= Vegetation, other terrestrial biota (350 samples to be processed): Initial processing (LLL) - 116 vegetation samples completed. Seawater (58 samples collected): Chemical separation (LLL) - total of 58 samples; adding carriers and tracers, sequential separation of various elements} in process with a rate of 8 samples per week; 20 samples have had chemistry completed. Plankton (17 samples collected): 17 samples in process (LLL) - dry, weigh, package; samples are ready for gamma counting. Core samples (36 samples collected): Total of 36 collected. In various stages of processing at LLL. These are being sectioned into 5-cm slices, dried, ground, and analyzed. A total of 165 samples will result from 36 cores. Air filters (61 samples collected): High-volume samples gamma counted (LLL) ~ 11 samples. Wet chemical analysis for @39Pu (MCL) - 7 (in process); first data are being reported on the Pu content of these filters. Remainder will be processed as soon as results are in on first batch. Gamma counting, precision Ge(Li) detector spectroscopy: ' Samples counted and data in computer bank (LLL) 23 Feb. '73 9 Mar. '73 23 Mar. '73 Soils 371 ke 686 Sediments 218 223 22k Vegetation 16 16 46 Air filters LL 11 11 802 90h 1277 Fish 186 TOTAL 212 310