB
15.67

PQ
18.70

TG
21.67

SL
15.67

LR
18.80

DD
21.70

C
15.90

JN
18.83

PV
21.83

SD
16.23

TY
19.00

NO
21.87

WR
16.30

TW
19.00

EO
21.90

QX
16.70

JP
19.00

CG
21.97

O
17.00

RG
19.07

OF
22.23

E
• = No data submitted
0 = Insufficient data
TAG SYMBOLS
x = Determined to be an outlier
IT = Above control limit
11 = Below control limit
-------
CRD-LV Performance Evaluation: Gross Alpha-Beta in Water, 19-Jul-1996 9/16
Gross Alpha
Data sorted by Laboratory Average
Average Tag
Lab
Average
Tag
Lab
Average
Tag
Lab
22.40
Q
23.97

S
26.20

RK
22.53
AL
24.03

D
26.67

RR
22.67
CJ
24.23

AK
27.80

VH
22.77
JG
24.27

A
28.20

GT
22.90
LL
24.40

J
28.33

NA
22.93
PG
24.43

TD
28.77

RB
23.00
KT
24.67

BS
28.87

SV
23.10
WE
24.83

P
29.37

DZ
23.17
N
24.83

DO
30.67

M
23.33
AW
25.40

DT
31.33

K
23.47
X
25.50

UA
33.63

I
23.47
EX
25.50

NT
34.03

WN
23.67
SR
25.57

BK
36.77
X
PR
23.67
LF
25.63

VJ
38.33
X
FF
23.73
U
25.83

DE
40.03
X
AJ





41.83
X
BL
% responding labs

Frequency distribution




IO-
TP"
-6

f- -T
% responding labs
-4	-2	0	+2	+4
Normalized deviation of the mean from the known value
Frequency distribution
+6
10-
jbJL
T«»'TI

iBw | ¦¦ ^
-6
T
-2	0	+2	+4
Normalized deviation of the mean from the grand average
+6
• = No data submitted	TAG SYMBOLS	ft = Above control limit
0 = Insufficient data .	x & Determined to be an outlier	li ~ Below control limit
-------
CRD-LV Performance Evaluation: Gross Alpha-Beta in Water, 19-Jul-1996 10 / 16
Gross Beta	Statistical Summary	184 Participants
The known value of this nuclide is 44.8 pCi/1 with an expected precision of 5.0; the control limits
are 36.1 to 53.5; the warning regions are 36.1 to 39.0 and 50.6 to 53.5
24(13.0 %) Failed to respond •«
. 112(60.9 %) Within all limits
7(3.8 %) Outliers '' / '
	
* ~ ^ S

18(9.8 %) Out of control'

23(12.5 %) In warning zone
but not an outlier
I
i i
but within control
Statistic
Respondents
Non-outliers
Mean
44.48
Grand Avg 44.38
Std. Dev.
9.50
5.65
Variance
90.22
31.93
% Coef. of Var.
21.36
12.73
% deviation of mean from known value
-0.72
-0.94
Norm. dev. of mean from known value
-0.03
-0.07
Median
44.82
44.87
% deviation of median from known value
0.04
0.15
Norm. dev. of median from known value
0.00
0.01
25(15.6 %) More than 3 norm. S.D
23(14.4 %) Between 2 and 3 norm. S.D. •
; 61 (38.1 %) Within 1 norm. S.D.
!	of Known value
*51(31.9 %) Between 1 and 2 norm. S.D.
-------
(¦
11/16 CRD-LV Performance Evaluation: Gross Alpha-Beta in Water, 19-Jul-1996
	^
r
Gross Beta








Lab
Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known) Tag
A
41.0
43.5
42.8
1.29
0.295
42.43
-0.67
-0.82

AE
30.9
40.0
37.4
4.69
1.143
36.10
-2.87
-3.01

AF
44.6
44.9
39.4
3.09
0.650
42.97
-0.49
-0.64

AH
50.5
44.9
49.0
2.90
0.662
48.13
1.30
1.15

AJ
50.9
49.2
40.8
5.41
1.368
46.97
0.90
0.75

AK
44.0
44.4
45.0
0.50
0.118
44.47
0.03
-0.12

AL
43.3
42.0
42.0
0.75
0.154
42.43
-0.67
-0.82

AP
46.0
44.8
45.7
0.62
0.142
45.50
0.39
0.24

AR
37.9
37.8
36.8
0.61
0.130
37.50
-2.38
-2.53

AU
37.4
45.3
45.2
4.53
0.933
42.63
-0.60
-0.75

AW
55.2
50.6
51.1
2.52
0.543
52.30
2.74
2.60

AZ








•
BA
50.1
44.9
52.8
4.02
0.933
49.27
1.69
1.55

BB
59.7
40.5
53.2
9.77
3.416
51.13
2.34
2.19

BC
36.1
38.0
33.8
2.10
0.496
35.97
-2.91
-3.06
U
BG
49.6
52.1
51.5
1.31
0.295
51.07
2.32
2.17

BH
41.3
45.3
40.9
2.43
0.520
42.50
-0.65
-0.80

BK
54.3
50.1
53.5
2.23
0.496
52.63
2.86
2.71

BL
45.1
50.9
51.6
3.57
0.768
49.20
1.67
1.52

BM
44.5
44.5
46.1
0.92
0.189
45.03
0.23
0.08

BN
36.0
39.4
41.1
2.60
0.602
38.83
-1.92
-2.07

BO
43.8
43.9
42.6
0.72
0.154
43.43
-0.33
-0.47

BS
48.0
51.0
50.0
1.53
0.354
49.67
1.83
1.69

C
41.9
41.9
42.0
0.06
0.012
41.93
-0.85
-0.99

CA
43.5
40.5
37.1
3.20
0.756
40.37
-1.39
-1.54

CE
42.8
44.6
44.7
1.07
0.224
44.03
-0.12
-0.27

CG
46.9
44.1
42.5
2.23
0.520
44.50
0.04
-0.10

CJ
47.0
43.0
46.0
2.08
0.473
45.33
0.33
0.18

CO
32.9
39.8
32.9
3.98
0.815
35.20
-3.18
-3.33

CS
38.8
43.6
40.8
2.41
0.567
41.07
-1.15
-1.29

CX
39.2
39.4
38.6
0.42
0.095
39.07
-1.84
-1.99

D
50.7
52.0
51.8
0.70
0.154
51.50
2.47
2.32

DB
46.6
47.7
52.0
2.85
0.638
48.77
1.52
1.37

DD
46.2
46.6
41.0
3.12
0.662
44.60
0.08
-0.07

DE
44.2
44.2
44.6
0.23
0.047
44.33
-0.02
-0.16

DH
48.1
45.8
45.2
1.53
0.343
46.37
0.69
0.54

DO
46.0
45.0
48.0
1.53
0.354
46.33
0.68
0.53

DR
46.5
50.7
48.7
2.10
0.496
48.63
1.47
1.33

DS
42.5
37.5
38.1
2.73
0.591
39.37
-1.74
-1.88

DT
46.5
44.5
44.3
1.22
0.260
45.10
0.25
0.10

DZ
46.5
43.7
43.7
1.62
0.331
44.63
0.09
-0.06

E
48.3
48.3
50.3
1.15
0.236
48.97
1.59
1.44

EB
46.0
44.4
43.2
1.40
0.331
44.53
0.05
-0.09

EL
40.4
39.7
41.5
0.91
0.213
40.53
-1.33
-1.48

EO
51.0
46.0
50.0
2.65
0.591
49.00
1.60
1.45

• =
No data submitted

TAG SYMBOLS

ff ee Above control limit

Insufficient data
x =
Determined to be an outlier
U = Below control limit
-------
r
CRD-LV Performance Evaluation: Gross Alpha-Beta in Water, 19-Jul-1996 12 / 16
Gross Beta
Lab Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known) Tag
ER








•
EV
41.3
49.8
46.5
4.29
1.008
45.87
0.52
0.37

EW
43.1
45.2
46.0
1.50
0.343
44.77
0.13
-0.01

EX
41.9
39.7
39.5
1.33
0.284
40.37
-1.39
-1.54

FF
93;1
91.1
96.2
2.57
0.602
93.47
17.00
16;86
X
FJ








, '•
FL
38.0
39.0
30.0
4.93
1.120
35.67
-3.02
-3.16
u
FN
46.0
47.0
49.0
1.53
0.354
47.33
1.02
0.88

FZ
35.9
30.1
28.0
4.09
0.933
31.33
-4.52
-4.66
u
GQ
49.4
49.5
44.3
2.97
0.614
47.73
1.16
1.02

GT
48.8
53.0
50.5
2.11
0.496
50.77
2.21
2.07

GZ
43.3
36.6
38.6
3.44
0.791
39.50
-1.69
-1.84

HI
58.0
40.2
48.3
8.91
3.101
48.83
1.54
1.40

HK
51.5
50.8
51.2
0.35
0.083
51.17
2.35
2.21

HL
45.5
46.3
46.3
0.46
0.095
46.03
0.57
0.43

HP
47.5
49.9
53.1
2.81
0.662
50.17
2.00
1.86

I
40.1
41.3
40.2
0.67
0.142
40.53
-1.33
-1.48

ID
41.2
40.2
42.1
0.95
0.224
41.17
-1.11
-1.26

J
45.5
41.9
45.8
2.17
0.461
44.40
0.01
-0.14

JG
52.5
47.2
46.0
3.46
0.768
48.57
1.45
1.30

JM
40.4
37.2
38.6
1.60
0.378
38.73
-1.96
-2.10

JN
37.1
39.7
38.9
1.33
0.307
38.57
-2.01
-2.16

JP
48.8
45.7
48.5
1.71
0.366
47.67
1.14
0.99

JQ
11.0
9.9
9.2
0.91
0.213
10.03
;11;90
-12.04
X
JS
39.9
38.1
39.2
0.91
0.213
39.07
-1.84
-L99

JY
41.4
40.9
43.9
1.61
0.354
42.07
-0.80
-0.95

K
38.2
39.2
38.3
0.55
0.118
38.57
-2.01
-2.16

KE
33.4
31.3
41.2
5.22
1.323
35.30
-3.15
-3.29

KH
41.4
39.8
43.5
1.86
0.437
41.57
-0.97
-1.12

KT
46.0
48.0
52.0
3.06
0.709
48.67
1.49
1.34

EX








•
L
48.2
50.7
47.8
1.57
0.343
48.90
1.57
1.42

LE








.#
LF
45.0
48.0
51.0
3.00
0.709
48.00
1.25
1.11

LL
32.1
32.0
36.4
2.51
0.520
33.50
-3.77
-3.91

LR
60.0
58.0
59.0
1.00
0.236
59.00
5.06
4.92
tr
LT
48.2
48.6
47.6
0.50
0.118
48.13
1.30
1.15

M
43.0
39.0
40.0
2.08
0.473
40.67
-1.29
-1.43

MF
51.7
52.9
49.7
1.62
0.378
51.43
2.44
2.30

MV
41.3
41.8
42.7
0.71
0.165
41.93
-0.85
-0.99

MX
42.3
37.3
34.7
3.86
0.898
38.10
-2.18
-2.32

N
45.5
48.8
47.2
1.65
0.390
47.17
0.97
0.82

NA
95:0
96;0
97.0
1.15
0.236
9667
17.77
17:62
X:
NB
16:0
17:0
20.0
2:52
0.591
17.33
.-9:37
-9.61
*
NJ
42.7
43.0
42.7
0.17
0.035
42.80
-0.55
-CK69

• =
No data submitted

TAG SYMBOLS

1T = Above control limit
L 0 = Insufficient data	x = Determined to be an outlier	II = Below control limit
-------
13 / 16 CRD-LV Performance Evaluation: Gross Alpha-Beta in Water, 19-Jul-1996
	
Gross Beta








Lab
Res. 1
Res. 2

Exper.
Rng anal

Normalized deviation

Res. 3
Sigma
(R + SR)
Average
(grand-avg)
(known) Tag
NK
40.4
37.2
38.0
1.67
0.378
38.53
-2.03
-2.17

NO
51.0
52.0
53.0
1.00
0.236
52.00
2.64
2.49

NP
75.1
74.7
78.3
1.97
0.425
76.03
10197
10.82

NT
40.6
42.1
43.5
1.45
0.343
42.07
-0.80
-0.95

O
45.0
49.0
46.6
2.01
0.473
46.87
0.86
0.72

OA
61.0
52.0
63.0
5.86
1.570
58.67
4.95
4.80
ft
OB
50.0
48.0
46.0
2.00
0.473
48.00
1.25
1.11

OF
41.0
39.0
38.9
1.18
0.248
39.63
-1.64
-1.79

OS
52.0
46.0
50.0
3.06
0.709
49.33
1.72
1.57

OT
43.3
45.7
49.8
3.29
0.768
46.27
0.65
0.51

OX









OY








*
P
46.8
44.0
47.5
1.85
0.413
46.10
0.60
0.45

PA
54.3
53.9
55.6
0.89
0.201
54.60
3.54
3.39
It
PB
41.9
42.3
42.4
0.26
0.059
42.20
-0.75
-0.90

PG
47.5
47.1
48.5
0.72
0.165
47.70
1.15
1.00

PM
47.4
50.6
46.4
2.19
0.496
48.13
1.30
1.15

PQ
41.7
40.2
43.8
1.81
0.425
41.90
-0.86
-1.00

PR
43.7
46.0
40.1
2.97
0.697
43.27
-0.39
-0.53

PV
43.3
49.0
46.8
2.87
0.673
46.37
0.69
0.54

Q
48.6
49.5
50.4
0.90
0.213
49.50
1.77
1.63

QC








•
QM
49.0
52.9
48.4
2.44
0.532
50.10
1.98
1.84

QP
33.8
43.8
42.9
5.53
1.345
40.17
-1.46
-1.61

QQ
41.8
39.5
46.2
3.40
0.791
42.50
-0.65
-0.80

QT
46.3
45.5
43.4
1.50
0.343
45.07
0.24
0.09

QU
42.5
42.0
41.5
0.50
0.118
42.00
-0.82
-0.97

QW
43.8
44.0
42.7
0.70
0.154
43.50
-0.30
-0.45

ox
53.8
53.3
52.6
0.60
0.142
53.23
3.07
2.92

Qz
40.2
40.0
39.3
0.47
0.106
39.83
-1.57
-1.72

R
36.3
47.7
42.4
5.70
1.660
42.13
-0.78
-0.92

RB
44.0
44.0
43.0
0.58
0.118
43.67
-0.25
-0.39

RD
50.9
50.5
48.0
1.57
0.343
49.80
1.88
1.73

RF
50.5
46.9
44.7
2.93
0.685
47.37
1.03
0.89

RG
47.5
48.8
49.4
0.97
0.224
48.57
1.45
1.30

RI
49.9
53.3
50.1
1.91
0.402
51.10
2.33
2.18

RK
50.7
50.0
50.4
0.35
0.083
50.37
2.07
1.93

RR
56.0
53.0
52.0
2.08
0.473
53.67
3.22
3.07
It
RZ
39.2
38.3
41.3
1.54
0.354
39.60
-1.66
-1.80

S
48.4
51.4
51.6
1.79
0.378
50.47
2.11
1.96

sc








•.
SD
41.9
32.2
42.6
5.81
1.435
38.90
-1.90
-2.04

SF
42.8
36.6
39.1
3.12
0.732
39.50
-1.69
-1.84

SG
35.4
35.2
38.3
1.73
0.366
36.30
-2.80
-2.94

SI
41.5
42.0
43.4
0.98
0.224
42.30
-0.72
-0.87

• =
No data submitted

TAG SYMBOLS

1? = Above control limit
10-
Insufficient data
x =
Determined to be an outlier
li = Below control limit
-------
CRD-LV Performance Evaluation: Gross Alpha-Beta in Water, 19-Jul-1996 14 / 16
Gross Beta
Lab Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known) Tag
SL
40.0
41.0
45.0
2.65
0.591
42.00
-0.82
-0.97

SM
42.3
41.5
47.4
3.20
0.697
43.73
-0.22
-0.37

SN
48.5
39.0
52.0
6.73
2.020
46.50
0.73
0.59

SO









SR
50.5
51.6
47.6
2.07
0.473
49.90
1.91
1.77

SS
45.9
45.3
48.2
1.53
0.343
46.47
0.72
0.58

SU
33.2
31.5
34.2
1.37
0.319
32.97
-3.95
-4.10
r
sv
46.2
50.2
48.9
2.04
0.473
48.43
1.40
1.26

sx
48.0
53.5
45.1
4.27
0.992
48.87
1.55
1.41

sz
39.5
39.0
46.0
3.91
0.827
41.50
-1.00
-1.14

T
42.5
43.1
37.3
3.19
0.685
40.97
-1.18
-1.33

td;
22ll
19.3
23.3
2.16
0.473
21.77
-7,83
-7:98
X
TG
47.7
46.6
43.0
2.46
0.555
45.77
0.48
0.33

TH








• -
TL









TN
48.7
52.1
47.9
2.23
0.496
49.57
1.80
1.65

TO








•'
TQ
40.0
36.0
36.8
2.12
0.473
37.60
-2.35
-2.49

TW
25.3
32.0
30.2
3.47
0.791
29.17
-5.27
-5.42

TY
46.6
46.3
48.6
1.25
0.272
47.17
0.97
0.82

U
45.3
46.1
47.1
0.90
0.213
46.17
0.62
0.47

UA
39.2
37.6
33.6
2.88
0.662
36.80
-2.63
-2.77

UE








m
vs.








m
UP
43.4
46.2
45.0
1.40
0.331
44.87
0.17
0.02

UQ
46.1
44.4
48.3
1.96
0.461
46.27
0.65
0.51

VA
29.8
29.3
29.4
0.26
0.059
29.50
-5.15
-5.30

VC








•
VH
56.1
57.7
53.2
2.28
0.532
55.67
3.91
3.76
n
VI
33.7
33.8
30.9
1.65
0.343
32.80
-4.01
-4.16
u
VJ
45.3
46.3
43.8
1.26
0.295
45.13
0.26
0.12

VO
44.4
39.7
40.8
2.46
0.555
41.63
-0.95
-1.10

VT









W
46.4
45.0
46.1
0.74
0.165
45.83
0.50
0.36

WE
45.2
47.2
50.0
2.41
0.567
47.47
1.07
0.92

WF








«.
WH
30.9
31.0
31.0
0.06
0.012
30.97
-4.65
-4.79

WJ
46.3
50.0
44.1
2.98
0.697
46.80
0.84
0.69

"WN>








»
WO
24.4
31.5
28.5
3.56
0.839
28.13
-5.63
-5.77
i
WE








«
WR
48.0
45.0
47.6
1.63
0.354
46.87
0.86
0.72

WS









WI7
9;6
12.8:
14.5
2:49
0.579
12.30
11:11
1126
X
WV









• =. No data submitted TAG SYMBOLS IT = Above control limit
0 s Insufficient data	x = Determined to be an outlier	II = Below control limit J
-------
15 / 16 CRD-LV Performance Evaluation: Gross Alpha-Beta in Water, 19-Jul-1996
Gross Beta
Exper. Rng anal	Normalized deviation
Lab Res. 1	Res. 2	Res. 3 Sigma (R + SR) Average (grand-avg) (known) Tag
WW 50.8
wx
WY
X	44.4
51.9
42.7
49.9
44.9
1.00
1.15
0.236
0.260
50.87
44.00
2.25
-0.13
2.10
-0.28
Data sorted by Laboratory Average
Average
Tag
Lab
Average
Tag
Lab
Average
Tag
Lab
10.03
X
JQ
40.37

EX
44.53

EB
12.30
X
wu
40.53

I
44.60

DD
17.33
X
NB
40.53

EL
44.63

DZ
21.77
X
TD
40.67

M
44.77

EW
28.13
li
WO
40.97

T
44.87

UP
29.17
u
TW
41.07

CS
45.03

BM
29.50
u
VA
41.17

ID
45.07

QT
30.97
u
WH
41.50

SZ
45.10

DT
31.33
u
FZ
41.57

KH
45.13

VJ
32.80
u
VI
41.63

VO
45.33

CJ
32.97
u
su
41.90

PQ
45.50

AP
33.50
U
LL
41.93

MV
45.77

TG
35.20
U
CO
41.93

C
45.83

W
35.30
4
KE
42.00

SL
45.87

EV
35.67
U
FL
42.00

QU
46.03

HL
35.97
U
BC
42.07

NT
46.10

P
36.10
U
AE
42.07

JY
46.17

U
36.30

SG
42.13

R
46.27

UQ
36.80

UA
42.20

PB
46.27

OT
37.50

AR
42.30

SI
46.33

DO
37.60

TQ
42.43

AL
46.37

PV
38.10

MX
42.43

A
46.37

DH
38.53

NK
42.50

QQ
46.47

SS
38.57

K
42.50

BH
46.50

SN
38.57

JN
42.63

AU
46.80

WJ
38.73

JM
42.80

NJ
46.87

WR
38.83

BN
42.97

AF
46.87

O
38.90

SD
43.27

PR
46.97

AJ
39.07

JS
43.43

BO
47.17

TY
39.07

CX
43.50

QW
47.17

N
39.37

DS
43.67

RB
47.33

FN
39.50

SF
43.73

SM
47.37

RF
39.50

GZ
44.00

X
47.47

WE
39.60

RZ
44.03

CE
47.67

JP
39.63

OF
44.33

DE
47.70

PG
39.83

QZ
44.40

J
47.73

GQ
40.17

QP
44.47

AK
48.00

OB
40.37

CA
44.50

CG
48.00

LF
• s No data submitted
0 = Insufficient data

TAG SYMBOLS
x - Determined to be an outlier
It
= Above control limit
= Below control limit
-------
CRD-LV Performance Evaluation: Gross Alpha-Beta in Water, 19-Jul-1996 16 / 16
Gross Beta
Data sorted by Laboratory Average
Average
Tag
Lab
Average
Tag Lab
Average
Tag
Lab
48.13

LT
49.27
BA
51.13

BB
48.13

PM
49.33
OS
51.17

HK
48.13

AH
49.50
Q
51.43

MF
48.43

SV
49.57
TN
51.50

D
48.57

RG
49.67
BS
52.00

NO
48.57

JG
49.80
RD
52.30

AW
48.63

DR
49.90
SR
52.63

BK
48.67

KT
50.10
QM
53.23

QX
48.77

DB
50.17
HP
53.67
ft
RR
48.83

HI
50.37
RK
54.60
ft
PA
48.87

SX
50.47
S
55.67
ft
VH
48.90

L
50.77
GT
58.67
ft
OA
48.97

E
50.87
WW
59.00
ft
LR
49.00

EO
51.07
BG
76.03
X
NP
49.20

BL
51.10
RI
93.47
X
FF





95.67
X
NA
% responding labs

Frequency distribution

T"
-6
— -¥


% responding labs
-4	-2	0	+2	+4
Normalized deviation of the mean from the known value
Frequency distribution
+6
-*¦
¦y-"-	-"j*
-2	0	+2
-4	-2	0	+2	+4
Normalized deviation of the mean from the grand average
+6
• = .No data submitted
0 = Insufficient data
TAG SYMBOLS
x = Determined to be an outlier
IT s Above control limit
= Below control limit
-------
United States	Office of Research and	EPA/600/R-96/120
Environmental Protection Development	October 1996
Agency	Washington, DC 20460
Tritium in Water
Performance Evaluation
Study
A Statistical Evaluation of
the August 9, 1996 Data
023RS196 COV-120
-------
Tritium in Water
Performance Evaluation Study
August 9, 1996
Environmental Protection Agency
National Exposure Research Laboratory
Characterization Research Division
Las Vegas, Nevada
-------
A
UNITED STATES ENVIRONMENTAL PROTECTION AGENCY
OFFICE OF RESEARCH AND DEVELOPMENT
NATIONAL EXPOSURE RESEARCH LABORATORY
CHARACTERIZATION RESEARCH DIVISION-LAS VEGAS
P.O. BOX 93478
LAS VEGAS, NEVADA 89193-3478
(702/798-2100)
S*
Dear Participant,
Enclosed are the results of the Analytical Sciences Branch (CRD-LV)
Performance Evaluation Study for Tritium In Water; August 9,1996.
The known value for each analysis was determined by gravimetric methods,
checked by chemical analyses performed by CRD-LV's Radiochemistry Laboratory,
and compared to the participating laboratories' grand average.
The expected precision, determined by the known value, was taken from
'Table 3. Laboratory Precision: One Standard Deviation Values and Control Limits
for Various Analyses", which is based on data accumulated over the years by the
Performance Evaluation Program, and can be found in the Environmental Radioactivity
Performance Evaluation Studies Program and Radioactive Standards Distribution
Program information brochure.
Please take a few minutes to review this report and the analytical data your
laboratory submitted to us. If there are any apparent discrepancies, please notify us
immediately.
We encourage you to make use of the computer-automated data-entry system
that has been in place for some time now. As the number of participants increases,
and it becomes unrealistic for us to receive results by mail or FAX, the computer
system will be our only avenue for accepting data.
If you have any questions or comments, please send a message via the data-entry
system or contact Stephen Pia at 702/798-2102 or Patricia Honsa at 702/798-2141.
Sincerely,
Stephen Pia
Team Leader
RADQA Program
Enclosure
-------
NOTICE
This material has been funded wholly by
the U.S. Environmental Protection Agency.
It has been subjected to the Agency's review,
and has been approved for publication as
an EPA document.
-------
CRD-LV Performance Evaluation: Tritium in Water, 9-Aug-1996	1 / 9 !
The following pages consist of separate sections for each of the nuclides in this study with four
parts per section. After the first, each part is separated from the next by a new page or a thick
horizontal bar. The first page of each section is a statistical summary for the nuclide and starts
with a statement of the known value, the control limits, and the warning limits.
The warning limits are placed at two normalized standard deviations above and below the
known value and the control limits are three normalized standard deviations above and below
the known value. If you keep control charts, these values will be useful for anticipating problems
with the accuracy of your analytical methods.
The coin shaped pie chart at the top of the summary page shows the fate of all the samples
sent out in number and percentage terms. The pie chart starts at the top and rotates clockwise.
The first sector represents those participants who submitted analytical results within both the
warning and control limits. The next sector represents those who are in the warning region but
not out of control. The third sector represents those who are out of control, but have passed
the outlier test. The fourth sector represents those who have failed the outlier test. The last
sector represents those participants who have failed to respond properly. This is the case if no
analytical results were returned, or less than three determinations were reported, or if the results
were received too late. The reeding on the edge of the coin is spaced at one percent intervals, and
the sector shading becomes darker as the data reliability decreases. Sectors with zero width are
not shown.
The table in the center shows a number of statistical quantities calculated from the submitted
data based on the mean and median values in relation to the known value, both before and after
outlier removal. The lower pie chart uses the same construction as the upper chart and shows
the distribution of properly submitted data in terms of deviation from the known value divided
into sectors representing one, two, three, and greater than three normalized standard deviations.
The second part is an alphabetical listing, in lab-code order, of submitted data and several
calculated quantities. An entry that is shaded has been rejected because of one of the reasons
listed above or failure of the outlier test. The fifth and sixth columns are a measure of laboratory
precision. The Range analysis is a normalized value that you may use to keep precision control
charts. The eighth and ninth columns are the differences from the mean of all non-outliers and
from the known value, respectively. If this value is between 2.0 and 3.0, your analytical process
precision is in the warning zone; if it exceeds 3.0 it is out of control. A tag symbol may appear in
the last column. Each page with tags has.a symbol definition summary at the bottom. If there is
no tag symbol, the data is within the control limits, but it may be in the warning zone.
The third part is a three-column listing of result average, tag symbol, and lab-code in average
order excluding those labs not responding properly. In this order, all outliers and out-of-control
results appear at the top or bottom of the list.
The last part is two bar chart displays showing frequency distributions of responding
participants. The first chart places the known value at the center and a bar at each 0.2 unit of
expected precision. The second chart places the mean of the reported measurements at the center
and a bar at each 0.2 unit of standard deviation. In both cases, a bar includes those results within
0.1 "nit up to the maximum of six. Any results more than six units from the center value are
shown cumulatively by a shaded bar one past the sixth unit. If the central tendency of the known
value distribution falls away from the center, an error in accuracy is indicated. If the distribution
is broad, poor precision is indicated. The mean value distribution is similar but uses the average
and standard deviation of reported results as its basis.
-------
		 —
2/9	CRD-LV Performance Evaluation: Tritium in Water, 9-Aug-1996
The Range AnaIysis(R + SR) is calculated from the range, mean range and standard error of
the range values. The range is the difference between the maximum and minimum results for the
laboratory. The mean range is calculated by multiplying the expected precision by 1.693(for three
results). The standard error of the range is calculated by multiplying the mean range by 2.575(for
three results), subtracting the mean range from this product, and dividing the result by 3. If the
range is greater than the mean range, then the range analysis is calculated by subtracting the
mean range from the range, dividing the result by the standard error of the range and adding 1.
If the mean range is greater than or equal to the range, then the range analysis is calculated by
dividing the range by the mean range.
The normalized deviation of the mean from the grand average is calculated from the deviation
of the mean from the grand average and the standard error of the mean values. The deviation of
the mean from the grand average is calculated by subtracting the grand average from the
average of the laboratory's three results. The standard error of the mean is calculated by
dividing the expected precision by the square root of 3(the number of results). The normalized
deviation of the mean from the grand average is calculated by dividing the deviation of the mean
from the grand average by the standard error of the mean.
The normalized deviation of the mean from the known value is calculated from the deviation of
the mean from the known value and the standard error of the mean values. The deviation of the
mean from the known value is calculated by subtracting the known value from the average of the
laboratory's three results. The standard error of the mean is calculated by dividing the expected
precision by the square root of 3(the number of results). The normalized deviation of the mean
from the known value is calculated by dividing the deviation of the mean from the known value by
the standard error of the mean.
A complete explanation of the statistical calculations involved in the report may be found in
the Environmental Radioactivity Performance Evaluation Studies Program information brochure
[Draft Revision of EPA-600/4-81-004], available from Patricia Honsa, CRD-LV, 702/798-2141.
-------
CRD-LV Performance Evaluation: Tritium in Water, ft-Aug-1996
3/0
Tritium
Statistical Summary
176 Participants
The known value of this nuclide is 10879 pCi/I with aa expected precision of1086.0; the control limits
are 8991.4 to 12766.6; the warning regions are 8991.4 to 9619.5 and 12138.5 to 12766.6
31 (17.6 %) Failed to respond r
3(1.7 %) Outliers *
4(2.3 %) Out of control'
but not an outlier
Statistic
125(71.0 %) Within all limits
Respondents
13(7.4 %) In warning zono
but within control
Non-outliers
Mean
Std. Dev.
Variance
% Coef. of Var.
% deviation of mean from known value
Norm. dev. of meas from known value
Median
% deviation of median from known value
Norm. dev. of median, from known value
10522.17
Grand Avg 10590.90
1170.26
721.45
1369515.06
520495.84
11.12
6.81
-3.28
-2.65
-0.30
-0.40
10633.33
10646.67
-2.26
-2.14
-0.21
•0.32
-------
4/9	CRD-LV Performance Evaluation: Tritium in Water, 9-Aug-1996
r
Tritium
Lab Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known) Tag
A
10440.0
10630.0
10770.0
165.62
0.179
10613.33
0.04
-0.42

AE
11206.0
11378.0
11359.0
94.28
0.093
11314.33
1.15
0.69

AF
10916.0
11000.0
10948.0
42.39
0.046
10954.67
0.58
0.12

AH
10538.0
10438.0
10438.0
57.68
0.054
10471.33
-0.19
-0.65

AI
10200.0
10600.0
10200.0
230.94
0.217
10333.33
-0.41
-0.87

AJ
10915.0
10931.0
11042.0
69.21
0.069
10962.67
0.59
0.13

AK
10800.0
10450.0
10460.0
199.26
0.190
10570.00
-0.03
-0.49

AP
10164.0
10327.0
10485.0
160.52
0.174
10325.33
-0.42
-0.88

AU
10300.0
10400.0
10400.0
57.80
0.054
10366.67
-0.36
-0.82

AW
AY
10475.0
10423.0
10410.0
34.29
0.035
10436.00
-0.25
-0.71

(11
AZ
10513.0
10747.0
11380.0
448.54
0.471
10880.00
0.46
0.00
•
BA
10206.0
10148.0
10650.0
274.63
0.273
10334.67
-0.41
-0.87

BB
9710.0
10490.0
10510.0
456.21
0.434
10236.67
-0.56
-1.02

BC
9530.0
9400.0
9790.0
198.57
0.212
9573.33
-1.62
-2.08

BG








$
BL
10927.0
10902.0
10892.0
18.18
0.019
10907.00
0.50
0.04

BM
10700.0
10880.0
10550.0
165.25
0.179
10710.00
0.19
-0.27

BO
10700.0
10900.0
10700.0
115.50
0.109
10766.67
0.28
-0.18

BW








•
C
9220.0
8697.0
8959.0
261.50
0.284
8958.67
-2.60
-3.06

CA
10626.0
10670.0
10684.0
30.33
0.031
10660.00
0.11
-0.35

CC
10298.0
9959.0
10144.0
169.75
0.184
10133.67
-0.73
-1.19

CE
10570.0
10300.0
10150.0
212.85
0.228
10340.00
-0.40
-0.86

CG
9575.0
9367.0
9900.0
268.64
0.289
9614.00
-1.56
-2.01

CJ
9400.0
10000.0
10000.0
346.41
0.326
9800.00
-1.26
-1.72

CO
10100.0
9920.0
10100.0
103.92
0.098
10040.00
-0.88
-1.34

cs









cx
10600.0
10900.0
11100.0
251.66
0.271
10866.67
0.44
-0.02

D
10534.0
10998.0
10882.0
241.46
0.252
10804.67
0.34
-0.12

DD
11300.0
10700.0
10900.0
305.52
0.326
10966.67
0.60
0.14

DE
10805.0
10845.0
10896.0
45.60
0.049
10848.67
0.41
-0.05

DH
12038.0
11489.0
11817.0
276.24
0.298
11781.33
1.90
1.44

DI
10400.0
10700.0
10600.0
152.78
0.163
10566.67
-0.04
-0.50

DR
10918.0
11274.0
11298.0
212.79
0.206
11163.33
0.91
0.45

DT
10300.0
10100.0
10300.0
115.50
0.109
10233.33
-0.57
-1.03

E
10133.0
10846.0
10449.0
357.27
0.387
10476.00
-0.18
-0.64

EA
10968.0
10925.0
11020.0
47.61
0.052
10971.00
0.61
0.15

EB
10300.0
9400.0
9500.0
493.29
0.489
9733.33
-1.37
-1.82

EH
10000.0
10200.0
10600.0
305.51
0.326
10266.67
-0.52
-0.97

EL
9850.0
10280.0
10550.0
353.03
0.380
10226.67
-0.58
-1.04

EW








.#
EX
12160.0
12275.0
12260.0
62.54
0.062
12231.67
2.61
2.15

FE
10700.0
10900.0
10700.0
115.50
0.109
10766.67
0.28
-0.18

FJ
8450.0
7780.0
7800.0
366 92
0.364
8030.0Q
^8
4.54:
*
• =
0 =
No data submitted
Insufficient data
X =
TAG SYMBOLS
Determined to be an outlier
ft s Above control limit
II = Below control limit
				
-------
CRD-LV Performance Evaluation: Tritium in Water, 9-Aug-1996	5/9
Vi
N
Tritium
Lab Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known) Tag
FL
10744.0
10666.0
10634.0
56.54
0.060
10681.33
0.14
-0.31
FZ
10600.0
11100.0
10500.0
321.46
0.326
10733.33
0.23
-0.23
GO,







m
GQ
10400.0
10600.0
10900.0
251.68
0.271
10633.33
0.07
-0.39
m
9147.0
9100.0
9149.0
27.71
0.027
9132.00
-2.32
-2.78
HK;







»
HP
9840.0
9880.0
9550.0
180.09
0.179
9756.67
-1.33
-1.79
HE
11402.0
11450.0
11581.0
92.69
0.097
11477.67
1.41
0.95
I
TA
8133.0
8258.0
8275.0
77.52
0.077
8222.00
-3.77
-4.23 U
In
IU
10750.0
10910.0
10400.0
260.82
0.277
10686.67
0.15
-0.31
j
10844.0
11239.0
10740.0
263.28
0.271
10941.00
0.56
0.10
JE
11245.0
11380.0
11030.0
176.52
0.190
11218.33
1.00
0.54
JK
10989.0
10856.0
11438.0
304.95
0.316
11094.33
0.80
0.34
JM
9234.0
10701.0
10658.0
834.84
0.796
10197.67
-0.63
-1.08
JN
12917.0
12646.0
12482.0
219.68
0.236
12681.67
3.33
2.87
JP
10792.0
10654.0
10623.0
89.95
0.092
10689.67
0.16
-0.30
JR
9560.0
9560.0
9233.0
188.79
0.178
9451.00
-1.81
-2.27
JS
11900.0
11700.0
11400.0
251.66
0.271
11666.67
1.71
1.25
JY
10100.0
10100.0
9990.0
63.49
0.060
10063.33
-0.84
-1.30
K
10470.0
10321.0
10186.0
142.04
0.154
10325.67
-0.42
-0.88
KH
10795.0
10734.0
10738.0
34.12
0.033
10755.67
0.26
-0.20
KM
10412.0
11476.0
10601.0
567.67
0.578
10829.67
0.38
-0.08
KX
10470.0
10570.0
10340.0
115.34
0.125
10460.00
-0.21
-0.67
L
9931.0
9915.0
9728.0
112.90
0.110
9858.00
-1.17
-1.63
LE
10400.0
10200.0
10200.0
115.47
0.109
10266.67
-0.52
-0.97
LF
11000.0
11000.0
11000.0
0.00
0.000
11000.00
0.65
0.19
LR
11200.0
11244.0
11300.0
50.12
0.054
11248.00
1.05
0.59
LT
10803.0
10720.0
10586.0
109.46
0.118
10703.00
0.18
-0.28
M
10700.0
10600.0
10700.0
57.74
0.054
10666.67
0.12
-0.34
MN
9800.0
9800.0
10000.0
115.47
0.109
9866.67
-1.15
-1.61
MT








MV
10810.0
10766.0
10449.0
196.94
0.196
10675.00
0.13
-0.32
N
10836.0
10900.0
10916.0
42.43
0.043
10884.00
0.47
0.01
NB
10433.0
10710.0
10213.0
249.05
0.270
10452.00
-0.22
-0.68
NH
10705.0
10694.0
10745.0
26.93
0.028
10714.67
0.20
-0.26
NJ
10452.0
11310.0
10640.0
451.01
0.466
10800.67
0.33
-0.12
NO
10723.0
11174.0
11326.0
313.62
0.327
11074.33
0.77
0.31
O
10818.0
10394.0
10977.0
301.36
0.317
10729.67
0.22
-0.24
OA
11400.0
11400.0
12000.0
346.41
0.326
11600.00
1.61
1.15
OK
10139.0
10403.0
10284.0
132.24
0.143
10275.33
-0.50
-0.96
OM







•
ot
9580.0
10400.0
10200.0
427.56
0.445
10060.00
-0.85
-1.30
ox
11075.0
11063.0
10931.0
79.89
0.078
11023.00
0.69
0.23
PB
10732.0
10773.0
10778.0
25.11
0.025
10761.00
0.27
-0.19
• =
1 0 =
No data submitted
Insufficient data
x =
TAG SYMBOLS
Determined to be an outlier
It = Above control limit
s Below control limit
-------
6/9
CRD-LV Performance Evaluation: Tritium in Water,
9-Aug-1996


Tritium







>
Lab
Res. 1
Res. 2

Exper.
Rng anal

Normalized deviation

Res. 3
Sigma
(R + SR)
Average
(grand-avg)
(known) Tag
PE
9613.0
9257.0
9588.0
198.70
0.193
9486.00
-1.76
-2.22

PM
10617.0
10797.0
10456.0
170.60
0.185
10623.33
0.05
-0.41

PQ
9669.0
10321.0
10449.0
418.31
0.423
10146.33
-0.71
-1.17

PV
12352.0
11842.0
11854.0
291.04
0.277
12016.00
2.27
1.81

Q
11135.0
11830.0
11615.0
355.82
0.377
11526.67
1.49
1.03

<*c








•
QD
11078.0
11138.0
10311.0
461.13
0.449
10842.33
0.40
-0.06

Ql
10401.0
10452.0
10644.0
128.13
0.132
10499.00
-0.15
-0.60

QJ








-•
QM
10259.0
10023.0
10393.0
187.31
0.201
10225.00
-0.58
-1.04

QP
11981.0
12075.0
11628.0
235.69
0.243
11894.67
2.08
1.62

QQ
11335.0
11270.0
11208.0
63.55
0.069
11271.00
1.08
0.62

QT
12099.0
11664.0
11536.0
295.11
0.306
11766.33
1.87
1.41

QU
12074.0
11531.0
10750.0
665.56
0.719
11451.67
1.37
0.91

QW
11298.0
10731.0
10578.0
379.32
0.391
10869.00
0.44
-0.02

ox
11777.0
11661.0
11952.0
146.48
0.158
11796.67
1.92
1.46

Qz
10660.0
10760.0
10700.0
50.33
0.054
10706.67
0.18
-0.27

R
9775.0
9877.0
9610.0
134.74
0.145
9754.00
-1.33
-1.79

RB
10500.0
10100.0
10400.0
208.17
0.217
10333.33
-0.41
-0.87

RF
11747.0
9640.0
9938.0
1140.23
1.274
10441.67
-0.24
-0.70

RH
10090.0
10230.0
10549.0
235.24
0.249
10289.67
-0.48
-0.94

RK
10600.0
13400.0
11300.0
1457.17
1.991
11766.67
1.87
1.41

RO
10107.0
10202.0
10306.0
99.53
0.108
10205.00
-0.61
-1.07

RR
11000.0
11000.0
11000.0
0.00
0.000
11000.00
0.65
0.19

RU
10793.0
11486.0
11090.0
347.68
0.376
11123.00
0.85
0.39

RX
11147.0
10674.0
9180.0
1026.71
1.129
10333.67
-0.41
-0.87

S
10828.0
10638.0
10804.0
103.46
0.103
10756.67
0.26
-0.19

sc
10263.0
10620.0
10640.0
212.12
0.205
10507.67
-0.13
-0.59

SD









SF
10790.0
10990.0
10770.0
121.63
0.119
10850.00
0.41
-0.05

SI
10400.0
10400.0
10500.0
57.80
0.054
10433.33
-0.25
-0.71

SM
9260.0
9770.0
9810.0
306.66
0.299
9613.33
-1.56
-2.01

SN
10205.0
10305.0
10305.0
57.69
0.054
10271.67
-0.51
-0.97

SS
9938.0
9895.0
9878.0
30.98
0.033
9903.67
-1.09
-1.55

su
169.0
1620
161.0
1.53
0.602
160.67
-16.60
-17.06
X
sv









sz
10809.0
10991.0
11196.0
193.61
0.210
10998.67
0.65
0.19

T
10028.0
10055.0
10155.0
66.93
0.069
10079.33
-0.81
-1.27

TA
11000.0
12000.0
8800.0
1637.07
2.404
10600.00
0.01
-0.44

TC
8160.0
9631.0
9239.0
761.77
0.799
9010.00
-2.52
-2.98

TD
8994.0
8800.0
8748.0
129.64
0.134
8847.33
-2.78
-3.23

TF








-v«
TG
9681.0
9456.0
9501.0
119.04
0.122
9546.00
-1.66
-2.12

TH
9849.0
9482.0
9858.0
214.54
0.204
9729.67
-1.37
-1.83

TL








m
• =
No data submitted

TAG SYMBOLS

IT s Above control limit
10-
Insufficient data
x =
Determined to be an outlier
JJ = Below control limit
	——	yj
-------
CRD-LV Performance Evaluation: Tritium in Water, 9-Aug-1996
7/9
Tritium
Lab Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known) Tag
TN
10390.0
10859.0
10349.0
283.35
0.277
10532.67
-0.09
-0.55

TQ









TU
12217.0
11677.0
12082.0
281.03
0.293
11992.00
2.23
1.77

rw








.ik
rx









u
10960.0
11340.0
10880.0
245.78
0.250
11060.00
0.75
0.29

uc









UE
10600.0
10700.0
10300.0
208.17
0.217
10533.33
-0.09
-0.55

tn









UK
1402010
1315&0
13675.0
435,43
0.470
1361667
&S2.
4:36
X
UN
9098.0
9803.0
9925.0
446.44
0.449
9608.67
-1.56
-2.02

uo









UP
9482.0
9258.0
9911.0
331.83
0.355
9550.33
-1.66
-2.12

UT
10719.0
10727.0
10724.0
3.92
0.004
10723.33
0.21
-0.25

UX
11555.0
11965.0
11975.0
239.65
0.228
11831.67
1.98
1.52

VA
11559.0
12814.0
12053.0
632.21
0.681
12142.00
2.47
2.01

VC
10996.0
10818.0
10955.0
93.18
0.097
10923.00
0.53
0.07

VE
11042.0
10554.0
9935.0
554.79
0.601
10510.33
-0.13
-0.59

VI
10100.0
9890.0
10400.0
256.33
0.277
10130.00
-0.73
-1.19

VM
11095.0
11086.0
11050.0
23.89
0.024
11077.00
0.77
0.32

VN








0
VP
8874.0
8514.0
8694.0
180.01
0.195
8694.00
-3.02
-3.48

VR
9689.0
9734.0
11272.0
901.24
0.859
10231.67
-0.57
-1.03

VW
1/7
11171.0
10486.0
10756.0
345.05
0.372
10804.33
0.34
-0.12

T L
w
10480.0
10150.0
10547.0
212.51
0.216
10392.33
-0.32
-0.77

WD
9674.0
9946.0
9951.0
158.49
0.150
9857.00
-1.17
-1.63

WF








M
WH
10753.0
11673.0
11596.0
510.39
0.499
11340.67
1.19
0.73

WJ








~I
WO








•*
WP
10742.0
9892.0
10308.0
425.03
0.461
10314.00
-0.44
-0.90

WR
11101.0
11098.0
11327.0
131.33
0.124
11175.33
0.93
0.47

ws









WT








•
WV









WW
10589.0
11005.0
10818.0
208.37
0.226
10804.00
0.34
-0.12

wx








•
wz
10085.0
9809.0
10300.0
246.12
0.267
10064.67
-0.84
-1.30

X
11814.0
11812.0
11890.0
44.51
0.042
11838.67
1.99
1.53

Y
10466.0
10779.0
10854.0
205.81
0.211
10699.67
0.17
-0.29

Average
Tag_
Data sorted by Laboratory Average
Lab Average	Tag	Lab
Average
Tag.
Lab
160.67
SU
8030.00
FJ
8222.00

• = No data submitted
0 = Insufficient data
TAG SYMBOLS
x = Determined to be an outlier
ft s Above control limit
II = Below control limit
-------
8/9	CRD-LV Performance Evaluation: Tritium in Water, 9-Aug-1996
I		
/*	1	¦	¦ ¦ - —	¦¦ —'~r..
Tritium
Data sorted by Laboratory Average
Average
Tag
Lab
Average
Tag
Lab
Average
Tag
Lab
8694.00

VP
10325.67

K
10766.67

BO
8847.33

TD
10333.33

RB
10800.67

NJ
8958.67

C
10333.33

AI
10804.00

WW
9010.00

TC
10333.67

RX
10804.33

VW
9132.00

HI
10334.67

BA
10804.67

D
9451.00

JR
10340.00

CE
10829.67

KM
9486.00

PE
10366.67

AU
10842.33

QD
9546.00

TG
10392.33

W
10848.67

DE
9550.33

UP
10433.33

SI
10850.00

SF
9573.33

BC
10436.00

AW
10866.67

CX
9608.67

UN
10441.67

RF
10869.00

QW
9613.33

SM
10452.00

NB
10880.00

AZ
9614.00

CG
10460.00

KX
10884.00

N
9729.67

TH
10471.33

AH
10907.00

BL
9733.33

EB
10476.00

E
10923.00

VC
9754.00

R
10499.00

QI
10941.00

J
9756.67

HP
10507.67

sc
10954.67

AF
9800.00

CJ
10510.33

VE
10962.67

AJ
9857.00

WD
10532.67

TN
10966.67

DD
9858.00

L
10533.33

UE
10971.00

EA
9866.67

MN
10566.67

DI
10998.67

SZ
9903.67

SS
10570.00

AK
11000.00

RR
10040.00

CO
10600.00

TA
11000.00

LF
10060.00

OT
10613.33

A
11023.00

OX
10063.33

JY
10623.33

PM
11060.00

U
10064.67

WZ
10633.33

GQ
11074.33

NO
10079.33

T
10660.00

CA
11077.00

VM
10130.00

VI
10666.67

M
11094.33

JK
10133.67

CC
10675.00

MV
11123.00

RU
10146.33

PQ
10681.33

FL
11163.33

DR
10197.67

JM
10686.67

IU
11175.33

WR
10205.00

RO
10689.67

JP
11218.33

JE
10225.00

QM
10699.67

Y
11248.00

LR
10226.67

EL
10703.00

LT
11271.00

QQ
10231.67

VR
10706.67

QZ
11314.33

AE
10233.33

DT
10710.00

BM
11340.67

WH
10236.67

BB
10714.67

NH
11451.67

QU
10266.67

LE
10723.33

UT
11477.67

HR
10266.67

EH
10729.67

O
11526.67

Q
10271.67

SN
10733.33

FZ
11600.00

OA
10275.33

OK
10755.67

KH
11666.67

JS
10289.67

RH
10756.67

S
11766.33

QT
10314.00

WP
10761.00

PB
11766.67

RK
10325.33

AP
10766.67

FE
11781.33

DH
• s No data submitted

TAG SYMBOLS

ft
= Above control limit
1 0 = Insufficient data	x = Determined to be an outlier	^ = Below control limit
-------
CRD-LV Performance Evaluation: Tritium in Water, 9-Aug-1996
9/9
Tritium
Data sorted by Laboratory Average
Average
Tag
Lab
Average
Tag
Lab
Average
Tag
Lab
11796.67

QX
11894.67

QP
12142.00

VA
11831.67

ux
11992.00

TU
12231.67

EX
11838.67

X
12016.00

PV
12681.67
13616.67
X
JN
UK
% responding labs
Frequency distribution
10-
0-»--r
—j-



~+T
-6
% responding labs
4	-2	0	+2
Normalized deviation of the mean from the known value
Frequency distribution
10-
0
-6

-4	-2	0	+2	+4
Normalized deviation of the mean from the grand average
+6
• s No data submitted
0 = Insufficient data
TAG SYMBOLS
x = Determined to be an outlier
IT = Above control limit
JJ. = Below control limit
-------
United States	Office of Research and	EP/V600/R-96/144
Environmental Protection Development	December 1996
Agency	Washington, DC 20460
Uranium-Radium
in Water Performance
Evaluation Study
A Statistical Evaluation of
the September 27,1996 Data
023RSL96 COv-144
-------
Uranium-Radium in Water
Performance Evaluation Study
September 27, 1996
Environmental Protection Agency
National Exposure Research Laboratory
Characterization Research Division
Las Vegas, Nevada
-------
A
UNITED STATES ENVIRONMENTAL PROTECTION AGENCY
OFFICE OF RESEARCH AND DEVELOPMENT
NATIONAL EXPOSURE RESEARCH LABORATORY
CHARACTERIZATION RESEARCH DIVISION-LAS VEGAS
P.O. BOX 93478
LAS VEGAS, NEVADA 89193-3478
(702/798-2100)
V/
Dear Participant,
Enclosed are the results of the Analytical Sciences Branch (CRD-LV)
Performance Evaluation Study for Uranium-Radium In Water; September 27, 1996.
The known value for each analysis was determined by gravimetric methods,
checked by chemical analyses performed by CRD-LV's Radlochemistry Laboratory,
and compared to the participating laboratories' grand average.
The expected precision, determined by the known value, was taken from
'Table 3. Laboratory Precision: One Standard Deviation Values and Control Limits
for Various Analyses", which is based on data accumulated over the years by the
Performance Evaluation Program, and can be found in the Environmental Radioactivity
Performance Evaluation Studies Program and Radioactive Standards Distribution
Program information brochure.
Please take a few minutes to review this report and the analytical data your
laboratory submitted to us. If there are any apparent discrepancies, please notify us
immediately.
We encourage you to make use of the computer-automated data-entry system
that has been in place for some time now. As the number of participants increases,
and it becomes unrealistic for us to receive results by mail or FAX, the computer
system will be our only avenue for accepting data.
If you have any questions or comments, please send a message via the data-entry
system or contact Stephen Pla at 702/798-2102 or Patricia Honsa at 702/798-2141.
Stephen Pia
Team Leader
RADQA Program
Enclosure
-------
NOTICE
Thin material has been funded wholly by
the U.S. Environmental Protection Agency.
It has been subjected to the Agency's review,
and has been approved for publication as
an EPA document.
-------
CRD-LV Performance Evaluation: Uranium-Radium in Water, 27-Sep-1996 1/20
The following pages consist of separate sections for each of the nuclides in this study with four
parts per section. After the first, each part is separated from the next by a new page or a thick
horizontal bar. The first page of each section is a statistical summary for the nuclide and starts
with a statement of the known value, the control limits, and the warning limits
The warning limits are placed at two normalized standard deviations above and below the
known value and the control limits are three normalized standard deviations above and below
the known value. If you keep control charts, these values will be useful for anticipating problems
with the accuracy of your analytical methods.
The coin shaped pie chart at the top of the summary page shows the fate of all the samples
sent out in number and percentage terms. The pie chart starts at the top and rotates clockwise.
The first sector represents those participants who submitted analytical results within both the
warning and control limits. The next sector represents those who are in the warning region but
not out of control. The third sector represents those who are out of control, but have passed
the outlier test. The fourth sector represents those who have failed the outlier test. The last
sector represents those participants who have failed to respond properly. This is the case if no
analytical results were returned, or less than three determinations were reported, or if the results
were received too late. The reeding on the edge of the coin is spaced at one percent intervals, and
the sector shading becomes darker as the data reliability decreases. Sectors with zero width are
not shown.
The table in the center shows a number of statistical quantities calculated from the submitted
data based on the mean and median values in relation to the known value, both before and after
outlier removal. The lower pie chart uses the same construction as the upper chart and shows
the distribution of properly submitted data in terms of deviation from the known value divided
into sectors representing one, two, three, and greater than three normalized standard deviations.
The second part is an alphabetical listing, in lab-code order, of submitted data and several
calculated quantities. An entry that is shaded has been rejected because of one of the reasons
listed above or failure of the outlier test. The fifth and sixth columns are a measure of laboratory
precision. The Range analysis is a normalized value that you may use to keep precision control
charts. The eighth and ninth columns are the differences from the mean of all non-outliers and
from the known value, respectively. If this value is between 2.0 and 3.0, your analytical process
precision is in the warning zone; if it exceeds 3.0 it is out of control. A tag symbol may appear in
the last column. Each page with tags has a symbol definition summary at the bottom. If there is
no tag symbol, the data is within the control limits, but it may be in the warning zone.
The third part is a three-column listing of result average, tag symbol, and lab-code in average
order excluding those labs not responding properly. In this order, all outliers and out-of-control
results appear at the top or bottom of the list.
The last part is two bar chart displays showing frequency distributions of responding
participants. The first chart places the known value at the center and a bar at each 0.2 unit of
expected precision. The second chart places the mean of the reported measurements at the center
and a bar at each 0.2 unit of standard deviation. In both cases, a bar includes those results within
0.1 unit up to the maximum of six. Any results more than six units from the center value are
shown cumulatively by a shaded bar one past the sixth unit. If the central tendency of the known
value distribution falls away from the center, an error in accuracy is indicated. If the distribution
is broad, poor precision is indicated. The mean value distribution is similar but uses the average
and standard deviation of reported results as its basis.
-------
2/20
CRD-LV Performance Evaluation: Uranium-Radium in Water, 27-Sep-1996
The Range Analysis(R + SR) is calculated from the range, mean range and standard error of
the range values. The range is the difference between the maximum and minimum results fnr the
laboratory. The mean range is calculated by multiplying the expected precision by 1.693(for three
results). The standard error of the range is calculated by multiplying the mean range by 2.575(for
three results), subtracting the mean range from this product, and dividing the result by 3. If the
range is greater than the mean range, then the range analysis is calculated by subtracting the
mean range from the range, dividing the result by the standard error of the range and adding 1.
If the mean range is greater than or equal to the range, then the range analysis is calculated by
dividing the range by the mean range.
The normalized deviation of the mean from the grand average is calculated from the deviation
of the mean from the grand average and the standard error of the mean values. The deviation of
the mean from the grand average is calculated by subtracting the grand average from the
average of the laboratory's three results. The standard error of the mean is calculated by
dividing the expected precision by the square root of 3(the number of results). The normalized
deviation of the mean from the grand average is calculated by dividing the deviation of the mean
from the grand average by the standard error of the mean.
The normalized deviation of the mean from the known value is calculated from the deviation of
the mean from the known value and the standard error of the mean values. The deviation of the
mean from the known value is calculated by subtracting the known value from the average of the
laboratory's three results. The standard error of the mean is calculated by dividing the expected
precision by the square root of 3(the number of results). The normalized deviation of the mean
from the known value is calculated by dividing the deviation of the mean from the known value by
the standard error of the mean.
A complete explanation of the statistical calculations involved in the report may be found in
the Environmental Radioactivity Performance Evaluation Studies Program information brochure
[Draft Revision of EPA-600/4-81-004], available from Patricia Honsa, CRD-LV, 702/798-2141.
-------
==^?
CRD-LV Performance Evaluation: Uranium-Radium in Water, 27-Sep-1996 3/20
Uranium (Natural)	Statistical Summary	156 Participants
The known value of this nuclide is 10.1 pCi/1 with an expected precision of 3.0; the control limits
are 4.9 to 15.3; the warning regions are 4.9 to 6.6 and 13.6 to 15.3
Statistic		Respondents	Non-outliera
Mean
11.33
Grand Avg 10.03
Std. Dev.
5.97
1.38
Variance
35.60
1.90
% Coef. ofVar.
52.66
13.74
% deviation of mean from known value
12.18
-0.71
Norm. dev. of mean from known value
0.21
-0.05
Median
10.13
10.03
% deviation of median from known value
0.33
-0.66
Norm. dev. of median from known value
0.01
-0.05
-------
		
4/20 CRD-LV Performance Evaluation: Uranium-Radium in Water, 27-Sep-1996
		
Uranium (Natural)







Lab
Res. 1
Res. 2

Exper.
Rng anal

Normalized deviation

Res. 3
Sigma
(R + SR)
Average
(grand-avg)
(known) Tag
A
9.8
9.9
9.8
0.06
0.020
9.83
-0.11
-0.15

