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^V_ Hi 8Jarvis Drive <br /> Sequoia Morgan Hill,CA 95037 <br /> (408)776-9600 <br /> � Analytical FAX(408) 08 <br /> www.sequoialabs.clabs.com <br /> URS Corporation[Arco 11 Project:ARCO#0595,CA MPA0141 <br /> 2870 Gateway Oaks Dr.,Ste 300 Project Number:GOBZG-0002 Reported: <br /> Sacramento CA,95833 Project Manager:Vernon P.Elarth 01/18/06 17:37 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical-Morgan Hill <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Note <br /> DI-1-7'(MPA0141-01)Soil Sampled: 12/29/05 14:20 Received:01/04/06 08:00 <br /> tert-Amyl methyl ether ND 0.62 mg/kg 25 6A12019 01/12/06 01/12/06 EPA 8260B PF <br /> Benzene ND 1.2 " <br /> tert-Butyl alcohol ND 120 PE <br /> Di-isopropyl ether ND 0.62 PF <br /> 1,2-Dibromoethane(EDB) ND 0.62 " <br /> 1,2-Dichloroethane ND 0.62 " <br /> Ethanol ND 250 IC <br /> Ethyl tert-butyl ether ND 0.62 " <br /> Ethylbenzene 3.8 1.2 " <br /> Methyl tert-butyl ether ND 0.62 PF <br /> Toluene ND 1.2 " <br /> Xylenes(total) 28 1.2 " <br /> Gasoline Range Organics(C4-C12) 610 62 " <br /> Surrogate: 1,2-Dichloroethane-d4 104% 60-125 <br /> LS-1-6'(MPA0141-02)Soil Sampled: 12/29/05 14:30 Received:01/04/06 08:00 <br /> tert-Amyl methyl ether ND 0.0050 mg/kg 1 6A12013 01/12/06 01/12/06 EPA 8260B <br /> Benzene ND 0.0050 " <br /> tert-Butyl alcohol ND 0.020 " <br /> Di-isopropyl ether ND 0.0050 " <br /> 1,2-Dibromoethane(EDB) ND 0.0050 " <br /> 1,2-Dichloroethane ND 0.0050 " <br /> Ethanol ND 0.10 " <br /> Ethyl tert-butyl ether ND 0.0050 " <br /> Ethylbenzene ND 0.0050 " <br /> Methyl tert-butyl ether ND 0.0050 " <br /> Toluene ND 0.0050 <br /> Xylenes(total) 0.020 0.0050 <br /> Gasoline Range Organics(C4-C12) 1.8 0.10 " <br /> Surrogate:1,2-Dichloroethane-d4 65% 60-125 " <br /> Sequoia Analytical-Morgan Hill The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document.Unless otherwise stated,results are reported on a wet weight basis. <br /> This analytical report must be reproduced in its entirety. <br /> Page 4 of 11 <br />