Table 5. 238 Pu and 239,24 2 Obu concentration factors for aquatic plants in the Great Miami River above and below Miamisburg, Ohio. C.F, H,0'7) zis Cladophora sp, 239,240,| 2 384 239,240,| 238. Sample .F, sea! >? C.F Rip Rap Bridge (gfe? 220—3500 340~—29800 0,58—9,.4 0.16—1.4 0,.8kmS, Chautauqua Bridge (3) 15800—103000 4100—16400 0.65—3,6 >1,1—>3.8 Franklin (3) 14200-53300 1800—7806 2.6—10.3 0.54—2.7 Potamogeton sp. Mad River—Stanley Avenue (3) 0.8kmS,. Chautauqua > 30-70 230—430 >0.17-0.46 0.12-0.23 Bridge (2 ) 5870, 6430 500, 620 0.41, 0.45 0.26, 0.32 Franklin (3) 700—3500 > 90-690 0.36—1.2 0.08—0.45 1000, 1600 106, 270 0.42, 0.73 0.08, 0.22 Myriophyllum sp. Franklin (2) (a our “sed calculated as dry weights of samples and sediments. (db). FP. (c) Table 6. H,0 calculated as wet weight of sample. The number in parentheses indicates the quantity of samples. Activity (pCi/kg dry wt) (2? of 2385 and 239, 2405, in plants from the ponds and canal near Mound Laboratory. 238, Sample 239,240, % Dry/Wet (b) C-F-y 0 2385. (c) C.F. og | Cattails North Pond whole (minus roct) North Canal whole (minus root) (2) North Pond spikes stems North Canal spikes €1s stems roots with sediment South Canal tips stems Grass North Canal plants minus roots (2) Duckweed North Canal (5) South Pond Cladophora North Canal South Canal (a) 11.7 +0.8 <0,33 16,2 5.4 0.06 14,320.9, 59+3 <6.7, 2.1406.4] 12.6, 19,8] 2.8, 7.4 {0.14, 0.62} x16 5.420.5 8.5 40.7 <0.95 0.33 + 0.20 19.5 18.1 3.0 4.4 0.03 0.04 41.7 42.5 not detectable 33.6 380 + 20 not detectable 25.3 6.7 +06.4 30,7 +£1.3 0,41 + 0.20 <0.2 20.4 16.8 5x10°+2x103 (ire eee 65.2+3,.6 2400 + 200 0.3940.29, Knot detectable 32.3 14,0 96,0 1.7 x105 4.5—10.2 600—2900 5,000 + 200 9+9 7.7 400 11,000 + 300 30415 9.1 910 97 ,500 + 900 190 + 40 0.08 x 1079 0.73 x 1073 ~1 (0,09, 0.12) x1073 10.5, 11.2 35 + 8—152 +30] 8,300 + 109 to {53,500 + 600 0.02 11.4 (a) The + value is l o counting error, When the counting error is >100%, the concentration is recorded as <2 0, {b} Calculated on wet weights on sampie. {c} Calculated on dry weights of both sample and sediment. {d) The numberin parentheses indicates the quantity of samples. 3