complexes will have an effect on those mechanisms. Some effort should be directed toward complete chemical analyses, including organic matter, of some soils to determine possible relationships. The organic matter within a mound is of immediate importance in that respect. Dr. Tamura (ORNL) has performed particle sizing on some samples and determined the plutonium concentration associated with the various sized fractions. This information will be of value for profile and mound studies. However, from the standpoint of hazard evaluation, the NAEG resuspension study personnel need specific data relative to plutonium concentration in the respirable fraction, i.e., that fraction about 4 um or less in size. Further investigations related to that need should be initiated. There are microplot data which should be assembled and summarized in a final report. We would recommend that a person or persons be assigned that task and the necessary data supplied to them. A considerable volume of FIDLER data exists. synthesize the data into a report. An attempt should be made to We have no knowledge of its true value; however, an effort should be made to evaluate the data. data, a person or persons should be assigned this task. As with the microplot With respect to inventory, there were questions as to whether mound samples were collected at random since the number of mound samples is exceedingly small when compared to the number of desert pavement samples. Field data notes are inadequate on this subject. The data should be reviewed in light of the known mound to desert pavement ratio; mound data should also be reviewed to determine any possible bias which might result if a disparity exists between numbers of mounds sampled and numbers which should have been sampled. As has been pointed out previously, concentrations of plutonium calculated from 21am data often show a disparity with data obtained for plutonium concentrations determined by radiochemical analysis. If funds are available, it is recommended that radiochemical analyses be performed on Mound Study #1 samples for 2397240py as well as 24%14m on the low activity samples to confirm the Ge(Li) scans and to obtain direct data for 239°24 py to 241Am ratios. It would be desirable to determine the absolute concentration of *4!Pu so that future **!am concentrations can be projected and so that the absolute relation- ship between 2!Pu and 24am can be determined. A procedure for the determination of low levels of uranium has been developed recently. We recommend a meeting of analysts who will be involved for the purpose of reviewing the procedure and designing a testing program commensurate with possible NAEG requirements. Interim Report As the effort at the safety shot sites nears completion and NAEG prepares to move into the nuclear sites, it becomes increasingly apparent that synthesized interim reports collating and coordinating those data available should be prepared. The reports should review past NAEG field studies and contain reduced data from each study. Every attempt should be made to interrelate needs and results from each study and thus define "gaps" where further work is indicated. Possible errors in technique and/or philosophy should be examined and alternate recommendations made to provide a guide for further studies. 33