EPA
United States
Environmental Protection
Agency
k.i.viiu.1. . .Coring
Systems Laboratory
P.O. Box 93478
Las Vegas NV 89193-3478
EPA/600/R-92/212
October 1992
Research and Development
Gross Alpha-Beta in Water
Intercomparison Study
A Statistical Evaluation of
the September 18, 1992 Data
5514GR92NRD.COV-2
-------
Gross Alpha-Beta in Water
Intercomparison Study
September 18, 1992
Environmental Protection Agency
Environmental Monitoring Systems Laboratory
Las Vegas, Nevada
-------
UNITED STATES ENVIRONMENTAL PROTECTION AGENCY
OFFICE OF RESEARCH AND DEVELOPMENT
ENVIRONMENTAL MONITORING SYSTEMS LABORATORY-LAS VEGAS
P.O. BOX 93478
LAS VEGAS, NEVADA 89193-3478
(702798-2100)
Dear Participant,
Enclosed are the results of the Nuclear Radiation Assessment Division (EMSL-LV)
Intercomparison Study for Gross Alpha-Beta in Water; September 18, 1992.
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 Frank Novielli at 702/798-2159 or Patricia Honsa at 702/798-2141.
Sincerely,
Frank Novielli
Senior Chemist
Radioanalysis Branch
Enclosure
Note: This gross alphas-beta in water sample was prepared differently
from previous studies, and participants were instructed not to dilute
the sample. Results which are suspected to be from the analysis of
diluted samples were not included in the statistical calculations of
this report. The third result of the suspect data was dropped, and
the data is tagged with the symbol 0, which denotes insufficient data.
-------
NOTICE
This material has been funded wholly by
the U.S. Environmental Protection Agency.
It has been subject to the Agency's review,
and it has been approved for publication
as an EPA document.
-------
EMSL-LV Intel-comparison Study: Gross Alpha-Beta in Water, 18-8ep-19B2 1/17
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 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.
-------
EMSL-LV Intel-comparison Study: Gross Alpha-Beta in Water, 18-8ep-1992 2/17
Gross Alpha Statistical Summary 219 Participants
The known value of this nuclide is 45.0 pCi/1 with an expected precision of 11.0; the control limits
are 25.9 to 64.1; the warning regions are 25.9 to 32.3 and 57.7 to 64.1
8O(36.5 %) Failed to respond ,
2(O.9 %) Outliers
29(13.2 %) Out of control
but not an outlier
Statistic
. 72(32.9 %) Within all limits
Respondents
*• 36(16.4 %) In warning zone
but within control
Non-outliers
Mean
Std. Dev.
Variance
%Coef. ofVar.
% 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
37.75
15.78
248.99
41.80
-16.12
-0.46
35.00
-22.22
-0.63
Grand Avg 36.46
11.52
132.73
31.59
-18.97
-0.74
34.67
-22.96
-0.90
31(22.3 %) More than 3 norm. S.D.;
36(25.9 %) Between 2 and 3 norm. S.D.
, 42(30.2 %) Within 1 norm. S.D.
•
of known value
3O(21.6 %) Between 1 and 2 norm. S.D.
-------
3/17 EMSL-LV Intel-comparison Study: Gross Alpha-Beta in Water, 18-Sep-1992
Gross Alpha
Lab Res. 1
A
AE
AF
AI
AJ
AK
AL
AN
AO
AP
AH
AW
AY
AZ
BA
BB
BC
BG
BH
BK
BL
BM
BN
BO
BS
BW
C
CA
CE
CG
CJ
CK
CO
€1*
CQ
CS
CK
D
DB
DD
DE
DG
DH
DJ
• =
0 =
31.0
31.0
43.0
48.0
39.0
fik8
32.0
62.0
39.0
62.0
29.0
30.0
30.0
42.0
'7.0
48.0
mo
22.0
4.0
29.0
24.0
19.0
57.0
40.0
50.0
4.0
42.0
47.0
6.0
41.0
'
6.0
36.0
117.0
57.0
45.0
30.0
26.0
26.0
28.0
Res. 2
31.0
29.0
44.0
37.0
40.0
6.0
29.0
68.0
,
35.0
65.0
28.0
30.0
37.0
42.0
6.0
52.0
12.0
22.0
8.0'
23.0
25.0
20.0
61.0
41.0
37.0
4.0
40.0
45.0
- &0 '
36.0
5.0
40.0
101,0
57.0
46.0
35.0
26.0
21.0
23.0
Res. 3
32.0
27.0
45.0
43.0
41.0
33.0
75.0
36.0
55.0
29.0
33.0
35.0
49.0
41.0
21.0
'
26.0
28.0
19.0
60.0
43.0
42.0
f '
49.0
43.0
32.0
47.0
16$.$
56.0
54.0
31.0
26.0
20.0
23.0
No data submitted
Insufficient
data
x =
Exper.
