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. 8Hi Jarvis Dave — <br /> Sequoia Morgan Hill CA 95037 <br /> 4D <br /> (408)776 4600 <br /> Analytical FAX(408)782-6308 <br /> www sequoialabs corn <br /> URS Corporation[Arcol] Project ARCO#0760,Lodi,CA MPA 1406 <br /> 2870 Gateway Oaks Dr,Ste 300 Project Number GOC8R-0002 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 02/10/06 16 30 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical - Morgan Hill <br /> Reporting <br /> Analyte Result Limit Units Diluuon Batch Prepared Analyzed Method Note <br /> MW-3(MPA1406-04)Water Sampled 01/24/06 14 20 Received 01/27/06 08 30 <br /> tert-Amyl methyl ether ND 050 ug/1 1 6BO6031 02/06/06 02/07/06 EPA 8260B <br /> Benzene ND 050 " <br /> lert-Butyl alcohol ND 20 " <br /> Di-isopropyl ether ND 050 <br /> 1,2-Drbromoethane(EDB) ND 050 " <br /> 1,2-Dichloroethane 26 050 " <br /> Ethanol ND 300 " <br /> Ethyl tert-butyl ether ND 050 " <br /> Lthylbenzene ND 050 " <br /> Methyl tert-butyl ether ND 050 " <br /> Toluene ND 050 " <br /> Xylenes(total) 13 050 " <br /> Gasoline Range Organics(C4-C12) 160 50 " <br /> Surrogate 12-Dichloroethane-d4 92% 60-135 <br /> dw I <br /> W-4(MPA1406-05)Water Sampled 01124/061325 Received 01/27/06 08 30 <br /> 'Wert-Amy[methyl ether ND 050 ugtl 1 6B06031 02/06/06 02/07/06 EPA 6260E I <br /> Benzene ND 050 " <br /> tert-Butyl alcohol ND 20 " <br /> Di-isopropyl ether ND 050 " <br /> 1,2-Dibromoethane(EDB) ND 050 <br /> 1,2-Dichloroethane ND 050 " <br /> Ethanol ND 300 " <br /> Ethyl tert-butyl ether ND 050 " <br /> Ethylbenzene ND 050 - <br /> Methyl tert-butyl ether ND 050 " <br /> Toluene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Gasoline Range Organics(C4-C12) ND 50 " <br /> Surrogate 12-Dichloroethane-d4 86% 60-135 " <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 />