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a-- ) 885 larvas DriveSequoia Morgan hill CA 95037 <br /> (408)776 9609 <br /> Analytical FAX(4 08)782-6398 <br /> WWW sequoialabs com <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 Limit Units Dilution Batch Prepared Analyzed Method Note <br /> DMW-2(MN30793-15)Water Sampled 10/27/04 12 55 Received 10/29/04 09 30 <br /> tert-Amyl methyl ether ND 050 ugll 1 4KO4005 11/04104 11/05/04 EPA 8260B <br /> Benzene 14 050 ^ <br /> tert-Butyl alcohol ND 20 « « <br /> Di-isopropyl ether AID 050 <br /> 1,2-Dtbromoethane(EDB) ND 050 <br /> 1,2-Dichloroethane ND 050 <br /> Ethanol ND 100 <br /> Ethyl tert-butyl ether ND 050 " " « PE <br /> Ethylbenzene ND 050 " ^ <br /> Methyl tert-butyl ether 18 050 " « <br /> Toluene 3 2 050 <br /> Xylenes(total) 2 8 050 <br /> Gasoline Range Organics(C4-C12) ND 50 <br /> Surrogate 1,2-Dichloroethane-d4 83% 78-129 " <br /> DMW-3(MNJ0793-16)Water Sampled 10/27/04 13 45 Received 10/29/04 09 30 <br /> tert-Amyl methyl ether ND 050 ug/I 1 4KO4005 11/04/04 11/05/04 EPA 8260E <br /> Benzene 059 050 <br /> tert-Butyl alcohol ND 20 <br /> Di-isopropyl ether ND 050 " ^ <br /> 1,2-Dtbromoethane(EDB) ND 0 50 <br /> 1,2-Dichloroethane 16 050 ^ ~ ^ « <br /> Ethanol ND 100 " <br /> Ethyl tert-butyl ether ND 0 50 PE <br /> Ethylbenzene ND 0 50 " ^ <br /> Methyl tert-butyl ether 19 050 " « <br /> Toluene 16 050 <br /> Xylenes(total) 17 0 50 <br /> Gasoline Range Organics(C4-C12) ND 50 <br /> Surrogate 1,2-Dichloroethane-d4 78% 78-129 " <br /> Sequoia Analytical -Morgan Hill The results to this report apply to the samples analyzed in accordance with the charm of <br /> custody document Unless otherwise stated results are reported on a we/weight basis <br /> This analytrcal report must be reproduced in its entirety <br /> Page I 1 of 22 <br />