Sigma
0.58
2.00
1.00
5.51
1.00
2.08
6.51
2.08
5.13
0.58
1.73
3.61
4.04
5.57
0.58
3.00
2.08
0.58
2.08
1.53
6.56
'
4.73
2.00
4.51
5.57
23,4$
0.58
4.93
2.65
0.00
3.21
2.89
Rng anal Normalized deviation
(R + SR) Average (grand-avg) (known) Tag
0.054
0.215
0.107
0.591
0.107
0.215
0.698
0.215
0.537
0.054
0.161
0.376
0.376
0.591
0.054
0.322
0.215
0.054
0.215
0.161
0.698
0.483
0.215
0.483
0.591
3.698
0.054
0.483
0.268
0.000
0.322
0.268
31.33
29.00
44.00
42.67
40.00
31.33
68.33
36.67
60.67
28.67
31.00
34.00
44.33
,
47.00
21.67
26.00
25.67
19.33
59.33
41.33
43.00
43.67
45.00
^
36.33
41.00
14333
56.67
48.33
32.00
26.00
22.33
24.67
TAG SYMBOLS
Determined
to be an
outlier
-0.81
-1.18
1.19
0.98
0.56
-0.81
5.02
0.03
3.81
-1.23
-0.86
-0.39
1.24
1.66
-2.33
-1.65
-1.70
-2.70
3.60
0.77
1.03
'
1.13
1.34
-
-0.02
0.71
16.83
3.18
1.87
-0.70
-1.65
-2.23
-1.86
-
IT == Above
Jl = Below
-2.15
-2.52
-0.16
-0.37
-0.79
0
-2.15
3.67 IT
#
-1.31
2.47
••
-2.57
-2.20
-1.73
-0.10
0"
0.31
0
-3.67 11
0
-2.99
-3.04 Jl
«
-4.04 I
*
2.26
-0.58
-0.31
0
-0.21
0.00
0
-1.36
* '•
0
-0.63
15.48 x
1.84
0.52
-2.05
-2.99
-3.57 ' U
-3.20 U
«
control limit
control limit
-------
EM8L-LV Intel-comparison
Study: Gross Alpha-Beta in Water, 18-8ep-1992 4/17
Gross Alpha
Lab
DM
DO
DP
DK
-^^•f-w
DT
DX
DZ
E
EA
EB
EH
JSI*
EN
EO
ER
E8
EV
EW
FE
JTP
FJ
FL
FK
np
FU
IPW
F2I
GE
GJ
GT
GZ
HE
BBC
m
HK
HL
HN
HP
HU
HY
I
1C
m
IE
W
Res. 1
- ' ,- -/' "-1
32.0
30.0
"" ' f
53.0
31.0
25.0
44.0
44.0
JS.O ''-
40
29.0
39.0
58.0
*'
25.0
'
34.0
** •*
15.0
,, ,
£0
22.0
1O.O
8$
34.0
38.0
44.0
&0
21.0
51.0
36.0
35.0
26.0
32.0
45.0
21.0
43.0
30.0
Res. 2
-', '**','*-':
21.0
31.0
'*f
49.0
30.0
28.0
41.0
56.0
', &0
4,0
•• S '
36.0
41.0
52.0
,
34.0
"""* j
39.0
j.
19.0
10
f
25.0
6.0
f
&0
36.0
46.0
44.0
:: 40 -
14.0
53.0
36.0
30.0
31.0
32.0
50.0
27.0
46.0
32.0
Res. 3
" / •* •* •* j f
30.0
33.0
'
41.0
29.0
30.0
41.0
47.0
' ', '
' ,
'
45.0
41.0
57.0
, ,,,,,
26.0
37.0
' -'
13.0
••
'
' "'
34.0
'
'
/ , ,
46.0
47.0
41.0
.•
16.0
49.0
36.0
27.0
34.0
34.0
44.0
29.0
38.0
33.0
• = No data submitted
0 a
Insufficient
data
x =
Exper.
Sigma
'/> ' '
5.86
1.53
" ' "
6.11
1.00
2.52
1.73
6.24
8.02
1.15
3.21
4.93
2.52
3.06
'
'>
6.24
f
6.43
4.93
1.73
3.61
2.00
0.00
4.04
4.04
1.15
3.21
4.16
4.04
'
1.53
Rnganal
(R + SR)
'- , ' ,» - <
0.591
0.161
' _"
0.644
0.107
0.268
0.161
0.644
' •
/
'
0.859
0.107
0.322
••
0.483
0.268
,
0.322
-
0.644
0.644
0.483
0.161
0.376
0.215
0.000
0.430
0.430
0.107
0.322
0.430
0.430
0.161
Normalized deviation
Average
/ '/',,/?'*?-
27.67
31.33
ff
47.67
30.00
27.67
42.00
49.00
,'
•" _.
36.67
40.33
55.67
_;
28.33
', •• '
36.67
' ,
15.67
•*
„ ' , ,
27.00
'
' '
38r67
43.67
43.00
17.00
51.00
36.00
30.67
30.33
32.67
46.33
25.67
42.33
31.67
TAG SYMBOLS
Determined
to be an outlier
(grand-avg) (known) Tag
' *' ^"'" ' '»
-1.39
-0.81
y
1.76
-1.02
-1.39
0.87
1.97
" ' '$,
' ,/
' " ,
0.03
0.61
3.02
fs ^ f
-1.28
,
0.03
••
-3.27
'
-1.49
'
•"
0.35
1.13
1.03
-3.06
2.29
-0.07
-0.91
-0.97
-0.60
1.55
-1.70
0.92
-0.76
It = Above
11 s Below
/' '" , ••••'•*•>
-2.73
-2.15
' •- - /- *
0.42
-2.36
-2.73
-0.47
0.63
'0
0
, ' •
-1.31
-0.73
1.68
»
-2.62
#
-1.31
•
-4.62 U
*
0
- - »
-2.83
0
*
•
0
-1.00
-0.21
-0.31
' 0
-4.41 Ji
0.94
-1.42
-2.26
-2.31
-1.94
0.21
-3.04 II
-0.42
*
-2.10
*
control limit
control limit
-------
5/17 EMSL-LV Intel-comparison Study: Gross Alpha-Beta in Water, 18-Sep-1992
Gross Alpha
Lab Res. 1
J
<$£t
JN
OP
JQ
JS
K
KC
KE
KH
KT
KX
KZ
L
LA
LE
LF
LL
LM
LR
LT
LX
M
MA
MB
MQ
MS
MV
MY
K
NA
NB
NE
NF
NH
NI
NJ
NK
NO
HP
NT
NZ
O
35.0
2.0
53.0
50.0
21.0
8-0
24.0
24.0
53.0
34.0
23.0
29.0
4.0
24.0
55.0
42.0
18.0
45.0
$&
7,0
30.0
56.0
38.0
*•
36.0
28.0
55.0
1XJ
38.0
25.0
27.0
25.0
21.0
57.0
27.0
Res. 2
34.0
•*
&0
62.0
48.0
19.0
&0
17.0
25.0
52.0
39.0
23.0
24.0
4,0
22.0
45.0
42.0
17.0
45.0
8.0
f»Q
30.0
56.0
53.0
- ,
38.0
30.0
59.0
2,0
30.0
40.0
20.0
32.0
19.0
54.0
24.0
Res. 3
32.0
,
42.0
41.0
20.0
, '
27.0
25.0
53.0
36.0
23.0
25.0
23.0
43.0
46.0
16.0
45.0
'
26.0
59.0
32.0
'
40.0
26.0
55.0
35.0
34.0
27.0
30.0
24.0
53.0
27.0
• s No data submitted
0 s
Insufficient
data
x =
Exper.
