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. ifL 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