AE
10.3
10.1
10.5
0.20
0.079
10.30
0.16
0.12

AF
10.4
10.7
10.5
0.15
0.059
10.53
0.29
0.25

AH








• '
AJ
12.1
9.8
11.9
1.27
0.453
11.27
0.72
0.67

AK
10.2
10.7
9.8
0.45
0.177
10.23
0.12
0.08

AL
10.6
9.4
10.5
0.67
0.236
10.17
0.08
0.04

AP
7.2
8.9
9.8
1.32
0.512
8.63
-0.81
-0.85

AR
6.9
7.0
7.0
0.06
0.020
6.97
-1.77
-1.81

AU








•
AW
9.7
10.2
10.1
0.26
0.098
10.00
-0.02
-0.06

AZ
11.3
11.3
11.5
0.12
0.039
11.37
0.77
0.73

BA
8.9
9.7
8.8
0.49
0.177
9.13
-0.52
-0.56

BB
9.6
9.1
9.4
0.25
0.098
9.37
-0.38
-0.42

BC
9.9
9.9
9.9
0.00
0.000
9.90
-0.07
-0.12

BG
9.5
9.5
9.5
0.00
0.000
9.50
-0.30
-0.35

BG
10.0
9.8
10.0
0.12
0.039
9.93
-0.05
-0.10

BG
10.5
9.7
10.2
0.40
0.158
10.13
0.06
0.02

BH
9.1
11.3
9.2
1.24
0.433
9.87
-0.09
-0.13

BK
9.4
9.3
9.3
0.06
0.020
9.33
-0.40
-0.44

BM
10.8
10.3
10.6
0.25
0.098
10.57
0.31
0.27

BN
8.2
9.8
10.6
1.22
0.473
9.53
-0.29
-0.33

BO
9.0
9.7
9.8
0.44
0.158
9.50
-0.30
-0.35

C
10.2
10.1
10.3
0.10
0.039
10.20
0.10
0.06

CA
10.1
10.0
9.8
0.15
0.059
9.97
-0.04
-0.08

CC
24.6
26^0
25.3
0.40
0.158
24.93
8.61
8.56
X
CE
9.4
9.4
9.4
0.00
0.000
9.40
-0.36
-0.40

CG
8.8
12.5
7.3
2.68
1.045
9.53
-0.29
-0.33

CJ
9.8
9.3
8.8
0.50
0.197
9.30
-0.42
-0.46

CM








•
cs
9.0
8.9
9.1
0.10
0.039
9.00
-0.59
-0.64

cx
11.7
11.0
11.2
0.36
0.138
11.30
0.73
0.69

D
10.0
10.3
10.4
0.21
0.079
10.23
0.12
0.08

DB
10.6
10.7
8.3
1.36
0.473
9.87
-0.09
-0.13

DE
10.5
10.5
10.6
0.06
0.020
10.53
0.29
0.25

DI
10.0
9.5
9.9
0.26
0.098
9.80
-0.13
-0.17

DO
10.0
9.4
9.5
0.32
0.118
9.63
-0.23
-0.27

DR








•
DT
11.3
10.3
11.2
0.55
0.197
10.93
0.52
0.48

DZ
10.2
9.7
11.0
0.66
0.256
10.30
0.16
0.12

E
9.6
9.5
9.0
0.32
0.118
9.37
-0.38
-0.42

EB
10.1
10.2
10.3
0.10
0.039
10.20
0.10
0.06

EL
9.6
9.8
9.6
0.12
0.039
9.67
-0.21
-0.25

EO








•
EP








•
• =
No data submitted

TAG SYMBOLS

It = Above control limit
in
S>
—')
Insufficient data
x =
Determined to be an outlier
II = Below control limit
	'j
-------
CRD-LV Performance Evaluation: Uranium-Radium in Water, 27-Sep-1996 5/20
Uranium (Natural)
T ,	Exper. Rng anal	Normalized deviation
Lab Res. 1	Res. 2	Res. 3	Sigma (R + SR) Average fgrand-avg) (known) Tag
ER		:	~
FE
FJ
5.8
5.6
5.8
0.12
0.039
5.73
-2.48
-2.52
FN
18il
18;8
18.8
040
0.138
18.57
4,93
iM
FZ
11.3
10.5
11.3
0.46
0.158
11.03
0.58
0.54
GN
9.5
9.6
9.5
0.06
0.020
9.53
-0.29
-0.33
GQ
7.8
7.9
8.7
0.49
0.177
8.13
-1.09
-1.14
HK
10.2
10.3
10.7
0.26
0.098
10.40
0.21
0.17
HL
9.9
9.9
9.9
0.00
0.000
9.90
-0.07
-0.12
HP
8.9
9.0
8.2
0.44
0.158
8.70
-0.77
-0.81
I
46.8
45.4
38.3
4.22
1.908
4317
1&13
19.09
ID
11.3
11.6
10.2
0.74
0.276
11.03
0.58
0.54
J
JB
JG
JK
9.7
9.3
9.9
0.31
0.118
9.63
-0.23
-0.27

JN
22,4
19.6
17.5
2.46
0.965
1983
BM
5.62
k
JP
10.1
10.1
10.3
0.12
0.039
10.17
0.08
0.04

JS
10.1
10.1
9.9
0.12
0.039
10.03
0.00
-0.04

JK








*
JY
10.5
9.3
10.3
0.64
0.236
10.03
0.00
-0.04

K
12.7
10.6
11.6
1.05
0.413
11.63
0.93
0.89

KH
9.9
10.0
9.7
0.15
0.059
9.87
-0.09
-0.13

KL








•
KT
1U.0
11.0
12.0
1.00
0.394
11.00
0.56
0.52

L
9.5
10.2
10.7
0.60
0.236
10.13
0.06
0.02

LF
12.5
13.0
12.7
0.25
0.098
12.73
1.56
1.52

LH
11.0
11.0
10.0
0.58
0.197
10.67
0.37
0.33

LT
7.8
9.7
8.7
0.95
0.374
8.73
-0.75
-0.79

LZ
9.7
10.1
10.1
0.23
0.079
9.97
-0.04
-0.08

M








*
MX
35,8
34.2
34.6
0.83
0.315
34.87
14.34
14.30
*
N
11.5
12.1
11.3
0.42
0.158
11.63
0.93
0.89

NA
10.0
11.0
12.0
1.00
0.394
11.00
0.56
0.52

NH
10.6
10.1
9.1
0.76
0.295
9.93
-0.05
-0.10

NJ
9.8
11.1
11.2
0.78
0.276
10.70
0.39
0.35

NK
10.3
10.3
10.9
0.35
0.118
10.50
0.27
0.23

NO
10.5
11.0
11.5
0.50
0.197
11.00
0.56
0.52

NT
n
14.8
12.9
11.1
1.85
0.728
12.93
1.68
1.64

V#
OB
11.1
10.0
9.8
0.70
0.256
10.30
0.16
0.12
OF








•
OM








•
OS
10.5
10.3
10.6
0.15
0.059
10.47
0.25
0.21

OX
9.6
9.6
9.6
0.00
0.000
9.60
-0.25
-0.29

0 3
No data submitted
Insufficient data
TAG SYMBOLS
x s Determined to be an outlier
IT s Above control limit
II a Below control limit
-------
6/20 CRD-LV Performance Evaluation: Uranium-Radium in Water, 27-Sep>1996
Uranium (Natural)
Lab
Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known) Tag
OY







•
P
13.9
8.2
8.2
3.29
1.233
10.10
0.04
0.00
PB
10.8
10.6
10.7
0.10
0.039
10.70
0.39
0.35
PG
6.4
6.7
7.9
0.79
0.295
7.00
-1.75
-1.79
PQ
9.9
10.0
10.0
0.06
0.020
9.97
-0.04
-0.08
PV
8.1
8.2
8.2
0.06
0.020
8.17
-1.07
-1.12
PW
10.0
9.6
9.5
0.26
0.098
9.70
-0.19
-0.23
PX
10.5
10.1
10.7
0.31
0.118
10.43
0.23
0.19
Q
10.9
11.6
11.2
0.35
0.138
11.23
0.70
0.65
QJ







•
QM
14.9
14.7
14.1
0.42
0.158
14.57
2.62
2.58
QQ
9.6
10.3
11.0
0.70
0.276
10.30
0.16
0.12
QU
8.0
7.7
7.4
0.30
0.118
7.70
-1.34
-1.39
QX
7.1
7.2
7.5
0.21
0.079
7.27
-1.59
-1.64
QY
10.0
9.6
9.7
0.21
0.079
9.77
-0.15
-0.19
QZ
10.3
10.3
10.3
0.00
0.000
10.30
0.16
0.12
R







•
RD
6.5
6.5
6.4
0.06
0.020
6.47
-2.06
-2.10
RF








RG
10.2
10.3
10.1
0.10
0.039
10.20
0.10
0.06
RK







•
RP
42.1
41.3
42.0
0.44
0.158
41.80
18.34
18.30 x
RR
10.7
10.4
10.5
0.15
0.059
10.53
0.29
0.25
RX
13.0
12.0
10.0
1.53
0.591
11.67
0.95
0.90
RZ
9.9
9.4
9.6
0.25
0.098
9.63
-0.23
-0.27
S
7.4
7.2
7.3
0.10
0.039
7.30
-1.58
-1.62
sc
44.6
40.3
42.4
2.15
0.847
42.43
18.71
18.67 x
SD
8.4
8.3
7.7
0.38
0.138
8.13
-1.09
-1.14
SF
16.1
17.3
15.0
1.15
0.453
16.13
3.52
3.48 X
SI
15.0
14.5
15.6
0.55
0.217
15.03
2.89
2.85
SL
9.8
10.7
10.8
0.55
0.197
10.43
0.23
0.19
SM
9.4
9.2
8.7
0.36
0.138
9.10
-0.54
-0.58
SO
9.7
9.4
9.5
0.15
0.059
9.53
-0.29
-0.33
ss
10.7
10.7
11.1
0.23
0.079
10.83
0.46
0.42
sx







9
sz
9.6
9.7
9.6
0.06
0.020
9.63
-0.23
-0.27
T







«
TD
8.4
8.4
8.4
0.00
0.000
8.40
-0.94
-0.98
TH







•
TL







•
TN







•
TQ
10.2
10.2
10.3
0.06
0.020
10.23
0.12
0.08
TS







•
U
9.6
10.0
10.1
0.26
0.098
9.90
-0.07
-0.12
UE
9.8
10.0
9.8
0.12
0.039
9.87
-0.09
-0.13
• =
No data submitted

TAG SYMBOLS

ft s Above control limit
0 h Insufficient data	x = Determined to be an outlier	U = Below control limit
^		y
-------
CRD-LV Performance Evaluation: Uranium-Radium in Water, 27-Sep-1996 7
/ 20
Uranium (Natural)
Lab Res. 1 Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known) Tag
UN
5.2
5;1
3.9
0.72
0.259
4;73"
'3106
*310
X
UP
9.7
8.9
9.1
0.42
0.158
9.23
-0.46
-0.50

UQ









UZ
10.8
14.9
9.0
3.02
1.308
11.57
0.89
0.85

VA








•
VH
10.0
13.0
10.7
1.57
0.591
11.23
0.70
0.65

VI
10.7
10.1
10.6
0.32
0.118
10.47
0.25
0.21

W








•
wc:








•
WG
11.7
11.6
11.2
0.26
0.098
11.50
0.85
0.81

WH
12.9
12.8
11.8
0.61
0.217
12.50
1.43
1.39

WI
9.8
9.5
9.5
0.17
0.059
9.60
-0.25
-0.29

WJ
8.5
8.1
8.6
0.26
0.098
8.40
-0.94
-0.98

wo
8.4
8.6
8.2
0.20
0.079
8.40
-0.94
-0.98

WR
10.1
10.3
10.4
0.15
0.059
10.27
0.14
0.10

ws








*
WV








*
wx









WY








•>
X
10.2
10.5
11.4
0.62
0.236
10.70
0.39
0.35

XA
12.8
11.7
13.7
1.00
0.394
12.73
1.56
1.52

Data sorted by Laboratory Average
Average
Tag
Lab
Average
Tag
Lab
Average
Tag
Lab
4.73
X
UN
9.30

CJ
9.83

A
5.73

FJ
9.33

BK
9.87

UE
6.47

RD
9.37

E
9.87

KH
6.97

AR
9.37

BB
9.87

DB
7.00

PG
9.40

CE
9.87

BH
7.27

QX
9.50

BO
9.90

HL
7.30

S
9.50

BG
9.90

BC
7.70

QU
9.53

SO
9.90

U
8.13

SD
9.53

GN
9.93

NH
8.13

GQ
9.53

CG
9.93

BG
8.17

PV
9.53

BN
9.97

PQ
8.40

TD
9.60

WI
9.97

LZ
8.40

wo
9.60

OX
9.97

CA
8.40

WJ
9.63

RZ
10.00

AW
8.63

AP
9.63

JK
10.03

JY
8.70

HP
9.63

DO
10.03

JS
8.73

LT
9.63

SZ
10.10

P
9.00

CS
9.67

EL
10.13

L
9.10

SM
9.70

PW
10.13

BG
9.13

BA
9.77

QY
10.17

JP
9.23

UP
9.80

DI
10.17

AL
• a No data submitted
0 a Insufficient data

TAG SYMBOLS
x 3 Determined to be an outlier
ft
s Above control limit
a Below control limit
-------
8/20 CRD-LV Performance Evaluation: Uranium-Radium in Water, 27-Sep-1996
Uranium (Natural)
Data sorted by Laboratory Average
Average
Tag
Lab
Average
Tag
Lab
Average
Tag
Lab
10.20

RG
10.53

DE
11.50

WG
10.20

EB
10.53

AF
11.57

UZ
10.20

C
10.57

BM
11.63

N
10.23

TQ
10.67

LH
11.63

K
10.23

D
10.70

X
11.67

RX
10.23

AK
10.70

PB
12.50

WH
10.27

WR
10.70

NJ
12.73

XA
10.30

QZ
10.83

SS
12.73

LF
10.30

QQ
10.93

DT
12.93

NT
10.30

OB
11.00

NO
14.57

QM
10.30

DZ
11.00

NA
15.03

SI
10.30

AE
11.00

KT
16.13
X
SF
10.40

HK
11.03

ID
18.57
X
FN
10.43

SL
11.03

FZ
19.83
X
JN
10.43

PX
11.23

VH
24.93
X
CC
10.47

VI
11.23

Q
34.87
X
MX
10.47

08
11.27

AJ
41.80
X
RP
10.50

NK
11.30

CX
42.43
X
SC
10.53

RR
11.37

AZ
43.17
X
I
% responding labs
Frequency distribution
10-

'-¦fl
S3
-4	-2	0	+2
Normalized deviation of the mean from the known value
+4
+6
% responding labs
Frequency distribution
20-
10-
o
¦¦¦¦ ¦¦
-6
-4	-2	0	+2	+4
Normalized deviation of the mean from the grand average
+6
0
a No data submitted
= Insufficient data
TAG SYMBOLS
x = Determined to be sin outlier
ft = Above control limit
U 3 Below control limit
-------
CRD-LV Performance Evaluation: Uranium-Radium in Water, 27-Sep-1996 9/20
Radium-226	Statistical Summary	154 Participants
The known value of this nuclide is 14.0 pCi/1 with an expected precision of 2.1; the control limits
are 10.4 to 17.6; the warning regions are 10.4 to 11.6 and 16.4 to 17.6
52(33.8 %) Failed to respond •
6(3.9 %) Outliers -
8(5.2 %) Out of control "
but not an outlier
Statistic
77(50.0 %) Within all limits
Respondents
11(7.1 %) In warning zone
but within control
Non-outliers
Mean
13.54
Grand Avg 13.64
Std. Dev.
3.14
2.00
Variance
9.88
3.99
% Coef. of Var.
23.20
14.64
% deviation of mean from known value
-3.25
-2.55
Norm. dev. of mean from known value
-0.14
-0.18
Median
13.47
13.48
% deviation of median from known value
-3.81
-3.69
Norm. dev. of median from known value
-0.17
-0.26
-------
10/20
CRD-LV Performance Evaluation: Uranium-Radium in Water, 27-Sep-1996
Radium-226
Lab Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known) Tag
A
10.9
10.6
10.9
0.17
0.084
10.80
-2.34
-2.64

AE
11.9
12.3
12.4
0.26
0.141
12.20
-1.19
-1.48

AF
13.3
13.4
13.5
0.10
0.056
13.40
-0 20
-0.49

AH








•
AJ
21i0
18.8
22.2
L72
0.956
20.67
&7fr
5.50
X
AK
15.8
16.6
15.2
0.70
0.394
15.87
1.83
1.54

AL
12.9
13.0
14.5
0.90
0.450
13.47
-0.15
-0.44

AP
12.7
11.7
11.4
0.68
0.366
11.93
-1.41
-1.70

AR








•
AU








•-
AW
13.3
13.6
14.3
0.51
0.281
13.73
0.07
-0.22

AZ
12.0
13.3
12.6
0.65
0.366
12.63
-0.83
-1.13

BA
12.6
10.1
10.3
1.39
0.703
11.00
-2.18
-2.47

BB








•
BC
13.2
14.6
13.1
0.84
0.422
13.63
-0.01
-0.30

BG








•
BH
12.4
11.5
14.3
1.43
0.788
12.73
-0.75
-1.04

BK
13.2
13.5
13.4
0.15
0.084
13.37
-0.23
-0.52

BM
12.9
13.2
13.8
0.46
0.253
13.30
-0.28
-0.58

BN
12.2
12.5
12.7
0.25
0.141
12.47
-0.97
-1.26

BO
14.2
14.8
14.2
0.35
0.169
14.40
0.62
0.33

C
12.0
12.3
12.4
0.21
0.113
12.23
-1.16
-1.46

CA
13.8
13.1
13.9
0.44
0.225
13.60
-0.04
-0.33

CO
4.8
4,T
5.2
0;26
0.141
4.90
-7.21
-7.51
X
CE
12.2
13.4
12.5
0.62
0.338
12.70
-0.78
-1.07

CG
13.4
15.9
13.4
1.44
0.703
14.23
0.49
0.19

CJ
14.0
13.0
15.0
1.00
0.563
14.00
0.29
0.00

CM









CS
16.8
13.6
14.1
1.72
0.900
14.83
0.98
0.69

CX








•
D








•
DB
10.9
11.2
12.1
0.62
0.338
11.40
-1.85
-2.14

DE
15.7
15.8
15.9
0.10
0.056
15.80
1.78
1.48

DI








9
DO









DR








•
DT
13.3
12.2
13.1
0.59
0.309
12.87
-0.64
-0.93

DZ
12.3
13.9
13.4
0.82
0.450
13.20
-0.37
-0.66

E
11.2
11.3
10.9
0.21
0.113
11.13
-2.07
-2.36

EB
13.2
13.3
13.4
0.10
0.056
13.30
-0.28
-0.58

EL
13.2
13.4
13.0
0.20
0.113
13.20
-0.37
-0.66

EO
14.8
14.2
11.5
1.76
0.928
13.50
-0.12
-0.41

EP
12.2
12.1
11.7
0.26
0.141
12.00
-1.35
-1.65

ER








«
FE








•
• 5
0 -
No data submitted
Insufficient data
x =
TAG SYMBOLS
Determined to be an outlier
1t = Above control limit
U = Below control limit
-------
CRD-LV Performance Evaluation: Uranium-Radium in Water, 27-Sep-1996 11/20
Radium-226
Lab Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
fgrand-avg) (known) Tag
FJ








•
FN
12.2
12.8
13.0
0.42
0.225
12.67
-0.81
-1.10

FZ
15.1
15.6
14.4
0.60
0.338
15.03
1.15
0.85

GN
14.8
14.1
14.2
0.38
0.197
14.37
0.60
0.30

GQ
14.6
13.6
14.1
0.50
0.281
14.10
0.38
0.08

HK
14.0
13.6
13.5
0.26
0.141
13.70
0.05
-0.25

HL
12.3
12.3
12.3
0.00
0.000
12.30
-1.11
-1.40

HP
15.9
15.8
16.5
0.38
0.197
16.07
2.00
1.70

I
9.4
9.4
9.9
0.29
0.141
9.57
-3.36
-3.66

ID
.r
16.0
13.6
17.8
2.11
1.345
15.80
1.78
1.48

V
JB








•
•
JG
15.1
15.2
14.7
0.26
0.141
15.00
1.12
0.82

JK








~
JN








~
JP








*
JS
14.3
12.7
16.3
1.80
1.024
14.43
0.65
0.36

JX
14.2
13.8
15.5
0.89
0.478
14.50
0.71
0.41

JY









K
13.0
13.6
12.3
0.65
0.366
12.97
-0.56
-0.85

KH
13.5
13.3
13.1
0.20
0.113
13.30
-0.28
-0.58

KL
20.0
20.8
17.8
1.55
0.844
19.53
4.86
4.56
ft
KT








•
L
13.1
13.0
13.7
0.38
0.197
13.27
-0.31
-0.60

LF








•
LH








•-
LT
16.1
19.1
18.3
1.55
0.844
17.83
3.46
3.16
IT
LZ
16.3
16.2
16.2
0.06
0.028
16.23
2.14
1.84

M
9.0
7.9
9.0
0.64
0.309
8.63
-4.13
-4.43
11
MX
12.3
14.3
13.8
1.04
0.563
13.47
-0.15
-0.44

N
14.0
13.7
14.0
0.17
0.084
13.90
0.21
-0.08

NA








•
NH
14.2
12.1
13.3
1.05
0.591
13.20
-0.37
-0.66

NJ
14.1
13.7
16.6
1.57
0.816
14.80
0.95
0.66

NK








•
NO
14.3
14.7
14.9
0.31
0.169
14.63
0.82
0.52

NT
14.0
14.2
14.3
0.15
0.084
14.17
0.43
0.14

O
14.6
13.9
14.2
0.35
0.197
14.23
0.49
0.19

OB
14.6
14.5
14.6
0.06
0.028
14.57
0.76
0.47

OF
9.5
10.0
9.0
0.50
0.281
9.50
-3.42
-3.71

OM








*
OS








*
OX
13.3
13.9
14.0
0.38
0.197
13.73
0.07
-0.22

or









p
19.9
18.2
20.0
1.01
0.506
19.37
4.72
4.43
ir
• 3 No data submitted	TAG SYMBOLS	IT s Above control limit
({25 s Insufficient data	x s Determined to be an outlier	= Below control limit
^
-------
12 / 20 CRD-LV Performance Evaluation: Uranium-Radium in Water, 27-Sep-1996
Radium-226
Lab
Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known) Tag
PB
14.1
13.7
14.2
0.26
0.141
14.00
0.29
0.00
PG
12.6
12.9
12.7
0.15
0.084
12.73
-0.75
-1.04
PQ







•
PV
6.5
6.8
6.0=
0.40
0.225
6.43
-5,95
-6.24 x
PW
12.9
14.7
15.1
1.17
0.619
14.23
0.49
0.19
PX
14.7
14.7
14.9
0.12
0.056
14.77
0.93
0.63
Q
16.6
16.7
17.0
0.21
0.113
16.77
2.58
2.28
QJ







»
QM
14.5
14.4
14.5
0.06
0.028
14.47
0.68
0.38
QQ
7.3
7.6
7.8
0.25
0.141
7.57
-5.01
-5.31 U
QU
11.2
10.7
11.7
0.50
0.281
11.20
-2.01
-2.31
QX
16.8
15.8
18.3
1.26
0.703
16.97
2.74
2.45
QY
29.9
30.6
30.9
0.50
0.281
30.43
1385
13.55 x
QZ
13.2
13.3
13.0
0.15
0.084
13.17
-0.39
-0.69
R
10.9
11.5
10.1
0.70
0.394
10.83
-2.32
-2.61
RD
13.4
13.0
13.9
0.45
0.253
13.43
-0.17
-0.47
RF








RG







>
RK







*
RP








RR







•
RX
4.6
5.6
5.5
0.55
0.2S1
5.23
-6.94
-7.23 x
RZ
15.1
15.2
15.5
0.21
0.113
15.27
1.34
1.04
S
14.5
15.5
15.0
0.50
0.281
15.00
1.12
0.82
sc
13.8
13.4
12.5
0.67
0.366
13.23
-0.34
-0.63
SD
11.6
13.2
13.0
0.87
0.450
12.60
-0.86
-1.15
SF
13.2
13.5
13.7
0.25
0.141
13.47
-0.15
-0.44
SI
15.8
14.7
17.3
1.31
0.731
15.93
1.89
1.59
SL








SM
15.1
15.0
15.2
0.10
0.056
15.10
1.20
0.91
SO








ss
12.1
13.2
12.7
0.55
0.309
12.67
-0.81
-1.10
sx







•
sz
14.8
13.9
11.9
1.48
0.816
13.53
-0.09
-0.38
T







•
TD







•
TH







*
TL







•
TN
12.3
12.0
12.2
0.15
0.084
12.17
-1.22
-1.51
TQ
15.2
14.9
18.0
1.71
0.872
16.03
1.97
1.68
TS
13.2
12.6
12.7
0.32
0.169
12.83
-0.67
-0.96
U
12.1
12.4
12.3
0.15
0.084
12.27
-1.13
-1.43
UE
14.7
13.9
14.9
0.53
0.281
14.50
0.71
0.41
UN
13.3
9.2
13.2
2.34
1.292
11.90
-1.44
-1.73
UP
13.2
13.3
13.9
0.38
0.197
13.47
-0.15
-0.44
• =
No data submitted

TAG SYMBOLS

IT a Above control limit
0 = Insufficient data	x a Determined to be an outlier	U 3 Below control limit
v-	¦	i
-------
CRD-LV Performance Evaluation: Uranium-Radium in Water, 27-Sep-1996 13/
20
Radium-226
Lab
Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Ayerage
Normalized deviation
(grand-avg) (known) Tag
UQ
13.8
13.9
13.9
0.06
0.028
13.87
0.18
-0.11

UZ







*
VA
15.3
19.3
17.6
2.01
1.238
17.40
3.10
2.80

VH
14.1
15.6
16.0
1.00
0.534
15.23
1.31
1.02

VI
15.1
14.2
16.5
1.16
0.647
15.27
1.34
1.04

W







•
WC
6.5
1.6
4.5
2.46
1.720
420
-7<79
-8.00
X
WG






*
WH
9.5
12.9
11.4
1.70
0.956
11.27
-1.96
-2.25

WI









WJ








.«
WO
10.9
11.3
8.6
1.46
0.759
10.27
-2.78
-3.08

WR









WS








•
WV








•
WX








•'
wx








•
X
11.4
12.0
12.6
0.60
0.338
12.00
-1.35
-1.65

XA
15.7
17.7
16.1
1.06
0.563
16.50
2.36
2.06

Data sorted by Laboratory Average
Average
Tag
Lab
Average
Tag
Lab
Average
Tag
Lab
4.20
X
WC
12.27

U
13.40

AF
4.90
X
cc
12.30

HL
13.43

RD
5.23
X
RX
12.47

BN
13.47

UP
6.43
X
PV
12.60

SD
13.47

SF
7.57
U
QQ
12.63

AZ
13.47

MX
8.63
Jl
M
12.67

ss
13.47

AL
9.50
4
OF
12.67

FN
13.50

EO
9.57
U
I
12.70

CE
13.53

sz
10.27
U
WO
12.73

PG
13.60

CA
10.80

A
12.73

BH
13.63

BC
10.83

R
12.83

TS
13.70

HK
11.00

BA
12.87

DT
13.73

OX
11.13

E
12.97

K
13.73

AW
11.20

QU
13.17

QZ
13.87

UQ
11.27

WH
13.20

EL
13.90

N
11.40

DB
13.20

DZ
14.00

PB
11.90

UN
13.20

NH
14.00

CJ
11.93

AP
13.23

sc
14.10

GQ
12.00

X
13.27

L
14.17

NT
12.00

EP
13.30

KH
14.23

PW
12.17

TN
13.30

EB
14.23

O
12.20

AE
13.30

BM
14.23

CG
12.23

C
13.37

BK
14.37

GN
• s No data submitted
0 3 Insufficient data

TAG SYMBOLS
x s Determined to be an outlier
IT
4
s Above control limit
s Below control limit
-------
14 / 20 CRD-LV Performance Evaluation: Uranium-Radium in Water, 27-Sep-1996
Radium-226
Data sorted by Laboratory Average
Average Tag
Lab
Average
Tag Lab
Average
Tag
Lab
14.40
BO
15.00
JG
16.07

HP
14.43
JS
15.03
FZ
16.23

LZ
14.47
QM
15.10
SM
16.50

XA
14.50
UE
15.23
VH
16.77

Q
14.50
JX
15.27
VI
16.97

QX
14.57
OB
15.27
RZ
17.40

VA
14.63
NO
15.80
ID
17.83
ft
LT
14.77
PX
15.80
DE
19.37
ft
P
14.80
NJ
15.87
AK
19.53
ft
KL
14.83
CS
15.93
SI
20.67
X
AJ
15.00
s
16.03
TQ
30.43
X
QY
% responding labs

Frequency distribution



10-
0-ua-r-
-6
% responding labs
-2	0	+2
Normalized deviation of the mean from the known value
Frequency distribution
10-
f-	¦¦ "t—-1
-2	o	+2
-6
-4	-2	0	+2	+4
Normalized deviation of the mean from the grand average
+6
• a No data submitted	TAG SYMBOLS	IT s Above control limit
0 = Insufficient dnt-fl	x = Determined to be an outlier	^ — Below control limit
-------
CRD-LV Performance Evaluation: Uranium-Radium in Water, 27-Sep-1996
15/20
Radium-228	Statistical Summary	154 Participants
The known value of this nuclide is 4.7 pCi/1 with an expected precision of 1.2; the control limits
are 2.6 to 6.8; the warning regions are 2.6 to 3.3 and 6.1 to 6.8
62(40.3 %) Failed to respond
6(3.9 %) Outliers
6(3.9 %) Out of control
but not an outlier
Statistic
. 68(44.2 %) Within all limits
Respondents
12(7.8 %) In warning rone
but within control
Non-outliers
Mean
5.55
Grand Avg 4.92
Std. Dev.
3.46
1.13
Variance
11.96
1.28
% Coef. ofVar.
62.29
23.01
% deviation of mean from known value
18.12
4.61
Norm. dev. of mean from known value
0.25
0.19
Median
5.03
4.97
% deviation of median from known value
7.09
5.67
Norm. dev. of median from known value
0.10
0.24
12(13.0 %) More than 3 norm. S.D. •»
12(13.0 %) Between 2 and 3 norm. S.D.*
,36(39.1 %) Within 1 norm. S.D.
of known value
•32(34.8 %) Between 1 and 2 norm. S.D.
-------
16 / 20 CRD-LV Performance Evaluation: Uranium-Radium in Water, 27-Sep-1996
Radium-228
Lab Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known) Tag
A
4.6
4.9
4.6
0.17
0.148
4.70
-0.31
0.00

AE
3.6
3.8
3.6
0.12
0.098
3.67
-1.80
-1.49

AF
5.5
5.6
5.7
0.10
0.098
5.60
0.99
1.30

AH









AJ
3.2
2.2
2.5
0.51
0.492
2.63
-3.30
-2.98

AK
5.2
4.7
5.2
0.29
0.246
5.03
0.17
0.48

AL
4.0
4.6
3.4
0.60
0.591
4.00
-1.32
-1.01

AP
3.4
3.5
3.6
0.10
0.098
3.50
-2.04
-1.73

AR








•-
AU








•
AW
6.1
6.2
6.1
0.06
0.049
6.13
1.76
2.07

AZ
4.2
4.9
4.2
0.40
0.345
4.43
-0.70
-0.38

BA
4.3
3.1
3.1
0.69
0.591
3.50
-2.04
-1.73

BB








•
BC
5.3
5.5
5.5
0.12
0.098
5.43
0.75
1.06

BO








•
BH
5.8
4.8
5.9
0.61
0.541
5.50
0.84
1.15

BK
4.8
4.5
4.7
0.15
0.148
4.67
-0.36
-0.05

BM
4.6
4.7
5.1
0.26
0.246
4.80
-0.17
0.14

BN








•
BO
5.3
3.0
3.1
1.30
1.252
3.80
-1.61
-1.30

C
5.2
4.9
5.0
0.15
0.148
5.03
0.17
0.48

CA
5.0
5.7
5.5
0.36
0.345
5.40
0.70
1.01

CC
5.8
6.0
5.9
0.10
0.098
5.90
1.42
1.73

CE
6.3
8.8
6.0
1.54
1.720
7.03
3.06
3.37
ir
CG
4.3
3.1
3.4
0.62
0.591
3.60
-1.90
-1.59

CJ
6.7
R 7
fi 2
n.fin
0.492
6.20
1.85
2.17

CM








#
CS
5.6
6.2
5.3
0.46
0.443
5.70
1.13
1.44

CX








•
D








.9
DB
4.8
4.9
4.6
0.15
0.148
4.77
-0.22
0.10

DE
5.3
5.3
5.4
0.06
0.049
5.33
0.60
0.91

DI








m
DO









DR








•
DT
4.5
4.6
4.7
0.10
0.098
4.60
-0.46
-0.14

DZ
4.4
4.7
4.4
0.17
0.148
4.50
-0.60
-0.29

E








•
EB
4.0
4.3
4.5
0.25
0.246
4.27
-0.94
-0.63

EL
6.3
6.5
5.9
0.31
0.295
6.23
1.90
2.21

EO
3.3
3.3
3.3
0.00
0.000
3.30
-2.33
-2.02

EP
4.4
4.1
4.0
0.21
0.197
4.17
-1.08
-0.77

ER








•
FE








•
• =
No data submitted

TAG SYMBOLS

ft s Above control limit
0 s Insufficient data	x = Determined to be an outlier	— Below control limit
-------
CRD-LV Performance Evaluation: Uranium-Radium in Water, 27-Sep-1996 17 / 20
Radium-228
Lab Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known) Tag
FJ








FN 3.0
3.1
3.1
0.06
0.049
3.07
-2.67
-2.36

FZ 5.1
5.5
5.8
0.35
0.345
5.47
0.79
1.11

GN 12.2
12.8
12.0
0,42
0.394
12.33°
10,71
11.02
X-
GQ 2.1
2.2
2.2
0.06
0.049
2.17
-3.97
-3.66

HK 4.8
5.1
4.9
0.15
0.148
4.93
0.02
0.34

HL 3.6
3.6
3.6
0.00
0.000
3.60
-1.90
-1.59

HP 5.1
3.6
3.2
1.00
0.935
3.97
-1.37
-1.06

I 4.3
5.0
6.3
1.01
0.984
5.20
0.41
0.72

ID 4.3
j
4.5
4.3
0.12
0.098
4.37
-0.79
-0.48

V ¦
JE







•
JG 5.3
5.7
4.7
0.50
0.492
5.23
0.46
0.77

JIT







•
JN








JP








JS 6.2
5.3
4.2
1.00
0.984
5.23
0.46
0.77

JX 2.8
2.5
2.8
0.17
0.148
2.70
-3.20
-2.89

JY 5.8
3.7
3.4
1.31
1.345
4.30
-0.89
-0.58

K 7.6
5.9
6.7
0.85
0.837
6.73
2.62
2.93

KH 4.3
4.1
4.8
0.36
0.345
4.40
-0.75
-0.43

KL 6.1
6.6
6.8
0.36
0.345
6.50
2.29
2.60

KT








L 5.1
4.8
5.2
0.21
0.197
5.03
0.17
0.48

LF








LH








LT 4.4
2.4
3.6
1.01
0.984
3.47
-2.09
-1.78

LZ







•
M 5.8
4.8
5.8
0.58
0.492
5.47
0.79
1.11

MX 5.1
3.7
5.5
0.95
0.886
4.77
-0.22
0.10

N 5.5
6.1
5.1
0.50
0.492
5.57
0.94
1.25

NA.







•
NH 4.1
3.7
4.3
0.31
0.295
4.03
-1.27
-0.96

NJ 6.0
5.1
7.0
0.95
0.935
6.03
1.61
1.92

NK







*
NO 3.2
4.4
4.7
0.79
0.738
4.10
-1.18
-0.87

NT 3.9
3.9
4.0
0.06
0.049
3.93
-1.42
-1.11

O 3.8
2.8
3.3
0.50
0.492
3.30
-2.33
-2.02

OB








OF 6.1
6.0
4.1
1.13
0.984
5.40
0.70
1.01

OM







*
OS







•
OX 4.3
4.2
4.1
0.10
0.098
4.20
-1.03
-0.72

OY







i
P 3.4
2.4
3.2
0.53
0.492
3.00
-2.77
-2.45

• = No data submitted	TAG SYMBOLS	1T = Above control limit
0 = Insufficient data	x s Determined to be an outlier	1L s Below control limit
-------

18 / 20 CRD-LV Performance Evaluation: Uranium-Radium in Water, 27-Sep-1996
Radium-228
Lab
Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known) Tag
PB
46
4.7
4;8
0.10
0.098
4.70
-0.31
0.00

PG








•<
PQ








• •
FV
8;7
-¦9.O.-
10.1
0.74
0.689
9.27
6i28
6.59
x'V
PW
4.9
4.8
4.7
0.10
0.098
4.80
-0.17
0.14

PX








•
Q
5.5
6.3
5.8
0.40
0.394
5.87
1.37
1.68

QJ









QM









QQ








•"i
QU
9;3
10.5
8;1-
1.20
1.345
9 30
6.33
6.64
- X
QX
6.9
9.1
7.3
117
1.158
7.77
4.11
4.43
it
QY









QZ
4.3
3.8
4.1
0.25
0.246
4.07
-1.23
-0.91

R








•
RD
5.3
6.0
5.1
0.47
0.443
5.47
0.79
1.11

Rtf








•
RG









RK









RP








' * ¦
RR








• ¦
RX
5.3
5.9
6.4
0.55
0.541
5.87
1.37
1.68

RZ
5.3
4.7
5.0
0.30
0.295
5.00
0.12
0.43

S
5.3
5.1
4.9
0.20
0.197
5.10
0.26
0.58

sc
4.6
4.2
4.6
0.23
0.197
4.47
-0.65
-0.34

SD
5.8
5.1
6.2
0.56
0.541
5.70
1.13
1.44

SF
5.0
7.6
8.6
1.86
2.470
7.07
3.10
3.42
tr
SI
3.2
3.8
4.2
0.50
0.492
3.73
-1.71
-1.40

SL









SM
4.1
4.8
5.0
0.47
0.443
4.63
-0.41
-0.10

SO








•
ss
5.7
4.6
5.9
0.70
0.640
5.40
0.70
1.01

sx








•>
sz
5.4
5.1
5.9
0.40
0.394
5.47
0.79
111

T









TD









TH








•
TL








' A. <:
TN
4.8
3.5
4.7
0.72
0.640
4.33
-0.84
-0.53

TQ
4.7
5.0
6.1
0.74
0.689
5.27
0.51
0.82

TS
5.8
5.9
5.3
0.32
0.295
5.67
1.08
1.40

U
4.4
4.7
4.7
0.17
0.148
4.60
-0.46
-0.14

UE-
3,7
13.9
14.9
6.20
9.596
10.83
8;64
8.85

UN
4.4
4.5
6.1
0.95
0.837
5.00
0.12
0.43

UP
6.3
5.4
6.5
0.59
0.541
6.07
1.66
1.97

• =
No data submitted

TAG SYMBOLS

1T = Above control limit
0 = Insufficient data	x s Determined to be an outlier	^ = Below control limit
.	—y
-------
((	
CRD-LV Performance Evaluation: Uranium-Radium in Water, 27-Sep-1996 19 / 20
Radium-228









>
Lab




Exper.
Rng anal


Normalized deviation

Kes. i Kes. 2
Res. 3
Sigma
(R + SR)
Average
(grand-avg) (known) Tag
UQ
5.9
5.4

6.0
0.32
0.295
5.77
1.23
1.54

UZ








• '
VA
342
38.3:
28.8
4.76
8.002
33=77
4L64
41.95
X
VH
6.6
9.0

7.7
1.20
1.345

7.77
4.11
4.43
It
VI
6.5
5.5

7.0
0.76
0.738

6.33
2.04
2.36

W









• •
WC
9.5
7.6

4.3
2.63
3.971

7.13
3.20
3.51
IT	
WO










•
WH
4.5
3.9

4.5
0.35
0.295
4.30
-0.89
-0.58

1 Wit









•
WJ











wo
6.0
6.0

5.7
0.17
0.148
5.90
1.42
1.73

WR










•
WS










„ •
WV










• .
wx










':V!-
WT£










*%•» ^
X-L;
10>4
IS#
13.1
L7S
2.189
12.40
10.80

v
XA










T '• •



Data sorted by Laboratory Averaj
fe



Average
Tag

Lab
Average
Tag
Lab
Average
Tag
Lab
2.17


GQ

4.27

EB

5.03

C
2.63


AJ

4.30

WH

5.03

AK
2.70


JX

4.30

JY

5.10

S
3.00


P

4.33

TN

5.20

I
3.07


FN

4.37

ID

5.23

JS
3.30


O

4.40

KH

5.23

JG
3.30


EO

4.43

AZ

5.27

TQ
3.47


LT

4.47

SC

5.33

DE
3.50


BA

4.50

DZ

5.40

SS
3.50


AP

4.60

U

5.40

OF
3.60


HL

4.60

DT

5.40

CA
3.60


CG

4.63

SM

5.43

BC
3.67


AE

4.67

BK

5.47

SZ
3.73


SI

4.70

PB

5.47

KD
3.80


BO

4.70

A

5.47

FZ
3.93


NT

4.77

MX

5.47

M
3.97


HP

4.77

DB

5.50

BH
4.00


AL

4.80

BM

5.57

N
4.03


NH

4.80

PW

5.60

AF
4.07


QZ

4.93

HK

5.67

TS
4.10


NO

5.00

UN

5.70

SD
4.17


EP

5.00

RZ

5.70

CS
4.20


OX

5.03

L

5.77

UQ
• s No data submitted


TAG SYMBOLS


It a Above control limit
[09 Insufficient data

X 3
Determined to be an outlier

¦II s Below control limit
	V
-------
20 / 20 CRD-LV Performance Evaluation: Uranium-Radium in Water, 27-Sep-1996
Radium-228
Data sorted by Laboratory Average
Average
Tag
Lab
Average
Tag
Lab
Average
Tag
Lab
5.87

RX
6.20

CJ
7.77
ft
VH
5.87

Q
6.23

EL
7.77
ft
QX
5.90

wo
6.33

VI
9.27
X
PV
5.90

cc
6.50

KL
9.30
X
QU
6.03

NJ
6.73

K
10.83
X
UE
6.07

UP
7.03
IT
CE
12.33
X
GN
6.13

AW
7.07
ft
SF
12.40
X
X



7.13
ft
wc
33.77
X
VA
10
responding labs
Frequency distribution

-6
-4	-2	0	+2	+4
Normalized deviation of the mean from the known value
-r"
+6
% responding labs		Frequency distribution

-6	-4	-2	0+2+4	+6
Normalized deviation of the mean from the grand average
• s No data submitted	TAG SYMBOLS	ft = Above control limit
Ci = Insufficient, dnt.a	x s Determined to be an outlier	W s Below control limit .
-------
United States	Office of Research and	EPA/600/R-96/139
Environmental Protection Development .	December 1996
Agency	Washington, DC 20460
Iodine in Water
Performance Evaluation
Study
A Statistical Evaluation of
the October 4, 1996 Data
023RSL96.COV-139
-------
Iodine in Water
Performance Evaluation Study
October 4, 1996
Environmental Protection Agency
National Exposure Research Laboratory
Characterization Research Division
Las Vegas, Nevada
-------
UNITED STATES ENVIRONMENTAL PROTECTION AGENCY
OFFICE OF RESEARCH AND DEVELOPMENT
NATIONAL EXPOSURE RESEARCH LABORATORY
CHARACTERIZATION RESEARCH DIVISION-LAS VEGAS
P.O. BOX 93478
LAS VEGAS, NEVADA 89193-3478
(702/798-2100)
Dear Participant,
Enclosed are the results of the Analytical Sciences Branch (CRD-LV)
Performance Evaluation Study for Iodine in Water; October 4, 1996.
The known value for each analysis was determined by gravimetric methods,
checked by chemical analyses performed by CRD-LV's Radiochemistry Laboratory,
and compared to the participating laboratories' grand average.
The expected precision, determined by the known value, was taken from
'Table 3. Laboratory Precision: One Standard Deviation Values and Control Limits
for Various Analyses", which is based on data accumulated over the years by the
Performance Evaluation Program, and can be found in the Environmental Radioactivity
Performance Evaluation Studies Program and Radioactive Standards Distribution
Program information brochure.
Please take a few minutes to review this report and the analytical data your
laboratory submitted to us. If there are any apparent discrepancies, please notify us
immediately.
We encourage you to make use of the computer-automated data-entry system
that has been in place for some time now. As the number of participants increases,
and it becomes unrealistic for us to receive results by mail or FAX, the computer
system will be our only avenue for accepting data.
If you have any questions or comments, please send a message via the data-entry
system or contact Stephen Pia at 702/798-2102 or Patricia Honsa at 702/798-2141.
Sincerely, /I
jfcfL. ft
Stephen Pia
Team Leader
RADQA Program
Enclosure
-------
NOTICE
This material has been funded wholly by
the U.S. Environmental Protection Agency.
It has been subjected to the Agency's review,
and has been approved for publication as
an EPA document.
-------
CRD-LV Performance Evaluation: Iodine in Water, 4-Oct-1996	1/7
The following pages consist of separate sections for each of the nuclides in this study with four
parts per section. After the first, each part is separated from the next by a new page or a thick
horizontal bar. The first page of each section is a statistical summary for the nuclide and starts
with a statement of the known value, the control limits, and the warning limits.
The warning limits are placed at two normalized standard deviations above and below the
known value and the control limits are three normalized standard deviations above and below
the known value. If you keep control charts, these values will be useful for anticipating problems
with the accuracy of your analytical methods.
The coin shaped pie chart at the top of the summary page shows the fate of all the samples
sent out in number and percentage terms. The pie chart starts at the top and rotates clockwise.
The first sector represents those participants who submitted analytical results within both the
warning and control limits. The next sector represents those who are in the warning region but
not out of control. The third sector represents those who are out of control, but have passed
the outlier test. The fourth sector represents those who have failed the outlier test. The last
sector represents those participants who have failed to respond properly. This is the case if no
analytical results were returned, or less than three determinations were reported, or if the results
were received too late. The reeding on the edge of the coin is spaced at one percent intervals, and
the sector shading becomes darker as the data reliability decreases. Sectors with zero width are
not shown.
The table in the center shows a number of statistical quantities calculated from the submitted
data based on the mean and median values in relation to the known value, both before and after
outlier removal. The lower pie chart uses the same construction as the upper chart and shows
the distribution of properly submitted data in terms of deviation from the known value divided
into sectors representing one, two, three, and greater than three normalized standard deviations.
The second part is an alphabetical listing, in lab-code order, of submitted data and several
calculated quantities. An entry that is shaded has been rejected because of one of the reasons
listed above or failure of the outlier test. The fifth and sixth columns are a measure of laboratory
precision. The Range analysis is a normalized value that you may use to keep precision control
charts. The eighth and ninth columns are the differences from the mean of all non-outliers and
from the known value, respectively. If this value is between 2.0 and 3.0, your analytical process
precision is in the warning zone; if it exceeds 3.0 it is out of control. A tag symbol may appear in
the last column. Each page with tags has a symbol definition summary at the bottom. If there is
no tag symbol, the data is within the control limits, but it may be in the warning zone.
The third part is a three-column listing of result average, tag symbol, and lab-code in average
order excluding those labs not responding properly. In this order, all outliers and out-of-control
results appear at the top or bottom of the list.
The last part is two bar chart displays showing frequency distributions of responding
participants. The first chart places the known value at the center and a bar at each 0.2 unit of
expected precision. The second chart places the mean of the reported measurements at the center
and a bar at each 0.2 unit of standard deviation. In both cases, a bar includes those results within
0.1 unit up to the maximum of six. Any results more than six units from the center value are
shown cumulatively by a shaded bar one past the sixth unit. If the central tendency of the known
value distribution falls away from the center, an error in accuracy is indicated. If the distribution
is broad, poor precision is indicated. The mean value distribution is similar but uses the average
and standard deviation of reported results as its basis.
-------
Ill
v
CRD-LV Performance Evaluation: Iodine in Water, 4-Oct-1996
The Range Analysis(R + SR) is calculated from the range, mean range and standard error of
the range values. The range is the difference between the maximum and minimum results for the
laboratory. The mean range is calculated by multiplying the expected precision by 1.693(for three
results). The standard error of the range is calculated by multiplying the mean range by 2.575(for
three results), subtracting the mean range from this product, and dividing the result by 3. If the
range is greater than the mean range, then the range analysis is calculated by subtracting the
mean range from the range, dividing the result by the standard error of the range and adding 1.
If the mean range is greater than or equal to the range, then the range analysis is calculated by
dividing the range by the mean range.
The normalized deviation of the mean from the grand average is calculated from the deviation
of the mean from the grand average and the standard error of the mean values. The deviation of
the mean from the grand average is calculated by subtracting the grand average from the
average of the laboratory's three results. The standard error of the mean is calculated by
dividing the expected precision by the square root of 3(the number of results). The normalized
deviation of the mean from the grand average is calculated by dividing the deviation of the mean
from the grand average by the standard error of the mean.
The normalized deviation of the mean from the known value is calculated from the deviation of
the mean from the known value and the standard error of the mean values. The deviation of the
mean from the known value is calculated by subtracting the known value from the average of the
laboratory's three results. The standard error of the mean is calculated by dividing the expected
precision by the square root of 3(the number of results). The normalized deviation of the mean
from the known value is calculated by dividing the deviation of the mean from the known value by
the standard error of the mean.
A complete explanation of the statistical calculations involved in the report may be found in
the Environmental Radioactivity Performance Evaluation Studies Program information brochure
[Draft Revision of EPA-600/4-81-004], available from Patricia Honsa, CRD-LV, 702/798-2141.
-------
CRD-LV Performance Evaluation: Iodine in Water, 4-Oct-1996
3/7
Iodine-131	Statistical Summary	105 Participants
The known value of this nuclide is 27.0 pCi/l with an expected precision of 6.0; the control limits
are 16.6 to 37.4; the warning regions are 16.6 to 20.1 and 33.9 to 37.4
17(16.2 %) Failed to respond ».
; 79(75.2 %) Within all limits
v	¦¦¦•	>s / <•>
*	\l\
*	x rs.
*	nJ K
$ NJ
* %J tn.
0 ^sJ tv.

5(4.8 %) In warning zone
4(3.8 %) Outliers '
|
-mn
but within control
Statistic
Respondents
Non-outliers
Mean
28.36
Grand Avg 27.61
Std. Dev.
4.94
3.08
Variance
24.42
9.51
%Coef. ofVar.
17.42
11.17
% deviation of mean from known value
5.05
2.25
Norm. dev. of mean from known value
0.28
0.20
Median
27.67
27.67
% deviation of median from known value
2.47
2.47
Norm. dev. of median from known value
0.13
0.22
4(4.5 %) More than 3 norm. S.D.
5(5.7 %) Between 2 and 3 norm. S.D
; 67(76.1 %) Within 1 norm. S.D.
a
of known value
12(13.6 %) Between 1 and 2 norm. S.D.
-------
All
V

CRD-LV Performance Evaluation: Iodine in Water,
4-Oct-1996

Iodine-131







Lab
Res. 1


Exper.
Rng anal

Normalized deviation
Res. 2
Res. 3
Sigma
(R + SR)
Average
(grand-avg)
(known) Tag
A
20.0
23.0
22.0
1.53
0.295
21.67
-1.71
-1.54
AF
29.0
32.0
25.0
3.51
0.689
28.67
0.31
0.48
AJ
27.0
25.0
29.0
2.00
0.394
27.00
-0.18
0.00
AK
32.0
31.0
32.0
0.58
0.098
31.67
1.17
1.35
AL
24.0
27.0
26.0
1.53
0.295
25.67
-0.56
-0.38
AP
27.0
27.0
30.0
1.73
0.295
28.00
0.11
0.29
AU
27.0
25.0
26.0
1.00
0.197
26.00
-0.46
-0.29
AW
29.0
28.0
27.0
1.00
0.197
28.00
0.11
0.29
AY
29.0
28.0
27.0
1.00
0.197
28.00
0.11
0.29
AZ
22.0
22.0
22.0
0.00
0.000
22.00
-1.62
-1.44
BA
30.0
29.0
29.0
0.58
0.098
29.33
0.50
0.67
BC
26.0
27.0
23.0
2.08
0.394
25.33
-0.66
-0.48
BH
27.0
28.0
30.0
1.53
0.295
28.33
0.21
0.38
BL
24.0
25.0
25.0
0.58
0.098
24.67
-0.85
-0.67
BM
26.0
27.0
27.0
0.58
0.098
26.67
-0.27
-0.10
BO
29.0
30.0
28.0
1.00
0.197
29.00
0.40
0.58
C
29.0
28.0
28.0
0.58
0.098
28.33
0.21
0.38
CA
28.0
28.0
24.0
2.31
0.394
26.67
-0.27
-0.10
CE
30.0
25.0
28.0
2.52
0.492
27.67
0.02
0.19
CJ
25.0
25.0
29.0
2.31
0.394
26.33
-0.37
-0.19
CS
24.0
30.0
28.0
3.06
0.591
27.33
-0.08
0.10
CX
28.0
26.0
25.0
1.53
0.295
26.33
-0.37
-0.19
D
27.0
26.0
26.0
0.58
0.098
26.33
-0.37
-0.19
DD
27.0
26.0
30.0
2.08
0.394
27.67
0.02
0.19
DE
26.0
26.0
27.0
0.58
0.098
26.33
-0.37
-0.19
DR
28.0
26.0
19.0
4.73
0.886
24.33
-0.95
-0.77
DT
27.0
25.0
28.0
1.53
0.295
26.67
-0.27
-0.10
DY








E
27.0
26.0
28.0
1.00
0.197
27.00
-0.18
0.00
EB
28.0
27.0
28.0
0.58
0.098
27.67
0.02
0.19
EH
28.0
26.0
26.0
1.15
0.197
26.67
-0.27
-0.10
EL
31.0
27.0
28.0
2.08
0.394
28.67
0.31
0.48
EX
21.0
22.0
22.0
0.58
0.098
21.67
-1.71
-1.54
FE
31.0
21.0
26.0
5.00
0.984
26.00
-0.46
-0.29
FL
29.0
30.0
28.0
1.00
0.197
29.00
0.40
0.58
GT







•
HK
25.0
28.0
29.0
2.08
0.394
27.33
-0.08
0.10
HP
29.0
37.0
33.0
4.00
0.788
33.00
1.56
1.73
HX
26.0
26.0
24.0
1.15
0.197
25.33
-0.66
-0.48
I
27.0
26.0
28.0
1.00
0.197
27.00
-0.18
0.00
IA
33.0
39.0
36.0
3.00
0.591
36.00
2.42
2.60
IU
42.0
38:0
36.0
3;06
0.591
38,67
3.19
3.37 x
J
26.0
26.0
26.0
0.00
0.000
26.00
0.46
-0.29
JR







*
JS
24.0
23.0
27.0
2.08
0.394
24.67
0.85
-0.67
• = No data submitted

TAG SYMBOLS

IT = Above control limit
[0s Insufficient data
x s
Determined to be an outlier
J)- s Below control limit
-------
CRD-LVPerformance Evaluation: Iodine in Water, 4-Oct-1996	5/7
Iodine-131
Lab
Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known) Tag
'
4o.a
40i0
40.0
aoa
-jQjQOO,
40.00:
3;58
3.75 x
K
26.0
25.0
25.0
0.58
0.098
25.33
-0.66
-0.48
KL
30.0
28.0
29.0
l.QO
0.197
29.00
0,40
0.58
KM
27.0
27.0
24.0
1.73
0.295
26.00
-0.46
-0.29
KX
28.0
28.0
28.0
0.00
0.000
28.00
0.11
0.29
L
28.0
26.0
26.0
1.15
0.197
26.67
-0.27
-0.10
LF
32.0
29.0
35.0
3.00
0.591
32.00
1.27
1.44
LR
53i0
MM
m
5.13
0.984
58.67
897
9.14 x
L.T







m.
M
25.0
28.0
29.0
2.08
0.394
27.33
-0.08
0.10
MN
21.0
22.0
26.0
2.65
0.492
23.00
-1.33
-1.15
MP
16.0
24.0
20.0
4.00
0.788
20.00
-2.20
-2.02
MV
29.0
27.0
24.0
2.52
0.492
26.67
-0.27
-0.10
N
29.0
27.0
27.0
1.15
0.197
27.67
0.02
0.19
NH
34.0
29.0
37.0
4.04
0.788
33.33
1.65
1.83
NJ
35.0
24.0
27.0
5.69
1.158
28.67
0.31
0.48
NO







«
O
29.0
28.0
28.0
0.58
0.098
28.33
0.21
0.38
OA
28.0
27.0
26.0
1.00
0.197
27.00
-0.18
0.00
OB
31.0
29.0
26.0
2.52
0.492
28.67
0.31
0.48
OT







•
PB
29.0
30.0
29.0
0.58
0.098
29.33
0.50
0.67
PE
27.0
25.0
28.0
1.53
0.295
26.67
-0.27
-0.10
PV
29.0
33.0
26.0
3.51
0.689
29.33
0.50
0.67
PW
23.0
36.0
29.0
6.51
1.533
29.33
0.50
0.67
Q
30.0
31.0
29.0
1.00
0.197
30.00
0.69
0.87
QJ







•
QX
25.0
28.0
30.0
2.52
0.492
27.67
0.02
0.19
QY
35.0
29.0
35.0
3.46
0.591
33.00
1.56
1.73
QZ
39.0
35.0
37.0
2.00
0.394
37.00
2.71
2.89
R
27.0
29.0
27.0
1.15
0.197
27.67
0.02
0.19
RK







•
S
22.0
22.0
26.0
2.31
0.394
23.33
-1.23
-1.06
-SF








SM
27.0
32.0
29.0
2.52
0.492
29.33
0.50
0.67
ss
26.0
29.0
25.0
2.08
0.394
26.67
-0.27
-0.10
sv
33.0
27.0
30.0
3.00
0.591
30.00
0.69
0.87
sz
24.0
29.0
31.0
3.61
0.689
28.00
0.11
0.29
TA
27.0
22.0
25.0
2.52
0.492
24.67
-0.85
-0.67
TC
38.0
43.0
38.0
2.89
,0:492
39.67
3*48
3.66 x
TD
34.0
32.0
36.0
2.00
0.394
34.00
1.85
2.02
TH







«
TL







«
TQ
29.0
28.0
35.0
3.79
0.689
30.67
0.88
1.06
U
27.0
27.0
29.0
1.15
0.197
27.67
0.02
0.19
• = No data submitted TAG SYMBOLS II = Above control limit
0 s Insufficient data	x = Determined to be an outlier	II = Below control limit
-------
(,	










——^
6/7

CRD-LV Performance Evaluation: Iodine in Water,
4-Oct-1996

Iodine-131









-v
Lab
Res. 1


Exper.
Rng anal


Normalized deviation

Res. 2
Res. 3 Sigma
(R + SR)
Average
(grand-avg) (known) Tag
UC
17.0
19.0
17.0 1.15
0.197
17.67

-2.87
-2.69

UE
23.0
27.0
25.0 2.00
0.394
25.00

-0.75
-0.58

ui










•
UN
32.0
30.0
29.0 1.53
0.295
30.33

0.79
0.96

UP
29.0
30.0
30.0 0.58
0.098
29.67

0.59
0.77

VA
32.0
31.0
31.0 0.58
0.098
31.33

1.08
1.25

VC










•
VM
24.0
34.0
28.0 5.03
0.S84
28.67

0.31
0.48

VN
30.0
28.0
28.0 1.15
0.197
28.67

0.31
0.48

W










•
WM










•
WO










•
WY










ft
X
26.0
30.0
28.0 2.00
0.394
28.00

0.11
0.29

Y
28.0
28.0
27.0 0.58
0.098
27.67 0.02
0.19



Data sorted by Laboratory Average

Average

Tag
Lab
Average
Tag
Lab
Average

Tag
Lab
17.67


UC
26.67

L

28.33


C
20.00


MP
26.67

EH

28.33


BH
21.67


EX
26.67

DT

28.67


VN
21.67


A
26.67

CA

28.67


VM
22.00


AZ
26.67

BM

28.67


OB
23.00


MN
27.00

OA

28.67


NJ
23.33


S
27.00

I

28.67


EL
24.33


DR
27.00

E

28.67


AF
24.67


TA
27.00

AJ

29.00


KL
24.67


JS
27.33

M

29.00


FL
24.67


BL
27.33

HK

29.00


BO
25.00


UE
27.33

CS

29.33


SM
25.33


K
27.67

Y

29.33


PW
25.33


HX
27.67

U

29.33


PV
25.33


BC
27.67

R

29.33


PB
25.67


AL
27.67

QX

29.33


BA
26.00


KM
27.67

N

29.67


UP
26.00


J
27.67

EB

30.00


sv
26.00


FE
27.67

DD

30.00


Q
26.00


AU
27.67

CE

30.33


UN
26.33


DE
28.00

X

30.67


TQ
26.33


D
28.00

sz

31.33


VA
26.33


CX
28.00

KX

31.67


AK
26.33


CJ
28.00

AY

32.00


LF
26.67


ss
28.00

AW

33.00


QY
26.67


PE
28.00

AP

33.00


HP
26.67


MV
28.33

O

33.33


NH
• = No data submitted

TAG SYMBOLS


ft = Above control limit
0 = Insufficient data
^	

x - Determined to be an outlier

11 = Below control limit
-------
CRD-LV Performance Evaluation: Iodine in Water, 4-Oct-1996
7/7
Iodine-131
Data sorted by Laboratory Average
Average
Tag
Lab
Average
Tag-
_ Lab .
-Average -
Tag
Lab
34.00

TD
37.00

QZ
39.67
X
TC
36.00

LA
38.67
X-
IU
. -40.00^
58.67
X
X
jQL
LR
% responding labs
Frequency distribution
10-
-4	-2	0	+2	+4
Normalized deviation of the mean from the known value
% responding labs
Frequency distribution
10-
"T~
•6

