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TABLE 4-SOIL VAPOR AND SUB-SLAB VAPOR RESULTS SUMMARY TABLE <br /> CVCI-Discovery Investigation Work Plan <br /> Favorite Cleaners <br /> 622 E Charter Way <br /> Stockton,California 95206 <br /> Soil Vapor Soil Vapor Sample <br /> Well ID Location Probe Depth Date Detected Chemicals(µg/m3) <br /> Sample ID (feet bgs) <br /> Tetrachloroethene Trichloroethene 1,2-cis-DCA Vinyl <br /> Chloride <br /> Soil Vapor <br /> SG-1-5 5.0 <br /> SG-1 SG-1 <br /> SG-1-15 15.0 <br /> SG-2-5 5.0 <br /> SG-2 SG-2 <br /> SG-2-15 15.0 <br /> SG-3-5 5.0 <br /> SG-3 SG-3 <br /> SG-3-15 15.0 <br /> SG-4-5 5.0 <br /> SG-4 SG-4 <br /> SG-4-15 15.0 <br /> SG-5-5 5.0 <br /> SG-5 SG-5 <br /> SG-5-15 15.0 <br /> SG-6-5 5.0 <br /> SG-6 SG-6 <br /> SG-6-15 15.0 <br /> SG-Dup 1 5.0 <br /> SG-Duplicate` Random Soil Vapor Location <br /> SG-Dup 2 15.0 <br /> MS/MSD NA NA <br /> Sub-Slab Vapor <br /> SSV-1 SSV-1 Depth Varies <br /> SSV-2 SSV-2 Depth Varies <br /> SSV-3 SSV-3 Depth Varies <br /> SSV-4 SSV-4 Depth Varies <br /> SSV-5 SSV-5 Depth Varies <br /> SSV-6 SSV-6 Depth Varies <br /> SSV-Duplicate' SSV-Dup 1 Depth Varies <br /> Screening Levels' <br /> Notes: <br /> 'Soil Gas Screening Levels <br /> 1.California Department of Toxic Substances Control(DTSC)Human and Ecological Risk Office(HERO)Human Health Risk assessment(HHRH)Note 3,DTSC-modified Screening levels <br /> (DTSC-SLs),Table 3.Ambient Air,adjusted by an attenuation factor(AF)of 0.03 Commercial/Industrial,Cancer Endpoint(DTSC 2022). <br /> 2.DTSC HERO HHRA Note 3,DTSC-SLs,Table 3.Ambient Air adjusted by an AF of 0.03,Commercial/Industrial,Noncancer Endpoint(DTSC 2022). <br /> 3.San Francisco Bay Regional Water Quality Control Board(SFBRWQCB)Commercial/Industrial Cancer Risk Sub-Slab Environmental Screening Levels(SFBRWQCB 2019). <br /> 4.SFBRWQCB Commercial/Industrial NonCancer Hazard Sub-Slab Environmental Screening Levels(SFBRWQCB 2019). <br /> 5.Environmental Protection Agency(EPA)Regional Screening Levels(RSLs)adjusted by an AF of 0.03,Composite Worker Ambient Air,Carcinogenic Target Risk of 1 E-06,November 2023. <br /> 6.EPA RSLs adjusted by an AF of 0.03,Composite Worker Ambient Air Table,Noncancer Target Hazard Quotients of 1.0,November 2023. <br /> 7.The Final Selected Sub Slab Soil Gas Screening Levels are selected from a hierarchy of the following sources: 1.DTSC HERO HHRA Note 3 recommended screening levels for ambient air analytes <br /> adjusted by an attenuation factor of 0.03(DTSC 2022),2.SFBRWQCB Sub-Slab Soil Gas ESLs(SFBRWQCB 2019)3.EPA RSL Composite Worker Air adjusted by an AF of 0.03(EPA 2022).The <br /> lower of the cancer and non-cancer screening levels for commercial/industrial receptors were considered. <br /> 8.Bold shaded cells sionify that the detection is greater than the Final Sg�ecteC�S <br /> 9.Blue shaded cells signify that the method detection limit as greater than the Final Selected Sub-Slab Soil Gas Screening Level. <br /> 10.pg/m3=micrograms per cubic meter <br /> 11.-=not available <br /> 12.bgs=below ground surface <br /> 13.ND=not detected above corresponding reporting limit. <br />