Laserfiche WebLink
Vapor Transport From Groundwater <br /> • <br /> where <br /> E = total mass flux of the chemical constituent entering the <br /> building[g/s] <br /> A = cross-sectional area of the foundation(perpendicular to <br /> the vapor flux) [cm2] <br /> F = volatile emission rate of the chemical constituent being <br /> modeled(defined in Equation A-1)(g/cm2/s] <br /> The concentration of contaminant in the building, Carag(g/cm3), is estimated by <br /> E m' 186400s} <br /> C — Q /I (E-6) <br /> "'�O' , IE6cm3 d <br /> where <br /> C,,, concentration of contaminant in building air[g/cm3] <br /> E = volatile emission rate of the chemical constituent being <br /> modeled [g/s] <br /> • QB = building ventilation rate(calculated from the number of <br /> air exchanges per day and the volume of the building) <br /> [m3/d] <br /> The building ventilation rate, QB, is calculated from the user input variables the define <br /> the volume of the building and the air exchange rate Equation E-6 assumes that the <br /> entire flux of contaminant at the exterior of the building is pulled into the building and <br /> there is no reduction of the concentration (due to presence of concrete, etc) It is also <br /> assumed that the air in the building is well mixed (including the basement air if a <br /> basement is present) <br /> ESQ <br /> REQ.U�.,.I..RE�.�M...ENT�S,-....=�, a .. �. � <br /> _e9s <br /> The data requirements for the groundwater vapor transport model are shown in Table <br /> E-1 Note, the dissolved phase concentrations in the groundwater source are only <br /> E-7 <br />