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885 Jarvis Dr <br /> Sequoia Main Hill,CA95037 <br /> 77 <br /> (408)776 9600 <br /> !W Analytical FAX(408)7abscom <br /> www sequoialabs can <br /> Secor-Rancho Cordova Project ARCO#4932,Stockton,CA MLK0860 <br /> 3017 Kilgore Rd Suite 100 Project Nurnber ARCO#4932,Stockton,CA Reported <br /> Rancho Cordova CA,95670 Protect Manager Rusty Benkosky 12/23/02 10 48 <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 Notes <br /> MW-9(MLK0860-09)Water Sampled 11/21/02 08 28 Received 11/22/02 11 52 <br /> tert-Butyl alcohol ND 20 ug/l 1 2L12027 12/04/02 12/05/02 EPA 8260B <br /> Methyl tert-butyl ether ND 050 " <br /> Di-isopropyl ether ND 050 <br /> Ethyl tert-butyl ether ND 050 <br /> cert-Amyl methyl ether ND 050 " " " „ " 0-09 <br /> 1,2-Dtchloroethane ND 050 <br /> 1,2-Dibromoethane(EDB) ND 050 <br /> Surrogate 1,2-Dichloroethane-d4 874% 78-129 " <br /> _MW-10(MLK0860-10)_Water Sampled 11/20/02 15 06 Received 11/22/02 11 52 <br /> tert-Butyl alcohol ND 20 ug/I 1 2L12026 12/04/02 12/04/02 EPA 8260B <br /> Methyl tert-butyl ether ND 0 50 " <br /> Di-isopropyl ether ND 0 50 " <br /> Ethyl tert-butyl ether ND 0 50 <br /> tert-Amyl methyl ether ND 0 50 " " 0-09 <br /> 1,2-Dichloroethane ND 0 50 " <br /> 1,2-Dibromoethane(EDB) ND 050 " <br /> Surrogate 1,1-Dichloroethane-d4 808% 78-129 0-10 <br /> MW-11(MLK0860-11)Water Sampled 11/20/02 15 40 Received 11/22/02 11 52 _ <br /> tert-Butyl alcohol ND 20 uglt I 2L12026 12/04/02 12/04/02 EPA 8260B <br /> Methyl tert-butyl ether ND 050 <br /> Di-isopropyl ether ND 0 50 <br /> Ethyl tert-butyl ether ND 050 <br /> tert-Amyl methyl ether ND 050 0-09 <br /> 1,2-Dichloroethane ND 0 50 " <br /> 1,2-Dtbromoethane(EDB) ND 050 <br /> Surrogate 1,2-Drchloroethane-d4 790016 78-129 0-10 <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 baso <br /> This analytical report must be reproduced in its entirety <br /> Page 12 of 23 <br />