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l <br /> Et Sequoia 885 Jarvis Drive <br /> Morgan Hill,CA 95037 <br /> 408 776-9600 <br /> Analytical FAX{408}782-6308 <br /> www.scquoialeLbs.com <br /> I <br /> URS Corporation[Arcot] Project:ARCO#2130,Stockton,CA M010544 <br /> 2870 Gateway Oaks Dr.,Ste 300 ProjectNumber:GOBZK-0002 Reported- <br /> Sacramento�CA, <br /> eported:SacramentoCA,95833 Project ManagerNemon P.Elarth 09/29/05 14:23 <br /> Volatile Organic Compounds by EPA Method 8260B i <br /> Sequoia Analytical-Morgan Hill <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Note <br /> MW-5(MOI0544-05)Water Sampled:09/11/0508-10 Received:09/14/0508:55 <br /> Cert-Amyl methyl ether ND 0.50 ugll 1 5I22001 09/22/05 09/22/05 EPA 8260B ' <br /> Benzene 5.4 0.50 " <br /> tert-Butyl alcohol ND 20 <br /> Di-isopropyl ether ND 0.50 " <br /> 1,2-Dichloroethane ND 0.50 " <br /> Ethanol ND 100 <br /> Ethyl tert-butyl ether ND 0.50 " <br /> Ethylbenzene 3.2 0.50 " <br /> Methyl tert-butyl ether 14 0.50 " <br /> Toluene 6.4 0.50 " <br /> Xylenes(total) 15 0.54 " <br /> Gasoline Range Organics(C4-C12) 170 50 " <br /> Surrogate:1,2-Dichloroethane-d4 78% 60-135 " <br /> MW-6(MOI0544-06)Water Sampled:09/11/05 13:55 Received:09/14/05 08:55 <br /> ,ert-Amyl methyl ether ND 0.50 ugll 1 5I22001 09/22/05 09/22/05 EPA 8260E <br /> Benzene ND 0.50 " <br /> tert-Butyl alc6hol ND 20 " <br /> Di-isopropyl ether ND 0.50 " <br /> 1,2-Dichloroethane 1.2 0.50 " <br /> Ethanol ND 100 " <br /> Ethyl tert-butyl ether ND 0.50 " <br /> Ethylbenzene ND 0.50 " <br /> Methyl tert-butyl ether ND 0.50 " <br /> Toluene ND 0.50 " <br /> v <br /> Xylenes(total) ND 0.50 " <br /> Gasoline Rarige Organics(C4-C12) 77 50 Py <br /> Surrogate:1,2-Dichloroethane-d4 78% 60-135 " <br /> t <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 art a wet weight basis. <br /> This analytical report must be reproduced in its entirety. <br /> Page 5 of 25 <br /> t <br /> 1 <br />