specific analysis requested and all pertinent information such as: sample weights, raw counting data, sample aliquots, analytical and gamma activity results. All laboratory analysis sheets were filed by island after final reports were submitted to DRI and DOE/ERSP for on-island operational decisions. All raw data sheets, notebooks, and work sheets were sent to DOE/NV for archiving at the close of the project in 1980. Gamma data reports were computed from spectrum channel printouts and an HP-97 desktop calculator during the early phase of the program as only the 241Am photopeak data were required for the transuranies program. Efficiency data tables were computed and stored on the HP-97 magnetic cards and used during data computation. Detector histories in the microfiche list detectors used and efficiencies calculated for each geometry during the cleanup project. Starting in December 1978, after learning that the FPDB program would greatly increase the gamma sample volume, the gamma photopeak data reduction was programmedfor calculation on the HP9831A with printouts of the photopeaks for 241am, 155Eu, 15 Eu, 137s, 60Co, and 49K. No efficiency calculation at photopeak energies other than the above were used or provided. Theseries of specific gamma geometry standards used to calibrate for energy and efficiency are listed in Table 4-5 and Table 4-6. These tables also list the standard solutions used to prepare the various geometry standards. Sample counting geometries are presented in Table 4-7. All gamma spectrum data were transferred directly to the HP9831A program files from the ND-600 PHA LSI-1] using a 1200-baud serial interface. Sample headers were manually entered on the keyboard and then output with the spectra to the cartridge tape files for storage. Samples not analyzed by gamma spectrometry such as FRST nose swipes, other FRST swipes, FRST air filters, EIC RADLABinternal] air filters and swipes were reported to the organization requesting the data and were not included in the data base. All raw reports on these data were later sent to DOE/NV for archiving. Sample data, gamma spectra, and chemistry results were stored on high-speed magnetic tape cartridges in the HP9831A on-island and subsequently transferred to 8-inch floppy dises for transfer to DRI to be put on magnetic tape. Data were added to each sample record where appropriate as the data fields were set up for all possible types of samples. The data records for each sample were set up in three blocks: header, spectrum data and results. 4.4 QUALITY ASSURANCE PROCEDURES A continuous quality control program was implemented for assuring the quality of results reported by the Enewetak Radiological Laboratory. The program consisted of internal quality control checks for precision and accuracy plus external quality control crosscheck programs with various laboratories. The quality assurance program covered the following specific applications: the radioanalytical laboratory performing the analyses, quality control of counting equipment, analytical performance, data handling and reporting. The following information will give a breakdown, details, and tabulation of results for the quality assurance program. 4.4.1 Internal Quality Control - Precision and Accuracy The RADLAB quality control (QC) program had to ensure the accuracy of its analytical results within acceptable limits; this was accomplished by the following steps. The first step was to establish standards which could be used and processed through the laboratory along with samples being analyzed in order to verify the accuracy of the laboratory's analytical results. A sample physically similar to the sample being analyzed but which had very little radioactivity was collected from Enewetak Island and used as a background sample. The Enewetak soil was sieved, homogenized and ballmilled. Several aliquots of the Enewetak soil were analyzed numerous times to determine the concentrations of 238 pu, 239, 240py and 241aAm. This Enewetak soil was processed with each group of samples to determine the sensitivity of the procedure at the lower limit of detection. 13]