"T
-2
Emu
1_JL
+2
—r~
+4
JU
+6
Normalized deviation of the mean from the grand average
• s No data submitted	TAG SYMBOLS	ft = Above control limit
0 = Insufficient data	x s Determined to be an outlier	U = Below control limit
v*	—v
-------
United States
Environmental Protection
Agency
OfKe of Research and
Df.veioD^ent
W?.shing:on, DC 20460
E PA/600/R-97/001A
January 1997
Blind-A Performance
Evaluation Study
A Statistical Evaluation of
the October 15, 1996 Data
002RSL97.COV
-------
Blind-A
Performance Evaluation Study
October 15, 1996
Environmental Protection Agency
National Exposure Research Laboratory
Characterization Research Division
Las Vegas, Nevada
-------
UNITED STATES ENVIRONMENTAL PROTECTION AGENCY
OFFICE OF RESEARCH AND DEVELOPMENT
NATIONAL EXPOSURE RESEARCH LABORATORY
CHARACTERIZATION RESEARCH DIVISION-LAS VEGAS
P.O. BOX 93478
LAS VEGAS, NEVADA 89193-3478
(702/798-2100)
Dear Participant,
Enclosed are the results of the Analytical Sciences Branch (CRD-LV)
Performance Evaluation Study for Bllnd-A; October 15,1996.
The known value for each analysis was determined by gravimetric methods,
checked by chemical analyses performed by CRD-LV's Radiochemistry Laboratory,
and compared to the participating laboratories' grand average.
The expected precision, determined by the known value, was taken from
'Table 3. Laboratory Precision: One Standard Deviation Values and Control Limits
for Various Analyses", which is based on data accumulated over the years by the
Performance Evaluation Program, and can be found in the Environmental Radioactivity
Performance Evaluation Studies Program and Radioactive Standards Distribution
Program information brochure.
Please take a few minutes to review this report and the analytical data your
laboratory submitted to us. If there are any apparent discrepancies, please notify us
immediately.
We encourage you to make use of the computer-automated data-entry system
that has been in place for some time now. As the number of participants increases,
and it becomes unrealistic for us to receive results by mail or FAX, the computer
system will be our only avenue for accepting data.
If you have any questions or comments, please send a message via the data-entry
system or contact Stephen Pla at 702/798-2102 or Patricia Honsa at 702/798-2141.
Stephen Pla
Team Leader
RADQA Program
Enclosure
-------
NOTICE
This material has been funded wholly by
the U.S. Environmental Protection Agency.
It has been subjected to the Agency's review,
and has been approved for publication as
an EPA document.
-------
CRD-LV Performance Evaluation: Blind-A, 15-Oct-199fl
1/30
The following pages consist of separate sections for each of the nuclides in thin study with four
parts per section. After the first, each part is separated from the next by a new page or a thick
horizontal bar. The first page of each section is a statistical summary for the nuclide starts
with a statement of the known value, the control limits, and the warning limits.
The warning limits are placed at two normalized standard deviations above and below the
known value and the control limits are three normalized standard deviations above and below
the known value. If you keep control charts, these values will be useful for anticipating problems
with the accuracy of your analytical methods.
The coin shaped pie chart at the top of the summary page shows the fate of all the samples
sent out in number and percentage terms. The pie chart starts at the top and rotates clockwise.
The first sector represents those participants who submitted analytical results within both the
warning and control limits. The next sector represents those who are in the warning region but
not out of control. The third sector represents those who are out of control, but have passed
the outlier test. The fourth sector represents those who have failed the outlier test. The last
sector represents those participants who have failed to respond properly. This is the case if no
analytical results were returned, or less than three determinations were reported, or if the results
were received too late. The reeding on the edge of the coin iB spaced at one percent intervals, and
the sector shading becomes darker as the data reliability decreases. Sectors with zero width are
not shown.
The table in the center shows a number of statistical quantities calculated from the submitted
data based on the mean and median values in relation to the known value, both before and after
outlier removal. The lower pie chart uses the same construction as the upper chart and shows
the distribution of properly submitted data in terms of deviation from the known value divided
into sectors representing one, two, three, and greater than three normalized standard deviations.
The second part is an alphabetical listing, in lab-code order, of submitted data and several
calculated quantities. An entry that is shaded has been rejected because of one of the reasons
listed above or failure of the outlier test. The fifth and sixth columns are a measure of laboratory
precision. The Range analysis is a normalized value that you may use to keep precision control
charts. The eighth and ninth columns are the differences from the mean of all non-outliers and
from the known value, respectively. If this value is between 2.0 and 3.0, your analytical process
precision is in the warning zone; if it exceeds 3.0 it is out of control. A tag symbol may appear in
the last column. Each page with tags has a symbol definition summary at the bottom. If there is
no tag symbol, the data is within the control limits, but it may be in the warning zone.
The third part is a three-column listing of result average, tag symbol, and lab-code in average
order excluding those labs not responding properly. In this order, all outliers and out-of-control
results appear at the top or bottom of the list.
The last part is two bar chart displays showing frequency distributions of responding
participants. The first chart places the known value at the center and a bar at each 0.2 unit of
expected precision. The second chart places the mean of the reported measurements at the center
and a bar at each 0.2 unit of standard deviation. In both cases, a bar includes those results within
0.1 unit up to the nrmTimnm of six. Any results more than six units £rom the center value are
shown cumulatively by a shaded bar one past the sixth unit. If the central tendency of the known
value distribution falls away from the center, an error in accuracy is indicated. If the distribution
is broad, poor precision is indicated. The mean value distribution is similar but uses the average
and standard deviation of reported results as its basis.
-------
f(
2/30	CRD-LV Performance Evaluation: Blind-A, 15-Oct-1996
The Range AnaIysis(R + SR) is calculated from the range, mean range and standard error of
the range values. The range is the difference between the maximum and minimum remits for the
laboratory. The mean range is calculated by multiplying the expected precision by 1.693(for three
results). The standard error of the range is calculated by multiplying the mean range by 2.575(for
three results), subtracting the mean range from this product, and dividing the result by 3. If the
range is greater than the mean range, then the range analysis is calculated by subtracting the
mean range from the range, dividing the result by the standard error of the range and adding 1.
If the mean range is greater than or equal to the range, then the range analysis is calculated by
dividing the range by the mean range.
The normalized deviation of the mean from the grand average is calculated from the deviation
of the mean from the grand average and the standard error of the mean values. The deviation of
the mean from the grand average is calculated by subtracting the grand average from the
average of the laboratory's three results. The standard error of the mean is calculated by
dividing the expected precision by the square root of 3(the number of results). The normalized
deviation of the mean from the grand average is calculated by dividing the deviation of the mean
from the grand average by the standard error of the mean.
The normalized deviation of the mean from the known value is calculated from the deviation of
the mean from the known value and the standard error of the mean values. The deviation of the
mean from the known value is calculated by subtracting the known value from the average of the
laboratory's three results. The standard error of the mean is calculated by dividing the expected
precision by the square root of 3(the number of results). The normalized deviation of the mean
from the known value is calculated by dividing the deviation of the mean from the known value by
the standard error of the mean.
A complete explanation of the statistical calculations involved in the report may be found in
the Environmental Radioactivity Performance Evaluation Studies Program information brochure
[Draft Revision of EPA-600/4-81-004], available from Patricia Honsa, CRD-LV, 702/798-2141.
-------
CRD-LV Performance Evaluation: Blind-A, 15-Oct-1996
3/30
Gross Alpha	Statistical Summary	179 Participants
The known value of this nuclide is 59.1 pCi/1 with an expected precision of 14.8; the control limits
are 33.4 to 84.8; the warning regions are 33.4 to 42.0 and 76.2 to 84.8
40(22.3 %) Failed to respond \
4(2.2 %) Outliers ' •
5(2.8 %) Out of control *
but not an outlier
Statistic
; 116(64.8 %) Within all limits
Respondents
14(7.8 %) In warning zone
but within control
Non-outliers
Mean
Std. Dev.
Variance
% Coef. of Var.
% deviation of mean from known value
Norm. dev. of mean from known value
Median
% deviation of median from known value
Norm. dev. of median from known value
62.83
27.47
754.39
43.72
6.31
0.14
59.23
0.23
0.00
Grand Avg 59.91
11.14
124.19
18.60
1.37
0.07
59.07
-0.06
0.00
9(6.5 %) More than 3 norm. S.D.
14(10.1 %) Between 2 and 3 norm. S.D.
,89(64.0 %) Within 1 norm. S.D.
of Known value
27(19.4 %) Between 1 and 2 norm. S.D.
-------
ft
4/30
CRD-LV Performance Evaluation: Blind-A, 15-Oct-1996

	^
*
Gross Alpha








Lab
Res. 1
Res. 2

Exper.
Rng anal

Normalized deviation

Res. 3
Sigma
(R + SR)
Average,
(grand-avg)
(known) Tag
A
50.9
57.5
47.3
5.17
0.407
51.90
-0.94
-0.84

AE
44.1
43.2
47.5
2.27
0.172
44.93
-1.75
-1.66

AF
58.1
60.6
59.4
1.25
0.100
59.37
-0.06
0.03

AH
37.8
41.1
43.7
2.96
0.235
40.87
-2.23
-2.13

AJ
71.7
58.4
59.3
7.43
0.531
63.13
0.38
0.47

AK
67.3
70.1
68.3
1.42
0.112
68.57
1.01
1.11

AL
60.9
62.3
62.9
1.03
0.080
62.03
0.25
0.34

AP
58.1
61.7
64.4
3.16
0.251
61.40
0.17
0.27

AR
62.7
61.4
71.5
5.49
0.403
65.20
0.62
0.71

AU
62.0
59.0
65.0
3.00
0.239
62.00
0.24
0.34

AW
52.6
52.7
57.0
2.51
0.176
54.10
-0.68
-0.59

AZ
48.7
49.3
50.6
0.97
0.076
49.53
-1.21
-1.12

BA
61.4
59.8
54.7
3.50
0.267
58.63
-0.15
-0.05

BB
48.0
51.5
49.6
1.75
0.140
49.70
-1.19
-1.10

BC
71.1
70.7
71.4
0.35
0.028
71.07
1.31
1.40

BG
74.0
74.0
54.0
11.55
0.798
67.33
0.87
0.96

BH
52.1
51.3
54.2
1.50
0.116
52.53
-0.86
-0.77

BK
58.0
56.0
56.0
1.15
0.080
56.67
-0.38
-0.28

BL








•
BM
62.4
61.3
62.5
0.67
0.048
62.07
0.25
0.35

BN









BO
60.7
54.2
63.9
4.94
0.387
59.60
-0.04
0.06

BS
67.9
69.3
68.8
0.71
0.056
68.67
1.02
1.12

BW








•
C
54.0
54.0
55.0
0.58
0.040
54.33
-0.65
-0.56

CA
57.2
57.2
53.1
2.37
0.164
55.83
-0.48
-0.38

CE
70.2
68.9
70.4
0.81
0.060
69.83
1.16
1.26

CG
58.5
61.3
65.0
3.26
0.259
61.60
0.20
0.29

CJ
55.0
61.0
51.0
5.03
0.399
55.67
-0.50
-0.40

CM









CO









CS
54.4
52.2
58.5
3.20
0.251
55.03
-0.57
-0.48

CX
62.0
55.9
50.4
5.80
0.463
56.10
-0.45
-0.35

D
52.4
59.7
63.3
5.55
0.435
58.47
-0.17
-0.07

DB
47.2
47.7
54.0
3.79
0.271
49.63
-1.20
-1.11

DD
87.2
78.0
80.0
4.84
0.367
81.73
2.55
2.65

DE
78.8
78.9
79.0
0.10
0.008
78.90
2.22
2.32

DI








4
DO









DS
53.1
53.5
52.0
0.78
0.060
52.87
-0.82
-0.73

DT
52.9
56.3
58.1
2.64
0.208
55.77
-0.48
-0.39

DZ
60.7
63.2
58.0
2.60
0.208
60.63
0.08
0.18

E
58.6
59.1
56.3
1.49
0.112
58.00
-0.22
-0.13

EB
63.2
60.5
65.2
2.36
0.188
62.97
0.36
0.45

EL








**
• =
No data submitted

TAG SYMBOLS

IT 3 Above control limit.
1 0 3
	
Insufficient data
X 3
Determined to be an outlier
11 = Below control limit
	V
-------
A








	


CRD-LV Performance Evaluation: Blind-A, 15-Oct-1996
5/30
Grosa Alpha







'
Lab
Res. 1
Res. 2

Exper.
Rng anal

Normalized deviation

Res. 3
Sigma
(R + SR)
Average
(grand-avg)
(known) Tae
EO
60.0
53.0
60.0
4.04
0.279
57.67
-0.26
-0.17

ER
62.0
64.9
65.0
1.70
0.120
63.97
0.47
0.57

EV
57.6
46.7
51.7
5.46
0.435
52.00
-0.93
-0.83

EX
23;8
19;9
18.0
2.96
0.231
20,57
-460
-4.51
*
WE









FE:









FJ
5U.4
42.9
46.4
3.75
0.299
46.57
-1.56
-1.47

FL
43.6
39.1
39.0
2.63
0.184
40.57
-2.26
-2.17

FN









FZ
48.5
51.3
61.8
7.01
0.531
53.87
-0.71
-0.61

GI








m
GQ
56.8
56.7
56.6
0.10
0.008
56.70
-0.38
-0.28

GT
46.7
25.2
35.2
10.76
0.858
35.70
-2.83
-2.74

GZ
75.9
75.7
80.3
2.60
0.184
77.30
2.04
2.13

HI
59.4
50.2
50.6
5.20
0.367
53.40
-0.76
-0.67

HK
67.0
65.8
63.1
2.00
0.156
65.30
0.63
0.73

HL
70.1
77.5
76.0
3.91
0.295
74.53
1.71
1.81

HP
HY
49.3
53.3
59.1
4.93
0.391
53.90
-0.70
-0.61

x lill. -
I
55.2
61.6
62.8
4.09
0.303
59.87
-0.01
0.09
* >
ID
57.4
54.6
58.6
2.05
0.160
56.87
-0.36
-0.26

IU
j








#
«
JE
61.2
64.6
65.6
2.31
0.176
63.80
0.46
0.55

JG
65.0
64.9
64.6
0.21
0.016
64.83
0.58
0.67

JM
54.1
49.6
55.7
3.16
0.243
53.13
-0.79
-0.70

JN
74.0
78.4
81.6
3.82
0.303
78.00
2.12
2.21

JQ
74.7
76.1
78.8
2.08
0.164
76.53
1.95
2.04

JS
59.1
57.1
56.6
1.32
0.100
57.60
-0.27
-0.18

JX








•
JY
60.7
55.9
53.8
3.54
0.275
56.80
-0.36
-0.27

K
52.8
52.9
61.2
4.82
0.335
55.63
-0.50
-0.41

KE
275<3
3376
3674
42.84
5.330
323,43
30;84
30.94

KT








.ft
KX
69.0
65.0
65.0
2.31
0.160
66.33
0.75
0.85

L
63.2
59.4
58.0
2.69
0.208
60.20
0.03
0.13

LE
46.4
54.8
43.7
5.79
0.443
48.30
-1.36
-1.26

LF
64.0
56.0
58.0
4.16
0.319
59.33
-0.07
0.03

LL
68.0
82.8
61.3
11.00
0.858
70.70
1.26
1.36

LR
65.0
65.0
64.0
0.58
0.040
64.67
0.56
0.65

LT
40.7
28.3
19.9
10.46
0.830
29.63
-3.54
-3.45
ft
M
97.0
90.0
94.0
3.51
0.279
93.67
3.95
4.05
ft
MF
55.3
55.4
55.3
0.06
0.004
55.33
-0.54
-0.44

MP








*
MV
55.0
64.0
50.0
7.09
0.559
56.33
-0.42
-0.32

• 3
No data submitted

TAG SYMBOLS

IT s Above control limit
0 a
^	
Insufficient data
X 3
Determined to be an outlier
3 Below control limit
	if
-------
If
6/30
6/30

CRD-LV Performance Evaluation: Blind-A, 15-Oct-1996


Gross Alpha








Lab
Res. 1
Res. 2

Exper.
Rng anal

Normalized deviation

Res. 3
Sigma
(R + SR)
Average
(grand-avg)
(known) Tag
MY









N








*
NA
55.0
62.0
52.0
5.13
0.399
56.33
-0.42
-0.32

NH
28.0
30.0
30.0
1.15
0.080
29.33
-3.58
-3.48
u
NJ
44.9
50.5
57.3
6.21
0.495
50.90
-1.05
-0.96

NK
62.2
65.5
63.9
1.65
0.132
63.87
0.46
0.56

NO
66.5
70.4
74.2
3.85
0.307
70.37
1.22
1.32

NT
79.9
78.4
80.8
1.21
0.096
79.70
2.32
2.41

O
66.8
68.5
68.4
0.95
0.068
67.90
0.94
1.03

OB
68.3
72.7
73.8
2.91
0.220
71.60
1.37
1.46

OF
54.0
70.0
68.0
8.72
0.639
64.00
0.48
0.57

OM








4
OS
64.0
70.0
65.0
3.21
0.239
66.33
0.75
0.85

OX
67.3
72.9
74.4
3.74
0.283
71.53
1.36
1.46

OY








, V
P
67.4
94.2
91.2
14.68
1.133
84.27
2.85
2.95

PA









PB
59.1
61.4
59.7
1.19
0.092
60.07
0.02
0.11

PG
69.9
61.7
68.9
4.47
0.327
66.83
0.81
0.91

PM
47.2
45.6
49.7
2.07
0.164
47.50
-1.45
-1.36

PQ








«
PR
54.3
56.6
57.1
1.49
0.112
56.00
-0.46
-0.36

PV
72.3
69.6
60.2
6.35
0.483
67.37
0.87
0.97

PW









Q
59.9
60.8
57.2
1.87
0.144
59.30
-0.07
0.02

QC








•
QM
*8.2
54.6
50.3
3.26
0.255
51.03
-1.04
-0.94

QP









QQ
62.9
60.3
59.7
1.70
0.128
60.97
0.12
0.22

QT
29.2
36.3
44.2
7.50
0.599
36.57
-2.73
-2.64

QU
55.5
55.3
69.2
7.97
0.555
60.00
0.01
0.11

QW
51.3
53.8
52.1
1.28
0.100
52.40
-0.88
-0.78

QX
58.3
58.0
58.9
0.46
0.036
58.40
-0.18
-0.08

QZ
49.4
51.6
45.6
3.04
0.239
48.87
-1.29
-1.20

RD
57.1
55.5
53.6
1.75
0.140
55.40
-0.53
-0.43

RF
63.1
53.1
69.8
8.40
0.666
62.00
0.24
0.34

RG
70.0
74.0
73.0
2.08
0.160
72.33
1.45
1.55

RI
58.7
63.8
66.1
3.79
0.295
62.87
0.35
0.44

RK








*
HP








•
RR
81.0
80.0
83.0
1.53
0.120
81.33
2.51
2.60

RU








•s
RZ
72.9
73.7
70.2
1.83
0.140
72.27
1.45
1.54

S
62.6
67.2
63.8
2.39
0.184
64.53
0.54
0.64

SC
56.5
53.6
57.4
1.99
0.152
55.83
-0.48
-0.38

• s No data submitted	TAG SYMBOLS	IT = Above control limit
0 = Insufficient data	x = Determined to be an outlier	= Below control limit
-------
ft
CRD-LV Performance Evaluation: Blind-A, 15-Oct-1996	7/30
(	 '
Gross Alpha
Lab Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known) Tag
SD
60.2
58.0
59.0
1.10
0.088
59.07
-0.10
0.00

SF
59.0
56.0
56.0
1.73
0.120
57.00
-0.34
-0.25

SG
51.2
61.1
55.9
4.95
0.395
56.07
-0.45
-0.35

SI
66.7
65.7
64.7
1.00
0.080
65.70
0.68
0.77

SL
65.0
60.0
59.0
3.21
0.239
61.33
0.17
0.26

SM
66.2
70.0
59.6
5.26
0.415
65.27
0.63
0.72

SN
45.9
47.2
46.0
0.72
0.052
46.37
-1.59
-1.49

SO
56.4
56.0
61.9
3.30
0.235
58.10
-0.21
-0.12

SR
50.6
52.4
58.5
4.14
0.315
53.83
-0.71
-0.62

SS
53.4
51.3
52.3
1.05
0.084
52.33
-0.89
-0.79

sx
64.0
73.7
60.0
7.04
0.547
65.90
0.70
0.80

SZ
56.9
55.1
56.7
0.99
0.072
56.23
-0.43
-0.34

T
45.7
43.1
43.0
1.53
0.108
43.93
-1.87
-1.77

TD









Ttt
198,1
175,7
1513
22.90
2.577
175:37
13.51
13161
*
TH
59.0
60.0
54.0
3.21
0.239
57.67
-0.26
-0.17

TL








•
TN
58.0
50.5
51.7
4.03
0.299
53.40
-0.76
-0.67

TQ
55.4
55.1
53.8
0.85
0.064
54.77
-0.60
-0.51

TS








«
TY
54.6
55.5
55.7
0.59
0.044
55.27
-0.54
-0.45

U
44.9
37.9
25.6
9.77
0.770
36.13
-2.78
-2.69

UA
64.0
70.0
73.0
4.58
0.359
69.00
1.06
1.16

UE
65.8
65.8
61.9
2.25
0.156
64.50
0.54
0.63

UK








•
UN
41.5
37.6
40.0
1.97
0.156
39.70
-2.37
-2.27

UP
46.4
47.0
51.0
2.50
0.184
48.13
-1.38
-1.28

UQ
55.3
62.7
59.7
3.72
0.295
59.23
-0.08
0.02

VA
91.9
95.0
86.7
4.19
0.331
91.20
3.66
3.76
It
VH
74.6
75.3
72.9
1.23
0.096
74.27
1.68
1.77

VI
66.7
64.6
67.0
1.31
0.096
66.10
0.72
0.82

VJ
138.0
126.0
113.0
12.50
0.998
125.67
im
7i79
X
vat








•
vo
57.0
57.3
62.5
3.09
0.220
58.93
-0.11
-0.02

VT








•
w
68.0
65.8
66.8
1.10
0.088
66.87
0.81
0.91

WE
53.0
43.3
45.9
5.02
0.387
47.40
-1.46
-1.37

WH
60.0
60.4
49.8
6.01
0.423
56.73
-0.37
-0.28

WO
97.5
90.8
86.8
5.41
0.427
91.70
3.72
3.82
tr
WR
72.8
69.8
73.6
2.00
0.152
72.07
1.42
1.52

WW








*
WK








4-
X








i
XA








•
• 3 No data submitted	TAG SYMBOLS	ft — Above control limit
0 3 Insufficient data	x a Determined to be an outlier	II s Below control limit
-------
8/30
CRD-LV Performance Evaluation: Blind-A, 15-Oct-1996
Gross Alpha
Data sorted by laboratory Average
Average
Tag
Lab
Average
Tag
Lab
Average
Tag
Lab
20.57
X
EX
55.77

DT
62.97

EB
29.33
Ji
NH
55.83

SC
63.13

AJ
29.63

LT
55.83

CA
63.80

JE
35.70

GT
56.00

PR
63.87

NK
36.13

U
56.07

SG
63.97

ER
36.57

QT
56.10

CX
64.00

OF
39.70

UN
56.23

SZ
64.50

UE
40.57

FL
56.33

NA
64.53

S
40.87

AH
56.33

MV
64.67

LR
43.93

T
56.67

BK
64.83

JG
44.93

AE
56.70

GQ
65.20

AR
46.37

SN
56.73

WH
65.27

SM
46.57

FJ
56.80

JY
65.30

HK
47.40

WE
56.87

ID
65.70

SI
47.50

PM
57.00

SF
65.90

SX
48.13

UP
57.60

JS
66.10

VI
48.30

LE
57.67

TH
66.33

OS
48.87

QZ
57.67

EO
66.33

KX
49.53

AZ
58.00

E
66.83

PG
49.63

DB
58.10

SO
66.87

W
49.70

BB
58.40

QX
67.33

BG
50.90

NJ
58.47

D
67.37

PV
51.03

QM
58.63

BA
67.90

O
51.90

A
58.93

VO
68.57

AK
52.00

EV
59.07

SD
68.67

BS
52.33

ss
59.23

UQ
69.00

UA
52.40

QW
59.30

Q
69.83

CE
52.53

BH
59.33

LF
70.37

NO
52.87

DS
59.37

AF
70.70

LL
53.13

JM
59.60

BO
71.07

BC
53.40

TN
59.87

I
71.53

OX
53.40

m
60.00

QU
71.60

OB
53.83

SR
60.07

PB
72.07

WR
53.87

FZ
60.20

L
72.27

RZ
53.90

HP
60.63

DZ
72.33

RG
54.10

AW
60.97

QQ
74.27

VH
54.33

C
61.33

SL
74.53

HL
54.77

TQ
61.40

AP
76.53

JQ
55.03

CS
61.60

CG
77.30

GZ
55.27

TY
62.00

RF
78.00

JN
55.33

MF
62.00

AU
78.90

DE
55.40

RD
62.03

AL
79.70

NT
55.63

K
62.07

BM
81.33

RR
55.67

CJ
62.87

RI
81.73

DD
• s No data submitted
0 s Insufficient data

TAG SYMBOLS
x s Determined to be an outlier
It
Jl
= Above control limit
= Below control limit
-------
CRD-LV Performance Evaluation: Blind-A, 15-Oct-1996
9/30
Gross Alpha
Data sorted by Laboratory Average
Average
Tac
Lab
Average
Tag
Lab
Average
Tag
Lab
84.27

P
91.70
ft
WO
125.67
X
VJ
91.20
IT
VA
93.67
It
M
175.37
X
TG






323.43
X
KE
% responding labs
Frequency distribution
10-
0
T
T

0	+2
% responding labs
•4	-2	0+2+4
Normalized deviation of the mean from the known value
Frequency distribution
+6
104
0
¦¦¦uiilijii
iifii
1
-6
-4	-2	0	+2	+4
Normalized deviation of the mean from the grand average
• s No data submitted	TAG SYMBOLS	It s Above control limit
0 a Insufficient data	x s Determined to be an outlier	U a Below control limitj
-------
CRD-LV Performance Evaluation: Blind-A, 15-Oct-1996
10/30
Radium-226
Statistical Summary
179 Participants
The known value of this nuclide is 9.9 pCi/1 with an expected precision of 1.5; the control limits
are 7.3 to 12.5; the warning regions are 7.3 to 8.2 and 11.6 to 12.5
81 (45.3 %) Failed to respond
6(3.4 %) Outliers
7(3.9 %) Out of control
but not an outlier
Statistic
. 79(44.1 %) Within all limits
Respondents
---- 6(3.4 %) In warning zone
but within control
Non-outliers
Mean
Std. Dev.
Variance
% Coef. of Var.
% deviation of mean from known value
Norm. dev. of mean from known value
Median
% deviation of median from known value
Norm. dev. of median from known value
9.59
2.30
5.28
23.97
-3.12
-0.13
9.63
-2.69
-0.12
Grand Avg 9.60
1.21
1.46
12.58
-3.04
-0.25
9.63
-2.69
-0.22
13(13.3 %) More than 3 norm. S.D
6(6.1 %) Between 2 and 3 norm. S.D
53(54.1 %) Within 1 norm. S.D.
of known value
26(26.5 %)
1 and 2 norm. S.D.
-------
if
11/30

CRD-LV Performance Evaluation: Blind-A, 15-Oct-1996


Radium-226








Lab
Res. 1


Exper.
Rng anal

Normalized deviation

Res. 2
Res. 3
Sigma
(R + SR)
Average
(grand-avg)
(known) Tag
A
8.9
8.6
8.2
0.35
0.276
8.57
-1.19
-1.54

AE
9.4
9.7
9.3
0.21
0.158
9.47
-0.15
-0.50

AF
9.0
9.0
9.5
0.29
0.197
9.17
-0.50
-0.85

AH
9.0
9.6
9.7
0.38
0.276
9.43
-0.19
0.54

AJ
5.6
3.5
3.5
1.15
0.788
4.17
-6.27
6.62
X
AK
9.4
10.6
9.0
0.83
0.630
9.67
0.08
-0.27

AL
8.5
8.9
9.7
0.61
0.473
9.03
-0.65
-1.00

AP
7.3
8.9
7.6
0.85
0.630
7.93
-1.92
-2.27

AR









AU
5.0
4.0
3*7
0.68
0.512
4.23
-6.20
-6.54-
x
AW
9.4
9.7
8.8
0.46
0.354
9.30
-0.35
-0.69

AZ
9.4
10.9
10.2
0.75
0.591
10.17
0.66
0.31

BA
7.6
7.9
7.2
0.35
0.276
7.57
-2.35
-2.69

BB








•
BC
9.2
9.2
8.1
0.64
0.433
8.83
-0.88
-1.23

BG








•'
BH
7.6
9.0
7.4
0.87
0.630
8.00
-1.85
-2.19

BK
9.4
9.8
9.7
0.21
0.158
9.63
0.04
-0.31

BL









BM
9.6
9.7
9.9
0.15
0.118
9.73
0.15
-0.19

BN
5.6
6.7
7.3
0.86
0.669
6.53
-3.54
-3.89

BO
10.3
10.0
9.8
0.25
0.197
10.03
0.50
0.15

BS








•
BW








•
C
8.9
9.5
10.7
0.92
0.709
9.70
0.12
-0.23

CA
7.4
7.4
7.9
0.29
0.197
7.57
-2.35
-2.69

CE
9.7
9.2
9.2
0.29
0.197
9.37
-0.27
-0.62

CG
9.0
7.7
10.7
1.50
1.345
9.13
-0.54
-0.89

CJ
10.0
10.0
10.0
0.00
0.000
10.00
0.46
0.12

CM








•
CO








•
cs
11.3
10.3
10.9
0.50
0.394
10.83
1.42
1.08

cx








•
D








•
DB
9.5
9.0
8.8
0.36
0.276
9.10
-0.58
-0.92

DO









DE
10.9
10.9
11.0
0.06
0.039
10.93
1.54
1.19

DI









DO









DS








>9i
DT
8.5
8.3
8.6
0.15
0.118
8.47
-1.31
-1.66

DZ
10.6
10.8
9.8
0.53
0.394
10.40
0.92
0.58

E
9.4
9.1
8.4
0.51
0.394
8.97
-0.73
-1.08

EB
8.9
9.0
9.0
0.06
0.039
8.97
-0.73
-1.08

EL
8.7
9.4
9.1
0.35
0.276
9.07
-0.62
-0.96

• = No data submitted	TAG SYMBOLS	It = Above control limit
0 = Insufficient data	x s Determined to be an outlier	^ h Below control limit
v1"	1	— i ¦ ¦ ¦			'	' ~
-------
CRD-LV Performance Evaluation: Blind-A, 15-Oct-1996	12/30
Radium-226
Lab Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known) Tag
EO
10.2
10.6
9.9
0.35
0.276
10.23
0.73
0.38
ER
8.3
7.8
7.9
0.26
0.197
8.00
-1.85
-2.19
Etr







*-
EX








FE,







•
FF








FJ







*¦
FL







*
FN:







M-
FZ
13.6
12.2
13.6
0.81
0.551
13.13
4.08
3.73 fr
or







¦ *-
GQ
10.0
9.4
10.5
0.55
0.433
9.97
0.42
0.08
GT







•
GZ







»
HI








HK
9.5
9.5
9.8
0.17
0.118
9.60
0.00
-0.35
HL
9.4
9.4
9.4
0.00
0.000
9.40
-0.23
-0.58
HP
10.6
10.4
11.5
0.59
0.433
10.83
1.42
1.08
HX*








I
8.8
9.0
12.1
1.85
1.570
9.97
0.42
0.08
ID
9.2
9.7
9.2
0.29
0.197
9.37
-0.27
-0.62
IU
j







•
V
(IE
8.7
8.8
12.0
1.88
1.570
9.83
0.27
«
-0.08
JG








JM







•
JN







•
JQ







•
JS
9.9
11.0
10.0
0.61
0.433
10.30
0.81
0.46
JX
8.1
8.7
8.9
0.42
0.315
8.57
-1.19
-1.54
JY
8.4
7.7
10.5
1.46
1.195
8.87
-0.85
-1.19
K
9.0
8.7
9.5
0.40
0.315
9.07
-0.62
-0.96
KB







•
KT







*
KX







•
L
9.3
9.2
8.7
0.32
0.236
9.07
-0.62
-0.96
LE








' lf







*
11*







V
LR
do:
24.0
25.0
1:00
0.788
25.00
1117®
17.44 X
LT
12.4
11.4
11.0
0.72
0.551
11.60
2.31
1.96
M
8.3
9.6
11.1
1.40
1.195
9.67
0.08
-0.27
MF







•
MP







•
MV








• 5
No data submitted
Insufficient data
x =
TAG SYMBOLS
Determined to be an outlier
ft a Above control limit-
U 3 Below control limit
-------
r,
13/
30
CRD-LV Performance Evaluation: Blind-A, 15-Oct-1996

	^
Radium-226







"X
Lab
Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known) Tag
MY








•
N








•
NA








•
NH
7.4
8.0
9.6
1.14
0.866
8.33
-1.46
-1.81

NJ
9.2
9.6
9.5
0.21
0.158
9.43
-0.19
-0.54

NK








a
NO
9.3
9.4
10.6
0.72
0.512
9.77
0.19
-0.15

NT
10.6
9.9
10.2
0.35
0.276
10.23
0.73
0.38

0
9.5
10.2
10.4
0.47
0.354
10.03
0.50
0.15

OB
10.5
10.9
10.8
0.21
0.158
10.73
1.31
0.96

OF
6.1
8.1
6.8
1.01
0.788
7.00
-3.00
-3.35
u
OM








•
OS








•
OX
10.0
9.4
9.5
0.32
0.236
9.63
0.04
-0.31

OY








9
P
11.6
11.3
12.1
0.40
0.315
11.67
2.39
2.04

PA








•
PB
8.9
9.0
9.0
0.06
0.039
8.97
-0.73
-1.08

PG
6.5
7.1
7.5
0.50
0.394
7.03
-2.96
-3.31

PM








•:
PQ
13.0
11.0
14.0
1.53
1.345
12.67
3.54
3.19
it
PR









PV
48
410
4*2
0.42
01315
4,33
-6.08
-6s43
X
PW
1417
14.9
14.9
0.12
0.079
14.83
6,04
5,70
X
Q
10.3
9.9
10.5
0.31
0.236
10.23
0.73
0.38

QC








•
QM
10.7
10.4
10.0
0.35
0.276
10.37
0.89
0.54

QP








. •
QQ
4 2
4 2
4.2
0.00
0.000
4.20
-6.23
-6.58
X
QT
6.6
6.4
6.4
0.12
0.079
6.47
-3.62
-3.96

QU
7.9
11.9
9.9
2.00
2.095
9.90
0.35
0.00

QW








».
QX
9.8
9.6
9.9
0.15
0.118
9.77
0.19
-0.15

QZ
10.4
9.0
9.4
0.72
0.551
9.60
0.00
-0.35

RD
9.8
9.5
9.3
0.25
0.197
9.53
-0.08
-0.42

RF
9.6
10.4
10.2
0.42
0.315
10.07
0.54
0.19

RG








m
HI









RK








Mi
RP








P.i
RR








¥
RU









RZ
10.4
10.4
10.5
0.06
0.039
10.43
0.96
0.62

S
10.9
11.0
10.4
0.32
0.236
10.77
1.35
1.00

sc
9.8
7.9
7.4
1.27
0.945
8.37
-1.42
-1.77

• =
No data submitted

TAG SYMBOLS

It s Above control limit
[0-
Insufficient data
X S
Determined to be an outlier
3 Below control limit 1
	'J
-------
CRD-LV Performance Evaluation: Blind-A, 15-Oct-1996	14 / 30
Radium-226
Lab Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known) Tag
SD
9.2
10.5
9.4
0.70
0.512
9.70
0.12
-0.23
SF
9.3
10.0
9 fi
0.35
0.276
9.63
0.04
-0.31
SG







•
SI
8.5
9.8
9.3
0.66
0.512
9.20
-0.46
-0.81
SL







•
SM
8.7
9.9
9.6
0.62
0.473
9.40
-0.23
-0.58
SN







•
SO







•-
s&







•
SS
9.2
8.0
8.7
0.60
0.473
8.63
-1.12
-1.46
sx
11.2
11.2
11.1
0.06
0.039
11.17
1.81
1.46
sz
11.8
11.5
10.3
0.79
0.591
11.20
1.85
1.50
T
10.0
9.9
10.5
0.32
0.236
10.13
0.62
0.27
TD








Ttt







*.
TH
9.2
8.3
9.1
0.49
0.354
8.87
-0.85
-1.19
11.







•
TN
8.8
8.8
7.6
0.69
0.473
8.40
-1.38
-1.73
TQ
10.0
9.3
9.7
0.35
0.276
9.67
0.08
-0.27
rs








m







•
u
8.8
9.0
9.2
0.20
0.158
9.00
-0.69
-1.04
UA







•-
UE
10.8
11.2
11.1
0.21
0.158
11.03
1.66
1.31
UK







••
UN
8.7
8.4
8.0
0.35
0.276
8.37
-1.42
-1.77
UP
10.6
11.3
11.5
0.47
0.354
11.13
1.77
1.42
UQ
9.5
10.5
9.6
0.55
0.394
9.87
0.31
-0.04
VA
14.5
9.1
8.4
3.34
3.671
10.67
1.23
0.89
VH
10.4
11.1
11.7
0.65
0.512
11.07
1.69
1.35
VI
12.8
13.0
13.0
0.12
0.079
12.93
3.85
3.50 ft
yj







fLv
VM








vo







*
VT







~
w
9.2
9.9
10.3
0.56
0.433
9.80
0.23
-0.12
WK







>
WH
10.2
9.1
10.2
0.64
0.433
9.83
0.27
-0.08
WO
6.4
10.8
10.0
2.34
2.395
9.07
-0.62
-0.96
WR







•-
WW







•
It X-
. X








XA
10.5
9.7
10.8
0.57
0.433
10.33
0.85
0.50
• a No data submitted	TAG SYMBOLS	It a Above control limit
0 3 Insufficient data	x s Determined to be an outlier	11 s Below control limit
^			JJ
-------
15 ! 3®	CRD-LV Performance Evaluation: Blind-A, 15-Oct-1996
V		
Radium-226
Data sorted by Laboratory Average
Average
Tag
Lab
Average
Tag
Lab
Average
Tag
Lab
4.17
X
AJ
9.07

EL
9.97

I
4.20
X
QQ
9.10

DB
10.00

CJ
4.23
X
AU
9.13

CG
10.03

O
4.33
X
PV
9.17

AF
10.03

BO
6.47
4
QT
9.20

SI
10.07

RF
6.53

BN
9.30

AW
10.13

T
7.00
u
OF
9.37

ID
10.17

AZ
7.03

PG
9.37

CE
10.23

Q
7.57

CA
9.40

HL
10.23

NT
7.57

BA
9.40

SM
10.23

EO
7.93

AP
9.43

NJ
10.30

JS
8.00

ER
9.43

AH
10.33

XA
8.00

BH
9.47

AE
10.37

QM
8.33

NH
9.53

RD
10.40

DZ
8.37

UN
9.60

QZ
10.43

RZ
8.37

sc
9.60

HK
10.67

VA
8.40

TN
9.63

OX
10.73

OB
8.47

DT
9.63

BK
10.77

S
8.57

JX
9.63

SF
10.83

HP
8.57

A
9.67

TQ
10.83

CS
8.63

ss
9.67

M
10.93

DE
8.83

BC
9.67

AK
11.03

UE
8.87

TH
9.70

SD
11.07

VH
8.87

JY
9.70

C
11.13

UP
8.97

PB
9.73

BM
11.17

SX
8.97

EB
9.77

QX
11.20

SZ
8.97

E
9.77

NO
11.60

LT
9.00

U
9.80

W
11.67

P
9.03

AL
9.83

WH
12.67
11
PQ
9.07

WO
9.83

JE
12.93

VI
9.07

L
9.87

UQ
13.13
ft
FZ
9.07

K
9.90

QU
14.83
X
PW



9.97

GQ
25.00
X
LR
responding labs	Frequency distribution
10-
JMiUplMJ
j- ¦ [ " M t M—y¦¦¦¦¦¦—j-— y	t ~ , ¦
-4	-2	0	+2	+4	+6
Normalized deviation of the mean from the known value
• s No data submitted	TAG SYMBOLS	IT a Above control limit
0 = Insufficient data	x = Determined to be an outlier	11 a Below control limit
-------
CRD-LV Performance Evaluation: Blind-A, 15-Oct-1996
16/30
Radium-226
% responding labs	Frequency distribution
10-
2*	,	j - t* .
¦l.lH"!
....	I " I	T
-4	-2	6+2+4
Normalized deviation of the mean from the grand average
-------
CRD-LV Performance Evaluation: Blind-A, 15-Oct-1996
17/30
Radium-228	Statistical Summary	179 Participants
The known value of this nuclide is 5.1 pCi/1 with an expected precision of 1.3; the control limits
are 2.8 to 7.4; the warning regions are 2.8 to 3.6 and 6.6 to 7.4
92(51.4 %) Failed to respond
; 69(38.5 %) Within all limits
2(1.1 %) Outliers
5(2.8 %) Out of control
but not an outlier
Statistic
Respondents
11 (6.1 %) In warning zone
but within control
Non-outliers
Mean
Std. Dev.
Variance
% Coef. of Var.
% deviation of mean from known value
Norm. dev. of mean from known value
Median
% deviation of median from known value
Norm. dev. of median from known value
5.60
Grand Avg 5.40
1.84
1.19
3.40
1.42
32.90
22.06
9.87
5.90
.0.27
0.25
5.33
5.33
4.58
4.58
0.13
0.20
-------

18/30
CRD-LV Performance Evaluation: Blind-A, 15-Oct-1996


Radium-228








Lab
Res. 1
Res. 2

Exper.
Rng anal

Normalized deviation

Res. 3
Sigma
(R + SR)
Average
(grand-avg)
(known) Tag
A
7.0
6.7
6.1
0.46
0.409
6.60
1.60
2.00

AE
6.2
6.3
6.8
0.32
0.273
6.43
1.38
1.78

AF
5.8
5.4
5.5
0.21
0.182
5.57
0.22
0.62

AH
4.5
4.4
5.1
0.38
0.318
4.67
-0.98
-0.58

AJ
5.8
2.8
3.1
1.65
1.692
3.90
-2.00
-1.60

AK
6.8
7.2
5.8
0.72
0.636
6.60
1.60
2.00

AL
6.0
5.8
6.0
0.12
0.091
5.93
0.71
1.11

AP
4.0
5.0
43
0.51
0.454
4.43
-1.29
-0.89

AR








•
AU
2.3
1.9
1.5
0.40
0.363
1.90
-4.66
-4.26

AW
5.0
5.9
5.3
0.46
0.409
5.40
0.00
0.40

AZ
5.5
6.6
7.7
1.10
1.000
6.60
1.60
2.00

BA
5.2
5.3
5.3
0.06
0.045
5.27
-0.18
0.22

BB








•
BC
4.1
4.1
4.0
0.06
0.045
4.07
-1.78
-1.38

BO









BH
5.1
6.6
6.0
0.75
0.682
5.90
0.67
1.07

BK
4.8
4.8
5.0
0.12
0.091
4.87
-0.71
-0.31

BL








•
BM
4.7
5.4
4.5
0.47
0.409
4.87
-0.71
-0.31

BN








•
BO
7.0
6.4
5.5
0.75
0.682
6.30
1.20
1.60

BS








•
BW








•
C
5.0
5.1
5.3
0.15
0.136
5.13
-0.36
0.04

CA
4.6
4.5
5.1
0.32
0.273
4.73
-0.89
-0.49

CE
4.1
5.0
4.2
0.49
0.409
4.43
-1.29
-0.89

CG
6.2
4.7
5.1
0.78
0.682
5.33
-0.09
0.31

CJ
5.8
5.2
5.4
0.31
0.273
5.47
0.09
0.49

CM








•
CO








•
CS
4.4
4.9
4.9
0.29
0.227
4.73
-0.89
-0.49

CX








•
D








•
DB
5.7
5.4
5.2
0.25
0.227
5.43
0.04
0.44

DD








•
DE
6.5
6.6
6.7
0.10
0.091
6.60
1.60
2.00

DI








•
DO








•
DS








•
DT
7.8
7.6
7.4
0.20
0.182
7.60
2.93
3.33
1T
DZ
4.6
5.3
5.1
0.36
0.318
5.00
-0.53
-0.13

ifi
EB
4.5
4.3
4.1
0.20
0.182
4.30
-1.47
-1.07

EL
6.1
7.5
6.4
0.74
0.636
6.67
1.69
2.09

• =
No data submitted

TAG SYMBOLS

ft = Above control limit
0 a
Insufficient data
x =
Determined to be an outlier
U = Below control limit
¦4
-------
	







	X


CRD-LV Performance Evaluation: Blind-A, 15-Oct-1996
19/30
Radium-228











Exper.
Rng anal

Normalized deviation
Lab
Res. 1
Res. 2
Res. 3
Sigma
(R + SR)
Average
(grand-avg)
(known) Tag
EO
5.4
5.3
5.3
0.06
0.045
5.33
-0.09
0.31
ER







•
EV







*
EX







•
Fl£;







•
FF







•
FJ








FL







~








•
FZ
5.0
5.3
4.5
0.40
0.363
4.93
-0.62
-0.22
61







•
GQ
leo
17.4
19,0
1.50
1.692
17147
l&Ofr
16,48 x
GT







•>
QX








HL







~ '
HK
5.4
4.9
4.8
0.32
0.273
5.03
-0.49
-0.09
HL
3.8
4.8
5.4
0.81
0.727
4.67
-0.98
-0.58
HP
4.3
5.6
5.5
0.72
0.591
5.13
-0.36
0.04
I
5.4
5.2
7.2
1.10
0.909
5.93
0.71
1.11
ID
7.0
7.4
7.0
0.23
0.182
7.13
2.31
2.71
IU







•
J








JE







•>
JO








JM







•
JN







•
JQ







•
JS
6.4
7.8
5.5
1.16
1.086
6.57
1.55
1.95
JX
3.7
4.7
3.0
0.85
0.772
3.80
-2.13
-1.73
JY
3.7
3.9
2.7
0.64
0.545
3.43
-2.62
-2.22
K
6.8
6.1
6.4
0.35
0.318
6.43
1.38
1.78
KB








KT







¦P
KX







'#
L
5.2
5.2
5.1
0.06
0.045
5.17
-0.31
0.09
LE







%
LF







*
LL







•-
LR








LT
3.5
3.3
3.7
0.20
0.182
3.50
-2.53
-2.13
M
6.5
7.5
8.0
0.76
0.682
7.33
2.57
2.98
MF







•
MP








itvi








• s
No data submitted

TAG SYMBOLS

ft a Above control limit
|j0-
Insufficient data
X —
Determined to be an outlier
U 3 Below control limit
'J
-------
20 / 30	CRD-LV Performance Evaluation: Blind-A, 15-Oct-1996
v			 	
Radium-228
Lab
Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known) Tag
MY









N' '








•
NA








• <
NH
5.5
4.9
5.0
0.32
0.273
5.13
-0.36
0.04

NJ
5.3
5.0
7.0
1.08
0.909
5.77
0.49
0 89

NK









NO
6.4
6.6
7.0
0.31
0.273
6.67
1.69
2.09

NT
4.3
4.2
4.1
0.10
0.091
4.20
-1.60
-1.20

0
4.8
3.4
2.9
0.98
0.863
3.70
-2.27
-1.87

OB








' •
OF
7.6
7.7
11.7
2.34
2.644
9.00
4.80
5.20
rr
OM








•-
OS








•
OX
4.7
4.3
4.7
0.23
0.182
4.57
-1.11
-0.71

OY








•
P
3.7
4.9
4.3
0.60
0.545
4.30
-1.47
-1.07

PA








•
PB
4.8
4.7
4.8
0.06
0.045
4.77
-0.84
-0.44

PG








. •-
PM








m
PQ








9
PR








•-
PV
2.0
1.3
2.8
0.75
0.682
2.03
-4.49
-4.09

PW
5.7
5.7
5.4
0.17
0.136
5.60
0.27
0.67

Q
5.3
6.0
5.0
0.51
0.454
5.43
0.04
0.44

QC








«.
QM








«
QP









QQ








•
QT
7.1
6.2
7.8
0.80
0.727
7.03
2.18
2.58

QU
4.8
6.6
5.7
0.90
0.818
5.70
0.40
0.80

QW








•
QX
10*6

12.7
1.55
1.692
10.97
7.42
7.82
X
QZ
4.8
4.5
4.4
0.21
0.182
4.57
-1.11
-0.71

RD
4.7
5.4
4.6
0.44
0.363
4.90
-0.67
-0.27

RF
4.9
5.7
5.3
0.40
0.363
5.30
-0.13
0.27

RG








•
RI








•
RK








•
RP








•
BR








•
RU
5.3
5.2
5.6
0.21
0.182
5.37
-0.05
0.36

RZ
4.6
4.6
4.8
0.12
0.091
4.67
-0.98
-0.58

S
6.7
4.6
5.4
1.06
0.954
5.57
0.22
0.62

sc
5.6
4.9
5.0
0.38
0.318
5.17
-0.31
0.09

• 3
No data submitted

TAG SYMBOLS

IT = Above control limit
0 = Insufficient data	x = Determined to be an outlier	Ji = Below control limit J
==/
-------
	
CRD-LV Performance Evaluation: Blind-A, 15-Oct-1996	21 / 30
Radium-228
Lab Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known) Tae
SD
6.3
5.9
5.6
0.35
0.318
5.93
0.71
1.11
SF
5.8
6.2
8.6
1.51
1.518
6.87
1.96
2.as
SO







»
SI
4.1
4.1
4.1
0.00
0.000
4.10
-1.73
-1.33
SL







9
SM
5.3
3.7
5.0
0.85
0.727
4.67
-0.98
-0.58
SN








SO







•
SR







•
ss
6.3
6.9
6.2
0.38
0.318
6.47
1.42
1.82
sx
6.4
6.4
6.4
0.00
0.000
6.40
1.33
1.73
sz
6.6
7.1
6.9
0.25
0.227
6.87
1.95
2.35
T
5.8
5.8
6.0
0.12
0.091
5.87
0.62
1.02
TD







•
TO







*
TH
7.1
5.6
5.9
0.79
0.682
6.20
1.06
1.47
TL







I
TN
4.0
b.z
4.1
0.67
0.545
4.43
-1.29
-0.89
TQ
4.5
5.5
5.7
0.64
0.545
5.23
-0.22
0.18
TS








TY








U
4.6
5.5
5.1
0.45
0.409
5.07
-0.45
-0.04
UA








UE
3.4
4.3
4.1
0.47
0.409
3.93
-1.96
-1.55
UK:







•<
UN
6.0
5.7
5.6
0.21
0.182
5.77
0.49
0.89
UP
6.3
6.8
6.1
0.36
0.318
6.40
1.33
1.73
UQ
4.7
4.6
4.3
0.21
0.182
4.53
-1.16
-0.75
VA







m
VH
7.6
6.2
7.5
0.78
0.636
7.10
2.26
2.66
VI
7.7
5.8
7.4
1.02
0.863
6.97
2.09
2.49
VJ







; •
VM







•
VO







•
VT







*
W
3.4
5.4
5.2
1.10
0.909
4.67
-0.98
-0.58
WE







*
WH
5.8
5.5
5.2
0.30
0.273
5.50
0.13
0.53
WO
5.7
10.7
6.2
2.75
3.422
7.53
2.84
3.24 IT
WR







P
WW







•
WY







•
X








XA







•
• s No data submitted	TAG SYMBOLS	ft s Above control limit
0 e Insufficient data	x s Determined to be an outlier	JJ. a Below control limit
Vfr	—				JJ
-------
22/30
CRD-LV Performance Evaluation: Blind-A, 15-Oct-1996
Radium-228
Data sorted by Laboratory Average
Average
Tag
Lab
Average
Tag
Lab
Average
Tag
Lab
1.90
u
AU
4.90

RD
5.93

I
2.03
u
PV
4.93

FZ
5.93

SD
3.43

JY
5.00

DZ
5.93

AL
3.50

LT
5.03

HK
6.20

TH
3.70

O
5.07

U
6.30

BO
3.80

JX
5.13

NH
6.40

UP
3.90

AJ
5.13

HP
6.40

SX
3.93

UE
5.13

C
6.43

K
4.07

BC
5.17

SC
6.43

AE
4.10

SI
5.17

L
6.47

SS
4.20

NT
5.23

TQ
6.57

JS
4.30

P
5.27

BA
6.60

DE
4.30

EB
5.30

RF
6.60

AZ
4.43

TN
5.33

EO
6.60

A
4.43

CE
5.33

CG
6.60

AK
4.43

AP
5.37

RU
6.67

NO
4.53

UQ
5.40

AW
6.67

EL
4.57

OX
5.43

DB
6.87

SZ
4.57

QZ
5.43

Q
6.87

SF
4.67

w
5.47

CJ
6.97

VI
4.67

SM
5.50

WH
7.03

QT
4.67

RZ
5.57

S
7.10

VH
4.67

HL
5.57

AF
7.13

ID
4.67

AH
5.60

PW
7.33

M
4.73

CA
5.70

QU
7.53
ft
WO
4.73

CS
5.77

UN
7.60
IT
DT
4.77

PB
5.77

NJ
9.00
IT
OF
4.87

BM
5.87

T
10.97
X
QX
4.87

BK
5.90

BH
17.47
X
GQ
% responding labs
io-	
Frequency distribution


i,:T„
-r"
*6
¦6
~r
4	-2	0	+2	+4
Normalized deviation of the mean from the known value
• 3 No data submitted
0 = Insufficient data
TAG SYMBOLS
x = Determined to be an outlier
It 3 Above control limit
U 3 Below control limit
-------
CRD-LV Performance Evaluation: Blind-A, 15-Oct-1996
23/30
Radium-228
% responding labs	Frequency distribution
10i .. - - -j - j j - j j . . u	
41umi

•4	-2	0	+2	+4	+6
Normalized deviation of the mean from the grand average
-------
CRD-LV Performance Evaluation: Blind-A, 15-Oct-199fl
24/30
Uranium (Natural)	Statistical Summary	181 Participants
The known value of this nuclide is 40.9 pCi/1 with an expected precision of 4.1; the control limits
are 33.8 to 48.0; the warning regions are 33.8 to 36.2 and 45.6 to 48.0
76(42.0 %) Failed to respond
6(4.4 %) Outliers
12(6.6 %) Out of control
but not an outlier
Statistic
. 77(42.5 %) Within all limits
Respondents
8(4.4 %) In warning zone
but within control
Non-outliers
Mean
Std. Dev.
Variance
% Coef. of Var.
% deviation of mean from known value
Norm. dev. of mean from known value
Median
% deviation of median from known value
Norm. dev. of median from known value
39.31
Grand Avg 39.42
8.64
4.07
74.67
16.57
21.98
10.33
-3.89
-3.62
-0.18
-0.36
39.23
39.50
-4.07
-3.42
-0.19
-0.34
-------
25 / 30	CRD-LV Performance Evaluation: Blind-A, 15-Oct-1996
Uranium (Natural)
Lab
Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known)
Tag
A
39.9
38.2
39.2
0.85
0.245
39.10
-0.14
-0.76

AE
39.2
41.1
41.3
1.16
0.303
40.53
0.47
-0.15

AF
49.0
47.1
49.3
1.19
0.317
48.47
3.82
3.20
ft
AH
32.0
32.9
30.0
1.48
0.418
31.63
-3.29
-3.91
11
AJ
42.1
47.1
47.0
2.86
0.720
45.40
2.53
1.90

AK
38.0
37.5
36.9
0.55
0.158
37.47
-0.83
-1.45

AL
41.0
45.7
41.9
2.49
0.677
42.87
1.46
0.83

AP
37.1
44.8
47.0
5.20
1.812
42.97
1.50
0.87

AR
37.5
37.0
36.6
0.45
0.130
37.03
-1.01
-1.63

AU








•
AW
43.2
42.9
41.9
0.68
0.187
42.67
1.37
0.75

AZ
42.0
40.4
41.6
0.83
0.231
41.33
0.81
0.18

BA
38.4
40.3
39.9
1.00
0.274
39.53
0.05
-0.58

BB
37.7
35.8
36.8
0.95
0.274
36.77
-1.12
-1.75

BC
39.1
39.8
39.6
0.36
0.101
39.50
0.03
-0.59

BG
34.9
34.4
35.1
0.36
0.101
34.80
-1.95
-2.58

BG
47.0
43.0
43.0
2.31
0.576
44.33
2.08
1.45

BG
38.4
41.1
40.1
1.37
0.389
39.87
0.19
-0.44

BH
37.7
33.8
41.9
4.05
1.318
37.80
-0.68
-1.31

BK
37.6
36.9
38.0
0.56
0.158
37.50
*081
-1.44

BL








m ' .
BM
39.7
42.6
44.3
2.33
0.663
42.20
1.17
0.55

BN
37.8
32.6
34.2
2.66
0.749
34.87
-1.92
-2.55

BO
36.6
36.3
40.9
2.57
0.663
37.93
-0.63
-1.25

BS








*
BW









C
42.2
38.5
36.6
2.85
0.807
39.10
-0.14
-0.76

CA
31.0
31.6
33.2
1.14
0.317
31.93
-3.16
-3.79
u
CE
36.6
35.8
36.1
0.40
0.115
36.17
-1.37
-2.00

CG
41.5
42.0
49.7
4.60
1.345
44.40
2.10
1.48

CJ
40.0
37.0
36.0
2.08
0.576
37.67
-0.74
¦1.37

CM
10,5
10;3
10:2
0.16
0.043
10.33
-1229
-12.91
;x
ca









cs
38.1
38.2
37.4
0.44
0.115
37.90
-0.64
-1.27

cx
46.0
45.9
46.0
0.05
0.014
45.97
2.77
2.14

D
39.3
37.4
38.3
0.95
0.274
38.33
-0.46
-1.08

DB
32.9
30.7
33.9
1.64
0.461
32.50
-2.92
-3.55

DD









DE
42.0
42.9
43.0
0.55
0.144
42.63
1.36
0.73

DI
41.8
41.2
39.0
1.47
0.403
40.67
0.53
-0.10

DO
36.9
38.3
37.7
0.70
0.202
37.63
-0.76
-1.38

D8








*
DT
45.0
44.7
45.5
0.40
0.115
45.07
2.39
1.76

DZ
36.9
34.7
37.3
1.40
0.375
36.30
-1.32
-1.94

E
39.1
38.4
36.7
1.23
0.346
38.07
-0.57
-1.20

• =
No data submitted

TAG SYMBOLS

IT s Above control limit
0 = Insufficient data	x s Determined to be an outlier	s Below control limit
^		v
-------
(t	

CRD-LV Performance Evaluation: Blind-A, 15-Oct-1996
	X
26/30
Uranium (Natural)







Lab
Res. 1
Res. 2

Exper.
Rng anal

Normalized deviation

Res. 3
Sigma
(R + SR)
Average
(grand-avg)
(known) Tag
EB
38.3
38.5
37.8
0.36
0.101
38.20
-0.52
-1.14

EL
38.7
38.2
39.3
n.55
0.158
38.73
-0.29
-092

£0









ER
37.5
36.7
37.7
0.53
0.144
37.30
-0.90
-1.52

EV









EX









FE
41.0
41.0
41.0
0.00
0.000
41.00
0.67
0.04

FP-








'¥
FJ
22,9
2215
21:4
0,78
0.216
2227
>7*25
4m
k
FL









FN









PZ
09.4
67; 1
67.1
1.33
0.331
67.87
12,02
11.39

01








•
GQ
36.0
36.7
37.5
0.75
0.216
36.73
-1.14
-1.76

QT








•<
GZ








»-
HI









HK
32.6
27.3
31.6
2.82
0.764
30.50
-3.77
-4.39

HL
41.8
41.9
40.7
0.67
0.173
41.47
0.86
0.24

HP
38.3
38.4
37.9
0.26
0.072
38.20
-0.52
-1.14

HX








•
I
35.6
44.0
47.0
5.91
2.224
42.20
1.17
0.55

ID
37.5
35.8
37.1
0.89
0.245
36.80
-1.11
-1.73

IU









J








•-
JE
36.9
37.7
37.2
0.40
0.115
37.27
-0.91
-1.53

JG









JM








#:
JN








•
JQ








•
JS
42.0
42.0
42.0
0.00
0.000
42.00
1.09
0.46

JX








•
JY
37.8
40.0
38.8
1.10
0.317
38:87
-0.23
-0.86

K
44.2
41.2
40.5
1.97
0.533
41.97
1.08
0.45

KB









KT









KX








m--
L
41.3
43.3
42.3
1.00
0.288
42.30
1.22
0.59

I.H?








