Analysis of samples is complete for Fortymile north-northeast of the NTS. Preliminary review of the data does Canyon and the Frenchman Flat area. Uncertainties not show definable movement or concentration of plutonium. in the results have not been fully assessed; therefore, this lack of trend is not conclusive. 2. Vegetable and Fruit Sampling Study--Vegetable and fruit samples were collected from 26 locations around the NTS. Analysis for plutonium in the vegetable material collected near the NTS is not complete; however, a 2339p. concentration of 24 pCi/kg wet weight was detected in a sample purchased from a Las Vegas commercial distributor. A second aliquot of ash from that sample yielded 5.9 pCi/kg of 239py. Additional samples have been purchased and are undergoing analysis. FUTURE PLANS Analysis of backlogged samples will continue for soil and air. Few samples will be collected to further define the areal distribution of plutonium in Plutonium analysis soil; however, more special interest sampling is planned. of filters from the 11 air sampling locations reported above will be performed on a routine basis indefinitely. A field study is planned for spring 1976 to sample hummocks created around shrubs by wind erosion. This study will be patterned after the recent on~-NTS sampling performed by Los Alamos Scientific Laboratory (LASL) and Reynolds Electrical and Engineering Co., Inc. (REECo). Two high-volume air samplers and one high-volume cascade impactor sampler will be fielded this spring to augment the routine air sampling network. The data will be used to evaluate the potential for resuspension in the off-site area. Further studies are planned to evaluate the sampling errors involved with soil collection. Additional sampling will be accomplished if necessary. Evaluation of data already generated will continue. Plans include defining what differences may occur between current sample locations. These will be included in the total error. These adjustments will be used in analyzing all the data for trends such as the effect of distance from the NTS and of changing elevation in a drainage basin. A study is under way to evaluate the statistical significance of analyzing 10 grams of soil as compared to analyzing 1 gram of soil. Plans include analyzing 20-gram aliquots to determine if this will significantly decrease the variability of replicate analyses. A report is planned for the joint Environmental Protection Agency/Health and Safety Laboratory soil sampling effort conducted in 1974. Both members have analyzed their samples and a joint review of the data is planned. 229