Sigma
1.53
. ,
10.02
4.73
1.00
5.13
0.58
0.58
2.52
0.00
2.65
1.00
6.43
2.31
1.00
0.00
••
2.31
1.73
10.82
' •
2.00
2.00
2.31
4.04
7.55
4.04
3.61
2.52
2.08
1.73
Rng anal Normalized deviation
(R + SR) Average (grand-avg) (known) Tag
0.161
1.141
0.483
0.107
,
0.537
0.054
0.054
0.268
0.000
0.268
0.107
0.644
0.215
0.107
0.000
0.215
0.161
1.243
0.215
0.215
0.215
0.430
0.805
0.376
0.376
0.268
0.215
0.161
33.67
,
,
*
52.33
46.33
20.00
22.67
24.67
52.67
36.33
23.00
26.00
23.00
47.67
43.33
17.00
45.00
••
28.67
57.00
41.00
"
38.00
28.00
56.33
34.33
33.00
24.67
29.00
21.33
54.67
26.00
TAG SYMBOLS
Determined
to be an
outlier
-0.44
ff f ff
,
f f ff f
2.50
1.55
-2.59
..
-2.17
-1.86
2.55
-0.02
-2.12
-1.65
-2.12
1.76
1.08
-3.06
1.34
-1.23
3.23
0.71
0.24
-1.33
3.13
-0.34
-0.55
-1.86
-1.18
-2.38
2.87
-1.65
tt s Above
11 = Below
-1.78
*
' 0
»
1.15
0.21
-3.94 U
0
-3.52 If
-3.20 U.
1.21
-1.36
-3.46 11
-2.99
.0...
-3.46 \
0.42
-0.26
. » 1
-4.41 U
0.00
* \
0
»
0
-2.57
1.89
-0.63
*
*
-1.10
-2.68
1.78
0
-1.68
-1.89
-3.20 li
-2.52
-3.73 U
•
1.52
»
-2.99
control limit
control limit
-------
1
EMSL-LV Intel-comparison Study: Gross Alpha-Beta in Water, 18-8ep-1992 6/17
Gross Alpha
Lab Res. 1
OA
OB
OE
OF
Of*
OU
OB
or
OY
OS
P
JPA
PB
PG
PM
PF
PQ
PR
PT
PV
PW
Q
QA
QC
QP
QQ
QT
QU
QW
QX
QZ
R
RB
RC
RD
RE
RG
RJ
RK
RM
RN
RQ
RR
• =
0 a
34.0
45.0
28.0
34.0
f %
'
&o
''
61.0
26.0
' -
35.0
31.0
22.0
s
33.0
39.0
29.0
12.0
51.0
13.0
38.0
-
22.0
26.0
35.0
'
27.0
46.0
51.0
43.0
70.0
58.0
47.0
22.0
27.0
30.0
12.0
29.0
Res. 2
38.0
29.0
30.0
47.0
f '
&0
'
59.0
27.0
35.0
33.0
20.0
38.0
41.0
26.0
12.0
52.0
15.0
43.0
23.0
23.0
37.0
27.0
50.0
52.0
43.0
31.0
44.0
42.0
25.0
28.0
31.0
13.0
30.0
Res. 3
32.0
31.0
31.0
42.0
- '
f
f *
f f
62.0
- ''
24.0
34.0
31.0
17.0
,
36.0
44.0
23.0
'
51.0
18.0
-
39.0
23.0
21.0
38.0
29.0
52.0
53.0
39.0
44.0
65.0
45.0
26.0
29.0
30.0
30.0
No data submitted
Insufficient
data
X S
Exper.
