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a_ _� <br /> 8Ni Jarvis 5037 <br /> Sequoia MorganHdl CA 95037 <br /> (408)776 9600 <br /> Analytical FAX(408)782 6308 <br /> www seguioialabs 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 /> MW-11(MNJ0793-11)Water Sampled 10/26/04 17 15 Received 10/29/04 09 30 <br /> tert-Amyl methyl ether ND 050 up/l I 4KO4005 11/04/04 11/05/04 EPA 8260B <br /> Benzene ND 050 " ^ ^ " <br /> tert-Butyl alcohol ND 20 " It <br /> Dt-isopropyl ether ND 0 50 " « <br /> 1,2-Dibromoethane(EDB) ND 0 50 " ^ <br /> 1,2-Dichloroethane ND 0 50 " ^ <br /> Ethanol ND 100 <br /> Ethyl tert-butyl ether ND 0 50 " " PE <br /> Ethylbenzene ND 0 50 ^ <br /> Methyl tert-butyl ether ND 0 50 <br /> Toluene ND 0 50 <br /> Xylenes(total) ND 0 50 <br /> Gasoline Range Organics(C4-C 12) ND 50 <br /> Surrogate 1,2-Drchloroethane-d4 90% 78-129 <br /> EW-1 (MNJ0793-12)Water Sampled 10/27/04 12 05 Received 10/29/04 09 30 <br /> tert-Amyl methyl ether ND 25 ug/l 50 4KO4005 11/04104 11/05/04 EPA 82608 <br /> Benzene 30 25 " " It <br /> tert-Butyl alcohol ND 1000 <br /> Di-isopropyl ether ND 25 <br /> 1,2-Dibromoethane(EDB) ND 25 <br /> 1,2-Drchloroethane 29 25 <br /> Ethanol ND 5000 <br /> Ethyl tert-butyl ether ND 25 " ^ PE <br /> Ethylbenzene ND 25 <br /> Methyl tert-butyl ether 1900 25 <br /> Toluene 28 25 " ^ <br /> Xylenes(total) 200 25 <br /> Gasoline Range Organics(C4-C12) ND 2500 " ^ <br /> Surrogate 1,2-Drchloroethane-d4 84% 78-129 " <br /> Sequoia Analytical-Morgan Hil l The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document Unle44 otherwise stated results are reported on a wet weight basis <br /> This analytical report must be reproduced to its entirety <br /> Page 9 of 22 <br />