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TABLE 7 <br /> ' RECEPTOR EXPOSURE PARAMETERS <br /> SURLAND HOMES—BRIDLE CREEK <br /> Tracy, 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 /> ' <br /> Inhalation of Particulates/VOCs ED-Exposure Duration(years) 24 6 1 <br /> BW-Body Weight(kg) 70 15 70 <br /> AT-Averaging Time, Carcinogen(years) 70 70 70 <br /> ' AT-Averaging Time,Noncarcinogen(years) NAS 6 1 <br /> lR-Ingestion Rate(mg/day) 100 200 330 <br /> EF-Exposure Frequency outdoors(days/year) 350 350 250 <br /> ' Ingestion of Soil ED-Exposure Duration (years) 24 6 1 <br /> BW-Body Weight(kg) 70 15 70 <br /> ' AT-Averaging Time,Carcinogen(years) 70 70 70 <br /> AT-Averaging Time, Noncarcinogen (years) NA' 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(mglcm2) 1 1 0.8 <br /> 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) NA1 6 1 <br /> ' Abbreviations: <br /> Cal/EPA=California Environmental Protection Agency <br /> cm =Square centimeters <br /> CS=Compound Specific <br /> ' d=Diameter <br /> DTSC=Cal/EPA Department of Toxic Substances Control <br /> NA=Not Applicable <br /> ' kg=Kilograms <br /> in =Cubic meters <br /> mg=Milligrams <br /> PEA=Preliminary Endangerment Assessment <br /> ' VOCs=VoIatile organic compounds <br /> Note: <br /> Hazards are only calculated for resident child. <br /> Source: <br /> PEA Guidance Manual(CaIEPA DTSC,June 1999). <br /> 1 <br /> ' ::: <br /> Page 1 of 1 From Science to Solutions <br />