Sigma
3.06
8.72
1.53
6.56
'
1.53
' '
1.53
0.58
1.15
2.52
2.52
2.52
3.00
0.58
2.52
2.65
0.58
2.52
1.53
-
1.15
3.06
1.00
2.31
19.86
10.69
2.52
2.08
1.00
0.58
0.58
Rnganal
(R + SR) Average
0.322
0.859
0.161
0.698
'
0.161
0.161
-
0.054
0.107
0.268
0.268
0.268
0.322
0.054
0.268
0.268
/
0.054
0.268
0.161
0.107
0.322
0.107
0.215
3.084
1.243
0.268
0.215
0.107
0.054
0.054
34.67
35.00
29.67
41.00
-
/
, '
,
60.67
"
25.67
34.67
31.67
19.67
35.67
41.33
26.00
••
51.33
15.33
40.00
22.67
23.33
36.67
••
27.67
49.33
52.00
41.67
48.33
55.67
44.67
24.33
28.00
30.33
29.67
TAG SYMBOLS
Determined
to be an
outlier
Normalized deviation
(grand-avg) (known) Tag
-0.28
-0.23
-1.07
0.71
'
'
f
3.81
-1.70
,
-0.28
-0.76
-2.65
-0.13
0.77
-1.65
''
2.34
-3.33
0.56
-2.17
-2.07
0.03
'
-1.39
2.03
2.45
0.82
1.87
3.02
1.29
-1.91
-1.33
-0.97
-1.07
ft = Above
11 s Below
-1.63
-1.57
-2.41
-0.63
*
*
0
*
2.47
•
-3.04 U
* .,
-1.63
-2.10
-3.99 U
* f-'
-1.47
-0.58
-2.99
0 ,
1.00
-4.67 U
*
-------
7/17
EMSL-LV Intercomparison Study: Gross Alpha
•Beta in Water, 18-Sep-1992
Gross Alpha
Lab
RS
&T
RV
RW
RZ
S
SA
sc
SD
SO
SI
SI*
so
ss
ST
su
sx
sz
*r
TC
TE
TG
TH
11
13£
TL
m
TN
TO
IIP
TB
TY
U
W
X
Y
Z
Res. 1
, '
5.0
34.0
38.0
Co
40
47.0
53.0
48.0
6.0
42.0
4.0
24.0
27.0
32.0
30.0
4.0
32.0
22.0
52.0
7.0
9,0
46.0
108.0
22.0
21.0
67.0
44.0
45.0
40.0
47.0
29.0
Res. 2
, '
&0
30.0
37.0
5.0
40
,
54.0
56.0
48.0
§.0
42.0
40
26.0
20.0
30.0
31.0
6,0
32.0
24.0
45.0
7.0
3.0
47.0
10S.0
23.0
21.0
65.0
51.0
44.0
35.0
55.0
32.0
Res. 3
••
-
, -
^
37.0
29.0
53.0
43.0
59.0
48.0
21.0
21.0
28.0
31.0
29.0
20.0
45.0
39.0
fc.O
24.0
15.0
-
61.0
41.0
45.0
40.0
34.0
29.0
Data
Average
15.33
15.67
17.00
Tag
U
U
U
Lab
Q
FJ
LR
Exper.
Sigma
-
•'
3.51
4.93
3.79
6.81
6.35
3.46
2.52
3.79
2.00
0.58
••
1.73
2.00
4.04
4.36
0.00
1.00
3.46
..
-. *
3.06
5.13 .
0.58
2.89
10.60
1.73
Rng anal
(R + SR)
"
0.376
0.483
0.376
0.698
,.
0.591
0.322
0.268
0.376
0.215
0.054
0.161
0.215
0.376
-
0.430
o.ooo
0.107
0.322
0.322
0.537
0:054
0.268
1.243
0.161
Average
•
*
'
33.67
34.67
51.33
50.67
51.67
44.00
23.67
22.67
30.00
30.67
31.00
22.00
47.33
44.00
Normalized
(grand-avg)
f f
' " t'
-0.44
-0.28
'
2.34
2.24
2.39
1.19
-2.02
-2.17
-1.02
-0.91
••
-0.86
-2.28
1.71
1.19
deviation
(known)
f \ ••
'
-1.78
-1.63
1.00
0.89
1.05
-0.16
*
-3.36
-3.52
-2.36
-2.26
••••••
-2.20
-3.62
0.37
-0.16
Tag
#'
0
0
0"
«
«
0
0
u
u
0 |
I
11
0
0
4,v/o>vv 4.J.AV "»9
-------
EMSL-LV Intercomparison Study:
Gross Alpha
Gross Alpha-Beta in Water,
18-Sep-1992 8 / 17
Data sorted by Laboratory Average
Average Tag
21.67 U
22.00 U
22.33 U
22.67 Ji
22.67 U
22.67 U
23.00 U
23.00 li
23.00 JJ
23.33 U
23.67 tt
24.33 tt
24.67 11
24.67 11
24.67 tt
25.67 11
25.67 tt
25.67 tt
26.00
26.00
26.00
26.00
26.00
27.00
27.67
27.67
27.67
28.00
28.00
28.33
28.67
28.67
29.00
29.00
29.67
29.67
30.00
30.00
30.00
30.33
30.33
30.67
30.67
• 3 No data submitted
0 = Insufficient data
Lab
BH
TG
DG
SU
QQ
KE
TN
LE
KZ
QT
ST
RJ
NJ
KB
DH
P
I
BM
PT
O
L
DE
BL
FU
QX
DZ
DO
RM
NB
EV
MQ
AW
NK
AE
RR
OE
Z
SX
DX
RN
HP
SZ
HN
Average
31.00
31.00
31.33
31.33
31.33
31.67
31.67
32.00
32.67
33.00
33.67
33.67
34.00
34.33
34.67
34.67
34.67
35.00
35.67
36.00
36.33
36.33
36.67
36.67
36.67
36.67
38.00
38.33
38.67
40.00
40.00
40.33
41.00
41.00
41.00
41.33
41.33
41.67
42.00
42.33
42.67
43.00
43.00
TAG
Tag Lab
TE
AY
DP
AL
A
PG
IE
DD
HU
NI
RV
J
AZ
NH
RW
PB
OA
OB
PQ
HL
KX
CO
QU
FE
EN
AP
NA
X
GT
QC
AJ
EO
OF
MV
cs
PR
C
RB
E
1C
AI
HE
CA
Average
43.33
43.67
43.67
44.00
44.00
44.00
44.33
44.67
44.67
45.00
45.00
45.33
45.33
46.33
46.33
47.00
47.33
47.67
47.67
48.33
48.33
49.00
49.33
50.67
51.00
51.33
51.33
51.67
52.00
52.33
52.67
54.67
55.67
55.67
56.33
56.67
57.00
59.33
60.67
60.67
64.33
68.33
108.00
143.33
SYMBOLS
x = Determined to be an outlier
Tag Lab
LL
GZ
CG
TL
SO
AF
BA
W
RE
LT
CJ
Y
U
JS
HY
BC
TH
LF
DT
RC
DB
EA
QZ
SD
HK
SC
PW
SI
R
JQ
KT
NT
RD
ER
NE
D
MS
BW
OY
AR
It TY
tt AN
x TM
x CX
tt s Above control limit
tt s Below control limit
-------
9/17 EMSL-LV Intel-comparison Study: Gross Alpha-Beta in Water, 18-Sep-1992
Gross Alpha
% Frequency distribution of responding labs(expected prec. vs known value)
•* '4 exp.prec. -2 known +2 exp'prec' **
value
% Frequency distribution of responding labs(std. dev. vs mean value)
..,...t,iiii|l.ii|...Mli.i,.i..T.... .