»
LF
43.4
42.4
42.2
0.64
0.173
42.67
1.37
0.75

LL








w
LR








*
LT
35.1
30.1
35.9
3.14
0.836
33.70
-2.42
-3.04

M








•
mt








•
• a
No data submitted

TAG SYMBOLS

ft a Above control limit
0 =
^	
Insufficient data
x =
Determined to be an outlier
U 3 Below control limit
-------
27/30	CRD-LV Performance Evaluation: Blind-A, 15-Oct-1996
I	
Uranium (Natural)
Lab
Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known) Tag
MP







0
MV







9
MY







#
N







•
NA
40.0
40.0
40.0
0.00
0.000
40.00
0.24
-0.38
NH
47.6
48.6
47.5
0.61
0.158
47.90
3.58
2.96
NJ
40.4
41.5
43.7
1.68
0.475
41.87
1.03
0.41
NK
38.3
37.3
39.1
0.90
0.259
38.23
-0.50
-1.13
NO
38.4
40.4
41.9
1.76
0.504
40.23
0.34
-0.28
NT
35.4
37.1
38.9
1.75
0.504
37.13
-0.97
-1.59
O








OB
40.7
40.7
40.5
0.12
0.029
40.63
0.51
-0.11
OF







•
OM
31.7
31.6
32.0
0.21
0.058
31.77
-3.23
-3.86 JJ
OS
39.0
37.0
35.0
2.00
0.576
37.00
-1.02
-1.65
OX







•
OY







•
P
23,a
23.6
24;5
0.62
0.173
23.80
-6.60
-7.22 x
PA







*
PB
40.3
40.8
41.9
0.82
0.231
41.00
0.67
0.04
PG
36.8
36.3
32.6
2.29
0.605
35.23
-1.77
-2.39
PM







•
PQ







•
PH







•
PV
40.5
40.4
40.5
0.06
0.014
40.47
0.44
-0.18
PW
30.6
34.4
28.6
2.95
0.836
31.20
-3.47
-4.10 JJ
Q
35.7
35.3
34.0
0.89
0.245
35.00
-1.87
-2.49
QC







•
QM
50.5
49.9
49.9
0.35
0.086
50.10
4.51
3.89 11
QP







9
QQ
31.7
35.0
40.4
4.39
1.483
35.70
-1.57
-2.20
QT







*
QU
44.5
50.3
55.2
5.36
2.031
50.00
4.47
3.84 ft
QW







9
QX
13.9
10.9
11.3
1.63
0.432
12.03
-11.57
-12.19 x
QZ
40.2
40.0
40.1
0.10
0.029
40.10
0.29
-0.34
RD
42.1
43.2
42.8
0.56
0.158
42.70
1.39
0.76
RF
40.1
42.4
40.0
1.36
0.346
40.83
0.60
-0.03
RG
40.1
40.6
39.5
0.55
0.158
40.07
0.27
-0.35
RE







•
RK







•
RP








RR








RU








RZ
35.1
40.6
41.2
3.36
0.879
38.97
-0.19
-0.82
• s No data submitted	TAG SYMBOLS	ft s Above control limit
0 = Insufficient data	x = Determined to be an outlier	!!¦ = Below control limit
^	-v
-------
CRD-LV Performance Evaluation: Blind-A, 15-Oct-1996	28/30
/			
Uranium (Natural)
Lab
Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rnganfll
(R + SR)
Average
Normalized deviation
(grand-avg) (known) Tag
S
40.2
37.2
36.9
1.82
0.475
38.10
-0.56
-1.18

SC
44.6
40.3
42.4
2.15
0.619
42.43
1.27
0.65

SD
42.7
42.7
42.7
0.01
0.000
42.70
1.39
0.76

SF
42.1
41.6
42.5
0.45
0.130
42.07
1.12
0.49

8 G







»:
SI,
64 A
54.0
66.6
140
0.376
OOiUU
Si&ft
5i86
X
SL
29.0
32.0
30.0
1.53
0.432
30.33
-3.84
-4.46

SM
42.0
34.8
35.2
4.05
1.071
37.33
-0.88
-1.51

SN








•
SO
29.2
28.6
30.8
1.14
0.317
29.53
-4.18
-4.80

SR








•
SS
42.0
46.3
41.0
Z.S'^
0.764
43.10
1.55
0.93

' sx







<~
sz
39.0
39.0
38.0
0.58
0.144
38.67
-0.32
-0.94

T
42.0
41.2
43.1
0.95
0.274
42.10
1.13
0.51

TV







?
TG








*
TK









IE.








«
Tff








*
TQ
43.8
43.6
43.4
0.20
U.U5B
43.60
1.77
1.14

ra








•
TY








•
u
38.5
39.0
38.0
0.50
0.144
38.50
-0.39
-1.01

UA








•
UE
39.8
38.5
39.4
0.67
0.187
39.23
-0.08
-0.70

UK









UN
22ift
17.9
23.0
2.92
0.735
2127
-767
-829
n
UP
37.3
34.3
37.8
1.89
0.504
36.47
-1.25
-1.87

UQ








4
VA








•
VH
42.0
44.9
39.0
2.95
0.850
41.97
1.08
0.45

VI
37.1
33.4
35.7
1.87
0.533
35.40
-1.70
•2.32

VJ








*
VM








•
VO
42.8
39.7
39.4
1.88
0.490
40.63
0.51
-0.11

VT









w
40.4
38.7
40.5
1.01
0.259
39.87
0.19
-0.44

WE








*3
WH
39.1
42.7
41.6
1.84
0.519
41.13
0.72
0.10

WO

9
-------
29/30
CRD-LV Performance Evaluation: Blind-A, 15-Oct-1996
Uranium (Natural)
Lab Res. 1 Res. 2
Exper. Rng anal	Normalized deviation
Res- 3	Sigma (R + SR) Average (grand-avg) (known) Tag
XA
44.5
46.4
45.7
0.96
0.274
45.53
2.58
1.96
Data sorted by Laboratory Average
Average
Tag
Lab
Average
Tag
Lab
Average
Tae
Lab
10.33
X
CM
37.67

CJ
41.13

WH
12.03
X
QX
37.80

BH
41.33

AZ
21.27
X
UN
37.90

CS
41.47

HL
22.27
X
FJ
37.93

BO
41.87

NJ
23.80
X
P
38.07

E
41.97

VH
29.53
II
SO
38.10

S
41.97

K
30.33
u
SL
38.20

HP
42.00

JS
30.50

HK
38.20

EB
42.07

SF
31.20
a
PW
38.23

NK
42.10

T
31.63

AH
38.33

D
42.20

I
31.77

OM
38.50

U
42". 20

BM
31.93
u
CA
38.67

sz
42.30

L
32.50
u
DB
38.73

EL
42.43

SC
33.70
n
LT
38.87

JY
42.63

DE
34.80

BG
38.97

RZ
42.67

LF
34.87

BN
39.10

C
42.67

AW
35.00

Q
39.10

A
42.70

SD
35.23

PG
39.23

UE
42.70

RD
35.40

VI
39.50

BC
42.87

AL
35.70

QQ
39.53

BA
42.97

AP
36.17

CE
39.87

BG
43.10

SS
36.30

DZ
39.87

W
43.60

TQ
36.47

UP
40.00

NA
44.33

BG
36.73

GQ
40.07

RG
44.40

CG
36.77

BB
40.10

QZ
45.07

DT
36.80

ED
40.20

WR
45.40

AJ
37.00

OS
40.23

NO
45.53

XA
37.03

AR
40.47

PV
45.97

CX
37.13

NT
40.53

AE
47.90

NH
37.27

JE
40.63

VO
48.47
It
AF
37.30

ER
40.63

OB
50.00
IT
QU
37.33

SM
40.67

DI
50.10
IT
QM
37.47

AK
40.83

RF
55.00
X
SI
37.50

BK
41.00

PB
67.87
X
FZ
37.63

DO
41.00

FE
91.00
X
WO
• = No data submitted
0 = Insufficient data
TAG SYMBOLS
x = Determined to be an outlier
It s Above control limit
!]¦ ~ Below control limit
-------
=^v
CRD-LV Performance Evaluation: Blind-A, 15-Oct-1996	30/30
Uranium (Natural)
% responding labs	Frequency distribution
Blllflwll|wHlT-¦ -J-
+4	+6
Normalized deviation of the mean from the known value
% responding labs	Frequency distribution
10-—		5	
F	-*T	B^lll
-6	-4	-2	0	+2
Normalized deviation of the mean from the grand average
+4
-------
United States	Office of Research and	EPA/600/R-97/001B
Environmental Protection	Development	January 1997
Agency	Washington, DC 20460
v>EPA Blind-B Performance
Evaluation Study
A Statistical Evaluation of
the October 15, 1996 Data
002RSL97 COV
-------
Blind-B
Performance Evaluation Study
October 15, 1996
Environmental Protection Agency
National Exposure Research Laboratory
Characterization Research Division
Las Vegas, Nevada
-------
UNITED STATES ENVIRONMENTAL PROTECTION AGENCY
OFFICE OF RESEARCH AND DEVELOPMENT
NATIONAL EXPOSURE RESEARCH LABORATORY
CHARACTERIZATION RESEARCH DIVISION-LAS VEGAS
P.O. BOX 93478
LAS VEGAS, NEVADA 89193-3478
(702/798-2100)
Dear Participant,
Enclosed are the results of the Analytical Sciences Branch (CRD-LV)
Performance Evaluation Study for Bllnd-B; October 15, 1996.
The known value for each analysis was determined by gravimetric methods,
checked by chemical analyses performed by CRD-LV's Radiochemistry Laboratory,
and compared to the participating laboratories' grand average.
The expected precision, determined by the known value, was taken from
'Table 3. Laboratory Precision: One Standard Deviation Values and Control Limits
for Various Analyses", which is based on data accumulated over the years by the
Performance Evaluation Program, and can be found in the Environmental Radioactivity
Performance Evaluation Studies Program and Radioactive Standards Distribution
Program information brochure.
Please take a few minutes to review this report and the analytical data your
laboratory submitted to us. If there are any apparent discrepancies, please notify us
immediately.
We encourage you to make use of the computer-automated data-entry system
that has been in place for some time now. As the number of participants increases,
and it becomes unrealistic for us to receive results by mail or FAX, the computer
system will be our only avenue for accepting data.
If you have any questions or comments, please send a message via the data-entry
system or contact Stephen Pia at 702/798-2102 or Patricia Honsa at 702/798-2141.
Sincerely,
fl.
Stephen Pia
Team Leader
RADQA Program
Enclosure
-------
NOTICE
This material has been funded wholly by
the U.S. Environmental Protection Agency.
It has been subjected to the Agency's review,
and has been approved for publication as
an EPA document.
-------
(f
V.
r
CRD-LV Performance Evaluation: Blind-B, 15-Oct-1996
1/42
The following pages consist of separate sections for each of the nuclides in this study with four
parts per section. After the first, each part is separated from the next hv n new pa^e or a thick
horizontal bar. The first page of each section is a statistical summary for the nuclide and starts
with a statement of the known value, the control limits, and the warning limits.
The warning limits are placed at two normalized standard deviations above and below the
known value and the control limits are three normalized standard deviations above and below
the known value. If you keep control charts, these values will be useful for anticipating problems
with the accuracy of your analytical methods.
The coin shaped pie chart at the top of the summary page shows the fate of all the samples
sent out in number and percentage terms. The pie chart starts at the top and rotates clockwise.
The first sector represents those participants who submitted analytical results within both the
warning and control limits. The next sector represents those who are in the warning region but
not out of control. The third sector represents those who are out of control, but have passed
the outlier test. The fourth sector represents those who have failed the outlier test. The last
sector represents those participants who have failed to respond properly. This is the case if no
analytical results were returned, or less than three determinations were reported, or if the results
were received too late. The reeding on the edge of the coin is spaced at one percent intervals, and
the sector shading becomes darker as the data reliability decreases. Sectors with zero width are
not shown.
The table in the center shows a number of statistical quantities calculated from the submitted
data based on the mean and median values in relation to the known value, both before and after
outlier removal. The lower pie chart uses the same construction as the upper chart and shows
the distribution of properly submitted data in terms of deviation from the known value divided
into sectors representing one, two, three, and greater than three normalized standard deviations.
The second part is an alphabetical listing, in lab-code order, of submitted data and several
calculated quantities. An entry that is shaded has been rejected because of one of the reasons
listed above or failure of the outlier test. The fifth and sixth columns are a measure of laboratory
precision. The Range analysis is a normalized value that you may use to keep precision control
charts. The eighth and ninth columns are the differences from the mean of all non-outliers and
from the known value, respectively. If this value is between 2.0 and 3.0, your analytical process
precision is in the warning zone; if it exceeds 3.0. it is out of control. A tag symbol may appear in
the last column. Each page with tags has a symbol definition summary at the bottom. If there is
no tag symbol, the data is within the control limits, but it may be in the warning zone.
The third part is a three-column listing of result average, tag symbol, and lab-code in average
order excluding those labs not responding properly. In this order, all outliers and out-of-control
results appear at the top or bottom of the list.
The last part is two bar chart displays showing frequency distributions of responding
participants. The first chart places the known value at the center and a bar at each 0.2 unit of
expected precision. The second chart places the mean of the reported measurements at the center
and a bar at each 0.2 unit of standard deviation. In both cases, a bar includes those results within
0.1 unit up to the maximum of six. Any results more than six units from the center value are
shown cumulatively by a shaded bar one past the sixth unit. If the central tendency of the known
value distribution falls away from the center, an error in accuracy is indicated. If the distribution
is broad, poor precision is indicated. The mean value distribution is similar but uses the average
and standard deviation of reported results as its basis.
-------
2/42
CRD-LV Performance Evaluation: Blind-B, 15-Oct-199fl
The Range Analysis(R + SR) is calculated from the range, mean range and standard error of
the range values. The range is the difference between the maximum and minimum remiltn for the
laboratory. The mean range is calculated by multiplying the expected precision by 1.693(for three
results). The standard error of the range is calculated by multiplying the mean range by 2.575(for
three results), subtracting the mean range from this product, and dividing the result by 3. If the
range is greater than the mean range, then the range analysis is calculated by subtracting the
mean range from the range, dividing the result by the standard error of the range and adding 1.
If the mean range is greater than or equal to the range, then the range analysis is calculated by
dividing the range by the mean range.
The normalized deviation of the mean from the grand average is calculated from the deviation
of the mean from the grand average and the standard error of the mean values. The deviation of
the mean from the grand average is calculated by subtracting the grand average from the
average of the laboratory's three results. The standard error of the mean is calculated by
dividing the expected precision by the square root of 3(the number of results). The normalized
deviation of the mean from the grand average is calculated by dividing the deviation of the mean
from the grand average by the standard error of the mean.
The normalized deviation of the mean from the known value is calculated from the deviation of
the mean from the known value and the standard error of the mean values. The deviation of the
mean from the known value is calculated by subtracting the known value from the average of the
laboratory's three results. The standard error of the mean is calculated by dividing the expected
precision by the square root of 3(the number of results). The normalized deviation of the mean
from the known value is calculated by dividing the deviation of the mean from the known value by
the standard error of the mean.
A complete explanation of the statistical calculations involved in the report may be found in
the Environmental Radioactivity Performance Evaluation Studies Program information brochure
[Draft Revision of EPA-600/4-81-004], available from Patricia Honsa, CRD-LV, 702/798-2141.
-------
CRD-LV Performance Evaluation: Blind-B, 15-Oct-1996
3/42
Gross Beta	Statistical Summary	179 Participants
The known value of this nuclide is 111.8 pCi/1 with an expected precision of 16.8; the control limits
are 82.7 to 140.9; the warning regions are 82.7 to 92.4 and 131.2 to 140.9
40(22.3 %) Failed to respond •»
. 114(63.7 %) Within all limits

11 (8.1 %) Outliers '* / \K.
•••, V

3( 1.7 %) Out of control •

11 (6.1 %) In warning zone
but not an outlier
|
11
but within control
Statistic
Respondents
Non-outliers
Mean
112.09
Grand Avg 107.72
Std. Dev.
36.53
10.98
Variance
1334.18
120.48
% Coef. of Var.
32.59
10.19
% deviation of mean from known value
0.26
-3.65
Norm. dev. of mean from known value
0.01
-0.37
Median
107.33
107.13
% deviation of median from known value
-4.00
-4.17
Norm. dev. of median from known value
-0.12
-0.43
14(10.1 %) More than 3 norm. S.D.
111 (7.9 %) Between 2 and 3 norm. S.D.
81(58.3 %) Within 1 norm. S.D.
of known value
33(23.7 %) Between 1 and 2 norm. S.D.
-------
4/42
r —

CRD-LV Performance Evaluation: Blind-B, 15-Oct-1996


Gross Beta








Lab
Res. 1
Res. 2
Res. 3
Exper.
Rng anal

Normalized deviation

Sigma
(R + SR)
Average
fgrand-avg)
(known) Tae
A
107.8
103.2
105.8
2.31
0.162
105.60
-0.22
-0.64

AE
88.6
88.6
88.0
0.34
0.021
88.40
-1.99
-2.41

AF
114.0
108.6
111.0
2.71
0.190
111.20
0.36
-0.06

AH
109.0
113.0
116.0
3.51
0.246
112.67
0.51
0.09

AJ
88.7
89.4
80.2
5.12
0.323
86.10
-2.23
-2.65

AK
101.7
102.8
104.9
1.63
0.113
103.13
-0.47
-0.89

AL
105.2
103.0
109.2
3.14
0.218
105.80
-0.20
-0.62

AP
108.4
111.2
110.8
1.51
0.098
110.13
0.25
-0.17

AR
103.0
108.0
106.0
2.52
0.176
105.67
-0.21
-0.63

AU
113.0
112.0
110.0
1.53
0.105
111.67
0.41
-0.01

AW
98.3
98.9
97.6
0.65
0.046
98.27
-0.97
-1.40

AZ
97.0
98.7
98.6
0.95
0.060
98.10
-0.99
-1.41

BA
115.2
119.9
116.5
2.43
0.165
117.20
0.98
0.56

BB
105.0
105.6
107.4
1.25
0.084
106.00
-0.18
-0.60

BC
107.9
107.4
107.2
0.36
0.025
107.50
-0.02
-0.44

BG
123.0
122.0
110.0
7.23
0.457
118.33
1.09
0.67

BH
99.0
101.3
101.8
1.49
0.098
100.70
-0.72
-1.14

BK
113.0
110.0
110.0
1.73
0.105
111.00
0.34
-0.08

BL








*<
BM
116.8
113.0
115.8
1.97
0.134
115.20
0.77
0.35

BN









BO
103.0
108.0
103.0
2.89
0.176
104.67
-0.31
-0.74

BS
114.5
116.0
111.1
2.51
0.172
11.3.87
0.63
0.21

BW









C
103.3
104.6
107.3
2.04
0.141
105.07
-0.27
-0.69

CA
92.0
105.6
100.7
6.89
0.478
99.43
-0.85
-1.27

CE
113.6
113.9
109.8
2.29
0.144
112.43
0.49
0.07

CG
109.0
103.2
104.8
3.00
0.204
105.67
-0.21
-0.63

CJ
110.0
110.0
110.0
0.00
0.000
110.00
0.23
-0.19

CM








to
CO








•:
cs
104.0
105.0
112.0
4.36
0.281
107.00
-0.07
-0.49

cx
101.0
90.6
109.0
9.23
0.647
100.20
-0.78
-1.20

D
113.2
110.7
109.9
1.72
0.116
111.27
0.37
-0.05

DB
100.0
102.0
103.0
1.53
0.105
101.67
-0.62
-1.04

DD
75.8
82.4
82.1
3.73
0.232
80.10
-2.85
-3.27

DE
104.7
104.8
104.9
0.10
0.007
104.80
-0.30
-0.72

DI








••
DO









DS
101.0
104.0
103.0
1.53
0.105
102.67
-0.52
-0.94

DT
119.6
119.4
111.9
4.39
0.271
116.97
0.95
0.53

DZ
85.0
88.2
81.0
3.61
0.253
84.73
-2.37
-2.79

E
113.3
111.1
109.3
2.00
0.141
111.23
0.36
-0.06

EB
110.9
116.5
116.8
3.32
0.207
114.73
0.72
0.30

EL








•
• = No data submitted	TAG SYMBOLS	1! = Above control limit
0 s Insufficient data	- x = Determined to be an outlier	U 3 Below control limit
1"	¦¦ ' ¦	¦¦ ' 				- - —	. . I, ... — 1 yj
-------
	
CRD-LV Performance Evaluation: Blind-B, 15-Oct-1996	5/42
Gross Beta
Lab Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known) Tae
EO
113.0
106.0
108.0
3.61
0.246
109.00
0.13
-0.29
ER







•
EV
126.1
152.5
110.4
21.28
1.915
129.67
2.26
1.84
EX
113.1
109.6
111.4
1.75
0.123
111.37
0.38
-0.04
FE







#
FF







•
FJ
110.8
121.3
109.4
6.50
0.418
113.83
0.63
0.21
FL
94.5
94.1
91.2
1.80
0.116
93.27
-1.49
-1.91
FN








FZ
102.3
113.2
100.1
7.01
0.461
105.20
-0.26
-0.68
GI







>
GQ
108.0
106.0
107.0
1.00
0.070
107.00
-U.U7
-0.49
GT
92.0
101.9
103.3
6.16
0.397
99.07
-0.89
-1.31
GZ
160;7
158;2
152.2
3,97
0.264
153,70
4.74
4:32 X
HI
98.8
98.5
101.5
1.65
0.105
99.60
-0.84
-1.26
HK
117.0
116.1
116.1
0.52
0.032
116.40
0.89
0.47
HL
111.0
104.7
107.9
3.15
0.222
107.87
0.01
-0.41
HP
99.8
108.0
95.3
6.44
0.447
101.03
-0.69
-1.11
HX







•
I
102.4
94.2
99.3
4.14
0.288
98.63
-0.94
-1.36
ID
96.7
98.9
107.3
5.59
0.373
100.97
-0.70
-1.12
IU








J







•
JE
119.6
121.9
118.0
1.96
0.137
119.83
1.25
0.83
JG
125.4
123.9
121.4
2.02
0.141
123.57
1.63
1.21
JM
110.0
106.0
112.0
3.06
0.211
109.33
0.17
-0.25
JN
94.9
96.0
94.0
1.00
0.070
94.97
-1.32
-1.74
JQ
137.4
139.0
136.8
1.14
0.077
137.73
3.09
2.67
J8
146.0
,16310
142.0
5.57
0.387
i4700
4,06
3.63 *
JX







•
JY
98.1
100.0
98.2
1.07
0.067
98.77
-0.92
-1.34
K
73.5
78.7
71.6
3.68
0.250
74.60
-3.41
-3.84 U
KEi
428.4
425i?
426;8
1.53
0.095
426.63
32.88
32.46 x
KT







•
KX
133.0
121.0
118.0
7.94
0.527
124.00
1.68
1.26
L
132.1
131.9
130.5
0.87
0.056
131.50
2.45
2.03
LE
121.7
131.0
122.1
5.26
0.327
124.93
1.77
1.35
LF
100.0
110.0
110.0
5.77
0.352
106.67
-0.11
-0.53
LL
138.7
118.5
125.6
10.25
0.710
127.60
2.05
1.63
LR
134.0
125.0
140.0
7.55
0.527
133.00
2.61
2.19
LT
28.4
4113
402
715
0.454
36;63
•7:33
-776 x
M
138.0
130.0
137.0
4.36
0.281
135.00
2.81
2.39
MF
116.0
113.0
114.0
1.53
0.105
114.33
0.68
0.26
MP








MV
96.0
96.0
94.0
1.15
0.070
95.33
-1.28
-1.70
• 3
0 3
No data submitted
Insufficient data
X s
TAG SYMBOLS
Determined to be an outlier
ft $ Above control limit
U i^.iBjjlow control limit
-------
ft 	
6/42
CRD-LV Performance Evaluation: Blind-B, 15-Oct-1996

	
Gross Beta








Lab
Res. 1
Res. 2

Exper.
Rng anal

Normalized deviation

Res. 3
Sigma
(R + SR)
Average
(grand-avg)
(known) Tag
MY








+ -
N:








•
NA
130.0
130.0
135.0
2.89
0.176
131.67
2.47
2.05
NH
95.0
106.0
114.0
9.54
0.668
105.00
-0.28
-0.70

NJ
114.9
113.8
100.5
8.02
0.506
109.73
0.21
-0.21

NK
103.9
103.5
103.6
0.21
0.014
103.67
-0.42
-0.84

NO
103.0
105.0
107.0
2.00
0.141
105.00
-0.28
-0.70

NT
108.2
107.2
106.2
1.00
0.070
107.20
-0.05
-0.47

0
117.3
119.1
116.0
1.56
0.109
117.47
1.00
0.58

OB
112.5
96.9
98.6
8.56
0.548
102.67
-0.52
-0.94

OF
83.0
82.0
75.0
4.36
0.281
80.00
-2.86
-3.28

OM








• ¦
OS
104.0
103.0
111.0
4.36
0.281
106.00
-0.18
-0.60

OX
116.2
109.9
111.2
3.33
0.222
112.43
0.49
0.07

OY








• -
P
117.0
128.9
117.3
6.79
0.418
121.07
1.38
0.96

PA








•
PB
110.9
112.4
111.7
0.75
0.053
111.67
0.41
-0.01

PG
101.9
103.8
101.2
1.35
0.091
102.30
-0.56
-0.98

PM
113.0
112.4
113.4
0.50
0.035
112.93
0.54
0.12

PQ








•
PR
88.5
87.9
87.0
0.76
0.053
87.80
-2.05
-2.47

PV
105.1
110.5
103.1
3.83
0.260
106.23
-0.15
-0.57

PW








•
Q
111.2
113.9
115.5
2.17
0.151
113.53
0.60
0.18

QC








•
QM
116.2
114.5
101.5
8.04
0.517
110.73
0.31
-0.11

QP








•
QQ
111.9
110.0
111.6
1.02
0.067
111.17
0.36
-0.07

QT
92.4
95.4
95.0
1.63
0.105
94.27
-1.39
-1.81

QU
86.6
100.0
101.4
8.17
0.520
96.00
-1.21
-1.63

QW
105.4
104.3
94.0
6.29
0.401
101.23
-0.67
-1.09

QX
54;2
546
543
0:21
0.014
54.37
-5.50
-5.92
X
QZ
118.0
120.0
121.0
1.53
0.105
119.67
1.23
0.81

RD
114.1
114.6
114.2
0.27
0.018
114.30
0.68
0.26

RF
98.1
100.9
121.1
12.55
0.809
106.70
-0.11
-0.53

RG
108.0
108.0
109.0
0.58
0.035
108.33
0.06
-0.36

RI
114.5
117.9
114.2
2.05
0.130
115.53
0.81
0.38

RK








•
RP








•
RR
98.0
103.0
94.0
4.51
0.316
98.33
-0.97
-1.39

RU








• .
RZ
106.1
109.2
105.9
1.85
0.116
107.07
-0.07
-0.49

S
119.4
119.8
120.7
0.67
0.046
119.97
1.26
0.84

sc
112.9
106.6
106.1
3.79
0.239
108.53
0.08
-0.34

• =
No data submitted

TAG SYMBOLS

tt = Above control limit
0 a
—
Insufficient data
;':k s
Determined to be an outlier
11 = Below control limit
			1	
-------
CRD-LV Performance Evaluation: Blind-B, 15-Oct-1996	7/42
Gross Beta
Lab Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known) Tag
SD
115.7
113.6
118.8
2.62
0.183
116.03
0.86
0.44
SF
110.0
110.0
110.0
0.00
0.000
110.00
0.23
-0.19
SO
193.7
189&4
i86.8
3.48
0.243
189.97
8.48
8.06 x
SI
90.0
90.9
91.8
0.90
0.063
90.90
-1.73
-2.15
SL
107.0
110.0
111.0
2.08
0.141
109.33
0.17
-0.25
SM
46.3
44.2
40.8
2.35
0.168
4343
-6.63
-7.05 x
SN
112.0
116.0
116.0
2.31
0.141
114.67
0.72
0.30
SO
105.4
102.5
104.1
1.45
0.102
104.00
-0.38
-0.80
SR
97.9
97.1
89.3
4.75
0.302
94.77
-1.34
-1.76
ss
100.0
101.1
96.6
2.35
0.158
99.23
-0.88
-1.30
sx
130.0
121.0
127.0
4.58
0.316
126.00
1.88
1.46
sz
100.2
100.8
104.2
2.16
0.141
101.73
-0.62
-1.04
T
105.7
116.6
103.6
6.98
0.467
108.63
0.09
-0.33
TD







•
TG
2544
274.0
275.1
11:05
0.728
287.83
16151
16.09 x
TH
110.0
100.0
110.0
5.77
0.352
106.67
-0.11
-0.53
TL







K
TN
119.0
112.1
111.3
4.23
0.271
114.13
0.66
0.24
TQ
119.0
117.0
114.0
2.52
0.176
116.67
0.92
0.50
TS







•
TY
110.0
109.0
111.0
1.00
0.070
110.00
0.23
-0.19
U
108.0
102.0
105.0
3.00
0.211
105.00
-0.28
-0.70
UA
106.0
106.0
106.0
0.00
0.000
106.00
-0.18
-0.60
UE
124.0
128.0
119.0
4.51
0.316
123.67
1.64
1.22
UK







•
UN
117.0
107.0
115.0
5.29
0.352
113.00
0.54
0.12
UP
100.5
98.6
94.9
2.85
0.197
98.00
-1.00
-1.42
UQ
109.0
109.0
106.0
1.73
0.105
108.00
0.03
-0.39
VA
91.9
95.0
86.7
4.19
0.292
91.20
-1.70
-2.12
VH
124.6
106.2
117.5
9.28
0.647
116.10
0.86
0.44
VI
98.1
94.9
95.3
1.74
0.113
96.10
-1.20
-1.62
VJ
203.0
212.0
200.0
6.24
0.422
205.00
10.03
9,61 X
VM







9
VO
97.0
94.9
102.0
3.65
0.250
97.97
-1.01
-1.43
VT







»
W
109.0
106.0
107.0
1.53
0.105
107.33
-0.04
-0.46
WE
108.5
100.3
104.2
4.10
0.288
104.33
-0.35
-0.77
WH
60:5
61.5
59.6
0.95
0.067
60.63
-4.87
•5.29 X
WO
216.0
197.0
210.0
9.71
0.668
207.67
10.30
9i8fl K'
WR
100.5
101.1
102.8
1.19
0.081
101.47
-0.64
-1.07
WW








WY







•
X
101.7
103.7
112.6
5.80
0.383
106.00
-0.18
-0.60
XA







•
• =
L03
No data submitted
Insufficient data
x =
TAG SYMBOLS
Determined to be an outlier
ft 3 Above control limit
11 s Below control limit
-------
((	:	








8/42
CRD-LV Performance Evaluation: Blind-B,
15-Oct-1996


f
Gross Beta







'V


Data sorted by Laboratory Averng
re


Average
Tag
Lab
Average
Tag
Lab
Average
Tag
Lab
36.63
X
LT
104.00

SO
111.23

E
43.43
X
SM
104.33

WE
111.27

D
54.37
X
QX
104.67

BO
111.37

EX
60.53
X
WH
104.80

DE
111.67

PB
74.60

K
105.00

U
111.67

AU
80.00
a
OF
105.00

NO
112.43

OX
80.10
a
DD
105.00

NH
112.43

CE
84.73

DZ
105.07

C
112.67

AH
86.10

AJ
105.20

FZ
112.93

PM
87.80

PR
105.60

A
113.00

UN
88.40

AE
105.67

CG
113.53

Q
90.90

SI
105.67

AR
113.83

FJ
91.20

VA
105.80

AL
113.87

BS
93.27

FL
106.00

X
114.13

TN
94.27

QT
106.00

UA
114.30

RD
94.77

SR
106.00

OS
114.33

MF
94.97

JN
106.00

BB
114.67

SN
95.33

MV
106.23

PV
114.73

EB
96.00

QU
106.67

TH
115.20

BM
96.10

VI
106.67

LF
115.53

RI
97.97

VO
106.70

RF
116.03

SD
98.00

UP
107.00

GQ
116.10

VH
98.10

AZ
107.00

CS
116.40

HK
98.27

AW
107.07

RZ
116.67

TQ
98.33

RR
107.20

NT
116.97

DT
98.63

I
107.33

W
117.20

BA
98.77

JY
107.50

BC
117.47

O
99.07

GT
107.87

HL
118.33

BG
99.23

SS
108.00

UQ
119.67

QZ
99.43

CA
108.33

RG
119.83

JE
99.60

HI
108.53

SC
119.97

S
100.20

CX
108.63

T
121.07

P
100.70

BH
109.00

EO
123.57

JG
100.97

ID
109.33

SL
123.67

UE
101.03

HP
109.33

JM
124.00

KX
101.23

QW
109.73

NJ
124.93

LE
101.47

WR
110.00

TY
126.00

sx
101.67

DB
110.00

SF
127.60

LL
101.73

sz
110.00

CJ
129.67

EV
102.30

PG
110.13

AP
131.50

L
102.67

OB
110.73

QM
131.67

NA
102.67

DS
111.00

BK
133.00

LR
103.13

AK
111.17

QQ
135.00

M
103.67

NK
111.20

AF
137.73

JQ
• s No data submitted

TAG SYMBOLS

ir s
Above control limit
0 s Insufficient data
V-	

x = Determined to be an outlier

Below control limit
-------
	
Gross Beta
CRD-LV Performance Evaluation: Blind-B, 15*Oct-1996
9/42
Average
Tag
Data sorted by Laboratory Average
Lab Average	Tag	Lab
Average
Tag
Lab
147.00
153.70
x
x
JS
GZ
189.97
205.00
x
x
SG
VJ
207.67
267.83
426.63
x
x
X
WO
TG
KE
% responding labs
Frequency distribution
10-
0-U^-
T

Ill-lB,

T
% responding labs
-4	-2	0	+2	+4
Normalized deviation of the mean from the known value
Frequency distribution
+6
10-
- .¦ "f
m

~T
2	0	+2	+4
Normalized deviation of the mean from the grand average
+4
• 3 No data submitted
0 s Insufficient data
TAG SYMBOLS
x s Determined to be an outlier
ft 3 Above control limit
¦U 3 Below control limjt
-------
CRD-LV Performance Evaluation: Blind-B, 15-Oct-1996
10/42
Strontium-89
Statistical Summary	179 Participants
The known value of this nuclide is 10.0 pCi/1 with an expected precision of 5.0; the control limits
are 1.3 to 18.7; the warning regions are 1.3 to 4.2 and 15.8 to 18.7
112(62.6 %) Failed to respond ,
5(2.8 %) Outliers
Statistic
, 56(31.3 %) Within all limits
Respondents
*• 6(3.4 %) In warning zone
but within control
Non-outliers
Mean
Std. Dev.
Variance
% Coef. of Var.
% deviation of mean from known value
Norm. dev. of mean from known value
Median
% deviation of median from known value
Norm. dev. of median from known value
31.36
164.84
27173.67
525.60
213.63
0.13
10.67
6.67
0.00
Grand Avg 10.36
3.27
10.68
31.54
3.60
0.11
10.33
3.33
0.10
5(7.5 %) More than 3 norm. S.D. »»
6(9.0 %) Between 2 and 3 norm. S.D.
,37(55.2 %) Within 1 norm. S.D.
of known value
* 19(28.4 %) Between 1 and 2 norm. S.D.
-------
	
11/
42
CRD-LV Performance Evaluation: Blind-B, 15-Oct-1996

	^
Stronti um-89








Lab
Res. 1
Res. 2

Exper.
Rng anal

Normalized deviation

Res. 3
Sigma
(R + SR)
Average
(grand-avg)
(known) Tag
A
8.0
10.0
11.0
1.53
0.354
9.67
-0.24
-0.12

AE
6.0
7.0
8.0
1.00
0.236
7.00
-1.16
-1.04

AF








AH








•
AJ
12.0
9.0
20.0
5.69
1.570
13.67
1.15
1.27

AK
12.0
11.0
13.0
1.00
0.236
12.00
0.57
0.69

AL
11.0
13.0
13.0
1.15
0.236
12.33
0.68
0.81

AP








• -
AR








•
AU
17.0
15.0
16.0
1.00
0.236
16.00
1.95
2.08

AW
11.0
11.0
11.0
0.00
0.000
11.00
0.22
0.35

AZ
7.0
9.0
11.0
2.00
0.473
9.00
-0.47
-0.35

BA
15.0
16.0
11.0
2.65
0.591
14.00
1.26
1.39

BB








•
BC
6.0
7.0
6.0
0.58
0.118
fi.33
-1.30
-1.27

BO








•
BH








•
BK









BL
8.0
8.0
12.0
2.31
0.473
9.33
-0.36
-0.23

BM
13.0
13.0
13.0
0.00
0.000
13.00
0.91
1.04

BN








9
BO
11.0
9.0
11.0
1.15
0.236
10.33
-0.01
0.12

BS








' •
BW








• '
C
10.0
11.0
12.0
1.00
0.236
11.00
0.22
0.35

CA
7.0
8.0
6.0
1.00
0.236
7.00
-1.16
-1.04

CE








9
CG
6.0
6.0
6.0
0.00
0.000
6.00
-1.51
-1.39

CJ
9.0
9.0
9.0
0.00
0.000
9.00
-0.47
-0.35

CM








•
CO








•
CS
2.0
7.0
15.0
6.56
2.020
8.00
-0.82
-0.69

CX
10.0
12.0
12.0
1.15
0.236
11.33
0.34
0.46

D
14.0
11.0
12.0
1.53
0.354
12.33
0.68
0.81

DB








• :
DD
1360.0
1370 0
1350.0
10.00
3.596
1360.00
467.53
467.66
X
DE
11.0
11.0
12.0
0.58
0.118
11.33
0.34
0.46

DI








*
DO
16.0
12.0
11.0
2.65
0.591
13.00
0.91
1.04

DS









DT
11.0
9.0
9.0
1.15
0.236
9.67
-0.24
-0.12

DZ
14.0
11.0
12.0
1.53
0.354
12.33
0.68
0.81

E
9.0
10.0
13.0
2.08
0.473
10.67
0.11
0.23

EB
3.0
4.0
3.0
0.58
0.118
3.33
-2.43
-2.31

EL
11.0
11.0
13.0
1.15
0.236
11.67
0.45
0.58

• =
No data submitted

TAG SYMBOLS

ft = Above control limit
[0-
Insufficient data
x =
Determined to be an outlier
U = Below control limit
	4/
-------


CRD-LV Performance Evaluation: Blind-B, 15-Oct-1996
12/42
Strontium-89







Lab
Res. 1
Res. 2

Exper.
Rng anal

Normalized deviation
Res. 3
Sigma
(R + SR)
Average
(grand-avg)
(known) Tag
EO







•
ER








EV







+
EX







•
FE








FF







>
FJ








FL








FN







•
FZ
14.0
10.0
19.0
4.51
1.120
14.33
1.38
1.50
GI








GQ
9.0
9.0
9.0
0.00
0.000
9.00
-0.47
-0.35
GT







•
QZ







•
HI







*
HK
10.0
9.0
9.0
0.58
0.118
9.33
-0.36
-0.23
HL







•
HP
Fnr
3.0
5.0
9.0
3.06
0.709
5.67
-1.63
-1.50
I
16.0
13.0
16.0
1.73
0.354
15.00
1.61
•<
1.73
m








IU








J







' •,
JE








JG








JM







^ •
JN








JQ








JS







*
JX








JY
11.0
18.0
11.0
4.04
0.827
13.33
1.03
1.15
K
6.0
3.0
6.0
1.73
0.354
5.00
-1.86
-1.73
KE







•
KT







•
KX
18.0
16.0
16.0
1.15
0.236
16.67
2.18
2.31
L
15.0
11.0
12.0
2.08
0.473
12.67
0.80
0.92
LE
8.0
7.0
8.0
0.58
0.118
7.67
-0.93
-0.81
LF
21.0
19.0
14.0
3.61
0.827
18.00
2.65
2.77
LL








LB







».
LT
10.0
10.0
11.0
0.58
0.118
10.33
-0.01
0.12
M
24,0
26.0
28.0
2.00
0.473
26,00
5l42
5.64 X
MF







>
MP








MV







•
• =
No data submitted

TAG SYMBOLS

IT s Above control limit
l0s
Insufficient data Tn-m>
ri tiXiF
.Determined to be an outlier
•Ujis Below control limit
-------
6	
13/
42
CRD-LV Performance Evaluation: Blind-B, 15-Oct-1996
	^
Strontium-8 9





\
Lab
Res. 1
Res. 2

Exper. Rng anal

Normalized deviation
Res. 3
Sigma (R + SR)
Average
(grand-avg)
(known) Tag
MY






•
N-






•
NA







NH






• -
NJ
10.0
10.0
10.0
0.00 0.000
10.00
-0.12
0.00
NK.






•
NO






•.
NT
4.0
4.0
4.0
0.00 0.000
4.00
-2.20
-2.08
O







OB







OF






•
OM







OS







OX






9
OY






m
P






•:
PA







PB
9.0
10.0
10.0
0.58 0.118
9.67
-0.24
-0.12
PG






•
PM







PQ






•
PR







PV

Z5;0
1B.0
3.00 01709
22.00
403
4.15 x
PW







Q
10.0
11.0
18.0
4.36 0.945
13.00
0.91
1.04
QC






*
QM
10.0
11.0
14.0
2.08 0.473
11.67
0.45
0.58
QP







QQ







QT






*
QU
26.0
26.0
25.0
0.58 0.118
25.33
5,19
5.31 x
QW
25.0
27.0
25.0
1.15 0.236
25.67
5.30
5.43 x
QX






•
QZ
16.0
18.0
16.0
1.15 0.236
16.67
2.18
2.31
RD






•
RF






•
RG






•
RI







RK







RP






*
RR







RU







RZ






*
S
8.0
8.0
9.0
0.58 0.118.
8.33
-0.70
-0.58
sc
7.0
8.0
8.0
0.58 0.118
7.67
-0.93
-0.81
• =
No data submitted

TAG SYMBOLS

IT s Above control limit
y*
Insufficient data
x!M£Determined to be an outlier
JJ. = Below control limit
	0
-------
	







	^
V

CRD-LV Performance Evaluation: Blind-B, 15-Oct-1996
14/42
~
Stronti um-89






1
Lab



Exper.
Rng anal

Normalized deviation
Res. 1
Res. 2
Res. 3
Sigma
(R + SR)
Average
(grand-avg)
(known) Tag
SD
8.0
11.0
10.0
1.53
0.354
9.67
-0.24
-0.12
SF
11.0
11.0
11.0
0.00
0.000
11.00
0.22
0.35
SO








SI
15.0
15.0
15.0
0.00
0.000
15.00
1.61
1.73
SL








SM
13.0
11.0
11.0
1.15
0.236
11.67
0.45
0.58
SN







»
SO







•
SR







•
ss
6.0
6.0
5.0
0.58
0.118
5.67
-1.63
-1.50
sx








sz
6.0
8.0
11.0
2.52
0.591
8.33
-0.70
-0.58
T
9.0
8.0
10.0
1.00
0.236
9.00
-0.47
-0.35
TD







•
TG







•
TH








TL








TN







•M
TQ
8.0
7.0
8.0
0.5ft
0.118
7.67
-0.93
-0.81
TS







¦
TY







•
U
3.0
7.0
6.0
2.08
0.473
5.33
-1.74
-1.62
UA







•
UE
6.0
6.0
8.0
1.15
0.236
6.67
-1.28
-1.15
UK







•
UK







•
UP
7.0
8.0
7.0
0.58
0.118
7.33
-1.05
-0.92
UQ







#
VA







«.
VH
11.0
11.0
9.0
1.15
0.236
10.33
-0.01
0.12
VI
12.0
16.0
18.0
3.06
0.709
15.33
1.72
1.85
VJ








VM








VO








VT








W
10.0
11.0
10.0
0.58
0.118
10.33
-0.01
0.12
WK








WH







>
WO







•
WR







>
WW








WY








X
12.0
8.0
12.0
2.31
0.473
10.67
0.11
0.23
XA








• s
No data submitted

TAG SYMBOLS

It = Above control limjt _

Insufficient data
x =
Determined to be an outlier
<11 = Below control lim# J
-------
(r
15142
CRD-LV Performance Evaluation: Blind-B, 15-Oct-1996
Strontium-89
Data sorted by
Average
Tag
Lab
Average
Tag
Lab
Average
Tag
Lab
3.33

EB
9.33

HK
12.33

DZ
4.00

NT
9.33

BL
12.33

D
5.00

K
9.67

SD
12.33

AL
5.33

U
9.67

PB
12.67

L
5.67

ss
9.67

DT
13.00

Q
5.67

HP
9.67

A
13.00

DO
6.00

CG
10.00

NJ
13.00

BM
6.33

BC
10.33

W
13.33

JY
6.67

UE
10.33

VH
13.67

AJ
7.00

CA
10.33

LT
14.00

BA
7.00

AE
10.33

BO
14.33

FZ
7.33

UP
10.67

X
15.00

SI
7.67

TQ
10.67

E
15.00

I
7.67

SC
11.00

SF
15.33

VI
7.67

LE
11.00

C
16.00

AU
8.00

CS
11.00

AW
16.67

QZ
8.33

SZ
11.33

DE
16.67

KX
8.33

S
11.33

CX
18.00

LF
9.00

T
11.67

SM
22.00
X
PV
9.00

GQ
11.67

QM
25.33
X
QU
9.00

CJ
11.67

El
25.67
X
QW
9.00

AZ
12.00

AK
26.00
1360.00
X
X
M
DD
% responding labs
104		
Frequency distribution
0—r
-6
T

y " -
-2	0	+2
Normalized deviation of the mean from the known value
+6
% responding labs	Frequency distribution
10-
, ,	,	,
¦i.ifl HHILf. 	,	^
-6	-4	-2	0+2+4	+6
Normalized deviation of the mean from the grand average
• = No data submitted TAG SYMBOLS ft s Above control limit
^g^jnauglcien^data^	,x = Determined_to_be aiyoaibHer	U^jBelow^controHim
-------
CRD-LV Performance Evaluation: Blind-B, 15-Oct-1996
16/42
Strontium-90	Statistical Summary	179 Participants
The known value of this nuclide is 25.0 pCi/1 with an expected precision of 5.0; the control limits
are 16.3 to 33.7; the warning regions are 16.3 to 19.2 and 30.8 to 33.7
103(57.5 %) Failed to respond.
1 (0.6 %) Outliers
2(1.1 %) Out of control
but not an outlier
Statistic
. 67(37.4 %) Within all limits
Respondents
*• 6(3.4 %) In warning zone
but within control
Non-outliers
Mean
Std. Dev.
Variance
% Coef. of Var.
% deviation of mean from known value
Norm. dev. of mean from known value
Median
% deviation of median from known value
Norm. dev. of median from known value
54.60
269.54
72652.69
493.66
118.40
0.11
23.67
-5.33
0.00
Grand Avg 23.68
3.17
10.06
13.39
-5.26
-0.41
23.67
-5.33
-0.42
3(3.9 %) More than 3 norm. S.D.
6(7.9 %) Between 2 and 3 norm
45(59.2 %) Within 1 norm. S.D.
of known value
S.D.
-------
(C	*—
17/42
CRD-LV Performance Evaluation: Blind-B, 15-Oct-1996

	^
Stronti um-90







•<
Lab
Res. 1
Res. 2

Exper.
Rng anal

Normalized deviation

Res. 3
Sigma
(R + SR)
Average
(grand-avg)
(known) Tag
A
23.0
22.0
24.0
1.00
0.236
23.00
-0.24
-0.69

AE
24.0
24.0
25.0
0.58
0.118
24.33
0.22
-0.23

AF
22.0
23.0
23.0
0.58
0.118
22.67
-0.35
-0.81

AH








• '
AJ
22.0
23.0
20.0
1.53
0.354
21.67
-0.70
-1.15

AK
21.0
23.0
21.0
1.15
0.236
21.67
-0.70
-1.15

AL
23.0
23.0
22.0
0.58
0.118
22.67
-0.35
-0.81

AP









AR








| •
AU
19.0
25.0
22.0
3.00
0.709
22.00
-0.58
-1.04

AW
25.0
25.0
25.0
0.00
0.000
25.00
0.46
0.00

AZ
27.0
27.0
26.0
0.58
0.118
26.67
1.03
0.58

BA
21.0
21.0
22.0
0.58
0.118
21.33
-0.81
-1.27

BB
25.0
26.0
24.0
1.00
0.236
25.00
0.46
0.00

BC
21.0
21.0
21.0
0.00
0.000
21.00
-0.93
-1.39

BG
32.0
32.0
30.0
1.15
0.236
31.33
2.65
2.19

BH








•
BK








- •
BL
26.0
26.0
23.0
1.73
0.354
25.00
0.46
0.00

BM
22.0
23.0
24.0
1.00
0.236
23.00
-0.24
-0.69

BN








•
BO
23.0
24.0
24.0
0.58
0.118
23.67
-0.01
-0.46

BS








•
BW








•
C
24.0
26.0
28.0
2.00
0.473
26.00
0.80
0.35

CA
23.0
25.0
23.0
1.15
0.236
23.67
-0.01
-0.46

CE
25.0
23.0
24.0
1.00
0.236
24.00
0.11
-0.35

CG
31.0
30.0
33.0
1.53
0.354
31.33
2.65
2.19

CJ
25.0
27.0
26.0
1.00
0.236
26.00
0.80
0.35

CM








»'
CO








%
CS
29.0
29.0
28.0
0.58
0.118
28.67
1.73
1.27

CX
25.0
24.0
27.0
1.53
0.354
25.33
0.57
0.12

D
25.0
24.0
23.0
1.00
0.236
24.00
0.11
-0.35

DB








• •
DD
2340.0
2320.0
2460.0
76.72
30.598
2373.33
813.94
813.49
X
DE
22.0
22.0
22.0
0.00
0.000
22.00
-0.58
-1.04

DI








•
DO
21.0
23.0
24.0
1.53
0.354
22.67
-0.35
-0.81

DS








•
DT
20.0
23.0
20.0
1.73
0.354
21.00
-0.93
-1.39

DZ
27.0
28.0
29.0
1.00
0.236
28.00
1.49
1.04

E
27.0
27.0
26.0
0.58
0.118
26.67
1.03
0.58

EB
24.0
25.0
26.0
1.00
0.236
25.00
0.46
0.00

EL
23.0
23.0
23.0
0.00
0.000
23.00
-0.24
-0.69

• ~
No data submitted

TAG SYMBOLS

1? s Above control limit
hi
5)
—i
Insufficient data
x «
'Determined to be an outlier
= Below control limit
	—	'J
-------
(r
CRD-LV Performance Evaluation: Blind-B, 15-Oct-1996
18/42
Strontium-90
Lab Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known) Tag
KO








ER







•
EV








EX








FE








FF








FJ







•
FL







~
FN








FZ
27.0
28.0
26.0
1.00
0.236
27.00
1.15
0.69
G1








GQ
29.0
29.0
29.0
0.00
0.000
29.00
1.84
1.39
GT







•
GZ







ft
HI







ft.
HK
22.0
21.0
23.0
1.00
0.236
22.00
-0.58
-1.04
HL








HP
HX
23.0
24.0
25.0
1.00
0.236
24.00
0.11
-0.35
lint'
I
22.0
22.0
20.0
1.15
0.236
21.33
-0.81
•
-1.27
ID








IU







•-
J







•
JE
23.0
22.0
23.0
0.58
0.118
22.67
-0.35
-0.81
JG







•
JM







•
JN







*
JQ







*
JS
19.0
19.0
17.0
1.15
0.236
18.33
-1.85
-2.31
JX







%
JY
20.0
19.0
17.0
1.53
0.354
18.67
-1.74
-2.19
K
17.0
15.0
15.0
1.15
0.236
15.67
-2.78
-3.23 #
KE







•
KT








KX
21.0
22.0
22.0
0.58
0.118
21.67
-0.70
-1.15
L
23.0
24.0
24.0
0.58
0.118
23.67
-0.01
-0.46
IF.
22.0
22.0
23.0
0.58
0.118
22.33
-0.47
-0.92
LF
15.0
16.0
17.0
1.00
0.236
16.00
-2.66
-3.12 U
LL







< •
LR







•
LT
27.0
27.0
27.0
0.00
0.000
27.00
1.15
0.69
M
24.0
25.0
25.0
0.58
0.118
24.67
0.34
-0.12
MF







* :
MP








MV







' •
• 3
0 3
No data submitted
Insufficient data
X' =
TAG SYMBOLS
Determined to be an outlier
IT s Above control limit
U s Below control limit
-------
r,
19/42
			^
CRD-LV Performance Evaluation: Blind-B, 15-Oct-1996
Strontium-90





Lab
Res. 1
Res. 2

Exper. Rng anal

Normalized deviation
Res. 3
Sigma (R + SR)
Average
(grand-avg) (known) Tag
MY





0
N





0
NA





#
NH





•-
NJ
22.0
25.0
22.0
1.73 0354
23.00
-0.24 -0.69
•
NK





NO





•
NT
33.0
33.0
33.0
0.00 0.000
33.00
3.23 2.77
0





•
OB





•
OF





•
OM





*
OS





•
OX





•
OY





•
P





•
PA





•
PB
24.0
25.0
24.0
0.58 0.118
24.33
0.22 -0.23
PO






PM





•
PQ





•-
PR






PV
27.0
25.0
20.0
3.61 0.827
24.00
0.11 -0.35
PW





•
Q
20.0
22.0
23.0
1.53 0.354
21.67
-0.70 -1.15
QC





•
QM
23.0
25.0
23.0
1.15 0.236
23.67
-0.01 -0.46
QP





•
QQ





•
QT





•
QU
20.0
18.0
23.0
2.52 0.591
20.33
-1.16 -1.62
QW
21.0
22.0
17.0
2.65 0.591
20.00
-1.28 -1.73
QX






QZ
21.0
21.0
22.0
0.58 0.118
21.33
-0.81 -1.27
BO





•
RF






RO





•
B1





•
RK





•
RP





•
RR





•
RU





•
RZ





•
S
23.0
24.0
24.0
0.58 0.118
23.67
-0.01 -0.46
sc
23.0
23.0
23.0
0.00 0.000
23.00
-0.24 -0.69
• =
No data submitted

TAG SYMBOLS

ft h Above control limit
[0-
Insufficient data
X 3
Determined to be an' outfiefr011 L.'JJ
U = Below control limit J
-------
CRD-LV Performance Evaluation: Blind-B, 15-Oct-1996	20 / 42
Strontium-90







Lab
Res. 1
Res. 2

Exper.
Rng anal

Normalized deviation
Res. 3
Sigma
(R + SR)
Average
(grand-avg)
(known) Tag
SD
24.0
25.0
30.0
3.21
0.709
26.33
0.92
0.46
SF
26.0
26.0
26.0
0.00
0.000
26.00
0.80
0.35
•
SG







SI
20.0
20.0
20.0
0.00
0.000
20.00
-1.28
-1.73
•
SL







SM
26.0
24.0
24.0
1.15
0.236
24.67
0.34
-0.12
SN








SO







•
SR







*
SS
28.0
28.0
28.0
0.00
0.000
28.00
1.49
1.04
sx








sz
26.0
24.0
24.0
1.15
0.236
24.67
0.34
-0.12
T
23.0
24.0
24.0
0.58
0.118
23.67
-0.01
-0.46
TD







•
TG







*
TH








TL







•
TN







•
TQ
26.0
27.0
25.0
1.00
0.236
26.00
0.80
0.35
T8








TY







•
U
26.0
26.0
27.0
0.58
0.118
26.33
0.92
0.46
UA







~
UE
28.0
28.0
27.0
0.58
0.118
27.67
1.38
0.92
UK








UN








UP
230
19.0
	21.0
2.00
0.473
21.00
-0.93
-1.39
UQ


v°"
- ' ¦;



•• * *<¦ -
VA
24.0
29.0
24.0
2.89
0.591
25.67
0.69
0.23
VH
21.0
20.0
20.0
0.58
0.118
20.33
-1.16
-1.62
VI
23.0
220
19.0
2.08
0.473
2133
-0.81
-i.27
VJ


'*< a \ ¦»





VM


"\v ^ ' ^
¦ ^ ,o


vV . <, V

VO
17.0
16.0
210
2.65
0.591
18.00
-1.97
-2.42
VT
' -







W
23.0
220
22.0
0.58
0.118
22.33
-0.47
-0.92
WE






' - '

WH







' •
WO







WR
210
21.0
25.0
231
0.473
22.33
-0.47
-0.92
WW
* .• '





r v „

WY








X
21.0
_ 24.0
23.0
1-53
°-354.
22.67
	-0.35
-0.81
XA ~
.'




* \ ->
w 'y-'^ > ~

• 3 No data submitted u,i	TAG SYMBOLS	ft = Above control limit
0 = Insufficient data J' a._* = Determined to be an outlier	= Below control limit
-------
21/42
CRD-LV Performance Evaluation: Blind-B, 15-Oct-1996
Stronti um-90
Data sorted by Laboratory Average
Average Tag
Lab
Average
Tag Lab
Average
Tag
Lab
15.67 li
K
22.33
LE
24.67

M
16.00 U
LF
22.67
X
25.00

EB
18.00
VO
22.67
JE
25.00

BL
18.33
JS
22.67
DO
25.00

BB
18.67
JY
22.67
AL
25.00

AW
20.00
SI
22.67
AF
25.33

CX
20.00
QW
23.00
SC
25.67

VA
20.33
VH
23.00
NJ
26.00

TQ
20.33
QU
23.00
EL
26.00

SF
21.00
UP
23.00
BM
26.00

CJ
21.00
DT
23.00
A
26.00

c
21.00
BC
23.67
T
26.33

u
21.33
VI
23.67
S
26.33

SD
21.33
QZ
23.67
QM
26.67

E
21.33
I
23.67
L
26.67

AZ
21.33
BA
23.67
CA
27.00

LT
21.67
Q
23.67
BO
27.00

FZ
21.67
KX
24.00
PV
27.67

UE
21.67
AK
24.00
HP
28.00

SS
21.67
AJ
24.00
D
28.00

DZ
22.00
HK
24.00
CE
28.67

CS
22.00
DE
24.33
PB
29.00

GQ
22.00
AU
24.33
AE
31.33

CG
22.33
WR
24.67
SZ
31.33

BG
22.33
W
24.67
SM
33.00

NT




2373.33
X
DD
% responding labs

Frequency distribution





			I|||
ill 1




¦ i. Hillll
iliiili
	r*	

i	H31
-6
responding labs
-4	-2	0	+2
Normalized deviation of the mean from the known value
Frequency distribution
10-
0—r
•6
i.illilll.n.. ¦
—i—
+6
-4
-2
Normalized deviation of the mean from the grand average
• = No data submitted
0 = Insufficient data
TAG SYMBOLS
• x = Determined to be an outlier
ft = Above control limit
11 = Below control limit
-------
CRD-LV Performance Evaluation: Blind-B, 15-Oct-1996
22/42
Cobalt-60	Statistical Summary	179 Participants
The known value of this nuclide is 15.0 pCi/1 with an expected precision of 5.0; the control limits
are 6.3 to 23.7; the warning regions are 6.3 to 9.2 and 20.8 to 23.7
65(36.3 %) Failed to respond, ^	\	, 106(59.2 %) Within all limits
6(3.4 %) Outliers
--- 2(1.1 %) In warning zone
but within control
Statistic
Respondents
Non-outliers
Mean
18.18
Grand Avg 15.24
Std. Dev.
21.08
1.75
Variance
444.44
3.05
% Coef. of Var.
115.99
11.45
% deviation of mean from known value
21.17
1.63
Norm. dev. of mean from known value
0.15
0.14
Median
15.00
15.00
% deviation of median from known value
0.00
0.00
Norm. dev. of median from known value
0.00
0.00
6(5.3 %) More than 3 norm. S.D. ».
2(1.8 %) Between 2 and 3 norm. S.D. *
i 98(86.0 %) Within 1 norm. S.D.
of known value
u\ '
*• 8(7.0 %) Between 1 and 2 norm. S.D.

