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■r r r r r r rr rr m Ism r r r r r r 4 r RBCA TIER I INPUT DATA Table II 7 Site Name Exxon 7-0137 Software GSI RSCA Spreadsheet Site Location Stockton CA Date Completed 8122100 Version f 0 1 Completed By JCI NOTE values which difler from Tier 1 default values are shown in bold italics and underlined Exposure Residential Commerciallindustrial Surface Parameter Definition Units Adult 1-0 rs F1 J6VrsJ Chronic Constrctn Parameters Definition(Units) Residential Constrctn__ ATc Averaging time for carcinogens(yr) 70 A Contaminated soil area(cm12) 2 2E+06 1 OE+06 ATn Averaging time for non carcinogens tyr) 30 6 16 25 1 W Length of affect soil paralSel to wind(cm) 1 5E+03 1 0E+03 BW Body Weight(kg) 70 15 35 70 W gw Length of affect soil parallel to groundwater(cmc 1 5E+03 ED Exposure Duration(yr) 30 6 16 25 1 Uair Ambient air velocity in mixing zone(critls) 2 3E+02 I Averaging ttme for vapor Flux(yr) 30 25 1 delta Air mixing zone height(cm) 2 OE+02 EF Exposure Frequency(dayslyr) 350 250 180 Lss Thickness of affected surface soils(cm) 1 0E+02 EF Derm Exposure Frequency for dermal exposure 350 250 Pe Particulate areal emission rate(glcmA2ls) 69E 14 IRgw Ingestion Rate of Water(Llday) 2 1 IRs Ingestion Rate of Soil(mglday) 100 200 50 100 IRadl Adjusted soil ing rate(mg yr/kg-d) 1 1E+02 9 4E+01 Groundwater Definition Units Value IRa in Inhalation rate indoor(mA31day) 15 20 delta gw Groundwater mixing zone depth(cm) 2 OE+02 Ra out Inhalation rate outdoor(mA31day) 20 20 10 1 Groundwater infiltration rate(cmryr) 3 OE+01 SA Skin surface area(dermal)(cmA2) 5 BE+03 2 OE+03 5 8E+03 5 8E+03 Ugw Groundwater Darcy velocity(c nlyr) 2 5E+03 SAadj Adjusted dermal area(GmA2 yrlkg) 2 1E+03 1 7E+03 Ugw IT Groundwater seepage velocity(crrdyr) 6 6E+03 M Soil to Skin adherence tactor I Ks Saturated hydraulic conduchwty(cmis) AAFs Age adjustment on sod ingestion FALSE FALSE grad Groundwater gradient(emlcm) AAFd Age adjustment on skin surface area FALSE FALSE Sw Width of groundwater source zone(cm) 3 OE+03 lox Use EPA lox data for air(or PEL based)? TRUE Sd Depth of groundwater source zone(cm) 1 5E+02 gwMCL? Use MCL as exposure limit in groundwater? FALSE Phi eff Effective porosity in water bearing unit 3 BE-0f foc sat Fraction organic carbon in water bearing unit 1 OE 03 BIO? Is bioatlenuation considered? FALSE BC Biodegradation Capacity(mg1L) Matrix of Exposed Persons to Residential Commercialllndustriai Complete Exposure Pathways Chronic Constrctn Soil Definition Units Value Outdoor Air Pathways he Capillary zone thickness(cm) 5 DE+00 SS v Volatiles and Particulates from Surface Sails FALSE TRUE TRUE by Vadose zone thickness(cm) 3 DE+02 S v Volatilization from Subsurface Soils FALSE TRUE rho Sod density(grcmA3) 17 GW v Voiatitization from Groundwater FALSE TRUE foc Fraction of organic carbon in vadose zone 001 Indoor Air Pathways phi Soil porosity in vadose zone 038 S b Vapors from Subsurface Soils FALSE TRUE Lgw Depth to groundwater(cm) 3 OE+02 GW b Vapors from Groundwater FALSE TRUE Ls Depth to top of affected subsurface sod(cm) 1 OE+02 Soil Pathways Lsubs Thickness of affected subsurface sods(cin) 205+02 SS d Direct Ingestion and Dermal Contact FALSE FALSE TRUE pH SoNgroundwater pH 65 Groundwater Pathways capillary vadose foundation GW i Groundwater Ingestion FALSE FALSE phi w Volumetric water content 0 342 012 012 St Leaching to Groundwater Imm all Sods FALSE FALSE phl a Volumetnc air content 0 038 026 026 Building Definition Units Residential Commercial Lb Building volumefarea ratio(cm) 2 OE+02 3 OE+02 Matrix of Receptor Distance Residential CommerciaVindustrial ER Budding air exchange rate(SA 1) 1 4E-04 2 3E-04 and Location On or Offsite Distance Off-Site Distance Onsite Lcrk Foundation crack thickness(cm) 1 5E+01 GW Groundwater receptor(cm) 4 OE+04 TRUE FALSE eta Foundation crack fraction 001 S Inhalation receptor(cm) FALSE TRUE Transport Matrix of Parameters Dentition Units Residential Cammerclal Target Risks Individual Cumulative Groundwater TRab Target Risk(class A&B carcinogens) 1 OE 06 ex Longitudinal dispersivity(cm) 4 OE+03 TRc Target Rtsk(class C carcinogens) 1 OE-05 ay Transverse dtspersivity(cm) 13E+03 THQ Target Hazard Quotient I OE+OO az Vertical dispersivlty(an) 2 OF+02 Opt Calculation Option(1 2 or 3) 2 Vapor Tier RSCA tier 1 dcy Transverse dispersion coefficient(cm) dcz Vertical dispersion coefficient cm ®Groundwater Services Inc (GSI) 1905 1997 All Rights Reserved