stH Hev -2 0 +2 otH HPV. +4
•* '4 std. dev. -2 ^^ +2 std. dev.
value
-------
EMSL-LV Intel-comparison Study: Gross Alpha-Beta in Water, 18-Sep-1992 10/17
Gross Beta Statistical Summary 219 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
77(35.2 %) Failed to respond ;
5(2.3 %) Outliers •—
40(18.3 %) Out of control
but not an outlier
Statistic
, 79(36.1 %) Within all limits
Respondents
• 18(8.2 %) In warning zone
but within control
Non-outliers
Mean
Std. Dev.
Variance
%Coef. ofVar.
% 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
59.38
114.45
13098.83
192.75
18.76
0.08
49.00
-2.00
-0.01
Grand Avg 48.61
9.14
83.51
18.80
-2.78
-0.15
48.67
-2.67
-0.15
47(33.1 %) More than 3 norm. S.D..
16(11.3 %) Between 2 and 3 norm. S.D
.48(33.8 %) Within 1 norm. S.D.
of known value
31(21.8 %) Between 1 and 2 norm. S.D.
-------
117
17 EMSL-LV Intel-comparison Study: Gross Alpha-Beta in Water, 18-Sep-1992
Gross Beta
Lab
A
AE
AF
AI
AJ
AK
AL
AN
A0
AP
AR
Atf
AW
At
AZ
BA
BB
BC
BG
BH
BK
BL
BM
BN
BO
B8
BW
C
CA
CE
CG
CJ
OR
CO
CP
CQ
CS
CX
D
DB
DD
DE
DG
DH
DJ
Res. 1
47.0
44.0
60.0
51.0
46.0
~ &0
38.0
07,0
47.0
55.0
48.0
140
41.0
60.0
4,0
31.0
28.0
49.0
0*0
51.0
51.0
51.0
34.0
51.0
31.0
?,0
50.0
46.0
7,0
36.0
47.0
7.0
54.0
1120,0
59.0
71.0
42.0
47.0
52.0
49.0
Res. 2
45.0
42.0
58.0
52.0
45.0
8.0
41.0
86.0
47.0
55.0
50.0
14.0
51.0
62.0
40
47.0
29.0
48.0
6,0
50.0
51.0
52.0
35.0
52.0
49.0
8,0
51.0
43.0
7,0
33.0
40.0
7.0
53.0
J400.0
59.0
64.0
44.0
48.0
43.0
45.0
Res. 3
47.0
42.0
51.0
50.0
42.0
-
38.0
0&0
51.0
56.0
••
50.0
46.0
62.0
36.0
28.0
48.0
48.0
52.0
48.0
36.0
51.0
44.0
50.0
46.0
-
49.0
42.0
45.0
1700,0
59.0
72.0
30.0
48.0
35.0
47.0
• 3 No data submitted
0 =
Insufficient
data
x 3
Exper.
Sigma
1.15
1.15
4.73
1.00
2.08
1.73
1.18
2.31
0.58
1.15
5.00
1.15
8.19
0.58
0.58
1.53
0.58
2.08
1.00
0.58
9.29
-
0.58
1.73
•*
8.50
3.61
4.93
290,00
0.00
4.36
7.57
0.58
8.50
2.00
Rnganal
(R + SR)
0.236
0.236
1.120
0.236
0.473
0.354
0.23$
••
0.473
0.118
0.236
1.345
0.236
2.695
0.118
0.118
0.354
0.118
0.473
0.236
0.118
3.146
0.118
0.354
2.695
0.827
1.120
*4 t^ft. x^rtty
jj. ffff.tX
-------
EMSL-LV Intel-comparison
Gross Beta
Lab
DM
DO
DP
BB
DT
DX
DZ
E
EA
EB
EH
EL
EN
EO
Eg
EV
EW
FE
FJP
FJ
Ft
FK
FP
FU
FW
F2
GE
GJ
O1?
GZ
HE
HH
HI
HK
HL
HN
HP
HU
HY
I
1C
m
IE
IU
• =
0 =
Res. 1
50.0
54.0
53.0
,., 7.0
52.0
50.0
49.0
49.0
45.0
&0
6.0
47.0
51.0
51.0
50.0
41.0
,
53.0
,
€,0
' ,
44.0
47.0
iao
f -ft ft ^%
• .dfi+%r
61.0
51.0
'9,0
37.0
61.0
76.0
51.0
63.0
'
48.0
55.0
44.0
33.0
Res. 2
51.0
57.0
49.0
~',,f,0; - '
49.0
51.0
50.0
51.0
46.0
6.0
&0
47.0
62.0
51.0
-
59.0
-
44.0
'-
46.0
6.0
47.0
s .
