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Table A <br /> Satellite Apartments Soil Gas Analytical Results <br /> Stockton,California <br /> Project Number 911613.02 <br /> Indoor Air SLs - Indoor Air SLs <br /> METHOD CONSTITUENT ASG-1-5 ASG-2-5 Sub-1 Sub-2 Residential Air Source Divided by AF LTCP <br /> (0.03)** <br /> Dibromochloromethane <4.4 <4.4 <4.4 <4.4 NL -- <br /> Dichlorodifluoromethane <2.5 <2.5 <2.5 <2.5 1.0E+02 nc R 3.3E+03 <br /> Diiso ro 1 ether DIPE <2.1 <2.1 <2.1 <2.1 7.3E+02 nc R 2.4E+04 <br /> Ethanol 100 <95 <95 <95 NL --Ethyl acetate <1.9 <1.9 <1.9 <1.9 7.3E+01 nc R 2.4E+03 <br /> Ethyl tert-butyl ether ETBE <2.1 <2.1 <2.1 <2.1 3.5E+01 c R 1.2E+03 <br /> Ethyl Benzene 4.3 <2.2 <2.2 <2.2 1.1E+00 c R 3.7E+01 1.1E+03 <br /> Freon 113 6.2 <3.9 <3.9 <3.9 5.2E+03 nc R 1.7E+05 <br /> He tane <21 <21 <21 <21 4.2E+02 nc R 1.4E+04 <br /> Hexachlorobutadiene <2.2 <2.2 <2.2 <2.2 1.3E-01 c N3 4.3E+00 <br /> Hexachloroethane <4.9 <4.9 <4.9 <4.9 2.6E-01 c R 8.7E+00 <br /> Hexane <18 <18 <18 <18 7.3E+02 nc R 2.4E+04 <br /> m, -X lene 12 5.3 <4.4 <4.4 1.0E+02 nc R 3.3E+03 <br /> Methyl tert-butyl ether MTBE <1.9 <1.9 <1.9 <1.9 1.1E+01 c R 3.7E+02 <br /> TO-15 Methylene Chloride <8.8 <8.8 <8.8 <8.8 1.0E+00 c N3 3.3E+01 <br /> Methyl methac late <2.1 <2.1 <2.1 <2.1 NL Naphthalene <2.7 <2.7 <2.7 <2.7 8.3E-02 c R 2.8E+00 9.3E+01 <br /> o-X lene 3.6 <2.2 <2.2 <2.2 1.0E+02 nc R 3.3E+03 <br /> Styrene <2.2 <2.2 <2.2 <2.2 9.4E+02 nc N3 3.1E+04 <br /> t-Butyl alcohol(TBA) <16 <16 <16 <16 5.2E+04 nc R 1.7E+06 <br /> Tetrachloroethene 6.4 <3.5 <3.5 <3.5 4.6E-01 c N3 1.5E+01 <br /> Tetrah drofuran <3.0 <3.0 <3.0 <3.0 2.1E+03 nc R 7.0E+04 <br /> Toluene 28 6.9 <1.9 <1.9 3.1E+02 nc N3 1.0E+04 <br /> trans-1,2-Dichloroethene <2.0 <2.0 <2.0 <2.0 8.3E+01 nc N3 2.8E+03 <br /> trans-l,3-Dichloro ro ene <2.3 <2.3 <2.3 <2.3 NL -- <br /> Trichloroethene <2.8 <2.8 <2.8 <2.8 4.8E-01 c R 1.6E+01 <br /> Trichlorofluoromethane <2.9 <2.9 <2.9 <2.9 1.3E+03 nc N3 4.3E+04 <br /> Vinyl Acetate <18 <18 <18 <18 2.1E+02 nc R 7.0E+03 <br /> Vinyl Chloride <0.26 <0.26 <0.26 <0.26 9.5E-03 c N3 3.2E-01 <br /> X lene total 16 5.3 <2.2 <2.2 1.0E+02 nc R 3.3E+03 <br /> Bold Red Text=Exceeds Indoor Air SLs Divided by AF <br /> All results are reported in ug/m3(micrograms per cubic meter) <br /> All samples were collected on May 13,2024 <br /> NL:Not listed <br /> --=Not applicable <br /> c=cancer;nc=noncancer <br /> R=US EPA Regional Screen Levels(RSL)Resident Air Table November 2023 Update.N3=Human Health Risk Assessment(HHRA)Note 3,June 2020 revised May 2022 <br /> SL=Screening Level <br /> LTCP=State Water Resources Control Board's Low-Threat Underground Storage Tank Case Closure Policy-Soil Gas Criteria for No Bioattenuation Zone for Residential Properties <br /> "Detected soil gas concentrations are compared to attenuated indoor air screening levels for residential air.The attenuation factor(AF)for soil gas to indoor air is 0.03.The AF is divided into the indoor air SL for residential air for the respective <br /> constituent of concern. <br /> X:\Project\9000_pzj\9ll6 HACSJ As-Needed Phase I&II ESAs\9116B Satellite Apartments Phase I ESA\Phase II ESA\Reports\Phase II\App C Tables\Results Tables SF.xlsTable A-Soil Gas 2 of 2 <br />