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885 lams Drive <br /> Sequoia Morgan Hill CA 95035037 <br /> Y (408)776 9600 <br /> IW Analytical FAX(408)7826308 <br /> www sequoialabs com <br /> URS Corporation[Arco II Project ARCO 95469, Stockton, CA M0I0324 <br /> 2870 Gateway Oaks Dr, Ste 300 Project Number GOBZP-0002 Reported <br /> Sacramento CA,95833 Project Manager Jay Johnson 09/28/05 09 43 <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 /> MW-5(MOI0324-05)Water Sampled 09/08/05 07 01 Received 09/09/05 07 55 <br /> tert-Amyl methyl ether ND 050 ugtl 1 5121005 09/21/05 09/21/05 EPA 8260E <br /> Benzene ND 050 " <br /> tert-Butyl alcohol ND 20 " <br /> Di-isopropyl ether ND 050 " <br /> 1,2-Dtbromoethane(EDB) ND 050 " <br /> 1,2-Dichloroethane ND 050 " <br /> Ethanol ND 100 " <br /> Ethyl tert-butyl ether ND 050 " <br /> Ethylbenzene ND 050 <br /> Methyl tert-butyl ether 57 050 " <br /> Toluene ND 050 " <br /> Xylenes(total) ND 0 50 " <br /> Gasoline Range Organics(C4-C12) 55 50 PV <br /> Surrogate 12-Dtchloroethane-d4 96% 60-135 <br /> 6(MOI0324-06)Water Sampled 09/08/05 06 31 Received 09/09/05 07 55 <br /> tert-Amyl methyl ether ND 50 ugtl 100 5121005 09/21/05 09/21/05 EPA 8260B <br /> Benzene ND 50 " <br /> tert-Butyl alcohol ND 2000 <br /> Di-isopropyl ether ND 50 " <br /> 1,2-Dtbromoethane(EDB) ND 50 <br /> 1,2-Dichloroethane ND 50 " <br /> Ethanol ND 10000 <br /> Ethyl tert-butyl ether ND 50 " <br /> Ethylbenzene ND 50 " <br /> Methyl tert-butyl ether 7500 50 " <br /> Toluene ND 50 " <br /> Xylenes(total) ND 50 " <br /> Gasoline Range Organics(C4-Cl2) 5300 5000 PV <br /> Surrogate 1 2-Dtchloroethane-d4 102% 60-135o <br /> " <br /> uoia Analytical-Morgan Hill The results in this report apply to the samples analy_ed 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 18 <br />