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Tier 1 Spreadsheet <br /> Table H-3 Exposure Parameter Variables Used in Tables H-1 and H-2. <br /> (page 1 of 2) <br /> Parameters Definitions Units <br /> AT,,,, averaging time for carcinogens years <br /> ATha: averaging time for non-carcinogens years <br /> Bw';', body weight (child,adult,commerciaUmdustrial) kg <br /> C'..t saturated soil concentration* mg/kg <br /> ED ca, exposure duration(child,adult,commercial/industrial) years <br /> EF(sw)c�a exposure frequency to water used for recreation(child, d/yr <br /> adult) <br /> EF.,a, exposure frequency, for all pathways except water used d/year <br /> for recreation (child,adult,commercial/industrial) <br /> ET(sw)c a exposure time to water used for recreation(child,adult) hr/day <br /> ING(gw),a, groundwater ingestion rate(child,adult, Qday <br /> commercial/mdustnal) <br /> ING(sod) soil ingestion rate(child,adult,commercial/industrial) mg/d <br /> ING(sw),,a water ingestion rate during recreation(child,adult) 1/hr <br /> INH(ind air),,, indoor inhalation rate (child,adult,commercial/industrial) <br /> INH(out air)Gar outdoor inhalation rate (child,adult, m3/d <br /> commercial/mdustnal) <br /> LF leaching factor* (chemical-specific) (mg/l)/(mg/kg <br /> M soil to skin adherence factor mg/cm2 <br /> PC skin permeability coefficient for chemicals in water cm/hr <br /> (chemical-specific) <br /> R4Fd dermal relative absorption factor(chem-specific) mg/mg <br /> RAF, oral relative absorption factor(chemical-specific) mg/mg <br /> RfD,nh inhalation chronic reference dose mg/kg-d <br /> ROO oral chronic reference dose mg/kg-d <br /> SF,,,h inhalation slope factor 1l(mg/kg-d) <br /> SF, oral slope factor 1/(mg/kg-d) <br /> SSA(sod)ca, skin surface area exposed to soil (child,adult, cm2 <br /> commercnal/mdustnal) <br /> SSA(total),,, total skin surface area exposed to water used for recreation cm2 <br /> (child,adult) <br /> THQ target hazard quotient unntless <br /> TR target individual excess lifetime cancer nsk unntless <br /> *See Table H-4 for definition <br /> H-17 <br />