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Table E. Environmental Screening Levels (ESLs) <br /> Indoor Air and Soil Gas <br /> (Vapor Intrusion Concerns) <br /> Indoor Air 2Shallow Soil Gas <br /> Screening Levels Screening Levels <br /> Commercial/ ommercia <br /> 'Residential Industrial 'Residential Industrial <br /> Land Use Land Use Only Land Use Land Use Only <br /> Chemical (Ng/m') (Ng/m3) (Ng/m3) (Ng/m3) <br /> Naphthalene 7.2E-02 1.2E-01 7.2E+01 2.4E+02 <br /> Nickel <br /> Pentachlorophenol <br /> Perchlorate <br /> Phenanthrene 2.2E+01 3.1 E+01 2.2E+04 6.1 E+04 <br /> Phenol <br /> Polychlorinated biphenyls(PCBs) <br /> Pyrene 2.2E+01 3.1 E+01 2.2E+04 6.1 E+04 <br /> Selenium <br /> Silver <br /> Styrene 1.9E+02 2.6E+02 1.9E+05 5.3E+05 <br /> tert-Butyl alcohol <br /> 1,1,1,2-Tetrachloroethane 3.2E-01 5.4E-01 3.2E+02 1.1 E+03 <br /> 1,1,2,2-Tetrachloroethane 4.2E-02 7.0E-02 4.2E+01 1.4E+02 <br /> Tetra chloroethene 4.1 E-01 6.9E-01 4.1 E+02 1.4E+03 <br /> Thallium <br /> Toluene 6.3E+01 8.8E+01 6.3E+04 1.8E+05 <br /> Toxaphene <br /> TPH (gasolines) 1.0E+01 1.4E+01 1.0E+04 2.9E+04 <br /> TPH (middle distillates) 1.0E+01 1.4E+01 1.0E+04 2.9E+04 <br /> TPH (residual fuels) <br /> 1,2,4-Trichlorobenzene 8.3E-01 1.2E+00 8.3E+02 2.3E+03 <br /> 1,1.1-Trichloroethane 4.6E+02 6.4E+02 4.6E+05 1.3E+06 <br /> 1,1,2-Trichloroethane 1.5E-01 2.6E-01 1.5E+02 5.1E+02 <br /> Trichloroethene 1.2E+00 2.0E+00 1.2E+03 4.1 E+03 <br /> 2.4,5-Trichlorophenol 7.3E+01 1.0E+02 7.3E+04 2.0E+05 <br /> 2.4,6-Trichlorophenol <br /> Vanadium <br /> Vinyl chloride 3.1 E-02 5.2E-02 3.1 E+01 1.0E+02 <br /> Xylenes 2.1 E+01 2 9E+01 2.1 E+04 5.8E+04 <br /> Zinc <br /> Notes: <br /> 1 Category"Residential Land Use"generally considered adequate for other sensitive uses(e.g., day-care centers, hospitals,etc) <br /> 2. Soil Gas: Screening levels based on soil gas data collected below a building or the <br /> ground surface. Intended for evaluation of potential indoor-air impacts. <br /> Soil gas data should be collected and evaluated at all sites with significant areas of VOC-contaminated soil.Screening <br /> levels also apply to areas over of contaminated groundwater. <br /> TPH-Total Petroleum Hydrocarbons. TPH ESLs must be used in conjunction with ESLs for related chemicals(e.g., BTEX, PAHs <br /> oxidizers, etc). <br /> INTERIM FINAL - November 2007 <br /> SF Bay RWQCB Page 3 of 3 Summary Table E <br />