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885 Jarvis Dnve <br /> Sequoia Morgan Hill CA 95037 <br /> (408)776-9600 <br /> qW Analytical FAX(408)782-6308 <br /> www sequo,alabs com <br /> URS Corporation[Arcola Project ARCO#5469, Stockton,CA MNI0470 <br /> 2870 Gateway Oaks Dr, Ste 300 Project Number NIP Reported <br /> Sacramento CA,95833 Project Manager Jay Johnson 09/29/04 17 33 <br /> I <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-7(MNI0470-05)Water Sampled 09/14/04 03 15 Received 09/15/04 11 30 <br /> tert-Amyl methyl ether ND 050 ug/I 1 4123011 09/23/04 09/23/04 EPA 8260H <br /> Benzene ND 050 11 " <br /> i <br /> tert-Butyl alcohol ND 20 <br /> Di-isopropyl ether ND 050 <br /> 1,2-Dtbromoethane(EDB) ND 050 " <br /> 1,2-Dichloroethane 13 0 50 <br /> Ethanol ND 100 " " „ " IC <br /> Ethyl tert-butyl ether ND 050 <br /> Ethylbenzene ND 050 " <br /> Methyl Cert-butyl ether ND 0 50 " <br /> Toluene ND 050 " <br /> Xylenes(total) ND 050 <br /> Gasoline Range Organics(C4-C 12) ND 50 " <br /> Surrogate 12-D'chloroethane-d4 88% 78-129 " <br /> IW8(MN10470-06)Water Sampled 09/14/04 04 34 Received 09/15/04 11 30 - - <br /> tert-Amyl methyl ether ND 250 ug/1 500 4I23011 09/23/04 09/23/04 EPA 8260B <br /> Benzene 420 250 " " <br /> tert-Butyl alcohol ND 10000 " <br /> DI-isopropyl ether ND 250 <br /> 1,2-Dtbromoethane(EDB) ND 250 " <br /> 1,2-Dichloroethane ND 250 " <br /> Ethanol ND 50000 " IC <br /> Ethyl tert-butyl ether ND 250 " <br /> Ethylbenzene ND 250 " <br /> Methyl tert-butyl ether 20000 250 " <br /> Toluene ND 250 <br /> Xylenes(total) ND 250 <br /> Gasoline Range Organics(C4-C12) 25000 25000 <br /> Surrogate 1,2-Dichloroethane-d4 92% 78-129 " <br /> �ota Analytical -Morgan Hill The results in this report apply to the samples analyzed to accordance with the chain of <br /> custody document Unless otherwise stated results are reported on a wet weight bas's <br /> This analytical report must be reproduced in its entirety <br /> Page 6 of 17 <br />