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RESRAD-BIOTA does report the external dose rate from sediment (Levels 2 and 3). The ERICA Tool reorts reports a combined external dose rate. However, you can determine the external dose rate from sediment in the ERICA Tool. To do this enter the water activity concentrations as 0. If you do this the (assuming you do not enter reference organism activity concentrations) the this the reported dose rates will be the external dose rate from exposure to sediment only. Similarly if you want to estimate the dose rate from water only, enter the sediment activity concentration as 0.

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