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8 19 <br /> `' , Sequoia Sacramento <br /> Ave5te8 <br /> ■ -�� Sacramen[o CA 95834 <br /> Analytical FAX(916)921 9600 <br /> (916)421 0100 <br /> www sequoialabs cum <br /> 0 <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- Quality Control <br /> Sequoia Analytical- Sacramento <br /> Repotting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 3070157-EPA 5030B IP/T] <br /> Blank(3070157-BLKI) Prepared&Analyzed 07/11/03 <br /> Tert-butyl alcohol ND 100 119/1 <br /> Di-isopropyl ether ND 2 0 " <br /> Ethyl tort-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 _ <br /> Surrogate 12-DCA-d4 22 6 25 0 90 60-140 <br /> Laboratory Control Sample(3070157-BSI) Prepared&Analyzed 07/11/03 <br /> Surrogate 1,2-DCA-d4 260 ug/1 250 104 60-140 <br /> Matrix Spike(3070157-MS1) Source S306625-08 Prepared 07/11/03 Analyzed 07/12/03 <br /> Surrogate 12-DCA-d4 244 ug/1 25 0 98 60-140 <br /> Matrix Spike Du 3070157-MSD/ -- Source S306625-08 - Prepared 07/11/03 Analyzed 07/12/03 <br /> Surrogate 1 2-DCA-d4 261 ug/1 250 104 60-140 <br />�atc63070158-EPA 50308 <br /> Blank 3070158-BLKI Prepared 07/13/03 Analyzed 07/14/03 <br /> Tert-butyl alcohol ND 100 ug/l <br /> Di-isopropyl ether ND 2 0 " <br /> Ethyl tort-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(EDH) ND 2 0 " <br /> Surrogate 11-DCA-d4 28 7 25 0 115 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 16 of 18 <br />