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INDUSTRIAL
CHEMICALS
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date subject
:january 13, 1972
.
= PRELIMINARY PCS'TEST ERROR STUDY
h^erence
TO '
:H. J. Hoirner/H. L. Campbell - WGK J. T. Bell/M. D. Turner - Anniston
CC: R. E. Keller - GO W. B. Papageorge - GO W. R. Richard - GO R. H. Munch - Res. 2 ' G. L. Bratsch - WGK W. C. Engman - WGK A. E. Leisy - WGK E. E. Stewart - WGK<--------P. E. Heisler - GO E. G. Wright - Anniston J. C. Landwehr - Anniston J. F. Neineth/A. E. Peterson - J
The levels and types of PCB's found by each laboratory in the PCB fortified water samples are shown in the following -tables.
AROCLOR 1242
PPM Added
PPM Found
K/s
WGK
Ann.
0.00 0.57 0.57 0.57 0.57 5.68 5.68 5.68 5.68 0.00
ND ND ND
0.74 1.04 0.78_
NA NA 0.40
0.86 0.57 0.45
NjA ' NA
(1.07) 6.70 5.40
'mr
8.80 NA
-
5.25 6.55 9.90/
NA NA
8.40
ND ND ND
AROCLOR 1260
1 0.00
2 0.00 2 0.00 3 0.00 3 0.00 4 1.27 4 1.27 5 0.00 5 0.00 6 0.00
ND ND NA ND ND ND . NA .ND NA ND
ND ND NA ND NA 2.84 4.16 ND
` NA ND
ND ND ; ND ND ' NA 2.18 NA . ND * ND ND
.
PPM Added
AROCLOR 1254
"A/S
Found WGK
Ann.
1 0.00 - 2 1.04
2 1.04 3 0.10 3 0.10 4 1.04 4 1.04 5 0.52 5 0.52 6 0.10
ND 0.92 NA 0.07
0.06 ND NA 0.52 NA 0.06
ND 1.05 NA. 0.15 NA ND ND 1.20 NA 0.07
TOTAL PCB
ND 0.75 0.20 ND NA 2.95 NA ND ND 0.03
1 0.00 2 1.61 2 1.61' 3 O'. 67 3 0.67 4 7.99 4 7.99 5 6.10 5 6.10 6 0.10
ND - ND
1.66
2.09
NA NA
0.93 0.72
0.98
NA
1.07
JZ--54
NA
5.77 -77775
NA NA
0.06
0.07
ND 1.53 0.60 0.45 NA 10.53 NA 9.9 8.4 0.03
ND - None detected NA - Not analyzed
DSW 296282
';)in in
STLCOPCB4066226
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PRELIMINARY PCB TEST ERROR STUDY
January 13/ 1972 Page 2
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.... . SUMMARY OF STATISTICAL ANALYSIS - PCB TEST ERROR STUDY
. A. Aroclor 1242
.
95% Confidence Limits, % of Amount Present
1. Based on all data: 1*16.9+109.8%
2. Omitting stray point: 125.9+100.2%
3. Bias = 25.9%
"
' 4. 95% Limits, repeat results on same sample = +78.9%
'
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B. Aroclor 1254
95% Confidence Limits, % of Amount Present
1.. Based on all data: 82.3%+181.46% (limits not symmetrical)
* 2. Bias = 17.7%
.
Note: In four cases. No. 1254 was detected; in two cases - more than twice the amount present was picked up.
C. Aroclor 1260 - Data not analyzed.
,
' D. Total PCB
`
- 9.5% Confidence Limits, % of Amount Present
1. Based on data omitting stray point: 113.8+58.7%
2. Bias =13.8%
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. E. Comments
.
N 1. No Significant Differences Among Laboratories were ' . Detected.
. 2. No Significant Differences Among Samples were Detected.
3. Confidence Limits of Laboratory Means, Aroclor 1242.
A/S = 99.3+48.8% WGK = 133.6+48.8% Anniston = 118.0+48.8%
E. S. Tucker
J. D. Hinchen
db x
DSW 296283
STLCOPCB4066227