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r 885.Tarvis Drive <br /> Sequoiaht <br /> Morgan tCA 955037037 <br /> (408)776 9600 <br /> Analytical FAX(408)782-6308 <br /> www sequoialabs com <br /> URS Corporation [Arco]a Project ARCO#5469, Stockton,CA MOL0448 <br /> 2870 Gateway Oaks Dr,Ste 300 Project Number GOBZP-0002 Reported <br /> Sacramento CA,95833 Project Manager Jay Johnson 12/22/05 11 44 <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(MOL0448-05)Water Sampled 12/08/05 07 05 Received 12/09/05 08 30 <br /> tert-Amyl methyl ether ND 050 ug/! 1 51-20009 12/20/05 12/20/05 EPA 8260E <br /> Benzene ND 050 " <br /> ter[-Butyl alcohol ND 20 " <br /> Dl-isopropyl ether ND 050 " <br /> 1,2-Dtbromoethane(EDB) ND 050 " <br /> 1,2-Dtchloroethane ND 050 " <br /> Ethanol ND 100 IC <br /> Ethyl tert-butyl ether ND 050 " <br /> Ethylbenzene ND 050 " <br /> Methyl tert-butyl ether 56 050 " <br /> Toluene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Gasoline Range Organics(C4-C12) ND 50 " <br /> Surrogate 1,2-Dtchloroethane-d4 94% 60-135 " <br /> �6(MOL0448-06)Water Sampled 12/081050639 Received 12/09/05 08 30 <br /> tert-Amyl methyl ether ND 25 ug/l 50 51,20009 12/20/05 12/20/05 EPA 8260B <br /> Benzene ND 25 " <br /> tert-Butyl alcohol ND 1000 " <br /> Di-isopropyl ether ND 25 " <br /> 1,2-Dtbromoethane(EDB) ND 25 " <br /> 1,2-Dtchloroethane ND 25 " <br /> Ethanol ND 5000 Ic <br /> Ethyl tert-butyl ether ND 25 " <br /> Ethylbenzene ND 25 " <br /> Methyl tert-butyl ether 2300 25 " <br /> Toluene ND 25 " <br /> Xylenes(total) ND 25 " <br /> Gasoline Range Organics(C4-C12) ND 2500 " <br /> Surrogate 1,2-Dtchloroethane-d4 91 % 60-135 " <br /> uota 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 6of18 <br />