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i <br /> TABLE E-3. INDOOR AIR SCREENING LEVELS <br /> (volatile chemicals only) <br /> Health Based Screening Levels 50%Odor <br /> Unit Risk Reference Residentlal Exposure Commercralllndustrial Exposure Recognition <br /> Factor Concentration Lowest Indoor Air IndoorAir Lowest IndoorA r indoor Air Threshold <br /> Physical URF RfC Residential (carcinogens) (noncercinogens) Cil (carcinogens) <br /> CHEM]CAL PARAMETER State (uglm')i (uglm') (u lm' (ugm) � g } (noncarcinogens)ogens) (Table H-2} <br /> I g } ( g ) (ugtm) (uglm} (ugfm) (ugfm} (uglm} <br /> INYL CHLORIDE V G 7 7E-05 1 0E+02 3 2E-02 3 2E-02 2 1 E+01 5 3E-02 5 3E-02 2 9E+01 7 71 E+05 <br /> YLENES V L 7 OE+p2 1 5E+02 1 5E+02 2 0E+02 2 0E+02 4 41E+02 <br /> ZINC NVI 5 <br /> Red >25%change in comparison to July 2003 ESIL Ettfamol a bed to ebruary 2005 ESLs <br /> Notes <br /> 1 "Residentiar screening levels generally considered adequate for other sensitive uses(e g day care centers hospitals etc) <br /> Target cancer risk=1 E-06 Target Hazard Quotient=0 2 for all chemicals except TPH(HQ of 0 5 used,see Sections 13 and 3 4 of text) <br /> Physical stale of chemical a1 ambient conditions(V-volatile,NV-nonvolaille,S-solid,L-liquid,G gas) <br /> Chemical considered to be"volatile if Henry's number(aim on3lmole)>0 00001 and molecular weight X200(sea Table E 1) <br /> Dibromochloromethane,dibromochloropropane and pyrene considered volatile for purposes of modeling(USEPA 2004) <br /> Calculated based on spreadhseet provided with User's Gude forthe Johnson and Ettinger Indoor-Air model(1947)for Subsurface Vapor intrusion Into Buildings(USEPA 2003)using <br /> default input parameter values noted in Appendix 4(see text for equations) <br /> Indoor air screening levels listed only for volatile chemicals included in database of referenced model spreadsheet(plus MTBE) <br /> URFs from Cal EPA OHS(Cal EPA 2001)where available(marked by" ')or otherwise as presented in referenced spreadhseet(USEPA 2000) RfCs presented in spreadsheet or added as indicated in Appendix 4(refer <br /> to footnotes to VLOOKUP worksheet) <br /> URF for TSA based on conversion of CSF presented in Table J <br /> Indoor air screening level for ethanol based on potential odor concerns(refer to Section 5 3 3 and Table H series) <br /> 507 Odor Recognition Thresholds from Massachusetts Department of Environmental Protection(MADEP 11394)and ATSOR included for reference(potential nuisance concerns,see Table H senes) <br /> I <br /> INTERIM FINAL-February 2005 <br /> SF Bay RWQCB Page 4 of 4 Table E-3(Indoor Air Goals) <br />