Real-time Radiological Analyses of Transuranic Soil Cores Scope: • Tank W-1A at Oak Ridge National Laboratory (ORNL) collected wastes from three high-radiation- level analytical facilities between 1951 and 1986. A groundwater contamination plume containing Cs-137, transuranics, uranium, and other isotopes emanated from contaminated soil surrounding the tank. URSiCH2M Hill Oak Ridge (UCOR) was the DOE environmental management contractor. • Sampling and radiological analysis of subsurface soils to determine the extent and depth of the contamination and to estimate the volume of transuranic soil to be excavated. Key Drivers: • Quantify transuranic components in the presence of high Cs-137. • Maintain Am-241 Minimum Detectable Activity (MDA) < 10 nCi/g for all

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