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RISC Manual Version 4 0 <br /> • <br /> Table H-3. Exposure Parameter Variables Used in Tables H-1 and H-2 <br /> (page 2 of 2) <br /> Parameters Definitions Units <br /> VFu volatilization factor from surficial sods to (mg/m3)/(mg/kg) <br /> outdoor air(vapors) * (chemical-specific) <br /> VFp volatilization factor from surficial soils to (mg/m3)/(mg/kg) <br /> outdoor air(particulates)* (chemical- <br /> specific) <br /> chemical- <br /> specifc) <br /> VF.,.b volatilization factor from subsurface soils to (mg/m3)/(mg/kg) <br /> outdoor air* (chemical-specific) <br /> VF.v volatilization factor from subsurface soils to (mg/m3)/(mg/kg) <br /> indoor air* (chemical-specific) <br /> VF..,p volatilization factor from groundwater to (mg/m3)/(mg/1) <br /> indoor air* (chemical-specific) <br /> VF,,,,,,,,,b volatilization factor from groundwater to (mg/m3)/(mg/l) <br /> outdoor air* (chemical-specific) <br /> *See Table H-4 for definition <br /> • <br /> • <br /> H-18 <br />