48.0
mo ,
is&o ,
66.0
48.0
' 7.0 \ -
42.0
51.0
76.0
52.0
63.0
'
46.0
54.0
50.0
31.0
Res. 3
46.0
58.0
55.0
' -,
49.0
49.0
51.0
47.0
45.0
'
47.0
85.0
52.0
48.0
' '
42.0
48.0
47.0
49.0
97lO
57.0
49.0
..' .. ..
43.0
54.0
76.0
51.0
64.0
50.0
54.0
44.0
29.0
No data submitted
Insufficient
data
x 3
Study: Gross Alpha-Beta in Water, 18-8ep-1992 12/17
Exper.
Sigma
2.65
2.08
3.06
-
1.73
1.00
1.00
2.00
0.58
'
0.00
17.35
0.58
5.86
1.53
3.61
1.73
i.
1.00
43.10
4.51
1.53
'' /,
3.21
5.13
0.00
0.58
0.58
2.00
0.58
3.46
2.00
Rng anal Normalized deviation
(R + SR) Average (grand-avg) (known)
0.591
0.473
0.709
f
0.354
0.236
0.236
0.473
0.118
,
0.000
6.746
0.118
1.570
0.354
0.827
0.354
0.236
17.99?
1.120
0.354
'
0.709
1.345
o.ooo
0.118
0.118
0.473
0.118
0.709
0.473
49.00
56.33
52.33
r/ ,
50.00
50.00
50.00
49.00
45.33
' /
47.00
66.00
51.33
'
52.33
f
42.33
49.00
,
46.00
••
48.00
. 108.33
61.33
49.33
''
40.67
55.33
76.00
51.33
63.33
48.00
54.33
46.00
31.00
TAG SYMBOLS
Determined
to be an
outlier
0.13
2.68
1.29
' ', '
0.48
0.48
0.48
0.13
-1.14
..
-0.56
6.02
0.94
'
1.29
-2.17
0.13
,
-0.90
-0.21
'
20.69
4.41
0.25
-2.75
2.33
9.49
0.94
5.10
-0.21
1.98
-0.90
-6.10
ft 3 Above
11 3 Below
-0.35
2.19
0.81
* '
0.00
0.00
0.00
-0.35
-1.62
-1.04
5.54
0.46
0.81
-2.66
-0.35
-1.39
-0.69
2&21
3.93
-0.23
'
-3.23
1.85
9.01
0.46
4.62
-0.69
1.50
-1.39
-6.58
control
control
Tag
0 .
0
0
ft
»'
>
*
•
•,
*
0
•
*
*
0
X
.........
* 0
T
ft
*
ft
*
*
U
limit
limit
-------
13 /
17 EMSL-LVIntercomparison Study: Gross Alpha-Beta in Water, 18-8ep-1992
Gross Beta
Lab
J
«Hf
ON
OF
JQ
JS
K
KC
KE
KH
KX
KZ
L
LA
LE
LF
LO
LL
LM
LR
LS
LT
IX
m
MA
MB
MQ
MS
MV
MV
•"i* •
N
NA
NB
NE
INF
NH
NI
NJ
NK
NO
JSP
NT
Mi
o
• =
0 =
Res. 1
52.0
,
ao
''
61.0
45.0
W&
54.0
47.0
40.0
55.0
53.0
6.0
42.0
49.0
49.0
,
46.0
50.0
l&O.
69.0
&0
35.0
50.0
41.0
••
f'' f
45.0
53.0
37.0
10#
52.0
39.0
43.0
32.0
47.0
48.0
54.0
Res. 2
50.0
'
3&
65.0
42.0
14.0
47.0
47.0
42.0
56.0
57.0
6.0
49.0
50.0
50.0
56.0
50.0
JIM*
75.0
f.Q
36.0
51.0
38.0
•"
f
50.0
49.0
40.0
10,0
55.0
42.0
39.0
29.0
54.0
49.0
51.0
Res. 3
50.0
'
66.0
41.0
54.0
48.0
44.0
55.0
54.0
.
43.0
43.0
56.0
'
65.0
50.0
%
76.0
32.0
51.0
35.0
f
f f
50.0
49.0
33.0
52.0
40.0
43.0
32.0
61.0
49.0
52.0
No data submitted
Insufficient
data
X S
Exper.
Sigma
1.15
,
-
2.65
2.08
4.04
0.58
2.00
0.58
2.08
3.79
3.79
3.79
9.50
-
0.00
,
3.79
2.08
0.58
3.00
,
f S
-
2.89
2.31
3.51
1.73
1.53
2.31
1.73
7.00
0.58
1.53
Rnganal
(R + SR)
0.236
0.591
0.473
0.827
0.118
0.473
0.118
0.473
0.827
0.827
0.827
3.371
0.000
0.827
0.473
0.118
0.709
0.591
0.473
0.827
0.354
0.354
0.473
0.354
2.245
0.118
0.354
Normalized deviation
Average
50.67
'
64.00
42.67
51.67
47.33
42.00
55.33
54.67
44.67
47.33
51.67
55.67
50.00
73.33
34.33
50.67
38.00
48.33
50.33
36.67
53.00
40.33
41.67
31.00
54.00
48.67
52.33
TAG SYMBOLS
Determined
to be an outlier
(grand-avg) (known)
0.71
•* * ,
"
, '
5.33
-2.06
1.06
-0.44
-2.29
2.33
2.10
-1.37
-0.44
1.06
2.44
0.48
-
8.56
f
-4.95
0.71
-3.68
f
J
-0.10
0.60
-4.14
1.52
-2.87
-2.41
-6.10
1.87
0.02
1.29
It = Above
JJ = Below
0.23
' " "
..
