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r <br /> RISKPRO IS SESOIL for Windows User's Guide <br /> The soil column in SESOIL is a user-defined compartment extending from the surface through <br /> the unsaturated zone to the groundwater table Typically, SESOIL is used to estimate the rate ' <br /> of migration of chemicals through sods,and the concentration of the chemical in soil layers <br /> following chemical release to the soil environment SESOIL's simulation of chemical I <br /> persistence considers mobility, volatility, and degradation. The model performs calculations on <br /> an annual or monthly bans, and can simulate up to 9999 years of chemical transport. <br /> The model requires several types of chemical- and site-specific data to estimate the concentration <br /> of the chemical in the soil,-its rate of leaching toward groundwater, and the impact of other <br /> environmental pathways. The user is required to provide chemical properties and release rates, I <br /> and soil and climate data. This user's guide is designed to provide users of SESOIL with the <br /> information-needed-to-efficiently-and-appropnately-run-the-model-and-interpret-the-results. <br /> F r <br /> _ �. .._ W i" err ' ' � • _ <br /> I <br /> Page 4 <br />