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Drove <br /> 4D 885 885l,CA 5037 <br /> Morgan Hill,CA 95037 <br /> (408)776- 0 <br /> Analytical FAX(aoa)7sz-636sv8 <br /> www sequoialabs com <br /> t� <br /> URS Corporation[Arco]) Project ARCO#2186,Stockton,CA MOI0313 <br /> 2870 Gateway Oaks Dr,Ste 300 Project Number GOBZM-0002 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 09/28/05 10 46 <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 Nott <br /> MW-1 (MOI0313-01)Water Sampled 09/08/05 11 27 Received 09/09/05 07 55 <br /> tert-Amyl methyl ether ND 50 ug/l 100 5120037 09/20/05 09/21/05 EPA 8260B <br /> Benzene 390-*' 50 <br /> tert-Butyl alcohol ND 2000 <br /> Di-isopropyl ether ND 50 <br /> 1,2-Dibromoethane(EDB) ND 54 " ^ <br /> l,2-Dtch10r0ethane ND 50 " ^ <br /> Ethanol ND 10000 ^ " <br /> Ethyl tert-butyl ether ND 50 <br /> Ethylbenzene 290 C 50 <br /> Methyl tert-butyl ether 450- 50 11 " <br /> Toluene 99// 50 ^ <br /> Xylenes(total) 1200 / 50 " ^ <br /> Gasoline Range Organics(C4-C12) 6400 5000 <br /> .Surrogate 1 2-Dtchloroethane-d4 77% 60435 ^ ^ ^ <br /> MW-2(MOI0313-02)Water Sampled 09/08/05 13 40 Received 09/09/05 07 55 <br /> tent-Amyl methyl ether ND 050 ug/1 1 5120037 09/20/05 09/21/05 EPA 8260B <br /> Benzene ND 050 " <br /> tert-Butyl alcohol ND 20 <br /> Di-isopropyl ether ND 0 50 " ^ <br /> 1,2-Dibromoethane(EDB) ND 050 " <br /> 1,2-Dichloroethane ND 050 " <br /> Ethanol ND 100 <br /> Ethyl ten-butyl ether ND 050 ^ <br /> Ethylbenzene ND 050 <br /> Methyl tert-butyl ether ND 0 50 <br /> Toluene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Gasoline Range Organics(C4-C12) ND 50 <br /> Surrogate 12-Dtchloroethane-d4 81 % 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 3 of 12 <br />