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885 to Drive <br /> Sequoia Morgan Hill,CAA 950375037 <br /> (408)776 9600 <br /> Analytical FAX(408) la26309 <br /> orn <br /> www squoiaabs coin <br /> URS Corporation TArco17 Project ARCO#5469,Stockton,CA M000479 <br /> 2870 Gateway Oaks Dr,Ste 300 Project Number G09JZ-0290 Reported <br /> Sacramento CA,95833 Project Manager Jay Johnson 04/07/05 12 53 <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 [tote <br /> MW-7(M000479-07)Water Sampled 03/16/05 04 06 Received 03/17/05 11 09 <br /> tert-Amyl methyl ether ND 050 ug/l I 5C29006 03/29/05 03/30/05 EPA 8260E <br /> Benzene ND 0 50 " <br /> tert-Butyl alcohol ND 20 " <br /> Di-isopropyl ether ND 050 " <br /> 1,2-Dibromoethane(EDB) ND 0 50 " <br /> 1,2-Dichloroethane 1 7 050 PE <br /> Ethanol ND 100 <br /> Ethyl tert-butyl ether ND 0 50 " <br /> Ethylbenzene ND 050 <br /> Methyl tert-butyl ether ND 050 " <br /> Toluene ND 0 50 " <br /> Xylenes(total) ND 0 50 <br /> Gasoline Range Organics(C4-C12) ND 50 " <br /> Wogate 1 2-Dtchloroethane-d4 102% 60-135 <br /> 8(M000479-08)Water Sampled 03/16/05 05 16 Received 03/17/05 11 09 <br /> tert-Amyl methyl ether ND 100 ug/l 200 5C29006 03/29/05 03/29/05 EPA 8260B <br /> Benzene 600 100 " <br /> tert-Butyl alcohol ND 4000 " <br /> Di-isopropyl ether ND 100 " <br /> 1,2-Dibromoethane(EDB) ND 100 " <br /> 1,2-Dichloroethane ND 100 PE <br /> Ethanol ND 20000 " <br /> Ethyl tert-butyl ether ND 100 " <br /> Ethylbenzene ND 100 " <br /> Toluene ND 100 " <br /> Xylenes(total) ND 100 " <br /> Gasoline Range Organics(C4-C12) 27000 10000 PV <br /> Surrogate 1,2-Dtchloroethane-d4 104% 60-135 <br /> nota 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 8 of 30 <br />