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t EVALUATIONRBCA TIER 1/TIER 2 Output 791FIM Site Name: Stockton Fire Station#3 Job Identification: 82574.0005 Software: GSI RBCA Spreadsheet S"Location: 1116 First Street,Stockton,C/Date Completed: 3/14/2000 Version: 1.0.1 Completed By'. JEANNE HOMSEY NOTE:values which differ from Tier 1 default values are shown in bold italics and underlined. Exposure Residential Commerclallndustrial Surface Parameter Definition Units Adult 1 rs) [1-18 Chronic Constrctn Parameters Definition(Units) Residential Constrctn ATc Averaging time for carcinogens(yr) 70 A Contaminated soil area(cmA2) 1.3E+05 1.0E+08 ATn Averaging time for non-carcinogens(yr) 30 6 16 25 1 W Length of affect soil parallel to wind(cm) 1.8E+02 1.0E+03 BW Body Weight(kg) 70 15 35 70 W.gw Length of affect soil parallel to groundwater(cm 4-6E+02 ED Exposure Duration(yr) 30 6 16 25 1 Uair Ambient air velocity in mixing zone(cm/s) 2.3E+02 t Averaging time for vapor flux(yr) 30 25 1 delta Air mixing zone height(cm) 2.0E+02 EF Exposure Frequency(days" 350 250 180 Lss Thickness of affected surface soils(cm) 4-AE±02 EF.Derm Exposure Frequency for dermal exposure 350 250 Pe Particulate areal emission rate(g/cmA2/s) 8.9E-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-yr/kg-d) 1.1E+02 9.4E+01 Groundwater Definition(Units) Value IRa.in Inhalation rate indoor(mA3/day) 15 20 detta.gw Groundwater mixing zone depth(cm) 2.0E+02 IRa.out Inhalation rate outdoor(mA3/day) 20 20 10 1 Groundwater infiltration rate(cm/yr) 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(cm/yr) 2.5E+03 SAadj Adjusted dermal area(cmA2-yr/kg) 2.1 E+03 1.7E+03 Ugw.tr Groundwater velocity seepage M Soil to Skin adherence factor 1 rfy(cam 8.8E+03 Ks Saturated hydraulic conductivity(crnls) AAFs Age adjustment on soil ingestion FALSE FALSE grad Groundwater gradient(cm/cm) AAFd Age adjustment on skin surface area FALSE FALSE Sw Width of groundwater source zone(cm) box Use EPA box data for air(or PEL based)? TRUE Sd Depth of groundwater source zone(cm) gwMCL? Use MCL as exposure limit in groundwater? FALSE phi.eff Effective porosity in water-bearing unit 3.8E-01 foc.sat Fraction organic carbon in water-bearing unit 1.0E-03 BIO? Is bioattenuation considered? TRUE BC Biodegradation Capacity(mg/L) Matrix of Exposed Persons to Residential CommerolaUlndM usal Complete Exposure Pathways Chronic Constrctn Soil Definition(Units) Value Outdoor Air Pathways: he Capillary zone thickness(cm) 9-IE+01 SS.v Volatiles and Particulates from Surface Soils FALSE FALSE FALSE by Vadose zone thickness(cm) 9.8E+02 S.v Volatilization from Subsurface Soils TRUE TRUE rho Soil density(g/cmA3) 1,7 GW.v Volatilization from Groundwater FALSE TRUE foc Fraction of organic carbon in vadose zone 0.01 Indoor Alr Pathways: phi Soil porosity in vadose zone 0.38 S.b Vapors from Subsurface Soils FALSE TRUE Lgw Depth to groundwater(cm) 1.fE+03 GW.b Vapors from Groundwater FALSE TRUE Ls Depth to top of affected subsurface soil(cm) 4.9E+0Y Soil Pathways: Lsubs Thickness of affected subsurface soils(cm) 3.7E+02 SSA Direct Ingestion and Dermal Contact FALSE TRUE TRUE pH Soil/groundwater pH 6.5 Groundwater Pathways: capillary vadose foundation GW.i Groundwater Ingestion TRUE TRUE phi.w Volumetric water content 0.342 0.12 0.12 S.I Leaching to Groundwater from all Soils TRUE TRUE phi,a Volumetric air content 0.038 0.26 0.26 Building Definition(Units) Residential Commercial Lb Building volume/area ratio(cm) 2.0E+02 3.0E+02 Matrix of Receptor Distance Residential Commerclal/lndustrlal ER Building air exchange rate(s"-1) 1.4E-04 2.3E-04 and Location On-or Offsite Distance Onsite Distance OnStte Lcrk Foundation crack thickness(cm) 6.0E+00 GW Groundwater receptor(cm) 4.6E+03 FALSE TRUE eta Foundation crack fraction 0.01 S Inhalation receptor(cm) 3.0E+03 FALSE TRUE Transport Matrix of Parameters Definition(Units) Residential Commercial Target Risks Individual Cumulative Groundwater TRab Target Risk(class A&B carcinogens) 1.0E-05 ax Longitudinal dis ersivi ty( ) 2.8E+02 TRc Target Risk(class C carcinogens) 1.0E-05 ay Transverse dispersrvity(cm) 2.9E+01 THQ Target Hazard Quotient 1.0E+00 az Vertical dispersivity(cm) 2,8E+00 Opt Calculation Option(1,2,or 3) 2 Vapor Ter RBCA Ter 2 dcy Transverse dispersion coefficient(cm) dcz Vertical dispersion coefficient cm 0 Groundwater Services,Inc.(GSI),1995-1997.All Rights Reserved.