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Enclosed herewith is a copy of Quality Control Procedure regarding the Enewetak CleanUp Project. Also enclosed is a copy of the Quality Assurance Audit, Enewetak CleanUp. If you require anything further, please contact us.
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QUALITY CONTROL PROCEDURE To assure quality of results. on Enewetak Atoll. applies to the Eberline Pacific Lab (DOE Element) Eberline Pacific Lab chemist is responsible for the conthe Quality Control program. He will prepare blind spikes that processed in the normal procedure. At completion, the letters “QC” suffixed to the assigned sample number, and a comparison will be made between the known and obtained values. A. Plutonium and americium by alpha spectroscopy. a. Appropriate tracers will be added to determine the chemical recovery of plutonium and americium. b. The plutonium tracer will be cross checked by alpha counting against a NBS standard, at time of preparation. The americium tracer will be a NBS standard. c. Purity or tracer will.be determined by alpha spectrometry at time of preparation.
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a. A duplicate field sample will be run using the normal procedure once a week. 3. A reagent and glassware blank will be run after a high level (this to be determined by the chemist) sample has been proa. Soil from Enewetak Island will be used as a “background” c. This soil will be used to prepare the blind spikes. 5. Spiked soil samples: Enewetak soil used. a. A blind spike will be analyzed each week. This blind spike will have a known amount of PU and/or americium cowarab~e to amounts found in soil and the amounts of each will vary from week to week. a. Quality control data will be evaluated each aonth. 1. All gross alpha counters will be calibrated daily witlia plutonium background determined daily. 2. All gross Beta counters will be calibrated daily witfia stronas a calibration run daily when in use.
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4. The alpha spectrometer (s) will efficiency determimtion weekly 5. The gamma spectrometer (s) will have a background, energy ana using sources traceable to have a background, energy and efficiency determined weekly, using solution traceable to NBS. All calibration data will be recorded and filed. Logged QC will be available each month. A monthly quality control report will be compiled and reported to DOE/ERSP manager. With carbon copy to EIC.
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2-3-78 Quality Assurance Audit U A. Saaple Preparation Trailer 1. QA audit conducted proved sample processing *S completed according to schedule but the folloki.ngare being completed or added: (a) Log oi fistrument calibration data must be kept up weekly. (b) In-situ van samples must be ball milled ad have alpha, g-, tith dry soil samples should be completed in labs should be checked and log results is following all procedures proper3Y. gamma, plutonium and americium run. 2. Procedures need to have final documentation and appxmval by Da. 3. Urine samples have been processed to varify procedure has be done L. Uranium samples hve been picked and ~iIL be processd by 2/78. 5* Samples f~ed for alpha counting must be done in a consistent manner possible usualllyjust one person. 1. Instrument log of calibration and backgrounds is up to date. (But a system must be worked out to store this inforxzationon mag tape). Gamma calibration had been changed, but we are back at the original Window have been set on liquid scintillation counter to take care of %ckgrounds on alpha spectrometer and gamma spectrometer need to be taken and recorded weekly.
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‘y#& PROJECT: Enewetak Cleanup 2-3-78 Quality Assurance Audit +?4. 3/2 1. Need to make sure a monthly report going to EIC Mknager report is tabulated, an filed each month with at Pacific Lab. 2. Must have at least 5% of the totil samples processed data on spikes, blanks and blind duplicates. 1. Sample collection is being done according to procedures.
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QUALITY CONTROL REPCRT Enewetak Surface Soil Data on soil used for blank and Spike soil samples run in the quality control
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Y!OTE:This data was generated to prove the need of ball milling in cx!er to accomplish homogeneityin the samples.
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