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.a0 Vudose Zone Som <br /> For the case of vadose zone sources (see Figure 4), the DAF can be calculated from <br /> IDAF= 1 <br /> (5.l) <br /> APs�G+�v <br /> where: <br /> 4 = time-averaged water infiltration rate per unit area[sold] <br /> UG, = groundwater seepage velocity [m/d] <br /> k = &quifer porosity [L-voids&-soill <br /> <SL*> = maximum-tune-averaged and nom source zone leachate <br /> concentration [mgALmo] -Graph 5 <br /> = attenuation factor for centerlme concrenumdons at the groundwater <br /> 10 table [umtless] - Graph 6 <br /> = attenuation f=or cordon tem accounting for vertical averaging <br /> [witless] -Graph 7 <br /> 4> = attenuation factor for longitudinal dispersion and chermccall reactions <br /> [unitless] -Graph 8 <br /> V = attenuation factor for vadose zone transport [uniticss] - Graph 9 <br />