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TABLE 7 <br /> RECEPTOR EXPOSURE PARAMETERS <br /> I SURLAND HOMES—BRIDLE CREEK <br /> Tracy,San Joaquin County California <br /> Resident Resident Construction <br /> Pathway Parameter Adult Child Worker <br /> IR-Inhalation Rate(m3/day) 20 10 20 <br /> EF-Exposure Frequency(days/year) 350 350 250 <br /> Inhalation of Particulates/VOCsED-Exposure Duration(years) 24 6 1 <br /> BW-Body Weight(kg) 70 15 70 <br /> IAT-Averaging Time,Carcinogen(years) 70 1 70 70 <br /> AT-Averaging Time,Noncarcinogen(years) NAS 6 1 <br /> IR-Ingestion Rate(mg/day) 100 200 330 <br /> IEF-Exposure Frequency outdoors(days/year) 350 350 250 <br /> Ingestion of Soil <br /> ED-Exposure Duration(years) 24 6 l <br /> 1 BW-Body Weight(kg) 70 15 70 <br /> AT-Averaging Time,Carcinogen(years) 70 70 70 <br /> AT-Averaging Time,Noncarcinogen(years) NAI 6 1 <br /> ' SA-Surface Area(cm 2/d) 5,800 2,000 5,700 <br /> ABS-Absorption Coefficient CS CS CS <br /> AF-Adherence Factor(mg/cm2) 1 1 0.8 <br /> I Dermal Contact with Soil ED-Exposure Duration(years) 24 6 1 <br /> EF-Exposure Frequency outdoors(days/year) 100 350 250 <br /> BW-Body Weight(kg) 70 15 70 <br /> AT-Averaging Time,Carcinogen(years) 70 70 70 <br /> AT-Averaging Time,Noncarcinogen(years) NAI 6 1 <br /> ' Abbreviations: <br /> Cal/EPA=California Environmental Protection Agency <br /> cm2/d=Square centimeters per day <br /> 1 CS=Compound Specific <br /> days/year=Days per year <br /> DTSC=CaUEPA Department of Toxic Substances Control <br /> NA=Not applicable <br /> kg=Kilograms <br /> m'=Cubic meters <br /> mg/cm2=Milligrams per square centimeter <br /> 1 mg/day=Milligrams per day <br /> PEA=Preliminary Endangerment Assessment <br /> VOCs=Volatile organic compounds <br /> ' Note: <br /> Hazards are only calculated for resident child. <br /> Source: <br /> ' PEA Guidance Manual(CalEPA DTSC,June 1999). <br /> Page l of 1 <br /> SAIF <br /> 1 <br />