-------
ft
23/42
CRD-LV Performance Evaluation: Blind-B, 15-Oct-1996


Cobalt-60








Lab
Res. 1
Res. 2
Res. 3
Exper.
Rng anal

Normalized deviation

Sigma
' (R + SR)
Average
(grand-avg)
(known) Tag
A
14.0
14.0
14.0
0.00
0.000
14.00
-0.43
-0.35

AE
16.0
14.0
15.0
1.00
0.236
15.00
-0.08
0.00

AF
16.0
15.0
16.0
0.58
0.118
15.67
0.15
0.23

AH
14.0
14.0
15.0
0.58
0.118
14.33
-0.32
-0.23

AJ
15.0
15.0
15.0
0.00
0.000
15.00
-0.08
0.00

AK
17.0
15.0
16.0
1.00
0.236
16.00
0.26
0.35

AL
18.0
15.0
21.0
3.00
0.709
18.00
0.95
1.04

AP








.#
AR








©
AU
16.0
14.0
13.0
1.53
0.354
14.33
-0.32
-0.23

AW
18.0
18.0
19.0
0.58
0.118
18.33
1.07
1.15

AZ
14.0
14.0
16.0
1.15
0.236
14.67
-0.20
-0.12

BA
18.0
15.0
20.0
2.52
0.591
17.67
0.84
0.92

BB
17.0
15.0
18.0
1.53
0.354
16.67
0.49
0.58

BC
13.0
15.0
14.0
1.00
0.236
14.00
-0.43
-0.35

BG
27.0
21.0
13.0
7.02
2.245
20.33
1.76
1.85

BH
21.0
20.0
17.0
2.08
0.473
19.33
1.42
1.50

BK
14.0
14.0
14.0
0.00
0.000
14.00
-0.43
-0.35

BL
16.0
15.0
14.0
1.00
0.236
15.00
-0.08
0.00

BM
14.0
15.0
14.0
0.58
0.118
14.33
-0.32
-0.23

BN
14.0
14.0
13.0
0.58
0.118
13.67
-0.55
-0.46

BO
15.0
14.0
16.0
1.00
0.236
15.00
-0.08
0.00

BS









BW








•
C
17.0
16.0
15.0
1.00
0.236
16.00
0.26
0.35

CA
16.0
15.0
16.0
0.58
0.118
15.67
0.15
0.23

CE
12.0
13.0
14.0
1.00
0.236
13.00
-0.78
-0.69

CO








•
CJ
16.0
15.0
13.0
1.53
0.354
14.67
-0.20
-0.1*

CM









CO








4
CS
14.0
15.0
16.0
1.00
0.236
15.00
-0.08
0.00

CX
14.0
23.0
16.0
4.73
1.120
17.67
0.84
0.92

D
14.0
18.0
15.0
2.08
0.473
15.67
0.15
0.23

DB








•
DD
15.0
15.0
15.0
0.00
0.000
15.00
-0.08
0.00

DE
14.0
14.0
14.0
0.00
0.000
14.00
-0.43
-0.35

DI









DO
17.0
10.0
17.0
4.04
0.827
14.67
-0.20
-0.12

DS








•
DT
15.0
11.0
16.0
2.65
0.591
14.00
-0.43
-0.35

DZ








•
E
14.0
14.0
14.0
0.00
0.000
14.00
-0.43
-0.35

EB
14.0
14.0
14.0
0.00
0.000
14.00
-0.43
-0.35

EL
14.0
14.0
14.0
0.00
0.000
14.00
-0.43
-0.35

• =
No data submitted

TAG SYMBOLS

1T = Above control limit

Insufficient data
X s
Determined to be an outlier
li a Below control limit
		'J
-------
->
CRD-LV Performance Evaluation: Blind-B, 15-Oct-1996	24/42
Cobalt-60
Lab Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known) Tag
EO








•
ER









EV








•
EX
2240
219.0
225.0
3.21
0.709
222:67
71.86
71.94
k
FE
15.0
10.0
11.0
2.65
0.591
12.00
-1.12
-1.04

FF








*
FJ
14.0
14.0
14.0
0.00
0.000
14.00
-0.43
-0.35

FL
15.0
15.0
14.0
0.58
0.118
14.67
-0.20
-0.12

FK.








m
FZ
14.0
14.0
12.0
1.15
0.236
13.33
-0.66
¦0.58

GI
13.0
14.0
13.0
0.58
0.118
13.33
-0.66
¦0.58

GQ
14.0
14.0
14.0
0.00
0.000
14.00
-0.43
-0.35

GT









Gfc








*
HI
13.0
14.0
20.0
3.79
0.827
15.67
0.15
0.23

HK
15.0
15.0
15.0
0.00
0.000
15.00
-0.08
0.00

HL
97.0
98;0
96.0
1.00
0.236
97:00
28;32
28.41
iC
HP
14.0
16.0
15.0
1.00
0.236
15.00
-0.08
0.00

HX
15.0
14.0
14.0
0.58
0.118
14.33
-0.32
-0.23

I
14.0
15.0
15.0
0.58
0.118
14.67
-0.20
-0.12

m









IU
j
17.0
17.0
15.0
1.15
0.236
16.33
0.38
0.46

JE
15.0
14.0
15.0
0.58
0.118
14.67
-0.20
-0.12

JG
13.0
14.0
13.0
0.58
0.118
13.33
-0.66
-0.58

JM
15.0
15.0
14.0
0.58
0.118
14.67
-0.20
-0.12

JN








•
JQ








~
JS
15.0
15.0
15.0
0.00
0.000
15.00
-0.08
0.00

JX








*
JY
15.0
16.0
16.0
0.58
0.118
15.67
0.15
0.23

K
14.0
13.0
13.0
0.58
0.118
13.33
-0.66
-0.58

KE








*
KT








•
KX
15.0
15.0
15.0
0.00
0.000
15.00
-0.08
0.00

L
14.0
16.0
15.0
1.00
0.236
15.00
-0.08
0.00

LE
16.0
18.0
18.0
1.15
0.236
17.33
0.72
0.81

LF
15.0
15.0
16.0
0.58
0.118
15.33
0.03
0.12

LL








;•
LR
15.0
15.0
15.0
0.00
0.000
15.00
-0.08
0.00

LT
14.0
15.0
14.0
0.58
0.118
14.33
-0.32
-0.23

M
14.0
15.0
14.0
0.58
0.118
14.33
-0.32
-0.23

MF








•
MP
22.0
17.0
24.0
3.61
0.827
21.00
1.99
2.08

MV
6:0
6.0
5.0
0.58
0118
5.67
-3;32
-3.23
-x
• s No data submitted	TAG SYMBOLS	1T a Above control limit
0 3 Insufficient data	x1^ Determined to be an outlier	11' a Below control limit
-------
((	
25/42
CRD-LV Performance Evaluation: Blind-B, 15-Oct-1996

	
Cobalt-60







>
Lab
Res. 1
Res. 2

Exper.
Rng anal

Normalized deviation

Res. 3
Sigma
(R + SR)
Average
(grand-avg)
(known) Tag
MX








£
N








•
NA








•
NH
14.0
13.0
13.0
0.58
0.118
13.33
-0.66
-0.58

NJ
13.0
14.0
14.0
0.58
0.118
13.67
-0.55
-0.46

NK
15.0
14.0
15.0
0.58
0.118
14.67
-0.20
-0.12

NO








•
NT








•
O
16.0
16.0
15.0
0.58
0.118
15.67
0.15
0.23

OB
15.0
15.0
14.0
0.58
0.118
14.67
-0.20
-0.12

OF








*%¦
OM
27.0
26.
OY








•
P
21.0
23.0
21.0
1.15
0.236
21.67
2.22
2.31

PA








•
PB
15.0
14.0
15.0
0.58
0.118
14.67
-0.20
-0.12

PG








• <
PM
15.0
15.0
14.0
0.58
0.118
14.67
-0.20
-0.12

PQ








9
PR








•
PV
17.0
17.0
15.0
1.15
0.236
16.33
0.38
0.46

PW
14.0
14.0
14.0
0.00
0.000
14.00
-0.43
-0.35

Q
14.0
14.0
15.0
0.58
0.118
14.33
-0.32
-0.23

QC








. ©
QM
19.0
14.0
17.0
2.52
0.591
16.67
0.49
0.58

QP
12.0
14.0
12.0
1.15
0.236
12.67
-0.89
-0.81

QQ









QT
15.0
13.0
14.0
1.00
0.236
14.00
-0.43
-0.35

QU
13.0
14.0
14.0
0.58
0.118
13.67
-0.55
-0.46

QW
14.0
13.0
15.0
1.00
0.236
14.00
-0.43
-0.35

QX
19.0
19.0
18.0
0.58
0.118
18.67
1.19
1.27

QZ
16.0
14.0
16.0
1.15
0.236
15.33
0.03
0.12

RD








•
RF
15.0
13.0
13.0
1.15
0.236
13.67
-0.55
-0.46

RG








•
RK








•
RK








•
RP









RR
19.0
18.0
16.0
1.53
0.354
17.67
0.84
0.92

RU
15.0
15.0
14.0
0.58
0.118
14.67
-0.20
-0.12

RZ








•
S
13.0
14.0
14.0
0.58
0.118
13.67
-0.55
-0.46

sc
12.0
16.0
13.0
2.08
0.473
13.67
-0.55
-0.46

• =
No data submitted

TAG SYMBOLS

ft s Above control limit
[0a
V	
Insufficient data

Petermined to be an outlier
II = Below control limit
	JJ
-------
"v
CRD-LV Performance Evaluation: Blind-B, 15-Oct-1996	26 / 42
r
Cobalt-60







>
Lab
Res. 1
Res. 2

Exper.
Rng anal

Normalized deviation

Res. 3
Sigma
(R + SR)
Average
(grand-avg)
(known) Tag
SD
15.0
17.0
14.0
1.53
0.354
15.33
0.03
0.12

SF
14.0
15.0
150
0.58
0.118
14.67
-0.20
-0.12

SG







* .
SI
15.0
18.0
17.0
153
0.354
16.67
0.49
0.58

SL








SM
15.0
14.0
17.0
1.53
0.354
15.33
0.03
0.12

SN;









so








V* /Vj-
SR
20.0
16.0
18.0
2.00
0.473
18.00
0.95
1.04

ss
15.0
16.0
15.0
0.58
0.118
15.33
0.03
0.12

sx
16.0
16.0
14.0
1.15
0.236
15.33
0.03
0.12

sz
14.0
15.0
15.0
0.58
0.118
14.67
-0.20
-0.12

T
16.0
16.0
14.0
1.15
0.236
15.33
0.03
0.12

TD









TO








•
TH








' • "":
TL








[tl'h
TSl








*
TQ
11.0
14.0
1.4.0

0.354
13.00
-0.78
-0.69

ts;









':TYS








V •x-'W,
U
14.0
15.0
14.0
0.58
0.118
14.33
-0.32
-0.23

:tIA>








•*^TVV
UE
14.0
14.0
13.0
0.58
0.118
13.67
-0.55
-0.46

UK-
44,0
32.0
40.0
6.11
1.795;
38.6?:
8.11
8.20

UN
16.0
15.0
17.0
1.00
0.236
16.00
0.26
0.35

UP
15.0
16.0
15.0
0.58
0.118
15.33
0.03
0.12

UQ









VA
17.0
17.0
16.0
0.58
0.118
16.67
0.49
0.58

VH
15.0
15.0
16.0
0.58
0.118
15.33
0.03
0.12

VI
170
16.0
16.0
0.58
0.118
1633
0.38
0.46

VJ








. • .
VM
15.0
15.0
15.0
0.00
0.000
15.00
-0.08
0.00

VO
18.0
19.0
16.0
1.53
0.354
17.67
0.84
0.92

VT
16.0
17.0
16.0
0.58
0.118
16.33
0.38
0.46

W
16.0
13.0
14.0
i.53
0.354
14.33
-0.32
-0.23

WE









WH








¦si?
f.-'.v;
WO
33.0
44.0
29.0
7.77
2.470:
36.335
696
7,04!
-kH
WR
15.0
16.0
17.0
1.00
0.236
16.00
0.26
0.35

WW
12.0
15.0
13.°
1.53
0.354
13.33
-0.66
-0.58

WY









X
22.0
19.0
20.0
1.53
0.354
20.33
1.76
1.85

XA
17.0
16.0
18.0
1.00
0.236
17.00
0.61
0.69

• s No data submitted	TAG SYMBOLS	ft s Above control limit
0 a Insufficient data	x = Determined to be an,1 outlier -	II 3 Below control limit
-------
/, =
27>42
CRD-LV Performance Evaluation: Blind-B, 15-Oct-1996
Cobalt-60
Data sorted by Laboratory Average
Average
Tasr
Lab
Average
Tag
Lab
Average
Tag
Lab
5.67
X
MV
14.33

AU
15.67

O
12.00

FE
14.33

AH
15.67

JY
12.67

QP
14.67

SZ
15.67

HI
13.00

TQ
14.67

SF
15.67

D
13.00

CE
14.67

KU
15.67

CA
13.33

WW
14.67

PM
15.67

AF
13.33

NH
14.67

PB
16.00

WR
13.33

K
14.67

OB
16.00

UN
13.33

JG
14.67

NK
16.00

C
13.33

GI
14.67

JM
16.00

AK
13.33

FZ
14.67

JE
16.33

VT
13.67

UE
14.67

I
16.33

VI
13.67

sc
14 67

FL
16.33

PV
13.67

s
14.67

DO
16 33

IU
13.67

RF
14.67

CJ
16.67

VA
13.67

QU
14.67

AZ
16.67

SI
13.67

NJ
15.00

VM
16.67

QM
13.67

BN
15 00

LR
16.67

BB
14.00

QW
15.00

L
17.00

XA
14.00

QT
15.00

KX
17.33

LE
14.00

PW
15.00

JS
17.67

vo
14.00

GQ
15.00

HP
17.67

RR
14.00

FJ
15.00

HK
17.67

CX
14.00

EL
15.00

DD
17.67

BA
14.00

EB
15.00

CS
18.00

SR
14.00

E
15.00

BO
18.00

AL
14.00

DT
15.00

BL
18.33

AW
14.00

DE
15.00

AJ
18.67

QX
14.00

BK
15.00

AE
19.33

BH
14.00

BC
15.33

VH
20.33

X
14.00

A
15.33

UP
20.33

BG
14.33

W
15.33

T
21.00

MP
14.33

U
15.33

SX
21.67

P
14.33

Q
15.33

ss
26.33
X
OM
14.33

M
15.33

SM
35.33
X
WO
14.33

LT
15.33

SD
38.67
X
UK
14.33

HX
15.33

QZ
97.00
X
HL
14.33

BM
15.33

LF
222.67
X
EX
• & No data Bubmltted	TAG SYMBOLS	ft s Above control limit
! 0 a Insufficient data	x = Determined to be an outlier	& = Below control limit J
V».	I-. J. ¦ ¦¦¦- —- — —		- ¦ - — ' —~ ¦¦ "¦¦¦ '	> 1	.— I.I—	.. ¦ —	-I — — "V
-------
CRD-LV Performance Evaluation: Blind-B, 15-Oct-1996
28/42
Cobalt-60
% responding labs
Frequency distribution
1
ll
—I-
1
1
1
t
i
1
1
1
1
I
1
1
1 '
1
1
1
1
1
1
1
1
¦ 1 '

Normalized deviation of the mean from the known value
responding labs	Frequency distribution
20-
10-
0
— mT~
-4	-2	0	+2	+4
Normalized deviation of the mean from the grand average
-------
CRD-LV Performance Evaluation: Blind-B, 15-Oct-1986	29/42
		 ^		
f 												
Cesium-134	Statistical Summary	179 Participants
The known value of this nuclide is 20.0 pCi/1 with an expected precision of 5.0; the control limits
are 11.3 to 28.7; the warning regions are 11.3 to 14.2 and 25.8 to 28.7
Statistic	Respondents	Non-outliers
Mean
20.84
Grand Avg 18.46
Std. Dev.
25.87
1.75
Variance
669.22
3.07
% Coef. ofVar.
124.15
9.50
% deviation of mean from known value
4.18
-7.73
Norm. dev. of mean from known value
0.03
-0.88
Median
18.50
18.50
% deviation of median from known value
-7.50
-7.50
Norm. dev. of median from known value
-0.06
-0.86
-------
Cc	
30/42
CRD-LV Performance Evaluation: Blind-B, 15-Oct-1996

	
Cesium-134








Lab
Res. 1
Res. 2

Exper.
Rng anal

Normalized deviation

Res. 3
Sigma
(R + SR)
Average
(grand-avg)
(known) Tag
A
19.0
21.0
19.0
1.15
0.236
19.67
0.42
-0.12

AE
19.0
19.0
18.0
0.58
0.118
18.67
0.07
-0.46

AF
18.0
16.0
18.0
1.15
0.236
17.33
-0.39
-0.92

AH
20.0
19.0
21.0
1.00
0.236
20.00
0.54
0.00

AJ
17.0
17.0
17.0
0.00
0.000
17.00
-0.50
-1.04

AK
20.0
20.0
20.0
0.00
0.000
20.00
0.54
0.00

AL
18.0
20.0
20.0
1.15
0.236
19.33
0.30
-0.23

AP








•
AR








•
AU
19.0
17.0
18.0
1.00
0.236
18.00
-0.16
-0.69

AW
19.0
19.0
19.0
0.00
0.000
19.00
0.19
-0.35

AZ
20.0
20.0
22.0
1.15
0.236
20.67
0.77
0.23

BA
18.0
22.0
19.0
2.08
0.473
19.67
0.42
-0.12

BB
20.0
19.0
20.0
0.58
0.118
19.67
0.42
-0.12

BC
20.0
20.0
21.0
0.58
0.118
20.33
0.65
0.12

BG
20.0
32.0
17.0
7.94
2.470
23.00
1.57
1.04

BH
20.0
21.0
20.0
0.58
0.118
20.33
0.65
0.12

BK
17.0
18.0
18.0
0.58
0.118
17.67
-0.27
-0.81

BL
19.0
21.0
19.0
1.15
0.236
19.67
0.42
-0.12

BM
20.0
20.0
19.0
0.58
0.118
19.67
0.42
-0.12

BN
16.0
17.0
17.0
0.58
0.118
16.67
-0.62
-1.15

BO
19.0
20.0
20.0
0.58
0.118
19.67
0.42
-0.12

BS








•
BW








•
C
19.0
20.0
20.0
0.58
0.118
19.67
0.42
-0.12

CA
18.0
18.0
19.0
0.58
0.118
18.33
-0.04
-0.58

CE
18.0
19.0
17.0
1.00
0.236
18.00
-0.16
-0.69

CO








*
CJ
19.0
19.0
21.0
1.15
0.236
19.67
0.42
-0.12

CM









CO








0
cs
17.0
18.0
18.0
0.58
0.118
17.67
-0.27
-0.81

cx
16.0
20.0
20.0
2.31
0.473
18.67
0.07
-0.46

D
19.0
21.0
25.0
3.06
0.709
21.67
1.11
0.58

DB








, w
DD
21.0
22.0
20.0
1.00
0.236
21.00
0.88
0.35

DE
19.0
19.0
20.0
0.58
0.118
19.33
0.30
-0.23

DI









DO
26.0
21.0
23.0
2.52
0.591
23.33
1.69
1.15

DS








9
DT
18.0
14.0
16.0
2.00
0.473
16.00
-0.85
-1.39

DZ








•
E
18.0
19.0
18.0
0.58
0.118
18.33
-0.04
-0.58

EB
16.0
16.0
16.0
0.00
0.000
16.00
-0.85
-1.39

EL
20.0
20.0
18.0
1.15
0.236
19.33
0.30
-0.23

• =
No data submitted

TAG SYMBOLS

IT s Above control limit
in
Q
—"
Insufficient data
Xi =
Determined to be an outlier^1^1
U = Below control limit
-------
CRD-LV Performance Evaluation: Blind-B, 15-Oct>1996
31/42
Cesium-134
Lab Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known) Tag
KO








ER








BV







•
EX
289t0
289.0
29410
2.89
0.591
290.67
94.30
93,76 x
FE
12.0
9.0
10.0
1.53
0.354
10.33
-2.81
>3:35 x
FF







•
FJ
19.0
20.0
20.0
0.58
0.118
19.67
0.42
-0.12
FL
18.0
18.0
17.0
0.58
0.118
17.67
-0.27
-0.81
FN,








FZ
18.0
17.0
17.0
0.58
0.118
17.33
-0.39
-0.92
GI
15.0
16.0
15.0
0.58
0.118
15.33
-1.08
-1.62
GQ
19.0
19.0
19.0
0.00
0.000
19.00
0.19
-0.35
Gl







»
GZ







»
m
13.0
15.0
13.0
1.15
0.236
13.67
-1.66
-2.19
HK
18.0
18.0
18.0
0.00
0.000
18.00
-0.16
-0.69
HL
18.0
18.0
18.0
0.00
0.000
18.00
-0.16
-0.69
HP
20.0
18.0
20.0
1.15
0.236
19.33
0.30
-0.23
HX
17.0
17.0
17.0
0.00
0.000
17.00
-0.50
-1.04
I
18.0
19.0
19.0
0.58
0.118
18.67
0.07
-0.46
ID







•
IU
¦J,
19.0
18.0
18.0
0.58
0.118
18.33
-0.04
-0.58
JE
19.0
19.0
18.0
0.58
0.118
18.67
0.07
• s
-0.46
JG
18.0
16.0
22.0
3.06
0.709
18.67
0.07
-0.46
JM
18.0
19.0
19.0
0.58
0.118
18.67
0.07
-0.46
JN







•
JQ







i
JS
18.0
19.0
19.0
0.58
0.118
18.67
0.07
-0.46
JX








JY
18.0
17.0
19.0
1.00
0.236
18.00
-0.16
-0.69
K
21.0
21.0
22.0
0.58
0.118
21.33
1.00
0.46
KE








KT







•
KX
19.0
21.0
19.0
1.15
0.236
19.67
0.42
-0.12
L
19.0
18.0
18.0
0.58
0.118
18.33
-0.04
-0.58
LE
22.0
21.0
22.0
0.58
0.118
21.67
1.11
0.58
LF
19.0
20.0
19.0
0.58
0.118
19.33
0.30
-0.23
ll







•
LR
15.0
18.0
17.0
1.53
0.354
16.67
-0.62
-1.15
LT
17.0
18.0
17.0
0.58
0.118
17.33
-0.39
-0.92
M
18.0
20.0
20.0
1.15
0.236
19.33
0.30
-0.23
MF








MP
16.0
18.0
14.0
2.00
0.473
16.00
-0.85
-1.39
MV
6;0
6.0
5.0
0.58
0.118
5,33
-4.55
-508 X
• 3
0 a
No data submitted
Insufficient data
X 3
TAG SYMBOLS
Determined to be an outlier
It s Above control limit
ll s Below control limit
-------
/f	
32/
42
CRD-LV Performance Evaluation: Blind-B, 15-Oct-1996

	
Cesium-134







>
Lab
Res. 1
Res. 2
Res. 3
Exper.
Rng anal

Normalized deviation

Sigma
(R + SR)
Average
(grand-avg)
(known) Tae
MY









N








w ¦
9-
NA








•,
NH
18.0
18.0
18.0
0.00
0.000
18.00
-0.16
-0.69

NJ
18.0
17.0
18.0
0.58
0.118
17.67
-0.27
-0.81

NK
13.0
16.0
14.0
1.53
0.354
14.33
-1.43
-1.96

NO








•
NT








•
O
21.0
20.0
20.0
0.58
0.118
20.33
0.65
0.12

OB








•
OF








•
OM
35.0
3410'
34:0
0:5$
0118
34133
5.50

x
OS








¦ •:
OX








¦
OY








•
P
18.0
16.0
19.0
1.53
0.354
17.67
-0.27
-0.81

PA








#'
PB
16.0
160
15.0
0.58
0.118
15.67
-0.97
-1.50

PG








•
PM
17.0
14.0
18.0
2.08
0.473
16.33
-0.73
-1.27

PQ








•
PR








•
PV
20.0
21.0
19.0
1.00
0.236
20.00
0.54
0.00

PW
17.0
18.0
18.0
0.58
0.118
17.67
-0.27
-0.81

Q
18.0
19.0
18.0
0.58
0.118
18.33
-0.04
-0.58

QC








•J
QM
13.0
15.0
13.0
1.15
0.236
13.67
-1.66
-2.19

QP
15.0
18.0
14.0
2.08
0.473
15.67
-0.97
-1.50

QQ








•
QT
17.0
17.0
16.0
0.58
0.118
16.67
-0.62
-1.15

QU
16.0
16.0
19.0
1.73
0.354
17.00
-0.50
-1.04

QW
17.0
17.0
16.0
0.58
0.118
16.67
-0.62
-1.15

ox
19.0
19.0
19.0
0.00
0.000
19.00
0.19
-0.35

QZ
19.0
17.0
18.0
1.00
0.236
18.00
-0.16
-0.69

RD









RF
20.0
19.0
19.0
0.58
0.118
19.33
0.30
-0.23

RG









R1








*
RK









RP








•
RR
21.0
19.0
21.0
1.15
0.236
20.33
0.65
0.12

RU
18.0
17.0
17.0
0.58
0.118
17.33
-0.39
-0.92

RZ








•
S
16.0
17.0
17.0
0.58
0.118
16.67
-0.62
-1.15

sc
15.0
18.0
14.0
2.08
0.473
15.67
-0.97
-1.50

• 3
No data submitted

TAG SYMBOLS

It 3 Above control limit
0 =
V-	
Insufficient data
x =
Determined to be an outlier
= Below control limit
	
-------
CRD-LV Performance Evaluation: Blind-B, 15-Oct-1996	33 / 42
r
Cesium-134
Lab Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known) Tag
SD
24.0
22.0
21.0
1.53
0.354
22.33
1.34
0.81
SF
17.0
20.0
21.0
2.08
0.473
19.33
0.30
-0.23
SG







•
SI
20.0
22.0
17.0
2.52
0.591
19.67
0.42
-0.12
SL







-•
SM
16.0
19.0
19.0
1.73
0.354
18.00
-0.16
-0.69
SN







»
SO







•
SR
17.0
20.0
17.0
1.73
0.354
18.00
-0.16
-0.69
SS
19.0
19.0
21.0
1.15
0.236
19.67
0.42
-0.12
SX
17.0
18.0
19.0
1.00
0.236
18.00
-0.16
-0.69
sz
18.0
17.0
18.0
0.58
0.118
17.67
-0.27
-0.81
T
19.0
19.0
19.0
0.00
0.000
19.00
0.19
-0.35
TD







•-
TG







*
TH







•
TL







«
TN







»
TQ
18.0
17.0
17.0
0.58
0.118
17.33
-0.39
-0.92
T8







»
TY







•
U
19.0
19.0
20.0
0.58
0.118
19.33
0.30
-0.23
UA







0
UE
18.0
19.0
20.0
1.00
0.236
19.00
0.19
-0.35
UK
19.0
23.0
12.0
5.57
1.570
18.00
-0.16
-0.69
UN
17.0
18.0
16.0
1.00
0.236
17.00
-0.50
-1.04
UP
18.0
15.0
20.0
2.52
0.591
17.67
-0.27
-0.81
UQ







•
VA
20.0
20.0
18.0
1.15
0.236
19.33
0.30
-0.23
VH
16.0
18.0
17.0
1.00
0.236
17.00
-0.50
-1.04
VI
16.0
17.0
16.0
0.58
0.118
16.33
-0.73
-1.27
VJ







•
VM
20.0
20.0
20.0
0.00
0.000
20.00
0.54
0.00
VO
20.0
20.0
20.0
0.00
0.000
20.00
0.54
0.00
VT
17.0
18.0
18.0
0.58
0.118
17.67
-0.27
-0.81
W
18.0
18.0
19.0
0.58
0.118
18.33
-0.04
-0.58
WE








WH;








WO







•
WR
20.0
20.0
20.0
0.00
0.000
20.00
0.54
0.00
WW
18.0
14.0
16.0
2.00
0.473
16.00
-0.85
-1.39
WY








X
17.0
20.0
19.0
1.53
0.354
18.67
0.07
-0.46
XA
21.0
20.0
20.0
0.58
0.118
20.33
0.65
0.12
• a No data submitted	TAG SYMBOLS	ft a Above control limit
0 3 Insufficient data 11 x s Determined to be an outlier	11 a Below control limit
-------
34' 42	CRD-LV Performance Evaluation: Blind-B, 15-Oct-1996
Cesium-134
Data sorted by Laboratory Average
Average
Tag
Lab
Average
Tag
Lab
Average
Tag
Lab
5.33
X
MV
17.67

CS
19.33

LF
10.33
X
FE
17.67

BK
19.33

HP
13.67

QM
18.00

UK
19.33

EL
13.67

HI
18.00

sx
19.33

DE
14.33

NK
18.00

SR
19.33

AL
15.33

GI
18.00

SM
19.67

SS
15.67

SC
18.00

QZ
19.67

SI
15.67

QP
18.00

NH
19.67

KX
15.67

PB
18.00

JY
19.67

FJ
16.00

WW
18.00

HL
19.67

CJ
16.00

MP
18.00

HK
19.67

C
16.00

EB
18.00

CE
19.67

BO
16.00

DT
18.00

AU
19.67

BM
16.33

VI
18.33

W
19.67

BL
16.33

PM
18.33

Q
19.67

BB
16.67

S
18.33

L
19.67

BA
16.67

QW
18.33

IU
19.67

A
16.67

QT
18.33

E
20.00

WR
16.67

LR
18.33

CA
20.00

VO
16.67

BN
18.67

X
20.00

VM
17.00

VH
18.67

JS
20.00

PV
17.00

UN
18.67

JM
20.00

AK
17.00

QU
18.67

JG
20.00

AH
17.00

HX
18.67

JE
20.33

XA
17.00

AJ
18.67

I
20.33

RR
17.33

TQ
18.67

CX
20.33

O
17.33

RU
18.67

AE
20.33

BH
17.33

LT
19.00

UE
20.33

BC
17.33

FZ
19.00

T
20.67

AZ
17.33

AF
19.00

QX
21.00

DD
17.67

VT
19.00

GQ
21.33

K
17.67

UP
19.00

AW
21.67

LE
17.67

SZ
19.33

VA
21.67

D
17.67

PW
19.33

U
22.33

SD
17.67

P
19.33

SF
23.00

BG
17.67

NJ
19.33

RF
23.33

DO
17.67

FL
19.33

M
34.33
290.67
X
X
OM
EX
• = No data submitted	TAG SYMBOLS	IT s Above control limit
0 s Insufficient data	x = Determined to be an outlier	-U = Below control limit J
-------
			
CRD-LV Performance Evaluation: Blind-B, 15-Oct-1996	35 / 42
Ceaium-134
% responding labs	Frequency distribution

—i	T	1—
¦T ¦«l|llllll—T-

-6	-4	-2	0+2+4
Normalized deviation of the mean from the known value
responding labs	Frequency distribution
20-
10-
oJ—T
-2	0+2+4
Normalized deviation of the mean from the grand average
-------
CRD-LV Performance Evaluation: Blind-B, 15-Oct-1996
36/42
Ce8ium-137	Statistical Summary	179 Participants
The known value of this nuclide is 30.0 pCi/1 with an expected precision of 5.0; the control limits
are 21.3 to 38.7; the warning regions are 21.3 to 24.2 and 35.8 to 38.7
66(36.9 %) Failed to respond
5(2.8 %) Outliers -*
Statistic
06(59.2 %) Within all limits
Respondents
.1 %) In warning zone
but within control
Non-outliers
Mean
34.94
Grand Avg 30.50
Std. Dev.
40.92
2.14
Variance
1674.34
4.57
% Coef. of Var.
117.13
7.01
% deviation of mean from known value
16.45
1.66
Norm. dev. of mean from known value
0.12
0.23
Median
30.33
30.33
% deviation of median from known value
1.11
1.11
Norm. dev. of median from known value
0.01
0.16
5(4.4 %) More than 3 norm. S.D.
. 90(79.6 %) Within 1 norm. S.D.
of known value
2(1.8 %) Between 2 and 3 norm. S.D. •

.T,"	'
fr^'' ' %'s'> X
'• f ^,v's ¦ '¦	V
* 16(14.2 %) Between 1 and 2 norm. S.D.
-------
A	
37/
\
42
CRD-LV Performance Evaluation: Blind-B, 15-Oct-1996

	^
Cesium-137







\
Lab
Res. 1
Res. 2

Exper.
Rng anal

Normalized deviation

Res. 3
Sigma
(R + SR)
Average
(grand-avg)
(known) Tag
A
29.0
28.0
28.0
0.58
0.118
28.33
-0.75
-0.58

AE
28.0
34.0
29.0
3.21
0.709
30.33
-0.06
0.12

AF
33.0
31.0
29.0
2.00
0.473
31.00
0.17
0.35

AH
30.0
30.0
31.0
0.58
0.118
30.33
-0.06
0.12

AJ
30.0
30.0
30.0
0.00
0.000
30.00
-0.17
0.00

AK
32.0
32.0
30.0
1.15
0.236
31.33
0.29
0.46

AL
28.0
27.0
25.0
1.53
0.354
26.67
-1.33
-1.15

AP









AR








' -
AU
29.0
30.0
31.0
1.00
0.236
30.00
-0.17
0.00

AW
30.0
31.0
31.0
0.58
0.118
30.67
0.06
0.23

AZ
32.0
31.0
34.0
1.53
0.354
32.33
0.64
0.81

BA
29.0
30.0
27.0
1.53
0.354
28.67
-0.63
-0.46

BB
31.0
30.0
32.0
1.00
0.236
31.00
0.17
0.35

BC
30.0
30.0
30.0
0.00
0.000
30.00
-0.17
0.00

BG
33.0
25.0
22.0
5.69
1.570
26.67
-1.33
-1.15

BH
33.0
32.0
31.0
1.00
0.236
32.00
0.52
0.69

BK
31.0
31.0
31.0
0.00
0.000
31.00
0.17
0.35

BL
28.0
30.0
29.0
1.00
0.236
29.00
-0.52
-0.35

BM
31.0
30.0
30.0
0.58
0.118
30.33
-0.06
0.12

BN
31.0
29.0
26.0
2.52
0.591
28.67
-0.63
-0.46

BO
29.0
28.0
30.0
1.00
0.236
29.00
-0.52
-0.35

BS








** •
BW







-

C
32.0
31.0
30.0
1.00
0.236
31.00
0.17
0.35

CA
29.0
30.0
32.0
1.53
0.354
30.33
-0.06
0.12

CE
300
31.0
32.0
1.00
0.236
31.00
0.17
0.35

CG








9
CJ
28.0
30.0
30.0
1.15
0.236
29.33
-0.40
-0.23

CM








• -•
CO








' •
CS
32.0
32.0
33.0
0.58
0.118
32.33
0.64
0.81

CX
29.0
33.0
31.0
2.00
0.473
31.00
0.17
0.35

D
39.0
29.0
33.0
5.03
1.345
33.67
1.10
1.27

DB








• ''
DD
29.0
31.0
31.0
1.15
0.236
30.33
-0.06
0.12

DE
28.0
29.0
29.0
0.58
0.118
28.67
-0.63
-0.46

DI









DO
35.0
25.0
36.0
6.08
1.570
32.00
0.52
0.69

DS:








•V.'"
DT
32.0
29.0
29.0
1.73
0.354
30.00
-0.17
0.00

DZ









E
32.0
31.0
32.0
0.58
0.118
31.67
0.41
0.58

EB
30.0
30.0
30.0
0.00
0.000
30.00
-0.17
0.00

EL
30.0
31.0
29.0
1.00
0.236
30.00
-0.17
0.00

• =
No data submitted

TAG SYMBOLS -

ft = Above control limit
U-
Insufficient dataju-ii'
. X a
Determined to be an outlier
•11 = Below control limit
		V
-------
(f	~

CRD-LV Performance Evaluation: Blind-B, 15-Oct-1996
	^
38/42
Cesium-137








Lab
Res. 1
Res. 2

Exper.
Rng anal

Normalized deviation

Res. 3
Sigma
(R + SR)
Average
fgrand-avg)
(known) Tag
EO^









ER









EV








•
EX
479.0
466.0
449.0
15;70
5.846
461.33
149.25
149.42
X
FE
24.0
26.0
24.0
1.15
0.236
24.67
-2.02
-1.85

FF









FJ
32.0
33.0
30.0
1.53
0.354
31.67
0.41
0.58

FL
SO.O
310
32.0
1.00
0.236
31.00
0.17
0.35

FN:








" *
FZ
29.0
28.0
27.0
1.00
0.236
28.00
-0.86
-0.69

GI
30.0
29.0
27.0
1.53
0.354
28.67
-0.63
-0.46 .

GQ
28.0
28.0
28.0
0.00
0.000
28.00
-0.86
-0.69

GT









GZ









HI
24.0
27.0
29.0
2.52
0.591
26.67
-1.33
-1.15

HK
32.0
32.0
31.0
0.58
0.118
31.67
0.41
0.58

HL
34.0
38.0
31.0
3.51
0.827
34.33
1.33
1.50

HP
33.0
32.0
31.0
1.00
0.236
32.00
0.52
0.69

HX
29.0
29.0
28.0
0.58
0.118
28.67
-0.63
-0.46

I
81.0
29.0
28.0
1.53
0.354
29.33
-0.40
-0.23

m








•
ru
J
28.0
32.0
31,0
2.08
0.473
30.33
-0.06
0.12

JE
31.0
30.0
29.0
1.00
0.236
30.00
-0.17
0.00
' •
JG
27.0
30.0
30.0
1.73
0.354
29.00
-0.52
-0.35

JM
31.0
310
32.0
0.58
0.118
31.33
0.29
0.46

JN








* ¦*
JQ









JS
30.0
30.0
32.0
1.15
0.236
30.67
0.06
0.23

JX








"s
^
JY
31.0
31.0
32.0
0.58
0.118
31.33
0.29
0.46

K
33.0
33.0
34.0
0.58
0.118
33.33
0.98
1.15

KE








#
KT








~
KX
33.0
31.0
31.0
1.15
0.236
31.67
0.41
0.58

L
32.0
33.0
35.0
1.53
0.354
33.33
0.98
, 1.15

LE
45.0
30.0
38.0
7.51
2.470
37.67
2.48
2.66

LF
32.0
31.0
31.0
0.58
0118
31.33
0.29
0.46

LL









LE
29.0
30.0
28.0
1.00
0.236
29.00
-0.52
-0.35

LT
30.0
28.0
30.0
1.15
0.236
29.33
-0.40
-0.23

M
30.0
31.0
30.0
0.58
0.118
30.33
-0.06
0.12

MF;









MP
31.0
30.0
24.0
3.79
0.827
28.33
-0.75
-0.58

MV
130
13.0
12.0
0.58
0.118
12.67
-6.18
-6»0O
-x
• 5
No data submitted

TAG SYMBOLS

1! 3 Above control limit

Insufficient data
X s
Determined to be an outlier
3 Below control limit
	jj
-------
((	
39/
42
CRD-LV Performance Evaluation: Blind-B, 15-Oct-1996

	
'
Cesium-137







\
Lab
Res. 1
Res. 2

Exper.
Rng anal

Normalized deviation

Res. 3
Sigma
(R + SR)
Average
(grand-avg)
(known) Tag
MY








•
N'.









NA









NH
31.0
32.0
31.0
0.58
0.118
31.33
0.29
0.46

NJ
28.0
29.0
29.0
0.58
0.118
28.67
-0.63
-0.46

NK
31.0
31.0
31.0
0.00
0.000
31.00
0.17
0.35

NO








'• - *
NT-









O
32.0
32.0
32.0
0.00
0.000
32.00
0.52
0.69

OB
32.0
31.0
31.0
0.58
0.118
31.33
0.29
0.46

ov








•
OM
640
63.0
63.0
0.68
0.118
63.33
1L3?
11.65
X
08








»
OX









OY









P
28.0
26.0
27.0
1.00
0.236
27.00
-1.21
-1.04

PA









PB
32.0
32.0
31.0
0.58
0.118
31.67
041
0.58

PG









PM
29.0
36.0
33.0
3.51
0.827
32.67
0.75
0.92

PQ








-
PR








•
PV
30.0
36.0
30.0
3.46
0.709
32.00
0.52
0.69

PW
30.0
29.0
29.0
0.58
0.118
29.33
-0.40
-0.23

Q
28.0
28.0
29.0
0.58
0.118
28.33
-0.75
-0.58

QC








•
QM
32.0
34.0
37.0
2.52
0.591
34.33
1.33
1.50

QP
26.0
24.0
28.0
2.00
0.473
26.00
-1.56
-1.39

QQ









QT
27.0
29.0
27.0
1.15
0.236
27.67
-0.98
-0.81

QU
27.0
26.0
28.0
1.00
0.236
27.00
-1.21
-1.04

QW
26.0
29.0
30.0
2.08
0.473
28.33
-0.75
-0.58

QX
34.0
36.0
34.0
1.15
0.236
34.67
1.44
1.62

QZ
32.0
30.0
30.0
1.15
0.236
30.67
0.06
0.23

KD









RF
31.0
29.0
27.0
2.00
0.473
29.00
-0.52
-0.35

RQ









R1









RK









RP








*
' •
RR
29.0
32.0
32.0
1.73
0.354
31.00
0.17
0.35

RU
31.0
29.0
29.0
1.15
0.236
29.67
-0.29
-° 12

RZ









S
28.0
28.0
29.0
0.58
0.118
28.33
-0.75
-0.58

sc
30.0
29.0
29.0
0.58
0.118
29.33
-0.40
-0.23

• =
No data submitted

TAG SYMBOLS

It s Above control limit
0 =
	
Insufficient data
x =
Determined to be an outlier
= Below control limit
	jj
-------
CRD-LV Performance Evaluation: Blind-B, 15-Oct-1996	40 / 42
r
Cesium-137
Lab Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known)
Tag
SD
32.0
31.0
34.0
1.53
0.354
32.33
0.64
0.81

SF
28.0
33.0
32.0
2.65
0.591
31.00
0.17
0.35

SO







• .
SI
32.0
30.0
32.0
1.15
0.236
31.33
0.29
0.46

SL--







<• .
SM
29.0
34.0
31.0
2.52
0.591
31.33
0.29
0.46

8N«








SO









SR
32.0
29.0
28.0
2.08
0.473
29.67
-0.29
-0.12

ss
35.0
31.0
35.0
2.31
0.473
33.67
1.10
1.27

sx
29.0
28.0
34.0
3.21
0.709
30.33
-0.06
0.12

sz
30.0
31.0
30.0
0.58
0.118
30.33
-0.06
0.12

T
33.0
31.0
31.0
1.15
0.236
31.67
0.41
0.58

TD









TO;








^
TKT
" A'









TL








'• ••
• IN.









TQ
28.0
30.0
29.0
1.00
0.236
29.00
-0.52
-0.35

TS









TY








• " T
U
32.0
33.0
33.0
0.58
0.118
32.67
0.75
0.92

UA








- •- *1
UE
29.0
29.0
30.0
0.58
0.118
29.33
-0.40
-0.23

UK
36.0
34.0
42.0
4.16
0.945
37.33
2.37
2.54

UN
32.0
31.0
30.0
1.00
0.236
31.00
0.17
0.35

UP
33.0
36.0
31.0
2.52
0.591
33.33
0.98
1.15

UQ









VA
29.0
29.0
29.0
0.00
0.000
29.00
-0.52
-0.35

VH
30.0
29.0
31.0
1.00
0.236
30.00
-0.17
0.00

VI
32.0
31.0
35.0
2.08
0.473
32.67
0.75
0.92

VJ








:
VM
77.0
77.0^
77.0
0.00
0.000
77.00
16,11
16.28
*
VO
31.0
30.0
33.0
1.53
0.354
31.33
0.29
0.46

VT
410
38.0
40.0
1.53
0.354
39.67
3.18
3.35

W
31.0
29.0
31.0
1.15
0.236
30.33
-0.06
0.12

WE









WH









WO









WR
27.0
28.0
29.0
1.00
0.236
28.00
-0.86
-0.69

WW
31.0
30.0
27.0
2.08
0.473
29.33
-0.40
-0.23

WY









X
33.0.
34.0
28.0
3.21
0.709
31.67
0-41
0.58

XA
36.0
35.0
35.0
0.58
0.118
35.33
1.68
1.85

• = No data submitted	TAG SYMBOLS	1T = Above control limit
[0- Insufficient data	x = Determined to be an outlier	11 = Below control limit
^	—v
-------
41/42
CRD-LV Performance Evaluation: Blind-B, 15-Oct-1996
Cesium-137
Data sorted
Average
Tag
Lab
Average
Tag
Lab
Average
Tag
Lab
12.67
X
MV
29.67

SR
31.33

NH
24.67

FE
29.67

RU
31.33

LF
26.00

QP
30.00

VH
31.33

JY
26.67

HI
30.00

JE
31.33

JM
26.67

BG
30.00

EL
31.33

AK
26.67

AL
30.00

EB
31.67

X
27.00

QU
30.00

DT
31.67

T
27.00

P
30.00

BC
31.67

PB
27.67

QT
30.00

AU
31.67

KX
28.00

WR
30.00

AJ
31.67

HK
28.00

GQ
30.33

W
31.67

FJ
28.00

FZ
30.33

SZ
31.67

E
28.33

S
30.33

sx
32.00

PV
28.33

QW
30.33

M
32.00

O
28.33

Q
30.33

IU
32.00

HP
28.33

MP
30.33

DD
32.00

DO
28.33

A
30.33

CA
32.00

BH
28.67

NJ
30.33

BM
32.33

SD
28.67

HX
30.33

AH
32.33

CS
28.67

GI
30.33

AE
32.33

AZ
28.67

DE
30.67

QZ
32.67

VI
28.67

BN
30.67

JS
32.67

U
28.67

BA
30.67

AW
32.67

PM
29.00

VA
31.00

UN
33.33

UP
29.00

TQ
31.00

SF
33.33

L
29.00

RF
31.00

RR
33.33

K
29.00

LR
31.00

NK
33.67

SS
29.00

JG
31.00

FL
33.67

D
29.00

BO
31.00

CX
34.33

QM
29.00

BL
31.00

CE
34.33

HL
29.33

WW
31.00

C
34.67

QX
29.33

UE
31.00

BK
35.33

XA
29.33

SC
31.00

BB
37.33

UK
29.33

PW
31.00

AF
37.67

LE
29.33

LT
31.33

VO
39.67
X
VT
29.33

I
31.33

SM
63.33
X
OM
29.33

CJ
31.33

SI
77.00
X
VM



31.33

OB
461.33
X
EX
• = No data submitted
0 = Insufficient data
TAG SYMBOLS
x = Determined to be an outlier
1T = Above control limit
JJ " Below control limit
-------
CRD-LV Performance Evaluation: Blind-B, 15-Oct-1996
42/42
Cesium-137
% responding labs		Frequent^ distribution
-2	0+2+4
Normalized deviation of the mean from the known value
% responding labs		Frequency distribution
10-
uL
I	I	T	I	I	1	I * Im I
4	-2	0	+2	+4
Normalized deviation of the mean from the grand average
-------
United States	Office of Researcn and	EPA/600/R-96/143
Environmental Protection	Development	December 1996
Agency	Washington, DC 20460
&EPA Gross Alpha-Beta
in Water Performance
Evaluation Study
A Statistical Evaluation of
the October 25,1996 Data
-------
Gross Alpha-Beta in Water
Performance Evaluation Study
October 25, 1996
Environmental Protection Agency
National Exposure Research Laboratory
Characterization Research Division
Las Vegas, Nevada
-------
A
UNITED STATES ENVIRONMENTAL PROTECTION AGENCY
OFFICE OF RESEARCH AND DEVELOPMENT
NATIONAL EXPOSURE RESEARCH LABORATORY
CHARACTERIZATION RESEARCH DIVISION-LAS VEGAS
P.O. BOX 93478
LAS VEGAS, NEVADA 89193-3478
(702/798-2100)
V/
Dear Participant,
Enclosed are the results of the Analytical Sciences Branch (CRD-LV)
Performance Evaluation Study for Gross Alpha-Beta in Water; October 25, 1996.
The known value for each analysis was determined by gravimetric methods,
checked by chemical analyses performed by CRD-LV's Radiochemistry Laboratory,
and compared to the participating laboratories' grand average.
The expected precision, determined by the known value, was taken from
'Table 3. Laboratory Precision: One Standard Deviation Values and Control Limits
for Various Analyses", which is based on data accumulated over the years by the
Performance Evaluation Program, and can be found in the Environmental Radioactivity
Performance Evaluation Studies Program and Radioactive Standards Distribution
Program information brochure.
Please take a few minutes to review this report and the analytical data your
laboratory submitted to us. If there are any apparent discrepancies, please notify us
immediately.
We encourage you to make use of the computer-automated data-entry system
that has been in place for some time now. As the number of participants increases,
and it becomes unrealistic for us to receive results by mail or FAX, the computer
system will be our only avenue for accepting data.
If you have any questions or comments, please send a message via the data-entry
system or contact Stephen Pia at 702/798-2102 or Patricia Honsa at 702/798-2141.
Stephen Pia
Team Leader
RADQA Program
Enclosure
-------
NOTICE
This material has been funded wholly by
the U.S. Environmental Protection Agency.
It has been subjected to the Agency's review,
and has been approved for publication as
an EPA document.
-------
CRIKLV Performance Evaluation: Gross Alpha-Beta in Water, 25»Oct-1996 1/18
The following pages consist of separate sections for each of the nuclides in this study with four
parts per section. After the first, each part is separated from the next hy a tipw pnge or a thick
horizontal bar. The first page of each section is a statistical summary for the nuclide and starts
with a statement of the known value, the control limits, and the warning limits.
The warning limits are placed at two normalized standard deviations above and below the
known, value and the control limits are three normalized standard deviations above and below
the known value. If you keep control charts, these values will be useful for anticipating problems
with the accuracy of your analytical methods.
The coin shaped pie chart at the top of the summary page shows the fate of all the samples
sent out in number and percentage terms. The pie chart starts at the top and rotates clockwise.
The first sector represents those participants who submitted analytical results within both the
warning and control limits. The next sector represents those who are in the warning region but
not out of control. The third sector represents those who are out of control, but have passed
the outlier test. The fourth sector represents those who have failed the outlier test. The last
sector represents those participants who have failed to respond properly. This is the case if no
analytical results were returned, or less than three determinations were reported, or if the results
were received too late. The reeding on the edge of the coin is spaced at one percent intervals, and
the sector shading becomes darker as the data reliability decreases. Sectors with zero width are
not shown.
The table in the center Bhows a number of statistical quantities calculated from the submitted
data based on the mean and median values in relation to the known value, both before and after
outlier removal. The lower pie chart uses the same construction as the upper chart and shows
the distribution of properly submitted data in terms of deviation from the known value divided
into sectors representing one, two, three, and greater than three normalized standard deviations.
The second part is an alphabetical listing, in lab-code order, of submitted data and several
calculated quantities. An entry that is shaded has been rejected because of one of the reasons
listed above or failure of the outlier test. The fifth and sixth columns are a measure of laboratory
precision. The Range analysis is a normalized value that you may use to keep precision control
charts. The eighth and ninth columns are the differences from the mean of all non-outliers and
from the known value, respectively. If this value is between 2.0 and 3.0, your analytical process
precision is in the warning zone; if it exceeds 3.0 it is out of control. A tag symbol may appear in
the last column. Each page with tags has a symbol definition summary at the bottom. If there is
no tag symbol, the data is within the control limits, but it may be in the warning zone.
The third part is a three-column listing of result average, tag symbol, and lab-code in average
order excluding those labs not responding properly. In this order, all outliers and out-of-control
results appear at the top or bottom of the list.
The last part is two bar chart displays showing frequency distributions of responding
participants. The first chart places the known value at the center and a bar at each 0.2 unit of
expected precision. The second chart places the mean of the reported measurements at the center
tmri a bar at each 0.2 unit of standard deviation. In both cases, a bar includes those results within
0.1 unit up to the main mum of six. Any results more than six units from the center value are
shown cumulatively by a shaded bar one past the sixth unit. If the central tendency of the known
value distribution falls away from the center, an error in accuracy is indicated. If the distribution
is broad, poor precision is indicated. The mean value distribution is similar but uses the average
and standard deviation of reported results as its basis.
-------
ff	... 				
|2/18 CHD-LV Performance Evaluation: Gross Alpha-Beta in Water, 25-Oct-19W
The Range Analysis(H + SR) is calculated from the range, mean range and standard error of
the range values. The range is the difference between the maximum and minimum rem»lte for the
laboratory. The mean range is calculated by multiplying the expected precision by 1.693{for three
results). The standard error of the range is calculated by multiplying the me an range by 2.575(for
three results), subtracting the mean range from this product, and dividing the result by 3. If the
range is greater than the mean range, then the range analysis is calculated by subtracting the
mean range from the range, dividing the result by the standard error of the range and adding 1.
If the mean, range is greater than or equal to the range, then the range analysis ie calculated by
dividing the range by the mean range.
The normalized deviation of the mean from the grand average is calculated from the deviation
of the mean from the grand average and the standard error of the mean values. The deviation of
the mean from the grand average is calculated by subtracting the grand average from the
average of the laboratory's three results. The standard error of the mean is calculated by
dividing the expected precision by the square root of 3{the number of results). The normalized
deviation of the m«an from the grand average is calculated by dividing the deviation of the mean
from the grand average by the standard error of the mean.
The normalized deviation of the mean from the known value is calculated from the deviation of
the mean from the known value and the standard error of the mean values. The deviation of the
mean from the known value is calculated by subtracting the known value from the average of the
laboratory's three results. The standard error of the mean is calculated by dividing the expected
precision by the square root of 3{the number of results). The normalized deviation of the mean
from the known value is calculated by dividing the deviation of the mean from the known value by
the standard error of the mean.
A complete explanation of the statistical calculations involved in the report may be found in
the Environmental Radioactivity Performance Evaluation Studies Program information brochure
[Draft Revision of EPA-600/4-81-0041, available from Patricia Honsa, CED-LV, 702/798-2141.
J
-------
CRD-LV Performance Evaluation: Gross Alpha-Beta in Water, 25-Oct-1996 3/16
Gross Alpha	Statistical Summary	186 Participants
The known value of this nuclide is 10.3 pCi/1 with an expected precision of 5.0; the control limits
are 1.6 to 19.0; the warning regions are 1.6 to 4.5 and 16.1 to 19.0
27(14.5 %) Failed to respond	; 141 (75.8 %) Within all limits
5(2.7 %) Outliers ' ; \K


2(1.1 %) Out of control •'

**• 11 (5.9 %) In warning zone
but not an outlier
r

but within control
Statistic
Respondents
Non-outliers
Mean
9.41
Grand Avg 8.86
Std. Dev.
4.28
2.89
Variance
18.33
8.38
% Coef. ofVar.
45.48
32.67
% deviation of mean from known value
-8.62
-13.99
Norm. dev. of mean from known value
-0.21
-0.50
Median
8.67
8.58
% deviation of median from known value
-15.86
-16.67
Norm. dev. of median from known value
-0.38
-0.59
7(4.4 %) More than 3 norm. S.D.
11 (6.9 %) Between 2 and dYiorm. S.D.
; 97(61.0 %) Within 1 norm. S.D.
¦
of known value
44(27.7 %) Between 1 and 2 norm. S.D.
-------
> 	 	:	
4/16 CRD-LV Performance Evaluation: Gross Alpha-Beta in Water, 25-Oct-1996
Gross Alpha






¦v
Lab
Res. 1
Res. 2
Res. 3
Exper.
Rng anal

Normalized deviation
Sigma
(R + SR)
Average
(grand-avg)
(known) Tag
A
10.7
9.3
9.6
0.74
0.165
9.87
0.35
-0.15
AE
9.8
7.6
12.7
2.56
0.602
10.03
0.41
-0.09
AF
6-2
7.5
7.9
0.89
0.201
7.20
-0.57
-107
Aff








AJ
5.3
1.3
3.0
2.01
0.473
3.20
-1.96
-2.46
AK
8.7
9.9
9.3
0.60
0.142
9.30
0.15
-0.35
AL
9.4
10.4
8.8
0.81
0.189
9.53
0.23
-0.27
AP
8.6
8.7
8.5
0.10
0.024
8.60
-0.09
-0.59
AR
6.2
7.4
7.3
0.67
0.142
6.97
-0.66
-1.15
AU
8.0
9.0
9.0
0.58
0.118
8.67
-0.07
-0.57
AW
9.1
8.0
9.3
0.70
0.154
8.80
-0.02
-0.52
AZ
8.0
8.5
9.6
0.82
0.189
8.70
-0.06
-0.55
BA
7.9
8.4
7.1
0.66
0.154
7.80
-0.37
-0.87
BB
6.6
7.3
7.8
0.60
0.142
7.23
-0.56
-1.06
BC
8.4
8.9
8.3
0.32
0.071
8.53
-0.11
-0.61
BG
14.6
14.6
11.8
1.62
0.331
13.67
1.67
1.17
BH
11.1
9.6
10.4
0.75
0.177
10.37
0.52
0.02
BK
10.7
11.1
9.7
0.72
0.165
10.50
0.57
0.07
BL
6.3
11.6
11.0
2.90
0.626
9.63
0.27
-0.23
BM
8.6
8.7
8.7
0.06
0.012
8.67
-0.07
-0.57
BN
5.8
5.2
6.5
0.65
0.154
5.83
-1.05
-1.55
BO
10.2
7.5
7.8
1.48
0.319
8.50
-0.12
-0.62
BS
12.9
10.1
9.9
1.68
0.354
10.97
0.73
0.23
C
12.0
11.5
13.0
0.76
0.177
12.17
1.15
0.65
CA
11.6
7.8
11.1
2.06
0.449
10.17
0.45
-0.05
CE
7.3
9.5
9.4
1.24
0.260
8.73
-0.04
-0.54
CG
9.6
10.9
10.0
0.67
0.154
10.17
0.45
-0.05
CJ
9.4
9.5
8.2
0.72
0.154
9.03
0.06
-0.44
CO
4.1
5.6
4.1
0.87
0.177
4.60
-1.48
-1.97
CS
6.2
7.6
6.9
0.70
0.165
6.90
-0.68
-1.18
CX
6.1
3.2
3.1
1.70
0.354
4.13
-1.64
-2.14
D
13.4
13.7
10.0
2.06
0.437
12.37
1.21
0.72
DB
12.4
11.8
10.6
0.92
0.213
11.60
0.95
0.45
DD
10.4
9.4
10.4
0.58
0.118
10.07
0.42
-0.08
DE
8.7
8.8
8.8
0.06
0.012
8.77
-0.03
-0.53
DH
8.2
9.0
8.4
0.42
0.095
8.53
-0.11
-0.61
DO
5.2
4.3
8.5
2.21
0.496
6.00
-0.99
-1.49
DR
0.1
0.1
0.1
0.00
0.000
0.10
-3.03
-3.53
DS
15.7
15.4
11.3
2.46
0.520
14.13
1.83
1.33
DT
8.0
7.4
7.9
0.32
0.071
7.77
-0.38
-0.88
DZ
15.6
13.6
14.3
1.01
0.236
14.50
1.95
1.45
E
6.8
11.5
7.1
2.63
0.555
8.47
-0.14
-0.64
EB
16.4
16.1
13.0
1.88
0.402
15.17
2.18
1.69
EL
10.8
10.5
10.1
0.35
0.083
10.47
0.56
0.06
EO
5.0
4.0
7.0
1.53
0.354
5.33
-1.22
-1.72
• =
No data submitted

TAG SYMBOLS

IT a Above control limit
0 =
	
Insufficient data
X 3
Determined to be an outlier
11 = Below control limit
-------
CRD-LV Performance Evaluation: Gross Alpha-Beta in Water, 25-Oct-1996 5/16
Gross Alpha
Lab Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known) Tag
EK
9.6
7.9
8.9
0.85
0.201
8.80
-0.02
-0.52

EV
6.2
6.4
5.6
0.42
0.095
6.07
-0.97
-1.47

EW








- • '
EX
13.7
8.1
7.3
3.49
0.756
9.70
0.29
-0.21

FE
15.7
14.6
17.3
1.36
0.319
15.87
2.43
1.93

FF
8.3
5.7
6.3
1.36
0.307
6.77
-0.72
-1.22

FJ
14.0
11.3
14.9
1.87
0.425
13.40
1.57
1.07

FL
6.6
8.2
7.6
0.81
0.189
7.47
-0.48
-0.98

FN
7.0
7.0
7.0
0.00
0.000
7.00
-0.64
-1.14

FZ
8.6
8.0
8.5
0.32
0.071
8.37
-0.17
-0.67

GQ
7.8
7.3
6.7
0.55
0.130
7.27
-0.55
-1.05

GT
7.7
9.3
6.3
1.50
0.354
7.77
-0.38
-0.88

GZ
10.0
11.7
10.7
0.85
0.201
10.80
0.67
0.17

HI
3.6
3.6
4.1
0.29
0.059
3.77
-1.76
-2.26

HK
8.1
7.3
6.8
0.66
0.154
7.40
-0.51
-1.00

HL
3.9
4.5
3.8
0.38
0.083
4.07
-1.66
-2.16

HP
6.3
6.1
7.3
0.64
0.142
6.57
-0.79
-1.29

I
8.3
5.5
8.8
1.78
0.390
7.53
-0.46
-0.96

m
7.4
12.4
10.3
2.51
0.591
10.03
0.41
-0.09

IU









J








•>-
JG
11.0
12.3
12.1
0.70
0.154
11.80
1.02
0.52

JM
9.3
10.3
10.7
0.72
0.165
10.10
0.43
-0.07

JN
8.4
10.6
10.6
1.27
0.260
9.87
0.35
-0.15

JP
6.7
6.9
7.6
0.47
0.106
7.07
-0.62
-1.12

JQ
10.1
8.7
8.4
0.91
0.201
9.07
0.07
-0.43

JS
7.3
6.6
8.8
1.12
0.260
7.57
-0.45
-0.95

JY
11.4
9.8
8.9
1.27
0.295
10.03
0.41
-0.09

K
10.1
10.1
11.7
0.92
0.189
10.63
0.61
0.12

KE
9.6
9.5
10.5
0.55
0.118
9.87
0.35
-0.15

KH
9.9
9.3
7.9
1.03
0.236
9.03
0.06
-0.44

KT
8.0
9.0
10.0
1.00
0.236
9.00
0.05
-0.45

KX









L
7.6
7.1
9.7
1.38
0.307
8.13
-0.25
-0.75

LE
6.1
10.3
8.6
2.11
0.496
8.33
-0.18
-0.68

LF
11.0
7.0
7.3
2.23
0.473
8.43
-0.15
-0.65

LL
14.6
14.3
14.3
0.17
0.035
14.40
1.92
1.42

LR
8.4
5.3
7.0
1.55
0.366
6.90
-0.68
-1.18

LT
7.4
5.0
5.0
1.39
0.284
5.80
-1.06
-1.56

M
19.0
18.0
16.0
1.53
0.354
17.67
3.05
2.55

MF
8.9
7.8
7.3
0.82
0.189
8.00
-0.30
-0.80

MV
10.0
9.4
11.5
1.08
0.248
10.30
0.50
0.00

MX
"N? *
; i&g?
32;7?
34.4
1.32
0.307
3£97i
¦y»>	
-7;85:s

NA
11.0
14.0
12.0
1.53
0.354
12.33
1.20
0.70

• 3
.. 0-
No data submitted
Insufficient data
X s
TAG SYMBOLS
Determined to be an outlier
1T a Above control limit
JJ s Below control limit
-------
6/16 CRD-LV Performance Evaluation: Gross Alpha-Beta in Water, 25-Oct-1996
Gross Alpha
Lab Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average'
Normalized deviation
(grand-avg) (known) Tag
NB
12.5
10.9
11.2
0.85
0.189
11.53
0.93
0.43

