SAMPLING AT NUCLEAR TEST SITES The initiation of environmental sampling porgrams at nuclear event sites on the NTS must begin, as always, with precisely written statements of the objectives for sampling. It might be helpful to have written copies of these objectives sent to all participating scientists so that decisions made during the course of these studies will not be in conflict with established objectives. Some guidance relative to the level of precision desired in estimated quantities should be given to permit the selection of adequate numbers of samples and appropriate survey and laboratory measurement techniques. Stratified random sampling is expected to be useful at the nuclear sites in estimating total amounts of contaminates present, although a field survey instrument other than the FIDLER will, be required to define strata. The usefulness of (1) it is presumed, double sampling to estimate total amounts at these sites and (2) whether any of the modifications in sampling plans suggested above for the safety-shot sites might be useful in these new areas, needs to be evaluated. A thorough study of maps, surveys, and other data available on these nuclear sites well in advance of actual field sampling should result in better sampling plans in terms of obtaining more information for a fixed cost. Consultations between NAEG personnel and those familiar with field activities at the test sites since the time of detonation is strongly encouraged. It is also necessary to become familiar with the kinds of survey and laboratory analytical equipment appropriate for these sites. Consideration should be given to the adequacy of the present NAEG data bank system relative to the needs associated with sampling at nuclear sites. Since modifications may be required, someone familiar with the system should be involved in planning sessions where sampling designs are discussed. Consideration should be given toward modifica- tions to the data bank that will permit greater interaction between the scientist and the data. 109 yo"