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885 Jarvis Drive <br /> Sequoia MorganHill CA 95037 <br /> (408)776-9600 <br /> Analytical FAX cquoi lab 6308 <br /> om <br /> www sequoialabs coin <br /> Secor-Rancho Cordova(ARCO) Project ARCO#4932,Stockton,CA MNG0371 <br /> 3017 Kilgore Rd Suite 100 Project Number 63964 Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 08/03/04 16 21 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical-Morgan Hill <br /> Reporting <br /> Analyte Result lama Units Dilution Batch Prepared Analyzed Method Note <br /> DMW-2(MNG0371-17)Water Sampled 07/14/04 09 42 Received 07/14/04 13 40 <br /> tert-Amyl methyl ether ND 050 ugll l 4G22001 07/22/04 07/22/04 EPA 8260E <br /> Benzene ND 050 " <br /> tert-Butyl alcohol ND 20 " <br /> Di-isopropyl ether ND 0 50 " <br /> 1,2-Dibromoethane(EDB) ND 0 50 " <br /> 1,2-Dichloroethane 056 050 " <br /> Ethanol ND 100 Ic <br /> Ethyl tert-butyl ether ND 050 " <br /> Ethylbenzene ND 050 " <br /> Methyl tert-butyl ether 14 050 " <br /> Toluene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Gasoline Range Organics(C4-C12) ND 50 " <br /> •Surrogate 1,1-Dichloroethane-d4 86% 78-119 <br /> DMW-3(MNG0371-18)Water Sampled 07/14/04 10 28 Received 07/14/04 13 40 <br /> tert-Amyl methyl ether ND 050 ug/1 1 41322001 07/22/04 07/22/04 EPA 8260E <br /> Benzene ND 050 " <br /> tert-Butyl alcohol ND 20 " <br /> Di-isopropyl ether ND 050 " <br /> 1,2-Dibromoethane(EDB) ND 050 " <br /> 1,2-Dichloroethane 25 050 " ^ <br /> Ethanol ND 100 IC <br /> Ethyl tert-butyl ether ND 050 " <br /> Ethylbenzene ND 050 " <br /> Methyl tert-butyl ether 093 050 " <br /> Toluene ND 0 50 <br /> Xylenes(total) ND 050 " <br /> Gasoline Range Organics(C4-C12) ND 50 " <br /> Surrogate 1 1-Dichloroethane-d4 87% 78-129 " <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 on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 12 of 24 <br />