FIGURES 1. Rio Puerco Geographical Location
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Grand Canyon Sampling Locations
3. Typical Spectra from Intrinsic Germanium Diode Count of Soil Sample . . . . . . . . . . 4. 230jh Concentration Versus Distance
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5. Rio Puerco Environmental VariaDility Study No. I
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6. Rio Puerco Environmental Variability Study No. 2
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TABLES 1. Representative Analysis of UNC Tailings Pond Solution
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2. 2^6Ra Concentrations Measured in Sealed and Unsealed Samples
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3. Effect of Counting Time on Precision of Sample Analysis
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4. Variability of Short Counts on Individual Samples—1000-Sec Counting Time . , , . . . . , , ,
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5. Radionuclide Concentrations in Grand Canyon Samples—pCi/g ,
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6. Rio Puerco Background Samples
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7. Rio Puerco Samples Having 2^°Th Concentrations >30 pCi/g
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