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RISKPRO'S SESOIL for Windows User's Guide <br />' of the pollutant front has reached the top of that layer (sublayer) When the pollutant depth <br /> reaches the groundwater table, the pollutant leaves the unsaturated zone simply by multiplying <br /> the groundwater runoff (recharge) rate by the concentration in the soil moisture. <br />' Table 3.2 Pollutant Loading Characteristics in SESOIL <br />' LOADING TYPE OF POLLUTANT LOADING INITIAL <br /> CHARACTERISTICS CONCENTRATION <br /> Instantaneous Continuous <br />' Location 1st sublayer (layer) Any 1st sublayer of the Any sublayer of the four <br /> only four major layers major layers <br />' In the first time steps Evenly distributed for In the first time step of <br /> Total Pollutant Mass of the month each time step during the month <br /> the month <br />' Depth of 1st Layer From ground surface (0) <br /> Middle of the lowest <br /> Pollutant front <br /> begins 2,3,4 NA* Middle of the lowest sublayers <br /> Layers I sublayers <br /> t Time step of one day in SESOIL <br />' $ Not Applied <br /> NOTE. The units that SESOIL requires for the initial concentrations are in ug/ml or <br />' uglcm3 Normally, the measured adsorbed concentrations are in uglg. Thus, a <br /> conversion for the concentrations from uglg to uglml is needed. To do this, <br /> simply multiply the adsorbed concentrations by the soil density in glcm3 to obtain <br />' the concentrations in ug/ml <br /> I <br />' Page 23 <br /> I <br />