NJ
5.9
7.6
6.1
0.93
0.201
6.53
-0.81
-1.30

NK
6.7
6.0
7.6
0.80
0.189
6.77
-0.72
-1.22

NO
7.2
7.9
8.6
0.70
0.165
7.90
-0.33
-0.83

NP
8.8
9.1
6.8
1.25
0.272
8.23
-0.22
-0.72

NT
13.1
9.8
9.8
1.91
0.390
10.90
0.71
0.21

O
11.2
9.8
8.4
1.40
0.331
9.80
0.33
-0.17

OA
4.9
4.7
7.2
1.39
0.295
5.60
-1.13
-1.63

OB
17.6
16.1
14.9
1.35
0.319
16.20
2.54
2.04

OF
6.5
7.1
9.0
1.31
0.295
7.53
-0.46
-0.96

OS
11.0
9.0
8.0
1.53
0.354
9.33
0.16
-0.33

OT








•"
OX>









0 &








t-
P
14.3
14.4
10.4
2.28
0.473
13.03
1.45
0.95

PA
4.9
5.3
5.0
0.21
0.047
5.07
-1.31
-1.81

PB
7.3
7.3
8.2
0.52
0.106
7.60
-0.44
-0.94

PG
10.8
10.1
9.9
0.47
0.106
10.27
0.49
-0.01

PM
9.8
9.5
10.5
0.51
0.118
9.93
0.37
-0.13

PQ
9.0
7.8
7.9
0.67
0.142
8.23
-0.22
-0.72

PR
16.3
14.8
14.3
1.04
0.236
15.13
2.17
1.67

PV
8.7
9.2
9.2
0.29
0.059
9.03
0.06
-0.44

Q
6.3
5.9
5.4
0.45
0.106
5.87
-1.04
-1.54

QC








•
QM
10.6
7.7
9.7
1.48
0.343
9.33
0.16
-0.33

QP
6.7
7.0
7.2
0.25
0.059
6.97
-0.66
-1.15

QQ
10.2
10.4
8.1
1.27
0.272
9.57
0.24
-0.25

QT
27.0
233;
22.8
2.29
0.496
24*37
537
4.87
*
QU
23*1^
24 2
•23;«P
o;56
01130
23.60
5.11
4.61
';xj\
QW
19.8
18:8

1.31
0.307
20.00
3.86
3.38
* X$y
QX
8.9
7.5
8.2
0.70
0.165
8.20
-0.23
-0.73

QZ
6.1
6.3
4.4
1.04
0.224
5.60
-1.13
-1.63

R
4.5
4.2
3.5
0.51
0.118
4.07
-1.66
-2.16

RB
14.5
12.8
14.2
0.91
0.201
13.83
1.72
1.22

RD
11.1
9.7
12.3
1.30
0.307
11.03
0.75
0.25

RF
7.0
8.4
8.2
0.76
0.165
7.87
-0.34
-0.84

RG
10.8
9.3
9.7
0.78
0.177
9.93
0.37
-0.13

RI
7.3
6.9
6.4
0.45
0.106
6.87
-0.69
-119

RH









RR









RZ
9.7
9.2
8.1
0.82
0.189
9.00
0.05
-0.45

S
8.9
8.4
9.3
0.45
0.106
8.87
0.00
-0.50

sc








"
SD
8.4
9.0
8.3
0.38
0.083
8.57
-0.10
-0.60

SF
3.3
4.9
4.0
0.80
0.189
4.07
-1.66
-2.16

• = No data submitted TAG SYMBOLS IT s Above control limit
0 ~ Insufficient data	x g- Determined to be an outlier	 It a Below control limit
-------
CRD-LV Performance Evaluation: Gross Alpha-Beta in Water, 25-Oct-1996 7/16
Gross Alpha








Lab
Res. 1
Res. 2
Res. 3
Exper.
Rng anal

Normalized deviation

Sigma
(R + SR)
Average
(grand-avg)
(known) Tag
SG
8.0
7.9
6.2
1.01
0.213
7.37
-0.52
-1.02

SI
8.3
7.9
8.5
0.31
0.071
8.23
•0.22
-0.72

SL
10.2
11.4
9.8
0.83
0.189
10.47
0.56
0.06

SM
6.8
7.5
7.2
0.35
0.083
7.17
-0.59
-1.09

SN'







;
SO
6.1
5.9
6.0
0.10
0.024
6.00
-0.99
-1.49

SR
12.9
12.9
11.9
0.58
0.118
12.57
1.28
0.79

SS
6.4
6.7
6.6
0.15
0.035
6.57
-0.79
-1.29

su
3.3
4.4
4.6
0.70
0.154
4.10
-1.65
-2.15

sv
17.3
17.0
15.4
1.02
0.224
16.57
2.67
2.17

sx
7.7
8.1
8.3
0.31
0.071
8.03
-0.29
-0.79

sz
5.1
6.4
6.0
0.67
0.154
5.83
-1.05
-1.55

T
6.0
7.5
8.2
1.12
0.260
7.23
-0.56
-1.06

TD
12.7
14.2
13.9
0.79
0.177
13.60
1.64
1.14

TG
,36; 9
26:7
30.0
5.20
1.390
31.20
7.74
7.24
X
TH








•
TL








• >/
TN
8.4
8.1
7.3
0.57
0.130
7.93
-0.32
-0.82

TO
8.4
8.4
6.7
0.98
0.201
7.83
-0.36
-0.85

TQ
5.2
4.9
5.5
0.30
0.071
5.20
-1.27
-1.77

TW
10.2
9.6
8.4
0.92
0.213
9.40
0.19
-0.31

TY
7.6
8.2
6.7
0.75
0.177
7.50
-0.47
-0.97

U
9.9
9.3
9.9
0.35
0.071
9.70
0.29
-0.21

UAt









UE
8.9
8.3
10.2
0.97
0.224
9.13
0.09
-0.40

UN
6.6
6.9
8.0
0.74
0.165
7.17
-0.59
-1.09

UP
10.5
11.5
11.2
0.51
0.118
11.07
0.76
0.27

UQ
7.6
7.4
7.9
0.25
0.059
7.63
-0.42
-0.92

VA
12.0
9.6
13.1
1.79
°-413
11.57
0.94
0.44

VC








"*"V v
VH
8.5
8.6
13.0
2.57
0.532
10.03
0.41
-0.09

VI
8.0
8.3
7.4
0.46
0.106
7.90
-0.33
-0.83

VJ
15.0
18.7
17.6
1.90
0.437
17.10
2.85
2.36

VO
9.3
11.4
9.8
1.10
0.248
10.17
0.45
-0.05

VT








- A V
W
8.3
7.9
8.4
0.26
0.059
8.20
-0.23
-0.73

wr









WH
8.1
8.3
8.5
0.20
0.047
8.30
-0.19
-0.69

WJ
1.0
1.2
1.4
0.20
0.047
1.20
-2.65
-3.15

WN









WO
9.0
8.3
8.6
0.35
0.083
8.63
-0.08
-0.58

wpr









WR
8.6
7.4
6.9
0.87
0.201
7.63
-0.42
-0.92

WS








\ • * V
WU









• a No data submitted

TAG SYMBOLS

IT s Above control limit
0 s Insufficient data
x =
Determined to be an outlier
la Below control limit
^	-	j)
-------
8/16 CRD-LV Performance Evaluation: Gross Alpha-Beta in Water, 25-Oct-1996
Gross Alpha
Lab Res. 1
Res. 2
Res. 3
Exper. Rng anal	Normalized deviation
Sigma (R + SR) Average (grand-avg) (known) Tag
wv
WW
wx
WY
X
XB
6.1
8.5
9.8
8.4
8.0
7.8
4.5
9.0
11.0
1.96
0.50
1.62
0.461
0.118
0.378
6.33
8.50
9.53
-0.88
-0.12
0.23
-1.37
-0.62
-0.27
Data sorted by Laboratory Average
Average
Tag
Lab
Average
Tag
Lab
Average
Tag
Lab
0.10

DR
7.17

SM
8.50

WX
1.20
u
WJ
7.20

AF
8.50

BO
3.20

AJ
7.23

T
8.53

DH
3.77

HE
7.23

BB
8.53

BC
4.07

SF
7.27

GQ
8.57

SD
4.07

R
7.37

SG
8.60

AP
4.07

HL
7.40

HK
8.63

WO
4.10

SU
7.47

FL
8.67

BM
4.13

CX
7.50

TY
8.67

AU
4.60

CO
7.53

OF
8.70

AZ
5.07

PA
7.53

I
8.73

CE
5.20

TQ
7.57

JS
8.77

DE
5.33

EO
7.60

PB
8.80

ER
5.60

OA
7.63

UQ
8.80

AW
5.60

QZ
7.63

WR
8.87

S
5.80

LT
7.77

GT
9.00

RZ
5.83

SZ
7.77

DT
9.00

KT
5.83

BN
7.80

BA
9.03

PV
5.87

Q
7.83

TO
9.03

KH
6.00

SO
7.87

RF
9.03

CJ
6.00

DO
7.90

VI
9.07

JQ
6.07

EV
7.90

NO
9.13

UE
6.33

WW
7.93

TN
9.30

AK
6.53

NJ
8.00

MF
9.33

QM
6.57

ss
8.03

SX
9.33

OS
6.57

HP
8.13

L
9.40

TW
6.77

NK
8.20

W
9.53

X
6.77

FF
8.20

QX
9.53

AL
6.87

RI
8.23

SI
9.57

QQ
6.90

LR
8.23

PQ
9.63

BL
6.90

CS
8.23

NP
9.70

U
6.97

QP
8.30

WH
9.70

EX
6.97

AR
8.33

LE
9.80

O
7.00

FN
8.37

FZ
9.87

KE
7.07

JP
8.43

LF
9.87

JN
7.17

UN
8.47

E
9.87

A
• s No data submitted
0 a Insufficient data

TAG SYMBOLS
x s Determined to be an outlier
tr
= Above control limit
= Below control limit
-------
CRD-LV Performance Evaluation: Gross Alpha-Beta in Water, 25-Oct-1996 9/16
Gross Alpha
Data sorted by Laboratory Average
Average
Tag
Lab
Average
Tag
Lab
Average
Tag
Lab
9.93

RG
10.63

K
13.67

BG
9.93

PM
10.80

GZ
13.83

RB
10.03

VH
10.90

NT
14.13

DS
10.03

JY
10.97

BS
14.40

LL
10.03

ID
11.03

RD
14.50

DZ
10.03

AE
11.07

UP
15.13

PR
10.07

DD
11.53

NB
15.17

EB
10.10

JM
11.57

VA
15.87

FE
10.17

VO
11.60

DB
16.20

OB
10.17

CG
11.80

JG
16.57

SV
10.17

CA
12.17

C
17.10

VJ
10.27

PG
12.33

NA
17.67

M
10.30

MV
12.37

D
20.00
X
QW
10.37

BH
12.57

SR
23.60
X
QU
10.47

SL
13.03

P
24.37
X
QT
10.47

EL
13.40

FJ
31.20
X
TG
10.50

BK
13.60

TD
32.97
X
MX
responding labs	Frequency distribution
10-

,	iii		 ¦ |	¦¦¦¦llaBf !!¦	,	- . — ,	,-a
-6	-4	-2	0	+2	+4	+6
Normalized deviation of the mean from the known value
% responding labs	Frequency distribution
10-
m
lifi.
r- i	1	T—	t—	"l	iM iffi
-6	-4-2	0+2+4+6
Normalized deviation of the mean from the grand average
• 3 No data submitted	TAG SYMBOLS	1T s Above control limit
0 3 Insufficient data	x = Determined to be an outlier	11 a Below control limit
^ 	 ^
-------
CRD-LV Performance Evaluation: Gross Alpha-Beta in Water, 25-Oct-1996 10 / 16
Gross Beta	Statistical Summary	186 Participants
The known value of this nuclide is 34.6 pCi/1 with an expected precision of 5.0; the control limits
are 25.9 to 43.3; the warning regions are 25.9 to 28.8 and 40.4 to 43.3
27(14.5 %) Failed to respond
9(4.8 %) Outliers 4
8(4.3 %) Out of control
but not an outlier
Statistic
• 121(65.1 %) Within all limits
Respondents
21 (11.3 %) In warning zone
but within control
Non-outliers
Mean
Std. Dev.
Variance
% Coef. of Var.
% deviation of mean from known value
Norm. dev. of mean from known value
Median
% deviation of median from known value
Norm. dev. of median from known value
36.95
10.01
100.29
27.10
6.79
0.23
35.50
2.60
0.09
Grand Avg 35.29
4.47
19.97
12.67
1.98
0.15
35.35
2.17
0.17
17(10.7 %) More than 3 norm. S.D
21(13.2 %) Between 2
82(51.6 %) Within 1 norm. S.D.
of known value
39(24.5 %)
1 and 2 norm. S.D.
-------
r	
11/16 CRD-LV Performance Evaluation: Gross Alpha-Beta in Water, 25-Oct-1996
V
Gross Beta







Lab
Res. 1
Res. 2

Exper.
Rng anal

Normalized deviation
Res. 3
Sigma
(R + SR)
Average
(grand-avg)
(known) Tag
A
33.0
33.3
33.9
0.46
0.106
33.40
-0.65
-0.42
AE
27.3
23.3
28.1
2.57
0.567
26.23
-3.14
-2.90
AF
37.3
39.9
39.8
1.47
0.307
39.00
1.29
1.52
AH







«•'
AJ
35.3
32.2
29.7
2.81
0.662
32.40
-1.00
-0.76
AK
32.1
32.8
33.9
0.91
0.213
32.93
-0.81
-0.58
AL
31.4
32.1
33.1
0.85
0.201
32.20
-1.07
-0.83
AP
37.9
35.7
35.1
1.47
0.331
36.23
0.33
0.57
AR
39.4
38.9
43.1
2.29
0.496
40.47
1.79
2.03
AU
38.0
37.0
35.0
1.53
0.354
36.67
0.48
0.72
AW
38.0
36.4
37.8
0.87
0.189
37.40
0.73
0.97
AZ
32.3
30.0
34.3
2.15
0.508
32.20
-1.07
-0.83
BA
35.9
35.3
36.1
0.42
0.095
35.77
0.17
0.40
BB
33.4
30.0
36.3
3.15
0.744
33.23
-0.71
-0.47
BC
30.8
27.0
30.3
2.06
0.449
29.37
-2.05
-1.81
BG
38.3
37.1
36.9
0.76
0.165
37.43
0.74
0.98
BH
35.1
33.9
32.9
1.10
0.260
33.97
-0.46
-0.22
BK
38.7
38.7
39.9
0.69
0.142
39.10
1.32
1.56
BL
41.8
42.9
41.3
0.82
0.189
42.00
2.33
2.56
BM
42.0
40.8
39.6
1.20
0.284
40.80
1.91
2.15
BN
32.5
30.6
30.9
1.02
0.224
31.33
-1.37
-1.13
BO
34.2
35.6
36.9
1.35
0.319
35.57
0.10
0.33
BS
35.0
37.7
31.2
3.27
0.768
34.63
-0.23
0.01
C
33.2
3-1.9
31.4
0.93
0.213
32.17
-1.08
-0.84
CA
33.7
30.6
31.7
1.57
0.366
32.00
-1.14
-0.90
CE
31.2
33.0
35.0
1.90
0.449
33.07
-0.77
-0.53
CG
31.8
33.4
31.6
0.99
0.213
32.27
-1.05
-0.81
CJ
40.0
40.0
39.0
0.58
0.118
39.67
1.52
1.76
CO
24.0
19.2
20.3
2.51
0.567
21.17
-4.89
-4.65 U
CS
32.3
39.2
31.1
4.37
0.957
34.20
-0.38
-0.14
CX
29.9
30.0
30.1
0.10
0.024
30.00
-1.83
-1.59
D
38.7
35.5
38.2
1.72
0.378
37.47
0.76
0.99
DB
30.3
30.6
31.7
0.74
0.165
30.87
-1.53
-1.29
DD
32.5
35.3
39.7
3.63
0.851
35.83
0.19
0.43
DE
31.9
32.0
32.0
0.06
0.012
31.97
-1.15
-0.91
DH
41.1
37.2
33.2
3.95
0.933
37.17
0.65
0.89
DO
35.0
36.0
38.0
1.53
0.354
36.33
0.36
0.60
DR
37.3
40.9
43.1
2.93
0.685
40.43
1.78
2.02
DS
31.5
32.1
29.5
. 1.36
0.307
31.03
-1.47
-1.24
DT
36.3
37.5
36.3
0.69
0.142
36.70
0.49
0.73
DZ
30.8
31.5
34.2
1.80
0.402
32.17
-1.08
-0.84
E
35.7
32.5
36.4
2.08
0.461
34.87
-0.15
0.09
EB
42.5
37.5
40.8
2.54
0.591
40.27
1.73
1.96
EL
36.6
32.3
34.8
2.16
0.508
34.57
-0.25
-0.01
EO
37.0
36.0
37.0
0.58
0.118
36.67
0.48
0.72
• =
No data submitted

TAG SYMBOLS

IT = Above control limit
0 =
^	
Insufficient data
X 3
Determined to be an outlier
li = Below control limit
	—	//
-------
CRD-LV Performance Evaluation: Gross Alpha-Beta in Water, 25-Oct-1996 12/16
Gross Beta
Lab Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Ayerage
Normalized deviation
(grand-avg) (known) Tag









EV
35.2
37.6
35.7
1.27
0284
36.17
0.31
0.54
EW








EX
45.3
35.6
35.9
5.52
1.278
38.93
1.26
1.50
FE
30.8
31.5
31.8
0.51
0.118
31.37
-1.36
-1.12
FF
34.2
36.1
34.6
1.00
0.224
34.97
-0.11
013
FJ







•>
FL
36.2
28.2
33.6
4.08
0.945
32.67
-0.91
-0.67
FN
39.0
38.0
40.0
1.00
0.236
39.00
1.29
1.52
FZ
33.6
25.8
26.8
4.24
0.921
28.73
-2.27
-2.03
GQ
39.1
39.0
39.0
0.06
0.012
39.03
1.30
1.54
GT
39.3
37.4
43.9
3.34
0.768
40.20
1.70
1.94
GZ
40.8
33.8
43.2
4.88
1.210
39.27
1.38
1.62
HI
32.0
33.0
36.0
2.08
0.473
33.67
-0.56
-0.32
HK
40.0
40.2
38.6
0.87
0.189
39.60
1.49
1.73
HL
37.4
33.8
35.0
1.83
0.425
35.40
0.04
0.28
HP
34.8
35.7
33.7
1.00
0.236
34.73
-0.19
0.05
I
31.6
31.2
37.7
3.64
0.768
33.50
-0.62
-0.38
ID
36.3
40.9
37.6
2.37
0.543
38.27
1.03
1.27
IU
"jf
35.0
33.0
33.0
1.15
0.236
33.67
-0.56
-0.32
C W '•
JG
40.7
40.0
39.9
0.44
0.095
40.20
1.70
N • ..
1.94
JM
27.7
28.4
28.0
0.35
0.083
28.03
-2.51
-2.27
JN
30.7
28.0
28.4
1.46
0.319
29.03
-2.17
-1.93
JP
36.5
36.2
37.7
0.79
0.177
36.80
0.52
0.76
JQ
21.5
29.3
31.3
5.18
1.300
27.37
-2.74
-2.51
JS
48.4
46.7
41.0
3.88
0.874
45.37
3.49
3.73 It
JY
36.3
34.1
34.9
1.11
0.260
35.10
-0.06
0.17
K
30.5
30.4
28.4
1.18
0.248
29.77
-1.91
-1.67
KE
36.7
35.3
34.5
1.11
0.260
35.50
0.07
0.31
KH
33.8
29.6
36.3
3.39
0.791
33.23
-0.71
-0.47
KT
32.0
34.0
36.0
2.00
0.473
34.00
-0.45
-0.21
KX£







:(sr-,w
L
39.2
39.3
40.7
0.84
0.177
39.73
1.54
1.78
LE
44.6
42.3
43.1
1.17
0.272
43.33
2.79
3.03 It
LF
37.0
35.0
34.0
1.53
0.354
35.33
0.02
0.25
LL
32.0
33.1
31.1
1.00
0.236
32.07
-1.12
-0.88
LR
49.8
37.1
38.0
7.09
1.953
41.63
2.20
2.44
LT
39.6
30.1
36.5
4.84
1.233
35.40
0.04
0.28
M
38.0
33.0
37.0
2.65
0.591
36.00
0.25
0.48
MF
40.8
39.8
40.1
0.51
0.118
40.23
1.71
1.95
'Hsr<
' 63i0i
"MM
64i6
0.99
0.213
64.132

10^
MX
ir;
,6Bi#
53.8f
70.1j
ssa
2.763
6&i(N
9.64a

~NAy,

jM
-------
ft 				
13/16 CRD-LV Performance Evaluation: Gross Alpha-Beta in Water, 25-Oct-1996
V-
—	
/
Gross Beta







<
Lab
Res. 1
Res. 2

Exper.
Rng anal

Normalized deviation

Res. 3
Sigma
(R + SR)
Average
(grand-avg)
(known) Tag
NB
32.4
28.1
30.7
2.17
0.508
30.40
-1.69
-1.45

NJ
32.3
30.8
33.8
1.50
0.354
32.30
-1.03
-0.80

NK
37.9
37.2
38.6
0.70
0.165
37.90
0.91
1.14

NO
39.2
44.2
51.4
6.13
1.840
44.93
3.34
3.58
1t_
NP
55;8
65.6
63.9-
474
0.981
58.43
8.02
8.26
X
NT
36.6
36.4
36.0
0.31
0.071
36.33
0.36
0.60

O
34.9
34.6
36.1
0.79
0.177
35.20
-0.03
0.21

OA
39.0
44.0
44.0
2.89
0.591
42.33
2.44
2.68

OB
31.6
29.0
37.5
4.36
1.008
32.70
-0.90
-0.66

OF
29.0
29.0
30.0
0.58
0.118
29.33
-2.06
-1.82

OS
30.0
31.0
33.0
1.53
0.354
31.33
-1.37
-1.13

OT
34.2
35.9
40.1
3.04
0.697
36.73
0.50
0.74

OX








•¦
OY








*
P
33.8
38.9
35.1
2.65
0.602
35.93
0.22
0.46

PA
47.4
53.9
48.8
3.42
0.768
50.03
5.11
5.35
tr
PB
33.3
34.3
33.7
0.50
0.118
33.77
-0.53
-0.29

PG
32.7
34.9
33.4
1.12
0.260
33.67
-0.56
-0.32

PM
39.6
36.1
40.2
2.21
0.484
38.63
1.16
1.40

PQ
38.5
36.8
37.0
0.93
0.201
37.43
0.74
0.98

PR
35.4
36.4
35.7
0.51
0.118
35.83
0.19
0.43

PV
29.0
28.6
30.6
1.06
0.236
29.40
-2.04
-1.80

Q
37.4
36.0
34.7
1.35
0.319
36.03
0.26
0.50

QC








•
QM
43.7
40.1
39.6
2.24
0.484
41.13
2.03
2.26

QP
37.0
36.4
34.5
1.31
0.295
35.97
0.24
0.47

QQ
36.2
37.0
35.5
0.75
0.177
36.23
0.33
0.57

QT
84.3
79.6
77:3
3.57
0.827
80.40
15.63
15.87
X
QU
44.0
36.1
42.9
4.28
0.933
41.00
1.98
2.22

QW
38.8
41.4
42.8
2.03
0.473
41.00
1.98
2.22

QX
43.2
42.2
43.0
0.53
0.118
42.80
2.60
2.84

QZ
38.7
36.1
37.2
1.31
0.307
37.33
0.71
0.95

R
29.4
36.3
28.1
4.41
0.969
31.27
-1.39
-1.15

RB
35.0
34.0
34.0
0.58
0.118
34.33
-0.33
-0.09

RD
36.3
36.9
36.1
0.42
0.095
36.43
0.40
0.64

RF
35.7
36.9
41.5
3.06
0.685
38.03
0.95
1.19

RG
38.0
40.1
34.2
2.99
0.697
37.43
0.74
0.98

RI
38.7
39.0
42.2
1.94
0.413
39.97
1.62
1.86

RK








•
RR








•
RZ
33.6
31.3
29.9
1.87
0.437
31.60
-1.28
-1.04

S
36.0
37.8
36.9
0.90
0.213
36.90
0.56
0.80

sc








- • ¦
SD
31.1
32.6
33.7
1.31
0.307
32.47
-0.98
-0.74

SF
25.0
29.0
22.0
3.51
0.827
25.33
-3.45
-3.21

• =
No data submitted

TAG SYMBOLS

ft s Above control limit
0 -
V-	
Insufficient data
X a
Determined to be an outlier
II = Below control limit
	0
-------
CRD-LV Performance Evaluation: Gross Alpha-Beta in Water, 25-Oct-1996 14/16
Gross Beta








Lab
Res. 1
Res. 2
Res. 3
Exper.
Rng anal

Normalized deviation

Sigma
(R + SR)
Average
(grand-avg)
(known) Tair
SG
35.4
33.1
28.2
3.68
0.851
32.23
-1.06
-0.82

SI
32.0
34.8
32.9
1.43
0.331
33.23
-0.71
-0.47

SL
36.9
34.2
35.0
1.39
0.319
35.37
0.03
0.27

SM
13.2/
13.4
16.9
2.08
0.437
14,50
-7;20
-6.96
it-'
SN









SO
32.4
32.4
32.2
0.12
0.024
32.33
-1.02
-0.79

SR
39.5
43.5
40.9
2.03
0.473
41.30
2.08
2.32

ss
34.1
33.4
35.8
1.23
0.284
34.43
-0.30
-0.06

su
23.5
33.4
28.2
4.95
1.323
28.37
-2.40
-2.16

sv
40.8
41.1
40.7
0.21
0.047
40.87
1.93
2.17

SX
40.8
37.7
35.2
2.81
0.662
37.90
0.91
1.14

sz
33.4
38.6
35.4
2.62
0.614
35.80
0.18
0.42

T
36.4
36.2
35.6
0.42
0.095
36.07
0.27
0.51

TD
33.5
30.1
28.6
2.51
0.579
30.73
-1.58
-1.34

""•TG*
;12
9&3
107.8
13.81
5283
10&30
26;64
25 88

THi .







•'" ¦









• .
TN
40.8
37.5
41.2
2.03
0.437
39.83
1.58
1.81

TO
60.0
39.0
41.0
11.59
3.821
46.67
3.94
4.18
ir
TQ
34.5
34.4
34.4
0.06
0.012
34.43
-0.30
-0.06

TW
27.1
27.7
32.1
2.73
0.591
28.97
-2.19
-1.95

TY
39.3
39.8
40.4
0.55
0.130
39.83
1.58
1.81

U
38.3
37.5
35.8
1.28
0.295
37.20
0.66
0.90

UA








•*- >'s
UE
36.8
39.1
40.8
2.01
0.473
38.90
1.25
1.49

UN:
41.4
• 44;4
68;8
15.03
5.261
5153
5.63
sm

UP
34.6
35.7
33.6
1.05
0.248
34.63
-0.23
0.01

UQ
34.3
35.6
35.0
0.65
0.154
34.97
-0.11
0.13

VA
31.8
25.5
25.1
3.76
0.791
27.47
-2.71
-2.47

VC









VH
46.4
39.3
40.1
3.89
0.839
41.93
2.30
2.54

VI
24.6
25.7
26.8
1.10
0.260
25.70
-3.32
-3.08
I
VJ
814
90^4
87.6
4,60
1.098
86.2i
17.65
17,89
X:.
VO
311
31.9
33.2
1.06
0.248
32.07
-1.12
-0.88

VT








• - *
W
34.9
32.9
34.2
1.01
0.236
34.00
-0.45
-0.21











WH
31.2
26.5
26.5
2.71
0.555
28.07
-2.50
-2.26

WJ
31.2
33.8
30.9
1.59
0.343
31.97
-1.15
-0.91

'wm









wo
37.4
37.4
40.6
1.85
0.378
38.47
1.10
1.34

.WB?"









WR
32.8
33.6
32.3
0.66
0.154
32.90
-0.83
-0.59

W8








'
wu






... .. ,


• a No data submitted '	TAG SYMBOLS	ft a Above control limit
I 0 3 Insufficient data jtei .•	x a Determined to be nn outlier	11 a Below control limit
^	JJ
-------
15 / 16 CRD-LV Performance Evaluation: Gross Alpha-Beta in Water, 25-Oct-1996
Gross Beta
_	Exper. Rng anal Normalized deviation
ab	Rea l Res. 2	Res. 3 Sigma (R + SR) Average (grand-ave) (known) Tae
wv					——
WW 31.2 27.0	27.1 2.40 0.496 28.43 -2.37 -2.14
WX 35.0 34.0	34.0 0.58 0.118 34.33 -0 33 -0 09
WY	" #
X 33.2 32.7	34.6 0.98 0.224 33.50 -0.62 -0 38
XB
Data sorted by Laboratory Average
Average
Tag
Lab
Average
Tag
Lab
Average
Tag
Lab
14.50
X
SM
32.20

AL
34.97

FF
21.17
w.
CO
32.23

SG
35.10

JY
25.33
u
SF
32.27

CG
35.20

O
25.70
u
VI
32.30

NJ
35.33

LF
26.23

AE
32.33

SO
35.37

SL
27.37

JQ
32.40

AJ
35.40

LT
27.47

VA
32.47

SD
35.40

HL
28.03

JM
32.67

FL
35.50

KE
28.07

WH
32.70

OB
35.57

BO
28.37

su
32.90

WR
35.77

BA
28.43

WW
32.93

AK
35.80

SZ
28.73

FZ
33.07

CE
35.83

DD
28.97

TW
33.23

SI
35.83

PR
29.03

JN
33.23

KH
35.93

P
29.33

OF
33.23

BB
35.97

QP
29.37

BC
33.40

A
36.00

M
29.40

PV
33.50

X
36.03

Q
29.77

K
33.50

I
36.07

T
30.00

CX
33.67

PG
36.17

EV
30.40

NB
33.67

IU
36.23

QQ
30.73

TD
33.67

HI
36.23

AP
30.87

DB
33.77

PB
36.33

NT
31.03

DS
33.97

BH
36.33

DO
31.27

R
34.00

KT
36.43

RD
31.33

OS
34.00

W
36.67

EO
31.33

BN
34.20

CS
36.67

AU
3i.37

FE
34.33

WX
36.70

DT
31.60

RZ
34.33

RB
36.73

OT
31.97

WJ
34.43

TQ
36.80

JP
31.97

DE
34.43

SS
36.90

S
32.00

CA
34.57

EL
37.17

DH
32.07

LL
34.63

UP
37.20

U
32.07

VO
34.63

BS
37.33

QZ
32.17

DZ
34.73

HP
37.40

AW
32.17

C
34.87

E
37.43

RG
32.20

AZ
34.97

UQ
37.43

PQ
• s No data submitted	TAG SYMBOLS	IT = Above control limit
0 a Insufficient data	x = Determined to be an outlier	It = Below control limit
-------
CRD-LV Performance Evaluation: Gross Alpha-Beta in Water, 25-Oct-1996 10 /18
Gross Beta
Average
37.43
37.47
37.90
37.90
38.03
38.27
38.47
38.63
38.90
38.93
39.00
39.00
39.03
39.10
39.27
39.60
39.67
.laiL
Lab
% responding labs
I
BG
D
SX
NK
RF
ID
WO
PM
UE
EX
FN
AF
GQ
BK
GZ
HK
CJ
Data sorted by Laboratory Average
Average	Tag	Lab Average
39.73
39.83
39.83
39.97
40.20
40.20
40.23
40.27
40.43
40.47
40.80
40.87
41.00
41.00
41.13
41.30
41.63
L
TY
TN
RI
JG
GT
MF
EB
DR
AR
BM
SV
QW
QU
QM
SR
LR
41.93
42.00
42.33
42.80
43.33
44.93
46.37
46.67
50.03
51.53
54.33
58.43
63.10
64.13
80.40
86.23
109.30
Frequency distribution
Tag
ir
tr
tr
it
ir
X
X
X
X
X
X
X
X
Lab
VH
BL
OA
QX
LE
NO
JS
TO
PA
UN
NA
NP
MX
MV
QT
VJ
TG
Jflu


mMm
-4	-2	0	+2	*4
Normalized deviation of the mean from the known value
+6
% responding labs	Frequency distribution
^ .	"f
' Z
Normalized deviation of the mean from the grand average
• a No data submitted TAG SYMBOLS IT a Above control limit
[^g^josuflGcient data 	x = Deterxnined ttyreanoutlier 	ll_a_B^owjcontroHimit_^
-------
United States	Office of Research and	EPA/600/R-97/002
Environmental Protection Development	January 1997
Agency	Washington, DC 20460
<&EPA Gamma in Water
Performance Evaluation
Study
A Statistical Evaluation of
the November 8, 1996 Data
-------
Gamma in Water
Performance Evaluation Study
November 8, 1996
Environmental Protection Agency
National Exposure Research Laboratory
Characterization Research Division
Las Vegas, Nevada
-------
UNITED STATES ENVIRONMENTAL PROTECTION AGENCY
OFFICE OF RESEARCH AND DEVELOPMENT
NATIONAL EXPOSURE RESEARCH LABORATORY
CHARACTERIZATION RESEARCH OIVISION-LAS VEGAS
P.O. BOX 93478
LAS VEGAS, NEVADA 89193-3478
(702/798-2100)
Dear Participant,
Enclosed are the results of the Analytical Sciences Branch (CRD-LV)
Performance Evaluation Study for Gamma In Water; November 8, 1996.
The known value for each analysis was determined by gravimetric methods,
checked by chemical analyses performed by CRD-LV's Radiochemistry Laboratory,
and compared to the participating laboratories' grand average.
The expected precision, determined by the known value, was taken from
'Table 3. Laboratory Precision: One Standard Deviation Values and Control Limits
for Various Analyses", which is based on data accumulated over the years by the
Performance Evaluation Program, and can be found in the Environmental Radioactivity
Performance Evaluation Studies Program and Radioactive Standards Distribution
Program information brochure.
Please take a few minutes to review this report and the analytical data your
laboratory submitted to us. If there are any apparent discrepancies, please notify us
immediately.
We encourage you to make use of the computer-automated data-entry system
that has been in place for some time now. As the number of participants increases,
and it becomes unrealistic for us to receive results by mail or FAX, the computer
system will be our only avenue for accepting data.
If you have any questions or comments, please send a message via the data-entry
system or contact Stephen Pla at 702/798-2102 or Patricia Honsa at 702/798-2141.
Sincerely,
Stephen Pla
Team Leader
RADQA Program
Enclosure
-------
NOTICE
This material has been funded wholly by
the U.S. Environmental Protection Agency.
It has been subjected to the Agency's review,
and has been approved for publication as
an EPA document.
-------
CRD-LV Performance Evaluation: Gamma in Water, 8-Nov-1996
1/37
The following pages consist of separate sections for each of the nuclides in this study with four
parts per section. After the first, each part is separated from the next by a new pnpe or a thick
horizontal bar. The first page of each section is a statistical summary for the nuclide and starts
with a statement of the known value, the control limits, and the warning limits
The warning limits are placed at two normalized standard deviations above and below the
known value and the control limits are three normalized standard deviations above and below
the known value. If you keep control charts, these values will be useful for anticipating problems
with the accuracy of your analytical methods.
The coin shaped pie chart at the top of the summary page shows the fate of all the samples
sent out in number and percentage terms. The pie chart starts at the top and rotates clockwise.
The first sector represents those participants who submitted analytical results within both the
warning and control limits. The next sector represents those who are in the warning region but
not out of control. The third sector represents those who are out of control, but have passed
the outlier test. The fourth sector represents those who have failed the outlier test. The last
sector represents those participants who have failed to respond properly. This is the case if no
analytical results were returned, or less than three determinations were reported, or if the results
were received too late. The reeding on the edge of the coin is spaced at one percent intervals, and
the sector shading becomes darker as the data reliability decreases. Sectors with zero width are
not shown.
The table in the center shows a number of statistical quantities calculated from the submitted
data based on the mean and median values in relation to the known value, both before and after
outlier removal. The lower pie chart uses the same construction as the upper chart and shows
the distribution of properly submitted data in terms of deviation from the known value divided
into sectors representing one, two, three, and greater than three normalized standard deviations.
The second part is an alphabetical listing, in lab-code order, of submitted data and several
calculated quantities. An entry that is shaded has been rejected because of one of the reasons
listed above or failure of the outlier test. The fifth and sixth columns are a measure of laboratory
precision. The Range analysis is a normalized value that you may use to keep precision control
charts. The eighth and ninth columns are the differences from the mean of all non-outliers and
from the known value, respectively. If this value is between 2.0 and 3.0, your analytical process
precision is in the warning zone; if it exceeds 3.0 it is out of control. A tag symbol may appear in
the last column. Each page with tags has a symbol definition summary at the bottom. If there is
no tag symbol, the data is within the control limits, but it may be in the warning zone.
The third part is a three-column listing of result average, tag symbol, and lab-code in average
order excluding those labs not responding properly. In this order, all outliers and out-of-control
results appear at the top or bottom of the list.
The last part is two bar chart displays showing frequency distributions of responding
participants. The first chart places the known value at the center and a bar at each 0.2 unit of
expected precision. The second chart places the mean of the reported measurements at the center
and a bar at each 0.2 unit of standard deviation. In both cases, a bar includes those results within
0.1 unit up to the maximum of six. Any results more than six units from the center value are
shown cumulatively by a shaded bar one past the sixth unit. If the central tendency of the known
value distribution falls away from the center, an error in accuracy is indicated. If the distribution
is broad, poor precision is indicated. The mean value distribution is similar but uses the average
and standard deviation of reported results as its basis.
-------
2/37	CRD-LV Performance Evaluation: Gamma in Water, 8-Nov-1996
The Range Analysis(R + SR) is calculated from the range, mean range and standard error of
the range values. The range is the difference between the maximum and minimum results fnr the
laboratory. The mean range is calculated by multiplying the expected precision by 1.693(for three
results). The standard error of the range is calculated by multiplying the mean range by 2.575(for
three results), subtracting the mean range from this product, and dividing the result by 3. If the
range is greater than the mean range, then the range analysis is calculated by subtracting the
mean range from the range, dividing the result by the standard error of the range and adding 1.
If the mean range is greater than or equal to the range, then the range analysis is calculated by
dividing the range by the mean range.
The normalized deviation of the mean from the grand average is calculated from the deviation
of the mean from the grand average and the standard error of the mean values. The deviation of
the mean from the grand average is calculated by subtracting the grand average from the
average of the laboratory's three results. The standard error of the mean is calculated by
dividing the expected precision by the square root of 3(the number of results). The normalized
deviation of the mean from the grand average is calculated by dividing the deviation of the mean
from the grand average by the standard error of the mean.
The normalized deviation of the mean from the known value is calculated from the deviation of
the mean from the known value and the standard error of the mean values. The deviation of the
mean from the known value is calculated by subtracting the known value from the average of the
laboratory's three results. The standard error of the mean is calculated by dividing the expected
precision by the square root of 3(the number of results). The normalized deviation of the mean
from the known value is calculated by dividing the deviation of the mean from the known value by
the standard error of the mean.
A complete explanation of the statistical calculations involved in the report may be found in
the Environmental Radioactivity Performance Evaluation Studies Program information brochure
[Draft Revision of EPA-600/4-81-004], available from Patricia Honsa, CRD-LV, 702/798-2141.
-------
CRD-LV Performance Evaluation: Gamma in Water, 8-Nov-1996	3/37
Cobalt-60	Statistical Summary	169 Participants
The known value of this nuclide is 44.0 pCi/l with an expected precision of 5.0; the control limits
are 35.3 to 52.7; the warning regions are 35.3 to 38.2 and 49.8 to 52.7
Statistic	Respondents	Non-outliers
Mean
46.77
Grand Avg 44.53
Std. Dev.
25.41
2.87
Variance
645.52
8.24
% Coef. ofVar.
54.33
6.45
% deviation of mean from known value
6.29
1.21
Norm. dev. of mean from known value
0.11
0.19
Median
44.33
44.33
% deviation of median from known value
0.76
0.76
Norm. dev. of median from known value
0.01
0.12
-------
CRD-LV Performance Evaluation: Gamma in Water, 8-Nov-1996
Cobalt-GO
Lab
Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average.
Normalized deviation
(grand-avg) (known) Tae
A
42.0
44.0
42.0
1.15
0.236
42.67
-0.65
-0.46
AE
47.0
46.0
46.0
0.58
0.118
46.33
0.62
0.81
AF
44.0
45.0
47.0
1.53
0.354
45.33
0.28
0.46
AH
44.0
41.0
43.0
1.53
0.354
42.67
-0.65
-0.46
A1
40.0
39.0
41.0
1.00
0.236
40.00
-1.57
-1.39
AJ
44.0
45.0
44.0
0.58
0.118
44.33
-0.07
0.12
AK
45.0
45.0
45.0
0.00
0.000
45.00
0.16
0.35
AL
44.0
44.0
42.0
1,15
0.236
43.33
-0.42
-0.23
AP







0 '
AU
43.0
43.0
41.0
1.15
0.236
42.33
-0.76
-0.58
AW
43.0
44.0
48.0
2.65
0.591
45.00
0.16
0.35
AY
40.0
40.0
40.0
0.00
0.000
40.00
-1.57
-1.39
AZ
46.0
44.0
45.0
1.00
0.236
45.00
0.16
0.35
BA
50.0
51.0
48.0
1.53
0.354
49.67
1.78
1.96
BB
46.0
47.0
45.0
1.00
0.236
46.00
0.51
0.69
BC
44.0
43.0
38.0
3.21
0.709
41.67
-0.99
-0.81
B 0







• -
BH
48.0
47.0
47.0
0.58
0.118
47.33
0.97
1.15
BK
45.0
45.0
45.0
0.00
0.000
45.00
0.16
0.35
BL
42.0
44.0
45.0
1.53
0.354
43.67
-0.30
-0.12
BM
43.0
42.0
42.0
0.58
0.118
42.33
-0.76
-0.58
BN








BO
44.0
43.0
46.0
1.53
0.354
44.33
-0.07
0.12
BW







e
C
46.0
45.0
48.0
1.73
0.354
46.00
0.51
0.69
CA
45.0
45.0
46.0
0 58
0.118
45.33
0.28
0.46
CC
50.0
50.0
50.0
0.00
0.000
50.00
1.89
2.08
CE
43.0
42.0
43.0
0.58
0.118
42.67
-0.65
-0.46
CJ
45.0
44.0
45.0
0.58
0.118
44.67
0.05
0.23
CM







•
CO







•
cs
46.0
46.0
45.0
0.58
0.118
45.67
0.39
0,58
cx
50.0
41.0
44.0
4.58
1.120
45.00
0.16
0.35
o
45.0
43.0
44.0
1.00
0.236
44.00
-0.19
0.00
DD
41.0
40.0
42.0
1.00
0.236
41.00
-1.22
-1.04
DE
43.0
44.0
45.0
1.00
0.236
44.00
-0.19
0.00
DH
44.0
45.0
44.0
0.58
0.118
44.33
-0.07
0.12
DO
51.0
52.0
48.0
2.08
0.473
50.33
2.01
2.19
DR
43.0
44.0
43.0
0.58
0.118
43.33
-0.42
-0.23
DT
45.0
44.0
45.0
0.58
0.118
44.67
0.05
0.23
DZ








E
43.0
43.0
43.0
0.00
0.000
43.00
-0.53
-0.35
EA
43.0
42.0
42.0
0.58
0.118
42.33
-0.76
-0.58
EB
41.0
41.0
41.0
0.00
0.000
41.00
-1.22
-1.04
EL
44.0
44.0
43.0
0.58
0.118
43.67
-0.30
-0.12
* =
No data submitted

TAG SYMBOLS

fl s Above control limit
(05 Insufficient data	x = Determined to be an outlier	II s Below control limit J
-------
CRD-LV Performance Evaluation: Gamma in Water, 8-Nov-1996
5/37
Cobalt-60
Lab Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known) Tog
EW




- •



EX
42.0
48.0
44.0
3.06
0.709
44.67
0.05
0.23
FE
43.0
45.0
48.0
2.52
0.591
45.33
0.28
0.46
FJ
42.0
45.0
43.0
1.53
0.354
43.33
-0.42
-0.23
FL
46.0
43.0
44.0
1.53
0.354
44.33
-0.07
0.12
FZ
41.0
45.0
43.0
2.00
0.473
43.00
-0.53
-0.35
GI
44.0
43.0
45.0
1.00
0.236
44.00
-0.19
0.00
GL
44.0
44.0
41.0
1.73
0.354
43.00
-0.53
-0.35
GQ
44.0
45.0
44.0
0.58
0.118
44.33
-0.07
0.12
m
45.0
50.0
51.0
3.21
0.709
48.67
1.43
1.62
HK
45.0
45.0
45.0
0.00
0.000
45.00
0.16
0.35
HL
26;0
25.0
24.0
1.00
0.236
26.00
-6;77
-6.58 x
HP
47.0
44.0
48.0
2.08
0.473
46.33
0.62
0.81
HX
45.0
44.0
41.0
2.08
0.473
43.33
-0.42
-0.23
I
44.0
43.0
45.0
1.00
0.236
44.00
-0.19
0.00
iu
J
44.0
44.0
44.0
ooo
0.000
44.00
-0.19
0.00
JE
44.0
45.0
45.0
0.58
0.118
44.67
0.05
•
0.23
JG
38.0
39.0
41.0
1.53
0.354
39.33
-1.80
-1.62
JM
45.0
45.0
46.0
0.58
0.118
45.33
0.28
0.46
JS
45.0
44.0
46.0
1.00
0.236
45.00
0.16
0.35
JY
55.0
44.0
51.0
5.57
1.570
50.00
1.89
2.08
K
38.0
40.0
42.0
2.00
0.473
40.00
-1.57
-1.39
KH
46.0
47.0
44.0
1.53
0.354
45.67
0.39
0.58
KL
44.0
45.0
46.0
1.00
0.236
45.00
0.16
0.35
KX
43.0
46.0
43.0
1.73
0.354
44.00
-0.19
0.00
L
44.0
44.0
43.0
0.58
0.118
43.67
-0.30
-0.12
LE
45.0
47.0
49.0
2.00
0.473
47.00
0.85
1.04
LF
46.0
45.0
46.0
0.58
0.118
45.67
0.39
0.58
LR
47.0
46.0
42.0
2.65
0.591
45.00
0.16
0.35
LT
41.0
44.0
41.0
1.73
0.354
42.00
-0.88
-0.69
M
41.0
43.0
42.0
1.00
0.236
42.00
-0.88
-0.69
MP
44.0
41.0
43.0
1.53
0.354
42.67
-0.65
-0.46
MV
46.0
42.0
44.0
2.00
0.473
44.00
-0.19
0.00
MX
44.0
47.0
44.0
1.73
0.354
45.00
0.16
0.35
N
44.0
44.0
45.0
0.58
0.118
44.33
-0.07
012
NH







. j
NJ
43.0
46.0
410
2.52
0.591
43.33
-0.42
-0.23
NK
38.0
41.0
43.0
2.52
0.591
40.67
-1.34
"115
NO








O
49.0
49.0
48.0
0.58
0.118
48.67
1.43
1.62
OAv
340.0
350.0
350.0
5.77
1.345
346.67
104.6*
104.85 x- :
OB
43.0
43.0
44.0
0.58
0.118
43.33
-0.42
-0.23
OK








OM
39.0
35.0
36.0
2.08
0.473
36.67
-2.73
-2.54
• =
1 0a
No data submitted
Insufficient data • -
X S
TAG SYMBOLS
Determined to be an outlier
' ¦¦¦ IT => 'Above control limit
1 C?J ^ ^Below control limit ,
-------
6/37
CRD-LV Performance Evaluation: Gamma in Water,
8-Nov-1996

Njs
Cobalt-60







\
Lab
Res. 1
Res. 2

Exper.
Rng anal

Normalized deviation

Res. 3
Sigma
(R + SR)
Average
(grand-avg) (known) Tag
OT:
A







t ^ '
P
46.0
42.0
44.0
2.00
0.473
44.00
-0.19
0.00

PB
46.0
46.0
45.0
0.58
0.118
45.33
0.28
0.46

PE
48.0
46.0
50.0
2.00
0.473
48.00
1.20
1.39

PM
50.0
44.0
42.0
4.16
0.945
45.33
0.28
0.46

PQ







• - .
PU
50.0
50.0
50.0
0.00
0.000
50.00
1.89
2.08

PV
50.0
41.0
49.0
4.93
1.120
46.67
0.74
0.92

PW
43.0
45.0
45.0
1.15
0.236
44.33
-0.07
0.12

PX
43.0
42.0
42.0
0.58
0.118
42.33
-0.76
-0.58

Q
42.0
43.0
44.0
1.00
0.236
43.00
-0.53
-0.35

QM
37.0
45.0
42.0
4.04
0.945
41.33
-1.11
-0.92

QP
42.0
40.0
43.0
1.53
0.354
41.67
-0.99
-0.81

QT
43.0
41.0
42.0
1.00
0.236
42.00
-0.88
-0.69

QU
43.0
42.0
45.0
1.53
0.354
43.33
-0.42
-0.23

QW
44.0
41.0
45.0
2.08
0.473
43.33
-0.42
-0.23

QX
52.0
50.0
51.0
1.00
0.236
51.00
2.24
2.42

QZ
42.0
42.0
46.0
2.31
0.473
43.33
-0.42
-0.23

R
45.0
44.0
45.0
0.58
0.118
44.67
0.05
0.23

RF
44.0
41.0
40.0
2.08
0.473
41.67
-0.99
-0.81

RH









RK








• -
RO
44.0
46.0
45.0
1.00
0.236
45.00
0.16
0.35

RR
40.0
44.0
45.0
2.65
0.591
43.00
-0.53
-0.35

RU
41.0
42.0
41.0
0.58
0.118
41.33
-1.11
-0.92

RX
50.0
46.0
48.0
2.00
0.473
48.00
1.20
1.39

HZ









S
42.0
42.0
41.0
0.58
0.118
41.67
-0.99
-0.81

sc
43.0
43.0
41.0
1.15
0.236
42.33
-0.76
-0.58

SD
46.0
46.0
46.0
0.00
0.000
46.00
0.51
0.69

SF
44.0
43.0
44.0
0.58
0.118
43.67
-0.30
-0.12

SI
46.0
42.0
42.0
2.31
0.473
43.33
-0.42
-0.23

SM
46.0
45.0
46.0
0.58
0.118
45.67
0.39
0.58

SN
40.0
40.0
41.0
0.58
0.118
40.33
-1.46
-1.27

SR
49.0
45.0
45.0
2.31
0.473
46.33
0.62
0.81

ss
46.0
48.0
43.0
2.52
0.591
45.67
0.39
0.58

sv
47.0
46.0
46.0
0.58
0.118
46.33
0.62
0.81

sx
42.0
40.0
44.0
2.00
0.473
42.00
-0.88
-0.69

sz
43.0
43.0
43.0
0.00
0.000
43.00
-0.53
-0.35

T
40.0
47.0
47.0
4.04
0.827
44.67
0.05
0.23

TC
50.0
53.0
52.0
1.53
0.354
51.67
2.47
2.66

TD
49.0
48.0
45.0
2.08
0.473
47.33
0.97
1.15

TH








• *'
TL








•V '
TO
70.0
66.0
66.0
2.65
0.591
67.00
7.78 "
7.97
X
• =
No data submitted

TAG SYMBOLS

IT = Above control limit
0 -
^	
Insufficient data
x =
Determined to be an outlier
U = Below control limit
-------
CRD-LV Performance Evaluation: Gamma in Water,
8-Nov-1996
7/37
Cobalt-60
Lab Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known)
Tag
TQ
43.0
42.0
43.0
0.58
0.118
42.67
-0.65
-0.46

TR '
58.0
68.0
64.0
5.03
1.345
63.33
6.51
6,70
X
TS
46.0
54.0
52.0
4.16
0.945
50.67
2.12
2.31

U
44.0
44.0
43.0
0.58
0.118
43.67
-0.30
-0.12

UE
43.0
43.0
44.0
0.58
0.118
43.33
-0.42
-0.23

UN








• ¦-
UP
47.0
47.0
46.0
0.58
0.118
46.67
0.74
0.92

UB









xrii









uv
51.0
45.0
46.0
3.21
0.709
47.33
0.97
1.15

ux
42.0
41.0
41.0
0.58
0.118
41.33
-1.11
-0.92

VA
49.0
44.0
47.0
2.52
0.591
46.67
0.74
0.92

vc
49.0
44,0
40.0
4.51
1.120
44.33
-0.07
0.12

VE
49.0
490
46.0
1.73
0.354
48.00
1.20
1.39
•
VH
47.0
42.0
50.0
4.04
0.945
46.33
0.62
0.81

VI
45.0
46.0
46.0
0.58
0.118
45.67
0.39
0.58

VM
44.0
40.0
44.0
2.31
0.473
42.67
-0.65
-0.46

VO
48.0
45.0
43.0
2.52
0.591
45.33
0.28
0.46

vs
48.0
48.0
49.0
0.58
0.118
48.33
1.32
1.50

w
41.0
43.0
38.0
2.52
0.591
40.67
-1.34
-1.15

WD
46.0
44.0
47.0
1.53
0.354
45.67
0.39
0.58

WI
49.0
62.0
42.0
10.15
3.596
51.00
2.24
2.42

WJ
46.0
43.0
40.0
3.00
0.709
43.00
-0.53
-0.35

WK
42.0
42.0
42.0
0.00
0.000
42.00
-0.86
-0.69

WO
35.0
36.0
39.0
2.08
0.473
36.67
-2.73
-2.54

WR
41.0
42.0
44.0
1.53
0.354
42.33
-0.76
-0.58

WS
45.0
47.0
44.0
1.53
0.354
45.33
0.28
0.46

WV
44.0
44.0
42.0
1.15
0.236
43.33
-0.42
-0.23

WW
43.0
42.0
39.0
2.08
0.473
41.33
-1.11
-0.92

WX
52.0
55.0
53.0
1.53
0.354
53.33
3.05
3.23
tt
WY








•
X
51.0
53.0
52.0
1.00
0.236
52.00
2.59
2.77

XA
53.0
50.0
52.0
1.53
0.354
51.67
2.47
2.66

XB

•






•
Data sorted by Laboratory Average
Average
Tag
Lab
Average
Tag
Lab
Average
Tag
Lab
25.00
X
HL
40.67

W
41.67

S
36.67

WO
40.67

NK
41.67

RF
36.67

OM
41.00

EB
41.67

QP
39.33

JG
41.00

DD
41.67

BC
40.00

K
41.33

WW
42.00

WK
40.00

AY
41.33

UX
42.00

SX
40.00

AI
41.33

RU
42.00

QT
40.33

SN
41.33

QM
42.00

M
• = No data submitted
0 s Insufficient data
TAG SYMBOLS
x = Determined to be an outlier
tT s Above control limit
JJ- = Below control limit
-------
ft	—
8/37
Cobalt-60
CRD-LV Performance Evaluation: Gamma in Water, 8-Nov-1998
Data sorted by Laboratory Average
Average
Tag
Lab
Average
Tag
Lab
Average
Tasr
Lab
42.00

LT
44.00

ru
45.67

SS
42.33

WR
44.00

i
45.67

SM
42.33

sc
44.00

GI
45.67

LF
42.33

PX
44.00

DE
45.67

KH
42.33

EA
44.00

D
45.67

CS
42.33

BM
44.33

VC
46.00

SD
42.33

AU
44.33

PW
46.00

C
42.67

VM
44.33

N
46.00

BB
42.67

TQ
44.33

GQ
46.33

VH
42.67

MP
44.33

FL
46.33

sv
42.67

CE
44.33

DH
46.33

SR
42.67

AH
44.33

BO
46.33

HP
42.67

A
44.33

AJ
46.33

AE
43.00

WJ
44.67

T
46.67

VA
43.00

sz
44.67

R
46.67

UP
43.00

RR
44.67

eTE
46.67

PV
43.00

Q
44.67

EX
47.00

LE
43.00

GL
44.67

DT
47.33

uv
43.00

FZ
44.67

CJ
47.33

TD
43.00

E
45.00

RO
47.33

BH
43,33

WV
45.00

MX
48.00

VE
43.33

UE
45.00

LR
48.00

RX
43.33

SI
45.00

KL
48.00

PE
43.33

QZ
45.00

JS
48.33

vs
43.33

QW
45.00

HK
48.67

o
43.33

QU
45.00

CX
48.67

HI
43.33

OB
45.00

BK
49.67

BA
43.33

NJ
45.00

AZ
50.00

PU
43.33

HX
45.00

AW
50.00

JY
43.33

FJ
45.00

AK
50.00

CC
43.33

DR
45.33

WS
50.33

DO
43.33

AL
45.33

vo
50.67

TS
43.67

U
45.33

PM
51.00

WI
43 67

SF
45.33

PB
51.00

QX
43.67

L
45.33

JM
51.67

XA
43.67

EL
45.33

FE
51.67

TC
43.67

BL
45.33

CA
52.00

X
44.00

P
45.33

AF
53.33
Tf
wx
44.00

MV
45.67

WD
63.33
X
TR
44.00

KX
45.67

VI
67.00
346.67
X
X
TO
OA
• = No data submitted

TAG SYMBOLS

ft
s Above control limit
0 = Insufficient data

x = Determined to be an outlier

s Below control limit
-------
CRD-LV Performance Evaluation: Gamma in Water, 8-Nov-1996	9 I 37
Cobalt-60
% responding labs		 Frequency distribution	
ic-
0

•6	-A	-2	0	+2	+4	+6
Normalized deviation of the mean from the known value
responding labs	Frequency distribution	
\0-
¦tii1b|1.i
QJi,	,	¦	, ¦ I ¦¦¦¦f ¦¦¦¦¦¦¦¦ Jf I	T	,	r*
-6	-4	-2	6	+2	+A	+6
Normalized deviation of the mean from the grand average
=y
-------
CRD-LV Performance Evaluation: Gamma in Water, 8-Nov-1996	10/37
Zinc-65	Statistical Summary	169 Participants
The known value of this nuclide is 35.0 pCi/1 with an expected precision of 5.0; the control limits
are 26.3 to 43.7; the warning regions are 26.3 to 29.2 and 40.8 to 43.7
Statistic		Respondents		 Non-outliers
Mean
37.85
Grand Avg 36.08
Std. Dev.
18.99
4.45
Variance
360.67
19.78
% Coef. of Var.
50.17
12.33
% deviation of mean from known value
8.15
3.09
Norm. dev. of mean from known value
0.15
0.24
Median
36.17
36.00
% deviation of median from known value
3.33
2.86
Norm. dev. of median from known value
0.06
0.22
-------
	









