DATA REPORTING PROCEDURE
DOE/ERSP PROCEDURE NO. 25
APPROVED:
I.
DATE DRAFTED: 24 October 1978
DATE REVISED: 27 June 1979
by Jack Aeby, EIC Lab Manager
11 July 1979 by Ernie Campbell (ERSP Manager)
Purpose
To standardize the method of reporting data from the DOE/ERSPlaboratory.
IL
Responsibility
The Eberline chemist is responsible for the preparation of the data report sheets in accordance with
this procedure. The Eberline Lab Manager will be responsible for the review of the reports prior to
their being submitted to the ERSP Technical Advisor and/or the DRI Statistician.
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Procedure
A.
Some low level samples may have a negative net count. In this case the sample activity
will be reported as zero,
B.
There will be no routine reporting of minimum detectable activity (MDA) or lower limit
of detection (LLD). Results will be reported with three significant figures plus a two
sigma error term, except for activities less than one pCi per appropriate unit, which
will be reported to two decimal places plus a two sigma error term.
C.
Each sample analysis result will include a two sigma counting error term. Results will
be reported as: sample activity in pCi per appropriate unit (grams, cubic meters, ete.)
+2o (in pCi per approppriate unit).
For all analysis results, except those from the alpha spectrometer, the two sigma error term will be
of the form:
Qo=
2
——
C.F.
where C.F. =
Te=
| gross counts
ay
(To)
+
background counts
a
(Te)?
a conversion factor to convert the 2 sigma term into pCi per appropriate unit
(grams, cubie meters, ete.)
count time
For alpha spectrometer results, the two sigma error term will be:
2o=
2x sample activity in pCi/g x
| tt
sample counts
A-25-1
+
te
spike counts