43 Table 4. Radionuclides Concentrations of tranuranium radionuclides in Halimeda Algae and Cactus Crater. Halimeda monile* 24lam (pCi/g dry wt) 2.53 + 0.30 239424 0py (pCi/eg dry wt) 44 18.68 4 0.033 Crater sediment Table 5, Crater Water 9.2 + 2.0 82 + 2 238py, 239+240p, 0.54 + 0.03 0.54 + 0,02 24lam, 2394240p, 0.14 + 0.02 0.11 40.02 Plutonium concentrations in the water column at Enewetak Atoll. 116 + 62 fCci/li 0.53% 0.02 December 1972 July 1974 April 1976 39 35 6 4l 16 12, 28 0.12 0.13 0.13 __ 0.29 0.57 ee 1.70 1.54 0.27 1.81 0 0.53 1.24 Solubte OG? Q,29 Particulate 0.68 0.) 0,73 O. 71 0.50 Mean concentrations in lagoon water (fFCi/1) Soluble (< 1 um) Particulate (> ] um) Total Mean ?38pqy, 2890 240py Water 24lam (Halimeda: sediment)+ 0.28 239+2450py (Halimeda: sediment) 0.23 Concentration factor for 239+240py x Wet wt: dry wt = = Sampling time column inventory (mCi/km*) 7.5 x .10" @Ci/kg wet wt per pCi/ke H20.) Soluble Particulate Total 1,84 - 1.65 1,94 0.76 1.33 2.13. Taverage concentration in 8 water samples from Lhe crater bottom collected between 1974 and 1977, * oCi/e dry wt Halimeda + pCi/g dry wt sediment. Lageon Inventory (Ci) Soluble Particulate Total Water Inventory ~- % of Sediment Inventory Water Inventory compared to top 2,5 cm of sediment surface (%) inventory Total Water Inventory Compared to top 16 cm of sediment (%) inventory Soluble Particulate ; Total 0.14 0.13 0.056 0.023 O.15 0.045 O.10