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Sequoia Jarvis <br /> Morgan Hill CA 930375037 <br /> (408)776 9600 <br /> Analytical FAX(4 08)782 6309 <br /> www sequotalabs corn <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 /> Analyte Result Lama Units Dilution Batch Prepared Analyzed Method Note <br /> MW-5(MNJ0793-05)Water Sampled 10/26/04 17 37 Received 10/29/04 09 30 <br /> Cert-Amyl methyl ether ND 10 ug/1 2 4KO4005 11/04/04 11/04/04 EPA 8260B <br /> Benzene ND 10 <br /> tert-Butyl alcohol ND 40 <br /> Di-isopropyl ether ND 10 <br /> 1,2-Dibromoethane(EDB) ND 1 0 ^ ^ ^ ^ <br /> 1,2-Dichloroethane 15 10 <br /> Ethanol ND 200 " <br /> Ethyl tert-butyl ether ND 10 <br /> Ethylbenzene ND I0 <br /> Methyl tert-butyl ether 74 1 0 " ^ <br /> Toluene ND 10 ^ " <br /> Xylenes(total) ND 10 <br /> Gasoline Range Organics(C4-C12) ND 100 <br /> Surrogate 1 1-Drchloroethane-d4 88% 78-119 � « <br /> MW-6(MNJ0793-06)Water Sampled 10/27/04 15 50 Received 10/29/04 09 30 <br /> tert-Amyl methyl ether ND 100 ug/I 200 4K04005 11/04/04 11/04/04 EPA 8260B <br /> Benzene ND 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 ^ ^ ^ ^ ^ ^ <br /> Ethanol ND 20000 <br /> Ethyl tert-butyl ether ND 100 <br /> Ethylbenzene ND 100 <br /> Methyl tert-butyl ether 16000 100 <br /> Toluene ND 100 <br /> Xylenes(total) ND too <br /> Gasoline Range Organics(C4-C12) ND 10000 <br /> Surrogate 1 2-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 6 of 22 <br />