Laserfiche WebLink
SAFEWAY MEAT PACKING FACILITY, STOCKTON, CALIFORNIA <br /> TIER II RISK BASED CORRECTIVE ACTION <br /> FEBRUARY 26, 1996 <br /> PAGE 4 - 4 <br /> 4.2 Exposure Parameters <br /> Table S presents the exposure factors (i e , characteristics of a person) used in tlus assessment <br /> All of the factors are based on USEPA default values or guidance values Daily inhalation rates <br /> have been adjusted to account for a 8-hour exposure at a work place rather than total daily <br /> inhalation rates as used in the ASTM RBCA standard <br /> 4.3 Physical and Chemical Properties of COIs <br /> Table 6 provides the chemical and physical properties used in calculating the SSTLs and the soil <br /> saturation concentration (C..) The pure chemical water solubility, unztless Henry's Law <br /> t <br /> Constant, air drffuszon coefficient, water diffusion coefficient, and carbon-water sorption <br /> coefficient (Kai} for each COI were taken from the literature when available If a diffusivity <br /> value wasnot available, it was calculated using methods in Lyman, et al (1982) For all COIs, <br /> the soil-water sorption coefficient (K) was estimated from the equation <br /> KS = Ko, * fraction of organic carbon in soil <br /> 44 Volatilization Factors <br /> Tables 7 and 8 present the fate and transport modeling equations and results used to estunate the <br /> volatilization factors Effective diffusion coefficients in soil and water, the soil-to-groundwater <br /> leaclung factor, and soil saturation concentration for each COI were calculated using the equations <br /> in the RBCA protocol (see Table 7) Table 8 provides the volatilization factors <br /> 0131CDJ1 <br />