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i�l Y f <br /> Sequoia acre819 <br /> enkerAve Ste B <br /> Sacramento CA 95874 <br /> a— ) (916)► Analytical FAX(916)9210100 <br /> www aequoia3abs cam <br /> f <br /> SECOR International-Rancho Cordova Project TOSCO 11193,Stockton,CA S306625 <br /> 3017 Kilgore Road,Suite 100 Project Number N/A Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 07/30/03 13 04 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical-Sacramento <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW4(5306625-04)Water Sampled 06/27/03 13 02 Received 06/30/03 12 20 <br /> Tert-butyl alcohol ND 100 ugA 1 3070157 07/11/03 07/11/03 EPA 8260B <br /> Dr-isopropyl ether ND 2 0 " <br /> Ethyl tert-butyl ether ND 2 0 ^ <br /> Tert-amyl methyl ether ND 2 0 " ^ ^ " <br /> Ethanol ND 500 " <br /> 1,2-Dichloroethane ND 20 ^ <br /> 1,2-Dibromoethane(EDB) ND 20 ^ " <br /> Surrogate 12-DCA-d4 115% 60-140 " <br /> MW-5(5306625-05)Water Sampled 06/27/03 12 35 Received 06/30/03 12 20 <br /> Tert-butyl alcohol 1600 100 UFA 1 3070157 07/11/03 07/11/03 EPA 8260B A-01 <br /> Di-isopropyl ether ND 2 0 " <br /> Ethyl tert-butyl ether ND 2 0 <br /> ert-amyl methyl ether ND 20 <br /> not ND 500 <br /> ,2-Dichloroethane ND 2 0 " <br /> 1,2-Dtbromoethane(EDB) ND 2 0 <br /> Surrogate 1,2-DCA-d4 103% 60-140 " <br /> MW-6(5306625-06)Water Sampled 06/27/031455 Received 06/30/031220 <br /> Tert-butyl alcohol 590 100 ug/l 1 3070157 07/11/03 07/11/03 EPA 8260B <br /> Dr-isopropyl ether ND 2 0 ^ <br /> Ethyl cert-butyl ether ND 2 0 <br /> Tert-amyl methyl ether ND 2 0 <br /> Ethanol ND 500 <br /> 1,2-Dichloroethane ND 2 0 <br /> 1,2-Dibromoethane(EDB) ND 2 0 H " ^ ^ " <br /> Surrogate 1,2-DCA-d4 110% 60-140 <br /> I <br /> Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain <br /> . of custody document Unless otherwise stated,results are reported on a wet weight <br /> basis This analytical report must be reproduced in its entirety <br /> Page 9 of 18 <br />