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(D (408)8Jarvis Drive <br /> Sequoia Morgan Hi Hill,CA 95037 <br /> 776-9600 <br /> i1W Analytical FAX(408)782-6308 <br /> www.sequoialabs.com <br /> URS Corporation[ArcoI Project:ARCO#0595,CA MPA0137 <br /> 2870 Gateway Oaks Dr.,Ste 300 Project Number:GOBZG-0002 Reported: <br /> Sacramento CA,95833 Project Manager:Vernon P.Elarth 01/20/06 10:54 <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 /> PB-5(MPA0137-05)Soil Sampled: 12/29/05 13:10 Received:01/04/06 08:00 <br /> tert-Amyl methyl ether ND 0.0050 mg/kg I 6A 12012 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) ND 0.0050 " <br /> Gasoline Range Organics(C4-C12) ND 0.10 " <br /> Surrogate: 1,2-Dichloroethane-d4 104% 60-125 " <br /> PB-6(MPA0137-06)Soil Sampled: 12/29/05 13:15 Received:01/04/06 08:00 <br /> tert-Amyl methyl ether ND 0.0050 mg/kg 1 6A12012 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) ND 0.0050 " <br /> Gasoline Range Organics(C4-C12) ND 0.10 <br /> Surrogate: 1,2-Dichloroethane-d4 103% 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 6 of 14 <br />