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t TABLE 1 <br /> SOIL ANALYTICAL RESULTS (TPHc AND BTEX)1,2 <br /> TRACY BYRON ROAD <br /> Tracy, California <br /> Concentrations reported in mg/kg <br /> ' Depth Date Ethyl- Total <br /> Boring ID I (feet bgs) Collected TPH, Benzene Tolucne benzene Xylenes <br /> SCREENING ESL 410 ' 0.044 4 2.9 4 3.3 4 2.3 ° <br /> ' LEVELS PRG --- 0.002 s 0.6' 0.7 5 101 <br /> SB-37 5 3/13/2007 <4.0 <0.0005 <0.00I <0.001 <0.001 <br /> 14.5 3/13/2007 <4.0 <0.0005 <0.001 <0.001 <0.001 <br /> ' SB-38 5 3/13/2007 <4.0 <0.0005 <0.001 <0.001 <0.001 <br /> 15.5 3/13/2007 <4.0 <0.0005 <0.001 <0.001 <0.001 <br /> SB-39 5 3/12/2007 <4.0 <0.0005 <0.001 <0.001 <0.001 <br /> 15 3/12/2007 <4.0 <0.0005 <0.001 <0.001 <0.001 <br /> SB-40 5 3/12/2007 <4.0 <0.0005 <0.001 <0.001 <0.001 <br /> 14 3/12/2007 <4.0 <0.0005 <0.001 <0.001 <0.001 <br /> SB-41 5 3/12/2007 <4.0 <0.0005 <0.001 <0.001 <0.001 <br /> 27 3/12/2007 <4.0 1 <0.0005 <0.001 <0.001 <0.001 <br /> Abbreviations: <br /> <=Denotes analyte not detected at or above the laboratory reporting limit <br /> bgs=Below ground surface <br /> BTEX=Benzene,toluene,ethylbenzene,and total xylenes <br /> EPA=U.S.Environmental Protection Agency <br /> ' ESL=Environmental Screening Level <br /> ID=Identification <br /> mg/kg=Milligrams per kilogram <br /> PRG=Preliminary Remediation Goal <br /> RWQCB=Regional Water Quality Control Board <br /> SAIC=Science Applications International Corporation <br /> ' TPHc=Total petroleum hydrocarbons quantified as crude oil <br /> Notes: <br /> 1. Samples were collected by SAIC and analyzed by Lancaster Laboratories,Inc.for TPHc using EPA Method 8015B <br /> ' modified(Ctn-C36),and BTEX using EPA Method 8260B. <br /> 2. See Appendix D for data usability summary, <br /> 3. ESL Direct Exposure(Human Health) <br /> 4. ESL"Leaching to Groundwater"concentration in soil for the protection of current or potential drinking water resour, <br /> based on concentration modeled to leach to groundwater at or above the health-based screening level. <br /> 5. PRG Soil Screening Level for the protection of groundwater(dilution attenuation factor of 1). <br /> Sources: <br /> ESLs from the San Francisco Bay RWQCB Screening for Environmental Concerns at Sites with Contaminated Soil <br /> and Groundwater (Interim Final February 2005). <br /> PRGs from EPA'Region 9 PRGs Table"(October 2004);http://www.epa.gov/region9/waste/sfund/prg/index.htn l#prgt <br /> i <br /> III <br /> ' Page 1 of 1 From Science to Solutions <br />