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Closure Report 29 <br /> Golden Grain Manteca Bean Facility,299 Moffat Boulevard,Manteca,California - July 16, 1996 <br /> ' exposure parameters are based on site-specific conditions and others are standard default <br /> assumptions The sources of the different exposure parameters are indicated on table H-1 <br /> ' 6.3 4 Algorithms for Calculating Exposure Dose <br /> The algorithms for calculating the intake through ingestion, dermal contact, and inhalation are <br /> presented below The values for the different vanables in each algonthm are presented in table H-1 <br /> Ingestion Algorithm <br /> Ingestion Dose a = Cs x IR x EF x ED x CF <br /> 8W x AP <br /> CsXIR, xEFxCF <br /> Ingestion Dose = <br /> AP <br /> where <br /> Ingestion Dose, = adult ingestion dose (mg/kg-day) <br /> Ingestion Dosed, = age-adjusted soil ingestion dose (mg/kg-day) <br /> IRadj = age-adjusted soil ingestion rate (mg-yr/kg-day) <br /> ' Cs = chemical concentration in soil (mg/kg) <br /> IR = ingestion rate (mg/day) <br /> ' EF = exposure frequency (dayslyear) <br /> ED = exposure duration (years) <br /> BW = body weight (kg) <br /> AP = averaging period (period over which exposures are expected to <br /> ' produce an effect) (days) <br /> CF = unit conversion factor(10-6 kg/mg) <br /> ' Inhalation Algorithm For inhalation exposure to sods,the soil-to-air volatilization factor and the <br /> particulate emission factor were calculated according to equations presented in USEPA's Technical <br /> ' Background Document for Soil Screening Guidance (USEPA 1994b) The inhalation algorithms are <br /> as follows <br /> • <br /> ' a2Q2R213 CR <br /> FLUOR DANIEL OT1 1�5_ <br /> 1 <br />