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819 Striker Avenue,Suite 8 <br /> a— ) Sequoia saerame(9 6CA 19-% <br /> Analytical FAX(916)921-0106 <br /> www sequoialabs com <br /> SECOR International-Rancho Cordova Protect Tosco 1205,Lathrop,CA <br /> 3017 Kilgore Road,Suite 100 Project Number N/A Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 07/09/02 16 26 <br /> Gasolme\BTEXIOxygenates by EPA method 8260B- Quality Control <br /> Sequoia Analytical- Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 2060375-EPA 5030B 1P/Tl <br /> Matrix S ike Du (2060375-MSDl) Source S206360-02 Prepared&Analyzed 06/27/02 <br /> Methyl tert-butyl ether 0 0406 0 0050 mg/kg 00436 ND 93 60-140 0 5 25 <br /> Benzene 0 0258 0 0050 00268 ND 96 60-140 2 25 <br /> Toluene 0 156 0 0050 0 162 ND 96 60-140 0 6 25 <br /> Gasoline(C6-C10) 1 89 1 0 220 ND 86 60-140 2 25 <br /> Surrogate 1 2-DCA-d4 00510 00500 102 60-140 <br /> Surrogate Toluene-d& 00535 00500 107 60-140 <br /> Surrogate 4-BFB 00545 00500 109 60-140 <br /> quota Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain <br /> of custody document This analytical report must be reproduced in its entirety <br /> Page Page 5 of 6 <br />