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r r r r r t r r r r r r r t r r r r RBCA • Output Tab e 1 Site Name-McDowell and Davis Towing,JCB Identification: 1204 Soflwara:GSI RSCA Spreadsheet Site Location:Escalon,San Joaquin County,nle Completed: 05/12/2002 Version: 1.0.1 Completed By: Robert Fourt,CEG/CHG NOTE:values which differ from Tier 1 default values are shown in bold Italics and underlined. s Exposure Residential CommerclalfIndustrial Surface Parameter Definition Units Adult (11-Gyral 1-16 fs) Chronic Constmtn Parameters Definition(Units) Residential Constrctn ATc Averaging time for carcinogens(yr) 70 A Contaminated soil area(cW2) ?.UE+Dg 1.0E+06 ATn Averaging time for noncarclnogens(yr) 30 6 16 25 1 W Length of affect.soil parallel to wind(cm) 3.7E+D2 3.7E+ BW Body Weight(kg) 70 15 35 70 W.gw Length of affect,soil parallel to groundwater(am 3.1e+0 ED Exposure Duration(yr) 30 6 16 25 1 Uair Ambient air velocity in mixing zone(cm/s) 2.3E+02 I Averaging time for vapor flux(yr) 30 25 1 delta Air mixing zone height(cm) 2,0E+02 EF Exposure Frequency(dayslyr) 350 250 180 Las Thickness of affected surface soils(cm) EF.Denn Exposure Frequency for dermal exposure 350 250 Pe Particulate areal emission rate(glcm'2Js) 6.9E-14 IRgw Ingestion Rate of Water(Qday) 2 1 IRs Ingestion Rate of Soil(mg/day) 100 200 50 100 IRadj Adjusted soil Ing.rate(mg-yrlkg-d) 1.1E+02 9.4E+01 Groundwatar Definition(Units) Value IRa.in Inhalation rate indoor(mA3lday) 15 20 delta.9w, Groundwater mixing zone depth(cm) 2.DE+02 IRa.out inhalation rate Outdoor(mA3lday) 20 20 10 1 Groundwater infiltration rate(cmlyr) 3.0E+01 SA Skin surface area(dermal)(cmA2) 5.8E+03 2.0E+03 5.8E+03 5.8E+03 Ugw Groundwater Darcy velocity {�1 SAadj Adjusted dermal area(c mA2-yrlkg) 2.1E+03 1.7E+03 Ugw.ir Groundwater seepage vefoctly,(cm/yr) M Soil to Skin adherence factor 1 Ks Saturated hydraulic conductivity(cm/s) 1.0E-03 AAFs Age adjustment on soil ingestion FALSE FALSE grad Groundwater gradient(cnlcn) 1.8E-01 ,t AAFd Age adjustment on skin surface area FALSE FALSE Sw Width of groundwater source zone(em) 6.1E+02 6 tox Use EPA tox data for air(or PEL based)? FAL F Sd Depth of groundwater source zone(cm) 3.0E+02 Y gwMCL? Use MCL as exposure limit in groundwater? TRUE phi.efl Effective porosity in water-bearing unit 3.8E-01 - foc.sat Fraction organic carhon in water-bearing unit 1.0E-03 BIO? Is bloattenuation considered? TRUE BC Biodegradation Capacity(mg1L) Matrix of Exposed Persons to Residential Commercialllndustrial Complete Exposure Pathways Chronic Constrctn Soil Definition(Units) Value Outdoor Air Pathways: he Capillary zone thickness(cm) 3.DE+01 ^ } SS.v Volatiles and Particulates from Surface Soils FALSE FALSE FALSE by Vadose zone thickness(cm) 1.8E+03 r - ?' S.v Volatilization from Subsurface Soils TRUE TRUE rho Soil density(glcmA3) 1.7 GW.v Volatilization from Groundwater FALSE TRUE foe Fraction of organic carbon In vadose zone 01001 Indoor Air Pathways: phi Soil porosity In vadose zone 0.38 S.b Vapors from Subsurface Soils FALSE TRUE Lgw Depth to groundwater(cm) 1.8E+ ' GW.b Vapors from Groundwater FALSE TRUE Ls Depth to top of affected subsurface soil(em) 2.3E+02 Soil Pathways: Lsubs Thickness of affected subsurface soils(cm) 3.0E+02 SSA Direct Ingestion and Dermal Contact FALSE TRUE TRUE pH Soll/groundwater pH 6.5 Groundwater Pathways: capillary vadose foundation GW.i Groundwater Ingestion FALSE TRUE phl.w Volumetric water content 0.342 0.12 0.12 S.1 Leaching to Groundwater from all Sails FALSE TRUE phi.a Volumetric air content 0.038 0.26 0.26 Building Definition(Units) _ Residential Commercial Lb Building volumtelarea ratio(en) 2.0E+02 3.0E+02 Matrix of Receptor Distance Residential Commerclalllndustr)ai ER Building air exchange rate(ski) 1.4E-04 2.3E-04 and Location On-or Off-Site Distance Onsite Distance On-Site Luk Foundatlan crack thickness(cm) 1.5E+01 GW Groundwater receptor(cm) 2.3E+04 FALSE 2.3E+04 FALSE eta Foundation crack fraction 0.01 S Inhalation receptor(cm) 7.6E+03 FALSE TRUE Transport Matrix of Parameters Definition{Units) Residential Commerclel Target Risks individual Cumulative Groundwater TRab Target Risk(Gass AdB carcinogens) 1,0E-06 1.0E-04 ax Longitudinal dispersivity(cm) 2.3E+03 TRc Target Risk(class C carcinogens) 1.0E-05 ay Transverse dispersivity(cm) 7.6E+02 THO Target Hazard Quotient 1.0E+00 1.0E+00 az Vertical dispersivity(cm) 1.1E+02 Opt Calculation Option(1,2,or 3) 3 Vapor Tier RBCA Tier 2 dcy Transverse dispersion confident(cm) dcz Vertical dispersion coefficient cin Z Groundwater Services,Inc,(GSI),1995-1997.All Rights Reserved.