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Tier 1 ENVIRONMENTAL SCREENING LEVELS SEARCH <br /> SUMMARY FORM <br /> San Francisco Bay Regional Water Quality Control Board <br /> _ California Environmental Protection Agency <br /> (Referenced ESLS:February 2005) <br /> Site Name: San Joaquin County Courthouse <br /> Site Address: 222'E.Weber Ave.,Stockton <br /> Site ID Number: 70607700470 <br /> Date of ESL Searcb: <br /> Selected Site Scenario <br /> Land Use: Commercial or <br /> Industrial <br /> Depth to Impacted Soil: Shallow Soil <br /> w Groundwater Utility: Drinking Water <br /> Resource <br /> Selected Chemical of Concern: TPH(gasolines) <br /> Input Site Concentrations: <br /> ., Soil(mg/kg): 1800 <br /> Groundwater(ug/L): 63.1 <br /> Tier 1 ESL <br /> Exceeded? <br /> Soil Tier 1 ESLS: Units ESL Referenced Table <br /> Direct Exposure: mg/kg 7.5E+02 Yes <br /> Vapor Emissions To Indoor Air: mg/kg (Use soil gas) No <br /> Terrestrial Ecological Impacts: mg/kg - No Table A-2: <br /> Gross Contamination: mg/kg 5.0E+02 Yes <br /> ...� Leaching: mg/kg 1.0E+02 I Yes <br /> Lowest Soil ESL: mg/kg 1.0E+02 <br /> Groundwater Tier 1 ESLS: Units ESL Referenced Table <br /> Drinking Water(Toxicity): ug/L 2.1E+02 No <br /> Vapor Emissions To Indoor Air: ug/L (Use soil gas) No `fable F-la <br /> Impacts to Aquatic Habitats: ug/L 5.0E+02 No <br /> Gross Contamination: ug/L 1.0E+02 No <br /> Lowest Groundwater ESL: ug/L 1.0E+02 <br /> Other Tier 1 ESLS: Units ESL Referenced Table <br /> Indoor Air: ug/m3 3.6E+01 Table E-3 <br /> Shallow Soil Gas: ug/m3 7.2E+04 Table E-2 <br /> Reference: <br /> Screening For Environmental Concerns at Sites With Contaminated Soil and Groundwater (February 2005), San <br /> Francisco Bay Regional Water Quality Control Board,California EPA, <br /> http://www.waterboards.ca.gov/sanfranciscobay/esl.htm <br /> Source Tables: Referenced Table from Appendix i of ESL document. <br /> Tier 1 ESL Surfer <br /> Version: October 2005 ESL Surfer-Surfer Report <br />