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885 Jarvis Drive <br /> Sequoia Morgan FEIL CA 95037 <br /> (408)776-9600 <br /> Analytical www.sequoialabs.com(408)7abs.c o8 <br /> wwequoralabs.carn <br /> URS Corporation[Arcola Project: ARCO 40548,Stockton,Ca MNI-10053 <br /> 2870 Gateway Oaks Dr.,Ste 300 Project Number: N/P Reported: <br /> ' Sacramento CA,95833 Project Manager: Vernon P.Elarth 08/06/04 16:20 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical - Morgan Hill <br /> Reporting <br /> Analyte Result limit Units Dilution Balch Prepared Analyzed Method Note <br /> MW-3(MNI-10053-03)Water Sampled:08/03/04 06:10 Received:08/04/04 09:30 <br /> tert-Amyl methyl ether ND 0.50 ug/I 1 4HO5021 08/05/04 08/05/04 EPA 8260B <br /> Benzene ND 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 ND 0.50 " <br /> Methyl tert-butyl ether ND 0.50 " <br /> ' Toluene ND 0.50 <br /> Xylenes(total) ND 0.50 " <br /> Gasoline Range Organics(C4-C]2) ND 50 " <br /> Surrogale: 1,2-Dichloroethane-d4 98% 78-129 " <br /> MW-4(MNH0053-04)Water Sampled: 08/03/04 05:09 Received: 08104/04 09:30 <br /> IR <br /> tert-Amyl methyl ether ND 0.50 ug/I 1 4HO5021 08/05/04 08/05/04 EPA 8260B <br /> ' Benzene ND 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 ND 0.50 " <br /> ' Methyl tert-butyl ether ND 0.50 <br /> Toluene ND 0.50 <br /> Xylenes(total) ND 0.50 <br /> Gasoline Range Organics(C4-C12) ND 50 <br /> ' Surrogate: 1,2-Dichloroethane-d4 99% 78-129 " <br /> 1 <br /> �I <br /> equoia 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 16 <br />