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885 Janis Dm e <br /> Sequoia Morgan Hill CA 95037 <br /> a— (408)776 9600 <br /> Analytical FAX(408)782-6306 <br /> www sequoialabs coin <br /> Secor-Rancho Cordova(ARCO) Project ARCO#4932,Stockton,CA MNJ0793 <br /> 3017 Kilgore Rd Suite 100 Project Number 63964 Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 11/12/04 12 23 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical - Morgan Hill <br /> Reporting <br /> Analyse Result limit Units Dilution Batch Prepared Analyzed Method Note <br /> MW-3(MNJ0793-03)Water Sampled 10/27/04 12 10 Received 10/29/04 09 30 <br /> tert-Amyl methyl ether ND 050 ugtl I 4KO3010 11/03/04 11/04/04 EPA 8260B <br /> Benzene ND 050 ^ " <br /> tert-Butyl alcohol ND 20 ^ ^ ^ ^ <br /> DI-isopropyl ether ND 0 50 <br /> 1,2-Dibromoethane(EDB) ND 050 <br /> 1,2-Dichloroethane ND 0 50 " <br /> Ethanol ND 100 „ " " IC <br /> Ethyl tert-butyl ether ND 050 <br /> Ethylbenzene ND 050 <br /> Methyl tert-butyl ether 79 050 <br /> Toluene ND 050 <br /> Xylenes(total) ND 050 <br /> Gasoline Range Organics(C4-C12) ND 50 <br /> Surrogate 1,2-Drchloroethone-d4 96% 78-129 " <br /> MW-4(MNJ0793-04)Water Sampled 10/27/04 16 15 Received 10/29/04 09 30 <br /> tert-Amyl methyl ether ND 2 5 ug1] 5 4KO4005 11/04/04 11/04/04 EPA 8260B <br /> Benzene 13 2 5 " <br /> tert-Butyl alcohol 3700 100 <br /> DL-isopropyl ether ND 2 5 " <br /> 1,2-Dibromoethane(EDB) ND 2 5 <br /> 1,2-Dichloroethane ND 2 5 <br /> Ethanol ND 500 <br /> Ethyl tert-butyl ether ND 2 5 <br /> Ethylbenzene 31 2 5 <br /> Methyl tert-butyl ether 11 2 5 <br /> Toluene 82 2 5 <br /> Xylenes(total) 370 2 5 <br /> Gasoline Range Organics(C4-C12) 2300 250 <br /> Surrogate 1,1-Dichloroethane-d4 85% 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 5 of 22 <br />