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Vapor Intrusion Assessment Work Plan Project number:60653972 <br /> Table 1. Sub-Slab and Downhole Soil Gas Target Levels and Reporting Limits by TO-15 <br /> Anal to I Tier 1 ESL Reporting Limit' <br /> Volatile Organic Compounds by Method TO-15 /m3 <br /> Benzene 3.2 1.6 <br /> Carbon tetrachloride 15.6 3.1 <br /> Chloroethane 350,000 5.3 <br /> Chloroform 4.1 2.4 <br /> Chloromethane 3,100 10 <br /> 1,2-Dibromoethane(EDB) 0.16 3.8 <br /> Dichlorodifluoromethane Freon 12 NS 2.5 <br /> 1,1-Dichloroethane 58 2.0 <br /> 1,2-Dichloroethane 3.6 2.0 <br /> 1,1-Dichloroethene 2,400 2.0 <br /> cis-1,2-Dichloroethene 280 2.0 <br /> trans-1,2-Dichloroethene 2,800 2.0 <br /> Eth lbenzene 37 2.2 <br /> 1,1,2,2-Tetrachloroethane 1.6 3.4 <br /> Tetrachloroethene 15 3.4 <br /> Toluene 10,000 1.9 <br /> 1,1,1-Trichloroethane 35,000 2.7 <br /> 1,1,2-Trichloroethane 5.8 2.7 <br /> Trichloroethene 16 2.7 <br /> Vinyl chloride 0.32 1.3 <br /> o-X lene 3,500 2.2 <br /> /m-X lene 3,500 2.2 <br /> Methyl tert-butyl ether MTBE 360 1.8 <br /> Notes: <br /> a=Base reporting limit(based on no dilution) <br /> bold=reporting limit higher than ESL.Detections will be reported to the limit of detection <br /> µg/m3=Micrograms per cubic meter <br /> ESL=Environmental Screening Level(California Water Boards,January 2019,rev.2) <br /> NS=No Standard <br /> Prepared for: California Regional Water Quality Control Board,Central Valley Region AECOM <br />