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1885 Jarvis Drive <br /> Sequoia Morgan Hill,CA 95p37 <br /> a—W) (408)776-9600 <br /> Analytical FAX(409)782-6308 <br /> { <br /> www.sequoialabs.com <br /> Secor-Rancho Cordova(ARCO) Project:ARCO#4932,Stockton,CA MOG0595 <br /> 3017 Kilgore Rd.Suite 100 Project Number:GOC8D-0001 Reported: <br /> Rancho Cordova CA,95670 Project Manager:Clinton Harms 08/01/05 11:10 <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-3(MOG0595-03)Water Sampled:07/12/05 12:40 Received:07/16/05 10:00 <br /> tert-Amyl methyl ether ND 0.50 ugll i 5G25012 07/25/05 07/25/05 EPA 8260B <br /> Benzene ND 0.50 " <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 ND 0.50 " <br /> Ethanol ND 100 IC <br /> Ethyl tert-butyl ether ND 0.50 <br /> Ethylbenzene ND 0.50 " <br /> Methyl tert-butyl ether 0.63 0.50 <br /> Toluene ND 0.50 n 1. " <br /> Xylenes(total) ND 0.50 <br /> Gasoline Range Organics(C4-C12) ND 50 <br /> �Srtrrogare: 1,2-Dichloroethane-d4 122% 60-135 " <br /> 1IW-4(MOG0595-04)Water Sampled:07/12/05 10:30 Received:0711610510:00 <br /> tert-Amyl methyl e'iher ND 0.50 ug/l 1 SG25012 07/25/05 07/25/05 EPA 8260B <br /> Benzene 16 0.50 " <br /> tert-Butyl alcohol 330 20 <br /> Di-isopropyl ether ND 0.50 " <br /> 1,2-Dibromoethane(EDB) ND 0.50 ^ <br /> 1,2-Dichloroethane ND 0.50 " <br /> Ethanol ND 100 " Ic <br /> Ethyl tert-butyl ether ND 0.50 ^ ^ <br /> Ethylbenzene 10 0.50 " <br /> Methyl tert-butyl ether 15 0,50 " <br /> Toluene 94 0.50 " <br /> Xylenes(total) 95 0.50 <br /> Gasoline Range Organics(C4-C12) 1100 50 j <br /> Surrogate: 1,2-Dichloroethane-d4 86% 60-135 " <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 4 of 27 <br />