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• <br /> Saturated Soil Model <br /> kL-DESCRIPTON <br /> The saturated soil model in RISC simulates dissolved chemical transport from a soil <br /> source zone at or near the water table The source's position, relative to the aquifer, <br /> may change during the year due to groundwater table fluctuations Thus, it may be <br /> located entirely within the aquifer during part of the year, and located partially above <br /> the aquifer during the rest of the year The location relative to the water table is <br /> important as the two different processes of rainwater infiltration and groundwater flow <br /> • through the source are necessary to introduce contamination into the aquifer The <br /> source term in this model is specified with a total soil concentration(mg/kg) whereas <br /> the source in the dissolved phase groundwater model (Appendix B) is specified as a <br /> dissolved phase concentration(mg/l) <br /> This is a compartmental model, consisting of a source zone leaching model and a <br /> dissolved chemical groundwater transport model The groundwater transport model is <br /> identical to the model described in Appendix B This appendix focuses on presenting <br /> the source leaching model Similar to the dissolved phase groundwater model, the <br /> saturated source model can be used (i)to predict the concentration in groundwater at a <br /> "receptor well", or, (n) to predict the concentration in groundwater as a source for <br /> volatile emissions into a building (see Appendix E) The saturated soil model is not <br /> linked with a vadose zone model <br /> In the saturated source model the source concentration is defined as a total <br /> soil concentration This sod concentration may be above the residual limit In <br /> the dissolved phase transport model (Appendix B), the input concentration <br /> must be a dissolved phase concentration <br /> i <br /> tr-1 <br />