STATISTICAL PROCEDURES DATE DRAFTED: 27 September 1977 DOE/ERSP PROCEDURE NO. 3 APPROVED: L 6 October 1977 by Paul B. Dunaway (ERSP Manager) Introduction The duties of the Statistician fall into two general categories: Statistical analysis of data related to in situ sampling, and maintenance of a base of sampling, health physics and other data. The Statistician might be expected to extract specific subsets of data from the base, and present them in a particular format. Results of statistical analysis of in situ sampling will be presented in form useful to the DOE Technical Advisor, ERSP Manager, and JTG staff. The Statistician is responsible for estimating average plutonium concentrations using the kriging technique, and for performing required preliminary work such as data verification and covariance structure fits. Concise, accurate, understandable display of results is the Statistician's responsibility, but decisions about actions based on those results are not. The Statistician is also responsible for the accuracy completeness of the data bases, and for assuring the capability to accurately retrieve requested data. and The Statistician will provide the ERSP Manager an informal weekly written report on the status of statistical analyses and data storage. IL, In-Situ Data Procedures (All program file numbers refer to track § of the Enewetak programs tape, all program names to the Enewetak programs disk.) The in situ spectra and the log sheets containing additional information are brought from the sampled island approximately once a week. This data will be put on the in situ data base (tape file 23, IMPDB on disk). The spectrum for each sample point is contained in an integer array of 4096 elements. The first 31 channels* are used for location, date, comments, results, and other information. The remainder are total gamma counts per channel from the pulse height analyzer. The data are transferred to a string for disk storage on 33-record files, one sample per file. No hand input is necessary unless there are additional remarks. The file names indicate the island sampled and a sequence number. Each disk will be labeled (PRINT LABEL) with the absolute coordinates of the reference point**, the detector height, island name, and other information. A hard copy of the label and a catalogue (CAT) of the contents will be stored with each disk. The tape data will be spot-cheeked for accuracy as necessary, and the disk data corrected or updated if errors or changes are found in the tape data. A note of such revisions will be made in the disk label and in the "additional comments" section of each affected file. Specifications for file names and disk labels, exact format of the data array, and examples of data retrieval are in the in situ data base program documentation. After the data have been stored on disks and verified, a duplicate set of disks will be made. This set will be sent back to Las Vegas periodically and the data spectra stored on the big system'there. The disks will then be erased and reused. The storage of tapes and disks on Enewetak will be in separate areas to insure against loss due to fire, ete. *Increased to 35 channels during the project to accommodate entry of additional identifying parameters. **Reference points were not recovered or established on some islands so the disk labels do not all contain absolute coordinates. A-3-1