	^
11/37
CRD-LV Performance Evaluation: Gamma in Water,
8-Nov-1996


Zinc-65









Lab

Res. 1
Res. 2

Exper.
Rng anal

Normalized deviation


Res. 3
Sigma
(R + SR)
Average
(grand-avg)
(known) Tag
A

34.0
33.0
36.0
1.53
0.354
34.33
-0.61
-0.23

AE

36.0
37.0
36.0
0.58
0.118
36.33
0.09
0.46

AF

34.0
28.0
37.0
4.58
1.120
33.00
-1.07
-0.69

AH

34.0
34.0
37.0
1.73
0.354
35.00
-0.37
0.00

AI

36.0
36.0
36.0
0.00
0.000
36.00
-0.03
0.35

AJ

36.0
38.0
35.0
1.53
0.354
36.33
0.09
0.46

AK

38.0
38.0
35.0
1.73
0.354
37.00
0.32
0.69

AL

46.0t
•p'
CD
62.0:
;8.08
2.695
54.67
6.44
6.81
X
AP










AU

38.0
38.0
33.0
2.89
0.591
36.33
0.09
0.46

AW

35.0
36.0
33.0
1.53
0.354
34.67
-0.49
-0.12

AY

32.0
31.0
33.0
1.00
0.236
32.00
-1.41
-1.04

AZ

37.0
38.0
37.0
0.58
0.118
37.33
0.43
0.81

BA

28.0
33.0
34.0
3.21
0.709
31.67
-1.53
-1.15

BB

38.0
40.0
34.0
3.06
0.709
37.33
0.43
0.81

BC

360
39.0
39.0
1.73
0.354
38.00
0.66
1.04

BG










BH

37.0
39.0
38.0
1.00
0.236
38.00
0.66
1.04

BK

38.0
40.0
38.0
1.15
0.236
38.67
0.90
1.27

BL

34.0
35.0
33.0
1.00
0.236
34.00
-0.72
-0.35

BM

39.0
36.0
39.0
1.73
0.354
38.00
0.66
1.04

BN









•- -
BO

35.0
37.0
36.0
1.00
0.236
36.00
-0.03
0.35

BW









. •
C

34.0
35.0
35.0
0.58
0.118
34.67
-0.49
-0.12

CA

35.0
40.0
36.0
2.65
0.591
37.00
0.32
0.69

CC

36.0
36.0
37.0
0.58
0.118
36.33
0.09
0.46

CE

37.0
37.0
33.0
2.31
0.473
35.67
-0.14
0.23

CJ

39.0
38.0
39.0
0.58
0.118
38.67
0.90
127

CM










CO









•
CS

39.0
37.0
39.0
1.15
0.236
38.33
0.78
1.15

CX

39.0
37.0
35.0
2.00
0.473
37.00
0.32
0.69

D

33.0
42.0
38.0
4.51
1.120
37.67
0.55
0.92

DD

32.0
38.0
36.0
3.06
0.709
35.33
-0.26
0.12

DE

34.0
34.0
35.0
0.58
0.118
34.33
-0.61
-0.23

DH

34.0
35.0
35.0
0.58
0.118
34.67
-0.49
-0.12

DO

32.0
44.0
28.0
8.33
2.695
34.67
-0.49
-0.12

DR

37.0
44.0
40.0
3.51
0.827
40.33
1.47
1.85

DT

37.0
33.°
33.0
2.31
0.473
34.33
-0.61
-°-23

DZ









*
E

37.0
37.0
37.0
0.00
0.000
37.00
0.32
0.69

EA

31.0
30.0
32.0
1.00
0.236
31.00
-1.76
-1.39

EB

36.0
37.0
36.0
0.58
0.118
36.33
0.09
0.46

EL

33.0
36.0
35.0
1.53
0.354
34.67
-0.49
-0.12

• =
No data submitted

TAG SYMBOLS

11 s Above control limit
0 =
V-	
Insufficient data- - -
x =
Determined to be an outlier^
JJ = Below control limit
		
-------
ft'
CRD-LV Performance Evaluation*. Gamma in Water,
8.Nov-19fl«
		
12/37
.
Zinc-65







¦
Lab
Res. 1
Res. 2
Re®. 3
Exper.
Sigma
Rng anal
(ft + SH)
Average
Normalized deviation
(granti-nvg'' (known) Tug
BW








. » - *
EX
30.0
27.0
36.0
4.58
1.120
31.00
-1.76
-1.39

FE
31.0
32.0
35.0
2.08
0.473
32.67
-1.18
-0.81

FJ
39.0
35.0
30.0
451
1.120
34.67
-0.49
-0.12

FL
42.0
37.0
40.0
2.52
0.591
39.67
1.24
1.62

FZ
32.0
37.0
31.0
3.21
0.709
33.33
-0.95
-0.58

GI
37.0
37.0
34.0
1.73
0.354
36.00
-0.03
0.35

GL
38.0
44.0
36.0
4.16
0.945
39.33
1.13
1.50

GQ
40.0
39.0
40.0
0.58
0.118
39.67
1.24
1.62

HI
40.0
44.0
37.0
3.51
0.827
40.33
1.47
1.85

HK
35.0
36.0
36.0
0.58
0.118
35.67
-0.14
0.23

HL
26.0
20.0
21.0
3.21
0.709
22.33
-4.76
-4.39

HP
39.0
43.0
42.0
2.08
0.473
41.33
1.82
2.19

HX
33.0
36.0
34.0
1.53
0.354
34.33
-0.61
-0.23

I
31.0
33.0
35.0
2.00
0.473
33.00
-1.07
-0.69

IU
j.
39.0
37.0
40.0
1.53
0.354
38.67
0.90
1.27

JE
37.0
37.0
39.0
1.15
0.236
37.67
0.55
0.92

JO
30.0
33.0
36X1
3.00
a.709
33.00
-1.07
-0.S9

JM
38.0
39.0
35.0
2.08
0.473
37.33
0.43
0.81

JS
400
38.0
41.0
1.53
0.354
39.67
1.24
1.62

JY
49.0
37.0
60.0
11.50
4.271
48.67
4.36
4.73
ft
K
33.0
32.0
32.0
0.58
0.118
32.33
-1.30
-0.92

KH
33.0
34.0
33.0
0.58
0.118
33.33
-0.95
-0.58

KL
33.0
40.0
30.0
5.13
1.345
34.33
-0.61
-0.23

KX
39.0
37.0
36.0
1.53
0.354
37.33
0.43
0.81

L
32.0
33.0
36.0
2.08
0.473
33.67
-0.84
-0.46

LE
41.0
53.0
42.0
6.66
1.795
45.33
3.21
3.58
tr
LF
40.0
37.0
36.0
2.08
0.473
37 67
0.55
0.92

LR
63.0
43.0
35.0
14.42
5.396
47.00
3.78
4.16
it
LT
35.0
42.0
35.0
4.04
0.827
37.33
0.43
0.81

M
35.0
36.0
36.0
0.58
0.118
35.67
-0.14
0.23

MP
35.0
36.0
31.0
2.65
0.591
34.00
-0.72
-0.35

MV
23.0
22.0
23.0
0.58
0.118
22.67
-4.65
-4.27
u
MX
34.0
34.0
33.0
0.58
0.118
33.67
-0.84
-0.46

N
39.0
40.0
37.0
1.53
0.354
38.67
0.90
JL27 _

NH








" -V
• ¦
NJ
380
30.0
40.0
5.29
1.345
36.00
-0/03
0.35

NK
35.0
29.0
28.0
3.79
0.827
30.67
-1.86
-1.50

NO









O
41.0
41.0
40.0
0.58
0.118
40.67
1.59
1.96

OA
mo
220:0
280.0
32.16
12.596
256.67
76/41 .
1639
* V
ob;








*'
OKI








v.;-
OM
41.0
39.0
42.0
1.53
0.354
40.67
1.59
1.96

• s
No data submitted

TAG SYMBOLS

ft a Above control limit
in*
IK
Insufficient data
x = Determined to be an outlier
¦iV'ii -i	6-rH—n	-	:	—	
11 = Below control limit
	Mi	
-------
ft
13/37

CRD-LV Performance Evaluation: Gamma in Water,
8-Nov-1996

	
Zinc-65









Lab

Res. 1
Res. 2
Res. 3
Exper.
Rng anal

Normalized deviation


Sigma
(R + SR)
Average •
(grand-avg)
(known) Tae
OT










P

39.0
32.0
32.0
4.04
0.827
34.33
-0.61
-0.23

PB

32.0
33.0
34.0
1.00
0.236
33.00
-1.07
-0.69

PE

26.0
35.0
28.0
4.73
1.120
29.67
-2.22
-1.85

PM

40.0
35.0
35.0
2.89
0.591
36.67
0.20
0.58

PQ








• •
PU

36.0
41.0
39.0
2.52
0.591
38.67
0.90
1.27

PV

46.0
40.0
39.0
3.79
0.827
41.67
1.94
2.31

PW

36.0
40.0
38.0
2.00
0.473
38.00
0.66
1.04

PX

34.0
31.0
32.0
1.53
0.354
32.33
-1.30
-0.92

Q

35.0
35.0
36.0
0.58
0.118
35.33
-0.26
0.12

QM

27.0
31.0
33.0
3.06
0.709
30.33
-1.99
-1.62

QP

29.0
28.0
31.0
1.53
0.354
29.33
-2.34
-1.96

QT

21.0
36.0
38.0
9.29
2.921
31.67
-1.53
-1.15

QU

30.0
29.0
23.0
3.79
0.827
27.33
-3.03
-2.66

QW

31.0
27.0
24.0
3.51
0.827
27.33
-3.03
-2.66

QX

38.0
31.0
36.0
3.61
0.827
35.00
-0.37
0.00

QZ

37.0
35.0
38.0
1.53
0.354
36.67
0.20
0.58

R

37.0
36.0
39.0
1.53
0.354
37.33
0.43
0.81

RF

36.0
33.0
35.0
1.53
0.354
34.67
-0.49
-0.12

KB









•
RK









• -
RO

39.0
37.0
39.0
1.15
0.236
38.33
0.78
1.15

RR

40.0
45.0
39.0
3.21
0.709
41.33
1.82
2.19

RU

38.0
31.0
35.0
3.51
0.827
34.67
-0.49
-0.12

RX

40.0
35.0
33.0
3.61
0.827
36.00
-0.03
0.35

RZ









•
S

30.0
31.0
31.0
0.58
0.118
30.67
-1.88
-1.50

sc

39.0
32.0
36.0
3.51
0.827
35.67
-0.14
0.23

SD

34.0
34.0
52.0
10.39
3.146
40.00
1.36
1.73

SF

38.0
41.0
32.0
4.58
1.120
37.00
0.32
0.69

SI

34.0
38.0
36.0
2.00
0.473
36.00
. -0.03
0.35

SM

39.0
42.0
37.0
2.52
0.591
39.33
1.13
1.50

SN

35.0
30.0
32.0
2.52
0.591
32.33
-1.30
-0.92

SR

41.0
42.0
32.0
5.51
1.345
38.33
0.78
1.15

ss

42.0
37.0
37.0
2.89
0.591
38.67
0.90
1.27

sv

41.0
30.0
42.0
6.66
1.795
37.67
0.55
0.92

sx

36.0
39.0
30.0
4.58
1.120
35.00
-0.37
0.00

sz

37.0
33.0
38.0
2.65
0.591
36.00
-0.03
0.35

T

34.0
37.0
38.0
2.08
0.473
36.33
0.09
0.46

TC

49.0
41.0
48.0
4.36
0.945
46.00
3.44
3.81
ir
TD

27.0
19.0
18.0
4.93
1.120
21.33
-5.11
-4.73
ji
TH









•
TL









•-
TO

49.0
46.0
43.0
3.00
0.709
46.00
3.44
3.81
tt
• =
No data submitted

TAG SYMBOLS

It = Above control limit
0 =
Insufficient data
X\ a
; Determined to be an outlier
D- = Belowrcontrol limit
	/j
-------
CRD-LV Performance Evaluation: Gamma in Water, 8-Nov-1996
14/37
Zinc-65
Lab
Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-nvg) (known) Tae
TQ
37.0
31.0
34.0
3.00
0.709
34.00
-0.72
-0.35
TR
41.0
62.0
53.0
10.54
3.821
52.00
5.61
5.89- x
TS
44.0
41.0
45.0
2.08
0.473
43.33
2.51
2.89
U
36.0
36.0
35.0
0.58
0.118
35.67
-0.14
0.23
UE
30.0
34.0
33.0
2.08
0.473
32.33
-1.30
-0.92
UN







' •
UP
40.0
41.0
39.0
1.00
0.236
40.00
1.36
173
UR







~ •
UT







•
UV
28.0
31.0
42.0
7.37
2.245
33.67
-0.84
-0.46
UX
34.0
36.0
36.0
1.15
0.236
35.33
-0.26
0.12
VA
46.0
39.0
34.0
6.03
1.795
39.67
1.24
1.62
VC
41.0
43.0
42.0
1.00
0.236
42.00
2.05
2.42
VE
37.0
39.0
42.0
2.52
0.591
39.33
1.13
1.50
VH
40.0
44.0
45.0
2.65
0.591
43.00
2.40
2.77
VI
30.0
41.0
38.0
5.69
1.570
36.33
0.09
0.46
VM
35.0
35.0
35.0
0.00
0.000
35.00
-0.37
0.00
VO
41.0
40.0
39.0
1.00
0.236
40.00
1.36
1.73
vs
39.0
37.0
31.0
4.16
0.945
35.67
-0.14
0.23
w
22.0
30.0
31.0
4.93
1.120
27.67
-2.91
-2.54
WD
33.0
37.0
31.0
3.06
0.709
33.67
-0.84
-0.46
WI
38.0
58.0
31.0
14.01
5.171
42.33
2.17
2.54
WJ
34.0
41.0
36.0
3.61
0.827
37.00
0.32
0.69
WK
32.0
33.0
33.0
0.58
0.118
32.67
-1.18
-0.81
WO
22.0
25.0
23.0
1.53
0.354
23.33
-4.42
-4.04 Jl
WR
31.0
32.0
38.0
3.79
0.827
33.67
-0.84
-0.46
WS
39.0
34.0
36.0
2.52
0.591
36.33
0.09
0.46
WV
42.0
39.0
41.0
1.53
0.354
40.67
1.59
1.96
WW
38.0
33.0
30.0
4.04
0.945
33.67
-0.84
-0.46
WX
43.0
43.0
43.0
0.00
0.000
43.00
2.40
2.77
WY







•
X
34.0
46.0
38.0
6.11
1.795
39.33
1.13
1.50
XA
46.0
45.0
45.0
0.58
0.118
45.33
3.21
3.58 ft
XB







•
Data sorted by Laboratory Average
Average
Tag
Lab
Average Tag
Lab
Average
Tag Lab
21.33
U
TD
29.67
PE
32.00
AY
22.33
u
HL
30.33
QM
32.33
UE
22.67

MV
30.67
S
32.33
SN
23.33

WO
30.67
NK
32.33
PX
27.33

QW
31.00
EX
32.33
K
27.33

QU
31.00
EA
32.67
WK
27.67

w
31.67
QT
32.67
FE
29.33

QP
31.67
BA
33.00
PB
• s No data submitted

TAG SYMBOLS

tr
s Above control limit
0 = Insufficient data

x = Determined to be an outlier

= Below control limit
-------
'¦ 	
15/37	CRD-LV Performance Evaluation: Gamma in Water, 8-Nov-1996
Zinc-65
Data sorted by Laboratory Average
Average
Tag
Lab
Average
Tag
Lab
Average
Tag
Lab
33.00

JG
35.67

CE
38.33

CS
33.00

1
36.00

SZ
38.67

SS
33.00

AF
36.00

SI
38.67

PU
33.33

KH
36.00

RX
38.67

N
33.33

FZ
36.00

NJ
38.67

IU
33.67

WW
36.00

GI
38.67

CJ
33.67

WR
36.00

BO
38.67

BK
33.67

WD
36.00

AI
39.33

X
33.67

UV
36.33

WS
39.33

VE
33.67

MX
36.33

VI
39.33

SM
33.67

L
36.33

T
39.33

GL
34.00

TQ
36.33

EB
39.67

VA
34.00

MP
36.33

CC
39.67

JS
34.00

BL
36.33

AU
39.67

GQ
34.33

P
36.33

AJ
39.67

FL
34.33

KL
36.33

AE
40.00

VO
34.33

HX
36.67

QZ
40.00

UP
34.33

DT
36.67

PM
40.00

SD
34.33

DE
37.00

WJ
40.33

m
34.33

A
37.00

SF
40.33

DR
34.67

RU
37.00

E
40.67

WV
34.67

RF
37.00

CX
40.67

OM
34.67

FJ
37.00

CA
40.67

O
34.67

EL
37.00

AK
41.33

RR
34.67

DO
37.33

R
41.33

HP
34.67

DH
37.33

LT
41.67

PV
34.67

C
37.33

KX
42.00

VC
34.67

AW
37.33

JM
42.33

WI
35.00

VM
37.33

BB
43.00

WX
35.00

sx
37.33

AZ
43.00

VH
35.00

QX
37.67

SV
43.33

TS
35.00

AH
37.67

LF
45.33
ir
XA
35.33

UX
37.67

JE
45.33
ft
LE
35.33

Q
37.67

D
46.00
it
TO
35.33

DD
38.00

PW
46.00
ft
TC
35.67

VS
38.00

BM
47.00
ft
LR
35.67

u
38.00

BH
48.67
ir
JY
35.67

sc
38.00

BC
52.00
X
TR
35.67

M
38.33

SR
54.67
X
AL
35.67

HK
38.33

RO
256.67
X
OA
• = No data submitted

TAG SYMBOLS

ft
= Above control limit
0 s Insufficient data x = Determined to be an outlier JJ- = Below control limit J
^			 	—
-------
CRD-LV Performance Evaluation: Gamma in Water, 8-Nov-1996	16 / 37
Zinc-65
% responding labs	Frequency distribution
10-
t- -l -t
¦JU
-4	-2	0	+2	+4	+6
Normalized deviation of the mean from the known value
responding labs	Frequency distribution
10-

T —jB»-iyiiijMiii	_ -		—ssi
r " i ——— i
-6	-4	-2	0+2+4	+6
Normalized deviation of the mean from the grand average
-------
CRD-LV Performance Evaluation: Gamma in Water, 8-Nov-1996	17 / 37
Cesium-134	Statistical Summary	169 Participants
The known value of this nuclide is 11.0 pCi/l with an expected precision of 5.0; the control limits
are 2.3 to 19.7; the warning regions are 2.3 to 5.2 and 16.8 to 19.7
Statistic		Respondents	Non-outliers
Mean
11.70
Grand Avg 10.62
Std. Dev.
9.42
1.55
Variance
88.65
2.40
% Coef. of Var.
80.47
14.58
% deviation of mean from known value
6.38
-3.41
Norm. dev. of mean from known value
0.07
-0.24
Median
10.67
10.67
% deviation of median from known value
-3.03
-3.03
Norm. dev. of median from known value
-0.04
-0.22
-------
f(	•—
18/37
CRD-LV Performance Evaluation: Gamma in Water,
8-Nov-1996
	
Cesium-134







Lab
Res. 1
Res. 2

Exper.
Rng anal

Normalized deviation
Res. 3
Sigma
(R + SR)
Average
(grand-avg)
(known) Tag
A
11.0
12.0
10.0
1.00
0.236
11.00
0.13
0.00
AE
10.0
11.0
12.0
1.00
0.236
11.00
0.13
0.00
AF
9.0
8.0
11.0
1.53
0.354
9.33
-0.45
-0.58
AH
10.0
10.0
10.0
0.00
0.000
10.00
-0.22
-0.35
AI
9.0
10.0
10.0
0.58
0.118
9.67
-0.33
-0.46
AJ
9.0
9.0
9.0
0.00
0.000
9.00
-0.56
-0.69
AK
12.0
11.0
11.0
0.58
0.118
11.33
0.25
0.12
AL
12.0
10.0
12.0
115
0.236
11.33
0.25
0.12
AP








AU
11.0
9.0
9.0
1.15
0.236
9.67
-0.33
-0.46
AW
12.0
12.0
11.0
0.58
0.118
11.67
0.36
0.23
AY
10.0
10.0
10.0
0.00
0.000
10.00
-0.22
-0.35
AZ
11.0
11.0
10.0
0.58
0.118
10.67
0.01
-0.12
BA
10.0
11.0
11.0
0.58
0.118
10.67
0.01
-0.12
BB
13.0
10.0
12.0
1.53
0.354
11.67
0.36
0.23
BC
13.0
13.0
120
0.58
0.118
12.67
0.71
0.58
BO







•
BH
11.0
11.0
10.0
0.58
0.118
10.67
0.01
-0.12
BK
10.0
10.0
9.0
0.58
0.118
9.67
-0.33
-0.46
BL
10.0
11.0
11.0
0.58
0.118
10.67
0.01
-0.12
BM
13.0
10.0
11.0
1.53
0.354
11.33
0.25
0.12
BN








BO
12.0
12.0
11.0
0.58
0.118
11.67
0.36
0.23
BW







•
C
11.0
11.0
11.0
0.00
0.000
11.00
0.13
0.00
CA
13.0
11.0
11.0
1.15
0.236
11.67
0.36
0.23
CC
10.0
10.0
10.0
0.00
0.000
10.00
-0.22
-0.35
CE
10.0
9.0
11.0
1.00
0.236
10.00
-0.22
-0.35
CJ
12.0
12.0
12.0
0.00
0.000
12.00
0.48
0.35
CM







•
CO







•
CS
10.0
9.0
9.0
0.58
0.118
9.33
-0.45
-0.58
CX
16.0
8.0
10.0
4.16
0.945
11.33
0.25
0.12
D
12.0
13.0
13.0
0.58
0.118
12.67
0.71
0.58
DD
11.0
12.0
14.0
1.53
0.354
12.33
0.59
0.46
DE
11.0
11.0
11.0
0.00
0.000
11.00
0.13
0.00
DH
10.0
11.0
11.0
0.58
0.118
10.67
0.01
-0.12
DO
17.0
22.0
12.0
5.00
1.345
17.00
2.21
2.08
DR
9.0
10.0
14.0
2.65
0.591
11.00
0.13
0.00
DT
11.0
9.0
8.0
1.53
0.354
9.33
-0.45
-0.58
DZ







• ,
E
10.0
10.0
11.0
0.58
0.118
10.33
-0.10
-0.23
EA
11.0
11.0
12.0
0.58
0.118
11.33
0.25
0.12
EB
9.0
9.0
9.0
0.00
0.000
9.00
-0.56
-0.69
EL
11.0
11.0
11.0
0.00
0.000
11.00
0.13
0.00
• =
No data submitted

TAG SYMBOLS

ft = Above control limit
<3
in
Insufficient data
X 3
Determined to be an outlier
= Below control limit J
¦¦¦ ' " ¦ 1
-------
CRD-LV Performance Evaluation: Gamma in Water, 8-Nov-1996
19/37
Cesium-134
Lab Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known) Tag
KW







•
EX
6.0
9.0
6.0
1.73
0.354
7.00
-1.26
-1.39
FE
11.0
10.0
8.0
1.53
0.354
9.67
-0.33
-0.46
FJ
11.0
13.0
11.0
1.15
0.236
11.67
0.36
0.23
FL
9.0
9.0
11.0
1.15
0.236
9.67
-0.33
-0.46
FZ
11.0
10.0
10.0
0.58
0.118
10.33
-0.10
-0.23
GI
9.0
9.0
10.0
0.58
0.118
9.33
-0.45
-0.58
GL
9.0
9.0
10.0
0.58
0.118
9.33
-0.45
-0.58
GQ
11.0
11.0
10.0
0.58
0.118
10.67
0.01
-0.12
HI
10.0
10.0
13.0
1.73
0.354
11.00
0.13
0.00
HK
10.0
11.0
10.0
0.58
0.118
10.33
-0.10
-0.23
HL
7.0
7.0
6.0
0.58
0.118
6.67
-1.37
-1.50
HP
13.0
12.0
11.0
1.00
0.236
12.00
0.48
0.35
HX
10.0
9.0
9.0
0.58
0.118
9.33
-0.45
-0.58
I
10.0
10.0
9.0
0.58
0.118
9.67
-0.33
-0.46
IU
J:
10.0
12.0
11.0
1.00
0.236
11.00
0.13
0.00
JE
11.0
11.0
11.0
0.00
0.000
11.00
0.13
. -
0.00
JG
7.0
8.0
12.0
2.65
0.591
9.00
-0.56
-0.69
JM
11.0
10.0
11.0
0.58
0.118
10.67
0.01
-0.12
JS
11.0
12.0
12.0
0.58
0.118
11.67
0.36
0.23
JY
16.0
16.0
10.0
3.46
0.709
14.00
1.17
1.04
K
13.0
12.0
11.0
1.00
0.236
12.00
0.48
0.35
KH
10.0
10.0
10.0
0.00
0.000
10.00
-0.22
-0.35
KL
11.0
11.0
11.0
0.00
0.000
11.00
0.13
0.00
KX
12.0
11.0
10.0
1.00
0.236
11.00
0.13
0.00
L
9.0
11.0
10.0
1.00
0.236
10.00
-0.22
-0.35
LE
9.0
20.0
14.0
5.51
1.570
14.33
1.28
1.15
LF
12.0
12.0
11.0
0.58
0.118
11.67
0.36
0.23
LR
10.0
9.0
11.0
1.00
0.236
10.00
-0.22
-0.35
LT
9.0
9.0
11.0
1.15
0.236
9.67
-0.33
-0.46
M
10.0
9.0
9.0
0.58
0.118
9.33
-0.45
-0.58
MP
11.0
10.0
10.0
0.58
0.118
10.33
-0.10
-0.23
MV
9.0
10.0
9.0
0.58
0.118
9.33
-0.45
-0.58
MX
10.0
10.0
11.0
0.58
0.118
10.33
-0.10
-0.23
N
11.0
10.0
10.0
0.58
0.118
10.33
-0.10
-0.23
NH,







• -
NJ
12.0
11.0
10.0
1.00
0.236
11.00
0.13
0.00
NK
9.0
10.0
10.0
0.58
0.118
9.67
-0.33
-0.46
NO








O
12.0
12.0
12.0
0.00
0.000
12.00
0.48
0.35
OA
71.0
71.0
76:0
2.89
0.591
72.67/
2i;49
21.36 *
OB







•
OK







•
OM
12.0
12.0
11.0
0.58
0.118
11.67
0.36
0.23
• =
,03
No data submitted
Insufficient data ^ »-
¦v ;>ii-
•?d tox "s
TAG SYMBOLS
Determined to be an outlier
IT 3 Above control limit
11 = Below control limit
-------
(r
20/37
CRD-LV Performance Evaluation: Gamma in Water,
8-Nov-1996


Cesium-134








Lab
Res. 1
Res. 2

Exper.
Rng anal

Normalized deviation

Res. 3
Sigma
(R + SR)
Average
(grand-avg)
(known) Tag
OTV








•
P
12.0
14.0
13.0
1.00
0.236
13.00
0.82
0.69

PB
10.0
11.0
12.0
1.00
0.236
11.00
0.13
0.00

PE
9.0
7.0
8.0
1.00
0.236
8.00
-0.91
-1.04

PM
10.0
10.0
10.0
0.00
0.000
10.00
-0.22
-0.35

PQ







*
PU
12.0
12.0
11.0
0.58
0.118
11.67
0.36
0.23

PV
12.0
14.0
13.0
1.00
0.236
13.00
0.82
0.69

PW
10.0
10.0
11.0
0.58
0.118
10.33
-0.10
-0.23

PX
11.0
10.0
11.0
0.58
0.118
10.67
0.01
-0.12

Q
10.0
11.0
10.0
0.58
0.118
10.33
-0.10
-0.23

QM
11.0
5.0
13.0
4.16
0.945
9.67
-0.33
-0.46

QP
10.0
10.0
8.0
1.15
0.236
9.33
-0.45
-0.58

QT
15.0
9.0
9.0
3.46
0.709
11.00
0.13
0.00

QU
5.0
8.0
7.0
1.53
0.354
6.67
-1.37
-1.50

QW
6.0
6.0
8.0
1.15
0.236
6.67
-1.37
-1.50

QX
11.0
11.0
11.0
0.00
0.000
11.00
0.13
0.00

QZ
9.0
10.0
9.0
0.58
0.118
9.33
-0.45
-0.58

R
10.0
11.0
10.0
0.58
0.118
10.33
-0.10
-0.23

RF
10.0
11.0
11.0
0.58
0.118
10.67
0.01
-0.12

RH








• -
RK








• ""
RO
9.0
11.0
10.0
1.00
0.236
10.00
-0.22
-0.35

RR
13.0
12.0
11.0
1.00
0.236
12.00
0.48
0.35

RU
9.0
10.0
9.0
0.58
0.118
9.33
-0.45
-0.58

RX
11.0
12.0
12.0
0.58
0.118
11.67
0.36
0.23

RZ








•
S
9.0
9.0
8.0
0.58
0.118
8.67
-0.68
-0.81

sc
9.0
10.0
9.0
0.58
0.118
9.33
-0.45
-0.58

SD
10.0
14.0
12.0
2.00
0.473
12.00
0.48
0.35

SF
10.0
12.0
8.0
2.00
0.473
10.00
-0.22
-0.35

SI
102.0
103.0
106.0?
2.08
0.473
103.67
32.23
32.10
X
SM
12.0
10.0
10.0
1.15
0.236
10.67
0.01
-0.12

SN
11.0
11.0
9.0
1.15
0.236
10.33
-0.10
-0.23

SR
8.0
11.0
12.0
2.08
0.473
10.33
-0.10
-0.23

ss
12.0
12.0
12.0
0.00
0.000
12.00
0.48
0.35

sv
10.0
9.0
9.0
0.58
0.118
9.33
-0.45
-0.58

sx
9.0
11.0
10.0
1.00
0.236
10.00
-0.22
-0.35

sz
10.0
9.0
10.0
0.58
0.118
9.67
-0.33
-0.46

T
10.0
10.0
10.0
0.00
0.000
10.00
-0.22
-0.35

TC
11.0
13.0
11.0
1.15
0.236
11.67
0.36
0.23

TD
11.0
11.0
10.0
0.58
0.118
10.67
0.01
-0.12

m








•
TL








•
TO
15.0
17.0
18.0
1.53
0.354
16.67
2.09
1.96

• a No data submitted

TAG SYMBOLS

IT = Above control limit
0 3 Insufficient data	x = Determined to be an outlier	II = Below control limit
~ vv	' - -	—	
-------
CRD-LV Performance Evaluation: Gamma in Water, 8-Nov-1996
21/37
Cesium-134
Lab Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known)
TQ
10.0
9.0
7.0
1.53
0.354
8.67
-0.68
-0.81
TR
11.0
12.0
12.0
0.58
0.118
11.67
0.36
0.23
TS
15.0
14.0
12.0
1.53
0.354
13.67
1.05
0.92
U
11.0
11.0
10.0
0.58
0.118
10.67
0.01
-0.12
UE
11.0
11.0
11.0
0.00
0.000
11.00
0.13
0.00
un;







UP
9.0
9.0
9.0
0.00
0.000
9.00
-0.56
-0.69
UE








UT








UV
9.0
12.0
8.0
2.08
0.473
9.67
-0.33
-0.46
UX
9.0
10.0
9.0
0.58
0.118
9.33
-0.45
-0.58
VA
13.0
11.0
12.0
1.00
0.236
12.00
0.48
0.35
VC
10.0
12.0
11.0
1.00
0.236
11.00
0.13
0.00
VE
10.0
11.0
11.0
0.58
0.118
10.67
0.01
-0.12
VH
11.0
10.0
12.0
1.00
0.236
11.00
0.13
0.00
VI
11.0
8.0
11.0
1.73
0.354
10.00
-0.22
-0.35
VM
15.0
15.0
15.0
0.00
0.000
15.00
1.52
1.39
VO
11.0
13.0
11.0
1.15
0.236
11.67
0.36
0.23
VS
10.0
11.0
12.0
1.00
0.236
11.00
0.13
0.00
W
11.0
10.0
11.0
0.58
0.118
10.67
0.01
-0.12
WD
10.0
8.0
9.0
1.00
0.236
9.00
-0.56
-0.69
WI
9.0
15.0
13.0
3.06
0.709
12.33
0.59
0.46
WJ
10.0
9.0
9.0
0.58
0.118
9.33
-0.45
-0.58
WK
9.0
10.0
10.0
0.58
0.118
9.67
-0.33
-0.46
WO
17.0
13.0
10.0
3.51
0.827
13.33
0.94
0.81
WR
6.0
8.0
12.0
3.06
0.709
8.67
-0.68
-0.81
WS
9.0
9.0
11.0
1.15
0.236
9.67
-0.33
-0.46
WV
10.0
11.0
11.0
0.58
0.118
10.67
0.01
-0.12
WW
8.0
8.0
9.0
0.58
0.118
8.33
-0.79
-0.92
WX
9.0
11.0
10.0
1.00
0.236
10.00
-0.22
-0.35
WY








X
12.0
10.0
11.0
1.00
0.236
11.00
0.13
0.00
XA
11.0
10.0
11.0
0.58
0.118
10.67
0.01
-0.12
XB








, •
Data sorted by Laboratory Average
Average Tag
Lab
Average Tag 1
Lab
Average
Tag Lab
6.67
QW
8.67
S
9.33
SV
6.67
QU
9.00
WD
9.33
SC
6.67
HL
9.00
UP
9.33
RU
7.00
EX
9.00
JG
9.33
QZ
8.00
PE
9.00
EB
9.33
QP
8.33
WW
9.00
AJ
9.33
MV
8.67
WR
9.33
WJ
9.33
M
8.67
TQ
9.33
UX
9.33
HX
• a No data submitted

TAG SYMBOLS

IT
s Above control limit
0 = Insufficient data

x = Determined to be an outlier
U
5 Below control limit
-------
CRD-LV Performance Evaluation: Gamma in Water, 8-Nov-1996
( 		-	
Cesium-134







Average Tag
Data sorted by Laboratory Averaj
fe


Lab
Average
Tag
Lab
Average
Tag
Lab
9.33
GL
10.33

HK
11.33

CX
9.33
GI
10.33

FZ
11.33

BM
9.33
DT
10.33

E
11.33

AL
9.33
CS
10.67

XA
11.33

AK
9.33
AF
10.67

WV
11.67

VO
9.67
WS
10.67

W
11.67

TR
9.67
WK
10.67

VE
11.67

TC
9.67
UV
10.67

U
11.67

RX
9.67
sz
10.67

TD
11.67

PU
9.67
QM
10.67

SM
11.67

OM
9.67
NK
10.67

RF
11.67

LF
9.67
LT
10.67

PX
11.67

JS
9.67
I
10.67

JM
11.67

FJ
9.67
FL
10.67

GQ
11.67

CA
9.67
FE
10.67

DH
11.67

BO
9.67
BK
10.67

BL
11.67

BB
9.67
AU
10.67

BH
11.67

AW
9.67
AI
10.67

BA
12.00

VA
10.00
WX
10.67

AZ
12.00

ss
10.00
VI
11.00

X
12.00

SD
10.00
T
11.00

VS
12.00

RR
10.00
sx
11.00

VH
12.00

O
10.00
SF
11.00

VC
12.00

K
10.00
RO
11.00

UE
12.00

HP
10.00
PM
11.00

QX
12.00

CJ
10.00
LR
11.00

QT
12.33

WI
10.00
L
11.00

PB
12.33

DD
10.00
KH
11.00

NJ
12.67

D
10.00
CE
11.00

KX
12.67

BC
10.00
CC
11.00

KL
13.00

PV
10.00
AY
11.00

JE
13.00

P
10.00
AH
11.00

IU
13.33

WO
10.33
SR
11.00

HI
13.67

TS
10.33
SN
11.00

EL
14.00

JY
10.33
R
11.00

DR
14.33

LE
10.33
Q
11.00

DE
15.00

VM
10.33
PW
11.00

C
16.67

TO
10.33
N
11.00

AE
17.00

DO
10.33
MX
11.00

A
72.67
X
OA
10.33
MP
11.33

EA
103.67
X
SI
• = No data submitted

TAG SYMBOLS

11
= Above control limit
0 - Insufficient data
^	

x = Determined to be an outlier

= Below control limit
	—				
-------
CRD-LV Performance Evaluation: Gamma in Water, 8-Nov-1996	23 / 37
Cesium-134
%
20
10
0
% responding labs	Frequency distribution
20
10
0
responding labs	Frequency distribution
Al
¦	¦	.	.	, ¦¦	f			
-6	-4	-2	0	+2	u
Normalized deviation of the mean from the known value
Normalized deviation of the mean from the grand average
-------
CRD-LV Performance Evaluation: Gamma in Water, 8-Nov-1998
24/37
Cesium-137	Statistical Summary	169 Participants
The known value of this nuclide is 19.0 pCi/l with an expected precision of 5.0; the control limits
are 10.3 to 27.7; the warning regions are 10,3 to 13.2 and 24.8 to 27.7
24(14.2 %) Failed to respond
137(81.1 %) Within aft limits
7-.
*	a rs.
•	xnv
*v

*	\i\
*	vAV

4(2.4- %) In warning zone
4(2.4 %) Outliers *'

but within control
Statistic
Respondents
Non-outliers
Mean
21.67
Grand Avg 20.38
Std. Dev.
12.46
1.93
Variance
155.28
3.71
%Coef. ofVar.
57.50
9.46
% deviation of mean from known value
14.07
7.14
Norm. dev. of mean from known value
0.21
0.70
Median
20.33
20.33
% deviation of median from known value
7.02
7.02
Norm. dev. of median from known value
0.11
0.69
5(3.4 %) More than 3 norm. S.D.
3(2.1 %) Between 2 and 3 norm. S
. 115(79,3 %) Within 1 norm. S.D.
of Known value

221(15.2 %) Between 1 and 2 norm. S.D.
\i ~ 	ij__				
-------
(c~	
25/37
CRD-LV Performance Evaluation: Gamma in Water,
8-Nov-1996


Cesium«137








Lab
Res. 1
Res. 2

Exper.
Rng anal

Normalized deviation

Res. 3
. Sigma
(R + SR)
Average
(gTand-avg)
(known) Tae
A
18.0
19.0
19.0
0.58
0.118
18.67
-0.59
-0.12

AE
18.0
20.0
20.0
1.15
0.236
19.33
-0.35
0.12

AF
17.0
22.0
23.0
3.21
0.709
20.67
0.11
0.58

AH
21.0
20.0
20.0
0.58
0.118
20.33
-0.01
0.46

AI
19.0
19.0
21.0
1.15
0.236
19.67
-0.24
0.23

AJ
19.0
20.0
20.0
0.58
0.118
19.67
-0.24
0.23

AK
21.0
21.0
22.0
0.58
0.118
21.33
0.34
0.81

AL
22.0
21.0
21.0
0.58
0.118
21.33
0.34
0.81

AP








• ¦
AU
21.0
20.0
20.0
0.58
0.118
20.33
-0.01
0.46

AW
20.0
19.0
19.0
0.58
0.118
19.33
-0.35
0.12

AY
16.0
19.0
20.0
2.08
0.473
18.33
-0,70
-0.23

AZ
20.0
21.0
19.0
1.00
0.236
20.00
-0.12
0.35

BA
18.0
18.0
13.0
2.89
0.591
16.33
-1.39
-0.92

BB
22.0
20.0
22.0
1.15
0.236
21.33
0.34
0.81

BC
18.0
20.0
21.0
1.53
0.354
19.67
-0.24
0.23

BG








•
BH
23.0
22.0
22.0
0.58
0.118
22.33
0.68
1.15

BK
21.0
21.0
20.0
0.58
0.118
20.67
0.11
0.58

BL
20.0
20.0
19.0
0.58
0.118
19.67
-0.24
0.23

BM
17.0
20.0
18.0
1.53
0.354
18.33
-0.70
-0.23

BN








•
BO
19.0
20.0
20.0
0.58
0.118
19.67
-0.24
0.23

BW








•
C
19.0
20.0
20.0
0.58
0.118
19.67
-0.24
0.23

CA
17.0
21.0
21.0
2.31
0.473
19.67
-0.24
0.23

CC
21.0
21.0
21.0
0.00
0.000
21.00
0.22
0.69

CE
23.0
19.0
20.0
2.08
0.473
20.67
0.11
0.58

CJ
20.0
20.0
22.0
1.15
0.236
20.67
0.11
0.58

CM








•
CO








•
CS
21.0
21.0
22.0
0.58
0.118
21.33
0.34
0.81

CX
23.0
22.0
22.0
0.58
0.118
22.33
0.68
1.15

D
18.0
21.0
20.0
1.53
0.354
19.67
-0.24
0.23

DD
20.0
21.0
18.0
1.53
0.354
19.67
-0.24
0.23

DE
19.0
20.0
20.0
0.58
0.118
19.67
-0.24
0.23

DH
20.0
20.0
21.0
0.58
0.118
20.33
-0.01
0.46

DO
19.0
13.0
22.0
4.58
1.120
18.00
-0.82
-0.35

DR
24.0
24.0
21.0
1.73
0.354
23.00
0.92
1.39

DT
22.0
18.0
18.0
2.31
0.473
19.33
-0.35
0.12

DZ








• '
E
20.0
21.0
18.0
1.53
0.354
19.67
-0.24
0.23

EA
180
19.0
20.0
1.00
0.236
19.00
-0.47
0.00

EB
20.0
20.0
20.0
0.00
0.000
20.00
-0.12
0.35

EL
21.0
19.0
20.0
1.00
0.236
20.00
-0.12
0.35

• =
No data submitted

TAG SYMBOLS

ft s Above control limit

Insufficient data
x =
Determined to be an outlier
U s Below control limit
-------
CRD-LV Performance Evaluation: Gamma in Water, 8-Nov-1996
26/37
Cesium-137
Lab Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known) Tag
EW







•
EX
16.0
14.0
13.0
1.53
0.354
14.33
-2.09
-1.62
FE
18.0
24.0
18.0
3.46
0.709
20.00
-0.12
0.35
FJ
17.0
19.0
19.0
1.15
0.236
18.33
-0.70
-0.23
FL
22.0
22.0
19.0
1.73
0.354
21.00
0.22
0.69
FZ
21.0
20.0
20.0
0.58
0.118
20.33
-0.01
0.46
GI
20.0
19.0
20.0
0.58
0.118
19.67
-0.24
0.23
GL
17.0
19.0
18.0
1.00
0.236
18.00
-0.82
-0.35
GQ
20.0
20.0
20.0
0.00
0.000
20.00
-0.12
0.35
m
19.0
19.0
27.0
4.62
0.945
21.67
0.45
0.92
HK
21.0
20.0
22.0
1.00
0.236
21.00
0.22
0.69
HL
16.0
15.0
17.0
1.00
0.236
16.00
-1.51
-1.04
HP
24.0
23.0
24.0
0.58
0.118
23.67
1.15
1.62
HX
19.0
20.0
19.0
0.58
0.118
19.33
-0.35
0.12
I
22.0
21.0
20.0
1.00
0.236
21.00
0.22
0.69
ro
J
20.0
19.0
19.0
0.58
0.118
19.33
-0.35
012
JE
21.0
20.0
21.0
0.58
0.118
20.67
0.11
•
0.58
JG
20.0
20.0
21.0
0.58
0.118
20.33
-0.01
0.46
JM
22.0
20.0
22.0
1.15
0.236
21.33
0.34
0.81
JS
20.0
19.0
21.0
1.00
0.236
20.00
-0.12
0.35
JY
270
310
39.0
6.11
1,795
32.33
4.15
4.62 x
K
23.0
22.0
20.0
1.53
0.354
21.67
0.45
0.92
KH
20.0
21.0
21.0
0.58
0.118
20.67
0.11
0.58
KL
23.0
22.0
19.0
2.08
0.473
21.33
0.34
0.81
KX
22.0
23.0
21.0
1.00
0.236
22.00
0.57
1.04
L
20.0
20.0
20.0
0.00
0.000
20.00
-0.12
0.35
LE
28.0
34.0
21.0
6.51
2.020
27.67
2.53
3.00
LF
20.0
22.0
21.0
1.00
0.236
21.00
0.22
0.69
LE
19.0
22.0
18.0
2.08
0.473
19.67
-0.24
0.23
LT
20.0
18.0
19.0
1.00
0.236
19.00
-0.47
0.00
M
19.0
20.0
21.0
1.00
0.236
20.00
-0.12
0.35
MP
15.0
18.0
16.0
1.53
0.354
16.33
-1.39
-0.92
MV
21.0
25.0
23.0
2.00
0.473
23.00
0.92
1.39
MX
20.0
20.0
20.0
0.00
0.000
20.00
-0.12
0.35
N
20.0
19.0
23.0
2.08
0.473
20.67
0.11
0.58
NH








NJ
16.0
20.0
18.0
2.00
0.473
18.00
-0.82
-0.35
NK
18.0
16.0
17.0
1.00
0.236
17.00
-1.16
-0.69
NO








O
22.0
22.0
22.0
0.00
0.000
22.00
0.57
1.04
OA
162.0
173.0
165.0
5.69
1.570
166.67
5068
¦ 51.15 .x
OB
21.0
18.0
21.0
1.73
0.354
20.00
-0.12
0.35
OK







# -
OM
23.0
21.0
21.0
1.15
0.236
21.67
0.45
0.92
• = No data submitted
0 = Insufficient data
TAG SYMBOLS
x = Determined to be an outlier
IT = Above
j.Ji s. Below
control limit
control limit
-------
f(			'¦—
27 / 3.7
CRD-LV Performance Evaluation: Gamma in Water,
8-Nov-1996

	
Cesium-137







'V
Lab
Res. 1
Res. 2

Exper.
Rng anal

Normalized deviation

Res. 3
Sigma
(R + SR)
Average
(grand-avg)
(known) Tae
OT








• .
P
18.0
16.0
21.0
2.52
0.591
18.33
-0.70
-0.23

PB
20.0
20.0
20.0
0.00
0.000
20.00
-0.12
0.35

PE
26.0
23.0
26.0
1.73
0.354
25.00
1.61
2.08

PM
20.0
21.0
20.0
0.58
0.118
20.33
-0.01
0.46

PQ








• *
PU
24.0
24.0
23.0
0.58
0.118
23.67
1.15
1.62

PV
24.0
23.0
23.0
0.58
0.118
23.33
1.03
1.50

PW
21.0
20.0
22.0
1.00
0.236
21.00
0.22
0.69

PX
18.0
19.0
18.0
0.58
0.118
18.33
-0.70
-0.23

Q
19.0
19.0
18.0
0.58
0.118
18.67
-0.59
-0.12

QM
21.0
24.0
22.0
1.53
0.354
22.33
0.68
1.15

QP
17.0
18.0
18.0
0.58
0.118
17.67
-0.93
-0.46

QT
20.0
20.0
21.0
0.58
0.118
20.33
-0.01
0.46

QU
19.0
18.0
19.0
0.58
0.118
18.67
-0.59
-0.12

QW
18.0
18.0
20.0
1.15
0.236
18.67
-0.59
-0.12

ox
27.0
26.0
26.0
0.58
0.118
26.33
2.07
2.54

QZ
20.0
21.0
20.0
0.58
0.118
20.33
-0.01
0.46

R
22.0
21.0
19.0
1.53
0.354
20.67
0.11
0.58

RF
17.0
18.0
17.0
0.58
0.118
17.33
-1.05
-0.58

RH









RK








9
RO
20.0
22.0
20.0
1.15
0.236
20.67
0.11
0.58

RR
21.0
21.0
21.0
0.00
0.000
21.00
0.22
0.69

RU
18.0
20.0
19.0
1.00
0.236
19.00
-0.47
0.00

RX
22.0
21.0
21.0
0.58
0.118
21.33
0.34
0.81

RZ








9-
S
18.0
19.0
20.0
1.00
0.236
19.00
-0.47
0.00

sc
17.0
20.0
22.0
2.52
0.591
19.67
-0.24
0.23

SD
22.0
18.0
20.0
2.00
0.473
20.00
-0.12
0.35

SF
21.0
22.0
23.0
1.00
0.236
22.00
0.57
1.04

SI
20.0
20.0
22.0
1.15
0.236
20.67
0.11
0.58

SM
22.0
23.0
23.0
0.58
0.118
22.67
0.80
1.27

SN
21.0
21.0
22.0
0.58
0.118
21.33
0.34
0.81

SR
21.0
21.0
19.0
1.15
0.236
20.33
-0.01
0.46

ss
23.0
23.0
21.0
1.15
0.236
22.33
0.68
1.15

sv
20.0
19.0
22.0
1.53
0.354
20.33
-0.01
0.46

sx
18.0
19.0
21.0
1.53
0.354
19.33
-0.35
0.12

sz
19.0
20.0
21.0
1.00
0.236
20.00
-0.12
0.35

T
24.0
23.0
20.0
2.08
0.473
22.33
0.68
1.15

TC
26.0
24.0
24.0
1.15
0.236
24.67
1.49
1.96

TD
17.0
190
160
1.53
0.354
17.33
-1.05
-0.58

TH








•
TL








•
TO
36.0
35.0
32.0
2.08
0.473
34.33
4.84
5.31
X
• =
No data submitted

TAG SYMBOLS

ft s Above control limit
0 =
		
Insufficient data
x =
Determined to be an outlier
11 = Below control limit
-------

CRD-LV Performance Evaluation: Gamma in Water, 8*Nov-1996
28/37
Cesium-137
Lab
Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known)
It*
20.0
17.0
18.0
1.53
0.354
18.33
-0.70
-0.23
TU-
36:o
39.0
42.0
3.00
0.709
39.00
6.46
6.93
TS
25.0
20.0
23.0
2.52
0.591
22.67
0.80
1.27
u
21.0
19.0
20.0
1.00
0.236
20.00
-0.12
0.35
UE
20.0
20.0
20.0
0.00
0.000
20.00
-0.12
0.35
UN.







UP
22.0
20.0
20.0
1.15
0.236
20.67
0.11
0.58
URf







UT/








UV
21.0
20.0
17.0
2.08
0.473
19.33
-0.35
0.12
UX
19.0
19.0
20.0
0.58
0.118
19.33
-0.35
0.12
VA
21.0
22.0
22.0
0.58
0.118
21.67
0.45
0.92
VC
20.0
21.0
19.0
1.00
0.236
20.00
-0.12
0.35
VE
20.0
23.0
22.0
1.53
0.354
21.67
0.45
0.92
VH
19.0
23.0
22.0
2.08
0.473
21.33
0.34
0.81
VI
18.0
22.0
20.0
2.00
0.473
20.00
-0.12
0.35
VM
23.0
23.0
23.0
0.00
0.000
23.00
0.92
1.39
VO
22.0
20.0
19.0
1.53
0.354
20.33
-0.01
0.46
VS
21.0
22.0
23.0
1.00
0.236
22.00
0.57
1.04
W
21.0
18.0
20.0
1.53
0.354
19.67
-0.24
0.23
WD
23.0
19.0
21.0
2.00
0.473
21.00
0.22
0.69
WI
21.0
29.0
20.0
4.93
1.120
23.33
1.03
1.50
WJ
19.0
18.0
16.0
1.53
0.354
17.67
-0.93
-0.46
WK
20.0
18.0
19.0
1.00
0.236
19.00
-0.47
0.00
WO
18.0
16.0
16.0
1.15
0.236
16.67
-1.28
-0.81
WR
19.0
20.0
20.0
0.58
0.118
19.67
-0.24
0.23
WS
23.0
20.0
20.0
1.73
0.354
21.00
0.22
0.69
WV
23.0
20.0
19.0
2.08
0.473
20.67
0.11
0.58
WW
20.0
18.0
17.0
1.53
0.354
18.33
-0.70
-0.23
WX
25.0
28.0
25.0
1.73
0.354
26.00
1.95
2.42
WY








X
20.0
24.0
20.0
2.31
0.473
21.33
0.34
0.81
XA
23.0
22.0
22.0
0.58
0.118
22.33
0.68
1.15
XB








x*
Data sorted by Laboratory Average
Average Tag
Lab
Average Tag
Lab
Average
Tag Lab
14.33
EX
17.67
WJ
18.33
P
16.00
HL
17.67
QP
18.33
FJ
16.33
MP
18.00
NJ
18.33
BM
16.33
BA
18.00
GL
18.33
AY
16.67
WO
18.00
DO
18.67
QW
17.00
NK
18.33
WW
18.67
QU
17.33
TD
18.33
TQ
18.67
Q
17.33
RF
18.33
PX
18.67
A
• s No data submitted

TAG SYMBOLS

IT
s Above control limit
0 s Insufficient data

x = Determined to be an outlier
U
2 Below control limit
-------
29 / 37	CRD-LV Performance Evaluation: Gamma in Water, 8-Nov-1996
Cesium-137
Data sorted by Laboratory Average
Average
Tag
Lab
Average
Tag
Lab
Average
Tag
Lab
19.00

WK
20.00

JS
21.33

SN
19.00

S
20.00

GQ
21.33

RX
19.00

RU
20.00

FE
21.33

KL
19.00

LT
20.00

EL
21.33

JM
19.00

EA
20.00

EB
21.33

CS
19.33

UX
20.00

AZ
21.33

BB
19.33

UV
20.33

VO
21.33

AL
19.33

sx
20.33

sv
21.33

AK
19.33

IU
20.33

SR
21.67

VE
19.33

HX
20.33

QZ
21.67

VA
19.33

DT
20.33

QT
21.67

OM
19.33

AW
20.33

PM
21.67

K
19.33

AE
20.33

JG
21.67

HI
19.67

WR
20.33

FZ
22.00

VS
19.67

W
20.33

DH
22.00

SF
19.67

SC
20.33

AU
22.00

O
19.67

LR
20.33

AH
22.00

KX
19.67

GI
20.67

WV
22.33

XA
19.67

E
20.67

UP
22.33

T
19.67

DE
20.67

SI
22.33

SS
19.67

DD
20.67

RO
22.33

QM
19.67

D
20.67

R
22.33

CX
19.67

CA
20.67

N
22.33

BH
19.67

C
20.67

KH
22.67

TS
19.67

BO
20.67

JE
22.67

SM
19.67

BL
20.67

CJ
23.00

VM
19.67

BC
20.67

CE
23.00

MV
19.67

AJ
20.67

BK
23.00

DR
19.67

AI
20.67

AF
23.33

WI
20.00

VI
21.00

WS
23.33

PV
20.00

VC
21.00

WD
23.67

PU
20.00

UE
21.00

RR
23.67

HP
20.00

U
21.00

PW
24.67

TC
20.00

SZ
21.00

LF
25.00

PE
20.00

SD
21.00

I
26.00

WX
20.00

PB
21.00

HK
26.33

QX
20.00

OB
21.00

FL
27.67

LE
20.00

MX
21.00

CC
32.33
X
JY
20.00

M
21.33

X
34.33
X
TO
20.00

L
21.33

VH
39.00
166.67
X
X
TR
OA
• s No data submitted TAG SYMBOLS IT = Above control limit
0 s Insufficient data	x = Determined to be an outlier	li = Below control limit
-------
CRD-LV Performance Evaluation: Gamma in Water, 8-Nov-1996
30/37
Cesium-137
% responding labs
Frequency distribution

i: I::::::::::::::::::::::

i ^
i
\
1 i
i
i
. i
i
i
i
i
t
i
• i -
i
i i
, i
; i-
' ¦
¦ ¦
Normalized deviation of the mean from the known value
% responding labs	Frequency distribution
20-
10-
o
-I—
-6
-¥—--

-4	-2	0	+2	44
Normalized deviation of the mean from the grand average
-------
CRD-LV Performance Evaluation: Gamma in Water, 8-Nov-1996
31/37
Barium-133	Statistical Summary	169 Participants
The known value of this nuclide is 64.0 pCi/1 with an expected precision of 6.0; the control limits
are 53.6 to 74.4; the warning regions are 53.6 to 57.1 and 70.9 to 74.4
26(15.4 %) Failed to respond •»„
7(4.1 %) Outliers '
1 (0.6 %) Out of control
but not an outlier
Statistic
,121(71.6 %) Within all limits
Respondents
14(8.3 %) In warning zone
but within control
Non-outliers
Mean
Std. Dev.
Variance
% Coef. of Var.
% deviation of mean from known value
Norm. dev. of mean from known value
Median
% deviation of median from known value
Norm. dev. of median from known value
67.99
59.44
3532.84
87.42
6.24
0.07
61.00
-4.69
-0.05
Grand Avg 61.39
3.70
13.71
6.03
-4.07
-0.70
61.00
-4.69
-0.81
8(5.6 %) More than 3 norm. S.D.
14(9.8 %) Between 2 and 3 norm. S.D
68(47.6 %) Within 1 norm. S.D.
of known value
53(37.1 %) Between 1 and 2 norm. S.D.
-------
ft =
32/37
CRD-LV Performance Evaluation: Gamma in Water,
8-Nov-1996


Barium-133







¦v
Lab
Res. 1
Res. 2
Res. 3
Exper.
Rng anal

Normalized deviation

Sigma
(R + SR)
Average
(grand-avg)
(known) Tag
A
57.0
57.0
60.0
1.73
0.295
58.00
-0.98
-1.73

AE
64.0
65.0
63.0
1.00
0.197
64.00
0.75
0.00

AF
63.0
59.0
61.0
2.00
0.394
61.00
-0.11
-0.87

AH
61.0
63.0
61.0
1.15
0.197
61.67
0.08
-0.67

AI
59.0
58.0
57.0
1.00
0.197
58.00
-0.98
-1.73

AJ
63.0
63.0
62.0
0.58
0.098
62.67
0.37
-0.38

AK
65.0
65.0
67.0
1.15
0.197
65.67
1.23
0.48

AL
69.0
65.0
68.0
2.08
0.394
67.33
1.71
0.96

AP







•
AU
56.0
57.0
62.0
3.21
0.591
58.33
-0.88
-1.64

AW
59.0
58.0
60.0
1.00
0.197
59.00
-0.69
-1.44

AY
58.0
60.0
58.0
1.15
0.197
58.67
-0.79
-1.54

AZ
65.0
60.0
62.0
2.52
0.492
62.33
0.27
-0.48

BA
63.0
64.0
61.0
1.53
0.295
62.67
0.37
-0.38

BB
56.0
53.0
62.0
4.58
0.886
57.00
-1.27
-2.02

BC
66.0
64.0
65.0
1.00
0.197
65.00
1.04
0.29

BG








• '
BH
60.0
62.0
60.0
1.15
0.197
60.67
-0.21
-0.96

BK
56.0
56.0
59.0
1.73
0.295
57.00
-1.27
-2.02

BL
65.0
69.0
63.0
3.06
0.591
65.67
1.23
0.48

BM
63.0
65.0
65.0
1.15
0.197
64.33
0.85
0.10

BN








•
BO
61.0
56.0
62.0
3.21
0.591
59.67
-0.50
-1.25

BW








•
C
62.0
62.0
61.0
0.58
0.098
61.67
0.08
-0.67

CA
58.0
60.0
63.0
2.52
0.492
60.33
-0.31
-1.06

CC
620.0
623.0
616*0
3.51
0.689
619.67
161.16
160.41
X
CE
59.0
62.0
63.0
2.08
0.394
61.33
-0.02
-0.77

CJ
59.0
53.0
58.0
3.21
0.591
56.67
-1.36
-2.12

CM








• .
CO








•
cs
65.0
63.0
62.0
1.53
0.295
63.33
0.56
-0.19

cx
55.0
62.0
62.0
4.04
0.689
59.67
-0.50
-1.25

D
58.0
58.0
58.0
0.00
0.000
58.00
-0.98
-1.73

DD
58.0
57.0
61.0
2.08
0.394
58.67
-0.79
-1.54

DE
64.0
65.0
65.0
0.58
0.098
64.67
0.94
0.19

DH
57.0
58.0
57.0
0.58
0.098
57.33
-1.17
-1.92

DO
70.0
71.0
61.0
5.51
0.984
67.33
1.71
0.96

DR
62.0
60.0
64.0
2.00
0.394
62.00
0.17
-0.58

DT
62.0
64.0
69.0
3.61
0.689
65.00
1.04
0.29

DZ








•
E
61.0
58.0
59.0
1.53
0.295
59.33
-0.60
-1.35

EA
61.0
60.0
60.0
0.58
0.098
60.33
-0.31
-1.06

EB
58.0
58.0
58.0
0.00
0.000
58.00
-0.98
-1.73

EL
61.0
58.0
63.0
2.52
0.492
60.67
-0.21
-0.96

• =
No data submitted

TAG SYMBOLS

= Above control limit
l 0 3
^	
Insufficient data
x =
Determined to be an outlier
li s Below control limit
				V
-------
r
CRD-LV Performance Evaluation: Gamma in Water, 8-Nov-1996
33/37
1
Barium-133
Lab Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known) Tatr
EW







- •
EX
53.0
55.0
56.0
1.53
0.295
54.67
-1.94
-2.69
FE
63.0
62.0
61.0
1.00
0.197
62.00
0.17
-0.58
FJ
61.0
63.0
57.0
3.06
0.591
60.33
-0.31
-1.06
FL
65.0
64.0
66.0
1.00
0.197
65.00
1.04
0.29
FZ
64.0
64.0
58.0
3.46
0.591
62.00
0.17
-0.58
GI
64.0
66.0
61.0
2.52
0.492
63.67
0.66
-0.10
GL
56.0
61.0
63.0
3.61
0.689
60.00
-0.40
-1.15
GQ
62.0
62.0
62.0
0.00
0.000
62.00
0.17
-0.58
HI
63.0
63.0
63.0
0.00
0.000
63.00
0.46
-0.29
HK
60.0
61.0
61.0
0.58
0.098
60.67
-0.21
¦0.96
HL
39.0
36.0
36.0
2.08
0.394
36.67
-f.14
7.89; x
HP
65.0
59.0
60.0
3.21
0.591
61.33
-0.02
-0.77
HX
60.0
59.0
57.0
1.53
0.295
58.67
-0.79
-1.54
I
60.0
61.0
62.0
1.00
0.197
61.00
-0.11
-0.87
iu
~J'V
65.0
63.0
62.0
1.53
0.295
63.33
0.56
-0.19
JE
64.0
62.0
64.0
1.15
0.197
63.33
0.56
-0.19
JG
51.0
53.0
55.0
2.00
0.394
53.00
-2.42
-3.18 Jl
JM
57.0
61.0
62.0
2.65
0.492
60.00
-0.40
-1.15
JS
60.0
58.0
63.0
2.52
0.492
60.33
-0.31
-1.06
JY
68.0
71.0
71.0
1.73
0.295
70.00
2.48
1.73
K
60.0
60.0
61.0
0.58
0.098
60.33
-0.31
-1.06
KH
64.0
64.0
62.0
1.15
0.197
63.33
0.56
-0.19
KL
61.0
63.0
64.0
1.53
0.295
62.67
0.37
-0.38
KX
61.0
63.0
61.0
1.15
0.197
61.67
0.08
-0.67
L
60.0
61.0
59.0
1.00
0.197
60.00
-0.40
-1.15
LE
68.0
73.0
78.0
5.00
0.984
73.00
3.35
2.60
LF
66.0
66.0
66.0
0.00
0.000
66.00
1.33
0.58
LR
58.0
59.0
60.0
1.00
0.197
59.00
-0.69
-1.44
LT
55.0
57.0
68.0
7.00
1.533
60.00
-0.40
-1.15
M
56.0
59.0
62.0
3.00
0.591
59.00
-0.69
-1.44
MP
57.0
57.0
56.0
0.58
0.098
56.67
-1.36
-2.12
MV
61.0
59.0
62.0
1.53
0.295
60.67
-0.21
-0.96
MX
65.0
65.0
64.0
0.58
0.098
64.67
0.94
0.19
N
66.0
66.0
66.0
0.00
0.000
66.00
1.33
0.58
NH







