A formal data transmittal could include tabular information, maps of estimates, charts, graphs and accompanying explanatory tests. Information was frequently exchanged informally to avoid time delays, and followup formal transmittals sent when appropriate. Displays of data suitable for use in briefing project management were also maintained. Grid maps with data written in, aerial photographs, viewgraphs, overlay maps and similar materials were used for this purpose. For transmitting data internally, for example, between statisticians during personnel changeovers, several methods were used. Plots of the raw variograms and models (see Section 5.3) were kept in a notebook, along with estimation results and the input parameter required by the data analysis programs. Subsurface data were displayed in several different forms, including maps showing each depth individually, multidepth data maps, and overlay maps. Field notes, daily logs and notes on computations and statistical methods were kept to document the reasoning behind the methods chosen for analysis. Program documentation, particularly on program updates, and current catalogs of the contents of magnetic disks and cartridge tapes were also maintained. 5.4 DATA BASES There are several data bases containing data related to the cleanup project, two of which are extracts from two larger bases. The purpose of these data bases is to provide long-term capability to retrieve the data easily, and to documentthe initial and final condition of the islands of Enewetak Atoll, The smaller data bases contain the most commonly used data, which can be retrieved very rapidly. The larger data bases contain the complete gamma spectra, detailed identifying information, and pertinent comments. Results from alpha or beta spectroscopy are also included on the laboratory data base. The larger data bases are suitable for more detailed studies since data for gamma-emitting isotopes besides those considered during the cleanup can be extracted from the stored spectra. One of the large data bases contains all of the spectra from in situ measurements taken with the IMP, including calibrations and the preliminary data taken to check out the system. Identifying information includes island, stake location, date and time of the measurement, serial number of the detector used, percent brush cover, file number of the disk file containing the spectrum, and comments. There are two tape copies and a flexible disk copy of the entire data base. The other large data base contains the gamma spectra and alpha and beta spectroscopy results for laboratory data. Identifying information includes island, stake or other location identification, date and time of sample collection, type of sample, depth of sample, counting date and time, detector geometry and number, and, where pertinent, name and organization of sample collector. Extracted gamma results are stored for all isotopes for which a current calibration was available. The spectra are stored in six subsets according to type of sample: Surface, subsurface, fission products, special projects, miscellaneous, and non-soil. The miscellaneous subset contains spectra which appear to be from no particular location on an island or have no depth indicator. The non-soil subset includes the calibration spectra as well as non-soil samples. Within each subset, the spectra are stored in order by EIC laboratory number. There are two tape copies of each subset of spectra and a disk copy of the data base, although the gamma results are not stored on disk. The compact IMP data base was extracted from the in situ data base. It contains stake locations, date of measurement, percent brush, a code for whether the data is pre- or postcleanup, the extracted 24lam, 1555u, 1375, and 60Co data with estimated standard deviations, and a factor which includes all the corrections that were applied to the 241m data. For noncleanupislands, the pre-post code is replaced by an island code. This data base is on flexible disk and tape. The Fission Product Data Base (FPDB) contains information extracted from part of the laboratory data base. It contains island and stake location, sample depth, collection date, EIC lab number and extracted gamma data for isotopes that are important in dose assessment. The results of those samples which were analyzed for 99Sr, 24lam, 239:240pu, and/or 241Pu, are also stored. The data are stored in the order in which the samples were analyzed, but tagsorted files exist which allow the data to be retrieved by location within an island. The FPDB exists on disk and tape. 151