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Table 1: Equations Used to Develop Soil Screening Levels for the Direct Contact Pathways <br />for a Residential Exposure Scenario <br />(page 3 of 3) <br />Carcinogenic — Mutagenic <br />Incidental ingestion of soil <br />TRxAT, t-Oft x 365d yr <br />S Lres—sol—mu—Ing <br />SF° X EFr x I FSMadi x 1E-6 kg mg <br />where <br />IFSModj— <br />ED0 _2(2years)xIRSc x /0 + ED2_6 (4years)x1RSc x3 + <br />BWc 8Wc <br />ED6 _16 (10years)x IRS° x3 +ED„_„(14years)x1RS,,x1 <br />BW„ BW„ <br />Inhalation of particulates and volatiles <br />SLres—sol—mu—Inh = <br /> <br />TR x A Tc„fc x365d/yr <br />(1000pg )xEF x VF + 1 xET x 1 day ED0_2 (2years)x10+ED2 _6 (4years)x 3 + <br />mg - PEE, 24 hours)x ED6 _16 (10years)x 3 + (14years)x1 <br /> <br />RJR x <br /> <br />Dermal Contact with soil <br />TR x AT, ,arc x 365d/yr <br />SLres—sol—m er SF <br />° x EFr x DFSMaaj x ABSd x1E-6 kg/mg <br />GIABS <br />where <br /> <br />D FS M„i = <br /> <br />ED0 _2 (2years)x SAS, x AFc x10 ± ED2.6 (4years)x SAS, x AF x3 ± <br />BW BWc <br />ED6 _16 (1. 0 years) SAS, x AFa x 3 ± ED16 _30 (l4years)x SAS° x AFa x1 <br />BWa <br />Total <br /> <br />C res—sol—mu—tot = <br /> <br />1 <br /> <br />1 <br /> <br />1 1 <br /> <br />SLres—sol—mu—ing SLres—sol—mu—inh SLres—sol—mu—der <br />13