om BY: 44 ON PROJECT. Sf oA) DATE: 2=3-78 A. SUBJECT. Enewetak Cleanup 4 Quality Assurance Audit We 1/2 Sample Preparation Trailer 1. QA audit conducted proved sample processing was completed according to schedule but the following are being completed or added: (a) (b) Log of instrument calibration data must be kept up weekly. In-situ van samples must be ball milled and have alpha, gamm, (c) piutonium ard americium performed. | 10% of ground zero and sub-surface samples also need ball milling, gamra, Plutonium and americium run. B. o- (d) All work with dry soil samples should be completed under hoods. (e) Balances in labs should be checked and log results weekly. Chemistry Lab 1. Chemistry lab is following all procedures properly. 2. Procedures need to have final documentation and approval by Dc. 3. Urine samples have been processed to varify procedure has be done on island. Le De Uranium samples have been picked and will be processed by 2/78. Samples flamed for alpha counting must be done in a consistant manner possible usually just one person. C. Count Trailer i. Instrument leg of calibration and backgrounds is up to date. . (But a system must be worked out to store this information on mag tape). is 2. Gamma calibration had been changed, but we are back at the original calibration place. Lb: 3. Windows have been set on licuid scintillation counter to take care of he Backgrounds on alpha spectrometer and gamma spectrometer need to be alpha plutonium 239, americium “41 CUULLALE o taken and recorded weekly.