STATISTICAL DESIGN AND ANALYSIS FOR NAEG STUDIES: CURRENT STATUS AND A REVIEW OF PAST EFFORTS R. O. Gilbert and L. L. Eberhardt Battelle, Pacific Northwest Laboratories Richland, Washington ABSTRACT In this paper, we summarize our statistical design and analysis activities for the NAEG since 1971 and report on the current status of our work. The statistical analyses completed during Calendar Year 1977 are discussed and recommendations are made for future cleanup and other studies (see the SUMMARY). A list of references on statistical topics we have studied for the NAEG is also provided and our past synthesis efforts are briefly reviewed. Some specific items discussed in this paper are: (1) a historical review of the design and analysis of field data for estimating Pu spatial distribution and inventory at safety-shot and nuclear test sites on the Nevada Test Site (NTS) and Tonopah Test Range (TTR), (2) maps giving the latest information on spatial pattern of 2397249py, 24lam, and 137¢5 soil concentrations and beta plus gamma GM instrument readings at Nuclear Site (NS)-201, (3) a grid map showing where additional soil samples at NS-201 have been obtained, (4) a grid map for a possible new field FIDLER and soil survey of the Clean Slate 2 site on the TTR to investigate the need for possible cleanup or remedial action at that site, and (5) a grid map showing sampling plans for NS-200 on NTS. INTRODUCTION Statistical design and analysis have played an important role in NAEG ‘environmental transuranic studies on NTS and TTR since the first studies began in 1971. In this paper, we give a historical review of our involvement as statisticians in these studies up to the present time. This review includes a discussion of our activities since the last NAEG Pu Information Conference in March, 1977. We also take this opportunity 451