V
NJ
57.0
62.0
57.0
2.89
0.492
58.67
-0.79
-1.54
NK
57.0
55.0
61.0
3.06
0.591
57.67
-1.08
-1.83
NO







••V
O
66.0
68.0
70.0
2.00
0.394
68.00
1.91
1.15
OA
490.0
510.0
500.0
lOvOO
2.846
500.00
126;6li
VZ5 M 'x~'
OB







• -<
OK








OM
63.0
61.0
59.0
2.00
0.394
61.00
-0.11
-0.87
• =
1 0 =
No data submitted
Insufficient data

TAG SYMBOLS
-Determined to be an outlier
IT = Above control limit
s Below control limit
-------
34/37
\
CRD-LV Performance Evaluation
: Gamma in Water,
8-Nov-1996


Barium-133








Lab
Res. 1
Res. 2

Exper.
Rng anal

Normalized deviation

Res. 3
Sigma
(R + SR)
Average
(grand-avg)
(known) Tae
OT








•
P
65.0
73.0
61.0
6.11
1.345
66.33
1.43
0.67

PB
62.0
64.0
63.0
1.00
0.197
63.00
0.46
-0.29

PE
65.0
65.0
64.0
0.58
0.098
64.67
0.94
0.19

PM
54.0
61.0
59.0
3.61
0.689
58.00
-0.98
-1.73

PQ







•
PU









PV
61.0
67.0
61.0
3.46
0.591
63.00
0.46
-0.29

PW
59.0
59.0
60.0
0.58
0.098
59.33
-0.60
-1.35

PX
65.0
65.0
63.0
1.15
0.197
64.33
0.85
0.10

Q
62.0
67.0
65.0
2.52
0.492
64.67
0.94
0.19

QM
87.0
88.0,
.77.0
6.08
1.168
84.00
6i63
5;77
X
QP
59.0
56.0
51.0
4.04
0.788
55.33
-1.75
-2.50

QT
62.0
62.0
62.0
0.00
0.000
62.00
0.17
-0.58

QU
44.0
44;0
45.0
0.58
0.098
44.33
-4.93
-5.68
X
QW
46.0
43.0
44.0
1.53
0.296
44,33
-4.93
-5.68
X
ox
69.0
70.0
70.0
0.58
0.098
69.67
2.39
1.64

QZ
60.0
60.0
63.0
1.73
0.295
61.00
-0.11
-0.87

R
59.0
61.0
60.0
1.00
0.197
60.00
-0.40
-1.15

RF
57.0
58.0
57.0
0.58
0.098
57.33
-1.17
-1.92

RH








•
RK








• ..
RO
55.0
52.0
54.0
1.53
0.295
53.67
-2.23
-2.98

RR
55.0
66.0
61.0
5.51
1.158
60.67
-0.21
-0.96

RU
60.0
62.0
62.0
1.15
0.197
61.33
-0.02
-0.77

RX
63.0
64.0
68.0
2.65
0.492
65.00
1.04
0.29

RZ








•
S
58.0
59.0
60.0
1.00
0.197
59.00
-0.69
-1.44

sc
56.0
52.0
58.0
3.06
0.591
55.33
-1.75
-2.50

SD
62.0
66.0
56.0
5.03
0.984
61.33
-0.02
-0.77

SF
64.0
64.0
67.0
1.73
0.295
65.00
1.04
0.29

SI
61.0
62.0
55.0
3.79
0.689
59.33
-0.60
-1.35

SM
68.0
63.0
63.0
2.89
0.492
64.67
0.94
0.19

SN
60.0
55.0
57.0
2.52
0.492
57.33
-1.17
-1.92

SR
48.0
60.0
64.0
8.33
2.095
57.33
-1.17
-1.92

ss
58.0
59.0
59.0
0.58
0.098
58.67
-0.79
-1.54

sv
65.0
68.0
64.0
2.08
0.394
65.67
1.23
0.48

sx
58.0
66.0
55.0
5.69
1.158
59.67
-0.50
-1.25

sz
62.0
61.0
52.0
5.51
0.984
58.33
-0.88
-1.64

T
65.0
63.0
64.0
1.00
0.197
64.00
0.75
0.00

TC
58.0
59.0
61.0
1.53
0.295
59.33
-0.60
-1.35

TD
58.0
53.0
55.0
2.52
0.492
55.33
-1.75
-2.50

TH








•'
TL








6 ¦
TO
62.0
52.0
53.0
5.51
0.984
55.67
-1.65
-2.41

• =
No data submitted

TAG SYMBOLS

ft = Above control limit
SI
in
Insufficient data
3
r Determined to be an outlier
11 = Below control limit
	jj
-------
CRD-LV Performance Evaluation: Gamma in Water, 8-Nov-1996
35/37
Barium-133
Lab Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known)
TQ
61.0
63.0
65.0
2.00
0.394
63.00
0.46
-0.29
TR
58.0
61.0
60.0
1.53
0.295
59.67
-0.50
-1.25
TS
79.0
60.0
63.0
10.21
2.658
67.33
1.71
0.96
U
63.0
63.0
56.0
4.04
0.689
60.67
-0.21
-0.96
UE
61.0
62.0
61.0
0.58
0.098
61.33
-0.02
-0.77
UN







UP
64.0
64.0
65.0
0.58
0.098
64.33
0.85
0.10
UE







TJT








UV
56.0
53.0
62.0
4.58
0.886
57.00
-1.27
-2.02
UX
56.0
56.0
62.0
3.46
0.591
58.00
-0.98
-1.73
VA
71.0
68.0
66.0
2.52
0.492
68.33
2.00
1.25
VC
64.0
62.0
59.0
2.52
0.492
61.67
0.08
-0.67
VE
70.0
68.0
69.0
1.00
0.197
69.00
2.20
1.44
VH
63.0
57.0
65.0
4.16
0.788
61.67
0.08
-0.67
VI
57.0
56.0
61.0
2.65
0.492
58.00
-0.98
-1.73
VM
62.0
58.0
60.0
2.00
0.394
60.00
-0.40
-1.15
VO
66.0
68.0
62.0
3.06
0.591
65.33
1.14
0.38
vs
60.0
59.0
60.0
0.58
0.098
59.67
-0.50
-1.25
w
59.0
64.0
64.0
2.89
0.492
62.33
0.27
-0.48
WD
61.0
64.0
60.0
2.08
0.394
61.67
0.08
-0.67
WI
62.0
81.0
60.0
11.59
3.033
67.67
1.81
1.06
WJ
62.0
63.0
64.0
1.00
0.197
63.00
0.46
-0.29
WK
64.0
62.0
63.0
1.00
0.197
63.00
0.46
-0.29
WO
56.0
54.0
52.0
2.00
0.394
54.00
-2.13
-2.89
WR
60.0
60.0
61.0
0.58
0.098
60.33
-0.31
-1.06
WS
71.0
66.0
69.0
2.52
0.492
68.67
2.10
1.35
WV
62.0
61.0
66.0
2.65
0.492
63.00
0.46
-0.29
WW
58.0
57.0
48.0
5.51
0.984
54.33
-2.04
-2.79
WX
44.0
46.0
44.0
0.58
0.09a
44.33
-4.93
-5;68
WY








X
58.0
58.0
56.0
1.15
0.197
57.33
-1.17
-1.92
XA
69.0
67.0
69.0
1.15
0.197
68.33
2.00
1.25
XB








Data sorted by Laboratory Average
Average
Tag
Lab
Average Tag
Lab
Average
Tag Lab
36.67
X
HL
54.67
EX
57.00
BK
44.33
X
WX
55.33
TD
57.00
BB
44.33
X
QW
55.33
SC
57.33
X
44.33
X
QU
55.33
QP
57.33
SR
53.00

JG
55.67
TO
57.33
SN
53.67

RO
56.67
MP
57.33
RF
54.00

WO
56.67
CJ
57.33
DH
54.33

WW
57.00
UV
57.67
NK
• = No data submitted

TAG SYMBOLS

1t
= Above control limit
0 s Insufficient data
1c?
x a Determined to be an outlier
U
= Below control limit
-------
36 / 37	CRD-LV Performance Evaluation: Gamma in Water, 8-Nov-1996
"	— ¦	— i	i	,	,		
Barium-133
Data sorted by Laboratory Average
Average
Tag
Lab
Average
Tag
Lab
Average
Tag
Lab
58.00

VI
60.67

U
63.33

IU
58.00

ux
60.67

RR
63.33

cs
58.00

PM
60.67

MV
63.67

GI
58.00

EB
60.67

HK
64.00

T
58.00

D
60.67

EL
64.00

AE
58.00

AI
60.67

BH
64.33

UP
58.00

A
61.00

QZ
64.33

PX
58.33

sz
61.00

OM
64.33

BM
58.33

AU
61.00

I
64.67

SM
58.67

ss
61.00

AF
64.67

Q
58.67

NJ
61.33

UE
64.67

PE
58.67

HX
61.33

SD
64.67

MX
58.67

DD
61.33

RU
64.67

DE
58.67

AY
61.33

HP
65.00

SF
59.00

S
61.33

CE
65.00

RX
59.00

M
61.67

WD
65.00

FL
59.00

LR
61.67

VH
65.00

DT
59.00

AW
61.67

VC
65.00

BC
59.33

TC
61.67

KX
65.33

VO
59.33

SI
61.67

C
65.67

sv
59.33

PW
61.67

AH
65.67

BL
59.33

E
62.00

QT
65.67

AK
59.67

vs
62.00

GQ
66.00

N
59.67

TR
62.00

FZ
66.00

LF
59.67

sx
62.00

FE
66.33

P
59.67

cx
62.00-

DR
67.33

TS
59.67

BO
62.33

W
67.33

DO
60.00

VM
62.33

AZ
67.33

AL
60.00

R
62.67

KL
67.67

WI
60.00

LT
62.67

BA
68.00

O
60.00

L
62.67

AJ
68.33

XA
60.00

JM
63.00

WV
68.33

VA
60.00

GL
63.00

WK
68.67

WS
60.33

WR
63.00

WJ
69.00

VE
60.33

K
63.00

TQ
69.67

QX
60.33

JS
63.00

PV
70.00

JY
60.33

FJ
63.00

PB
73.00

LE
60.33

EA
63.00

m
84.00
X
QM
60.33

CA
63.33

KH
500.00
X
OA



63.33

JE
619.67
X
CC
• = No data submitted TAG SYMBOLS	ft = Above control limit
0 = Insufficient data	 x = Determined to be an outlier	s Below control limit
-------
CRD-LV Performance Evaluation: Gamma in Water, 8-Nov-1996	37 / 37
Barium-133
% responding labs	Frequency distribution
lOf
-¦ mllllM.I,
,	M—,			,	,	^
-6	-4	-2	0	+2+4+6
Normalized deviation of the mean from the known value
% responding labs	Frequency distribution
	,	,	rSi
0+2
-6	-4	-2	0+2+4
Normalized deviation of the mean from the grand average
-------
United States	Office of Research and	EPA/600/R-97/021
Environmental Protection	Development	February 1997
Agency	Washington, DC 20460
Uranium-Radium in
Water Performance
Evaluation Study
A Statistical Evaluation of the
December 6,1996 Data
OO2RSL07 COV
-------
Uranium-Radium in Water
Performance Evaluation Study
December 6, 1996
Environmental Protection Agency
National Exposure Research Laboratory
Characterization Research Division
Las Vegas, Nevada
-------
UNITED STATES ENVIRONMENTAL PROTECTION AGENCY
OFFICE OF RESEARCH AND DEVELOPMENT
NATIONAL EXPOSURE RESEARCH LABORATORY
CHARACTERIZATION RESEARCH DIVISION-LAS VEGAS
P.O. BOX 93478
LAS VEGAS, NEVADA 89193-3478
(702/798-2100)
Dear Participant,
Enclosed are the results of the Analytical Sciences Branch (CRD-LV)
Performance Evaluation Study for Uranium-Radium in Water; December 6, 1996.
The known value for each analysis was determined by gravimetric methods,
checked by chemical analyses performed by CRD-LV's Radiochemistry Laboratory,
and compared to the participating laboratories' grand average.
The expected precision, determined by the known value, was taken from
Table 3. Laboratory Precision: One Standard Deviation Values and Control Limits
for Various Analyses", which is based on data accumulated over the years by the
Performance Evaluation Program, and can be found in the Environmental Radioactivity
Performance Evaluation Studies Program and Radioactive Standards Distribution
Program information brochure.
Please take a few minutes to review this report and the analytical data your
laboratory submitted to us. If there are any apparent discrepancies, please notify us
immediately.
We encourage you to make use of the computer-automated data-entry system
that has been in place for some time now. As the number of participants increases,
and it becomes unrealistic for us to receive results by mail or FAX, the computer
system will be our only avenue for accepting data.
If you have any questions or comments, please send a message via the data-entry
system or contact Stephen Pia at 702/798-2102 or Patricia Honsa at 702/798-2141.
Sincerely, /I
Stephen Pia
Team Leader
RADQA Program
Enclosure
-------
NOTICE
This material has been funded wholly by
the U.S. Environmental Protection Agency.
It has been subjected to the Agency's review,
and has been approved for publication as
an EPA document.
-------
CRD-LV Performance Evaluation: Uranium-Radium in Water, fl-Dec-1996
1/20
The following pages consist of separate sections for each of the nuclides in this study with four
parts per section. After the first, each part is separated from the next hv a new page or f thick
horizontal bar. The first page of each section is a statistical summary for the nuclide starts
with a statement of the known value, the control limits, and the warning limits.
The warding limits are placed at two normalized standard deviations above and below the
known value and the control limits are three normalized standard deviations above and below
the known value. If you keep control charts, these values will be useful for anticipating problems
with the accuracy of your analytical methods.
The coin shaped pie chart at the top of the summary page shows the fate of all the samples
sent out in number and percentage terms. The pie chart starts at the top and rotates clockwise.
The first sector represents those participants who submitted analytical results within both the
warning and control limits. The next sector represents those who are in the warning region but
not out of control. The third sector represents those who are out of control, but have passed
the outlier test. The fourth sector represents those who have failed the outlier test The last
sector represents those participants who have failed to respond properly. This is the case if no
analytical results were returned, or less than three determinations were reported, or if the results
were received too late. The reeding on the edge of the coin is spaced at one percent intervals, and
the sector shading becomes darker as the data reliability decreases. Sectors with zero width are
not shown.
The table in the center shows a number of statistical quantities calculated from the submitted
data based on the mean and median values in relation to the known value, both before and after
outlier removal. The lower pie chart uses the same construction as the upper chart and shows
the distribution of properly submitted data in terms of deviation from the known value divided
into sectors representing one, two, three, and greater than three normalized standard deviations.
The second part is an alphabetical listing, in lab-code order, of submitted data and several
calculated quantities. An entry that is shaded has been rejected because of one of the reasons
listed above or failure of the outlier test. The fifth and sixth columns are a measure of laboratory
precision. The Range analysis is a normalized value that you may use to keep precision control
charts. The eighth and ninth columns are the differences from the mean of all non-outliers and
from the known value, respectively. If this value is between 2.0 and 3.0, your analytical process
precision is in the warning zone; if it exceeds 3.0 it is out of control. A tag symbol may appear in
the last column. Each page with tags has a symbol definition summary at the bottom. If there ia
no tag symbol, the data is within the control limits, but it may be in the warning zone.
The third part is a three-column listing of result average, tag symbol, and lab-code in average
order excluding those labs not responding properly. In this order, all outliers and out-of-control
results appear at the top or bottom of the list.
The last part is two bar chart displays showing frequency distributions of responding
participants. The first chart places the known value at the center and a bar at each 0.2 unit of
expected precision. The second chart places the mean of the reported measurements at the center
and a bar at each 0.2 unit of standard deviation. In both cases, a bar includes those results within
0.1 unit up to the mmimum of six. Any results more than six wits from the center value are
shown cumulatively by a shaded bar one past the sixth unit. If the central tendency of the known
value distribution falls away from the center, an error in accuracy is indicated. If the distribution
is broad, poor precision is indicated. The mean value distribution is similar but uses the average
and standard deviation of reported results as its basis.
-------
2/20 CRD-LV Performance Evaluation: Uranium-Radium in Water, 6-Dec-1996
The Range Analysis(R + SR) is calculated from the range, mean range and standard error of
the range values. The range is the difference between the maximum and minimum results for the
laboratory. The mean range is calculated by multiplying the expected precision by 1.693(for three
results). The standard error of the range is calculated by multiplying the mean range by 2.575(for
three results), subtracting the mean range from this product, and dividing the result by 3. If the
range is greater than the mean range, then the range analysis is calculated by subtracting the
mean range from the range, dividing the result by the standard error of the range and adding 1.
If the mean range is greater than or equal to the range, then the range analysis is calculated by
dividing the range by the mean range.
The normalized deviation of the mean from the grand average is calculated from the deviation
of the mean from the grand average and the standard error of the mean values. The deviation of
the mean from the grand average is calculated by subtracting the grand average from the
average of the laboratory's three results. The standard error of the mean is calculated by
dividing the expected precision by the square root of 3(the number of results). The normalized
deviation of the mean from the grand average is calculated by dividing the deviation of the mean
from the grand average by the standard error of the mean.
The normalized deviation of the mean from the known value is calculated from the deviation of
the mean from the known value and the standard error of the mean values. The deviation of the
mean from the known value is calculated by subtracting the known value from the average of the
laboratory's three results. The standard error of the mean is calculated by dividing the expected
precision by the square root of 3(the number of results). The normalized deviation of the mean
from the known value is calculated by dividing the deviation of the mean from the known value by
the standard error of the mean.
A complete explanation of the statistical calculations involved in the report may be found in
the Environmental Radioactivity Performance Evaluation Studies Program information brochure
[Draft Revision of EPA-600/4-81-004], available from Patricia Honsa, CRD-LV, 702/798-2141.
-------
CRD-LV Performance Evaluation: Uranium-Radium in Water, S-Dec-1996 3 120
Uranium (Natural)	Statistical Summary	153 Participants
The known value of this nuclide is 8.0 pCi/1 with an expected precision of 3.0; the control limits
are 0.0 to 10.2; the warning regions are 0.0 to 1.5 and 8.5 to 10.2
Statistic		Respondents	 Non-out Iiera
Mean
5.63
Grand Avg 5.14
Std. Dev.
2.66
0.94
Variance
7.0?
0.88
% Coef. of Var.
47.23
18.27
% deviation of mean from known value
12.56
2.74
Norm. dev. of mean from known value
0.24
0.15
Median
5.07
5.00
% deviation of median from known value
1.33
0.00
Norm. dev. of median from known value
0.03
0.00
-------
/. =
4/20
CRD-LV Performance Evaluation: Uranium-Radium in Water, 6-Dec-1996
	=N
Uranium (Natural)








Lab
Res. 1 Res. 2
Res. 3
Exper.
Rng anal

Normalized deviation

Sigma
(R + SR)
Average
(grand-avg)
(known) Tag
A
4.9
4.8
4.9
0.06
0.020
4.87
-0.16
-0.08

AE
5.3
5.4
5.4
0.06
0.020
5.37
0.13
0.21

AF
6.0
5.2
6.2
0.53
0.197
5.80
0.38
0.46

AH
4.7
4.4
4.6
0.15
0.059
4.57
-0.33
-0.25










AK
5.4
5.1
5.3
0.15
0.059
5.27
0.07
0.15
AL
5.2
4.2
4.5
0.51
0.197
4.63
-0.29
-0.21

AP
6.2
5.0
5.5
0.60
0.236
5.57
0.25
0.33

AR
4.6
4.5
4.5
0.06
0.020
4.53
-0.35
-0.27

AU?







V ' >
AW
4.4
4.2
5.5
0.70
0.256
4.70
-0.25
-0.17

AZ
4.8
5.1
5.0
0.15
0.059
4.97
-0.10
-0.02

BA
4.5
4.4
4.6
0.10
0.039
4.50
-0.37
-0.29

BC
4.9
4.9
4.8
0.06
0.020
4.87
-0.16
-0.08

BG
5.1
5.2
5.5
0.21
0.079
5.27
0.07
0.15

BG
5.3
5.2
5.4
0.10
0.039
5.30
0.09
0.17

BG
3.8
3.7
3.7
0.06
0.020
3.73
-0.81
-0.73

BH
5.2
5.4
4.7
0.36
0.138
5.10
-0.02
0.06

BK
4.6
4.6
4.5
0.06
0.020
4.57
-0.33
-0.25

BM
5.3
5.4
5.6
0.15
0.059
5.43
0.17
0.25

BN
6.6
5.4
4.5
1.05
0.413
5.50
0.21
0.29

BO
4.2
4.6
5.4
0.61
0.236
4.73
-0.23
-0.15

C
4.0
4.0
4.0
0.00
0.000
4.00
-0.66
-0.58

CA
5.1
5.3
5.3
0.12
0.039
5.23
0.06
0.13

CC*
10.0:
id,o;
ii.o
0.58
0.197
10i33
3,00
3.08
K-V.
CE
5.6
5.2
5.6
0.23
0.079
5.47
0.19
0.27

CG
8.7
9.7
6.0
1.91
0.728
8.13
1.73
1.81

CJ
5.4
5.1
4.9
0.25
0.098
5.13
0.00
0.08

CM








4 <--<¦
cs
4.5
4.6
4.6
0.06
0.020
4.57
-0.33
-0.25

cx
5.7
5.8
5.9
0.10
0.039
5.80
0.38
0.46

D
5.0
4.9
5.1
0.10
0.039
5.00
-0.08
0.00

DB
3.9
3.9
4.4
0.29
0.098
4.07
-0.62
-0.54

DE
8.1
8.2
8.3
0.10
0.039
8.20
1.77
1.85

DI
5.1
4.9
4.8
0.15
0.059
4.93
-0.12
-0.04

DO
4.1
4.5
4.8
0.35
0.138
4.47
-0.39
-0.31

DR









DT
5.5
5.4
4.8
0.38
0.138
5.23
0.06
0.13

DZ
5.5
5.6
6.1
0.32
0.118
5.73
0.34
0.42

E
4.9
4.9
5.0
0.06
0.020
4.93
-0.12
-0.04

EB
4.9
5.1
5.2
0.15
0.059
5.07
-0.04
0.04

FT.
4.7
4.6
4.8
0.10
0.039
4.70
-0.25
-0.17

EO









EP









ER
10.3
10.1
9.4
0.47
0.177
9.93
2.77
2.85

• h No data submitted

TAG SYMBOLS

It s Above control limit
[03 Insufficient data
X 5
Determined to be an outlier
11 s Below control limit
-------
fC
CRD-LV Performance Evaluation: Uranium-Radium in Water, 6-Dec-1996 5/20
Uranium (Natural)






¦v
» •
Hea. 1
Res. 2
Res, 3
Exper.
Rng anal

Normalized deviation

Lab
Sigma
(R + SR)
Average
{grand-argi
(known) Tag
FB*








•: 9
'-Fj-t:









FN
5.3
5.0
5.6
0.30
0.118
5.30
0.09
0.17

FZ








GN
4.0
4.1
3.9
0.10
0.039
4.00
¦0.66
-0.58

G<*
5.8
5.8
5.2
0.35
0.118
5.60
0.27
0.35

HK
5.4
5.6
5.1
0.25
0.098
5.37
0.13
0.21

HL
5.5
6.1
5.9
0.31
0.118
5.83
0.40
0.48

HP
5.5
5.1
5.1
0.23
0.079
5.23
0.06
0.13

I
6.1
6.2
5.5
0.38
0.138
5.93
0.46
0.54

ri*

A-r-. "i*. .. "*
14.1
0.26
&098
14.40
5.35
5.43:

V "•<
JE
4.9
4.5
4.8
0.21
0.079
4.73
-0.23
¦0.15
ft *-»
«JG







i.
•*
JK
5.2
4.7
5.0
0.25
0.098
4.97
-0.10
-0.02

JN
6.1
4.4
7.2
1.41
0.551
5.90
0.44
0.52

JP
4.6
4.7
4.4
0.15
0.059
4.57
-0 33
-0.25

JS
53
5.3
5.3
0.00
0.000
5.30
009
0.17

JX








Tg|
JY
5.4
4.7
4.2
0.60
0.236
4.77
-0.21
-0.13

K
5.6
4.2
5.0
0.70
0.276
4.93
-0.12
-0.04

KH
4.6
4.8
4.9
0.06
0.020
4.83
-0.18
-0.L0











* J3*»)6r*
OiS^







siM
L
5.0
5.0
5.2
0.12
0.039
5.07
-0.04
0.04

LF
5.1
4.9
4.9
0.12
0.039
4.97
-0.10
-0.02

LHI









LT
3.9
3.9
4.4
0.29
0.098
4.07
-0.62
-0.54

LZ
5.0
5.0
5.0
0.00
0.000
5.00
-0.08
0.00

M'~'*









MX
>37.9
19^
20.6
4.43
2.095
22.80
10.20
10.28
.'k "
N .









NA
8.0
7.0
7.0
0.58
0.197
7.33
1.27
1.35

NH
4.3
4.2
4.2
0.06
0.020
4.23
-0.52
-0.44

NJ
5.2
5.4
5.0
0.20
0.079
5.20
0.04
0.12

NK
4.9
4.7
4.7
0.12
0.039
4.77
-0.21
-0.13

NO
5.1
6.3
5.5
0.20
0.079
5.30
0 09
0.17

NT
4.0
4.1
4.3
0.35
0.138
4.33
-0 46
-0.38

¦or"









OB
5.3
5.3
5.0
0.17
0.059
5.20
0.04
0.12

OF:









OM.








V-
OS
52
4.6
5.6
0.50
0.197
5.13
0.00
0.08

OX









OY








•
• s
No data submitted

TAG SYMBOLS

ft a Above control limit
1 0 3
^	
Insufficient data
x =
Determined to be an outlier
JJ a Below control limit
-------
6/20
CRD-LV Performance Evaluation: Uranium-Radium in Water, 6-Dec-1996

Uranium (Natural)
Lab Res. 1 Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-nvg) (known) Tas
P
6.7
4.9
5.8
0.90
0.354
5.80
0.38
0.46

PB
4.9
5.2
4.7
0.25
0.098
4.93
-0.12
-0.04

PG
5.6
4.7
4.6
0.55
0.197
4.97
-0.10
-0.02

PQ
5.1
5.1
5.2
0.06
0.020
5.13
0.00
0.08

PV
4.5
4.7
5.1
0.31
0.118
4.77
-0.21
-0.13

PW
3.1
2.8
3.5
0.35
0.138
3.13
-1.16
-1.08

PX
5.4
5.2
5.0
0.20
0.079
5.20
0.04
0.12

Q
4.7
4.1
4.5
0.31
0.118
4.43
-0.41
-0.33

QH
14.6
14.2
14.7
0.26
0.098
14.60
6.41
5.48
X
QQ
5.5
5.0
5.8
0.40
0.158
5.43
0.17
0.25

QU
4.2
5.9
4.9
0.85
0.335
5.00
-0.08
0.00

QX
1.8
2.3
3.3
0.76
0.295
2.47
-1.54
-1.46

QZ
R
5.0
4.8
4.7
0.15
0.059
4.83
-0.18
-0.10

RD
4.6
4.7
4.6
0.06
0.020
4.63
-0.29
-0.21
RF
5.2
5.1
4.8
0.21
0.079
5.03
-0.06
0.02

RG
5.0
4.9
5.0
0.06
0.020
4.97
-0.10
-0.02

RK








•
RP
5.2
4.6
4.8
0.31
0.118
4.87
-0.16
-0.08

RR
5.0
4.5
4.9
0.26
0.098
4.80
-0.19
-0.12

RX
22.0
18:4
20.0
1.80
0.709
20.13
8.66
8.74
X
RZ
4.5
4.3
' 4.7
0.20
0.079
4.50
-0.37
-0.29

S
4.9
4.5
4.6
0.21
0.079
4.67
-0.27
-0.19

sc
5.3
5.9
4.7
0.60
0.236
5.30
0.09
0.17

SD
5.3
5.1
4.8
0.25
0.098
5.07
-0.04
0.04

SF
5.0
4.9
5.0
0.06
0.020
4.97
-0.10
-0.02

SI
4.9
4.8
4.9
0.06
0.020
4.87
-0.16
-0.08

SL
6.3
4.9
5.8
0.71
0.276
5.67
0.31
0.38

SM
7.5
5.7
4.5
1.51
0.591
5.90
0.44
0.52

SO
7.0
7.0
6.5
0.29
0.098
6.83
0.98
1.06

88
5.2
5.1
5.0
0.10
0.039
5.10
-0.02
0.06

SX
4.7 ¦
4.9
4.8
0.10
0.039
4.80
-0.19
-0.12

sz
m
4.6
4.6
4.8
0.12
0.039
4.67
-0.27
-0.19

1
TD
5.5
5.4
5.5
0.06
0.020
5.47
0.19
0.27

TH








•
TL









TN








V
TQ
5.2
5.4
5.3
0.10
0.039
5.30
0.09
0.17

TS








*-
U
5.0
5.0
4.9
0.06
0.020
4.97
-0.10
-0.02

UE
4.5
5.0
5.1
0.32
0.118
4.87
-0.16
-0.08

UN









UP
3.4
4.2
3.6
0.42
0.158
3.73
-0.81
-0.73

UQ







- ¦
• -
• 3
0 H
No data submitted
Insufficient data
X 3
TAG SYMBOLS
Determined to be an outlier
ft a Above control limit
11 s Below control limit
-------
CRD-LV Performance Evaluation: Uranium-Radium in Water, 6-Dec-
1996 7 / 20
Uranium (Natural)










Lab
Res. 1 Res. 2


Exper.
Rug anal


Normalized deviation

Res. 3
Sigma
(R + SR)
Average
(grrmd-avg) (known) Ta^
UZ
WM
4.0
8.8
12.2
4.12
2.170

8.33
1.85
1.92
'A
VH
6.6
6.7

5.8
0.49
0.177

6.37
0.71
0.79

VI
5.3
5.6

5.3
0.17
0.059

5.40
0.15
0.23

W
5.5
5.4

5.5
0.06
0.020

5.47
0.19
0.27

•-tWGr1








A •
WG
5.5
5.2

5.2
0.17
0.059

5.30
0.09
0.17
w
WH
5.2
5.2

5.4
0.12
0.039

5.27
0.07
0.15

WI
4.7
4.6

4.6
0.06
0.020

4.63
-0.29
-0.21

WJ
4.6
4.4

4.4
0.12
0.039

4.47
-0.39
-0.31











\\,V.
WR
4.5
4.4

4.4
0.06
0.020
4.43
-0.41
-0.33

X'WSI










wv










J*. •
'-."WXi..











X
5.5
5.0

4.8
0.36
0.138
5.10
-0.02
0.06

XA
5.1
5.4

6.0
0.46
0.177
5.50
0.21
0.29

•xc;:













Data sorted by Laboratory Average



Average
Tag

Lab
Average
Tag
Lab
Average
Tag
Lab
2.47


QX

4.67

SZ

4.97

RG
3.13


PW

4.67

s

4.97

PG
3.73


UP

4.70

EL

4.97

LF
3.73


BG

4.70

AW

4.97

JK
4.00


GN

4.73

BO

4.97

AZ
4.00


C

4.73

JE

5.00

QU
4.07


LT

4.77

PV

5.00

LZ
4.07


DB

4.77

NK

5.00

D
4.23


NH

4.77

JY

5.03

RF
4.33


NT

4.80

sx

5.07

L
4.43


WR

4.80

RR

5.07

EB
4.43


Q

4.83

QZ

5.07

SD
4.47


WJ

4.83

KH

5.10

X
4.47


DO

4.87

UE

5.10

ss
4.50


RZ

4.87

SI

5.10

BH
4.50


BA

4.87

RP

5.13

PQ
4.53


AR

4.87

BC

5.13

OS
4.57


JP

4.87

A

5.13

CJ
4.57


CS

4.93

PB

5.20

PX
4.57


BK

4.93

K

5.20

OB
4.57


AH

4.93

E

5.20

NJ
4.63


WI

4.93

DI

5.23

HP
4.63


RD

4.97

U

5.23

DT
4.63


AL

4.97

SF

5.23

CA
• a No data submitted


TAG SYMBOLS


ft a Above control limit
1 0 a Insufficient data


X 3
Determined to be an outlier

U a Below control limit
-------
8/20 CRD-LV Performance Evaluation: Uranium-Radium in Water, 6-Dec-1996
Uranium (Natural)
Datfl sorted hy Laboratory Average
Average
Tag
Lab
Average
Tag
Lab
Average
Tag
Lab
5.27

WH
5.43

BM
5.90

SM
5.27

BG
5.47

W
5.90

JN
5.27

AK
5.47

TD
5.93

I
5.30

WG
5.47

CE
6.37

VH
6.30

TQ
5.50

XA
6.83

SO
5.30

SC
5.50

BN
7.33

NA
5.30

NO
5.57

AP
8.13

CG
5.30

JS
5.60

GQ
8.20

DE
5.30

FN
5.67

SL
8.33

UZ
5.30

BG
5.73

DZ
9.93

ER
5.37

HK
5.80

P
10.33
X
CC
5.37

AE
5.80

CX
14.40
X
ID
5.40

VI
5.80

AF
14.50
X
QM
5.43

Q9
5.83

HL
20.13
22.80
X
X
RX
MX
20
10
0
%
30
20
10
0
• 2 No data submitted TAG SYMBOLS ft = Above control limit
0 s Insufficient data	x a Determined to be an outlier	g Below control limit JJ
responding labs		Frequency diatribution
i	i	<	i	i —	.	.
-b	-4	-2	0+2+4
Normalized deviation of the mean from the known value
responding labs	Frequency distribution	
J i	i	i	I	i m 1 .....
-6	-4	-2	0+2+4
Normalized deviation of the mean from the grand average
-------
CRD-LV Performance Evaluation: Uranium-Radium in Water, B-Dec-1996 9/20
Radium-226	Statistical Summary	151 Participants
The known value of this nuclide is 20.1 pCi/l with an expected precision of 3.0; the control limits
are 14.9 to 25.3; the warning regions are 14.9 to 16.6 and 23.6 to 25.3
Statistic			Respondents	Non-outliers
Mean
18.84
Grand Avg 19.25
Std. Dev.
3.68
1.80
Variance
13.51
3.23
% Coef. of Var.
19.51
9.33
% deviation of mean from known value
•6.28
-4.21
Norm. dev. of mean from known value
•0.34
-0.47
Median
19.17
19.33
% deviation of median from known value
-4.64
-3.81
Norm. dev. of median from known value
-0.25
-0.43
-------
10/20 CRD-LV Performance Evaluation: Uranium-Radium in Water, 6-Dec-1996

Radium-228






*\
Lab
Res. 1
Res. 2
Res. 3
Exper.
Rng anal

Normalized deviation
Sijrma
(R * SR)
Average
fgrnnrl-Rvg)
(known) Tag
A
19.4
19.9
19.8
0.26
0.098
19.70
0.26
-0.23
AE
18.3
17.9
17.5
0.40
0.158
17.90
-0.78
-1.27
AF
18.4
18.7
18.8
0.21
0.079
18.63
-0.36
-0.85
AH
15.1
19.4
18.4
2.25
0.847
17.63
-0.94
-1.42
AJ








AK
21.5
19.2
18.8
1.46
0.532
19.83
0.33
-0.15
AL
20.1
18.2
19.9
1.04
0.374
19.40
0.08
-0.40
AP
20.2
20.6
20.7
0.26
0.098
20.50
0.72
0.23
¦Ik&i







•It

mm
lliii
mm
hOP
'0.354'


-943 'x*r
AW
17.9
18.1
18.7
0.42
0.158
18.23
-0.59
-1.08
AZ
20.9
18.0
16.9
2.07
0.788
18.60
-0.38
-0.87
BA
16.5
18.2
14.8
1.70
0.669
16.50
-1.59
-2.08
BG
18.8
20.4
19.1
0.85
0.315
19.43
0.10
-0.38
BG







• .
BH
16.4
17.6
16.1
0.79
0.295
16.70
-1.47
-1.96
BK
19.5
20.1
19.7
0.31
0.118
19.77
0.30
-0.19
BM
18.2
18.2
18.1
0.06
0.020
18.17
-0.63
-1.12
BN
18.1
20.1
19.8
1.08
0.394
19.33
0.05
-0.44
BO
21.1
21.2
20.0
0.67
0.236
20.77
0.87
0.38
C
19.1
18.3
18.2
0.49
0.177
18.53
-0.42
-0.90
CA
20.2
20.2
20.2
0.00
0.000
20.20
0.55
0.06
CC
21.0
19.0
20.0
1.00
0.394
20.00
0.43
-0.06
CE
19.9
20.2
18.7
0.79
0.295
19.60
0.20
-0.29
CG
18.2
17.3
20.3
1.54
0.591
18.60
-0.38
-0.87
CJ
20.0
21.0
20.0
0.5 8
0.197
20.33
0.62
013
CMV







• j'
cs
21.2
21.9
23.1
0.96
0.374
22.07
1.62
1.14
ex








D







.'*¦* .
DB
18.3
18.9
19.4
0.55
0.217
18.87
-0.22
-0.71
DE
20.2
20.3
20.4
0.10
0.039
20.30
0.60
012
DI







«- .
DO








DB








DT
19.4
19.1
19.0
0.21
0.079
19.17
-0.05
-0.54
DZ
21.8
22.0
20.5
0.81
0.295
21.43
1.26
0.77
E
17.4
20.3
18.5
1.46
0.571
18.73
-0.30
-0.79
EB
19.5
20.2
21.0
0.75
0.295
20.23
0.57
0.08
EL
17.8
22.1
16.0
3.13
1.383
18.63
-0.36
-0.85
EO
20.3
20.0
16.8
1.94
0.689
19.03
-0.13
-0.62
EP
17.1
17.6
17.6
0.29
0.098
17.43
-1.05
-1.54
ER
23.9
27A
29.8
3.01
1.308
27t2or
4.59
4.10 x
PB-







•
FJ







•
• 2 No data submitted TAG SYMBOLS	It s Above control limit
0 a Insufficient data	x = Determined to be an outlier	^ s Below controljimit j
-------
CRD-LV Performance Evaluation: Uranium-Radium in Water, 6-Dec-1996 11 /20 1
/
Radium-226








Lab
Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-ave) (known) Tnc
FN
15.3
155
15.4
0.10
0.039
15.40
-2.22
-2.71
-a*
GN
18.5
18.1
18.5
0.23
0.079
18.37
-0.51
-1.00
GQ
17.6
18.2
18.1
0.32
0.118
17.97
-0.74
-1.23

HK
19.5
19.5
19.2
0.17
0.059
19.40
0.08
-0.40

HL
20.7
17.9
16.5
2.14
0.827
18.37
-0.51
-1.00

HP
18.8
19.7
18.6
0.59
0.217
19.03
-0.13
-0.62

I
17.1
17.6
16.0
0.82
0.315
16.90
-1.36
-1.85

ID
18.8
16.9
17.5
0.97
0.374
17.73
-0.88
-1.37

,tCf
'







£r»T.
JE
21.7
18.8
21.4
1.59
0.571
20.63
0.80
0.31
^ J '
'¦ JG







w"* r*
•*:v~
OKs:









JH
'


















*
JS
23.0
21.0
24.0
1.53
0.591
22.67
1.97
1.48
«*
JX
20.0
21.9
20.7
0.96
0.374
20.87
0.93
0.44

JY
19.1
21.0
22.1
1.52
0.591
20.73
0.85
0.37

K
22.3
17.2
16.3
3.24
1.345
18.60
-0.38
-0.87

KH
19.5
18.5
18.5
0.58
0.197
18.83
-0.24
-0.73

KL
23.5
22.8
22.1
0.70
0.276
22.80
2.05
1.56










L
17.7
19.0
19.7
1.01
0.394
18.80
-0.26
-0.75

 * ¦
LT
21.7
21.7
17.5
2.42
0.827
20.30
060
0.12

LZ
19.8
20.2
20.0
0.20
0.079
20.00
0.43
-0.06

M
17.5
20.2
19.3
1.37
0.532
19.00
-0.15
-0.64

M3C%
mm
IPSpij

0.83
'QZU&
its
mm


¦
! fe







* *
Nit;









NH









NJ
20.7
19.9
23.6
1.95
0.728
21.40
1.24
0.75

NK









NO
-mm
'¦mim
12.0
122
0.433
1060
4m
•6.48
r£ J'
X
NT
19.8
19.9
19.8
0.06
0.020
19.83
0.33
-0.15

O
15.6
15.3
15.9
0.30
0.118
15.60
-2.11
-2.60

OB
19.9
19.4
21.9
1.32
0.492
20.40
0.66
0.17

OF
21.9
17.6
13.0
4.45
2.433
17.50
-1.01
-1.50

OM








>
OS









OX









or









p
15.9
21.1
15.5
3.12
1.195
17.50
-1.01
-1.50

PB
20.4
19.9
20.4
0.29
0.098
20.23
0.57
0.08

• 3 No data submitted

TAG SYMBOLS

It a Above control limit
0 s Insufficient data
>s
X 3
Determined to be an outlier
JJ s Below control limit
-------
12 / 20 CRD-LV Performance Evaluation: Uranium-Radium in Water, 6-Dec-1996
Radium-226
Lab
Rea. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
(grand-avg) (known) Tne
PG
17.8
17.8
17.5
0.17
0.059
17.70
-0.90
-1.39
•-'FQS'








• PV «
116-
^11;3;
11;7
0.21
0.079
11.53
-4.46

PW
19.8
21.0
18.4
1.30
0.512
19.73
0.28
-0.21
PX
21.0
20.6
21.0
0.23
0.079
20.87
0.93
0.44
Q
25.1
21.9
24.5
1.70
0.630
23.83
2.64
2.16
QM
19.4
19.9
19.7
0.25
0.098
19.67
0.24
-0.25
QQ
17.2
20.2
17.3
1.70
0.591
18.23
-0.59
-1.08
QU
18.0
17.4
17.4
0.35
0.118
17.60
-0.95
-1.44
QX
19.7
22.0
20.7
1.15
0.453
20.80
0.89
0.40
QZ
19.0
18.4
18.0
0.50
0.197
18.47
-0.45
-0.94
R
16.4
13.8
14.4
1.36
0.512
14.87
-2.53
-3.02 U
RD
22.3
22.2
22.1
0.10
0.039
22.20
1.70
1.21
RF
18.9
19.3
20.0
0.56
0.217
19.40
0.08
-0.40
JMT*








BK








RP







till
RR







ill
RX


M
o:3ff
0;136

4X9
fpli
RZ
20.6
20.1
19.6
0.50
0.197
20.10
0.49
0.00
S
20.7
21.1
21.1
0.23
0.079
20.97
0.99
0.50
sc
19.9
18.6
15.7
2.15
0.827
18.07
-0.69
-1.17
SD
15.7
15.5
15.1
0.31
0.118
15.43
-2.21
-2.69
SF
19.1
18.3
17.9
0.61
0.236
18.43
-0.47
-0.96
SI
14.9
15.4
14.5
0.45
0.177
i4.93
-2.49
"298
8L








SM
20.3
21.2
18.8
1.21
0.473
20.10
0.49
0.00 ^
SO








ss
17.8
15.9
20.4
2.26
0.886
18.03
-0.70
-1.19
sx;








sz
20.9
20.6
20.5
0.21
0.079
20.67
0.82
0.33
T







•ki
TD
22.1
22.4
19.6
1.54
0.551
21.37
1.22
0.73
TH








TL







¦J?
TN
18.1
16.1
14.3
1.90
0.748
16.17
-1.78
-2.27
TQ
16.6
19.6
19.4
1.68
0.591
18.53
-0.42
-0.90
TS







-
U
18.9
19.7
18.6
0.57
0.217
19.07
-0.11
-0.60
UE
16.9
18.8
17.6
0.96
0.374
17.77
-0.86
-1.35
UN








UP
22.3
23.8
22.8
0.76
0.295
22.97
2.14
1.66
UQ
19.1
20.4
19.6
0.66
0.256
19.70
0.26
:° 23
UZ







• t- ¦
VA
23.8
21.3
25.2
1.98
0.768
23.43
2.41
1.92
• s No data submitted	TAG SYMBOLS	ft s Above control limit
0 a Insufficient data	x s Determined to be an outlier	U s Below control limit
-------
CRD.LV Performance Evaluation: Uranium-Radium in Water, 8-Dec-1996 13 / 20
Radium-22&







	
Lab
Res. 1
Res. 2
Rea. 3
Exper.
Sigma
Rng anal
(R + SR)
Average
Normalized deviation
ferwid-Rve) fknrwn) Tncr
VH
18.4
22.2
23.8
2.77
1.120
21.47
1.26
0.79

VI
w
18.3
19.9
20.0
0.95
0.335
19.40
0.08
-0.40

37.0
35.0
33.0
2.00
0.788
35.00
9;09
8.60
X
wc
wdr
8.7
5,7
8.1
2.01
0.786
7.83
-6.80

5&w
•Jj" •
WH
19,2
20,2
20.2
0.58
0.197
19.87
0.35
-0.13

Wl







WJ
18.8
19.5
19.6
0.44
0.158
19.30
0.03
-0.46

;WO^






'pt
s%"









¥mef









iMs
¦wad? .









X
17.0
i€.6
19.5
1.67
0.571
17.70
-0.90
-1.39

XA
20.3
23 4
18.2
2.62
1.045
20.63
0.80
0.31










Data sorted by Laboratory Average
Averaire
T«R
Lab
Average
Taa
Lab
Average
Taa
Lab
3.77
X
AU
18.03

SS
19.33

BN
6.53
X
MX
18.07

sc
19.40

VI
7.83
X
WC
18.17

BM
19.40

RF
9.57
X
RX
18.23

QQ
19.40

HK
10.60
X
NO
18.23

AW
19.40

AL
11.53
X
PV
18.37

HL
19.43

BC
14.87

a
18.37

GN
19,60

CE
14.93

ai
18.43

SF
19.67

QM
15.40

FN
18.47

QZ
19.70

A
15,43

SD
18.63

TQ
19.70

UQ
15.60

O
18.53

C
19.73

PW
16.17

TN
18.60

K
19.77

BK
16.50

BA
18.60

CG
19.83

NT
16.70

BH
18.60

AZ
19.83

AK
16.90

I
18.63

EL
19.87

WH
17.43

EP
18.63

AF
20.00

IZ
17.50

P
18.73

E
20.00

cc
17.50

OF
18.80

L
20.10

8M
17.60

QU
18.83

KH
20.10

RZ
17.63

AH
18.87

DB
20.20

CA
17.70

PG
19.00

M
20.23

PB
17.70

X
19.03

EO
20.23

EB
17 73

ro
19.03

HP
20.30

L.T
17.77

UE
1907

V
20.30

DE
17.90

AE
19.17

DT
20.33

CJ
17.97

GQ
19.30

WJ
20.40

OB
• s No data submitted	TAG SYMBOLS	ft a Above control limit 1
0 ss Insufficient data	x a Determined to be an outlier	1} s Below control limit J
-------
14/20 CRD-LV Performance Evaluation: Uranium-Radium in Water, 6»Deeo-
¦2	0+2+4
Normalized deviation of the mean from the known value
Frequency distribution
*4
-4
. ——*

-2	&	+2	+4
Normalized deviation of the mean from the grand average
*6
. = No data submitted	TAG SYMBOLS	ft e Above control limit
0 & Insufficient data	x = Determined to be an outlier	3 Below control tinut j
-------
CRD-LV Performance Evaluation; Uranium-Radium in Water, 6>Dec-19M 15 V 20
Radium-228
Statistical Summary
151 Participants
The known value of this nuclide is 10.2 pCi/l with an exp#>ct*»d precision nf 2.fl; the contTol limits
are 5.7 to 14.7; the warning regions are 5.7 to 7.2 and 13.2 to 14.7
63(41,7 %) Failed to respond,
• 78(51.7 %) Within all limits


— -»2(1.3 %) In warning zone
8(5.3 "M Outliers	 .

but wlthfn control
i


Statistic
Respondents
Non-outliers
Mean
10.21
Grand Avg 10.10
Std. Dev.
2.56
1.18
Variance
6.54
1.39
% Coef. of Var.
25.06
11.69
% deviation of mean from known value
0.07
-0.95
Norm. dev. of mean from known value
0 00
-0.06
Median
10.33
10.33
% deviation of median from known value
1.31
1.31
Norm. dev. of median from knows value
0.05
0.11
8(9.1 %} Mora than 3 norm. S.D. •,
2(2.3 %) Between 2 and 3 norm. S.D.'
; 65(73.9 %) Within 1 norm. S.D.
of known value
13(14.8 %) Between 1 and 2 norm. S.O.
—
-------
(r			
16/20 CRD-LV Performance Evaluation: Uranium-Radium in Water, 6-Dec-1996
	
Radium-228








Lab
Res. 1
Res. 2

Exper.
Rng anal

Normalized deviation

Res. 3
Sigma
(R + SR)
Average
(grand-avg) (known) Tag
A
10.4
11.1
12.7
1.18
0.523
11.40
0.86
0.80

AE
8.2
7.0
8.4
0.76
0.318
7.87
-1.49
-1.55

AF
11.2
11.7
11.3
0.26
0.114
11.40
0.86
0.80

AH
7.3
8.8
8.8
0.87
0.341
8.30
-1.20
-1.27

AJ









AK
11.1
12.0
12.4
0.67
0.295
11.83
1.15
1.09

AL
11.2
10.9
10.3
0.46
0.204
10.80
0.46
0.40

AP
3 A
4.6
4.2
0.35
0.159
-''•'-4.23;
^3,0L
-3;97

Alt






¦*


AU
13
3.2
3.7
0.71
0.318
li#
-4.69
-4.78

AW
10.8
11.5
12.0
0.60
0.273
11.43
0.89
0.82

AZ
10.5
8.2
7.3
1.65
0.727
8.67
-0.96
-1.02

BA
11.2
12.7
12.4
0.79
0.341
12.10
1.33
1.27

BC
9.3
9.5
9.4
0.10
0.045
9.40
-0.47
-0.53

BO








;y \
BH
6.0
7.7
7.8
1.01
0.409
7.17
-1.96
-2.02

BK
9.3
9.4
9.0
0.21
0.091
9.23
-0.58
-0.64

BM
10.1
10.5
10.6
0.26
0.114
10.40
0.20
0.13

BN









BO
12.9
12.2
10.8
1.07
0.477
11.97
1.24
1.18

C
10.5
10.2
10.4
0.15
0.068
10.37
0.18
0.11

CA
8.6
10.2
9.8
0.83
0.363
9.53
-0.38
-0.44

CC
10.0
10.0
11.0
0.58
0.227
10.33
0.15
0.09

CE
9.6
9.9
10.5
0.46
0.204
10.00
-0.07
-0.13

CG
9.3
9.2
11.1
1.07
0.432
9.87
-0.16
-0.22

CJ
10.0
11.0
10.0
0.58
0.227
10.33
0.15
0.09

CM








• .-v.-'
cs
10.6
12.0
10.1
0.98
0.432
10.90
0.53
0.47

CXr








. - if
D








>. V
DB
10.9
10.4
10.5
0.26
0.114
10.60
0.33
0.27

DE
11.3
11.5
11.9
0.31
0.136
11.57
0.97
0.91

DI









DO









DR








;
DT
17 <2

;'17i7
OJ26
0.114
17;40X
4.86
4.60
k
DZ
10.2
8.6
9.4
0.80
0.363
9.40
-0.47
-0.53

E








** *;
EB
8.7
9.1
10.3
0.83
0.363
9.37
-0.49
-0.56

EL
10.5
9.9
11.1
0.60
0.273
10.50
0.26
0.20

EO
10.6
10.4
8.3
1.27
0.523
9.77
-0.22
-0.29

EP
8.8
9.0
8.7
0.15
0.068
8.83
-0.85
-0.91

ER
.








;fe:








*
FJ









• 3
No data submitted

TAG SYMBOLS

ft s Above control limit
in
G>
Insufficient data
x =
Determined to be an outlier
11 s Below control limit
-------
CRD-LV Performance Evaluation: Uranium-Radium in Water, 6-Dec-1996
17/20
Radium*228
Lab Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rng anal
(R + SR)
Normalized deviation
Average (grand-avg) (known) Tag
FN
8.1
8.0
8.1
9.0
8.6
9.9
8.5
8.1
6.8
•«
0.06
0.06
0.35
0.15
0.95
0.60
3.69
0.023
0.023
0.159
0.068
0.409
0.273
2.124
mm
8.07
•1.36
-0.71
•1.25
-0.25
-0.58
-0.93
0.58
-1.42
11.0
11.0
11.0
0.00
0.000
11.00
0.60
0.53
12.6
10.6
10.0
1.36
0.591
11.07
0.64
0.58
10.9
11.0
10.9
0.06
0.023
10.93
0.55
0.49
11.9
10.5
10.6
0.78
0.318
11.00
0.60
0.53
11.1
10.6
10.8
0.25
0.114
10.83
0.49
0.42
12.2
14.2
12.8
1.03
0.454
13.07
1.97
1.91
10.6
10.4
10.4
0.12
0.045
10.47
0.24
0.18
9.2
8.7
13.3
2.52
1.086
10.40
0.20
0.13
11.2
11.8
11.5
0.30
0.136
11.50
0.93
0.87
10.8
11.7
11.0
0.47
0.204
11.17
0.71
0.64
11.1
11.1
10.8
0.17
0.068
11.00
0.60
053
9.0
10.0
11.0
1.00
0.454
10.00
-0.07
-0.13
9.8
9.6
9.3
0.25
0.114
9.57
-0.36
-0.42
11.2
7.6
7.9
2.00
0.818
8.90
-0.80
-0.87
4.8
7.8
14.3
4.86
3.206
8.97
-0.76
•0.82
'9.4
8.5
9.2
0.47
0.204
9.03
-0.71
-0.78
10.1
10.9
10.6
0.40
0.182
10.53
0.29
0.22

¦SEP t
Sex? ,


iw*

£3%

mm

• a No data submitted
0 s Insufficient data
TAG SYMBOLS
Determined to be an outlier
ft a Above control limit
II a Below control limit
-------
J^18/20 CRD-LV Performance Evaluation: Uranium-Radium in Water, 6-Dec-I906
( Radium-228
Lab
Res. 1
Res. 2
Res. 3
Exper.
Rug anal

Normalized deviation

Sigma

fknrwn) Tag
PG>









pq-








•
PV
10.9
10.7
11.4
0.36
0.159
11.00
0.60
0.53

PW
10.9
10.3
10.9
0.35
0.136
10.70
0.40
0.33

PX







~>
Q
11,1
10.9
9.4
0.93
0.386
10.47
0.24
0.18

QM








'•i-
QQ








•V»*v
QUC

mm

0.50
0J227
jfoodi
IN-*;-."*
"smm
4*33
*786

QX

*SS3i8?*;!

0.10
0.04B
:_«4.r40i-

xf'
QZ
10.0
96
10.0
0.23
0 091
9.87
-0.16
-0.22

* a









RD
10.6
10.3
9.7
0.46
0.204
10.20
0.06
0.00

RF
11.6
10.5
10.9
0.50
0.227
10.97
0.58
0.51

BO:








~,
RK









HP








-
RR









RX
9 4
9.0
10.0
0.50
0.227
9.47
-0.42
-0.49

RZ
9.6
10.6
11.1
0.75
0.341
10.40
0.20
0.13

S
8.2
8.5
9.2
0.51
0.227
8.63
-0.98
-104

sc
9.9
10.7
9.8
0.49
0.204
10.13
0.02
-0.04

SD
9.5
10.0
10.6
0.55
0.250
10.03
-0.05
-0.11

SF
10.0
12.0
9.0
1.53
0.682
10.33
0.15
0.09

SI
8.9
8.4
8.7
0.25
0.114
8.67
-0.96
-1.02

SL









SM
8.4
8,9
6.1
1.49
0.636
7.80
-L53
-1.60

SO








' •*
ss
10.2
8.7
10.0
0.81
0.341
9.63
-0.31
-0.38

sx








-
sz
11,9
n.2
11.7
0.36
0.159
11.60
1.00
0.93

T








¦ -
TD
11.3
9.3
11,2
1.13
0.454
10.60
0.33
0.27

TH








•
TL








• '/
TN
9.0
10.2
9.7
0.60
0.273
9.63
¦0.31
-0.38

TQ
9.8
9.1
11.0
0.96
0.432
9.97
-0.09
-0.16

TS









U
10.7
11 5
11.2
0.40
0,182
11.13
0.69
0.62

UE
9.3
9.0
9.6
0.30
0.136
9.30
-0.54
-0.60

Uff-









UP
11.2
10.9
10.8
0.21
0.091
10.97
0.58
0.51

UQ
12.8
11.3
12.4
0.78
0.341
12.17
1.37
1.31

uz -






*


VA
4.9
6.6
4.8
0.44
0.182
5.10
-3.33
•3.40
X
* = No data submitted	TAG SYMBOLS	fl s Above control limit
0 ~ Insufficient data	x s Determined to be an outlier	U a Below control limit
-------
/ — 						
CRD-LV Performance Evaluation: Uranium-Radium in Water, 6-Dec-1996 19/20
Radium-228
Lab
Res. 1
Res. 2
Res. 3
VH
9.1
11.9
11.4
VI
10.7
10.6
10.6
mm
''if!, t . 'if-

-19.4
mm



WH
10.4
9.3
9.4
Exper. Rng anal
Normalized deviation
10.6
10.0
9.3
1.49
0.06
0.26
0.61
0.66
0.636
0.023
10.80
10.63
0.46
0.35
0.40
0.29

0.114~



&
0.250
9.70
-0.27
-0.33

0.296
9.97
-0.09
-0.16
6.5
7.6
6.2
0.74
0.318
6.77
-2.22
IT*3


-2.29
Average Tag
Lab
Average
Tag
Lab
Average
Tag
Lab
3.07 x
AU
9.47

RX
10.50

IfiL
3.50 x
qx
9.53

CA
10.53

PB
4.23 x
AP
9.57

NT
10.60

DB
5.10 x
VA
9.63

TN
10.60

TD
6.77
X
9.63

SS
10.63

VI
7.17
BH
9.70

WH
10.70

PW
7.80
SM
9.73

HK
10.80

VH
7.87
AE
9.77

EO
10.80

AL
8.07
FN
9.87

QZ
10.83

KH
8.23
GQ
9.87

CG
10.90

CS
8.30
AH
9.97

WJ
10.93

JY
8.63
S
9.97

TQ
10.97

UP
8.67
SI
10.00

NO
10.97

RF
8.67
AZ
10.00

CE
10.97

I
8.70
HP
10.03

SD
11.00

PV
8.83
EP
10.13

sc
11.00

NJ
8.90
O
10.20

RD
11.00

K
8.97
OF
10.33

SF
11.00

JS
9.03
P
10.33

CJ
11.07

JX
9.03
GN
10.33

cc
11.13

U
9.23
HL
10.37

c
11.17

MX
9.23
BK
10.40

RZ
11.40

AF
9.30
UE
10.40

LT
11.40

A
9.37
EB
10.40

BM
11.43

AW
9.40
DZ
10.47

Q
11.50

M
9.40
BC
10.47

L
11.57

DE
• 3 No data submitted
0 = Insufficient data

TAG SYMBOLS
x 3 Determined to be an outlier
ft
u
a Above control limit
b Below control limit
-------
20/20 CRD-LV Performance Evaluation: Uranium-Radium in Water, 6-Dec-1996
Radium-228
Data sorted by Laboratory Average
Average
Tag
Lab
Average
Tag
Lab
Average
Tag
Lab
11.60

SZ
12.10

BA
15.27
X
ID
11.83

AK
12.17

UQ
17.40
X
DT
11.97

BO
13.07

KL
19 37
X
WC






22.00
X
QU
% responding labs
Frequency distribution
10-
-T-
-6


—r"
*6
% responding labB
-4	-2	0	+2	+4
Normalized deviation of the mean from the known value
Frequency distribution
lo-
ci
-H-

t"
"T-
-6
-4	-2	0	*2	+4
Normalized deviation of the mean from the grand average

• s No data submitted
0 a Insufficient data
TAG SYMBOLS
x 3 Determined to be an outlier
ft s Above control limit
JJ. = Below control limit
-------