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Table A. Environmental Screening Levels (ESLs) <br /> Shallow Soils (53m bgs) <br /> Groundwater is Current or Potential Source of Drinking Water <br /> 'Shallow Soil <br /> Commercial/ <br /> 2Residential Industrial <br /> Land Use Land Use Only 3Groundwater <br /> Chemical (mg/kg) (mg/kg) (ug/L) <br /> Naphthalene 1.3E+00 2.8E+00 1.7E+01 <br /> Nickel 1.5E+02 1.5E+02 8.2E+00 <br /> Pentachlorophenol 3.0E+00 5.0E+00 1.0E+00 <br /> Perchlorate 1.1E+01 1.4E+02 6.0E+00 <br /> Phenanthrene 1.1E+01 1.1E+01 4.6E+00 <br /> Phenol 7.6E-02 7.6E-02 5.0E+00 <br /> Polychlorinated biphenyls(PCBs) 2.2E-01 7.4E-01 1.4E-02 <br /> Pyrene 8.5E+01 8.5E+01 2.0E+00 <br /> Selenium 1.0E+01 1.0E+01 5.0E+00 <br /> Silver 2.0E+01 4.0E+01 1.9E-01 <br /> Styrene 1.5E+00 1.5E+00 1.0E+01 <br /> tert-Butyl alcohol 7.5E-02 7.5E-02 1.2E+01 <br /> 1,1,1,2-Tetrachloroethane 2.4E-02 2.4E-02 1.3E+00 <br /> 1,1,2,2-Tetrachloroethane 1.8E-02 1.8E-02 1.0E+00 <br /> etrachloroethene 3.7E-01 7.0E-01 5.0E+00 <br /> Thallium 1.3E+00 1.6E+01 2.0E+00 <br /> Toluene 2.9E+00 2.9E+00 4.0E+01 <br /> Toxaphene 4.2E-04 4.2E-04 2.0E-04 <br /> PH(gasolines) 8.3E+01 8.3E+01 1.0E+02 <br /> PH(middle distillates) 8.3E+01 8.3E+01 1.0E+02 <br /> PH(residual fuels) 3.7E+02 2.5E+03 1.0E+02 <br /> 1,2,4-Trichlorobenzene 1.5E+00 1.5E+00 5.0E+00 <br /> 1,1,1-Trichloroethane 7.8E+00 7.8E+00 6.2E+01 <br /> 1,1,2-Trichloroethane 7.0E-02 7.0E-02 5.0E+00 <br /> Trichloroethene 4.6E-01 4.6E-01 5.0E+00 <br /> 2,4,5-Trichlorophenol 1.8E-01 1.8E-01 1.1E+01 <br /> 4,6-Trichlorophenol 2.3E-01 2.3E-01 7.0E-01 <br /> Vanadium 1.6E+01 2.0E+02 1.5E+01 <br /> Vinyl chloride 2.2E-02 4.7E-02 5.0E-01 <br /> Xylenes 2.3E+00 2.3E+00 2.0E+01 <br /> inc 6.0E+02 6.0E+02 8.1E+01 <br /> Notes: <br /> 1.Shallow soils defined as soils less than or equal to 3 meters(approximately 10 feet)below ground surface. <br /> 2.Category"Residential Land Use"generally considered adequate for other sensitive uses. <br /> 3.Assumes potential discharge of groundwater into a freshwater,marine or estuary surface water system. <br /> Soil ESLs intended to address direct-exposure,groundwater protection,ecologic(urban areas)and nuisance concerns under <br /> noted land-use scenarios. Soil gas data should be collected for additional evaluation of potential indoor-air impacts at <br /> sites with areas of VOC-contaminated soil. <br /> Groundwater ESLs intended to be address drinking water,surface water,indoor-air and nuisance concerns. Use in conjunction <br /> with soil gas screening levels to more closely evaluate potential impacts to indoor-air if groundwater screening <br /> levels for this concern approached or exceeded. <br /> Aquatic habitat goals for bioaccumulation concerns not considered in selection of groundwater goals. <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 A <br />