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la) (408) <br /> 8Jarvis Drive <br /> Sequoia Morgan Hi Hill,CA 95037 <br /> mW Analytical 776-9600 <br /> FAX(408)782-6308 <br /> www.sequoialabs.com <br /> URS Corporation[Arco II Project:ARCO#0595,CA MPA0033 <br /> 2870 Gateway Oaks Dr.,Ste 300 Project Number:GOBZG-0002 Reported: <br /> Sacramento CA,95833 Project Manager:Vemon P.Elarth 01/06/06 15:57 <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 /> SP-15-18 Composite(MPA0033-01)Soil Sampled:01/03/06 11:30 Received:01/04/0608:00 <br /> tert-Amyl methyl ether ND 0.50 mg/kg 20 6AO4040 01/04/06 01/06/06 EPA 8260B <br /> Benzene ND 1.0 " <br /> tert-Butyl alcohol ND 100 " <br /> Di-isopropyl ether ND 0.50 " <br /> 1,2-Dibromoethane(EDB) ND 0.50 " <br /> 1,2-Dichloroethane ND 0.50 " <br /> Ethanol ND 200 IC <br /> Ethyl tert-butyl ether ND 0.50 " <br /> Ethylbenzene 3.7 1.0 " <br /> Methyl tert-butyl ether ND 0.50 pi- <br /> Toluene <br /> PToluene 1.5 1.0 " <br /> Xylenes(total) 29 1.0 " <br /> Gasoline Range Organics(C4-C12) 540 50 " <br /> Surrogate: 1,2-Dichloroethane-d4 107% 60-125 <br /> SP-19-22 Composite(MPA0033-02)Soil Sampled:01/03/06 11:45 Received:01/04/0608:00 <br /> tert-Amyl methyl ether ND 0.12 mg/kg 5 6AO4040 01/04/06 01/06/06 EPA 8260B <br /> Benzene ND 0.25 " <br /> tert-Butyl alcohol ND 25 " <br /> Di-isopropyl ether ND 0.12 " <br /> 1,2-Dibromoethane(EDB) ND 0.12 " <br /> 1,2-Dichloroethane ND 0.12 <br /> Ethanol ND 50 Ic <br /> Ethyl tert-butyl ether ND 0.12 " <br /> Ethylbenzene 3.5 0.25 " <br /> Methyl tert-butyl ether ND 0.12 Pr: <br /> Toluene 0.74 0.25 " <br /> Xylenes(total) 27 0.25 " <br /> Gasoline Range Organics(C4-C12) 620 25 I0 01/06/06 " <br /> Surrogate:1,2-Dichloroethane-d4 107% 60-125 01106106 " <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 8 <br />