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8 19 <br /> rike <br /> Sequoia Sacra <br /> amento to Ave Ste B <br /> CA 95674 <br /> IX) Analytical FAX(916)921 9600 <br /> (916)921 0100 <br /> qW www sequoialabs com <br /> SECOR International-Rancho Cordova Project TOSCO 11193, Stockton,CA 5304255 <br /> 3017 Kilgore Road,Suite 100 Project Number NIA Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 04/29/03 08 52 <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 /> W-9(S304255-091 Water Sampled, 04/07/03 14.18 Received,04/09/03 17 20 _ <br /> Tert-butyl alcohol ND 100 ug/1 1 3040319 04/18/03 04/19/03 EPA 8260E <br /> Di-isopropyl ether / ND 2 0 " <br /> Ethyl tert-butyl ether ND 2 0 " <br /> Tert-amyl methyl ether 5 8 2 0 " <br /> Ethanol ND 500 " <br /> 1,2-Dichloroethane ND 2 4 <br /> 1,2-Dibromoethane(EDB) ND 20 " <br /> Surrogate 1 1-DCA-d4 134% 60-140 <br /> MW-9(S 04255-09RE1)Water_ Sampled 04/07/03 14 18 Received 04/09/03 17 20 <br /> Methyl tert-butyl ether 460 J/ 20 ug/l- 10 3040319 04/19/03 04/19/03 EPA 8260B <br /> Surrogate 12-DCA-d4 86% 60-140 " <br /> MW-10(5304255-10)Water Sampled 04/07/03 1S 15 Received 04/09/03 17 20 <br /> Tert-butyl alcohol ND 100 ug/I 1 3040319 04/18/03 04/19/03 EPA 8260B <br /> Methyl tert-butyl ether ND 20 <br /> Di-isopropyl ether ND 20 ' <br /> Ethyl tert-butyl ether ND --20-_20r <br /> Tert-amyl methyl ether Y ND' 2 Q " <br /> , <br /> Ethanol ND 500 " <br /> 1,2-DiWoroethane _ _ 2-0-11 <br /> 1,2-Dibromoethane(EDB) ND 20. <br /> " <br /> Surrogate 12-DCA-d4 100% 60-140 " <br /> VW-1(S304255-11)Water Sampled 04/07/03 18 40 Received 04/09/03 17 20 _ <br /> Methyl tert-butyl ether 220 20 ug/l 10 3040319 04/18/03 04/19/03 EPA 8260B <br /> Di-isopropyl ether ND 20 " 11 " " <br /> Ethyl tert-butyl ether 21 20 " <br /> Tert-amyl methyl ether ND 20 " <br /> Ethanol ND 5000 " <br /> 1,2-Dichloroethane ND 20 " <br /> 1,2-Dibronioethane(EDB) ND 20 ~ <br /> Surrogate 1 2-DCA-d4 101 % 60-140 " <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 10 of 19 <br />