4.85
-2.54
0.58
-0.92
-2.77
1.85
1.62
-1.85
-0.92
0.58
1.96
0.00
8.08
-5.43
0.23
-4.16
.•
-0.58
0.12
-4.62
1.04
-3.35
-2.89
-6.58
1.39
-0.46
0.81
control
control
Tag
»
0
*
•*
T
0
0
*
»
»
«
0
tr
0
Ji
11
*
«
U
0
Ji
Ji
•
»
limit
limit
-------
EMSL-LV Intel-comparison Study: Gross Alpha-Beta in Water, 18-8ep-1992 14/17
Gross Beta
Lab
OA
OB
OE
OF
OL
OM
OS
OT
OY
OZ
P
PA
PB
PC
PB
PG
PM
PF
PQ
PR
PT
PV
PW
Q
QC
QQ
QT
QU
QW
QX
QZ
R
RB
RC
RD
RE
RG
RJ
RK
RM
RN
RQ
RR
Res. 1
62.0
70.0
55.0
32.0
, '
6.0
53.0
50.0
57:0
"*"* f *
48.0
51.0
46.0
48.0
55.0
36.0
29*0
53.0
39.0
28.0
39.0
£&0
47.0
- '
45.0
57.0
44.0
34.0
26.0
71.0
49.0
53.0
56.0
46.0
€.0
49.0
Res. 2
60.0
52.0
53.0
47.0
' ''
-
'7.0 '- ,
51.0
50.0
60.0
,
45.0
52.0
48.0
/
49.0
56.0
38.0
23,0
49.0
43.0
34.0
38.0
73,0
48.0
f f
47.0
57.0
50.0
43.0
30.0
63.0
47.0
61.0
58.0
46.0
6.0
47.0
Res. 3
59.0
44.0
51.0
46.0
46.0
48.0
';''
66.0
45.0
49.0
47.0
'
47.0
57.0
35.0
44.0
46.0
33.0
38.0
4&0
49.0
48.0
60.0
47.0
40.0
34.0
63.0
49.0
61.0
58.0
45.0
50.0
• = No data submitted
0 =
Insufficient
data
X 3
Exper.
Sigma
1.53
13.32
2.00
8.39
'
%
3.61
1.15
4.58
f
1.73
'
1.53
1.00
1.00
1.00
1.53
4.51
3.51
3.21
0.58
' 7.23
1.00
1.53
1.73
3:00
4.58
4.00
4.62
1.15
4.62
1.15
0.58
1.53
Rnganal
(R + SR)
0.354
4.946
0.473
2.470
-
',
0.827
0.236
1.120
0.354
0.354
0.236
0.236
0.236
0.354
1.120
0.827
0.709
0.118
3M8S0
0.236
0.354
0.354
0.709
1.120
0.945
0.945
0.236
0.945
0.236
0.118
0.354
Normalized deviation
Average
60.33
55.33
53.00
41.67
_,
'
' '
50.00
49.33
,
61.00
'
46.00
50.67
47.00
48.00
56.00
36.33
48.67
42.67
31.67
38.33
3133 ,
48.00
f
46.67
58.00
47.00
39.00
30.00
65.67
48.33
58.33
57.33
45.67
48.67
TAG SYMBOLS
Determined
to be an outlier
(grand-avg) (known) Tag
4.06
2.33
1.52
-2.41
' ', -
* f f
•"
0.48
0.25
4.29
/ '
-0.90
-
'
0.71
-0.56
-0.21
2.56
-4.25
0.02
-2.06
-5.87
-3.56
' tl.34 •'
-0.21
'
-0.67
3.25
-0.56
-3.33
-6.45
5.91
-0.10
3.37
3.02
-1.02
0.02
ft s Above
II 3 Below
3.58 ft
1.85
1.04
-2.89
*
• ;
0
0.00
-0.23
'"-•
3.81 ft
*
-1.39
*
*
0.23
-1.04
*
-0.69
2.08
-4.73 II
0
-0.46
-2.54
-6.35 II
-4.04 II
mas x
-0.69
#
-1.15
2.77
-1.04
-3.81 II
-6.93 II
5.43 ft
-0.58
•
2.89
•
2.54
-1.50
0
-0.46
control limit
control limit
-------
15/17
EMSL-LV Intel-comparison Study: Gross Alpha-
Beta in Water, 18-Sep-1992
Gross Beta
Lab
RS
RT;
RU
RV
RW
RZ
S
SA
SC
SD
SO
SI
SL
SO
ss
ST
SU
SX
sz
T
TA
TC
TE
TG
TH
Tl
TK
*r&
TM
TN
TO
TJ*
IB
TY
U
W
X
Y
Z
Res. 1
',
4.®
45.0
60.0
40
7.0
58.0
37.0
50.0
5.0
51.0
6.0
55.0
40.0
37.0
41.0
8.0
53.0
31.0
31.0
20.0
77.0
67.0
53.0
48.0
61.0
47.0
48.0
43.0
25.0
39.0
60.0
Res. 2
' -
; 40
43.0
53.0
4.0
?>0
59.0
39.0
56.0
S.0
52.0
6,0
50.0
31.0
29.0
41.0
7,0
50.0
34.0
35.0
17.0
69.0
86,0'
53.0
51.0
72.0
-
45.0
45.0
46.0
23.0
41.0
82.0
Res. 3
'
-
52.0
53.0
56.0
38.0
58.0
52.0
48.0
36.0
33.0
42.0
52.0
34.0
31.0
58.0
07.0
53.0
52.0
75.0
43.0
50.0
47.0
25.0
40.0
63.0
Exper.
