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Enc~o~ed herewith is a copy of Quality control Procedure regardhg the Enewetak CleanUp Project. Also enclosed is a copy of the Quality Assurznce Audit, Enewetak Cleanup. If you require anything further, please contact US. BEST COPY AVAIUBLE
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QUALITY CONTROL PROCEDURE To assure quality of results. This procedure applies to the Eberline Pacific Lab (DOE Element) on Enewetak Atoll. The Eberline Pacific Lab chemist is responsible for the conduct of the Quality Control program. He will prepare blind spikes that will be processed in the normal procedure. At completion, the letters “QC” will be 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 szmple 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 che 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 to amounts found in soil from week to week. of Pu and/or americium comparable and the amounts of each will vary a. Quality control data will be evaluated each month. 1. All gross alpha counters will be calibrated daily titli a plutonium background determined dafly. 2. All gross Beta counters will be calibrated daily’witli.a strontium-yttrium standard, and a background determined as well as a calibration run daily when in use.
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4. The alpha spectrometer (s) will have a background, energy and efficiency determination weekly using sources traceable to 5. The gamma spectrometer (s) will have a background, energy and efficiency determined weekly, using solution traceable to NBS. All calibration dzta 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 ESC.
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‘4. Sample Preparation Trailer 1. QA audit conducted proved sample processing was completed according to schedde but the folloting are being completed or (b) In-situ van sanples must be ball milled ad have alpha, g-, (c) 10% of ground zero and su&surface samples also need ball mil~ng~ gamm, Plutofium and ameficim‘m” (d) All Wrk with dry soil s~ples should be completed under hoods. (e) Balances in labs should be checked and log results weekly. 1. Chemistry lab is folloting all procedmes proper~. 2. Procedmes need to have final docmentaticn and appmv~ by D=. 3. Urine samples have been processed to varify proce~~-e ‘as be ‘one 4. Uranim samples &ive been picked arid kill be processed by 2/(8. 5. Samples fkned for alpha count- must be done in a consistent mar!er pssible usua17~ just one person. 1. Instrument log of calibration and backgrounds is up to must be workti out to store this information on mag tape]. . . &ma calibration had been changed, but we are back at the orlglnal Window have been set on liquid scintilktion counter to take care of %ckgromds on alpha spectrometer and gamma spectrometer need to be taken and recorded weekly.
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de Enewetak Cleanup 1. Need to make sure a monthly report is tabulated, an filed each month with reprt going to EIC Kb.nager at Pacific Lab. 2. Must have at least 5% of the total samples processed data on spikes, blanks and blind duplicates. 1. Sample collection is being done accordirg to procedures.
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Znewetak Surface Soil Data on soil used for blank and Spike soil samples run in the quality control II II It True value Observed
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II IF II 239pu II II It 241An :!OTE:This data was generated to prove the need of ball milling in crder to accomplish homogeneity in the samples.
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