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i <br /> Table 4 <br /> Soil Analytical Results Summary(TPHc & BTEX)t <br /> Chevron-Historical Pipeline Portfolio <br /> Pombo Property- 1755 West 11th Street <br /> Tracy, California <br /> Concentrations in milligrams per kilogram (mg/kg) <br /> Depth <br /> Sample Interval Ethyl- <br /> Boring ID Date Sample ID (feet bgs) TPHc Benzene Toluene benzene Xylenes <br /> S13-1 11/5/2003 S13-1-S-8 8 <4.0 <0.005 <0.005 <0.005 <0.02 <br /> SB-2 11/5/2003 S13-2-S-8 8 <4.0 <0.005 <0.005 <0.005 <0.02 <br /> S13-3 11/5/2003 S13-3-S-8 8 <4.0 <0.005 0.005 <0.005 0.02 <br /> S13-4 11/5/2003 S13-4-S-5 5 5.6 <0.005 <0.005 <0.005 <0.02 <br /> S13-4 11/5/2003 S13-4-S-8 8 <4.0 <0.005 <0.005 <0.005 <0.02 <br /> S13-5 11/5/2003 S13-5-S-8 8 <4.0 <0.005 <0.005 <0.005 <0.02 <br /> S13-6 11/5/2003 S13-6-S-8 8 <4.0 <0.005 <0.005 <0.005 <0.02 j <br /> SB-7 2/25/2004 S13-7-S-7 7 <4.0 <0.005 <0.005 <0.005 <0.02 <br /> S13-8 2/25/2004 S13-8-S-7 7 <4.0 <0.005 <0.005 <0.005 <0.02 <br /> SB-9 2/25/2004 S13-9-S-6 6..y. - <4.0 <0.005 <0.005 <0.005 <0.02 <br /> SB-10 2/25/2004 SB-10-S-7 7 <4.0 <0.005 <0.005 <0.005 <0.02 <br /> j SB-11 2/25/2004 SB-11-S-11 11 <4.0 <0.005 <0.005 <0.005 <0.02 <br /> Abbreviations: <br /> <=Analyte not detected above the laboratory reporting limit shown <br /> bgs=below ground surface <br /> TPHc=total petroleum hydrocarbons quantified as crude oil(CIO-C36). <br /> Notes: <br /> Detected concentrations are noted in bold face type. <br /> 1. Samples were collected by SAIC and analyzed by Lancaster Laboratories,Inc.for TPHc using <br /> EPA Method 8015 modified,and benzene,toluene,ethylbenzene and total xylenes using <br /> EPA Method 826013. <br /> i <br /> i _ <br />