Sigma
'
V
4.73
4.04
1.53
1.00
4.16
0.58
_,
3.61
4.51
4.00
0.58
1.53
1.73
2.31
9.54
6.08
0.00
2.08
7.37
' ' • '
2.00
2.52
2.08
1.15
1.00
11.93
Rnganal
(R + SR)
-
1.120
0.827
'
'
0.354
0.236
0.945
0.118
0.827
1.120
0.945
0.118
'
0.354
0.354
0.473
3.371
1.570
0.000
0.473
2.245
0.473
0.591
0.473
0.236
0.236
4.046
Average
-
..
'
46.67
55.33
'
57.67
38.00
54.67
51.67
51.00
35.67
33.00
41.33
51.67
33.00
32.33
68.00
90.00
53.00
50.33
69.33
*,
45.00
47.67
45.33
24.33
40.00
68.33
Normalized deviation
(grand-avg) (known)
; -
, '
-0.67
2.33
3.14
-3.68
2.10
1.06
0.83
-4.48
-5.41
-2.52
1.06
-5.41
-5.64
6.72
1434
1.52
0.60
7.18
..
*
-1.25
-0.33
-1.14
-8.41
-2.98
6.83
'
-
-1.15
1.85
2.66
-4.16
1.62
0.58
0.35
-4.97
-5.89
-3.00
0.58
-5.89
-6.12
6.24
13.86
1.04
0.12
6.70
'
-1.73
-0.81
-1.62
-8.89
-3.46
6.35
Tag
».,
0 •
«
0
0
*
^
«
0
0
U
Ji
0
* ;
*
J|
Ji
0
it
*
it
«
»
u
u
tr
Data sorted by Laboratory Average
Average
24.33
28.33
30.00
Tag
Ji
U
U
Lab
X
BG
RC
Average
• s No data submitted
0 = Insufficient data
31.00
31.00
31.67
Tag
Ji
Jl
Lab
NK
IU
QC
Average Tag
TAG SYMBOLS
x 3 Determined to be an outlier
32.33 Ji
33.00 U
33.00 U.
ft s Above
JJ- s Below
control
control
Lab
TH
TG
SX
limit
limit
-------
EMSL-LV Intel-comparison Study:
Gross Beta
Gross Alpha-Beta in Water,
18-Sep-1992 16
in
Data sorted by Laboratory Average
Average Tag
34.33 Ji
35.00 li
35.67 li
36.33 U
36.67 U
38.00 U
38.00 U
38.00 U
38.33 U
38.67 U
39.00 li
39.00 Jl
39.33 H
40.00 li
40.33 U
40.67 U
41.33
41.33
41.67
41.67
42.00
42.33
42.67
42.67
42.67
43.00
43.33
44.33
44.67
45.00
45.00
45.33
45.33
45.67
46.00
46.00
46.00
46.00
46.33
46.67
46.67
47.00
47.00
47.00
• 3 No data submitted
0 3 Insufficient data
Lab
MQ
BW
SU
PT
NE
SD
MV
BC
QQ
DD
RB
AL
CO
Y
NI
HI
SZ
CA
OF
NJ
KX
FE
Q
K
AE
CP
DG
AJ
LE
TY
CJ
W
EA
RN
PB
IE
FU
AZ
A
RV
QX
R
PM
EL
Average
47.00
47.33
47.33
47.67
47.67
48.00
48.00
48.00
48.00
48.33
48.33
48.33
48.33
48.67
48.67
48.67
49.00
49.00
49.00
49.33
49.33
49.33
49.67
50.00
50.00
50.00
50.00
50.00
50.33
50.33
50.33
50.33
50.67
50.67
50.67
50.67
51.00
51.00
51.33
51.33
51.33
51.33
51.67
51.67
TAG
Tag Lab
DH
LF
KH
U
DE
QU
PQ
I
GE
RE
NA
BH
AP
RR
PW
NT
FJ
E
DM
OY
HE
AW
BL
OT
LT
DZ
DX
DT
TN
NB
CG
BO
PG
MS
J
CS
ST
AI
HP
EO
C
BM
TE
SO
Average
51.67
51.67
52.33
52.33
52.33
53.00
53.00
53.00
54.00
54.33
54.67
54.67
55.33
55.33
55.33
55.33
55.33
55.67
56.00
56.33
56.33
57.33
57.67
58.00
58.33
59.00
60.33
61.00
61.33
61.33
63.33
64.00
65.67
66.00
68.00
68.33
69.00
69.33
73.33
76.00
81.33
85.67
90.00
108.33
SYMBOLS
x 3 Determined to be an outlier
Tag
IT
IT
tr
tr
tr
tr
tr
tr
IT
tr
tr
IT
tr
tr
tr
X
X
X
X
1T s Above control
U s Below control
Lab
LL
KE
O
EV
DP
TM
OE
NH
NO
1C
SI
L
RW
OB
KZ
HK
AR
LR
PR
DO
AF
RM
SC
QZ
RJ
D
OA
P
GZ
BA
HU
JS
RD
EN
TK
Z
DB
TO
MA
HL
QT
AN
TL
GT
limit
limit
-------
17/17 EMSLrLV Intel-comparison Study: Gross Alpha-Beta in Water, 18-Sep-1992
Gross Beta
Data sorted by Laboratory Average
Average Tag Lab j Average Tag Lab Average Tag Lab
1406.67 x CX
% Frequency distribution of responding labs(expected prec. vs known value)
10-
r- \ •¥•-•-¥••• Tiiii|JlMlliM -•'?• ••
i- --T —I --
-4 exp. prec. -2 ^6^ +2 exp. prec.
value
% Frequency distribution of responding labs(std. dev. vs mean value)
10-
•T»»f- •• j.iHfHil|i 1-V •• T— T- . •• T*
A dfiv. -2 0+2
std. dev. -2 0+2 std. dev.
mean
value
• s No data submitted TAG SYMBOLS IT = Above control limit
0 s Insufficient data x = Determined to be an outlier •!)• s Below control limit
------- |