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Sequoia 8851arvis Drive <br /> Morgan Hill CA 95037 <br /> Analytical (408)776 9600 <br /> FAX eVos 7iibs ca 8 <br /> www coquotalabs cam <br /> Secor-Rancho Cordova(ARCO) Project ARCO#!4932,Stockton,CA <br /> 3017 Kilgore Rd Suite 100 Project Number 63964 MN10793 <br /> Rancho Cordova CA 95670Reported <br /> Project Manager Rusty Henkosky <br /> 11/12/04 12 23 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical -Morgan Hill <br /> [�E <br /> Reporting <br /> Result Lamlt Units Dilution Batch Prepared Analyzed Method <br /> Now <br /> MW-3(MNJ0793-03)Water Sampled 10/27/0412 10 Received 10/29104 09 30 <br /> tort-Amyl methyl ether ND 0 50 ug/1 1 4KO3010 11/03/04 11/04/04 <br /> Benzene ND 0 50 EPA 82608 <br /> " <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 ^ " <br /> ND 0 50 ^ „ <br /> Ethanol ND 100 <br /> Ethyl tert-butyl ether ND 0 50 " ^ Ic <br /> Ethylbenune ND 050 <br /> Methyl tert-butyl ether 7 9 050 ^ <br /> Toluene ND 050 <br /> Xylenes(total) ND 050 <br /> Gasolme Range Organics(C4-C12) ND 50 <br /> Surrogate 1,2-Drchloroethane-d4 96% 78-119ABW <br /> W4(MNJ0793-04)Water Sampled 10/27/04 16 15 Received 10/29/04 09 30 " ^ <br /> tent-Amyl methyl ether ND 2 5 ugn 5 4KO4005 11/04/04 11/04/04 EPA 82608 <br /> Benzene 13 2 5 " ^ <br /> tert-Butyl alcohol 3700 100 <br /> Di-Isopropyl etherND <br /> 2 5 ^ <br /> 1,2-Dibromoethane(EDB) ND 2 5 <br /> 1,2-Dichioroedme 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-C11) 2300 250 <br /> Surrogate 1 2-Drchloroethane-d4 95910, 78-129 <br /> Sequoia Analytical-Morgan Hill The results in this PP <br /> report apply to the samples analyzed in accordance with the chain of <br /> P <br /> custody document Unless otherwise stated results are reported on a wet werght basis <br /> This analytical report must be reproduced rn its entirety <br /> Page 5 of 22 <br />