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Table 1-Analytical Results <br /> Limited Site Investigation <br /> Corral Hollow,Tracy,CA <br /> TPH(mg/kg) PAHs(ug/kg) <br /> Sample Depth <br /> Boring Location <br /> Sample ID (feet b s) TPHcr TPHd Chrysene Fluoranthene Benzo(a)anthracene Benzo(a)pyrene Pyrene <br /> SB-8-1-1.5 1-1.5 46Y 4.9 Y NA NA NA NA NA <br /> SB-8 SB-8-3-3.5 3-3.5 210 61 Y NA NA NA NA NA <br /> SB-8-5.5-6 5.5-6 NA NA NA NA NA NA NA <br /> SB-8-7.5-8 7.5-8 NA NA NA NA NA NA NA <br /> Commercial/Industrial ESLs 2,500* 500 4,500 40,000 450 45 85,000 • <br /> Industrial RSLs NA NA 210,000 21200,000 2,100 210 1,700,000 <br /> Protection of Groundwater-Risk-based SSLs NA NA 1,100 7,000 10 3.5 950 <br /> Protection of Groundwater-MCL-Based SSLsj NA NA NA NA NA 240 NA <br /> Notes: <br /> TPHcr=Total petroleum hydrocarbons as crude oil analyzed using EPA Method 8015M <br /> TPHcr=Total petroleum hydrocarbons as diesel analyzed using EPA Method 8015M <br /> PAHs=Polynuclear aromatic hydrocarbons analyzed using EPA Method 8270 SIM <br /> mg/kg=milligrams per kilogram <br /> ug/kg=micrograms per kilogram <br /> bgs=below ground surface <br /> NA=Not analyzed,not applicable <br /> <1=Not detected above the stated reportling limit <br /> Y=Sample exhibits chromatographic pattern which does not resemble standard <br /> Only detected PAHs are shown in the table. • <br /> ESLs=Envrionmental Screening Levels,San Francisco Bay Regional Water Quality Control Board, <br /> Summary Table A.[8hallow Soils( 53 meters bgs),Mroundwater is Current or Potential Source of Drinking Water <br /> Interim Final,May 2013 <br /> *=ESL value is for TPH as residual fuels <br /> RSLs=Regional screening levels for chemical contaminants at Superfund sites,USEPA Region 9,May 2013,based on human health risk <br /> SSLs=Soil Screening Level,based on groundwater protection <br /> MCL=Maximum Contaminant Level <br /> BOLD=Concentration exceeds screening level <br /> Terraphase Engineering, Inc. Page 2 of 2 <br />