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Table 3: Equations Used to Develop Soil Screening Levels for the Direct Contact Pathways <br />for a Utility Trench Worker or Construction Exposure Scenario <br />Carcinogenic — Utility Trench Worker (ut) A _ <br />Incidental ingestion of soil <br />TR x AT,. ,...arc x 365d/yrxEIWut <br />S Lut—sol—ca—ing — <br />SF0 X EFut x E Dot x IRSot x1E-6kg/mg <br />Inhalation of particulates and volatiles <br />TR x ATcatc x 365d/yr <br />SLut—sol—ca—inh — <br />Dermal Contact with soil <br />EF x <br />t <br />x AL ,arc <br />1 VF x ED ut x ET x t <br />( \ 1 day <br />IUR 41000 lug)x <br />mg <br />TR <br />, + <br />u• PEF„ <br />x365cryrxi31/1./ut <br />24 hours \, ,/ <br />SLut—sol—co—der — SF x x SAS,,xAc x ABSa x 1E-6 kg ' mg <br />1 <br />E F EDut <br />GIA BS <br />ut x <br />Total <br />Cut-soi-ca-tot = 1 1 1 <br />+- + <br />SLut—sol—ca—ing SLut—sol—co—inh SLut—sol—co—cler <br />_ Noncarcinogenic — Utility Trench Worke . <br />Incidental ingestion of soil <br />THQx BIA/ot x AToo x EDot x 365d/yr <br />C ut-sol-nc-ing = <br />EFut x EDut <br />Inhalation of particulates and <br />1 —6kg <br />x <br />1E x x IRS, <br />RfDo mg <br />volatiles <br />THQx ATn, x ED, x365c1/yr <br />Cut-soi.mh — <br />EF„ x ED, <br />Dermal contact with soil <br />1day 1 1 ET„ x x x (VF„t + <br />24hours RiC PEFut <br /> ) <br />THQx BINut x ATuc x EDut x 365d/yr <br />Cut-sol-nc-der <br />E F„ x ED„ <br />Total <br />1 x SAS, x A Fot x 1E —6kg x x , <br />(RfDo x GABS) <br />1 <br />ABSd <br />mg <br />C ut—sol—nc—tot = 1 1 1 <br />+ + <br />Skt—sol—nc—ing SLut—sol—nc—inh Skt—so!—nc—der <br />15