Radioactivity in Groundwater in Lahontan Valley, Nevada

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Temporal stability of Uranium and RadonUranium, μg/L, 2001100101UraniumWells sampled in 1989 hadalmost the same uraniumand radon levels whensampled again in 2001.0.10.1 1 10 100Uranium, μg/L, 1989Radon, pCi/L, in 20012500200015001000500Radon00 500 1000 1500 2000 2500Radon, pCi/L, in 1989March 25, 2010
Temporal stability of Polonium-210160140Well CDP-30Estimate from adjusted grossalpha radioactivityPolonium-210, in pCi/L12010080604020Measured 210 Po activityTheoretical decay lineassuming a contaminationevent in the pastTheoretical line assumingsteady-state production of50 pCi/LThe data suggestthe 210 Po has anatural sourceand its levels haveremained stable.01/97 1/98 1/99 1/00 1/01 1/02 1/03 1/04 1/05 1/06 1/07 1/08 1/09Time of SampleMarch 25, 2010
Page 1 and 2: Radioactivity ingroundwater in Laho
Page 3 and 4: Uranium decay series238UT½ = 4.5x1
Page 5 and 6: Uranium levels200010002001-2009 dat
Page 7 and 8: Radon levels100002001 dataRadon con
Page 12 and 13: On-going research• 210 Po usually
Page 14: Conclusion• Could we find 210 Po

Radioactivity in Groundwater in Lahontan Valley, Nevada

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