RADIOACTIVITY IN PRECIPITATION 545 > 32 280 {2.8 © — 2.8 = 240 en 42424246 UF <= L <~ 200 —— to a Nd* Le — & QO = Ee < = 120 O a bE us x — 4 ont 7 H 4} 160 O—O4 om ro 40 He n= = —_— _ bx—x4 bad OL} | pt | tt 20 840 0 20 8640 2100 <x _ 2.0 = < 5 _ a — UO — a = 6 ° Fan 5 1.2 zs < 7 1.2 « rR a O = — om tu > 7 ei ew HOH 8s ; e 416 2416 & a) rKe ce 2.0 a 710-4 * 40.4 ™_ + ta 0 20 40 0 8-20 40 0 20 2200 2300 ac 9 0000 TIME, CST Fig. 15—Time cross section of total beta concentration (solid lines), rainfall rate (lines with x’s), and ratios of particulate to dissolved beta activity (lines with zeros) for station 5 for storm of May 9, 1964. 3820 TTT TTT 7 = -—- ~ +70 2 280 -}—______, ui h = — | s 240 - < “ 8 200 + > > 160 b Q to Z ~_ wi mo oo = +) bh bow —* — z See OLLI 40 ‘ m < o —7 2.0 et ees 4d LE 40 2000 || 20 tf 40 2 => au fF a s é < eee] 3. 80 Dy n 4 40 2 408 6 120 F- O Ww oc x x > + — z a +450 & 41.0 6 < La << = > 4 | - a 46.0 > 41.2 @ —— Far = ~ 414% 410 peesemense reese 0 60 20 40 2100 60 2200 20 40 rv 4 0.6 0.4 z - & a LL 40.2 0 +o 60 2300 TIME, CST Fig. 16—-Time cross section of total beta concentration (solid lines), rainfall rate (lines with x’s), and ratios of particulate to dissolved beta activity (lines with zeros) for station 6 for storm of May 9, 1964. > U a _ w ~ < 2 < DISSOLVED BETA ACTIVITY ae

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