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TABLE B-4.AREA 2B, INHALATION EXPOSURE PATHWAY EVALUATION <br /> RESIDENTIAL SCENARIO <br /> SOUTH SHORE PARCELS <br /> CITY OF STOCKTON HOUSING AND REDEVELOPMENT AGENCY <br /> STOCKTON,CALIFORNIA <br /> Ethyl- n-Butyl sec-Butyl Isopropyl- n-Propyl All Chemicals <br /> Acronym Value Benzene Toluene benzene Xylenes benzene benzene benzene benzene PCE of Concern <br /> Exposure Parameters: <br /> Groundwater Concentration C,4 mg/L Chem-Spec ND 3-20E-03 8-00E-04 4.00E-03 -- - - -- - - <br /> Indoor Air Concentration C, m9/m3 Cbem-Spec 2.64E-07 1.99E-09 1.02E-08 - - - - - - <br /> Inhalation Rate-Child Ch IF, mi/day 15 - - - - - - -- - - <br /> Inhalation Rate-Adult Ad IR, m3/day 20 -- -- - <br /> Exposure Frequency-Child Ch EF days/year 350 -- - - - <br /> Exposure Frequency-Adult Ad EF days/year 350 - - - <br /> Exposure Duration-Child Ch ED years 6 -- — - - -- - <br /> Exposure Duration-Adult Ad ED years 24 - - - - - -- - - <br /> Body Weight-Child Ch BW kg 15 - - - - -- - - <br /> Body Weight-Adult Ad BW kg 70 - - - - -- - <br /> Averaging Time-Noncarcinogenic-Child Ch At„, days 2190 - - - - -- - <br /> Averaging Time-Noncarcinogenic-Adult Ad At„ days 8760 - - - -- - - <br /> Averaging Time-Carcinogenic At„ days 25550 - - - - - -- -- - <br /> Chronic Daily Intakes: <br /> Noncarcinogenic-Child Ch CDI„ mg/kg-day Chem-Spec 2.53E-07 1.91H-09 9.75E-09 - - -- -- <br /> Nonearcinogenic-Adult Ad CDI_ mg/kg-day Chem-Spec - 7.24E-08 5.44E-10 2.79E-09 - — -- — <br /> Carcinogenic-Child ChCDIc mg/kg-day Chem-Spec - -- - - - - -- - - <br /> Carcinogenic-Adult AdCDlc mg/kg-day Chcm-Spec - <br /> Carcinogenic Resident ResCD4 mg/kg-day Chem-Spec - - — -- - <br /> Toxicity Criteria: - <br /> Verified Reference Dose RfD mg/kg-day Chem-Spec 1.70E-03 1.10E-01 2.90E-01 2.00E-01 1.00E-02 I.00E-02 1.10E-01 1.00E-02 1.10E-01 -- <br /> Cancer Slope Factor-IHL CSF-Inh (mg/kg-day)-€ Chem-Spec 1.00E-01 NC NC NC NC NC NC NC 2.10E-02 -- <br /> Noncarcinogenic Hazards: <br /> Hazard Quotients-Child Ch HQ unitless Chem-Spec 2.30E-06 6.57E-09 4.88E-08 - -- - 2.36E-06 <br /> Hazard Index-Child Ch HI unitless -- __ __ __ _- -- -- 2.36E-06 <br /> Hazard Quotients-Adult Ad HQ unitless Chem-Spec - 6.58E-07 1.88E-09 1.39E-08 - -- - 6.74E-07 <br /> Hazard Index-Adult Ad HI unitless -- - - - - -- - 6.74E-07 <br /> Carcinogenic Risks: <br /> Risk-Child Risk-Ch unitless Chem-Spec - - -- -- - - -- -- UOE+DO <br /> Risk-Adult Risk-Ad unitless Chem-Spec - - - - - - -- 0.00E+00 <br /> Risk-Resident Risk-Res unitless -- - - - - - - -- 0.00E+0fl <br /> I <br /> 1 Isopropyl benzene used as surrogate for verified reference dose. <br /> Indoor air concentration calculated by multiplying volatilization factor by chemical concentration in groundwater. <br /> NC Not considered to be carcinogenic via inhalation exposures. <br /> Chem-Spec Chemical-specific parameter value. <br /> kg Kilograms. <br /> m3/day Cubic meters per day. <br /> 3 <br /> mg/m Milligrams per cubic meter. <br /> mg/kg-day Milligrams per kilogram-day. <br /> (mg/kg-day)-Reciprocal milligrams per kilogram-day. <br /> SOMA 99-2218 Page t of 1 €2110199 <br />